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WO2019052179A1 - 成像透镜组 - Google Patents

成像透镜组 Download PDF

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Publication number
WO2019052179A1
WO2019052179A1 PCT/CN2018/084210 CN2018084210W WO2019052179A1 WO 2019052179 A1 WO2019052179 A1 WO 2019052179A1 CN 2018084210 W CN2018084210 W CN 2018084210W WO 2019052179 A1 WO2019052179 A1 WO 2019052179A1
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WIPO (PCT)
Prior art keywords
lens
imaging lens
lens group
imaging
image side
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.)
Ceased
Application number
PCT/CN2018/084210
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English (en)
French (fr)
Inventor
李明
闻人建科
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Sunny Optics Co Ltd
Original Assignee
Zhejiang Sunny Optics Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from CN201721190577.9U external-priority patent/CN207123649U/zh
Priority claimed from CN201710838882.2A external-priority patent/CN107390350B/zh
Application filed by Zhejiang Sunny Optics Co Ltd filed Critical Zhejiang Sunny Optics Co Ltd
Priority to US16/273,447 priority Critical patent/US11693214B2/en
Publication of WO2019052179A1 publication Critical patent/WO2019052179A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
    • G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
    • G02B13/0045—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having five or more lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G02B13/0055—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/02—Simple or compound lenses with non-spherical faces
    • G02B3/04—Simple or compound lenses with non-spherical faces with continuous faces that are rotationally symmetrical but deviate from a true sphere, e.g. so called "aspheric" lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/028—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with means for compensating for changes in temperature or for controlling the temperature; thermal stabilisation
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B9/00—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or -
    • G02B9/62—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having six components only

Definitions

  • the present invention relates to an imaging lens group, and more particularly to a glass aspherical imaging lens group.
  • photosensitive elements commonly used in optical systems include CCD (Charge-Coupled Device) and CMOS (Complementary Metal-Oxide Semiconductor).
  • CCD Charge-Coupled Device
  • CMOS Complementary Metal-Oxide Semiconductor
  • the present invention provides an imaging lens group.
  • An aspect of the invention provides an imaging lens group, comprising: a first lens from an object side to an image side of the imaging lens group, the first lens having a positive power and a convex side of the object side; a lens having a negative power and a concave side of the image side; and at least one subsequent lens, wherein at least one of the first lens, the second lens, and the at least one subsequent lens is a glass aspheric lens
  • the imaging lens group has a transmittance T1>85% corresponding to the 650 nm band, a transmittance T2>88% of the imaging lens group corresponding to the 490 nm band, and a transmittance T3>75% of the imaging lens group corresponding to the 430 nm band.
  • the influence rate of the unit temperature of the glass aspheric lens on the unit refractive index dng/dt and the unit temperature of the lens closest to the image side on the unit refractive index dni/dt satisfy
  • the dispersion coefficient Vg of the glass aspheric lens and the dispersion coefficient Vi of the lens closest to the image side satisfy 0.35 ⁇ Vg / Vi ⁇ 1.5.
  • the refractive index Ng of the glass aspheric lens satisfies 1.5 ⁇ Ng ⁇ 2.0.
  • the effective focal length f of the imaging lens group and the entrance pupil diameter of the imaging lens group satisfy 1.5 ⁇ f / EPD ⁇ 2.5.
  • the effective focal length f of the imaging lens group and the effective focal length fg of the glass aspheric lens satisfy -0.6 ⁇ f / fg ⁇ 1.2.
  • the effective focal length f of the imaging lens group and the radius of curvature R1 of the first lens object side satisfy 2 ⁇ f / R1 ⁇ 4.
  • 0 ⁇ R1/R4 ⁇ 1.0 is satisfied between the radius of curvature R1 of the side surface of the first lens object and the radius of curvature R4 of the side surface of the second lens image.
  • Another aspect of the present invention provides an imaging lens group including, in order from an object side to an image side of an imaging lens group, a first lens, a second lens, and at least one subsequent lens, wherein At least one of the lens, the second lens and the at least one subsequent lens is a glass aspherical lens, and the influence rate of the unit temperature of the glass aspheric lens on the unit refractive index is dng/dt and the unit temperature of the lens closest to the image side The influence rate on the unit refractive index dni/dt satisfies
  • the first lens has a positive power and the object side thereof is convex
  • the second lens has a negative power and the image side is a concave surface
  • Another aspect of the present invention provides an imaging lens group that sequentially includes, from an object side to an image side of the imaging lens group, a first lens having a positive refractive power and a side surface of the object being a convex surface; a second lens having a negative power and a concave side of the image side; and at least one subsequent lens, wherein at least one of the first lens, the second lens and the at least one subsequent lens
  • One lens is a glass aspherical lens, and the effective focal length f of the imaging lens group and the radius of curvature R1 of the first lens object side satisfy 2 ⁇ f/R1 ⁇ 4.
  • the at least one subsequent lens includes, in order from the second lens to the image side along the optical axis, a third lens, a fourth lens, and a fifth lens, the third lens may have a positive power; the fourth lens may be Has a negative power; and the fifth lens can have a negative power.
  • the at least one subsequent lens includes, in order from the second lens to the image side along the optical axis, a third lens, a fourth lens, a fifth lens, and a sixth lens, and the third lens may have positive power or Negative power; the fourth lens may have a positive power or a negative power; the fifth lens may have a positive power or a negative power; and the sixth lens may have a positive power or a negative power.
  • the dispersion coefficient Vg of the glass aspheric lens and the dispersion coefficient Vi of the lens closest to the image side satisfy 0.35 ⁇ Vg / Vi ⁇ 1.5.
  • the refractive index Ng of the glass aspheric lens satisfies 1.5 ⁇ Ng ⁇ 2.0.
  • the effective focal length f of the imaging lens group and the entrance pupil diameter of the imaging lens group satisfy 1.5 ⁇ f / EPD ⁇ 2.5.
  • the effective focal length f of the imaging lens group and the effective focal length fg of the glass aspheric lens satisfy -0.6 ⁇ f / fg ⁇ 1.2.
  • 0 ⁇ R1/R4 ⁇ 1.0 is satisfied between the radius of curvature R1 of the side surface of the first lens object and the radius of curvature R4 of the side surface of the second lens image.
  • the imaging lens group according to the present invention includes at least one glass aspherical lens, so that the imaging lens group has higher imaging brightness, permeability, and color reproducibility, so that the performance of the imaging lens group can be greatly improved.
  • FIG. 1 is a schematic structural view of an imaging lens group of Embodiment 1;
  • FIG. 6 is a schematic structural view of an imaging lens group of Embodiment 2;
  • Figure 11 is a view showing the configuration of an imaging lens unit of Embodiment 3.
  • Figure 16 is a view showing the configuration of an imaging lens unit of Embodiment 4.
  • FIG. 21 is a schematic structural view of an imaging lens group of Embodiment 5.
  • FIG. 26 illustrates transmittances of imaging lens groups corresponding to respective wavelength bands according to an embodiment of the present disclosure.
  • a first element, component, region, layer or layer s s s s ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇
  • the application provides an imaging lens set.
  • the imaging lens group according to the present application is sequentially provided from the object side to the image side of the imaging lens group: a first lens having positive power, a second lens having negative power, and at least one subsequent lens.
  • the object side surface of the first lens is a convex surface
  • the image side surface of the second lens is a concave surface.
  • at least one of the first lens, the second lens, and the at least one subsequent lens is a glass aspheric lens.
  • the at least one subsequent lens includes, in order from the second lens to the image side along the optical axis, a third lens, a fourth lens, and a fifth lens, the third lens may have a positive power; the fourth lens may be Has a negative power; and the fifth lens can have a negative power.
  • the at least one subsequent lens includes, in order from the second lens to the image side along the optical axis, a third lens, a fourth lens, a fifth lens, and a sixth lens, and the third lens may have positive power or Negative power; the fourth lens may have a positive power or a negative power; the fifth lens may have a positive power or a negative power; and the sixth lens may have a positive power or a negative power.
  • the imaging lens group has a transmittance T1>85% corresponding to the 650 nm band, the transmittance T2>88% of the imaging lens group corresponding to the 490 nm band, and the transmittance T3 of the imaging lens group corresponding to the 430 nm band. >75%.
  • the optical lens of the glass material is used in the imaging lens group of the present application, so that the lens has higher transmittance, and has higher brightness, transparency, and color reproduction performance when imaging.
