CN201340475Y - Image pick-up lens and image pick-up device - Google Patents
Image pick-up lens and image pick-up device Download PDFInfo
- Publication number
- CN201340475Y CN201340475Y CNU2008201819547U CN200820181954U CN201340475Y CN 201340475 Y CN201340475 Y CN 201340475Y CN U2008201819547 U CNU2008201819547 U CN U2008201819547U CN 200820181954 U CN200820181954 U CN 200820181954U CN 201340475 Y CN201340475 Y CN 201340475Y
- Authority
- CN
- China
- Prior art keywords
- lens
- imaging
- image
- curvature
- focal length
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Landscapes
- Lenses (AREA)
Abstract
The utility model provides an image pick-up lens and an image pick-up device, which realizes miniaturization, low cost and small F number in the image pick-up lens as well as excellent optical performance. The image pick-up lens (1) sequentially comprises, from the object side: a first lens (L1) that directs a concave face towards an image side and has a minus focal power; a second lens (L2) that is a biconvex lens and has a plus focal power; a third lens (L3) that has a plus focal power; a diaphragm; a fourth lens (L4) that is a biconcave lens and has a minus focal power; a fifth lens (L5) that directs a convex face towards the image side and has a plus focal power; and a sixth lens (L6) that directs the convex face towards the object side and has a plus focal power. On the part of the second lens (L2) and the third lens (L3), curvature radius absolute values of faces of the object side and the image side are identical or smaller than that of the face of the image side. The abbe number of the second lens (L2) material to d-line is above 45, and the abbe number of the fourth lens (L4) material to d-line is below 30.
Description
Technical Field
The present invention relates to an imaging lens and an imaging Device, and more particularly, to an imaging lens suitable for use in an on-vehicle camera, a portable terminal camera, a surveillance camera, and the like, which use an imaging element such as a CCD (Charge Coupled Device) or a CMOS (Complementary Metal Oxide Semiconductor), and an imaging Device provided with the imaging lens.
Background
In recent years, image pickup devices such as CCDs and CMOSs have been increasingly downsized and have high pixels. At the same time, the size of an imaging apparatus main body including these imaging elements has been reduced, and an imaging lens mounted thereon is required to be reduced in size and weight in addition to excellent optical performance.
On the other hand, in a vehicle-mounted camera, a surveillance camera, or the like, high weather resistance is required, and a small-sized and high-performance lens is required which can be used in a wide temperature range from the atmosphere in a cold region to the inside of a vehicle in summer in a tropical region. In particular, a camera arranged in a vehicle interior and in front of a monitor is required to have a small F number so as to be usable even at night and to be usable over a wide band from a visible light region to an infrared region. When used as an in-vehicle camera, the exposed lens portion is also required to be small from the viewpoint of the appearance of the vehicle.
The present applicant proposed an imaging lens usable in the above-mentioned field in japanese patent application No. 2007-132334. Further, as an imaging lens having a 6-piece structure known in the past, there are lenses described in patent documents 1 to 4 below. Patent document 1 describes a lens arrangement having negative, positive, aperture, negative, positive, and positive lenses in this order from the object side. Patent document 2 describes a lens arrangement having negative, positive, aperture, negative, positive, and negative in order from the object side. Patent document 3 describes a lens arrangement having a negative, positive, diaphragm, positive, negative, positive, and positive lens in this order from the object side. Patent document 4 describes a lens arrangement having negative, positive, aperture, negative, positive, and positive lenses in this order from the object side.
Patent document 1: japanese patent laid-open publication No. 55-45007
Patent document 2: japanese patent laid-open publication No. 61-90115
Patent document 3: japanese patent laid-open publication No. 9-230232
Patent document 4: japanese patent laid-open publication No. 2005-164839
However, since it is also conceivable to use a vehicle-mounted camera, a monitoring camera, or the like at night, an optical system having a small F-number is required. However, patent documents 1 and 2 disclose that the F number is preferably as large as 3.3 to 4.5, in other words, a dark optical system. Patent document 4 also discloses that the F number is 2.5, which leaves room for improvement and is disadvantageous in terms of cost because an aspherical lens is used.
SUMMERY OF THE UTILITY MODEL
In view of the above circumstances, an object of the present invention is to provide an imaging lens that is small in size, has a small F number, is low in cost, and has good optical performance, and an imaging device including the imaging lens.
The utility model discloses a camera lens, characterized by, possess the 1 st lens with negative focal power that faces the concave surface to the image side from the object side in proper order, be biconvex lens and have the 2 nd lens of positive focal power, have the 3 rd lens of positive focal power, diaphragm, be biconcave lens and have the 4 th lens of negative focal power, face the 5 th lens with positive focal power that the convex surface is faced the image side, and face the 6 th lens with positive focal power that the convex surface is faced the object side; the absolute value of the curvature radius of the object-side surface of the 2 nd lens is equal to or smaller than the absolute value of the curvature radius of the image-side surface, the absolute value of the curvature radius of the object-side surface of the 3 rd lens is equal to or smaller than the absolute value of the curvature radius of the image-side surface, the abbe number of the material of the 2 nd lens to the d-line is 45 or more, and the abbe number of the material of the 4 th lens to the d-line is 30 or less.
The imaging lens of the present invention is advantageous in obtaining an optical system having a small size, a small F number, and good optical performance by appropriately selecting the structure of each lens as described above, and can realize a low cost because the structure may not necessarily use an aspherical surface. In particular, the imaging lens of the present invention is advantageous in that the object-side surface and the image-side surface of the 2 nd and 3 rd lenses are configured as described above, so that the spherical aberration can be easily corrected, and an optical system having a small F number can be obtained. Further, by selecting the abbe numbers of the 2 nd and 4 th lenses as described above, chromatic aberration can be easily corrected, which is advantageous for achieving good optical performance.
In the imaging lens of the present invention, it is preferable that the 1 st lens element is a biconcave lens element, an absolute value of a radius of curvature of a surface on the object side is larger than an absolute value of a radius of curvature of a surface on the image side, an absolute value of a radius of curvature of a surface on the object side of the 5 th lens element is larger than an absolute value of a radius of curvature of a surface on the image side of the 5 th lens element, and an absolute value of a radius of curvature of a surface on the object side of the 6 th lens element is smaller than an.
