WO2018192144A1 - 摄像镜头 - Google Patents

摄像镜头 Download PDF

Info

Publication number
WO2018192144A1
WO2018192144A1 PCT/CN2017/096591 CN2017096591W WO2018192144A1 WO 2018192144 A1 WO2018192144 A1 WO 2018192144A1 CN 2017096591 W CN2017096591 W CN 2017096591W WO 2018192144 A1 WO2018192144 A1 WO 2018192144A1
Authority
WO
WIPO (PCT)
Prior art keywords
lens
image pickup
object side
image
radius
Prior art date
Application number
PCT/CN2017/096591
Other languages
English (en)
French (fr)
Inventor
黄林
Original Assignee
浙江舜宇光学有限公司
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 CN201720406880.1U external-priority patent/CN206671658U/zh
Priority claimed from CN201710255925.4A external-priority patent/CN106842514B/zh
Application filed by 浙江舜宇光学有限公司 filed Critical 浙江舜宇光学有限公司
Priority to US15/772,744 priority Critical patent/US11579410B2/en
Publication of WO2018192144A1 publication Critical patent/WO2018192144A1/zh

Links

Images

Classifications

    • 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
    • G02B13/0035—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 three 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
    • G02B13/0015—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
    • G02B13/004—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 four 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
    • G02B13/008—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras designed for infrared light
    • 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 -
    • G02B9/12—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having three components only
    • 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 -
    • G02B9/34—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having four components only
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/14—Optical objectives specially designed for the purposes specified below for use with infrared or ultraviolet radiation

Definitions

  • the present invention relates to an imaging lens, and more particularly to an iris imaging lens comprising two sets of lens groups.
  • iris recognition technology as a kind of biometric technology, has received more and more attention from the market.
  • User identity verification is a more important part of information security.
  • Accuracy and adaptability to the environment are extremely important, so the requirements for iris recognition technology are correspondingly improved.
  • the application of iris recognition technology is also becoming wider and wider.
  • the camera lens used in this technology also needs to meet higher and higher performance requirements, especially in different environments.
  • the present invention aims to provide an iris imaging lens with high imaging quality, low temperature sensitivity, and miniaturization.
  • the present invention provides an imaging lens.
  • An aspect of the present invention provides an image pickup lens including a first lens group and a second lens group in order from an object side to an image side, wherein the first lens group includes a first lens and a second lens;
  • the two lens group includes at least one third lens;
  • a filter is disposed between the second lens group and the image side, and a radius of curvature R1 of the first lens object side surface and a curvature radius R2 of the first lens image side surface satisfy 0.5 ⁇ R1/R2 ⁇ 1.
  • an image pickup lens including a first lens group and a second lens group in order from an object side to an image side, wherein the first lens group includes a first lens and a second lens
  • the second lens group includes at least one third lens; a filter is disposed between the second lens group and the image side, and the effective radius DT11 of the first lens object side and the effective radius DT21 of the second lens object side are satisfied. 1 ⁇ DT11/DT21 ⁇ 1.5.
  • an image pickup lens including a first lens group and a second lens group in order from an object side to an image side, wherein the first lens group includes a first lens and a second lens a second lens group including at least one third lens; a filter disposed between the second lens group and the image side, a central thickness sum ⁇ CT of the first lens to the last lens on the optical axis, and the first lens
  • the on-axis distance TTL from the side of the lens to the imaging surface satisfies 0.3 ⁇ CT/TTL ⁇ 0.5.
  • the first lens has a positive power
  • the object side is a convex surface
  • the image side is a concave surface
  • the second lens has a positive power or a negative power
  • at least one of the first lens and the second lens One is a glass lens
  • the third lens has a negative power and a concave side of the object side.
  • the first lens group has a positive power and the second lens group has a negative power.
  • F1 is the effective focal length of the first lens group
  • F2 is the effective focal length of the second lens group.
  • a diaphragm is disposed between the second lens and the object to be tested.
  • DT12 is the effective radius of the side of the first lens image
  • DT21 is the effective radius of the side of the second lens object.
  • CT2 is the center thickness of the second lens on the optical axis
  • CT1 is the center thickness of the first lens on the optical axis
  • the filter is an IR infrared filter.
  • the image pickup lens according to the present invention includes two sets of lens groups and filters, and has characteristics of low temperature sensitivity, high image quality, and miniaturization.
  • FIG. 1 is a schematic structural view of an image pickup lens of Embodiment 1;
  • FIG. 2 to FIG. 6 respectively show an axial chromatic aberration curve, an astigmatism curve, a distortion curve, a magnification chromatic aberration curve, and a phase contrast curve of the imaging lens of Embodiment 1;
  • FIG. 7 is a schematic structural view of an image pickup lens of Embodiment 2.
  • FIG. 13 is a schematic structural view of an image pickup lens of Embodiment 3.
  • FIG. 14 to FIG. 18 respectively show an axial chromatic aberration curve, an astigmatism curve, a distortion curve, a magnification chromatic aberration curve, and a phase contrast curve of the imaging lens of Embodiment 3.
  • FIG. 19 is a schematic structural view of an image pickup lens of Embodiment 4.
  • FIG. 20 to FIG. 24 respectively show an axial chromatic aberration curve, an astigmatism curve, a distortion curve, a magnification chromatic aberration curve, and a phase contrast curve of the imaging lens of Embodiment 4.
  • 26 to 30 respectively show an axial chromatic aberration curve, an astigmatism curve, a distortion curve, a magnification chromatic aberration curve, and a phase contrast curve of the imaging lens of Embodiment 5.
  • a first element, component, region, layer or layer s s ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇
  • the application provides an imaging lens.
  • the imaging lens according to the present application includes, in order from the object side to the image side of the imaging lens, a first lens group, a second lens group, and a filter, the first lens group including a first lens and a second lens, the second The lens group includes at least one third lens.
  • the first lens group has positive power and the second lens group has negative power.