  • the influence rate of the unit temperature of the glass aspheric lens on the unit refractive index dng/dt and the unit temperature of the lens closest to the image side on the unit refractive index dni/dt satisfy
  • the dispersion coefficient Vg of the glass aspheric lens and the dispersion coefficient Vi of the lens closest to the image side satisfy 0.35 ⁇ Vg/Vi ⁇ 1.5, and more specifically, 0.37 ⁇ Vg/Vi ⁇ 1.46.
  • the use of a glass lens in the imaging lens group of the present application advantageously distributes the dispersion coefficient of the glass by satisfying the above relationship, which is advantageous in greatly reducing the chromatic aberration of the optical system.
  • the refractive index Ng of the glass aspheric lens satisfies 1.5 ⁇ Ng ⁇ 2.0, and more specifically, satisfies 1.5 ⁇ Ng ⁇ 1.92.
  • the refractive index range of the glass is reasonably selected, and the use of high-priced glass is avoided to ensure the cost of the lens.
  • the effective focal length f of the imaging lens group and the entrance pupil diameter of the imaging lens group satisfy 1.5 ⁇ f / EPD ⁇ 2.5, and more specifically, 1.68 ⁇ f / EPD ⁇ 2.28.
  • the imaging lens group that satisfies the above relationship has a larger luminous flux, so that the lens acquires a sufficiently high brightness.
  • the effective focal length f of the imaging lens group and the effective focal length fg of the glass aspheric lens satisfy -0.6 ⁇ f / fg ⁇ 1.2, and more specifically, -0.52 ⁇ f / fg ⁇ 1.05.
  • the effective focal length f of the imaging lens group and the radius of curvature R1 of the first lens object side satisfy 2 ⁇ f/R1 ⁇ 4, and more specifically, 2.35 ⁇ f/R1 ⁇ 3.85.
  • the curvature of the object side of the first lens is set within a reasonable range, ensuring a good tolerance of the overall lens and matching the processing capability.
  • the radius of curvature R1 of the side surface of the first lens object and the radius of curvature R4 of the side surface of the second lens image satisfy 0 ⁇ R1/R4 ⁇ 1.0, and more specifically, satisfy 0.43 ⁇ R1/R4 ⁇ 0.91. .
  • the curvatures of the first lens and the second lens can be effectively matched, so that the vertical chromatic aberration of the system can be reduced, and the color reproduction during use of the chip is not affected.
  • an imaging lens group according to Embodiment 1 of the present application will be described with reference to FIGS. 1 to 5.
  • FIG. 1 is a schematic structural view showing an imaging lens unit of Embodiment 1.
  • the imaging lens group includes six lenses.
  • the six lenses are a first lens E1 having an object side surface S1 and an image side surface S2, a second lens E2 having an object side surface S3 and an image side surface S4, and a third lens E3 having an object side surface S5 and an image side surface S6, respectively.
  • the first lens E1 to the sixth lens E6 are disposed in order from the object side to the image side of the imaging lens group.
  • the first lens E1 may have positive refractive power, and the object side surface S1 may be a convex surface, and the image side surface S2 may be a concave surface.
  • the second lens E2 may have a negative refractive power, and the object side surface S3 may be a convex surface, and the image side surface S4 may be a concave surface.
  • the third lens E3 may have a negative refractive power, and the object side surface S5 may be a convex surface, and the image side surface S6 may be a concave surface.
  • the fourth lens E4 may have positive refractive power, and the object side surface S7 may be a concave surface, and the image side surface S8 may be a convex surface.
  • the fifth lens E5 may have positive refractive power, and the object side surface S9 may be a convex surface, and the image side surface S10 may be a convex surface.
  • the sixth lens E6 may have a positive power or a negative power, and the object side surface S11 may be a convex surface, and the image side surface S12 may be a concave surface.
  • the imaging lens group further includes a filter E7 having an object side S13 and an image side surface S14 for filtering out infrared light.
  • a filter E7 having an object side S13 and an image side surface S14 for filtering out infrared light.
  • light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.
  • the first to sixth lenses E1 to E6 have respective effective focal lengths f1 to f6.
  • the first lens E1 to the sixth lens E6 are sequentially arranged along the optical axis and collectively determine the total effective focal length f of the imaging lens group.
  • Table 1 below shows the effective focal lengths f1 to f6 of the first lens E1 to the sixth lens E6, the total effective focal length f of the imaging lens group, the total length TTL (mm) of the imaging lens group, and the maximum angle of view of the imaging lens group.
  • Table 2 shows the surface type, radius of curvature, thickness, material, and conical coefficient of each lens in the imaging lens group in this embodiment, in which the unit of curvature radius and thickness are both millimeters (mm).
  • each lens may be an aspherical lens, and each aspherical surface type x is defined by the following formula:
  • x is the distance of the aspherical surface at height h from the optical axis, and the distance from the aspherical vertex is high;
  • k is the conic coefficient (given in Table 2);
  • Ai is the correction coefficient of the a-th order of the aspherical surface.
  • Table 3 shows the high order term coefficients A 4 , A 6 , A 8 , A 10 , A 12 , A 14 and A 16 of the respective aspheric surfaces S1 - S12 of the respective aspherical lenses usable in this embodiment.
  • the imaging lens group according to Embodiment 1 is an imaging lens group including a glass lens and having improved imaging performance.
  • An imaging lens group according to Embodiment 2 of the present application will be described below with reference to FIGS. 6 to 10.
  • the imaging lens group described in the following embodiments is the same as the arrangement of the imaging lens group described in Embodiment 1.
  • a description similar to Embodiment 1 will be omitted for the sake of brevity.
  • Fig. 6 is a schematic structural view showing an imaging lens unit of Embodiment 2.
  • the imaging lens group includes, in order from the object side to the image side, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens E6.
  • the first lens E1 may have positive refractive power, and the object side surface S1 may be a convex surface, and the image side surface S2 may be a concave surface.
  • the second lens E2 may have a negative refractive power, and the object side surface S3 may be a convex surface, and the image side surface S4 may be a concave surface.
  • the third lens E3 may have positive refractive power, and the object side surface S5 may be a convex surface, and the image side surface S6 may be a convex surface.
  • the fourth lens E4 may have positive refractive power, and the object side surface S7 may be a concave surface, and the image side surface S8 may be a convex surface.
  • the fifth lens E5 may have positive refractive power, and the object side surface S9 may be a concave surface, and the image side surface S10 may be a convex surface.
  • the sixth lens E6 may have a negative refractive power, and the object side surface S11 may be a convex surface, and the image side surface S12 may be a concave surface.
  • Table 4 below shows the effective focal lengths f1 to f6 of the first lens E1 to the sixth lens E6, the total effective focal length f of the imaging lens group, the total length TTL of the imaging lens group, and half of the maximum angle of view of the imaging lens group HFOV .
  • Table 5 shows the surface type, radius of curvature, thickness, material, and conical coefficient of each lens in the imaging lens group in this embodiment, in which the unit of curvature radius and thickness are both millimeters (mm).
  • Table 6 below shows the high order term coefficients of the respective aspheric surfaces S1-S12 that can be used for each aspherical lens in this embodiment.
  • each aspherical surface type can be defined by the formula (1) given in the above embodiment 1.
  • Fig. 7 is a view showing an axial chromatic aberration curve of the imaging lens group of Embodiment 2, which shows that light rays of different wavelengths are deviated from a focus point after passing through the optical system.
  • Fig. 8 shows an astigmatism curve of the imaging lens group of Embodiment 2, which shows meridional field curvature and sagittal image plane curvature.
  • Fig. 9 is a view showing a distortion curve of the imaging lens group of Embodiment 2, which shows distortion magnitude values in the case of different viewing angles.
  • Fig. 10 is a graph showing the chromatic aberration of magnification of the imaging lens group of Embodiment 2, which shows the deviation of the different image heights on the imaging plane after the light rays pass through the imaging lens group.
  • the imaging lens group according to Embodiment 1 is an imaging lens group including a glass lens and having improved imaging performance.
  • Fig. 11 is a schematic structural view showing an imaging lens unit of Embodiment 3.
  • the imaging lens group includes, in order from the object side to the image side, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens E6.
  • the first lens E1 may have positive refractive power, and the object side surface S1 may be a convex surface, and the image side surface S2 may be a concave surface.
  • the second lens E2 may have a negative refractive power, and the object side surface S3 may be a convex surface, and the image side surface S4 may be a concave surface.
  • the third lens E3 may have a positive power, and the object side surface S5 may be a convex surface, and the image side surface S6 may be a concave surface.
  • the fourth lens E4 may have a positive power, and the object side surface S7 may be a convex surface, and the image side surface S8 may be a concave surface.
