WO2011045913A1 - ズームレンズ系、撮像装置及びカメラ - Google Patents
ズームレンズ系、撮像装置及びカメラ Download PDFInfo
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- WO2011045913A1 WO2011045913A1 PCT/JP2010/006030 JP2010006030W WO2011045913A1 WO 2011045913 A1 WO2011045913 A1 WO 2011045913A1 JP 2010006030 W JP2010006030 W JP 2010006030W WO 2011045913 A1 WO2011045913 A1 WO 2011045913A1
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- Prior art keywords
- lens
- lens group
- image
- zoom lens
- zoom
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Classifications
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B17/00—Details of cameras or camera bodies; Accessories therefor
- G03B17/02—Bodies
- G03B17/17—Bodies with reflectors arranged in beam forming the photographic image, e.g. for reducing dimensions of camera
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B15/00—Optical objectives with means for varying the magnification
- G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
- G02B15/145—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having five groups only
- G02B15/1451—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having five groups only the first group being positive
- G02B15/145113—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having five groups only the first group being positive arranged +-++-
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B15/00—Optical objectives with means for varying the magnification
- G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
- G02B15/16—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group
- G02B15/163—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group
- G02B15/167—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group having an additional fixed front lens or group of lenses
- G02B15/173—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group having an additional fixed front lens or group of lenses arranged +-+
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B17/00—Details of cameras or camera bodies; Accessories therefor
Definitions
- the present invention relates to a zoom lens system, an imaging device, and a camera.
- the present invention has a high resolution and a relatively high zooming ratio, but the number of lenses constituting the lens system is small, and the total lens length (from the object side surface of the lens element located on the most object side of the lens system to the image plane).
- the present invention relates to a high-performance zoom lens system having a short distance on the optical axis, an image pickup apparatus including the zoom lens system, and a thin and compact camera including the image pickup apparatus.
- Japanese Patent Laid-Open No. 2006-267862 discloses, in order from the object side, a first lens group that includes a reflecting member that has a positive refractive power and bends the optical path by approximately 90 degrees; a second lens group that has a negative refractive power; A third lens group having a positive refractive power and having a stop on the most image side and a fourth lens group having a positive refractive power, and the second lens group moves along the optical axis during zooming
- the fourth lens unit moves at the time of zooming and focusing, and the fourth lens unit is composed of a cemented lens and a positive meniscus lens having negative refractive power.
- the entire system at the focal length and the telephoto end of the second lens unit Zoom lens that defines the ratio of the focal length of the fourth lens group and the ratio of the focal length of the fourth lens group to the focal length of the entire system at the telephoto end.
- Japanese Patent Laid-Open No. 2006-317481 discloses, in order from the object side, a first lens group having a positive power, a second lens group having a negative power, a third lens group having a positive power, and a positive power. And the positions of the first lens group, the third lens group, and the fifth lens group are fixed in zooming from the wide-angle end to the telephoto end.
- the second lens group and the fourth lens group move, and the fifth lens group is composed of a negative component and a positive component in order from the object side.
- a variable magnification optical system that defines a ratio to the upper thickness is disclosed.
- Japanese Patent Laid-Open No. 2008-268833 discloses, in order from the object side, a first lens group having a positive refractive power that is fixed during zooming and focusing, and a second lens having a negative refractive power that moves during zooming.
- a variable magnification optical system that defines a ratio to the focal length of the system is disclosed.
- Japanese Patent No. 4264842 includes a reflecting member for bending an optical axis passing through a plurality of lens groups, and has a positive refractive power in order from the object side to the image plane side, and the position thereof is fixed.
- a fourth lens group that corrects positional variations of the image plane during zooming and moves in the optical axis direction for focusing; and a fifth lens that has negative refractive power and whose position is fixed during zooming
- a zoom lens that defines a ratio of the focal length of the first lens group to the focal length of the entire system at the wide-angle end and a ratio of the focal length of the third lens group to the focal length of the entire system at the wide-angle end. Disclosure.
- both the zoom lens and the variable power optical system disclosed in the above-mentioned patent document have a small number of lenses constituting the lens system and a relatively short total lens length, but the zooming ratio is less than 3 times, or the comparison Although it has a high zooming ratio, the number of lenses constituting the lens system is so large that the total length of the lens is insufficiently shortened, and it cannot satisfy the recent demand for digital cameras.
- An object of the present invention is to provide a high-performance zoom lens system having a high resolution and a relatively high zooming ratio, with a small number of lenses constituting the lens system, a short overall lens length, and an imaging device including the zoom lens system, And a thin and compact camera equipped with the imaging device.
- the lens unit includes a plurality of lens groups including at least a first lens group having a positive power, a second lens group having a negative power, and a third lens group having a positive power.
- Any one of the plurality of lens groups includes a lens element having a reflecting surface that bends light rays from an object
- the first lens group and the third lens group do not move along the optical axis
- t G2 thickness of the second lens group (distance on the optical axis from the object side surface of the most object side lens element to the image side surface of the most image side lens element)
- f T focal length of the entire system at the telephoto end
- f W is the focal length of the entire system at the wide-angle end
- the present invention relates to a zoom lens system that satisfies
- the present invention An imaging apparatus capable of outputting an optical image of an object as an electrical image signal, A zoom lens system that forms an optical image of the object; An image sensor that converts an optical image formed by the zoom lens system into an electrical image signal;
- the zoom lens system is In order from the object side to the image side, the lens unit includes a plurality of lens groups including at least a first lens group having a positive power, a second lens group having a negative power, and a third lens group having a positive power.
- Any one of the plurality of lens groups includes a lens element having a reflecting surface that bends light rays from an object
- the first lens group and the third lens group do not move along the optical axis
- t G2 thickness of the second lens group (distance on the optical axis from the object side surface of the most object side lens element to the image side surface of the most image side lens element)
- f T focal length of the entire system at the telephoto end
- f W is the focal length of the entire system at the wide-angle end
- the present invention relates to an imaging apparatus that is a zoom lens system that satisfies the above.
- the present invention A camera that converts an optical image of an object into an electrical image signal, and displays and stores the converted image signal;
- An image pickup apparatus including a zoom lens system that forms an optical image of an object, and an image sensor that converts an optical image formed by the zoom lens system into an electrical image signal;
- the zoom lens system is In order from the object side to the image side, the lens unit includes a plurality of lens groups including at least a first lens group having a positive power, a second lens group having a negative power, and a third lens group having a positive power.
- Any one of the plurality of lens groups includes a lens element having a reflecting surface that bends light rays from an object
- the first lens group and the third lens group do not move along the optical axis
- t G2 thickness of the second lens group (distance on the optical axis from the object side surface of the most object side lens element to the image side surface of the most image side lens element)
- f T focal length of the entire system at the telephoto end
- f W is the focal length of the entire system at the wide-angle end
- the present invention relates to a camera that is a zoom lens system satisfying the above.
- the lens unit includes a plurality of lens groups including at least a first lens group having a positive power, a second lens group having a negative power, and a third lens group having a positive power.
- Any one of the plurality of lens groups includes a lens element having a reflecting surface that bends light rays from an object
- the first lens group and the third lens group do not move along the optical axis
- (a) (here, t L1 : center thickness of the most object side lens element of the first lens group, f T : focal length of the entire system at the telephoto end, f W is the focal length of the entire system at the wide-angle end)
- the present invention relates to a zoom lens system that satisfies
- the present invention An imaging apparatus capable of outputting an optical image of an object as an electrical image signal, A zoom lens system that forms an optical image of the object; An image sensor that converts an optical image formed by the zoom lens system into an electrical image signal;
- the zoom lens system is In order from the object side to the image side, the lens unit includes a plurality of lens groups including at least a first lens group having a positive power, a second lens group having a negative power, and a third lens group having a positive power.
- Any one of the plurality of lens groups includes a lens element having a reflecting surface that bends light rays from an object
- the first lens group and the third lens group do not move along the optical axis
- (a) (here, t L1 : center thickness of the most object side lens element of the first lens group, f T : focal length of the entire system at the telephoto end, f W is the focal length of the entire system at the wide-angle end)
- the present invention relates to an imaging apparatus that is a zoom lens system that satisfies the above.
- the present invention A camera that converts an optical image of an object into an electrical image signal, and displays and stores the converted image signal;
- An image pickup apparatus including a zoom lens system that forms an optical image of an object, and an image sensor that converts an optical image formed by the zoom lens system into an electrical image signal;
- the zoom lens system is In order from the object side to the image side, the lens unit includes a plurality of lens groups including at least a first lens group having a positive power, a second lens group having a negative power, and a third lens group having a positive power.
- Any one of the plurality of lens groups includes a lens element having a reflecting surface that bends light rays from an object
- the first lens group and the third lens group do not move along the optical axis
- (a) (here, t L1 : center thickness of the most object side lens element of the first lens group, f T : focal length of the entire system at the telephoto end, f W is the focal length of the entire system at the wide-angle end)
- the present invention relates to a camera that is a zoom lens system satisfying the above.
- a high-performance zoom lens system having a high resolution and a relatively high zooming ratio and having a small number of lenses constituting the lens system, a short overall lens length, and an imaging apparatus including the zoom lens system,
- a thin and compact camera including the imaging device can be provided.
- FIG. 1 is a lens arrangement diagram illustrating an infinitely focused state of the zoom lens system according to Embodiment 1 (Example 1).
- FIG. 2 is a longitudinal aberration diagram of the zoom lens system according to Example 1 when the zoom lens system is in focus at infinity.
- FIG. 3 is a lateral aberration diagram in a basic state where image blur correction is not performed and in an image blur correction state at the telephoto end of the zoom lens system according to Example 1.