  • the imaging lens according to the embodiment of the present application can achieve low temperature sensitivity and improve the recognition accuracy of the iris.
  • the first lens has a positive power
  • the object side is a convex surface, like The side surface is a concave surface
  • the second lens has a positive power or a negative power
  • at least one of the first lens and the second lens is a glass lens
  • the third lens has a negative power and the object side is a concave surface.
  • the image pickup lens according to the embodiment of the present application has low temperature sensitivity, high image quality, and miniaturization.
  • 0.5 ⁇ R1/R2 ⁇ 1 is satisfied between the radius of curvature R1 of the side surface of the first lens object and the radius of curvature R2 of the side surface of the first lens image. More specifically, 0.518 ⁇ R1/R2 ⁇ 0.694 is satisfied.
  • the camera lens that satisfies the above relationship can achieve the effect of improving the resolution.
  • the effective focal length F1 of the first lens group and the effective focal length F2 of the second lens group satisfy -1.2 ⁇ F1/F2 ⁇ -0.6. More specifically, -1.015 ⁇ F1/F2 ⁇ -0.803 is satisfied.
  • the imaging lens that satisfies the above relationship can achieve low temperature sensitivity and improve iris recognition accuracy.
  • the diaphragm is disposed between the object to be tested and the second lens.
  • the image pickup lens according to this embodiment can achieve an effect of improving the resolution and reducing the tolerance sensitivity.
  • 1 ⁇ DT12/DT21 ⁇ 1.3 is satisfied between the effective radius DT12 of the first lens image side and the effective radius DT21 of the second lens object side. More specifically, 1.017 ⁇ DT12 / DT21 ⁇ 1.106 is satisfied.
  • the imaging lens that satisfies the above relationship can achieve the effect of reducing the size and enhancing the resolution.
  • the center thickness CT2 of the second lens on the optical axis satisfies 0.3 ⁇ CT2/CT1 ⁇ 0.8 between the center thickness CT1 of the first lens on the optical axis. More specifically, 0.369 ⁇ CT2 / CT1 ⁇ 0.614 is satisfied.
  • the camera lens that satisfies the above relationship can achieve low temperature sensitivity and enhance resolution.
  • the filter is an IR infrared filter.
  • the imaging lens according to this embodiment can realize the band pass of the IR band and cut off other bands to meet the application requirements of the iris.
  • 1 ⁇ DT11/DT21 ⁇ 1.5 is satisfied between the effective radius DT11 of the side surface of the first lens object and the effective radius DT21 of the side surface of the second lens object. More specifically, 1.331 ⁇ DT11 / DT21 ⁇ 1.427 is satisfied.
  • An imaging lens that satisfies the above relationship can achieve a reduction in size.
  • the sum of the center thickness sum ⁇ CT of the first lens to the last lens on the optical axis and the on-axis distance TTL of the first lens object side to the imaging surface satisfy 0.3 ⁇ CT/TTL ⁇ 0.5. . More specifically, 0.305 ⁇ ⁇ CT / TTL ⁇ 0.413 is satisfied.
  • the camera lens that satisfies the above relationship can properly match the lens size and enhance the resolution.
  • FIG. 1 is a schematic structural view showing an image pickup lens of Embodiment 1.
  • the imaging lens includes four lenses.
  • the four lenses are a first lens L1 having an object side surface S1 and an image side surface S2, a second lens L2 having an object side surface S3 and an image side surface S4, and a third lens L3 having an object side surface S5 and an image side surface S6, respectively.
  • the first lens L1 to the fourth lens L4 are disposed in order from the object side to the image side of the imaging lens.
  • the first lens L1 and the second lens L2 are the first lens group, and the third lens L3 and the fourth lens L4 are the second lens group.
  • the first lens L1 may have positive refractive power, and its object side surface S1 may be convex and the image side surface S2 may be concave.
  • the second lens L2 may have a positive power, and its object side S3 may be convex and the image side S4 may be concave.
  • the third lens L3 may have a negative power.
  • the fourth lens L4 may have a negative power.
  • the image pickup lens further includes a filter L5 having an object side surface S9 and an image side surface S10 for filtering out infrared light. In this embodiment, light from the object sequentially passes through the respective surfaces S1 to S10 and is finally imaged on the imaging surface S11.
  • the first lens L1 to the fourth lens L4 have respective effective focal lengths f1 to f4.
  • the first lens L1 to the fourth lens L4 are sequentially arranged along the optical axis and collectively determine the total effective focal length f of the imaging lens.
  • Table 1 below shows the surface type, radius of curvature, thickness, refractive index, dispersion coefficient, and conic coefficient of each lens in the image pickup lens in this embodiment.
  • the unit of curvature radius and thickness are all millimeters (mm).
  • each aspherical surface type x is defined by the following formula (1):
  • 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 1);
  • Ai is the correction coefficient of the a-th order of the aspherical surface.
  • Table 2 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 S3-S8 which can be used for the respective aspherical lenses in this embodiment.
  • FIG. 2 shows an axial chromatic aberration curve of the image pickup lens of Embodiment 1, which indicates that light beams of different wavelengths are deviated from a focus point after passing through the optical system.
  • Fig. 3 is a view showing an astigmatism curve of the image pickup lens of Embodiment 1, which shows a meridional field curvature and a sagittal image plane curvature.
  • Fig. 4 is a view showing a distortion curve of the image pickup lens of Embodiment 1, which shows distortion magnitude values in the case of different viewing angles.
  • FIG. 5 shows a magnification chromatic aberration curve of the imaging lens of Embodiment 1, which shows a deviation of different image heights on the imaging plane after the light passes through the imaging lens.
  • Fig. 3 is a view showing an astigmatism curve of the image pickup lens of Embodiment 1, which shows a meridional field curvature and a sagittal image plane curvature.
  • Fig. 4 is a view showing
  • the imaging lens according to Embodiment 1 is an imaging lens having high imaging quality, low temperature sensitivity, and miniaturization.