  • the fifth lens E5 may have positive refractive power, and the object side surface S9 may be a convex surface, and the image side surface S10 may be a convex surface.
  • the sixth lens E6 may have a negative refractive power, and the object side surface S11 may be a concave surface, and the image side surface S12 may be a concave surface.
  • Table 7 shows the effective focal lengths f1 to f6 of the first lens E1 to the sixth lens E6, the total effective focal length f of the imaging lens group, the total length TTL of the imaging lens group, and half of the maximum angle of view of the imaging lens group HFOV .
  • Table 8 shows the surface type, radius of curvature, thickness, material, and conical coefficient of each lens in the imaging lens group in this embodiment, in which the unit of curvature radius and thickness are both millimeters (mm).
  • Table 9 below shows the high order coefficient of each aspherical surface S1-S12 of each aspherical lens which can be used in this embodiment, wherein each aspherical surface type can be given by the formula (1) given in the above embodiment 1. limited.
  • Fig. 12 is a view showing an axial chromatic aberration curve of the imaging lens group of Embodiment 3, which shows that the light beams of different wavelengths are deviated from the focus point after passing through the optical system.
  • Fig. 13 is a view showing an astigmatism curve of the imaging lens group of Embodiment 3, which shows meridional field curvature and sagittal image plane curvature.
  • Fig. 14 is a view showing a distortion curve of the imaging lens group of Embodiment 3, which shows distortion magnitude values in the case of different viewing angles.
  • the imaging lens group according to Embodiment 1 is an imaging lens group including a glass lens and having improved imaging performance.
  • An imaging lens group according to Embodiment 4 of the present application will be described below with reference to FIGS. 16 to 20.
  • Fig. 16 is a schematic structural view showing an imaging lens unit of Embodiment 4.
  • the imaging lens group includes, in order from the object side to the image side, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens E6.
  • the first lens E1 may have positive refractive power, and the object side surface S1 may be a convex surface, and the image side surface S2 may be a concave surface.
  • the second lens E2 may have a negative refractive power, and the object side surface S3 may be a convex surface, and the image side surface S4 may be a concave surface.
  • the third lens E3 may have positive refractive power, and the object side surface S5 may be a convex surface, and the image side surface S6 may be a convex surface.
  • the fourth lens E4 may have a negative refractive power, and the object side surface S7 may be a concave surface, and the image side surface S8 may be a convex surface.
  • the fifth lens E5 may have positive refractive power, and the object side surface S9 may be a convex surface, and the image side surface S10 may be a concave surface.
  • the sixth lens E6 may have positive refractive power, and the object side surface S11 may be a convex surface, and the image side surface S12 may be a concave surface.
  • Table 10 below shows the effective focal lengths f1 to f6 of the first lens E1 to the sixth lens E6, the total effective focal length f of the imaging lens group, the total length TTL of the imaging lens group, and half of the maximum angle of view of the imaging lens group HFOV .
  • Table 11 below shows the surface type, radius of curvature, thickness, material, and conical coefficient of each lens in the imaging lens group in this embodiment, in which the unit of curvature radius and thickness are both millimeters (mm).
  • Table 12 below shows the high order coefficient of each aspherical surface S1-S12 which can be used for each aspherical lens in this embodiment, wherein each aspherical surface type can be given by the formula (1) given in the above embodiment 1. limited.
  • Fig. 17 is a view showing an axial chromatic aberration curve of the imaging lens group of Embodiment 4, which shows that the light beams of different wavelengths are deviated from the focus point after passing through the optical system.
  • Fig. 18 is a view showing an astigmatism curve of the imaging lens group of Embodiment 4, which shows meridional field curvature and sagittal image plane curvature.
  • Fig. 19 is a view showing a distortion curve of the imaging lens group of Embodiment 4, which shows distortion magnitude values in the case of different viewing angles.
  • the imaging lens group according to Embodiment 1 is an imaging lens group including a glass lens and having improved imaging performance.
  • An imaging lens group according to Embodiment 5 of the present application will be described below with reference to FIGS. 21 to 25.
  • the imaging lens group includes, in order from the object side to the image side, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, and a fifth lens E5.
  • the first lens E1 may have positive refractive power, and the object side surface S1 may be a convex surface, and the image side surface S2 may be a convex surface.
  • the second lens E2 may have a negative refractive power, and the object side surface S3 may be a concave surface, and the image side surface S4 may be a concave surface.
  • the third lens E3 may have positive refractive power, and the object side surface S5 may be a convex surface, and the image side surface S6 may be a convex surface.
  • the fourth lens E4 may have a negative refractive power, and the object side surface S7 may be a concave surface, and the image side surface S8 may be a concave surface.
  • the fifth lens E5 may have a negative refractive power, and the object side surface S9 may be a concave surface, and the image side surface S10 may be a convex surface.
  • Table 13 below shows the effective focal lengths f1 to f5 of the first to fifth lenses E1 to E5, the total effective focal length f of the imaging lens group, the total length TTL of the imaging lens group, and half of the maximum angle of view of the imaging lens group HFOV .
  • Table 14 below shows the surface type, radius of curvature, thickness, material, and conical coefficient of each lens in the imaging lens group in this embodiment, in which the unit of curvature radius and thickness are both millimeters (mm).
  • Table 15 below shows the high order term coefficients of the respective aspherical surfaces S1 to S12 which can be used for the respective aspherical lenses in this embodiment, wherein each aspherical surface type can be given by the formula (1) given in the above embodiment 1. limited.
  • Fig. 22 is a view showing the axial chromatic aberration curve of the imaging lens group of Embodiment 5, which shows that the light beams of different wavelengths are deviated from the focus point after passing through the optical system.
  • Fig. 23 is a view showing an astigmatism curve of the imaging lens group of Embodiment 5, which shows meridional field curvature and sagittal image plane curvature.
  • Fig. 24 is a view showing the distortion curve of the imaging lens group of Embodiment 5, which shows the distortion magnitude value in the case of different viewing angles.
  • the imaging lens group according to Embodiment 1 is an imaging lens group including a glass lens and having improved imaging performance.
  • FIG. 26 illustrates transmittances of imaging lens groups corresponding to respective wavelength bands according to an embodiment of the present disclosure.
  • the imaging lens group has a transmittance T1>85% corresponding to the 650 nm band, the transmittance T2>88% of the imaging lens group corresponding to the 490 nm band, and the transmittance T3>75% of the imaging lens group corresponding to the 430 nm band.
  • each conditional expression satisfies the conditions of Table 16 below.