- FIG. 4 is a lens arrangement diagram illustrating an infinitely focused state of the zoom lens system according to Embodiment 2 (Example 2).
- FIG. 5 is a longitudinal aberration diagram of the zoom lens system according to Example 2 when the zoom lens system is in focus at infinity.
- FIG. 5 is a longitudinal aberration diagram of the zoom lens system according to Example 2 when the zoom lens system is in focus at infinity.
- FIG. 6 is a lateral aberration diagram in a basic state where image blur correction is not performed and in an image blur correction state at the telephoto end of the zoom lens system according to Example 2.
- FIG. 7 is a lens arrangement diagram illustrating an infinitely focused state of the zoom lens system according to Embodiment 3 (Example 3).
- FIG. 8 is a longitudinal aberration diagram of the zoom lens system according to Example 3 when the zoom lens system is in focus at infinity.
- FIG. 9 is a lateral aberration diagram in a basic state where image blur correction is not performed and in an image blur correction state at the telephoto end of the zoom lens system according to Example 3.
- FIG. 10 is a lens layout diagram illustrating an infinitely focused state of the zoom lens system according to Embodiment 4 (Example 4).
- FIG. 11 is a longitudinal aberration diagram of the zoom lens system according to Example 4 when the zoom lens system is in focus at infinity.
- FIG. 12 is a lateral aberration diagram in a basic state where image blur correction is not performed and in an image blur correction state at the telephoto end of a zoom lens system according to Example 4.
- FIG. 13 is a lens arrangement diagram illustrating an infinitely focused state of the zoom lens system according to Embodiment 5 (Example 5).
- FIG. 14 is a longitudinal aberration diagram of the zoom lens system according to Example 5 when the zoom lens system is in focus at infinity.
- FIG. 15 is a lateral aberration diagram in a basic state where image blur correction is not performed and in an image blur correction state at the telephoto end of a zoom lens system according to Example 5.
- FIG. 12 is a lateral aberration diagram in a basic state where image blur correction is not performed and in an image blur correction state at the telephoto end of a zoom lens system according to Example 4.
- FIG. 12 is a lateral
- FIG. 16 is a lens arrangement diagram illustrating an infinitely focused state of the zoom lens system according to Embodiment 6 (Example 6).
- FIG. 17 is a longitudinal aberration diagram of the zoom lens system according to Example 6 at an infinite focus state.
- FIG. 18 is a lateral aberration diagram in a basic state where image blur correction is not performed and in an image blur correction state at the telephoto end of a zoom lens system according to Example 6.
- FIG. 19 is a schematic configuration diagram of a digital still camera according to the seventh embodiment.
- 1, 4, 7, 10, 13, and 16 each represent a zoom lens system in an infinitely focused state.
- the lens configuration of T )) and (c) show the lens configuration at the telephoto end (longest focal length state: focal length f T ).
- the broken line arrows provided between FIGS. (A) and (b) are obtained by connecting the positions of the lens groups in the wide-angle end, the intermediate position, and the telephoto end in order from the top. Straight line.
- the arrow attached to the lens group represents the focusing from the infinite focus state to the close object focus state. That is, the moving direction during focusing from the infinitely focused state to the close object focused state is shown.
- the zoom lens system includes, in order from the object side to the image side, a first lens group G1 having a positive power, a second lens group G2 having a negative power, and a first lens group having a positive power.
- 3 lens group G3, 4th lens group G4 which has positive power, and 5th lens group G5 which has negative power are provided.
- the second lens element L2 (prism) in the first lens group G1 corresponds to a lens element that has a reflecting surface that bends light rays from the object, for example, bends an axial principal ray from the object by approximately 90 °. The position is omitted.
- the lens element having a reflective surface is a prism, but the lens element having the reflective surface may be, for example, a mirror element.
- the prisms arranged in the zoom lens system according to each embodiment are both flat on the entrance surface and the exit surface, but at least one of the entrance surface and the exit surface depends on the lens configuration. It may be convex or concave.
- the distance between the lens groups that is, the distance between the first lens group G1 and the second lens group G2, the distance between the second lens group G2 and the third lens group G3, and the third lens group G3 and the fourth lens group G4.
- the second lens group G2 and the fourth lens group G4 are respectively in the direction along the optical axis so that the distance between the lens group G4 and the distance between the fourth lens group G4 and the fifth lens group G5 change.
- the zoom lens system according to each embodiment can reduce the size of the entire lens system while maintaining high optical performance by arranging these lens groups in a desired power arrangement.
- an asterisk * attached to a specific surface indicates that the surface is aspherical.
- a symbol (+) and a symbol ( ⁇ ) attached to a symbol of each lens group correspond to a power symbol of each lens group.
- the straight line described on the rightmost side represents the position of the image plane S, and is located on the object side of the image plane S (between the image plane S and the most image side lens surface of the fifth lens group G5).
- a parallel plate P equivalent to an optical low-pass filter, a face plate of an image sensor, or the like.
- an aperture stop A is provided on the most image side of the third lens group G3, that is, between the third lens group G3 and the fourth lens group G4. .
- the aperture stop A does not move on the optical axis during zooming from the wide-angle end to the telephoto end during imaging. That is, the aperture stop A is fixed to the image plane together with the third lens group G3 during zooming from the wide-angle end to the telephoto end during imaging.
- the first lens group G1 is a negative meniscus first lens element L1 having a convex surface directed toward the object side in order from the object side to the image side.
- a second lens element L2 (prism) that is flat on both the incident surface and the output surface and has a reflecting surface, and a biconvex third lens element L3.
- the third lens element L3 has two aspheric surfaces.
- the second lens group G2 includes, in order from the object side to the image side, a biconcave fourth lens element L4, a biconcave fifth lens element L5, and an object And a positive meniscus sixth lens element L6 with a convex surface facing the side.
- the fifth lens element L5 and the sixth lens element L6 are cemented.
- the third lens unit G3 comprises solely a bi-convex seventh lens element L7.
- the seventh lens element L7 has an aspheric object side surface.
- the fourth lens unit G4 includes, in order from the object side to the image side, a biconvex eighth lens element L8 and a negative meniscus shape having a convex surface directed toward the object side. And a ninth lens element L9. Among these, the ninth lens element L9 has two aspheric surfaces.
- the fifth lens unit G5 includes, in order from the object side to the image side, a biconcave tenth lens element L10 and a biconvex eleventh lens element L11. Become. Among these, the eleventh lens element L11 has an aspheric object side surface.
- a parallel plate P is provided on the object side of the image plane S (between the image plane S and the eleventh lens element L11).
- the zoom lens system according to Embodiment 1 during zooming from the wide-angle end to the telephoto end during imaging, the second lens group G2 moves substantially monotonically to the image side, and the fourth lens group G4 is substantially
- the first lens group G1, the third lens group G3, and the fifth lens group G5 are monotonously moved toward the object side, and are fixed with respect to the image plane. That is, during zooming, the distance between the first lens group G1 and the second lens group G2 and the distance between the fourth lens group G4 and the fifth lens group G5 are increased, and the second lens group G2 and the third lens group G3 And the second lens group G2 and the fourth lens group G4 move along the optical axis so that the distance between the third lens group G3 and the fourth lens group G4 decreases.
- the first lens unit G1 includes a negative meniscus first lens element L1 having a convex surface directed toward the object side in order from the object side to the image side. And a second lens element L2 (prism) that is flat on both the incident surface and the output surface and has a reflecting surface, and a biconvex third lens element L3.
- the third lens element L3 has two aspheric surfaces.
- the second lens group G2 includes, in order from the object side to the image side, a biconcave fourth lens element L4, a biconcave fifth lens element L5, and an object And a positive meniscus sixth lens element L6 with a convex surface facing the side.
- the fifth lens element L5 and the sixth lens element L6 are cemented.
- the third lens unit G3 comprises solely a bi-convex seventh lens element L7.
- the seventh lens element L7 has an aspheric object side surface.
- the fourth lens unit G4 includes, in order from the object side to the image side, a biconvex eighth lens element L8 and a negative meniscus shape having a convex surface directed toward the object side. And a ninth lens element L9. Among these, the ninth lens element L9 has two aspheric surfaces.
- the fifth lens unit G5 includes, in order from the object side to the image side, a biconcave tenth lens element L10 and a biconvex eleventh lens element L11. Become. Among these, the eleventh lens element L11 has an aspheric object side surface.
- a parallel plate P is provided on the object side of the image plane S (between the image plane S and the eleventh lens element L11).
- the zoom lens system according to Embodiment 2 during zooming from the wide-angle end to the telephoto end during imaging, the second lens group G2 moves substantially monotonically to the image side, and the fourth lens group G4 is substantially
- the first lens group G1, the third lens group G3, and the fifth lens group G5 are monotonously moved toward the object side, and are fixed with respect to the image plane. That is, during zooming, the distance between the first lens group G1 and the second lens group G2 and the distance between the fourth lens group G4 and the fifth lens group G5 are increased, and the second lens group G2 and the third lens group G3 And the second lens group G2 and the fourth lens group G4 move along the optical axis so that the distance between the third lens group G3 and the fourth lens group G4 decreases.
- the first lens group G1 is a negative meniscus first lens element L1 having a convex surface directed toward the object side in order from the object side to the image side.
- a second lens element L2 (prism) that is flat on both the incident surface and the output surface and has a reflecting surface, and a biconvex third lens element L3.
- the third lens element L3 has two aspheric surfaces.
- the second lens unit G2 includes, in order from the object side to the image side, a biconcave fourth lens element L4, a biconcave fifth lens element L5, and an object And a positive meniscus sixth lens element L6 with a convex surface facing the side.
- the fifth lens element L5 and the sixth lens element L6 are cemented.