  • FIG. 7 is a schematic structural view showing an image pickup lens of Embodiment 2.
  • the imaging lens includes three lenses.
  • the three lenses are a first lens L1 having an object side surface S1 and an image side surface S2, a second lens L2 having an object side surface S3 and an image side surface S4, and a third lens L3 having an object side surface S5 and an image side surface S6.
  • the first lens L1 to the third lens L3 are disposed in order from the object side to the image side of the imaging lens.
  • the first lens L1 and the second lens L2 are the first lens group, and the third lens L3 is the second lens group.
  • the first lens L1 may have positive refractive power, and its object side surface S1 may be convex and the image side surface S2 may be concave.
  • the second lens L2 may have a positive power, and its object side S3 may be convex and the image side S4 may be concave.
  • the third lens L3 may have a negative power.
  • the image pickup lens further includes a filter L4 having an object side surface S7 and an image side surface S8 for filtering out infrared light. In this embodiment, light from the object sequentially passes through the respective surfaces S1 to S8 and is finally imaged on the imaging surface S9.
  • the first lens L1 to the third lens L3 have respective effective focal lengths f1 to f3.
  • the first lens L1 to the third lens L3 are sequentially arranged along the optical axis and collectively determine the total effective focal length f of the imaging lens.
  • Table 3 below shows the surface type, radius of curvature, thickness, refractive index, dispersion coefficient, and conic coefficient of each lens in the image pickup lens in this embodiment.
  • Table 4 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 - S6 of the respective aspherical lenses usable in this embodiment.
  • each aspherical surface type can be defined by the formula (1) given in the above embodiment 1.
  • Fig. 8 is a view showing an axial chromatic aberration curve of the image pickup lens of Embodiment 2, which shows that light rays of different wavelengths are deviated from a focus point after passing through the optical system.
  • Fig. 9 is a view showing an astigmatism curve of the image pickup lens of Embodiment 2, which shows meridional field curvature and sagittal image plane curvature.
  • Fig. 10 is a view showing a distortion curve of the image pickup lens of Embodiment 2, which shows distortion magnitude values in the case of different viewing angles.
  • the imaging lens according to Embodiment 2 is an imaging lens having high imaging quality, low temperature sensitivity, and miniaturization.
  • FIG. 13 is a schematic structural view showing an image pickup lens of Embodiment 3.
  • the imaging lens described in Embodiment 3 has the same arrangement as that of the imaging lens described in Embodiment 1. In the present embodiment, a description similar to Embodiment 1 will be omitted for the sake of brevity.
  • the imaging lens in the third embodiment includes, in order from the object side to the image side, a first lens L1, a second lens L2, a third lens L3, and a fourth lens L4.
  • the first lens L1 to the fourth lens L4 have respective effective focal lengths f1 to f4.
  • the first lens L1 to the fourth lens L4 are sequentially arranged along the optical axis and collectively determine the total effective focal length f of the imaging lens.
  • Table 5 shows the surface type, radius of curvature, thickness, refractive index, dispersion coefficient, and conic coefficient of each lens in the image pickup lens in this embodiment.
  • Table 6 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 - S8 of the respective aspherical lenses usable in this embodiment.
  • each aspherical surface type can be defined by the formula (1) given in the above embodiment 1.
  • Fig. 14 is a view showing an axial chromatic aberration curve of the image pickup lens of Embodiment 3, which shows that light rays of different wavelengths are deviated from a focus point after passing through the optical system.
  • Fig. 15 is a view showing an astigmatism curve of the image pickup lens of Embodiment 3, which shows a meridional field curvature and a sagittal image plane curvature.
  • Fig. 16 is a view showing a distortion curve of the image pickup lens of Embodiment 3, which shows the distortion magnitude value in the case of different viewing angles.
  • Fig. 14 is a view showing an axial chromatic aberration curve of the image pickup lens of Embodiment 3, which shows that light rays of different wavelengths are deviated from a focus point after passing through the optical system.
  • Fig. 15 is a view showing an astigmatism curve of the image pickup lens of Embodiment 3, which shows a meridional field curvature and a sagittal image plane
  • the imaging lens according to Embodiment 3 is an imaging lens having high imaging quality, low temperature sensitivity, and miniaturization.
  • Embodiment 19 is a schematic structural view showing an image pickup lens of Embodiment 4.
  • the imaging lens described in Embodiment 4 has the same arrangement as that of the imaging lens described in Embodiment 2. In the present embodiment, a description similar to Embodiment 2 will be omitted for the sake of brevity.
  • the imaging lens in Embodiment 4 includes, in order from the object side to the image side, a first lens L1, a second lens L2, and a third lens L3.
  • the first lens L1 to the third lens L3 have respective effective focal lengths f1 to f3.
  • the first lens L1 to the third lens L3 are sequentially arranged along the optical axis and collectively determine the total effective focal length f of the imaging lens.
  • Table 7 below shows the surface type, radius of curvature, thickness, refractive index, dispersion coefficient, and conic coefficient of each lens in the image pickup lens in this embodiment.
  • Table 8 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 - S6 which can be used for the respective aspherical lenses in this embodiment.
  • each aspherical surface type can be defined by the formula (1) given in the above embodiment 1.
  • Fig. 20 is a view showing an axial chromatic aberration curve of the image pickup lens 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. 21 is a view showing an astigmatism curve of the image pickup lens of Embodiment 4, which shows a meridional field curvature and a sagittal image plane curvature.
  • Fig. 22 is a view showing the distortion curve of the image pickup lens of Embodiment 4, which shows the distortion magnitude value in the case of different viewing angles.
  • Fig. 20 is a view showing an axial chromatic aberration curve of the image pickup lens 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. 21 is a view showing an astigmatism curve of the image pickup lens of Embodiment 4, which shows a meridional field curvature and a sagittal image plane curvature
  • the imaging lens according to Embodiment 4 is an imaging lens having high imaging quality, low temperature sensitivity, and miniaturization.