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Abstract

一种成像透镜组，从物侧至像侧依序包括：第一透镜，第一透镜具有正光焦度且其物侧面为凸面；第二透镜，第二透镜具有负光焦度且其像侧面为凹面；以及至少一个后续透镜，其中，第一透镜、第二透镜和至少一个后续透镜中的至少一个透镜为玻璃非球面透镜，成像透镜组对应650nm波段的透过率T1>85％，成像透镜组对应490nm波段的透过率T2>88％，并且成像透镜组对应430nm波段的透过率T3>75％。成像透镜组包含至少一个玻璃非球面透镜，使得成像透镜组具有更高的成像亮度、通透性以及色彩还原性，从而能够极大地提升成像透镜组的性能。

Description

成像透镜组
相关申请的交叉引用
本申请要求于2017年9月18日提交至中国国家知识产权局(SIPO)的、专利申请号为201710838882.2的中国专利申请以及于2017年9月18日提交至SIPO的、专利申请号为201721190577.9的中国专利申请的优先权和权益，以上中国专利申请通过引用整体并入本文。
技术领域
本发明涉及一种成像透镜组，特别是涉及玻璃非球面的成像透镜组。
背景技术
目前，光学系统常用的感光元件有CCD(Charge-Coupled Device，感光耦合元件)及CMOS(Complementary Metal-Oxide Semiconductor，互补性氧化金属半导体元件)。随着这些常用感光元件性能的提高及尺寸减小，对相配套使用的摄像镜头的高成像品质及小型化提出了相应的要求。与此同时，人们对便携式电子产品的成像质量的要求越来越高，手机、平板电脑等电子产品将变得更薄、体积更小，这同样要求高成像品质及小型化的摄像镜头。
因此本发明旨在提供一种小型化且具有提升的成像品质的成像透镜组。
发明内容
为了解决现有技术中的至少一些问题，本发明提供了一种成像透镜组。
本发明的一个方面提供了一种成像透镜组，从该成像透镜组的物侧至像侧依序包括：第一透镜，所述第一透镜具有正光焦度且其物侧面为凸面；第二透镜，所述第二透镜具有负光焦度且其像侧面为凹面；以及至少一个后续透镜，其中，第一透镜、第二透镜和至少一个后续透镜中的至少一个 透镜为玻璃非球面透镜，成像透镜组对应650nm波段的透过率T1>85％，成像透镜组对应490nm波段的透过率T2>88％，成像透镜组对应430nm波段的透过率T3>75％。
根据本发明的一个实施方式，玻璃非球面透镜的单位温度对单位折射率的影响率dng/dt与最靠近像侧的透镜的单位温度对单位折射率的影响率dni/dt之间满足|dng/dt|/|dni/dt|<0.1。
根据本发明的一个实施方式，玻璃非球面透镜的色散系数Vg与最靠近像侧的透镜的色散系数Vi之间满足0.35<Vg/Vi<1.5。
根据本发明的一个实施方式，玻璃非球面透镜的折射率Ng满足1.5≤Ng≤2.0。
根据本发明的一个实施方式，成像透镜组的有效焦距f与成像透镜组的入瞳直径之间满足1.5<f/EPD<2.5。
根据本发明的一个实施方式，成像透镜组的有效焦距f与玻璃非球面透镜的有效焦距fg之间满足-0.6<f/fg<1.2。
根据本发明的一个实施方式，成像透镜组的有效焦距f与第一透镜物侧面的曲率半径R1之间满足2<f/R1<4。
根据本发明的一个实施方式，第一透镜物侧面的曲率半径R1与第二透镜像侧面的曲率半径R4之间满足0<R1/R4<1.0。
本发明的另一个方面提供了这样一种成像透镜组，该成像透镜组从成像透镜组的物侧至像侧依序包括：第一透镜；第二透镜；以及至少一个后续透镜，其中，第一透镜、第二透镜和至少一个后续透镜中的至少一个透镜为玻璃非球面透镜，并且玻璃非球面透镜的单位温度对单位折射率的影响率dng/dt与最靠近像侧的透镜的单位温度对单位折射率的影响率dni/dt之间满足|dng/dt|/|dni/dt|<0.1。
根据本发明的一个实施方式，第一透镜具有正光焦度且其物侧面为凸面，并且第二透镜具有负光焦度且其像侧面为凹面。
本发明的另一个方面提供了这样一种成像透镜组，所述成像透镜组从所述成像透镜组的物侧至像侧依序包括：第一透镜，所述第一透镜具有正光焦度且其物侧面为凸面；第二透镜，所述第二透镜具有负光焦度且其像侧面为凹面；以及至少一个后续透镜，其中，第一透镜、第二透镜和至少 一个后续透镜中的至少一个透镜为玻璃非球面透镜，成像透镜组的有效焦距f与第一透镜物侧面的曲率半径R1之间满足2<f/R1<4。
在一个实施方式中，上述至少一个后续透镜沿光轴由第二透镜至像侧依序包括：第三透镜、第四透镜和第五透镜，第三透镜可具有正光焦度；第四透镜可具有负光焦度；以及第五透镜可具有负光焦度。
在一个实施方式中，上述至少一个后续透镜沿光轴由第二透镜至像侧依序包括：第三透镜、第四透镜，第五透镜和第六透镜，第三透镜可具有正光焦度或负光焦度；第四透镜可具有正光焦度或负光焦度；第五透镜可具有正光焦度或负光焦度；以及第六透镜可具有正光焦度或负光焦度。
根据本发明的一个实施方式，玻璃非球面透镜的色散系数Vg与最靠近像侧的透镜的色散系数Vi之间满足0.35<Vg/Vi<1.5。
根据本发明的一个实施方式，玻璃非球面透镜的折射率Ng满足1.5≤Ng≤2.0。
根据本发明的一个实施方式，成像透镜组的有效焦距f与成像透镜组的入瞳直径之间满足1.5<f/EPD<2.5。
根据本发明的一个实施方式，成像透镜组的有效焦距f与玻璃非球面透镜的有效焦距fg之间满足-0.6<f/fg<1.2。
根据本发明的一个实施方式，第一透镜物侧面的曲率半径R1与第二透镜像侧面的曲率半径R4之间满足0<R1/R4<1.0。
根据本发明的成像透镜组包含至少一个玻璃非球面透镜，使得成像透镜组具有更高的成像亮度、通透性以及色彩还原性，从而能够极大的提升成像透镜组的性能。
附图说明
结合附图，通过以下非限制性实施方式的详细描述，本发明的其它特征、目的和优点将变得更加明显。在附图中：
图1示出了实施例1的成像透镜组的结构示意图；
图2至图5分别示出了实施例1的成像透镜组的轴上色差曲线、象散曲线、畸变曲线和倍率色差曲线；
图6示出了实施例2的成像透镜组的结构示意图；
图7至图10分别示出了实施例2的成像透镜组的轴上色差曲线、象散曲线、畸变曲线和倍率色差曲线；
图11示出了实施例3的成像透镜组的结构示意图；
图12至图15分别示出了实施例3的成像透镜组的轴上色差曲线、象散曲线、畸变曲线和倍率色差曲线；
图16示出了实施例4的成像透镜组的结构示意图；
图17至图20分别示出了实施例4的成像透镜组的轴上色差曲线、象散曲线、畸变曲线和倍率色差曲线；
图21示出了实施例5的成像透镜组的结构示意图；
图22至图25分别示出了实施例5的成像透镜组的轴上色差曲线、象散曲线、畸变曲线和倍率色差曲线；以及
图26示出了根据本公开实施例的成像透镜组对应各波段的透过率。
具体实施方式
下面结合附图和实施例对本申请作进一步的详细说明。可以理解的是，此处所描述的具体实施例仅仅用于解释相关发明，而非对该发明的限定。另外还需要说明的是，为了便于描述，附图中仅示出了与有关发明相关的部分。
应理解的是，在本申请中，当元件或层被描述为在另一元件或层“上”、“连接至”或“联接至”另一元件或层时，其可直接在另一元件或层上、直接连接至或联接至另一元件或层，或者可存在介于中间的元件或层。当元件称为“直接位于”另一元件或层“上”、“直接连接至”或“直接联接至”另一元件或层时，不存在介于中间的元件或层。在说明书全文中，相同的标号指代相同的元件。如本文中使用的，用语“和/或”包括相关联的所列项目中的一个或多个的任何和全部组合。
应理解的是，虽然用语第1、第2或第一、第二等在本文中可以用来描述各种元件、部件、区域、层和/或段，但是这些元件、部件、区域、层和/或段不应被这些用语限制。这些用语仅用于将一个元件、部件、区域、层或段与另一个元件、部件、区域、层或段区分开。因此，在不背离本申请 的教导的情况下，下文中讨论的第一元件、部件、区域、层或段可被称作第二元件、部件、区域、层或段。
本文中使用的用辞仅用于描述具体实施方式的目的，并不旨在限制本申请。如在本文中使用的，除非上下文中明确地另有指示，否则没有限定单复数形式的特征也意在包括复数形式的特征。还应理解的是，用语“包括”、“包括有”、“具有”、“包含”和/或“包含有”，当在本说明书中使用时表示存在所陈述的特征、整体、步骤、操作、元件和/或部件，但不排除存在或添加一个或多个其它特征、整体、步骤、操作、元件、部件和/或它们的组。如在本文中使用的，用语“和/或”包括相关联的所列项目中的一个或多个的任何和全部组合。诸如“...中的至少一个”的表述当出现在元件的列表之后时，修饰整个元件列表，而不是修饰列表中的单独元件。此外，当描述本申请的实施方式时，使用“可以”表示“本申请的一个或多个实施方式”。并且，用语“示例性的”旨在指代示例或举例说明。