In the imaging lens of the present invention, the following conditional expressions (1) to (7) are preferably satisfied. In a preferred embodiment, any 1 of the following conditional expressions (1) to (7) may be satisfied, or any combination thereof may be satisfied.
0.30＜f5/f6＜0.95……(1)
0.50＜f2/f3＜1.80……(2)
0.5＜R3/f＜4.0……(3)
2.0＜L/f＜7.0……(4)
0.8＜f5/f＜1.6……(5)
0.3＜|f1/f2|＜1.0……(6)
1.50＜f456/f＜2.50……(7)
Wherein,
f: focal length of the whole system
f 1: focal length of 1 st lens
f 2: focal length of 2 nd lens
f 3: focal length of the 3 rd lens
f 5: focal length of the 5 th lens
f 6: focal length of the 6 th lens
f 456: the combined focal length from the 4 th lens to the 6 th lens
R3: radius of curvature of object-side surface of 2 nd lens
L: distance on optical axis from object side surface of lens closest to object side to image plane (rear intercept part is air conversion length)
In the case of an aspherical lens, the terms "concave surface", "convex surface", "biconvex", "biconcave" and "radius of curvature" are considered in the paraxial region. The curvature radius is positive when the object side is convex, and has a negative sign when the image side is convex.
In the imaging lens of the present invention, it is preferable that the refractive index of the material of the 2 nd lens with respect to the d-line is 1.65 to 1.9.
The utility model discloses a camera device, its characterized in that possesses the above-mentioned record the utility model discloses a lens of making a video recording.
According to the present invention, in the lens system composed of at least 6 lenses, the configuration of the shape, power, material, and the like of each lens is appropriately set, so that it is possible to provide an imaging lens which is small in size, small in F number, low in cost, and capable of obtaining excellent optical performance, and an imaging apparatus including the imaging lens.
Drawings
Fig. 1 is an optical path diagram of an imaging lens according to an embodiment of the present invention.
Fig. 2 is a sectional view showing a lens structure of an imaging lens according to embodiment 1 of the present invention.
Fig. 3 is a sectional view showing a lens structure of an imaging lens according to embodiment 2 of the present invention.
Fig. 4 is a sectional view showing a lens structure of an imaging lens according to embodiment 3 of the present invention.
Fig. 5 is a sectional view showing a lens structure of an imaging lens according to embodiment 4 of the present invention.
Fig. 6 is a sectional view showing a lens structure of an imaging lens according to example 5 of the present invention.
Fig. 7 is a sectional view showing a lens structure of an imaging lens according to example 6 of the present invention.
Fig. 8 is a sectional view showing a lens structure of an imaging lens according to example 7 of the present invention.
Fig. 9(a) to 9(D) are aberration diagrams of the imaging lens according to example 1 of the present invention.
Fig. 10(a) to 10(D) are aberration diagrams of the imaging lens according to example 2 of the present invention.
Fig. 11(a) to 11(D) are aberration diagrams of the imaging lens according to example 3 of the present invention.
Fig. 12(a) to 12(D) are aberration diagrams of the imaging lens according to example 4 of the present invention.
Fig. 13(a) to 13(D) are aberration diagrams of the imaging lens according to example 5 of the present invention.
Fig. 14(a) to 14(D) are aberration diagrams of the imaging lens according to example 6 of the present invention.
Fig. 15(a) to 15(D) are aberration diagrams of the imaging lens according to example 7 of the present invention.
Fig. 16 is a diagram for explaining the arrangement of the in-vehicle imaging device according to the embodiment of the present invention.
In the figure:
1-imaging lens, 2-on-axis beam, 3, 4-off-axis beam, 5-imaging element, 11, 12-shading mechanism, 100-car, 101, 102-outside camera, 103-inside camera, Di (i ═ 1, 2, 3, …) plane spacing on the optical axis between the i-th and i + 1-th planes, Pim-imaging position, L1-1 St lens, L2-2 nd lens, L3-3 rd lens, L4-4 th lens, L5-5 th lens, L6-6 th lens, PP-optical component, Ri (i ═ 1, 2, 3, …) -curvature radius of the i-th plane, St-aperture stop, Z-optical axis.
Detailed Description
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. First, an embodiment of the imaging lens of the present invention will be described, and then an embodiment of the imaging device will be described.
Fig. 1 is a lens cross-sectional view of an imaging lens 1 according to an embodiment of the present invention. In fig. 1, the left side and the right side of the figure are the object side and the image side, and the on-axis light flux 2 from an object point at an infinite distance and the off-axis light fluxes 3 and 4 at the maximum angle of view are also shown. Here, the on-axis beam refers to a beam from an object point on the optical axis Z, and the off-axis beam is a beam from an object point outside the optical axis Z.
In fig. 1, in consideration of the case where the imaging lens 1 is applied to an imaging apparatus, an imaging element 5 arranged on an image plane including an imaging position Pim of the imaging lens 1 is also illustrated. The imaging element 5 converts an optical image formed by the imaging lens 1 into an electric signal, and is configured by, for example, a CCD image sensor or the like.
Fig. 1 also shows a parallel flat plate-shaped optical member PP disposed between the lens system and the imaging element 5 (image plane), and light blocking mechanisms 11 and 12 disposed on the image-side surfaces of the 1 st lens L1 and the 2 nd lens L2. The optical member PP and the light shielding mechanisms 11 and 12 are not essential to the present invention, and therefore these will be described later.
The imaging lens 1 includes, in order from the object side, a 1 St lens L1 having a negative refractive power with a concave surface facing the image side, a 2 nd lens L2 being a biconvex lens and having a positive refractive power, a 3 rd lens L3 having a positive refractive power, an aperture stop St, a 4 th lens L4 being a biconcave lens and having a negative refractive power, a 5 th lens L5 having a positive refractive power with a convex surface facing the image side, and a 6 th lens L6 having a positive refractive power with a convex surface facing the object side. The imaging lens 1 is constituted by a relatively small number of lenses, i.e., a minimum of 6 lenses, and the total length in the optical axis direction can be reduced. Further, the aperture stop St in fig. 1 does not indicate the shape and size, but indicates the position on the optical axis Z.
The 1 st lens L1 is a lens having a concave surface facing the image side and negative refractive power, and can make the entire system wide-angle. The 1 st lens L1 is a lens having a concave surface facing the image side and having negative refractive power, and can refract off-axis light in the optical axis direction and can reduce the size of the lens system in the radial direction. Further, as in the example shown in fig. 1, when the 1 st lens L1 is a biconcave lens, the negative refractive power of the 1 st lens L1 can be increased, and the radial direction of the lens system can be more easily reduced in size.