- the third lens unit G3 comprises solely a bi-convex seventh lens element L7.
- the seventh lens element L7 has an aspheric object side surface.
- the fourth lens unit G4 includes, in order from the object side to the image side, a biconvex eighth lens element L8 and a negative meniscus shape having a convex surface directed toward the object side. And a ninth lens element L9. Among these, the ninth lens element L9 has two aspheric surfaces.
- the fifth lens unit G5 includes, in order from the object side to the image side, a biconcave tenth lens element L10 and a biconvex eleventh lens element L11. Become. Among these, the eleventh lens element L11 has an aspheric object side surface.
- a parallel plate P is provided on the object side of the image plane S (between the image plane S and the eleventh lens element L11).
- the zoom lens system according to Embodiment 3 during zooming from the wide-angle end to the telephoto end during imaging, the second lens group G2 moves substantially monotonically to the image side, and the fourth lens group G4 is substantially
- the first lens group G1, the third lens group G3, and the fifth lens group G5 are monotonously moved toward the object side, and are fixed with respect to the image plane. That is, during zooming, the distance between the first lens group G1 and the second lens group G2 and the distance between the fourth lens group G4 and the fifth lens group G5 are increased, and the second lens group G2 and the third lens group G3 And the second lens group G2 and the fourth lens group G4 move along the optical axis so that the distance between the third lens group G3 and the fourth lens group G4 decreases.
- the first lens unit G1 includes, in order from the object side to the image side, a negative meniscus first lens element L1 having a convex surface directed toward the object side. And a second lens element L2 (prism) that is flat on both the incident surface and the output surface and has a reflecting surface, and a biconvex third lens element L3.
- the third lens element L3 has two aspheric surfaces.
- the second lens group G2 includes, in order from the object side to the image side, a biconcave fourth lens element L4, a biconcave fifth lens element L5, and both Consists of a convex sixth lens element L6.
- the fifth lens element L5 and the sixth lens element L6 are cemented.
- the third lens unit G3 comprises solely a bi-convex seventh lens element L7.
- the seventh lens element L7 has an aspheric object side surface.
- the fourth lens unit G4 includes, in order from the object side to the image side, a biconvex eighth lens element L8 and a biconcave ninth lens element L9. Become. Among these, the ninth lens element L9 has two aspheric surfaces.
- the fifth lens unit G5 includes, in order from the object side to the image side, a negative meniscus tenth lens element L10 with a convex surface facing the object side, and a convex surface facing the object side And the eleventh lens element L11 having a positive meniscus shape.
- the eleventh lens element L11 has two aspheric surfaces.
- a parallel plate P is provided on the object side of the image plane S (between the image plane S and the eleventh lens element L11).
- the zoom lens system according to Embodiment 4 during zooming from the wide-angle end to the telephoto end during imaging, the second lens group G2 moves substantially monotonically to the image side, and the fourth lens group G4 is substantially
- the first lens group G1, the third lens group G3, and the fifth lens group G5 are monotonously moved toward the object side, and are fixed with respect to the image plane. That is, during zooming, the distance between the first lens group G1 and the second lens group G2 and the distance between the fourth lens group G4 and the fifth lens group G5 are increased, and the second lens group G2 and the third lens group G3 And the second lens group G2 and the fourth lens group G4 move along the optical axis so that the distance between the third lens group G3 and the fourth lens group G4 decreases.
- the first lens unit G1 includes, in order from the object side to the image side, a negative meniscus first lens element L1 having a convex surface directed toward the object side. And a second lens element L2 (prism) that is flat on both the incident surface and the output surface and has a reflecting surface, and a biconvex third lens element L3.
- the third lens element L3 has two aspheric surfaces.
- the second lens unit G2 includes, in order from the object side to the image side, a biconcave fourth lens element L4, a biconcave fifth lens element L5, and an object And a positive meniscus sixth lens element L6 with a convex surface facing the side.
- the fifth lens element L5 and the sixth lens element L6 are cemented.
- the third lens unit G3 comprises solely a bi-convex seventh lens element L7.
- the seventh lens element L7 has an aspheric object side surface.
- the fourth lens unit G4 includes, in order from the object side to the image side, a biconvex eighth lens element L8 and a negative meniscus shape having a convex surface directed toward the object side. And a ninth lens element L9. Among these, the ninth lens element L9 has two aspheric surfaces.
- the fifth lens unit G5 has, in order from the object side to the image side, a biconcave tenth lens element L10 and a positive meniscus shape having a convex surface directed toward the object side. And an eleventh lens element L11. Among these, the eleventh lens element L11 has two aspheric surfaces.
- a parallel plate P is provided on the object side of the image plane S (between the image plane S and the eleventh lens element L11).
- the zoom lens system according to Embodiment 5 during zooming from the wide-angle end to the telephoto end during imaging, the second lens group G2 moves substantially monotonically to the image side, and the fourth lens group G4 is substantially
- the first lens group G1, the third lens group G3, and the fifth lens group G5 are monotonously moved toward the object side, and are fixed with respect to the image plane. That is, during zooming, the distance between the first lens group G1 and the second lens group G2 and the distance between the fourth lens group G4 and the fifth lens group G5 are increased, and the second lens group G2 and the third lens group G3 And the second lens group G2 and the fourth lens group G4 move along the optical axis so that the distance between the third lens group G3 and the fourth lens group G4 decreases.
- the first lens unit G1 includes, in order from the object side to the image side, a negative meniscus first lens element L1 having a convex surface directed toward the object side. And a second lens element L2 (prism) that is flat on both the incident surface and the output surface and has a reflecting surface, and a biconvex third lens element L3.
- the third lens element L3 has two aspheric surfaces.
- the second lens unit G2 includes, in order from the object side to the image side, a biconcave fourth lens element L4, a biconcave fifth lens element L5, and an object And a positive meniscus sixth lens element L6 with a convex surface facing the side.
- the fifth lens element L5 and the sixth lens element L6 are cemented.
- the third lens unit G3 comprises solely a bi-convex seventh lens element L7.
- the seventh lens element L7 has an aspheric object side surface.
- the fourth lens unit G4 includes, in order from the object side to the image side, a biconvex eighth lens element L8 and a negative meniscus shape having a convex surface directed toward the object side. And a ninth lens element L9. Among these, the ninth lens element L9 has two aspheric surfaces.
- the fifth lens unit G5 has, in order from the object side to the image side, a biconcave tenth lens element L10 and a positive meniscus shape having a convex surface directed toward the object side. And an eleventh lens element L11. Among these, the eleventh lens element L11 has two aspheric surfaces.
- a parallel plate P is provided on the object side of the image plane S (between the image plane S and the eleventh lens element L11).
- the zoom lens system according to Embodiment 6 during zooming from the wide-angle end to the telephoto end during imaging, the second lens group G2 moves substantially monotonically to the image side, and the fourth lens group G4 is substantially
- the first lens group G1, the third lens group G3, and the fifth lens group G5 are monotonously moved toward the object side, and are fixed with respect to the image plane. That is, during zooming, the distance between the first lens group G1 and the second lens group G2 and the distance between the fourth lens group G4 and the fifth lens group G5 are increased, and the second lens group G2 and the third lens group G3 And the second lens group G2 and the fourth lens group G4 move along the optical axis so that the distance between the third lens group G3 and the fourth lens group G4 decreases.
- the entire lens system is composed of 11 lens elements, as will be described later, for example, while having a relatively high zooming ratio exceeding 3.5 times,
- the lens system has a very short overall lens length.
- the first lens group G1 has a reflecting surface that can bend the light beam from the object, for example, can bend the axial principal ray from the object by approximately 90 °. Since the second lens element L2 (prism) is included, the zoom lens system can be made thin in the optical axis direction of the axial ray from the object in the imaging state.
- the first lens group G1 does not move along the optical axis during zooming from the wide-angle end to the telephoto end during imaging, so that the zoom lens system is housed.
- the lens barrel a lens barrel that does not change its shape due to zooming can be used, and a camera with a high degree of freedom in shape and excellent impact resistance can be manufactured.
- the third lens group G3 does not move along the optical axis during zooming from the wide-angle end to the telephoto end during imaging, so there are few movable lens groups, The lens barrel configuration can be facilitated.
- the fourth lens group G4 includes one lens element having positive power and one lens element having negative power in order from the object side to the image side.
- the lens element having a positive power and the lens element having a negative power are arranged with an air gap therebetween, and thus the fourth lens group G4 has a high degree of freedom in configuration, and the fourth lens The aberration correction capability of group G4 can be improved.
- the aperture stop A is disposed on the image side of the third lens group G3, that is, between the third lens group G3 and the fourth lens group G4.
- the amount of movement of the second lens group G2 can be increased as compared with the case where the aperture stop A is disposed between the second lens group G2 and the third lens group G3, and is particularly effective for correcting curvature of field at the wide angle end. .
- the zoom lens systems according to Embodiments 1 to 6 have a five-group configuration including the first lens group G1 to the fifth lens group G5, as long as the first lens group G1 to the third lens group G3 are included.
- the number of lens groups constituting the zoom lens system is not particularly limited. For example, a four-group configuration including the first lens group G1 to the fourth lens group G4 may be used.
- the fourth lens group G4 has positive power and the fifth lens group G5 has negative power, but the third lens group G3 has an image side.
- the power of these arranged lens groups is not particularly limited, and the fourth lens group G4 has a positive power and the fifth lens group G5 has a positive power configuration, and the fourth lens group G4 has a negative power.
- the fifth lens group G5 may have a positive power configuration, or the fourth lens group G4 may have a negative power and the fifth lens group G5 may have a negative power configuration.