  • Fig. 25 is a block diagram showing the structure of the image pickup lens of the fifth embodiment.
  • the imaging lens described in Embodiment 5 has the same arrangement as that of the imaging lens described in Embodiment 2. In the present embodiment, a description similar to Embodiment 2 will be omitted for the sake of brevity.
  • the imaging lens in Embodiment 5 includes, in order from the object side to the image side, a first lens L1, a second lens L2, and a third lens L3.
  • the first lens L1 to the third lens L3 have respective effective focal lengths f1 to f3.
  • the first lens L1 to the third lens L3 are sequentially arranged along the optical axis and collectively determine the total effective focal length f of the imaging lens.
  • the effective focal length f1 of the first lens L1 is 4.468;
  • Table 9 below shows the surface type, radius of curvature, and radius of each lens in the image pickup lens in this embodiment. Thickness, refractive index, dispersion coefficient, and conic coefficient.
  • Table 10 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 - S6 of the respective aspherical lenses usable in this embodiment.
  • each aspherical surface type can be defined by the formula (1) given in the above embodiment 1.
  • Fig. 26 is a view showing an axial chromatic aberration curve of the image pickup lens 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. 27 is a view showing an astigmatism curve of the image pickup lens of Embodiment 5, which shows a meridional field curvature and a sagittal image plane curvature.
  • Fig. 28 is a view showing a distortion curve of the image pickup lens of Embodiment 5, which shows the distortion magnitude value in the case of different viewing angles.
  • 29 is a magnification chromatic aberration curve of the image pickup lens of Example 5, which shows deviations of different image heights on the image plane after the light rays pass through the image pickup lens.
  • Fig. 30 is a view showing a phase contrast curve of the image pickup lens of the fifth embodiment, which shows the brightness ratio of the peripheral screen light to the center screen, reflecting the brightness uniformity of the screen.
  • the imaging lens according to Embodiment 5 is an imaging lens having high imaging quality, low temperature sensitivity, and miniaturization.
  • F1/F2 is the ratio of the effective focal length of the first lens group to the effective focal length of the second lens group
  • R1/R2 is the ratio of the radius of curvature of the side surface of the first lens to the radius of curvature of the side of the first lens image
  • DT11/ DT21 is the ratio of the effective radius of the side of the first lens to the effective radius of the side of the second lens
  • DT12/DT21 is the ratio of the effective radius of the side of the first lens image to the effective radius of the side of the second lens