In the 1 st lens L1, the absolute value of the radius of curvature of the object-side surface is preferably larger than the absolute value of the radius of curvature of the image-side surface, whereby the field curvature can be corrected satisfactorily.
The abbe number of the material of the 1 st lens L1 to d-line is preferably 40 or more. This makes it possible to correct the chromatic aberration of magnification satisfactorily.
The 2 nd lens L2 and the 3 rd lens L3 are positive lenses, and thus positive power is distributed to the 2 nd lens on the object side of the aperture stop St, whereby spherical aberration (also referred to as spherical aberration) can be corrected satisfactorily. For example, even in an optical system having an F number of 2.0 or less, good optical performance can be easily achieved.
Further, the image-side surface of the 2 nd lens L2 is preferably a biconvex lens, and particularly the image-side surface thereof is a convex surface, whereby curvature of field can be corrected favorably.
The 2 nd lens L2 can correct spherical aberration more favorably by setting the absolute value of the radius of curvature of the object-side surface to be equal to or larger than the absolute value of the radius of curvature of the image-side surface.
When the abbe number of the material of the 2 nd lens L2 to the d-line is 45 or more, the chromatic aberration (also referred to as axial chromatic aberration) on the axis can be corrected well.
When the refractive index of the material of the 2 nd lens L2 with respect to the d-line is N2, N2 is preferably 1.65 to 1.9, whereby the 2 nd lens L2 can have an appropriate refractive power while ensuring the peripheral thickness (peripheral thickness of the lens). If N2 is 1.65 or less, the curvature of the surface of the 2 nd lens L2 increases and the edge thickness of the 2 nd lens L2 decreases to make the processing difficult in order to make the 2 nd lens L2 have sufficient refractive power. Alternatively, in order to avoid this problem, the lens system is increased in size by increasing the thickness of the 2 nd lens L2. If N2 is 1.9 or more, an expensive material is used, which causes an increase in cost.
The 3 rd lens L3 can correct the field curvature satisfactorily by making the object side surface convex.
The 3 rd lens L3 can correct spherical aberration more favorably by making the absolute value of the radius of curvature of the object-side surface equal to or smaller than the absolute value of the radius of curvature of the image-side surface.
Preferably, the abbe number of the material of the 3 rd lens L3 to the d-line is 40 or more. Thereby, the chromatic aberration on the axis can be corrected well.
The 4 th lens L4 can have a large negative power by being a biconcave lens.
When the abbe number of the material of the 4 th lens L4 for the d-line is 30 or less, axial chromatic aberration and chromatic aberration of magnification (also referred to as chromatic aberration of magnification) can be corrected well.
The 5 th lens L5 and the 6 th lens L6 are positive lenses, and thus positive power is dispersed to 2 lenses on the image side of the aperture stop St, whereby spherical aberration can be corrected satisfactorily. For example, even in an optical system having an F number of 2.0 or less, good optical performance can be easily achieved.
The image-side surface of the 5 th lens L5 is convex, and thus field curvature can be corrected satisfactorily.
The 5 th lens L5 makes the absolute value of the radius of curvature of the object-side surface larger than the absolute value of the radius of curvature of the image-side surface, thereby correcting the field curvature satisfactorily.
Preferably, the abbe number of the material of the 5 th lens L5 to the d-line is 40 or more. Thereby, the chromatic aberration on the axis and the chromatic aberration of magnification can be corrected well.
Since the object-side surface of the 6 th lens L6 is convex, the field curvature can be corrected satisfactorily.
In the 6 th lens L6, since the absolute value of the radius of curvature of the object-side surface is smaller than the absolute value of the radius of curvature of the image-side surface, the field curvature can be corrected well.
The abbe number of the material of the 6 th lens L6 to d-line is preferably 40 or more. Thereby, the chromatic aberration on the axis and the chromatic aberration of magnification can be corrected well.
When the refractive index of the material of the 6 th lens L6 with respect to the d-line is N6, a material of 1.75 or less may be used as the material N6 of the 6 th lens L6. When the material of 1.75 or less is used for N6, the material having a large abbe number can be selected while suppressing the price of the material of the 6 th lens L6, which is advantageous for correcting chromatic aberration.
The imaging lens according to the embodiment of the present invention preferably satisfies the following conditional expressions (1) to (13). In a preferred embodiment, any one of the conditional expressions (1) to (13) may be satisfied, or any combination thereof may be satisfied.
0.30＜f5/f6＜0.95……(1)
0.50＜f2/f3＜1.80……(2)
0.5＜R3/f＜4.0……(3)
2.0＜L/f＜7.0……(4)
0.8＜f5/f＜1.6……(5)
0.3＜|f1/f2|＜1.0……(6)
1.50＜f456/f＜2.50……(7)
0.50＜Bf/f＜1.20……(8)
1.0＜f2＜f＜2.0……(9)
0.03＜|R8/R9|＜1.0……(10)
2.0＜|R4/f|＜4.2……(11)
0.15＜Bf/(L-Bf)＜0.5……(12)
2.0＜ED1/IH＜4.0……(13)
Wherein,
f: focal length of the whole system
f 1: focal length of 1 st lens
f 2: focal length of 2 nd lens
f 3: focal length of the 3 rd lens
f 5: focal length of the 5 th lens
f 6: focal length of the 6 th lens
f 456: the combined focal length from the 4 th lens to the 6 th lens
R3: radius of curvature of object-side surface of 2 nd lens
R4: radius of curvature of image-side surface of the 2 nd lens
R8: radius of curvature of the object-side surface of the 4 th lens L4
R9: radius of curvature of the image-side surface of the 4 th lens L4
L: distance on optical axis from the object side surface to the image plane of the lens of the 1 st lens L1 (rear intercept part is air converted length)
Bf: distance on the optical axis from the image-side surface of the 6 th lens L6 to the image plane (corresponding to back focal length and air converted length)
ED 1: maximum ray height of the object-side surface of the 1 st lens L1
IH: maximum image height
The ED1 and IH may be determined by, for example, the specification of the imaging lens or the specification of an appropriate imaging device.