- any one of the first lens group G1, the second lens group G2, the third lens group G3, the fourth lens group G4, and the fifth lens group G5 is used.
- image point movement due to vibration of the entire system is corrected, that is, image blur due to camera shake, vibration, etc. Can be optically corrected.
- the lens elements constituting the fifth lens group G5 move in a direction perpendicular to the optical axis, thereby suppressing the enlargement of the entire zoom lens system and compact. With this configuration, it is possible to correct image blur while maintaining excellent imaging characteristics with small decentration coma and decentering astigmatism.
- one lens group is composed of a plurality of lens elements
- a part of the sub-lens groups of each lens group is any one of the plurality of lens elements or adjacent to each other.
- a zoom lens system such as the zoom lens systems according to Embodiments 1 to 6
- a plurality of preferable conditions are defined for the zoom lens system according to each embodiment, but a zoom lens system configuration that satisfies all of the plurality of conditions is most desirable.
- individual conditions it is possible to obtain a zoom lens system that exhibits the corresponding effects.
- the first lens unit and the third lens unit do not move along the optical axis (hereinafter, this lens configuration is referred to as a basic configuration of the embodiment). The following conditions (1) and (a) are satisfied.
- t G2 thickness of the second lens group (distance on the optical axis from the object side surface of the most object side lens element to the image side surface of the most image side lens element), f T : focal length of the entire system at the telephoto end, f W : The focal length of the entire system at the wide angle end.
- the condition (1) defines the thickness of the second lens group on the optical axis. If the lower limit of the condition (1) is not reached, it becomes difficult to control distortion at the wide angle end. On the other hand, if the upper limit of condition (1) is exceeded, the diameter of the first lens group will increase, making it difficult to achieve compactness. In addition, the lens element becomes too thin, making it difficult to manufacture.
- the above effect can be further achieved by satisfying at least one of the following conditions (1) ′ and (1) ′′. 4.80 ⁇ (f W ⁇ f T ) / t G2 (1) ′ ⁇ (f W ⁇ f T ) / t G2 ⁇ 7.00 (1) ''
- the conditions (1), (1) ′ and (1) ′′ are more preferably satisfied under the following condition (a) ′. f T / f W > 3.6 (a) ′
- the zoom lens system having the basic configuration like the zoom lens systems according to Embodiments 1 to 6 satisfies the following conditions (2) and (a). 11.4 ⁇ f W / t L1 ⁇ 700.0 (2) f T / f W> 2.5 ⁇ (a) here, t L1 : center thickness of the most object side lens element of the first lens group, f T : focal length of the entire system at the telephoto end, f W : The focal length of the entire system at the wide angle end.
- the condition (2) defines the thickness on the optical axis of the lens element located on the most object side among the lens elements constituting the first lens group. Below the lower limit of condition (2), it becomes difficult to control field curvature and astigmatism at the telephoto end. On the contrary, if the upper limit of the condition (2) is exceeded, it becomes difficult to control the variation of the field curvature and astigmatism accompanying zooming. In addition, the lens element becomes too thin, making it difficult to manufacture.
- the above effect can be further achieved by further satisfying at least one of the following conditions (2) ′ and (2) ′′. 19.0 ⁇ f W / t L1 (2) ′ f W / t L1 ⁇ 150.0 (2) ''
- the conditions (2), (2) ′ and (2) ′′ are more preferably satisfied under the following condition (a) ′. f T / f W > 3.6 (a) ′
- the zoom lens system having the basic configuration and including the fourth lens group having power on the image side of the third lens group configures the fourth lens group. It is preferable that at least one of all the lens elements to satisfy the following condition (4). 70 ⁇ d 4 (4) here, ⁇ d 4 : Abbe number with respect to the d-line of the lens elements constituting the fourth lens group.
- the condition (4) defines the Abbe number with respect to the d-line of the lens elements constituting the fourth lens group, and at least one of all the lens elements constituting the fourth lens group satisfies this condition (4). Is preferably satisfied. If the lower limit of condition (4) is not reached, it may be difficult to control the variation of longitudinal chromatic aberration associated with zooming.
- the zoom lens system having the basic configuration and including the fourth lens unit having power on the image side of the third lens unit has the following condition (5) And (a) are preferably satisfied.
- the condition (5) defines appropriate focal lengths of the second lens group and the fourth lens group. If the lower limit of the condition (5) is not reached, the contribution of the fourth lens group to the aberration correction becomes too large, and it may be difficult to control the variation of spherical aberration caused by zooming. On the contrary, if the upper limit of the condition (5) is exceeded, the contribution of the second lens group to the aberration correction becomes too large, and it may be difficult to control astigmatism and distortion at the wide angle end.
- the above effect can be further achieved by satisfying at least one of the following conditions (5) ′ and (5) ′′. ⁇ 0.50 ⁇ f G2 / f G4 (5) ′ f G2 / f G4 ⁇ 0.40 (5) ′′
- Each lens group constituting the zoom lens system according to Embodiments 1 to 6 includes a refractive lens element that deflects incident light by refraction (that is, a type in which deflection is performed at an interface between media having different refractive indexes)
- a diffractive lens element that deflects incident light by diffraction a refractive / diffractive hybrid lens element that deflects incident light by a combination of diffractive action and refractive action, and a refractive index that deflects incident light according to the refractive index distribution in the medium
- Each lens group may be composed of a distributed lens element or the like.
- it is preferable to form a diffractive structure at the interface of media having different refractive indexes since the wavelength dependency of diffraction efficiency is improved.
- an optical low-pass filter, a face plate of an image sensor, or the like is equivalent to the object side of the image plane S (between the image plane S and the most image side lens surface of the fifth lens group G5).
- this low-pass filter a birefringent low-pass filter made of quartz or the like whose predetermined crystal axis direction is adjusted, or a required optical cutoff frequency.
- a phase-type low-pass filter or the like that achieves the characteristics by the diffraction effect can be applied.
- FIG. 19 is a schematic configuration diagram of a digital still camera according to the seventh embodiment.
- the digital still camera includes an image pickup apparatus including a zoom lens system 1 and an image pickup device 2 that is a CCD, a liquid crystal monitor 3, and a housing 4.
- the zoom lens system 1 includes a first lens group G1, a second lens group G2, a third lens group G3, an aperture stop A, a fourth lens group G4, and a fifth lens group G5. It is configured.
- the zoom lens system 1 is disposed on the front side, and the imaging element 2 is disposed on the rear side of the zoom lens system 1.
- a liquid crystal monitor 3 is disposed on the rear side of the housing 4, and an optical image of the subject by the zoom lens system 1 is formed on the image plane S.
- the zoom lens system according to Embodiment 1 for a digital still camera, it is possible to provide a small digital still camera that has a high ability to correct resolution and curvature of field and has a short overall lens length when not in use. it can.
- any of the zoom lens systems according to the second to sixth embodiments may be used instead of the zoom lens system according to the first embodiment.
- the optical system of the digital still camera shown in FIG. 19 can also be used for a digital video camera for moving images. In this case, not only a still image but also a moving image with high resolution can be taken.
- the zoom lens system according to the first to sixth embodiments is shown as the zoom lens system 1, but these zoom lens systems need to use all zooming areas. There is no. That is, a range in which the optical performance is ensured according to a desired zooming area may be cut out and used as a zoom lens system having a lower magnification than the zoom lens system described in the first to sixth embodiments.
- an imaging apparatus including the zoom lens system according to Embodiments 1 to 6 described above and an imaging element such as a CCD or CMOS is used as a monitoring camera in a mobile phone device, a PDA (Personal Digital Assistance), or a monitoring system. It can also be applied to Web cameras, in-vehicle cameras, and the like.
- the unit of length in the table is “mm”, and the unit of angle of view is “°”.
- r is a radius of curvature
- d is a surface interval
- nd is a refractive index with respect to the d line
- vd is an Abbe number with respect to the d line.
- the surface marked with * is an aspherical surface
- the aspherical shape is defined by the following equation.
- ⁇ is a conic constant
- A4, A6, A8, A10, and A12 are fourth-order, sixth-order, eighth-order, tenth-order, and twelfth-order aspheric coefficients, respectively.
- each longitudinal aberration diagram shows the aberration at the wide angle end, (b) shows the intermediate position, and (c) shows the aberration at the telephoto end.
- SA spherical aberration
- AST mm
- DIS distortion
- the vertical axis represents the F number (indicated by F in the figure)
- the solid line is the d line (d-line)
- the short broken line is the F line (F-line)
- the long broken line is the C line (C- line).
- the vertical axis represents the image height (indicated by H in the figure), the solid line represents the sagittal plane (indicated by s), and the broken line represents the meridional plane (indicated by m in the figure). is there.
- the vertical axis represents the image height (indicated by H in the figure).
- 6, 9, 12, 15 and 18 are lateral aberration diagrams at the telephoto end of the zoom lens systems according to Embodiments 1 to 6, respectively.
- the upper three aberration diagrams show the basic state where image blur correction is not performed at the telephoto end
- the lower three aberration diagrams show the most image side lens element of the fifth lens group G5 perpendicular to the optical axis. This corresponds to the image blur correction state at the telephoto end moved by a predetermined amount in the direction.
- the upper row shows the lateral aberration at the image point of 70% of the maximum image height
- the middle row shows the lateral aberration at the axial image point
- the lower row shows the lateral aberration at the image point of -70% of the maximum image height.
- the upper stage is the lateral aberration at the image point of 70% of the maximum image height
- the middle stage is the lateral aberration at the axial image point
- the lower stage is at the image point of -70% of the maximum image height.
- the horizontal axis represents the distance from the principal ray on the pupil plane
- the solid line is the d line (d-line)
- the short broken line is the F line (F-line)
- the long broken line is the C line ( C-line) characteristics.