除非另外限定，否则本文中使用的所有用语(包括技术用语和科学用语)均具有与本申请所属领域普通技术人员的通常理解相同的含义。还应理解的是，用语(例如在常用词典中定义的用语)应被解释为具有与它们在相关技术的上下文中的含义一致的含义，并且将不被以理想化或过度正式意义解释，除非本文中明确如此限定。
需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互组合。下面将参考附图并结合实施例来详细说明本申请。
本申请提供了一种成像透镜组。根据本申请的成像透镜组从成像透镜组的物侧至像侧依序设置有：具有正光焦度的第一透镜、具有负光焦度第二透镜和至少一个后续透镜。在本申请的实施例中，第一透镜的物侧面为凸面，第二透镜的像侧面为凹面。在本申请的实施例中，第一透镜、第二透镜和至少一个后续透镜中的至少一个透镜为玻璃非球面透镜。
在一个实施方式中，上述至少一个后续透镜沿光轴由第二透镜至像侧依序包括：第三透镜、第四透镜和第五透镜，第三透镜可具有正光焦度；第四透镜可具有负光焦度；以及第五透镜可具有负光焦度。
在一个实施方式中，上述至少一个后续透镜沿光轴由第二透镜至像 侧依序包括：第三透镜、第四透镜，第五透镜和第六透镜，第三透镜可具有正光焦度或负光焦度；第四透镜可具有正光焦度或负光焦度；第五透镜可具有正光焦度或负光焦度；以及第六透镜可具有正光焦度或负光焦度。
在本申请的实施例中，成像透镜组对应650nm波段的透过率T1>85％，成像透镜组对应490nm波段的透过率T2>88％，以及成像透镜组对应430nm波段的透过率T3>75％。本申请的成像透镜组中使用玻璃材料的光学镜片，使得镜头具有更高的透过率，成像时具有更高的亮度、通透性以及色彩还原性能。
在本申请的实施例中，玻璃非球面透镜的单位温度对单位折射率的影响率dng/dt与最靠近像侧的透镜的单位温度对单位折射率的影响率dni/dt之间满足|dng/dt|/|dni/dt|<0.1，更具体地，满足|dng/dt|/|dni/dt|≤0.03。通过满足上述关系，可以确保镜头在不同温度下仍然具有较高的解像力，降低了镜头对温度的敏感性。
在本申请的实施例中，玻璃非球面透镜的色散系数Vg与最靠近像侧的透镜的色散系数Vi之间满足0.35<Vg/Vi<1.5，更具体地，满足0.37≤Vg/Vi≤1.46。本申请的成像透镜组中使用玻璃镜片，通过满足上述关系合理分配玻璃的色散系数，有利于大大降低光学系统的色差。
在本申请的实施例中，玻璃非球面透镜的折射率Ng满足1.5≤Ng≤2.0，更具体地，满足1.5≤Ng≤1.92。通过满足上述关系，合理选择玻璃的折射率范围，避免使用高价格玻璃，保证镜头的成本。
在本申请的实施例中，成像透镜组的有效焦距f与成像透镜组的入瞳直径之间满足1.5<f/EPD<2.5，更具体地，满足1.68≤f/EPD≤2.28。满足上述关系的成像透镜组拥有更大的光通量，使得镜头获取足够高的亮度。
在本申请的实施例中，成像透镜组的有效焦距f与玻璃非球面透镜的有效焦距fg之间满足-0.6<f/fg<1.2，更具体地，满足-0.52≤f/fg≤1.05。通过满足上述关系，能够合理分配玻璃镜片在整个系统的光焦度，使得系统获取更高的MTF性能。
在本申请的实施例中，成像透镜组的有效焦距f与第一透镜物侧面的曲率半径R1之间满足2<f/R1<4，更具体地，满足2.35≤f/R1≤3.85。通过满 足上述关系，将第一透镜的物侧曲率设置在合理的范围内，确保整体镜头有较好的公差感度，匹配加工能力。
在本申请的实施例中，第一透镜物侧面的曲率半径R1与第二透镜像侧面的曲率半径R4之间满足0<R1/R4<1.0，更具体地，满足0.43≤R1/R4≤0.91。通过满足上述关系，能够有效搭配第一透镜和第二透镜的曲率，从而可以减小系统的垂轴色差，确保芯片使用过程中的色彩还原不受影响。
以下结合具体实施例进一步描述本申请。
实施例1
首先参照图1至图5描述根据本申请实施例1的成像透镜组。
图1为示出了实施例1的成像透镜组的结构示意图。如图1所示，成像透镜组包括6片透镜。这6片透镜分别为具有物侧面S1和像侧面S2的第一透镜E1、具有物侧面S3和像侧面S4的第二透镜E2、具有物侧面S5和像侧面S6的第三透镜E3、具有物侧面S7和像侧面S8的第四透镜E4、具有物侧面S9和像侧面S10的第五透镜E5以及具有物侧面S11和像侧面S12的第六透镜E6。第一透镜E1至第六透镜E6从成像透镜组的物侧到像侧依次设置。
第一透镜E1可具有正光焦度，且其物侧面S1可为凸面，像侧面S2为凹面。
第二透镜E2可具有负光焦度，且其物侧面S3可为凸面，像侧面S4可为凹面。
第三透镜E3可具有负光焦度，且其物侧面S5可为凸面，像侧面S6可为凹面。
第四透镜E4可具有正光焦度，且其物侧面S7可为凹面，像侧面S8可为凸面。
第五透镜E5可具有正光焦度，且其物侧面S9可为凸面，像侧面S10可为凸面。
第六透镜E6可具有正光焦度或负光焦度，且其物侧面S11可为凸面，像侧面S12可为凹面。
该成像透镜组还包括用于滤除红外光的具有物侧面S13和像侧面S14 的滤光片E7。在该实施例中，来自物体的光依次穿过各表面S1至S14并最终成像在成像表面S15上。
在该实施例中，第一透镜E1至第六透镜E6分别具有各自的有效焦距f1至f6。第一透镜E1至第六透镜E6沿着光轴依次排列并共同决定了成像透镜组的总有效焦距f。下表1示出了第一透镜E1至第六透镜E6的有效焦距f1至f6、成像透镜组的总有效焦距f、成像透镜组的总长度TTL(mm)以及成像透镜组的最大视场角的一半HFOV。
f1(mm) 3.80 f(mm) 3.98
f2(mm) -13.15 TTL(mm) 4.75
f3(mm) -799.36 HFOV(°) 37.2
f4(mm) 4.59    
f5(mm) 62.19    
f6(mm) -3.27    
表1
表2示出了该实施例中的成像透镜组中各透镜的表面类型、曲率半径、厚度、材料和圆锥系数，其中，曲率半径和厚度的单位均为毫米(mm)。
Figure PCTCN2018084210-appb-000001
表2
在本实施例中，各透镜均可采用非球面透镜，各非球面面型x由以下公式限定：
Figure PCTCN2018084210-appb-000002
其中，x为非球面沿光轴方向在高度为h的位置时，距非球面顶点的距离矢高；c为非球面的近轴曲率，c＝1/R(即，近轴曲率c为上表1中曲率半径R的倒数)；k为圆锥系数(在表2中已给出)；Ai是非球面第i-th阶的修正系数。
下表3示出了可用于该实施例中的各非球面透镜的各非球面S1-S12的高次项系数A 4、A 6、A 8、A 10、A 12、A 14和A 16。
面号 A4 A6 A8 A10 A12 A14 A16
S1 6.7997E-02 -1.0838E-02 -1.3608E-02 2.6747E-02 -2.8199E-02 -2.7550E-03 0
S2 -1.2817E-01 1.9200E-01 -2.0493E-01 9.1988E-02 -7.8504E-03 -1.4426E-04 0
S3 -1.1770E-01 2.5939E-01 -2.3979E-01 2.0491E-01 -2.5180E-01 -7.7637E-02 0
S4 6.8034E-02 -6.1153E-02 3.9792E-01 -8.4952E-01 1.1184E+00 3.3172E-01 0
S5 -1.2157E-01 -1.0010E-01 5.6687E-01 -1.6551E+00 2.6813E+00 8.1982E-01 0
S6 -8.1545E-02 1.2847E-02 -1.9958E-01 3.3446E-01 -2.9092E-01 -1.8820E-02 0
S7 1.8502E-02 1.7304E-01 -4.7368E-01 4.7737E-01 -2.6772E-01 7.4387E-02 -6.8273E-03
S8 -4.9933E-03 1.0585E-01 -2.7614E-01 2.9143E-01 -1.5441E-01 -4.1718E-03 0
S9 1.7488E-01 -3.7184E-01 2.4379E-01 -9.9592E-02 3.0269E-02 4.5700E-04 0
S10 1.8257E-01 -3.7618E-01 2.7075E-01 -1.1502E-01 3.0228E-02 2.6014E-04 0
S11 -2.4321E-01 3.2139E-02 6.8480E-02 -4.0675E-02 1.0132E-02 5.7167E-05 0
S12 -1.9844E-01 1.2031E-01 -4.3468E-02 9.5673E-03 -1.2854E-03 -2.6916E-06 0