The conditional expression (1) is a power ratio with respect to the 5 th lens L5 and the 6 th lens L6. The 5 th lens L5 and the 6 th lens L6 are both positive lenses, but the light height at the 6 th lens is higher than that of the 5 th lens L5 as shown in fig. 1. If the upper limit of the conditional expression (1) is exceeded, the optical power of the 6 th lens L6 becomes too large, the curvature increases, and the rim thickness (lens rim thickness) decreases, so that processing becomes difficult. If the power is lower than the lower limit of conditional expression (1), the power of the 5 th lens L5 becomes too large, and it becomes difficult to correct the field curvature satisfactorily.
By configuring to satisfy the conditional expression (2), positive power can be commonly allocated to the 2 nd lens L2 and the 3 rd lens L3, and spherical aberration can be corrected well. That is, if the upper limit or the lower limit of the conditional expression (2) is deviated, the correction of the spherical aberration becomes difficult because the positive power is deviated to the 2 nd lens L2 or the 3 rd lens L3.
If the upper limit of conditional expression (3) is exceeded, correction of field curvature becomes difficult. If the value is less than the lower limit of conditional expression (3), the radius of curvature of the object-side surface of the 2 nd lens L2 decreases, and the edge thickness (lens edge thickness) becomes too small, which makes processing difficult.
If the upper limit of the conditional expression (4) is exceeded, the total length in the optical axis direction becomes long, and the lens system becomes large in size or it becomes difficult to realize a wide angle. If the total length is less than the lower limit of conditional expression (4), the total length becomes too short, and the lenses become thin, which makes processing and assembling of the lenses difficult.
If the upper limit of conditional expression (5) is exceeded, it becomes difficult to correct the field curvature satisfactorily. If the refractive power is lower than the lower limit of conditional expression (5), the refractive power of the 5 th lens L5 becomes too large, and the allowable amount of manufacturing error and assembly error with respect to decentering decreases, making assembly difficult or causing cost increase.
If the optical power of the 1 st lens L1 is reduced beyond the upper limit of the conditional expression (6), it is difficult to achieve a wide angle of view or to obtain a long back intercept. If the lower limit of conditional expression (6) is exceeded, it becomes difficult to correct the field curvature and distortion satisfactorily.
If the upper limit of conditional expression (7) is exceeded, distortion is corrected well and it is difficult to widen the angle. If the lower limit of conditional expression (7) is exceeded, it becomes difficult to correct the field curvature, and the rear intercept becomes short, making it difficult to dispose various filters, cover glasses, and the like between the lens system and the image pickup element disposed on the image plane.
If the upper limit of the conditional expression (8) is exceeded, the back focal length becomes too long, and as a result, the lens system becomes large. If the lower limit of conditional expression (8) is exceeded, it becomes difficult to dispose various filters, cover glasses, and the like between the lens system and the image pickup element disposed on the image plane. Further, ghost due to return light from the imaging element to the lens system is likely to occur.
If the refractive power of the 2 nd lens L2 exceeds the upper limit of the conditional expression (9), the manufacturing error and the allowable amount of assembly error with respect to decentering decrease, and assembly becomes difficult or causes cost increase. If the lower limit of conditional expression (9) is exceeded, it becomes difficult to correct coma aberration (also referred to as coma aberration) satisfactorily.
If the upper limit of conditional expression (10) is exceeded, it becomes difficult to correct the field curvature satisfactorily. If the value is less than the lower limit of conditional expression (10), the absolute value of the radius of curvature of the object-side surface of the 4 th lens L4 becomes too small, and thus the processing becomes difficult.
If the upper limit of conditional expression (11) is exceeded, it becomes difficult to correct the field curvature. If the value is less than the lower limit of conditional expression (11), the absolute value of the radius of curvature of the image-side surface of the 2 nd lens L2 decreases, and the edge thickness (lens edge thickness) becomes excessively small, which makes processing difficult.
If the upper limit of the conditional expression (12) is exceeded, the entire system becomes large. If the lower limit of conditional expression (12) is exceeded, the back intercept becomes short, and it becomes difficult to dispose various filters, cover glasses, and the like between the lens system and the image pickup element disposed on the image plane.
If the upper limit of conditional expression (13) is exceeded, the effective diameter of the 1 st lens L1 becomes too large, and it becomes difficult to reduce the size of the portion of the lens exposed to the outside. For example, when the present imaging lens is mounted on a vehicle-mounted camera, it is desirable that the lens portion exposed to the outside be small so as not to impair the appearance of the vehicle, and therefore, it is preferable that the upper limit of the conditional expression (13) be satisfied. If the lower limit of conditional expression (13) is exceeded, the portion exposed to the outside can be reduced in size, but it is difficult to separate the on-axis light beam and the off-axis light beam by the optical system on the front side of the aperture, and it is difficult to correct the field curvature satisfactorily.
Here, the "effective diameter of the lens surface" means a diameter of a circle drawn by an intersection between a light ray passing through the outermost side (a position farthest from the optical axis) and the lens surface among effective light rays passing through the lens surface when the optical system is rotationally symmetric. The effective light passing through the lens surface is light used for imaging an image of a subject.
The imaging lens of the present embodiment more preferably satisfies the following conditional expressions (1-1), (2-1), (4-2), (5-1), (6-1), (8-1), (9-1), and (10-1).
0.40＜f5/f6＜0.8……(1-1)
0.8＜f2/f3＜1.6……(2-1)
2.0＜L/f＜4.2……(4-1)
2.5＜L/f＜3.8……(4-2)
1.0＜f5/f＜1.6……(5-1)
0.4＜|f1/f2|＜0.8……(6-1)
0.7＜Bf/f＜1.0……(8-1)
1.2＜f2＜f＜1.9……(9-1)
0.3＜|R8/R9|＜0.9……(10-1)
Satisfying the conditional expression (1-1) is more advantageous in good correction of workability and field curvature.
It becomes easy to correct spherical aberration well by satisfying the conditional expression (2-1).
The lens system can be made smaller by satisfying the conditional expression (4-1).
The lens system can be further miniaturized by satisfying the conditional expression (4-2).
In addition, the L is preferably 24mm or less for downsizing the entire system, and more preferably 23mm or less for further downsizing the entire system.
It is more advantageous in terms of manufacturability or cost by satisfying the conditional expression (5-1).
By satisfying the upper limit of the conditional expression (6-1), it becomes easier to realize a wide angle or a long back intercept. Satisfying the lower limit of the conditional expression (6-1) is more advantageous in correcting the curvature and distortion of the image plane.