- the meridional plane is a plane including the optical axis of the first lens group G1 and the optical axis of the fifth lens group G5.
- the amount of movement of the fifth lens group G5 in the image blur correction state in the direction perpendicular to the optical axis of the fifth lens group G5 at the telephoto end is as follows. is there.
- the image decentering amount when the shooting distance is ⁇ and the zoom lens system is tilted by 0.3 ° at the telephoto end is the above values in the direction in which the most image side lens element of the fifth lens group G5 is perpendicular to the optical axis. It is equal to the amount of image decentering when moving in parallel.
- Table 19 shows corresponding values for each condition in the zoom lens system of each numerical example.
- the zoom lens system according to the present invention is applicable to digital input devices such as a digital camera, a mobile phone device, a PDA (Personal Digital Assistance), a surveillance camera in a surveillance system, a Web camera, an in-vehicle camera, etc. It is suitable for a photographing optical system that requires high image quality.
- digital input devices such as a digital camera, a mobile phone device, a PDA (Personal Digital Assistance), a surveillance camera in a surveillance system, a Web camera, an in-vehicle camera, etc. It is suitable for a photographing optical system that requires high image quality.
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Abstract
Description
物体側から像側へと順に、正のパワーを有する第1レンズ群と、負のパワーを有する第2レンズ群と、正のパワーを有する第3レンズ群とを少なくとも含む複数のレンズ群からなり、
前記複数のレンズ群のいずれか1つのレンズ群が、物体からの光線を折り曲げる反射面を有するレンズ素子を含み、
撮像時の広角端から望遠端へのズーミングの際に、前記第1レンズ群及び第3レンズ群が光軸に沿って移動せず、
以下の条件(1)及び(a):
4.25<√(fW×fT)/tG2<10.00 ・・・(1)
fT/fW>2.5 ・・・(a)
(ここで、
tG2:第2レンズ群の厚み(最物体側レンズ素子の物体側面から最像側レンズ素子の像側面までの光軸上の距離)、
fT:望遠端での全系の焦点距離、
fW:広角端での全系の焦点距離
である)
を満足する、ズームレンズ系
に関する。
物体の光学的な像を電気的な画像信号として出力可能な撮像装置であって、
物体の光学的な像を形成するズームレンズ系と、
該ズームレンズ系により形成された光学的な像を電気的な画像信号に変換する撮像素子とを備え、
前記ズームレンズ系が、
物体側から像側へと順に、正のパワーを有する第1レンズ群と、負のパワーを有する第2レンズ群と、正のパワーを有する第3レンズ群とを少なくとも含む複数のレンズ群からなり、
前記複数のレンズ群のいずれか1つのレンズ群が、物体からの光線を折り曲げる反射面を有するレンズ素子を含み、
撮像時の広角端から望遠端へのズーミングの際に、前記第1レンズ群及び第3レンズ群が光軸に沿って移動せず、
以下の条件(1)及び(a):
4.25<√(fW×fT)/tG2<10.00 ・・・(1)
fT/fW>2.5 ・・・(a)
(ここで、
tG2:第2レンズ群の厚み(最物体側レンズ素子の物体側面から最像側レンズ素子の像側面までの光軸上の距離)、
fT:望遠端での全系の焦点距離、
fW:広角端での全系の焦点距離
である)
を満足するズームレンズ系である、撮像装置
に関する。
物体の光学的な像を電気的な画像信号に変換し、変換された画像信号の表示及び記憶の少なくとも一方を行うカメラであって、
物体の光学的な像を形成するズームレンズ系と、該ズームレンズ系により形成された光学的な像を電気的な画像信号に変換する撮像素子とを含む撮像装置を備え、
前記ズームレンズ系が、
物体側から像側へと順に、正のパワーを有する第1レンズ群と、負のパワーを有する第2レンズ群と、正のパワーを有する第3レンズ群とを少なくとも含む複数のレンズ群からなり、
前記複数のレンズ群のいずれか1つのレンズ群が、物体からの光線を折り曲げる反射面を有するレンズ素子を含み、
撮像時の広角端から望遠端へのズーミングの際に、前記第1レンズ群及び第3レンズ群が光軸に沿って移動せず、
以下の条件(1)及び(a):
4.25<√(fW×fT)/tG2<10.00 ・・・(1)
fT/fW>2.5 ・・・(a)
(ここで、
tG2:第2レンズ群の厚み(最物体側レンズ素子の物体側面から最像側レンズ素子の像側面までの光軸上の距離)、
fT:望遠端での全系の焦点距離、
fW:広角端での全系の焦点距離
である)
を満足するズームレンズ系である、カメラ
に関する。
物体側から像側へと順に、正のパワーを有する第1レンズ群と、負のパワーを有する第2レンズ群と、正のパワーを有する第3レンズ群とを少なくとも含む複数のレンズ群からなり、
前記複数のレンズ群のいずれか1つのレンズ群が、物体からの光線を折り曲げる反射面を有するレンズ素子を含み、
撮像時の広角端から望遠端へのズーミングの際に、前記第1レンズ群及び第3レンズ群が光軸に沿って移動せず、
以下の条件(2)及び(a):
11.4<fW/tL1<700.0 ・・・(2)
fT/fW>2.5 ・・・(a)
(ここで、
tL1:第1レンズ群の最物体側レンズ素子の中心厚み、
fT:望遠端での全系の焦点距離、
fW:広角端での全系の焦点距離
である)
を満足する、ズームレンズ系
に関する。
物体の光学的な像を電気的な画像信号として出力可能な撮像装置であって、
物体の光学的な像を形成するズームレンズ系と、
該ズームレンズ系により形成された光学的な像を電気的な画像信号に変換する撮像素子とを備え、
前記ズームレンズ系が、
物体側から像側へと順に、正のパワーを有する第1レンズ群と、負のパワーを有する第2レンズ群と、正のパワーを有する第3レンズ群とを少なくとも含む複数のレンズ群からなり、
前記複数のレンズ群のいずれか1つのレンズ群が、物体からの光線を折り曲げる反射面を有するレンズ素子を含み、
撮像時の広角端から望遠端へのズーミングの際に、前記第1レンズ群及び第3レンズ群が光軸に沿って移動せず、
以下の条件(2)及び(a):
11.4<fW/tL1<700.0 ・・・(2)
fT/fW>2.5 ・・・(a)
(ここで、
tL1:第1レンズ群の最物体側レンズ素子の中心厚み、
fT:望遠端での全系の焦点距離、
fW:広角端での全系の焦点距離
である)
を満足するズームレンズ系である、撮像装置
に関する。
物体の光学的な像を電気的な画像信号に変換し、変換された画像信号の表示及び記憶の少なくとも一方を行うカメラであって、
物体の光学的な像を形成するズームレンズ系と、該ズームレンズ系により形成された光学的な像を電気的な画像信号に変換する撮像素子とを含む撮像装置を備え、
前記ズームレンズ系が、
物体側から像側へと順に、正のパワーを有する第1レンズ群と、負のパワーを有する第2レンズ群と、正のパワーを有する第3レンズ群とを少なくとも含む複数のレンズ群からなり、
前記複数のレンズ群のいずれか1つのレンズ群が、物体からの光線を折り曲げる反射面を有するレンズ素子を含み、
撮像時の広角端から望遠端へのズーミングの際に、前記第1レンズ群及び第3レンズ群が光軸に沿って移動せず、
以下の条件(2)及び(a):
11.4<fW/tL1<700.0 ・・・(2)
fT/fW>2.5 ・・・(a)
(ここで、
tL1:第1レンズ群の最物体側レンズ素子の中心厚み、
fT:望遠端での全系の焦点距離、
fW:広角端での全系の焦点距離
である)
を満足するズームレンズ系である、カメラ
に関する。
図1、4、7、10、13及び16は、各々実施の形態1~6に係るズームレンズ系のレンズ配置図である。
4.25<√(fW×fT)/tG2<10.00 ・・・(1)
fT/fW>2.5 ・・・(a)
ここで、
tG2:第2レンズ群の厚み(最物体側レンズ素子の物体側面から最像側レンズ素子の像側面までの光軸上の距離)、
fT:望遠端での全系の焦点距離、
fW:広角端での全系の焦点距離
である。
4.80<√(fW×fT)/tG2 ・・・(1)’
√(fW×fT)/tG2<7.00 ・・・(1)’’
fT/fW>3.6 ・・・(a)’
11.4<fW/tL1<700.0 ・・・(2)
fT/fW>2.5 ・・・(a)
ここで、
tL1:第1レンズ群の最物体側レンズ素子の中心厚み、
fT:望遠端での全系の焦点距離、
fW:広角端での全系の焦点距離
である。
19.0<fW/tL1 ・・・(2)’
fW/tL1<150.0 ・・・(2)’’
fT/fW>3.6 ・・・(a)’
70<νd4 ・・・(4)
ここで、
νd4:第4レンズ群を構成するレンズ素子のd線に対するアッベ数
である。
80<νd4 ・・・(4)’
-0.65<fG2/fG4<-0.35 ・・・(5)
fT/fW>2.5 ・・・(a)
ここで、
fG2:第2レンズ群の合成焦点距離、
fG4:第4レンズ群の合成焦点距離、
fT:望遠端での全系の焦点距離、
fW:広角端での全系の焦点距離
である。
-0.50<fG2/fG4 ・・・(5)’
fG2/fG4<-0.40 ・・・(5)’’
fT/fW>3.6 ・・・(a)’
図19は、実施の形態7に係るデジタルスチルカメラの概略構成図である。図19において、デジタルスチルカメラは、ズームレンズ系1とCCDである撮像素子2とを含む撮像装置と、液晶モニタ3と、筐体4とから構成される。ズームレンズ系1として、実施の形態1に係るズームレンズ系が用いられている。図19において、ズームレンズ系1は、第1レンズ群G1と、第2レンズ群G2と、第3レンズ群G3と、開口絞りAと、第4レンズ群G4と、第5レンズ群G5とから構成されている。筐体4は、前側にズームレンズ系1が配置され、ズームレンズ系1の後側には、撮像素子2が配置されている。筐体4の後側に液晶モニタ3が配置され、ズームレンズ系1による被写体の光学的な像が像面Sに形成される。