表3
图2示出了实施例1的成像透镜组的轴上色差曲线，其表示不同波长的光线经由光学系统后的会聚焦点偏离。图3示出了实施例1的成像透镜组的象散曲线，其表示子午像面弯曲和弧矢像面弯曲。图4示出了实施例1的成像透镜组的畸变曲线，其表示不同视角情况下的畸变大小值。图5示出了实施例1的成像透镜组的倍率色差曲线，其表示光线经由成像透镜组后在成像面上的不同的像高的偏差。综上所述并参照图2至图5可以看出，根据实施例1的成像透镜组是一种包含有玻璃透镜、具有提升的成像性能的成像透镜组。
实施例2
以下参照图6至图10描述根据本申请实施例2的成像透镜组。除了成像透镜组的各透镜的参数之外，例如除了各透镜的曲率半径、厚度、材料、圆锥系数、有效焦距、轴上间距、各透镜的高次项系数等之外，在本实施例2及以下各实施例中描述的成像透镜组与实施例1中描述的成像透镜组的布置结构相同。在本实施例及以下实施例中，为简洁起见，将省略部分与实施例1相似的描述。
图6为示出了实施例2的成像透镜组的结构示意图。成像透镜组由物侧至像侧依次包括第一透镜E1、第二透镜E2、第三透镜E3、第四透镜E4、第五透镜E5以及第六透镜E6。
第一透镜E1可具有正光焦度，且其物侧面S1可为凸面，像侧面S2为凹面。
第二透镜E2可具有负光焦度，且其物侧面S3可为凸面，像侧面S4可为凹面。
第三透镜E3可具有正光焦度，且其物侧面S5可为凸面，像侧面S6可为凸面。
第四透镜E4可具有正光焦度，且其物侧面S7可为凹面，像侧面S8可为凸面。
第五透镜E5可具有正光焦度，且其物侧面S9可为凹面，像侧面S10可为凸面。
第六透镜E6可具有负光焦度，且其物侧面S11可为凸面，像侧面S12可为凹面。
下表4示出了第一透镜E1至第六透镜E6的有效焦距f1至f6、成像透镜组的总有效焦距f、成像透镜组的总长度TTL以及成像透镜组的最大视场角的一半HFOV。
f1(mm) 3.84 f(mm) 3.95
f2(mm) -7.64 TTL(mm) 4.74
f3(mm) 12.86 HFOV(°) 36.9
f4(mm) 5.44    
f5(mm) 24.57    
f6(mm) -3.20    
表4
表5示出了该实施例中的成像透镜组中各透镜的表面类型、曲率半径、厚度、材料和圆锥系数，其中，曲率半径和厚度的单位均为毫米(mm)。
Figure PCTCN2018084210-appb-000003
表5
下表6示出了可用于该实施例中的各非球面透镜的各非球面S1-S12的高次项系数。其中，各非球面面型可由上述实施例1中给出的公式(1)限定。
面号 A4 A6 A8 A10 A12 A14 A16
S1 5.9884E-02 1.2520E-02 -7.1245E-02 1.4101E-01 -1.5030E-01 8.2919E-02 -1.9445E-02
S2 -1.7031E-01 3.5300E-01 -4.9955E-01 5.3066E-01 -4.0669E-01 1.8440E-01 -3.6780E-02
S3 -8.2834E-02 1.7005E-01 -1.3630E-01 5.3446E-02 -9.8162E-03 0 0
S4 4.3748E-02 4.8250E-02 -1.6099E-02 1.0532E-02 0 0 0
S5 -8.0300E-02 2.6901E-02 -8.0864E-02 1.5107E-01 -1.1364E-01 2.3530E-02 2.0176E-02
S6 -6.5578E-02 3.9312E-02 -2.3502E-01 3.1615E-01 -1.8188E-01 2.0441E-02 1.7567E-02
S7 -9.1358E-03 2.5500E-01 -5.5098E-01 4.8140E-01 -2.0903E-01 3.2763E-02 1.7135E-03
S8 2.3723E-02 1.3952E-01 -4.4187E-01 4.6780E-01 -2.3769E-01 5.9287E-02 -5.8798E-03
S9 2.4015E-01 -3.7778E-01 1.6217E-01 -1.8838E-02 -4.1738E-03 1.3279E-03 -1.0689E-04
S10 2.2254E-01 -3.6616E-01 2.1163E-01 -6.7669E-02 1.3330E-02 -1.5119E-03 7.4009E-05
S11 -2.5460E-01 3.1826E-02 6.4993E-02 -3.4925E-02 7.7475E-03 -8.1718E-04 3.3285E-05
S12 -1.9219E-01 1.0351E-01 -3.0228E-02 4.1863E-03 -1.2383E-04 -3.0892E-05 2.5932E-06
表6
图7示出了实施例2的成像透镜组的轴上色差曲线，其表示不同波长的光线经由光学系统后的会聚焦点偏离。图8示出了实施例2的成像透镜组的象散曲线，其表示子午像面弯曲和弧矢像面弯曲。图9示出了实施例2的成像透镜组的畸变曲线，其表示不同视角情况下的畸变大小值。图10示出了实施例2的成像透镜组的倍率色差曲线，其表示光线经由成像透镜组后在成像面上的不同的像高的偏差。综上所述并参照图7至图10可以看出，根据实施例1的成像透镜组是一种包含有玻璃透镜、具有提升的成像性能的成像透镜组。
实施例3
以下参照图11至图15描述根据本申请实施例3的成像透镜组。
图11为示出了实施例3的成像透镜组的结构示意图。成像透镜组由物侧至像侧依次包括第一透镜E1、第二透镜E2、第三透镜E3、第四透镜E4、第五透镜E5以及第六透镜E6。
第一透镜E1可具有正光焦度，且其物侧面S1可为凸面，像侧面S2为凹面。
第二透镜E2可具有负光焦度，且其物侧面S3可为凸面，像侧面S4可为凹面。
第三透镜E3可具有正光焦度，且其物侧面S5可为凸面，像侧面S6可为凹面。
第四透镜E4可具有正光焦度，且其物侧面S7可为凸面，像侧面S8可为凹面。
第五透镜E5可具有正光焦度，且其物侧面S9可为凸面，像侧面S10可为凸面。
第六透镜E6可具有负光焦度，且其物侧面S11可为凹面，像侧面S12可为凹面。
下表7示出了第一透镜E1至第六透镜E6的有效焦距f1至f6、成像透镜组的总有效焦距f、成像透镜组的总长度TTL以及成像透镜组的最大视场角的一半HFOV。
f1(mm) 5.87 f(mm) 3.89
f2(mm) -6.27 TTL(mm) 4.73
f3(mm) 4.13 HFOV(°) 38.0
f4(mm) -42.33    
f5(mm) 2.31    
f6(mm) -1.89    
表7
表8示出了该实施例中的成像透镜组中各透镜的表面类型、曲率半径、厚度、材料和圆锥系数，其中，曲率半径和厚度的单位均为毫米(mm)。
Figure PCTCN2018084210-appb-000004
表8
下表9示出了可用于该实施例中的各非球面透镜的各非球面S1-S12的高次项系数，其中，各非球面面型可由上述实施例1中给出的公式(1)限定。
面号 A4 A6 A8 A10 A12 A14 A16 A18
S1 6.7750E-02 -2.3812E-02 -7.1382E-03 1.6614E-02 -1.7261E-02 5.2311E-03 0 0
S2 9.5732E-02 -2.1355E-01 1.3275E-01 -2.9433E-02 0 0 0 0
S3 5.0053E-02 -1.5870E-01 1.4302E-01 -4.3142E-02 0 0 0 0
S4 -2.1995E-02 1.3891E-02 6.0708E-02 -5.2138E-02 0 0 0 0
S5 -2.5279E-02 3.5894E-02 -2.7905E-02 2.0346E-02 -1.0814E-02 0 0 0
S6 2.5036E-02 -3.4922E-02 0 0 0 0 0 0
S7 -1.1380E-01 5.7022E-02 -1.6606E-01 1.4740E-01 -6.8711E-02 0 0 0
S8 -8.9880E-02 7.4402E-03 -1.8637E-02 5.6152E-02 -1.0948E-01 1.1187E-01 -5.0281E-02 8.0165E-03
S9 3.3858E-03 5.8082E-03 -2.6128E-01 5.0754E-01 -4.9163E-01 2.5871E-01 -6.9584E-02 7.4651E-03
S10 4.8112E-01 -7.3920E-01 6.8320E-01 -3.3116E-01 7.3466E-02 -1.1625E-03 -2.2888E-03 2.8050E-04