  • ⁇ CT/TTL The ratio of the sum of the center thickness of the first lens to the last lens having the power on the optical axis to the axial distance from the center of the first lens side to the imaging surface
  • CT2/CT1 is the second lens on the optical axis The ratio of the center thickness to the center thickness of the first lens on the optical axis.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)

Abstract

一种摄像镜头。该摄像镜头由物侧至像侧依次包括第一透镜组和第二透镜组，其中，第一透镜组包括第一透镜（L1）和第二透镜（L2）；第二透镜组包括至少一个第三透镜（L3）；在第二透镜组和像侧之间设置有滤光片（L5）；第一透镜的物侧面（S1）的曲率半径R1与第一透镜的像侧面（S2）的曲率半径R2之间满足0.5＜R1/R2＜1。摄像镜头包含两组透镜组以及滤光片（L5），具有低温度敏感性、高成像品质以及小型化的特点。

Description

摄像镜头
相关申请的交叉引用
本申请要求于2017年4月18日提交至中国国家知识产权局(SIPO)的、专利申请号为201710255925.4的中国专利申请以及于2017年4月18日提交至SIPO的、专利申请号为201720406880.1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
本发明涉及一种摄像镜头，特别是包含两组透镜组的虹膜摄像镜头。
背景技术
近年来，随着科技的突飞猛进，虹膜识别技术作为生物识别技术的一种，越来越受到市场的重视。用户身份确认是信息安全中较为重要的一部分，准确性与对环境的适应能力都极为重要，因而对虹膜识别技术的要求也相应提高。虹膜识别技术应用范围也越来越广，应用在该技术上的摄像镜头也需满足越来越高的性能要求，特别是在不同环境下的适应能力也应大大增强。
因此本发明旨在提供一种高成像品质、低温度敏感性、小型化的虹膜摄像镜头。
发明内容
为了解决现有技术中的至少一些问题，本发明提供了一种摄像镜头。
本发明的一个方面提供了一种摄像镜头，所述摄像镜头由物侧至像侧依次包括第一透镜组和第二透镜组，其中，第一透镜组包括第一透镜和第二透镜；第二透镜组包括至少一个第三透镜；在第二透镜组和像侧之间设置有滤光片，第一透镜物侧面的曲率半径R1与第一透镜像侧面的曲率半径R2之间满足0.5＜R1/R2＜1。
本发明的另一个方面提供了这样一种摄像镜头，所述摄像镜头由物侧至像侧依次包括第一透镜组和第二透镜组，其中，第一透镜组包括第一透镜和第二透镜；第二透镜组包括至少一个第三透镜；在第二透镜组和像侧之间设置有滤光片，第一透镜物侧面的有效半径DT11与第二透镜物侧面的有效半径DT21之间满足1＜DT11/DT21＜1.5。
本发明的另一个方面提供了这样一种摄像镜头，所述摄像镜头由物侧至像侧依次包括第一透镜组和第二透镜组，其中，第一透镜组包括第一透镜和第二透镜；第二透镜组包括至少一个第三透镜；在第二透镜组和像侧之间设置有滤光片，第一透镜至最后一个透镜在光轴上的中心厚度总和∑CT与所述第一透镜物侧面至成像面的轴上距离TTL之间满足0.3＜∑CT/TTL＜0.5。
根据本发明的一个实施方式，第一透镜具有正光焦度，其物侧面为凸面，像侧面为凹面；第二透镜具有正光焦度或负光焦度；第一透镜和第二透镜中的至少一者为玻璃镜片；以及第三透镜具有负光焦度且其物侧面为凹面。
根据本发明的一个实施方式，第一透镜组具有正光焦度，第二透镜组具有负光焦度。
根据本发明的一个实施方式，-1.2＜F1/F2＜-0.6，F1为第一透镜组的有效焦距，F2为第二透镜组的有效焦距。
根据本发明的一个实施方式，在第二透镜与被测物之间设置有光阑。
根据本发明的一个实施方式，1＜DT12/DT21＜1.3，DT12为第一透镜像侧面的有效半径，DT21为第二透镜物侧面的有效半径。
根据本发明的一个实施方式，0.3＜CT2/CT1＜0.8，CT2为第二透镜在光轴上的中心厚度，CT1为第一透镜在光轴上的中心厚度。
根据本发明的一个实施方式，滤光片为IR红外滤光片。
根据本发明的摄像镜头包含两组透镜组以及滤光片，具有低温度敏感性、高成像品质以及小型化的特点。
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的摄像镜头的结构示意图；
图2至图6分别示出了实施例1的摄像镜头的轴上色差曲线、象散曲线、畸变曲线、倍率色差曲线和相对照度曲线；
图7示出了实施例2的摄像镜头的结构示意图；
图8至图12分别示出了实施例2的摄像镜头的轴上色差曲线、象散曲线、畸变曲线、倍率色差曲线和相对照度曲线；
图13示出了实施例3的摄像镜头的结构示意图；
图14至图18分别示出了实施例3的摄像镜头的轴上色差曲线、象散曲线、畸变曲线、倍率色差曲线和相对照度曲线；
图19示出了实施例4的摄像镜头的结构示意图；
图20至图24分别示出了实施例4的摄像镜头的轴上色差曲线、象散曲线、畸变曲线、倍率色差曲线和相对照度曲线；
图25示出了实施例5的摄像镜头的结构示意图；以及
图26至图30分别示出了实施例5的摄像镜头的轴上色差曲线、象散曲线、畸变曲线、倍率色差曲线和相对照度曲线。
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。
本申请提供了一种摄像镜头。根据本申请的摄像镜头从摄像镜头的物侧至像侧依序包括：第一透镜组、第二透镜组以及滤光片，该第一透镜组包括第一透镜和第二透镜，该第二透镜组包括至少一个第三透镜。
在本申请的实施例中，第一透镜组具有正光焦度，第二透镜组具有负光焦度。根据本申请实施例的摄像镜头能够实现低温度敏感性，提高虹膜的识别精度。
在本申请的实施例中，第一透镜具有正光焦度，其物侧面为凸面，像 侧面为凹面，第二透镜具有正光焦度或负光焦度；第一透镜和第二透镜中的至少一个为玻璃镜片；第三透镜具有负光焦度且其物侧面为凹面。根据本申请实施例的摄像镜头具有低温度敏感性、高成像品质且小型化。
在本申请的实施例中，第一透镜物侧面的曲率半径R1与第一透镜像侧面的曲率半径R2之间满足0.5＜R1/R2＜1。更具体地，满足0.518≤R1/R2≤0.694。满足上述关系的摄像镜头能够实现提升解像力的功效。
在本申请的实施例中，第一透镜组的有效焦距F1与第二透镜组的有效焦距F2之间满足-1.2＜F1/F2＜-0.6。更具体地，满足-1.015≤F1/F2≤-0.803。满足上述关系的摄像镜头能够实现低温度敏感性、提升虹膜识别精度的功效。
在本申请的实施例中，光阑设置在被测物与第二透镜之间。根据该实施例的摄像镜头能够实现提升解像力、降低公差感度的效果。