実施例 移動量(mm)
1 0.223
2 0.221
3 0.269
4 0.252
5 0.268
6 0.316
数値実施例1のズームレンズ系は、図1に示した実施の形態1に対応する。数値実施例1のズームレンズ系の面データを表1に、非球面データを表2に、各種データを表3に示す。
面番号 r d nd vd
物面 ∞
1 26.40410 0.52000 1.92286 20.9
2 9.63650 2.23620
3 ∞ 8.58290 1.84666 23.8
4 ∞ 0.30000
5* 12.37600 2.85320 1.58332 59.1
6* -15.63740 可変
7 -19.52970 0.40000 1.91082 35.2
8 11.90490 0.79020
9 -27.57870 0.40000 1.69680 55.5
10 7.06240 1.01180 1.94595 18.0
11 16.47150 可変
12* 11.14720 1.20000 1.52996 55.8
13 -29.96460 0.70000
14(絞り) ∞ 可変
15 5.29370 3.32730 1.49700 81.6
16 -15.85570 0.40000
17* 180.09720 0.60000 1.58387 30.9
18* 11.01310 可変
19 -21.72660 0.40000 1.92286 20.9
20 11.46330 2.30330
21* 10.30300 1.62620 1.52996 55.8
22 -29.35040 3.75070
23 ∞ 0.80000 1.51680 64.2
24 ∞ (BF)
像面 ∞
第5面
K= 0.00000E+00, A4=-9.10248E-05, A6= 3.01897E-06, A8=-2.03901E-07
A10= 5.12339E-09, A12= 0.00000E+00
第6面
K= 0.00000E+00, A4= 2.99214E-05, A6= 2.73934E-06, A8=-1.72113E-07
A10= 4.79494E-09, A12= 0.00000E+00
第12面
K=-8.66353E-01, A4= 1.11174E-05, A6=-3.55647E-05, A8= 7.95030E-06
A10=-8.26197E-07, A12= 3.09544E-08
第17面
K= 0.00000E+00, A4=-1.94974E-03, A6= 1.32414E-04, A8=-1.10073E-05
A10= 3.18781E-07, A12= 0.00000E+00
第18面
K= 0.00000E+00, A4=-1.14750E-04, A6= 2.31259E-04, A8=-1.31423E-05
A10= 6.93486E-07, A12= 0.00000E+00
第21面
K= 0.00000E+00, A4=-1.18640E-04, A6=-7.39496E-06, A8= 6.93890E-07
A10=-2.88770E-08, A12= 0.00000E+00
ズーム比 3.76976
広角 中間 望遠
焦点距離 5.9835 11.6151 22.5565
Fナンバー 3.64227 4.14949 6.10914
画角 35.8086 18.5261 9.6354
像高 3.8000 3.9000 3.9000
BF 2.64799 2.65220 2.65212
d6 0.6000 5.0099 7.8320
d11 8.1714 3.7614 0.9394
d14 7.1831 4.6305 1.2911
d18 1.7648 4.3174 7.6568
ズームレンズ群データ
群 始面 焦点距離
1 1 16.78033
2 7 -5.53896
3 12 15.48738
4 15 11.89111
5 19 -30.59084
数値実施例2のズームレンズ系は、図4に示した実施の形態2に対応する。数値実施例2のズームレンズ系の面データを表4に、非球面データを表5に、各種データを表6に示す。
面番号 r d nd vd
物面 ∞
1 22.36320 0.30000 1.92286 20.9
2 9.40300 2.43850
3 ∞ 8.41150 1.84666 23.8
4 ∞ 0.30000
5* 13.96120 2.69350 1.58332 59.1
6* -16.32610 可変
7 -14.84640 0.30000 1.91082 35.2
8 13.34750 0.62170
9 -342.82120 0.30000 1.67790 55.5
10 5.79990 1.05230 1.92286 20.9
11 13.81180 可変
12* 11.54410 1.20000 1.52996 55.8
13 -36.88290 0.70000
14(絞り) ∞ 可変
15 5.20650 3.46800 1.49700 81.6
16 -17.46270 0.40000
17* 82.83480 0.40000 1.58387 30.9
18* 11.01620 可変
19 -18.99500 0.30000 1.92286 20.9
20 11.91710 2.32660
21* 10.44420 1.64240 1.52996 55.8
22 -28.20210 3.76040
23 ∞ 0.90000 1.51680 64.2
24 ∞ (BF)
像面 ∞
第5面
K= 0.00000E+00, A4=-7.52903E-05, A6=-4.94683E-08, A8=-2.70038E-09
A10=-9.28591E-10, A12= 0.00000E+00
第6面
K= 0.00000E+00, A4=-8.66433E-06, A6= 2.52010E-07, A8=-9.30831E-09
A10=-6.27307E-10, A12= 0.00000E+00
第12面
K=-4.87672E-01, A4= 3.31545E-05, A6=-4.50242E-05, A8= 9.12012E-06
A10=-8.77204E-07, A12= 3.09544E-08
第17面
K= 0.00000E+00, A4=-1.50830E-03, A6= 1.19286E-04, A8=-1.23897E-05
A10= 3.34977E-07, A12= 0.00000E+00
第18面
K= 0.00000E+00, A4= 5.31682E-04, A6= 2.19664E-04, A8=-1.29212E-05
A10= 6.57938E-07, A12= 0.00000E+00
第21面
K= 0.00000E+00, A4=-2.01496E-06, A6=-3.57463E-06, A8= 4.38004E-07
A10=-2.53614E-08, A12= 0.00000E+00
ズーム比 3.76923
広角 中間 望遠
焦点距離 5.9832 11.6136 22.5520
Fナンバー 3.64111 4.12567 6.10781
画角 36.5921 18.7106 9.7447
像高 3.8000 3.9000 3.9000
BF 2.64155 2.64100 2.64747
d6 0.6000 5.5737 8.7674
d11 9.1691 4.1954 1.0017
d14 6.7943 4.4212 1.2386
d18 1.7499 4.1230 7.3056
ズームレンズ群データ
群 始面 焦点距離
1 1 19.07798
2 7 -6.13820
3 12 16.73394
4 15 11.67695
5 19 -28.69707
数値実施例3のズームレンズ系は、図7に示した実施の形態3に対応する。数値実施例3のズームレンズ系の面データを表7に、非球面データを表8に、各種データを表9に示す。
面番号 r d nd vd
物面 ∞
1 23.70040 0.10000 1.92286 20.9
2 10.06790 2.50910
3 ∞ 8.54090 1.84666 23.8
4 ∞ 0.30000
5* 12.79630 2.56170 1.58332 59.1
6* -16.81380 可変
7 -17.20650 0.10000 1.91082 35.2
8 10.17870 0.84140
9 -44.69010 0.10000 1.67790 55.5
10 6.30780 0.92320 1.92286 20.9
11 23.67940 可変
12* 10.61260 1.00000 1.52996 55.8
13 -493.85680 0.70000
14(絞り) ∞ 可変
15 5.07880 3.04380 1.49700 81.6
16 -12.70520 0.40000
17* 79.76090 0.40000 1.58387 30.9
18* 9.62890 可変
19 -64.26260 0.30000 1.92286 20.9
20 10.22440 2.28140
21* 10.16120 1.37730 1.52996 55.8
22 -3172.25160 4.26230
23 ∞ 0.90000 1.51680 64.2
24 ∞ (BF)
像面 ∞
第5面
K= 0.00000E+00, A4=-7.87336E-05, A6= 5.75393E-07, A8=-9.88553E-09
A10=-1.76726E-09, A12= 0.00000E+00
第6面
K= 0.00000E+00, A4= 2.17311E-05, A6= 1.08435E-06, A8=-3.21343E-08
A10=-1.19405E-09, A12= 0.00000E+00
第12面
K=-8.72777E-01, A4=-2.80617E-05, A6=-6.76007E-06, A8= 2.55284E-06
A10=-5.19023E-07, A12= 3.09544E-08
第17面
K= 0.00000E+00, A4=-2.09144E-03, A6= 2.64690E-05, A8=-1.65026E-06
A10=-1.38451E-07, A12= 0.00000E+00
第18面
K= 0.00000E+00, A4= 2.49154E-04, A6= 1.37313E-04, A8=-3.50883E-06
A10= 2.64419E-07, A12= 0.00000E+00
第21面
K= 0.00000E+00, A4=-1.00049E-05, A6= 2.50446E-06, A8=-3.57227E-07
A10= 5.18172E-09, A12= 0.00000E+00
ズーム比 3.76912
広角 中間 望遠
焦点距離 5.9806 11.6103 22.5415
Fナンバー 3.64143 4.11412 6.11045
画角 36.0253 18.5196 9.6376
像高 3.8000 3.9000 3.9000
BF 2.63593 2.61362 2.65005
d6 0.6000 5.2965 8.7581
d11 9.0764 4.3798 0.9182
d14 5.2695 3.4100 1.2903
d18 1.8507 3.7101 5.8298
ズームレンズ群データ
群 始面 焦点距離