S11 6.2838E-02 -4.4983E-01 5.7784E-01 -3.4371E-01 1.1367E-01 -2.1632E-02 2.2277E-03 -9.6542E-05
S12 -1.4238E-01 7.9143E-02 -2.7097E-02 4.4431E-03 1.5017E-04 -1.9761E-04 3.0840E-05 -1.5870E-06
表9
图12示出了实施例3的成像透镜组的轴上色差曲线，其表示不同波长的光线经由光学系统后的会聚焦点偏离。图13示出了实施例3的成像透镜组的象散曲线，其表示子午像面弯曲和弧矢像面弯曲。图14示出了实施例3的成像透镜组的畸变曲线，其表示不同视角情况下的畸变大小值。图15示出了实施例3的成像透镜组的倍率色差曲线，其表示光线经由成像透镜组后在成像面上的不同的像高的偏差。综上所述并参照图12至图15可以看出，根据实施例1的成像透镜组是一种包含有玻璃透镜、具有提升的成像性能的成像透镜组。
实施例4
以下参照图16至图20描述根据本申请实施例4的成像透镜组。
图16为示出了实施例4的成像透镜组的结构示意图。成像透镜组由物侧至像侧依次包括第一透镜E1、第二透镜E2、第三透镜E3、第四透镜E4、第五透镜E5以及第六透镜E6。
第一透镜E1可具有正光焦度，且其物侧面S1可为凸面，像侧面S2为凹面。
第二透镜E2可具有负光焦度，且其物侧面S3可为凸面，像侧面S4可为凹面。
第三透镜E3可具有正光焦度，且其物侧面S5可为凸面，像侧面S6可为凸面。
第四透镜E4可具有负光焦度，且其物侧面S7可为凹面，像侧面S8可为凸面。
第五透镜E5可具有正光焦度，且其物侧面S9可为凸面，像侧面S10可为凹面。
第六透镜E6可具有正光焦度，且其物侧面S11可为凸面，像侧面S12 可为凹面。
下表10示出了第一透镜E1至第六透镜E6的有效焦距f1至f6、成像透镜组的总有效焦距f、成像透镜组的总长度TTL以及成像透镜组的最大视场角的一半HFOV。
f1(mm) 3.15 f(mm) 3.87
f2(mm) -7.63 TTL(mm) 4.74
f3(mm) 17.97 HFOV(°) 38.2
f4(mm) -9.05    
f5(mm) 37.91    
f6(mm) 48.11    
表10
下表11示出了该实施例中的成像透镜组中各透镜的表面类型、曲率半径、厚度、材料和圆锥系数，其中，曲率半径和厚度的单位均为毫米(mm)。
Figure PCTCN2018084210-appb-000005
表11
下表12示出了可用于该实施例中的各非球面透镜的各非球面S1-S12的高次项系数，其中，各非球面面型可由上述实施例1中给出的公式(1)限定。
面号 A4 A6 A8 A10 A12 A14 A16 A18
S1 -1.9643E-04 1.6067E-02 -5.9355E-02 1.0605E-01 -1.1519E-01 6.5562E-02 -1.7706E-02 0
S2 -1.6190E-01 4.8961E-01 -9.2555E-01 1.1240E+00 -8.8060E-01 3.8731E-01 -7.2572E-02 0
S3 -1.3350E-01 4.9099E-01 -8.2777E-01 9.3341E-01 -6.6444E-01 2.6096E-01 -3.8602E-02 0
S4 -1.4808E-01 2.7510E-01 -5.2166E-01 9.0345E-01 -1.2865E+00 1.1443E+00 -4.7310E-01 0
S5 -7.4480E-02 2.8545E-03 3.7393E-05 0 0 0 0 0
S6 -1.2979E-01 1.0410E-01 -6.5088E-02 1.5827E-02 0 0 0 0
S7 -4.0144E-01 8.4853E-01 -8.7142E-01 4.8978E-01 -1.2425E-01 0 0 0
S8 -6.0503E-01 1.3052E+00 -1.7762E+00 1.6009E+00 -9.2136E-01 3.2726E-01 -6.6200E-02 5.8914E-03
S9 4.3662E-02 -5.3281E-03 -1.7167E-01 1.6269E-01 -6.3587E-02 1.1855E-02 -8.8915E-04 3.3740E-06
S10 1.3968E-01 -1.6453E-01 6.6218E-02 -2.0248E-02 7.7628E-03 -2.4910E-03 4.3817E-04 -3.0728E-05
S11 -3.6439E-01 3.3879E-01 -2.3307E-01 1.0160E-01 -2.6410E-02 3.9896E-03 -3.2278E-04 1.0719E-05
S12 -3.2822E-01 2.6145E-01 -1.6209E-01 6.7374E-02 -1.7734E-02 2.8088E-03 -2.4262E-04 8.7469E-06
表12
图17示出了实施例4的成像透镜组的轴上色差曲线，其表示不同波长的光线经由光学系统后的会聚焦点偏离。图18示出了实施例4的成像透镜组的象散曲线，其表示子午像面弯曲和弧矢像面弯曲。图19示出了实施例4的成像透镜组的畸变曲线，其表示不同视角情况下的畸变大小值。图20示出了实施例4的成像透镜组的倍率色差曲线，其表示光线经由成像透镜组后在成像面上的不同的像高的偏差。综上所述并参照图17至图20可以看出，根据实施例1的成像透镜组是一种包含有玻璃透镜、具有提升的成像性能的成像透镜组。
实施例5
以下参照图21至图25描述根据本申请实施例5的成像透镜组。
图21为示出了实施例5的成像透镜组的结构示意图。成像透镜组由物侧至像侧依次包括第一透镜E1、第二透镜E2、第三透镜E3、第四透镜E4以及第五透镜E5。
第一透镜E1可具有正光焦度，且其物侧面S1可为凸面，像侧面S2为凸面。
第二透镜E2可具有负光焦度，且其物侧面S3可为凹面，像侧面S4可为凹面。
第三透镜E3可具有正光焦度，且其物侧面S5可为凸面，像侧面S6可为凸面。
第四透镜E4可具有负光焦度，且其物侧面S7可为凹面，像侧面S8可 为凹面。
第五透镜E5可具有负光焦度，且其物侧面S9可为凹面，像侧面S10可为凸面。
下表13示出了第一透镜E1至第五透镜E5的有效焦距f1至f5、成像透镜组的总有效焦距f、成像透镜组的总长度TTL以及成像透镜组的最大视场角的一半HFOV。
f1(mm) 2.60 f(mm) 7.19
f2(mm) -3.20 TTL(mm) 6.40
f3(mm) 8.38 HFOV(°) 16.1
f4(mm) -5.93    
f5(mm) -13.60    
表13
下表14示出了该实施例中的成像透镜组中各透镜的表面类型、曲率半径、厚度、材料和圆锥系数，其中，曲率半径和厚度的单位均为毫米(mm)。
Figure PCTCN2018084210-appb-000006
表14
下表15示出了可用于该实施例中的各非球面透镜的各非球面S1-S12的高次项系数，其中，各非球面面型可由上述实施例1中给出的公式(1)限定。
面号 A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 3.7194E-03 9.0984E-03 -1.5246E-02 2.2521E-02 -2.1619E-02 1.3679E-02 -5.4712E-03 1.2650E-03 -1.3064E-04
S2 -2.3425E-02 2.5578E-01 -6.3400E-01 8.2060E-01 -6.4205E-01 3.1721E-01 -9.7532E-02 1.7132E-02 -1.3185E-03
S3 -2.4665E-02 2.9247E-01 -7.8391E-01 1.0842E+00 -8.9400E-01 4.6014E-01 -1.4555E-01 2.5959E-02 -1.9947E-03
S4 1.2252E-01 -1.3913E-01 4.3799E-01 -1.4254E+00 2.8749E+00 -3.4342E+00 2.4228E+00 -9.3833E-01 1.5476E-01
S5 -5.3579E-02 7.5157E-04 -1.8154E-01 2.5464E-01 -2.1792E-01 9.7129E-02 -1.5753E-02 0 0
S6 -5.8545E-02 -2.0826E-02 -5.3441E-02 7.6002E-02 -3.8984E-02 1.0369E-03 4.5318E-03 0 0