By satisfying the conditional expression (8-1), a smaller configuration can be achieved.
Satisfying the upper limit of conditional expression (9-1) is more advantageous in terms of manufacturability and cost. By satisfying the lower limit of the conditional expression (9-1), good correction of coma aberration becomes easier.
By satisfying the upper limit of the conditional expression (10-1), it becomes easier to correct the field curvature well. By satisfying the lower limit of the conditional expression (10-1), the workability of the 4 th lens L4 can be further improved.
When the imaging lens 1 is used in a severe environment such as a vehicle-mounted camera, for example, it is preferable to use a material having high water resistance, weather resistance, acid resistance, chemical resistance, and the like, which is stronger (in other words, resistant) to surface deterioration due to wind and rain, temperature change due to direct sunlight, and chemicals such as grease and detergent, for the 1 st lens L1 disposed closest to the object side. It is preferable to use a hard and non-brittle material as the material of the 1 st lens L1 disposed closest to the object side. As described above, glass is preferably used as the material of the 1 st lens L1. Alternatively, a transparent ceramic may be used. Ceramics have properties of higher strength and higher heat resistance than ordinary glasses.
The center thickness of the 1 st lens L1 is preferably 0.5mm or more. For example, when the lens system is applied to a vehicle-mounted camera, the lens system is required to have strength against various impacts. Therefore, the 1 st lens L1 can be made less brittle by setting the center thickness of the 1 st lens L1 to 0.5mm or more.
Further, in the case where the imaging lens 1 is applied to, for example, an in-vehicle camera, it is required to be usable in a temperature range from the atmosphere in a cold region to the inside of a vehicle in summer in a tropical region. When the lens is used in a wide temperature range, a material having a small linear expansion coefficient is preferably used as a material of the lens. In the case where the lens is required to be usable in a wide temperature range for use in a vehicle-mounted camera, all the lenses are preferably made of glass.
Further, the 1 st lens L1 may be provided with a waterproof structure to block air flow from the outside so that fog is not generated inside due to rapid temperature change and humidity change. The waterproof structure can be a sealed structure formed by bonding the 1 st lens L1 and the lens frame. A sealing structure may be formed by interposing an airtight member such as an O-ring between the 1 st lens L1 and the lens frame.
When the lens system is used in a rapid temperature environment or a humidity environment, it is preferable that no cemented lens is used in the lens system. For example, in the case of a vehicle-mounted camera, the temperature range from the atmosphere in a cold region to the temperature range in a vehicle in summer in a tropical region is used. In the case of using a cemented lens, a special adhesive is required to be used in a wide temperature range, which causes an increase in cost.
In order to produce lenses at low cost, it is preferable that all the lenses are spherical lenses. Alternatively, in the case where importance is attached to performance, an aspherical lens may be used to correct each aberration more favorably. In addition, plastic may be used as a material of the lens in order to form the aspherical surface with high accuracy and at low cost.
When the imaging lens 1 is applied to an imaging device, a cover glass, a low-pass filter, an infrared cut filter, or the like is preferably provided depending on the configuration of the camera side where the lens is mounted, and the optical member PP is assumed to be such a member. For example, when the imaging lens 1 is used in an in-vehicle camera and is used as a night vision camera for night vision assistance, a filter for cutting off ultraviolet light to blue light may be interposed between the lens system and the imaging element.
Instead of disposing various filters such as a low-pass filter or a filter for cutting off a specific wavelength band between the lens system and the image pickup device 5, these various filters may be disposed between the lenses. Alternatively, a coating layer having the same function as that of each filter may be applied to the lens surface of any lens included in the imaging lens 1.
Further, since the light flux passing through the space between the lenses and outside the effective diameter may become stray light and reach the image plane, and may become ghost, it is preferable to provide a light shielding mechanism for shielding the stray light as necessary. As the light shielding mechanism, for example, an opaque paint may be applied to a portion outside the effective diameter of the lens, or an opaque plate may be provided. Alternatively, an opaque plate member may be provided as the light blocking mechanism on the optical path of the light beam which becomes stray light. Alternatively, an element such as a shade for blocking stray light may be disposed on the object side of the lens closest to the object side. For example, fig. 1 shows an example in which the light shielding mechanisms 11 and 12 are provided on the image side surfaces of the 1 st lens L1 and the 2 nd lens L2, respectively, but the locations where the light shielding mechanisms are provided are not limited to the example shown in fig. 1, and may be arranged on other lenses or between lenses.
Further, a member for blocking peripheral light may be disposed between the lenses. The peripheral light rays refer to light rays passing through the peripheral portion of the entrance pupil of the optical system among light rays from object points other than the optical axis Z. By blocking peripheral light rays in a range where the peripheral light quantity is less than a practical problem, the image quality of the peripheral portion of the imaging region can be improved. Further, ghost can be reduced by blocking light that causes ghost with this member.
[ examples ]
Next, a specific numerical example of the imaging lens according to the present invention will be described.
< example 1>
Fig. 2 shows a lens configuration diagram of an imaging lens in example 1, and table 1 shows lens data and various data.
[ Table 1]
Example 1 lens data example 1 various data
In the lens data in table 1, the surface number is the i-th (i is 1, 2, 3, and …) surface number that increases in the order of the 1 st surface, with the surface of the element closest to the object side. The lens data in table 1 further includes an aperture stop St and an optical member PP.
Ri in table 1 denotes a curvature radius of the ith (i: 1, 2, 3, …) plane, and Di denotes a plane interval on the optical axis Z between the ith (i: 1, 2, 3, …) plane and the (i + 1) th plane. Ndj shows the refractive index of the j-th (j is 1, 2, 3, …) optical element to the d-line, which is the 1 st optical element closest to the object side and increases in the order toward the image side, and vdj shows the abbe number of the j-th optical element to the d-line. In table 1, the curvature radius is positive when the object side is convex and negative when the image side is convex.