1 1 17.14455
2 7 -6.17207
3 12 19.61748
4 15 10.95281
5 19 -25.08442
数値実施例4のズームレンズ系は、図10示した実施の形態4に対応する。数値実施例4のズームレンズ系の面データを表10、非球面データを表11に、各種データを表12に示す。
面番号 r d nd vd
物面 ∞
1 38.58780 0.52000 1.92286 20.9
2 12.21040 1.73360
3 ∞ 8.59640 1.84666 23.8
4 ∞ 0.30000
5* 10.30130 2.62640 1.58332 59.1
6* -18.82220 可変
7 -50.78410 0.40000 1.91082 35.2
8 7.66810 1.13090
9 -10.67410 0.40000 1.75500 52.3
10 12.61930 0.99710 1.94595 18.0
11 -99.30630 可変
12* 9.72240 1.20000 1.54410 56.1
13 -67.39740 0.70000
14(絞り) ∞ 可変
15 5.73680 3.05120 1.49700 81.6
16 -19.43100 0.83310
17* -54.38730 0.60000 1.60740 27.0
18* 22.17810 可変
19 455.22650 0.40000 1.92286 20.9
20 8.00120 2.68810
21* 8.24010 1.61380 1.54410 56.1
22* 161.92230 3.75140
23 ∞ 0.90000 1.51680 64.2
24 ∞ (BF)
像面 ∞
第5面
K= 0.00000E+00, A4=-1.87045E-04, A6= 4.59316E-06, A8=-2.32580E-07
A10= 4.35310E-09, A12= 0.00000E+00
第6面
K= 0.00000E+00, A4=-2.08307E-05, A6= 6.24682E-06, A8=-2.86925E-07
A10= 5.70515E-09, A12= 0.00000E+00
第12面
K=-2.46163E+00, A4= 1.85901E-04, A6=-3.52144E-05, A8= 8.46810E-06
A10=-8.70148E-07, A12= 3.09544E-08
第17面
K= 0.00000E+00, A4=-1.64196E-03, A6= 2.07706E-04, A8=-1.64984E-05
A10= 4.12615E-07, A12= 0.00000E+00
第18面
K= 0.00000E+00, A4=-1.20394E-04, A6= 2.71174E-04, A8=-1.52348E-05
A10= 3.19840E-07, A12= 0.00000E+00
第21面
K= 0.00000E+00, A4=-1.42694E-03, A6= 6.70968E-05, A8=-4.61407E-06
A10= 1.35990E-07, A12= 0.00000E+00
第22面
K= 0.00000E+00, A4=-1.73100E-03, A6= 9.74237E-05, A8=-6.52469E-06
A10= 1.86747E-07, A12= 0.00000E+00
ズーム比 3.77255
広角 中間 望遠
焦点距離 6.5049 12.6309 24.5400
Fナンバー 3.64260 4.09772 6.11547
画角 33.7550 17.5079 9.0667
像高 3.8000 3.9000 3.9000
BF 2.65317 2.62712 2.66976
d6 0.5000 4.6252 7.7435
d11 8.0252 3.9000 0.7816
d14 6.1668 3.9649 1.7902
d18 1.6147 3.8166 5.9914
ズームレンズ群データ
群 始面 焦点距離
1 1 15.47793
2 7 -5.30941
3 12 15.70217
4 15 12.43422
5 19 -31.61097
数値実施例5のズームレンズ系は、図13に示した実施の形態5に対応する。数値実施例5のズームレンズ系の面データを表13に、非球面データを表14に、各種データを表15に示す。
面番号 r d nd vd
物面 ∞
1 25.55550 0.30000 1.92286 20.9
2 10.54410 1.98790
3 ∞ 8.56210 1.84666 23.8
4 ∞ 0.30000
5* 10.74960 2.75970 1.58332 59.1
6* -17.31600 可変
7 -29.89150 0.30000 1.91082 35.2
8 8.49950 0.99360
9 -13.66140 0.30000 1.74624 51.4
10 9.94510 0.98640 1.94595 18.0
11 115.60180 可変
12* 9.11110 1.20000 1.54410 56.1
13 -172.22630 0.70000
14(絞り) ∞ 可変
15 5.70430 3.12090 1.49700 81.6
16 -19.90500 0.55020
17* 34.48440 0.50000 1.60740 27.0
18* 11.30600 可変
19 -58.93060 0.40000 1.92286 20.9
20 10.05090 2.67540
21* 8.13110 1.53330 1.54410 56.1
22* 55.32230 3.88000
23 ∞ 0.90000 1.51680 64.2
24 ∞ (BF)
像面 ∞
第5面
K= 0.00000E+00, A4=-1.58141E-04, A6= 4.21542E-06, A8=-2.08493E-07
A10= 4.17040E-09, A12= 0.00000E+00
第6面
K= 0.00000E+00, A4=-5.91940E-06, A6= 5.64487E-06, A8=-2.54795E-07
A10= 5.28741E-09, A12= 0.00000E+00
第12面
K=-2.18268E+00, A4= 2.13258E-04, A6=-3.84942E-05, A8= 8.68021E-06
A10=-8.72920E-07, A12= 3.09544E-08
第17面
K= 0.00000E+00, A4=-1.75572E-03, A6= 1.99792E-04, A8=-1.83639E-05
A10= 4.82819E-07, A12= 0.00000E+00
第18面
K= 0.00000E+00, A4=-2.42755E-04, A6= 2.77773E-04, A8=-1.70891E-05
A10= 3.64099E-07, A12= 0.00000E+00
第21面
K= 0.00000E+00, A4=-2.22297E-03, A6= 9.72757E-05, A8=-6.21028E-06
A10= 9.78631E-08, A12= 0.00000E+00
第22面
K= 0.00000E+00, A4=-2.45616E-03, A6= 1.07548E-04, A8=-6.32138E-06
A10= 1.01831E-07, A12= 0.00000E+00
ズーム比 3.77007
広角 中間 望遠
焦点距離 6.5053 12.6297 24.5254
Fナンバー 3.64299 4.09877 6.11364
画角 33.7415 17.5731 9.1332
像高 3.8000 3.9000 3.9000
BF 2.63047 2.62999 2.66213
d6 0.5000 4.5804 7.7299
d11 8.0669 3.9864 0.8369
d14 5.9046 3.7946 1.8002
d18 1.8935 4.0035 5.9979
ズームレンズ群データ
群 始面 焦点距離
1 1 15.09547
2 7 -5.34004
3 12 15.94109
4 15 12.17035
5 19 -29.18821
数値実施例6のズームレンズ系は、図16に示した実施の形態6に対応する。数値実施例6のズームレンズ系の面データを表16に、非球面データを表17に、各種データを表18に示す。
面番号 r d nd vd
物面 ∞
1 27.76910 0.10000 1.92286 20.9
2 11.32950 1.97610
3 ∞ 8.34830 1.84666 23.8
4 ∞ 0.30000
5* 10.85960 2.46220 1.58332 59.1
6* -19.07410 可変
7 -28.03880 0.10000 1.91082 35.2
8 9.15990 0.97750
9 -14.76850 0.10000 1.74100 52.6
10 10.11630 0.99250 1.94595 18.0
11 102.87210 可変
12* 9.26710 1.00000 1.54410 56.1
13 -6373.58260 0.70000
14(絞り) ∞ 可変
15 5.61700 3.06080 1.49700 81.6
16 -20.31200 0.55660
17* 28.45320 0.50000 1.60740 27.0
18* 10.83490 可変
19 -147.14350 0.30000 1.92286 20.9
20 9.90950 2.58570
21* 8.70960 1.41380 1.54410 56.1
22* 40.74170 3.75000
23 ∞ 0.90000 1.51680 64.2
24 ∞ (BF)
像面 ∞
第5面
K= 0.00000E+00, A4=-1.16823E-04, A6= 3.39273E-06, A8=-2.13634E-07
A10= 6.92753E-09, A12= 0.00000E+00
第6面
K= 0.00000E+00, A4= 2.55031E-05, A6= 3.66985E-06, A8=-1.89258E-07
A10= 6.54397E-09, A12= 0.00000E+00
第12面
K=-1.97539E+00, A4= 2.01102E-04, A6=-4.25178E-05, A8= 9.11028E-06
A10=-8.86948E-07, A12= 3.09544E-08
第17面
K= 0.00000E+00, A4=-1.79099E-03, A6= 2.01410E-04, A8=-1.75442E-05
A10= 4.09842E-07, A12= 0.00000E+00
第18面
K= 0.00000E+00, A4=-2.27040E-04, A6= 2.87403E-04, A8=-1.61208E-05
A10= 3.16255E-07, A12= 0.00000E+00
第21面
K= 0.00000E+00, A4=-2.29092E-03, A6= 1.14682E-04, A8=-7.58009E-06
A10= 1.47169E-07, A12= 0.00000E+00
第22面
K= 0.00000E+00, A4=-2.56213E-03, A6= 1.27981E-04, A8=-7.99780E-06
A10= 1.58631E-07, A12= 0.00000E+00
ズーム比 3.77071
広角 中間 望遠
焦点距離 6.5050 12.6297 24.5284