在本申请的实施例中，第一透镜像侧面的有效半径DT12与第二透镜物侧面的有效半径DT21之间满足1＜DT12/DT21＜1.3。更具体地，满足1.017≤DT12/DT21≤1.106。满足上述关系的摄像镜头能够实现减小尺寸、提升解像力的功效。
在本申请的实施例中，第二透镜在光轴上的中心厚度CT2与第一透镜在光轴上的中心厚度CT1之间满足0.3＜CT2/CT1＜0.8。更具体地，满足0.369≤CT2/CT1≤0.614。满足上述关系的摄像镜头能够实现低温度敏感性、提升解像力的功效。
在本申请的实施例中，滤光片为IR红外滤光片。根据该实施例的摄像镜头能够实现IR波段的带通，截止其它波段，满足虹膜的应用要求。
在本申请的实施例中，第一透镜物侧面的有效半径DT11与第二透镜物侧面的有效半径DT21之间满足1＜DT11/DT21＜1.5。更具体地，满足1.331≤DT11/DT21≤1.427。满足上述关系的摄像镜头能够实现减小尺寸的功效。
在本申请的实施例中，第一透镜至最后一个透镜在光轴上的中心厚度总和∑CT与第一透镜物侧面至成像面的轴上距离TTL之间满足0.3＜∑CT/TTL＜0.5。更具体地，满足0.305≤∑CT/TTL≤0.413。满足上述关系的摄像镜头能够合理配布镜片尺寸，提升解像力的功效。
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6描述根据本申请实施例1的摄像镜头。
图1为示出了实施例1的摄像镜头的结构示意图。如图1所示，摄像镜头包括4片透镜。这4片透镜分别为具有物侧面S1和像侧面S2的第一透镜L1、具有物侧面S3和像侧面S4的第二透镜L2、具有物侧面S5和像侧面S6的第三透镜L3以及具有物侧面S7和像侧面S8的第四透镜L4。第一透镜L1至第四透镜L4从摄像镜头的物侧到像侧依次设置。其中，第一透镜L1与第二透镜L2为第一透镜组，第三透镜L3与第四透镜L4为第二透镜组。第一透镜L1可具有正光焦度，且其物侧面S1可为凸面并且像侧面S2为凹面。第二透镜L2可具有正光焦度，且其物侧面S3可为凸面并且像侧面S4可为凹面。第三透镜L3可具有负光焦度。第四透镜L4可具有负光焦度。该摄像镜头还包括用于滤除红外光的具有物侧面S9和像侧面S10的滤光片L5。在该实施例中，来自物体的光依次穿过各表面S1至S10并最终成像在成像表面S11上。
在该实施例中，第一透镜L1至第四透镜L4分别具有各自的有效焦距f1至f4。第一透镜L1至第四透镜L4沿着光轴依次排列并共同决定了摄像镜头的总有效焦距f。在该实施例中，第一透镜L1的有效焦距f1＝5.698；第二透镜L2的有效焦距f2＝7.055；第三透镜L3的有效焦距f3＝-9.583；第四透镜L4的有效焦距f4＝-7.245；摄像镜头的总有效焦距f＝4.232。摄像镜头的总长度TTL＝4.048。摄像镜头的光圈数Fno＝2.48。
下表1示出了该实施例中的摄像镜头中各透镜的表面类型、曲率半径、厚度、折射率、色散系数和圆锥系数。其中，曲率半径和厚度的单位均为毫米(mm)。
Figure PCTCN2017096591-appb-000001
Figure PCTCN2017096591-appb-000002
表1
在本实施例中，各非球面面型x由以下公式(1)限定：
Figure PCTCN2017096591-appb-000003
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1中已给出)；Ai是非球面第i-th阶的修正系数。下表2示出了可用于该实施例中的各非球面透镜的各非球面S3-S8的高次项系数A4、A6、A8、A10、A12、A14和A16。
面号 A4 A6 A8 A10 A12 A14 A16
S3 -1.9839E-02 -8.4294E-02 3.6992E-01 -1.2250E+00 1.8102E+00 -1.0843E+00 0.0000E+00
S4 -6.3613E-05 8.2600E-02 -6.3330E-01 1.6688E+00 -2.4604E+00 1.3448E+00 0.0000E+00
S5 -4.0661E-01 -2.8148E-01 2.9911E+00 -1.3234E+01 2.8547E+01 -2.8479E+01 8.8405E+00
S6 -3.6911E-01 5.7703E-01 -1.2182E+00 2.5685E+00 -3.4113E+00 3.1258E+00 -1.3840E+00
S7 -4.8730E-01 4.9842E-01 -4.6301E-01 2.7327E-01 -4.6194E-02 -1.7735E-02 5.6537E-03
S8 -1.9899E-01 -8.2427E-02 3.3586E-01 -4.2287E-01 2.7540E-01 -9.3482E-02 1.3054E-02
表2
图2示出了实施例1的摄像镜头的轴上色差曲线，其表示不同波长的光线经由光学***后的会聚焦点偏离。图3示出了实施例1的摄像镜头的象散曲线，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的摄像镜头的畸变曲线，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的摄像镜头的倍率色差曲线，其表示光线经由摄像镜头后在成像面上的不同的像高的偏差。图6示出了实施例1的摄像镜头的相对照度曲线，其表示周边画面光亮与中心画面光亮比，反映了画面光亮均匀性。综上所述并参照图2至图6可以看出，根据实施例1的摄像镜头是一种高成像品质、低温度敏感性、小型化的摄像镜头。
实施例2
以下参照图7至图12描述根据本申请实施例2的摄像镜头。
图7为示出了实施例2的摄像镜头的结构示意图。如图7所示，摄像镜头包括3片透镜。这3片透镜分别为具有物侧面S1和像侧面S2的第一透镜L1、具有物侧面S3和像侧面S4的第二透镜L2以及具有物侧面S5和像侧面S6的第三透镜L3。第一透镜L1至第三透镜L3从摄像镜头的物侧到像侧依次设置。其中，第一透镜L1与第二透镜L2为第一透镜组，第三透镜L3为第二透镜组。第一透镜L1可具有正光焦度，且其物侧面S1可为凸面并且像侧面S2为凹面。第二透镜L2可具有正光焦度，且其物侧面S3可为凸面并且像侧面S4可为凹面。第三透镜L3可具有负光焦度。该摄像镜头还包括用于滤除红外光的具有物侧面S7和像侧面S8的滤光片L4。在该实施例中，来自物体的光依次穿过各表面S1至S8并最终成像在成像表面S9上。
在该实施例中，第一透镜L1至第三透镜L3分别具有各自的有效焦距f1至f3。第一透镜L1至第三透镜L3沿着光轴依次排列并共同决定了摄像镜头的总有效焦距f。在该实施例中，第一透镜L1的有效焦距f1＝3.458；第二透镜L2的有效焦距f2＝208.807；第三透镜L3的有效焦距f3＝-4.064；摄像镜头的总有效焦距f＝3.988。摄像镜头的总长度TTL＝3.589。摄像镜头的光圈数Fno＝2.56。