In the data in table 1, fno denotes an F number, 2 ω denotes a full field angle, L denotes a distance on the optical axis Z from the object-side surface of the 1 st lens L1 to the image plane (back focal length portion is an air converted length), Bf denotes a distance (corresponding to a back focal length and an air converted length) from the image-side surface of the 6 th lens L6 to the image plane, F is a focal length of the entire system, F1 is a focal length of the 1 st lens L1, F2 is a focal length of the 2 nd lens L2, F3 is a focal length of the 3 rd lens L3, F4 is a focal length of the 4 th lens L4, F5 is a focal length of the 5 th lens L5, F6 is a focal length of the 6 th lens L6, F456 is a composite focal length from the 4 th lens L4 to the 6 th lens L6 (a composite focal length of the 4 th lens L4, the 5 th lens L5 and the 6L 6), IH is a maximum focal length on the object-side surface of the 4 th lens L1, and IH is a maximum height of the image surface 1.
In the various data of table 1, the unit of 2 ω is degree. As the units of the radius of curvature and the surface interval in table 1, L, Bf, each focal length, the combined focal length, IH, and ED1 in table 1, "mm" is used here. However, since the optical system achieves equivalent optical performance even when scaled up or down, the unit is not limited to "mm", and other appropriate units may be used.
In fig. 2, the left side of the figure is the object side, and the right side is the image side. The aperture stop St shown in fig. 2 does not indicate a shape or a size but indicates a position on the optical axis Z. Symbols Ri and Di (i ═ 1, 2, 3, and …) in fig. 2 correspond to Ri and Di in table 1.
The meanings of the symbols in table 1 and the method of illustrating the lens structure diagram explained above are basically the same for the embodiments described later.
The imaging lens in embodiment 1 is configured from the object side, in order, the 1 St lens L1 of a biconcave lens, the 2 nd lens L2 of a biconvex lens, the 3 rd lens L3 of a biconvex lens, the aperture stop St, the 4 th lens L4 of a biconcave lens, the 5 th lens L5 of a plano-convex lens with a convex surface facing the image side, and the 6 th lens L6 of a biconvex lens.
< example 2>
Fig. 3 shows a lens configuration diagram of an imaging lens in example 2, and table 2 shows lens data and various data. The imaging lens in embodiment 2 is configured from the object side, in order, the 1 St lens L1 of a biconcave lens, the 2 nd lens L2 of a biconvex lens, the 3 rd lens L3 of a biconvex lens, the aperture stop St, the 4 th lens L4 of a biconcave lens, the 5 th lens L5 of a planoconvex lens with a convex surface facing the image side, and the 6 th lens L6 of a biconvex lens.
[ Table 2]
Example 2 lens data example 2 various data
< example 3>
Fig. 4 shows a lens configuration diagram of an imaging lens in example 3, and table 3 shows lens data and various data. The imaging lens according to embodiment 3 is configured from, in order from the object side, the 1 St lens L1 of a biconcave lens, the 2 nd lens L2 of a biconvex lens, the 3 rd lens L3 of a biconvex lens, the aperture stop St, the 4 th lens L4 of a biconcave lens, the 5 th lens L5 of a positive meniscus lens with the convex surface facing the image side, and the 6 th lens L6 of a biconvex lens.
[ Table 3]
Example 3 lens data example 3 various data
< example 4>
Fig. 5 shows a lens configuration diagram of an imaging lens of example 4, and table 4 shows lens data and various data. The imaging lens according to embodiment 4 is configured from, in order from the object side, the 1 St lens L1 of a biconcave lens, the 2 nd lens L2 of a biconvex lens, the 3 rd lens L3 of a biconvex lens, the aperture stop St, the 4 th lens L4 of a biconcave lens, the 5 th lens L5 of a positive meniscus lens with the convex surface facing the image side, and the 6 th lens L6 of a biconvex lens.
[ Table 4]
Example 4 lens data example 4 various data
< example 5>
Fig. 6 shows a lens configuration diagram of an imaging lens in example 5, and table 5 shows lens data and various data. The imaging lens according to embodiment 5 is configured from, in order from the object side, the 1 St lens L1 of a biconcave lens, the 2 nd lens L2 of a biconvex lens, the 3 rd lens L3 of a biconvex lens, the aperture stop St, the 4 th lens L4 of a biconcave lens, the 5 th lens L5 of a planoconvex lens with a convex surface facing the image side, and the 6 th lens L6 of a biconvex lens.
[ Table 5]
Example 5 lens data example 5 various data
< example 6>
Fig. 7 shows a lens configuration diagram of an imaging lens of example 6, and table 6 shows lens data and various data. The imaging lens according to embodiment 6 is configured from, in order from the object side, the 1 St lens L1 of a biconcave lens, the 2 nd lens L2 of a biconvex lens, the 3 rd lens L3 of a biconvex lens, the aperture stop St, the 4 th lens L4 of a biconcave lens, the 5 th lens L5 of a planoconvex lens with a convex surface facing the image side, and the 6 th lens L6 of a biconvex lens.
[ Table 6]
Example 6 lens data example 6 various data
< example 7>
Fig. 8 shows a lens configuration diagram of an imaging lens in example 7, and table 7 shows lens data and various data. The imaging lens according to embodiment 7 is configured from, in order from the object side, the 1 St lens L1 of a biconcave lens, the 2 nd lens L2 of a biconvex lens, the 3 rd lens L3 of a biconvex lens, the aperture stop St, the 4 th lens L4 of a biconcave lens, the 5 th lens L5 of a positive meniscus lens with the convex surface facing the image side, and the 6 th lens L6 of a biconvex lens.
[ Table 7]
Example 7 lens data example 7 various data
Table 8 shows values corresponding to conditional expressions (1) to (13) of the imaging lenses of examples 1 to 7. In examples 1 to 7, d-line is set as a reference wavelength, and each value at the reference wavelength is shown in table 8. Furthermore, as is clear from table 8, all of examples 1 to 7 satisfy conditional expressions (1) to (13).
[ Table 8]
Fig. 9(a), 9(B), 9(C), and 9(D) are aberration diagrams showing spherical aberration, astigmatism, distortion, and chromatic aberration of magnification (chromatic aberration of magnification) of the imaging lens in example 1, respectively. Each aberration diagram shows aberration with the d-line (587.56nm) as a reference wavelength, but the spherical aberration diagram and the magnification chromatic aberration diagram also show aberration for the F-line (486.13 nm), C-line (656.27 nm), and s-line (852.11 nm). In addition, the spherical aberration also indicates an amount of sine condition violation (offecegaainsidetshiesinesdition) as the OSC. The F No. of the spherical aberration diagram is the F number, and ω of the other aberration diagrams represents the half angle of view. The focal length f and the angle of view of the whole system are used for the distorted image
(variable number processing,
) Setting the ideal image height as f
Indicating an offset from it.