S7 -6.4303E-02 1.1747E-01 -4.1306E-02 -5.8346E-03 6.0975E-03 -1.1967E-03 7.5596E-05 0 0
S8 4.8062E-02 5.3285E-02 1.8623E-02 -5.1790E-02 2.8952E-02 -7.6647E-03 7.7675E-04 0 0
S9 -2.0485E-01 9.7262E-02 -5.8755E-02 2.4421E-02 -4.8151E-03 4.0768E-04 -1.0561E-05 0 0
S10 -1.9494E-01 9.9115E-02 -5.7283E-02 2.1529E-02 -4.1722E-03 1.7479E-04 3.0156E-05 0 0
表15
图22示出了实施例5的成像透镜组的轴上色差曲线，其表示不同波长的光线经由光学系统后的会聚焦点偏离。图23示出了实施例5的成像透镜组的象散曲线，其表示子午像面弯曲和弧矢像面弯曲。图24示出了实施例5的成像透镜组的畸变曲线，其表示不同视角情况下的畸变大小值。图25示出了实施例5的成像透镜组的倍率色差曲线，其表示光线经由成像透镜组后在成像面上的不同的像高的偏差。综上所述并参照图22至图25可以看出，根据实施例1的成像透镜组是一种包含有玻璃透镜、具有提升的成像性能的成像透镜组。
图26示出了根据本公开实施例的成像透镜组对应各波段的透过率。如图所示，成像透镜组对应650nm波段的透过率T1>85％，成像透镜组对应490nm波段的透过率T2>88％，成像透镜组对应430nm波段的透过率T3>75％。
概括地说，在上述实施例1至5中，各条件式满足下面表16的条件。
条件式/实施例 1 2 3 4 5
|dng/dt|/|dni/dt| 0.06 0.03 0.05 0.05 0.03
Vg/Vi 1.46 0.37 0.95 0.95 0.55
Ng 1.50 1.92 1.69 1.69 1.68
f/EPD 1.68 1.68 1.69 1.69 2.28
f/fg 1.05 -0.52 0.94 0.22 0.86
f/R1 2.45 2.38 2.35 2.52 3.85
R1/R4 0.77 0.84 0.91 0.71 0.43
表16
以上描述仅为本申请的较佳实施例以及对所运用技术原理的说明。 本领域技术人员应当理解，本申请中所涉及的发明范围，并不限于上述技术特征的特定组合而成的技术方案，同时也应涵盖在不脱离所述发明构思的情况下，由上述技术特征或其等同特征进行任意组合而形成的其它技术方案。例如上述特征与本申请中公开的(但不限于)具有类似功能的技术特征进行互相替换而形成的技术方案。

Claims (25)

  1. 一种成像透镜组，所述成像透镜组从所述成像透镜组的物侧至像侧依序包括：
    第一透镜，所述第一透镜具有正光焦度且其物侧面为凸面；
    第二透镜，所述第二透镜具有负光焦度且其像侧面为凹面；以及
    至少一个后续透镜，
    其特征在于，
    所述第一透镜、所述第二透镜和所述至少一个后续透镜中的至少一个透镜为玻璃非球面透镜，
    所述成像透镜组对应650nm波段的透过率T1>85％，
    所述成像透镜组对应490nm波段的透过率T2>88％，
    所述成像透镜组对应430nm波段的透过率T3>75％。
  2. 根据权利要求1所述的成像透镜组，其特征在于，所述玻璃非球面透镜的单位温度对单位折射率的影响率dng/dt与最靠近像侧的透镜的单位温度对单位折射率的影响率dni/dt之间满足|dng/dt|/|dni/dt|<0.1。
  3. 根据权利要求1或2所述的成像透镜组，其特征在于，所述玻璃非球面透镜的色散系数Vg与最靠近像侧的透镜的色散系数Vi之间满足0.35<Vg/Vi<1.5。
  4. 根据权利要求1或2所述的成像透镜组，其特征在于，所述玻璃非球面透镜的折射率Ng满足1.5≤Ng≤2.0。
  5. 根据权利要求3所述的成像透镜组，其特征在于，所述成像透镜组的有效焦距f与所述成像透镜组的入瞳直径之间满足1.5<f/EPD<2.5。
  6. 根据权利要求5所述的成像透镜组，其特征在于，所述成像透镜组的有效焦距f与所述玻璃非球面透镜的有效焦距fg之间满足-0.6<f/fg<1.2。
  7. 根据权利要求1所述的成像透镜组，其特征在于，所述成像透镜组的有效焦距f与所述第一透镜物侧面的曲率半径R1之间满足2<f/R1<4。
  8. 根据权利要求7所述的成像透镜组，其特征在于，所述第一透镜物侧面的曲率半径R1与所述第二透镜像侧面的曲率半径R4之间满足0<R1/R4<1.0。
  9. 一种成像透镜组，所述成像透镜组从所述成像透镜组的物侧至像侧依序包括：
    第一透镜；
    第二透镜；以及
    至少一个后续透镜，
    其特征在于，
    所述第一透镜、所述第二透镜和所述至少一个后续透镜中的至少一个透镜为玻璃非球面透镜，并且所述玻璃非球面透镜的单位温度对单位折射率的影响率dng/dt与最靠近像侧的透镜的单位温度对单位折射率的影响率dni/dt之间满足|dng/dt|/|dni/dt|<0.1。
  10. 根据权利要求9所述的成像透镜组，其特征在于，所述第一透镜具有正光焦度且其物侧面为凸面，并且所述第二透镜具有负光焦度且其像侧面为凹面。
  11. 根据权利要求9所述的成像透镜组，其特征在于，
    所述成像透镜组对应650nm波段的透过率T1>85％，
    所述成像透镜组对应490nm波段的透过率T2>88％，
    所述成像透镜组对应430nm波段的透过率T3>75％。
  12. 根据权利要求9至11中任一项所述的成像透镜组，其特征在于，所述玻璃非球面透镜的色散系数Vg与最靠近像侧的透镜的色散系数Vi之间满足0.35<Vg/Vi<1.5。
  13. 根据权利要求9至11中任一项所述的成像透镜组，其特征在于，所述玻璃非球面透镜的折射率Ng满足1.5≤Ng≤2.0。
  14. 根据权利要求9至11中任一项所述的成像透镜组，其特征在于，所述成像透镜组的有效焦距f与所述成像透镜组的入瞳直径之间满足1.5<f/EPD<2.5。
  15. 根据权利要求14所述的成像透镜组，其特征在于，所述成像透镜组的有效焦距f与所述玻璃非球面透镜的有效焦距fg之间满足-0.6<f/fg<1.2。
  16. 根据权利要求10所述的成像透镜组，其特征在于，所述成像透镜组的有效焦距f与所述第一透镜物侧面的曲率半径R1之间满足2<f/R1<4。
  17. 根据权利要求16所述的成像透镜组，其特征在于，所述第一透镜物侧面的曲率半径R1与所述第二透镜像侧面的曲率半径R4之间满足0<R1/R4<1.0。
  18. 一种成像透镜组，所述成像透镜组从所述成像透镜组的物侧至像侧依序包括：
    第一透镜，所述第一透镜具有正光焦度且其物侧面为凸面；
    第二透镜，所述第二透镜具有负光焦度且其像侧面为凹面；以及
    至少一个后续透镜，
    其特征在于，
    所述第一透镜、所述第二透镜和所述至少一个后续透镜中的至少一个透镜为玻璃非球面透镜，
    所述成像透镜组的有效焦距f与所述第一透镜物侧面的曲率半径R1之间满足2<f/R1<4。
  19. 根据权利要求18所述的成像透镜组，其特征在于，所述玻璃非球面透镜的色散系数Vg与最靠近像侧的透镜的色散系数Vi之间满足0.35<Vg/Vi<1.5。
  20. 根据权利要求19所述的成像透镜组，其特征在于，
    所述成像透镜组对应650nm波段的透过率T1>85％，
    所述成像透镜组对应490nm波段的透过率T2>88％，
    所述成像透镜组对应430nm波段的透过率T3>75％。
  21. 根据权利要求19所述的成像透镜组，其特征在于，所述玻璃非球面透镜的单位温度对单位折射率的影响率dng/dt与最靠近像侧的透镜的单位温度对单位折射率的影响率dni/dt之间满足|dng/dt|/|dni/dt|<0.1。
  22. 根据权利要求18至21中任一项所述的成像透镜组，其特征在于，所述玻璃非球面透镜的折射率Ng满足1.5≤Ng≤2.0。
  23. 根据权利要求18至21中任一项所述的成像透镜组，其特征在于，所述成像透镜组的有效焦距f与所述成像透镜组的入瞳直径之间满足1.5<f/EPD<2.5。
  24. 根据权利要求18至21中任一项所述的成像透镜组，其特征在于，所述成像透镜组的有效焦距f与所述玻璃非球面透镜的有效焦距fg之间满足-0.6<f/fg<1.2。
  25. 根据权利要求24所述的成像透镜组，其特征在于，所述第一透镜物侧面的曲率半径R1与所述第二透镜像侧面的曲率半径R4之间满足0<R1/R4<1.0。
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