下表3示出了该实施例中的摄像镜头中各透镜的表面类型、曲率半径、厚度、折射率、色散系数和圆锥系数。
Figure PCTCN2017096591-appb-000004
表3
下表4示出了可用于该实施例中的各非球面透镜的各非球面S1-S6的高次项系数A4、A6、A8、A10、A12、A14和A16。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 -1.4997E-02 -1.9400E-02 1.4354E-01 -5.9301E-01 1.2546E+00 -1.3337E+00 5.5769E-01
S2 1.4080E-01 -1.2529E-01 2.1054E+00 -9.4535E+00 2.3099E+01 -2.6522E+01 1.0825E+01
S3 3.6686E-01 1.0451E-01 4.4684E-01 -3.1561E+00 1.2979E+01 -2.0675E+01 1.0034E+01
S4 3.5986E-01 7.8044E-01 -5.3606E+00 2.7148E+01 -5.5201E+01 4.6383E+01 -1.3849E+01
S5 -9.9174E-01 2.8964E+00 -1.1036E+01 2.9201E+01 -4.7668E+01 4.3402E+01 -1.6145E+01
S6 -7.4645E-01 1.9085E+00 -4.8299E+00 8.0632E+00 -8.0890E+00 4.3698E+00 -9.3204E-01
表4
图8示出了实施例2的摄像镜头的轴上色差曲线，其表示不同波长的光线经由光学***后的会聚焦点偏离。图9示出了实施例2的摄像镜头的象散曲线，其表示子午像面弯曲和弧矢像面弯曲。图10示出了实施例2的摄像镜头的畸变曲线，其表示不同视角情况下的畸变大小值。图11示出了实施例2的摄像镜头的倍率色差曲线，其表示光线经由摄像镜头后在成像面上的不同的像高的偏差。图12示出了实施例2的摄像镜头的相对照度曲线，其表示周边画面光亮与中心画面光亮比，反映了画面光亮均匀性。综上所述并参照图8至图12可以看出，根据实施例2的摄像镜头是一种高成像品质、低温度敏感性、小型化的摄像镜头。
实施例3
以下参照图13至图18描述根据本申请实施例3的摄像镜头。
图13为示出了实施例3的摄像镜头的结构示意图。除了摄像镜头的各透镜的参数之外，例如除了各透镜的曲率半径、厚度、折射率、色散系数、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3中描述的摄像镜头与实施例1中描述的摄像镜头的布置结构相同。在本实施例中，为简洁起见，将省略部分与实施例1相似的描述。
实施例3中的摄像镜头由物侧至像侧依次包括第一透镜L1、第二透镜L2、第三透镜L3以及第四透镜L4。
在该实施例中，第一透镜L1至第四透镜L4分别具有各自的有效焦距f1至f4。第一透镜L1至第四透镜L4沿着光轴依次排列并共同决定了摄像镜头的总有效焦距f。在该实施例中，第一透镜L1的有效焦距f1＝4.844；第二透镜L2的有效焦距f2＝9.149；第三透镜L3的有效焦距f3＝-12.278；第四透镜L4的有效焦距f4＝-5.628。摄像镜头的总有效焦距f＝4.231。摄像镜头的总长度TTL＝4.032。摄像镜头的光圈数Fno＝2.38。
表5示出了该实施例中的摄像镜头中各透镜的表面类型、曲率半径、厚度、折射率、色散系数和圆锥系数。
Figure PCTCN2017096591-appb-000005
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-S8的高次项系数A4、A6、A8、A10、A12、A14和A16。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 -1.9163E-02 -2.3965E-02 4.6180E-02 -8.1330E-02 6.4838E-02 -2.4498E-02 0.0000E+00
S2 -3.0374E-02 6.2390E-02 -5.0943E-02 8.9245E-02 -8.1187E-02 1.6325E-02 0.0000E+00
S3 -6.4342E-02 1.3823E-01 -2.7791E-01 1.2451E+00 -2.0584E+00 1.4526E+00 0.0000E+00
S4 -5.6640E-02 2.3728E-01 -8.6948E-01 4.0773E+00 -7.7811E+00 6.6038E+00 0.0000E+00
S5 -3.9570E-01 -6.7974E-02 -5.8443E-02 3.3667E+00 -1.9799E+01 4.3653E+01 -3.7083E+01
S6 -2.5800E-01 2.6521E-01 -2.4382E-01 3.7022E-01 1.8721E-01 -9.6338E-01 5.2569E-01
S7 -4.7462E-01 5.5739E-01 -5.3972E-01 5.2256E-01 -3.2394E-01 1.0439E-01 -1.3594E-02
S8 -3.0802E-01 2.2750E-01 -1.5466E-01 1.0199E-01 -5.0170E-02 1.5751E-02 -2.2693E-03
表6
图14示出了实施例3的摄像镜头的轴上色差曲线，其表示不同波长的光线经由光学***后的会聚焦点偏离。图15示出了实施例3的摄像镜头的象散曲线，其表示子午像面弯曲和弧矢像面弯曲。图16示出了实施例3的摄像镜头的畸变曲线，其表示不同视角情况下的畸变大小值。图17示出了实施例3的摄像镜头的倍率色差曲线，其表示光线经由摄像镜头后在成像面上的不同的像高的偏差。图18示出了实施例3的摄像镜头的相对照度曲线，其表示周边画面光亮与中心画面光亮比，反映了画面光亮均匀性。综上所述并参照图14至图18可以看出，根据实施例3的摄像镜头是一种高成像品质、低温度敏感性、小型化的摄像镜头。
实施例4
以下参照图19至图24描述根据本申请实施例4的摄像镜头。
图19为示出了实施例4的摄像镜头的结构示意图。除了摄像镜头的各透镜的参数之外，例如除了各透镜的曲率半径、厚度、折射率、色散系数、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4中描述的摄像镜头与实施例2中描述的摄像镜头的布置结构相同。在本实施例中，为简洁起见，将省略部分与实施例2相似的描述。
实施例4中的摄像镜头由物侧至像侧依次包括第一透镜L1、第二透镜L2和第三透镜L3。