Similarly, aberration diagrams of spherical aberration, astigmatism, distortion (distortion aberration), and chromatic aberration of the imaging lenses according to examples 2, 3, 4, 5, 6, and 7 are shown in fig. 10(a) to 10(D), fig. 11(a) to 11(D), fig. 12(a) to 12(D), fig. 13(a) to 13(D), fig. 14(a) to 14(D), and fig. 15(a) to 15(D), respectively. As can be seen from the aberration diagrams, the aberrations of examples 1 to 5 are well corrected from the visible light region to the near infrared region.
The imaging lenses of examples 1 to 7 are all composed of spherical lenses in a 6-piece lens structure, and all are composed of single lenses without using any cemented lenses, so that they can be manufactured at low cost. The imaging lenses of examples 1 to 7 are small in size, have a wide angle, and have excellent optical performance, have an F number as small as 2.0, and are well corrected for aberrations from the visible light region to the near infrared region, and therefore can be suitably used in surveillance cameras, in-vehicle cameras for capturing images of the front, side, rear, and the like of an automobile, and the like.
Fig. 16 shows a use example in which an imaging device including the imaging lens of the present embodiment is mounted on an automobile 100. In fig. 16, an automobile 100 includes an exterior camera 101 for imaging a blind spot area on a side surface of the automobile 100 on the assistant seat side, an exterior camera 102 for imaging a blind spot area on the rear side of the automobile 100, and an interior camera 103 attached to the rear surface of an interior mirror for imaging the same visual field as that of a driver. The exterior camera 101, the exterior camera 102, and the interior camera 103 are imaging devices according to embodiments of the present invention, and include an imaging lens according to an embodiment of the present invention and an imaging element for converting an optical image formed by the imaging lens into an electrical signal.
The imaging lens according to the embodiment of the present invention has the above-described advantages, and therefore, the exterior cameras 101 and 102 and the interior camera 103 can be configured to be small and inexpensive, and can form a good image on the imaging surface of the imaging element.
The present invention has been described above by way of the embodiments and examples, but the present invention is not limited to the above embodiments and examples, and various modifications are possible. For example, the values of the curvature radius, the surface interval, the refractive index, and the abbe number of each lens component are not limited to the values shown in the numerical examples, and may be other values.
In the embodiment of the imaging device, the example in which the present invention is applied to the vehicle-mounted camera is described, but the present invention is not limited to this application, and can be applied to, for example, a camera for a mobile terminal, a monitoring camera, and the like.
Claims (11)
1. An imaging lens includes, in order from an object side: a 1 st lens having a concave surface facing the image side and having a negative refractive power; a 2 nd lens which is a biconvex lens and has positive focal power; a 3 rd lens having a positive focal power; a diaphragm; a 4 th lens which is a biconcave lens and has negative focal power; a 5 th lens having a convex surface facing the image side and having a positive refractive power; and a 6 th lens having a convex surface directed to the object side and having a positive power;
the absolute value of the radius of curvature of the object-side surface of the 2 nd lens is equal to or smaller than the absolute value of the radius of curvature of the image-side surface,
the absolute value of the radius of curvature of the object-side surface of the above-mentioned lens 3 is equal to or smaller than the absolute value of the radius of curvature of the image-side surface,
the abbe number of the material of the 2 nd lens to d-line is 45 or more,
the abbe number of the material of the 4 th lens to the d-line is 30 or less.
2. The imaging lens according to claim 1,
the 1 st lens element is a biconcave lens element having an object-side surface with a larger absolute value of a radius of curvature than an image-side surface,
the absolute value of the radius of curvature of the object-side surface of the 5 th lens is larger than the absolute value of the radius of curvature of the image-side surface of the 5 th lens,
in the above-described lens 6, an absolute value of a radius of curvature of the object-side surface is smaller than an absolute value of a radius of curvature of the image-side surface.
3. The imaging lens according to claim 1 or 2,
when the focal length of the 5 th lens is f5 and the focal length of the 6 th lens is f6, the following conditional expression (1) is satisfied:
0.30＜f5/f6＜0.95……(1)。
4. the imaging lens according to claim 1 or 2,
when the focal length of the 2 nd lens is f2 and the focal length of the 3 rd lens is f3, the following conditional expression (2) is satisfied:
0.50＜f2/f3＜1.80……(2)。
5. the imaging lens according to claim 1 or 2,
when the focal length of the entire system is f and the curvature radius of the object-side surface of the 2 nd lens element is R3, the following conditional expression (3) is satisfied:
0.5＜R3/f＜4.0……(3)。
6. the imaging lens according to claim 1 or 2,
when the focal length of the entire system is f and the distance on the optical axis from the object-side surface of the lens closest to the object-side surface to the image plane is L, the following conditional expression (4) is satisfied:
2.0＜L/f＜7.0……(4)。
7. the imaging lens according to claim 1 or 2,
the refractive index of the material of the 2 nd lens to the d line is between 1.65 and 1.9.