Fナンバー 3.64180 4.08265 6.11153
画角 33.7663 17.4534 9.0442
像高 3.8000 3.9000 3.9000
BF 2.64909 2.63282 2.65564
d6 0.5000 4.7879 8.1430
d11 8.5074 4.2194 0.8643
d14 5.6300 3.6628 1.8405
d18 1.8931 3.8602 5.6825
ズームレンズ群データ
群 始面 焦点距離
1 1 15.99514
2 7 -5.65059
3 12 17.00819
4 15 11.85373
5 19 -26.35239
G2 第2レンズ群
G3 第3レンズ群
G4 第4レンズ群
G5 第5レンズ群
L1 第1レンズ素子
L2 第2レンズ素子(プリズム)
L3 第3レンズ素子
L4 第4レンズ素子
L5 第5レンズ素子
L6 第6レンズ素子
L7 第7レンズ素子
L8 第8レンズ素子
L9 第9レンズ素子
L10 第10レンズ素子
L11 第11レンズ素子
A 開口絞り
P 平行平板
S 像面
1 ズームレンズ系
2 撮像素子
3 液晶モニタ
4 筐体
Claims (20)
- 物体側から像側へと順に、正のパワーを有する第1レンズ群と、負のパワーを有する第2レンズ群と、正のパワーを有する第3レンズ群とを少なくとも含む複数のレンズ群からなり、
前記複数のレンズ群のいずれか1つのレンズ群が、物体からの光線を折り曲げる反射面を有するレンズ素子を含み、
撮像時の広角端から望遠端へのズーミングの際に、前記第1レンズ群及び第3レンズ群が光軸に沿って移動せず、
以下の条件(1)及び(a)を満足する、ズームレンズ系:
4.25<√(fW×fT)/tG2<10.00 ・・・(1)
fT/fW>2.5 ・・・(a)
ここで、
tG2:第2レンズ群の厚み(最物体側レンズ素子の物体側面から最像側レンズ素子の像側面までの光軸上の距離)、
fT:望遠端での全系の焦点距離、
fW:広角端での全系の焦点距離
である。 - 第1レンズ群が、反射面を有するレンズ素子と、各々パワーを有する2枚のレンズ素子とからなる、請求項1に記載のズームレンズ系。
- 第2レンズ群が、各々パワーを有する3枚のレンズ素子からなる、請求項1に記載のズームレンズ系。
- 第3レンズ群が、パワーを有するレンズ素子1枚のみからなる、請求項1に記載のズームレンズ系。
- 第3レンズ群の像側にパワーを有する第4レンズ群が配置され、該第4レンズ群が、物体側から像側へと順に、正のパワーを有する1枚のレンズ素子と負のパワーを有する1枚のレンズ素子とを含み、該正のパワーを有するレンズ素子と負のパワーを有するレンズ素子とが空気間隔を隔てて配置されてなる、請求項1に記載のズームレンズ系。
- 第3レンズ群の像側にパワーを有する第4レンズ群が配置され、該第4レンズ群を構成する全レンズ素子のうち、少なくとも1枚が以下の条件(4)を満足する、請求項1に記載のズームレンズ系:
70<νd4 ・・・(4)
ここで、
νd4:第4レンズ群を構成するレンズ素子のd線に対するアッベ数
である。 - 第3レンズ群の像側にパワーを有する第4レンズ群が配置され、以下の条件(5)及び(a)を満足する、請求項1に記載のズームレンズ系:
-0.65<fG2/fG4<-0.35 ・・・(5)
fT/fW>2.5 ・・・(a)
ここで、
fG2:第2レンズ群の合成焦点距離、
fG4:第4レンズ群の合成焦点距離、
fT:望遠端での全系の焦点距離、
fW:広角端での全系の焦点距離
である。 - 開口絞りが、第3レンズ群よりも像側に配置された、請求項1に記載のズームレンズ系。
- 物体の光学的な像を電気的な画像信号として出力可能な撮像装置であって、
物体の光学的な像を形成するズームレンズ系と、
該ズームレンズ系により形成された光学的な像を電気的な画像信号に変換する撮像素子とを備え、
前記ズームレンズ系が、請求項1に記載のズームレンズ系である、撮像装置。 - 物体の光学的な像を電気的な画像信号に変換し、変換された画像信号の表示及び記憶の少なくとも一方を行うカメラであって、
物体の光学的な像を形成するズームレンズ系と、該ズームレンズ系により形成された光学的な像を電気的な画像信号に変換する撮像素子とを含む撮像装置を備え、
前記ズームレンズ系が、請求項1に記載のズームレンズ系である、カメラ。 - 物体側から像側へと順に、正のパワーを有する第1レンズ群と、負のパワーを有する第2レンズ群と、正のパワーを有する第3レンズ群とを少なくとも含む複数のレンズ群からなり、
前記複数のレンズ群のいずれか1つのレンズ群が、物体からの光線を折り曲げる反射面を有するレンズ素子を含み、
撮像時の広角端から望遠端へのズーミングの際に、前記第1レンズ群及び第3レンズ群が光軸に沿って移動せず、
以下の条件(2)及び(a)を満足する、ズームレンズ系:
11.4<fW/tL1<700.0 ・・・(2)
fT/fW>2.5 ・・・(a)
ここで、
tL1:第1レンズ群の最物体側レンズ素子の中心厚み、
fT:望遠端での全系の焦点距離、
fW:広角端での全系の焦点距離
である。 - 第1レンズ群が、反射面を有するレンズ素子と、各々パワーを有する2枚のレンズ素子とからなる、請求項11に記載のズームレンズ系。
- 第2レンズ群が、各々パワーを有する3枚のレンズ素子からなる、請求項11に記載のズームレンズ系。
- 第3レンズ群が、パワーを有するレンズ素子1枚のみからなる、請求項11に記載のズームレンズ系。
- 第3レンズ群の像側にパワーを有する第4レンズ群が配置され、該第4レンズ群が、物体側から像側へと順に、正のパワーを有する1枚のレンズ素子と負のパワーを有する1枚のレンズ素子とを含み、該正のパワーを有するレンズ素子と負のパワーを有するレンズ素子とが空気間隔を隔てて配置されてなる、請求項11に記載のズームレンズ系。
- 第3レンズ群の像側にパワーを有する第4レンズ群が配置され、該第4レンズ群を構成する全レンズ素子のうち、少なくとも1枚が以下の条件(4)を満足する、請求項11に記載のズームレンズ系:
70<νd4 ・・・(4)
ここで、
νd4:第4レンズ群を構成するレンズ素子のd線に対するアッベ数
である。 - 第3レンズ群の像側にパワーを有する第4レンズ群が配置され、以下の条件(5)及び(a)を満足する、請求項11に記載のズームレンズ系:
-0.65<fG2/fG4<-0.35 ・・・(5)
fT/fW>2.5 ・・・(a)
ここで、
fG2:第2レンズ群の合成焦点距離、
fG4:第4レンズ群の合成焦点距離、
fT:望遠端での全系の焦点距離、
fW:広角端での全系の焦点距離
である。 - 開口絞りが、第3レンズ群よりも像側に配置された、請求項11に記載のズームレンズ系。
- 物体の光学的な像を電気的な画像信号として出力可能な撮像装置であって、
物体の光学的な像を形成するズームレンズ系と、
該ズームレンズ系により形成された光学的な像を電気的な画像信号に変換する撮像素子とを備え、
前記ズームレンズ系が、請求項11に記載のズームレンズ系である、撮像装置。 - 物体の光学的な像を電気的な画像信号に変換し、変換された画像信号の表示及び記憶の少なくとも一方を行うカメラであって、
物体の光学的な像を形成するズームレンズ系と、該ズームレンズ系により形成された光学的な像を電気的な画像信号に変換する撮像素子とを含む撮像装置を備え、
前記ズームレンズ系が、請求項11に記載のズームレンズ系である、カメラ。
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| CN2010800343139A CN102576146A (zh) | 2009-10-13 | 2010-10-08 | 变焦透镜系统、拍摄装置及照相机 |
| US13/393,536 US20120154524A1 (en) | 2009-10-13 | 2010-10-08 | Zoom Lens System, Imaging Device and Camera |
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| JP2009236425 | 2009-10-13 |
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| Application Number | Title | Priority Date | Filing Date |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012073308A (ja) * | 2010-09-28 | 2012-04-12 | Olympus Imaging Corp | ズームレンズおよびそれを有する電子撮像装置 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103635846B (zh) * | 2011-06-21 | 2016-03-02 | 富士胶片株式会社 | 变焦镜头和成像设备 |
| JP6071465B2 (ja) * | 2012-11-22 | 2017-02-01 | キヤノン株式会社 | ズームレンズ及びそれを有する撮像装置 |
| JP5869725B2 (ja) * | 2013-03-22 | 2016-02-24 | 富士フイルム株式会社 | ズームレンズおよび撮像装置 |
| US9395524B2 (en) * | 2013-06-10 | 2016-07-19 | Konica Minolta, Inc. | Variable magnification optical system, imaging optical device, and digital appliance |
| JP6257251B2 (ja) * | 2013-10-02 | 2018-01-10 | キヤノン株式会社 | ズームレンズ及びそれを有する撮像装置 |
| JP6300577B2 (ja) * | 2014-03-05 | 2018-03-28 | キヤノン株式会社 | ズームレンズ及びそれを有する撮像装置 |
| JP6173279B2 (ja) * | 2014-08-28 | 2017-08-02 | キヤノン株式会社 | ズームレンズ及びそれを有する撮像装置 |
| EP3422070B1 (en) * | 2016-02-24 | 2020-09-09 | Panasonic Intellectual Property Management Co., Ltd. | Zoom lens system, image pickup device having zoom lens system, and vehicle having image pickup device |
| JP6707987B2 (ja) * | 2016-05-25 | 2020-06-10 | 株式会社シグマ | 大口径防振付きズームレンズ |
| JP6685942B2 (ja) * | 2017-01-20 | 2020-04-22 | 富士フイルム株式会社 | 撮像レンズおよび撮像装置 |
| JP7243841B2 (ja) * | 2019-08-29 | 2023-03-22 | 株式会社ニコン | 変倍光学系および光学機器 |
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| US20120154524A1 (en) | 2012-06-21 |
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