8. The imaging lens according to claim 1 or 2,
when the focal length of the entire system is f and the focal length of the 5 th lens is f5, the following conditional expression (5) is satisfied:
0.8＜f5/f＜1.6……(5)。
9. the imaging lens according to claim 1 or 2,
when the focal length of the 1 st lens is f1 and the focal length of the 2 nd lens is f2, the following conditional expression (6) is satisfied:
0.3＜|f1/f2|＜1.0……(6)。
10. the imaging lens according to claim 1 or 2,
when the focal length of the entire system is f and the combined focal length from the 4 th lens to the 6 th lens is f456, the following conditional expression (7) is satisfied:
1.50＜f456/f＜2.50……(7)。
11. an imaging device comprising the imaging lens according to claim 1 or 2.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008260272A JP5479702B2 (en) | 2008-10-07 | 2008-10-07 | Imaging lens and imaging apparatus |
| JP2008260272 | 2008-10-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201340475Y true CN201340475Y (en) | 2009-11-04 |
Family
ID=41236018
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201819547U Expired - Lifetime CN201340475Y (en) | 2008-10-07 | 2008-12-23 | Image pick-up lens and image pick-up device |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP5479702B2 (en) |
| CN (1) | CN201340475Y (en) |
| TW (1) | TWM359701U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102736218A (en) * | 2012-05-31 | 2012-10-17 | 舜宇光学(中山)有限公司 | 5-megapixel monitoring lens |
| CN108398769A (en) * | 2018-05-30 | 2018-08-14 | 广东旭业光电科技股份有限公司 | Optical imaging lens |
| CN109991715A (en) * | 2017-12-29 | 2019-07-09 | 宁波舜宇车载光学技术有限公司 | Optical lens |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102060658B1 (en) | 2012-07-25 | 2019-12-30 | 삼성전자주식회사 | Photographing lens and photographing apparatus |
| TWI451121B (en) * | 2013-02-08 | 2014-09-01 | Newmax Technology Co Ltd | Six-piece optical lens system |
| JP5852764B2 (en) | 2013-03-26 | 2016-02-03 | 富士フイルム株式会社 | Imaging lens and imaging apparatus |
| JP2016062020A (en) | 2014-09-19 | 2016-04-25 | 富士フイルム株式会社 | Imaging lens and imaging apparatus |
| JP2016062019A (en) | 2014-09-19 | 2016-04-25 | 富士フイルム株式会社 | Imaging lens and imaging apparatus |
| JP2016062021A (en) | 2014-09-19 | 2016-04-25 | 富士フイルム株式会社 | Imaging lens and imaging apparatus |
| JP2016212134A (en) | 2015-04-30 | 2016-12-15 | 富士フイルム株式会社 | Imaging lens and imaging device |
| CN107315237B (en) * | 2017-08-18 | 2023-03-24 | 广东北创光电科技股份有限公司 | Optical lens with focal length of 12mm |
| CN108627952B (en) * | 2018-02-08 | 2020-02-14 | 富晋精密工业（晋城）有限公司 | Optical lens |
| CN109470157B (en) * | 2018-12-27 | 2023-10-13 | 博众精工科技股份有限公司 | Imaging system and device for inner hole detection |
| CN113253424B (en) * | 2021-04-30 | 2024-11-08 | 福建福光天瞳光学有限公司 | A 5.4mm large aperture high-definition lens and imaging method thereof |
| US12468120B2 (en) | 2021-07-05 | 2025-11-11 | Sintai Optical (Shenzhen) Co., Ltd. | Wide-angle lens assembly |
| TWI786810B (en) * | 2021-09-07 | 2022-12-11 | 信泰光學（深圳）有限公司 | Wide-angle lens assembly |
| JP7690809B2 (en) | 2021-08-03 | 2025-06-11 | セイコーエプソン株式会社 | Optical system and projector |
| CN118838033B (en) * | 2024-08-14 | 2025-02-07 | 武昌理工学院 | Optical objective lens set and capsule endoscope |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5153823A (en) * | 1974-11-05 | 1976-05-12 | Miranda Kamera Kk | Kogatakeiryono retorofuookasugatakokakurenzu |
| JPS5517132A (en) * | 1978-07-24 | 1980-02-06 | Konishiroku Photo Ind Co Ltd | High contrast objective lens used in finite distance |
| JP2006031055A (en) * | 2005-10-07 | 2006-02-02 | Nikon Corp | Near-infrared luminous flux transmission lens system |
-
2008
- 2008-10-07 JP JP2008260272A patent/JP5479702B2/en not_active Expired - Fee Related
- 2008-12-23 CN CNU2008201819547U patent/CN201340475Y/en not_active Expired - Lifetime
- 2008-12-23 TW TW97223062U patent/TWM359701U/en not_active IP Right Cessation
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102736218A (en) * | 2012-05-31 | 2012-10-17 | 舜宇光学(中山)有限公司 | 5-megapixel monitoring lens |
| CN109991715A (en) * | 2017-12-29 | 2019-07-09 | 宁波舜宇车载光学技术有限公司 | Optical lens |
| CN109991715B (en) * | 2017-12-29 | 2022-01-07 | 宁波舜宇车载光学技术有限公司 | Optical lens |
| CN108398769A (en) * | 2018-05-30 | 2018-08-14 | 广东旭业光电科技股份有限公司 | Optical imaging lens |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2010091697A (en) | 2010-04-22 |
| TWM359701U (en) | 2009-06-21 |
| JP5479702B2 (en) | 2014-04-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201340475Y (en) | Image pick-up lens and image pick-up device | |
| JP5224455B2 (en) | Imaging lens and imaging apparatus | |
| JP5065159B2 (en) | Imaging lens and imaging apparatus | |
| JP5393276B2 (en) | Imaging lens and imaging apparatus | |
| EP2012162B1 (en) | Imaging lens and imaging device | |
| JP5042767B2 (en) | Imaging lens and imaging apparatus | |
| JP5576717B2 (en) | Imaging lens and imaging apparatus | |
| JP5143595B2 (en) | Imaging lens and imaging apparatus | |
| EP1947497B1 (en) | Compact fisheye objective lens | |
| US8248715B2 (en) | Imaging lens and imaging apparatus using imaging lens | |
| US7746572B2 (en) | Imaging lens and image pickup apparatus | |
| US7830620B2 (en) | Imaging lens and imaging apparatus | |
| JP5015657B2 (en) | Image pickup lens and image pickup apparatus including the image pickup lens | |
| JP5335710B2 (en) | Imaging lens and imaging apparatus | |
| CN201707490U (en) | Pickup lens and pickup device | |
| JP5438583B2 (en) | Imaging lens and imaging apparatus | |
| CN201837767U (en) | Shooting lens and shooting device | |
| JP2009092798A (en) | Imaging lens and imaging device | |
| JP2009086644A (en) | Imaging lens and imaging apparatus | |
| JP2010014855A (en) | Imaging lens and imaging apparatus | |
| JP2008250136A (en) | Imaging lens and imaging apparatus | |
| JP2009098322A (en) | Imaging lens and imaging apparatus | |
| CN104914554A (en) | Imaging lens and imaging apparatus | |
| JP2009145809A (en) | Image pickup lens and image pickup apparatus | |
| JP2011257462A (en) | Imaging lens and imaging device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20181009 Address after: Tokyo, Japan Patentee after: Fuji Film Corp. Address before: Japan's Saitama Prefecture Patentee before: Fujinon Corp. |
|
| TR01 | Transfer of patent right | ||
| CX01 | Expiry of patent term |
Granted publication date: 20091104 |
|
| CX01 | Expiry of patent term |