在该实施例中，第一透镜L1至第三透镜L3分别具有各自的有效焦距f1至f3。第一透镜L1至第三透镜L3沿着光轴依次排列并共同决定了摄像镜头的总有效焦距f。在该实施例中，第一透镜L1的有效焦距f1＝4.439；第二透镜L2的有效焦距f2＝7.874；第三透镜L3的有效焦距f3＝-3.216；摄像镜头的总有效焦距f＝4.317。摄像镜头的总长度TTL＝4.000。摄像镜头的光圈数Fno＝2.55。
下表7示出了该实施例中的摄像镜头中各透镜的表面类型、曲率半径、厚度、折射率、色散系数和圆锥系数。
Figure PCTCN2017096591-appb-000006
表7
下表8示出了可用于该实施例中的各非球面透镜的各非球面S1-S6的高次项系数A4、A6、A8、A10、A12、A14和A16。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。
Figure PCTCN2017096591-appb-000007
Figure PCTCN2017096591-appb-000008
表8
图20示出了实施例4的摄像镜头的轴上色差曲线，其表示不同波长的光线经由光学***后的会聚焦点偏离。图21示出了实施例4的摄像镜头的象散曲线，其表示子午像面弯曲和弧矢像面弯曲。图22示出了实施例4的摄像镜头的畸变曲线，其表示不同视角情况下的畸变大小值。图23示出了实施例4的摄像镜头的倍率色差曲线，其表示光线经由摄像镜头后在成像面上的不同的像高的偏差。图24示出了实施例4的摄像镜头的相对照度曲线，其表示周边画面光亮与中心画面光亮比，反映了画面光亮均匀性。综上所述并参照图20至图24可以看出，根据实施例4的摄像镜头是一种高成像品质、低温度敏感性、小型化的摄像镜头。
实施例5
以下参照图25至图30描述根据本申请实施例5的摄像镜头。
图25为示出了实施例5的摄像镜头的结构示意图。除了摄像镜头的各透镜的参数之外，例如除了各透镜的曲率半径、厚度、折射率、色散系数、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5中描述的摄像镜头与实施例2中描述的摄像镜头的布置结构相同。在本实施例中，为简洁起见，将省略部分与实施例2相似的描述。
实施例5中的摄像镜头由物侧至像侧依次包括第一透镜L1、第二透镜L2和第三透镜L3。
在该实施例中，第一透镜L1至第三透镜L3分别具有各自的有效焦距f1至f3。第一透镜L1至第三透镜L3沿着光轴依次排列并共同决定了摄像镜头的总有效焦距f。在该实施例中，第一透镜L1的有效焦距f1＝4.468；第二透镜L2的有效焦距f2＝9.207；第三透镜L3的有效焦距f3＝-3.446；摄像镜头的总有效焦距f＝4.346。摄像镜头的总长度TTL＝4.000。摄像镜头的光圈数Fno＝2.56。
下表9示出了该实施例中的摄像镜头中各透镜的表面类型、曲率半径、 厚度、折射率、色散系数和圆锥系数。
Figure PCTCN2017096591-appb-000009
表9
下表10示出了可用于该实施例中的各非球面透镜的各非球面S1-S6的高次项系数A4、A6、A8、A10、A12、A14和A16。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 -1.5150E-02 1.8864E-02 -9.4871E-02 1.7678E-01 -1.8416E-01 7.0387E-02 -1.7232E-03
S2 4.3472E-02 2.7384E-02 3.2157E-03 1.8646E-02 -3.2132E-02 1.4283E-02 -2.0210E-03
S3 -8.5999E-03 -9.2050E-02 2.5050E-01 -1.0572E+00 1.4318E+00 -7.4848E-01 1.3518E-01
S4 1.0079E-02 -6.9494E-03 -1.3089E-01 1.5639E-01 -6.9518E-02 1.3565E-02 -9.7796E-04
S5 -6.1984E-01 1.1321E+00 -2.7911E+00 3.1137E+00 1.0271E+00 -6.6380E+00 4.9296E+00
S6 -5.5645E-01 1.1826E+00 -2.5080E+00 3.6295E+00 -3.2157E+00 1.5364E+00 -2.8984E-01
表10
图26示出了实施例5的摄像镜头的轴上色差曲线，其表示不同波长的光线经由光学***后的会聚焦点偏离。图27示出了实施例5的摄像镜头的象散曲线，其表示子午像面弯曲和弧矢像面弯曲。图28示出了实施例5的摄像镜头的畸变曲线，其表示不同视角情况下的畸变大小值。图29示出了实施例5的摄像镜头的倍率色差曲线，其表示光线经由摄像镜头后在成像面上的不同的像高的偏差。图30示出了实施例5的摄像镜头的相对照度曲线，其表示周边画面光亮与中心画面光亮比，反映了画面光亮均匀性。综上所述并参照图26至图30可以看出，根据实施例5的摄像镜头是一种高成像品质、低温度敏感性、小型化的摄像镜头。
在下表11中，列出了实施例1至5中各摄像镜头的光圈数Fno、总长度TTL、总有效焦距f，以及摄像镜头中各透镜的有效焦距值。
Figure PCTCN2017096591-appb-000010
Figure PCTCN2017096591-appb-000011
表11
在下表12中，列出了实施例1至5的各摄像镜头中的参数值之间的关系。
Figure PCTCN2017096591-appb-000012
表12
其中，F1/F2为第一透镜组的有效焦距与第二透镜组的有效焦距之比；R1/R2为第一透镜物侧面的曲率半径与第一透镜像侧面的曲率半径之比；DT11/DT21为第一透镜物侧面的有效半径与第二透镜物侧面的有效半径之比；DT12/DT21为第一透镜像侧面的有效半径与第二透镜物侧面的有效半径之比；∑CT/TTL为第一透镜至最后一具有光焦度透镜在光轴上的中心厚度总和与第一透镜物侧面的中心至成像面的轴上距离之比；CT2/CT1为第二透镜在光轴上的中心厚度与第一透镜在光轴上的中心厚度之比。
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 (30)

  1. 一种摄像镜头，由物侧至像侧依次包括第一透镜组和第二透镜组，其特征在于，
    所述第一透镜组包括第一透镜和第二透镜；
    所述第二透镜组包括至少一个第三透镜；
    在所述第二透镜组和所述像侧之间设置有滤光片；以及
    所述第一透镜的物侧面的曲率半径R1与所述第一透镜的像侧面的曲率半径R2之间满足0.5＜R1/R2＜1。
  2. 根据权利要求1所述的摄像镜头，其特征在于，
    所述第一透镜具有正光焦度，其物侧面为凸面，像侧面为凹面，
    所述第二透镜具有正光焦度或负光焦度，
    所述第一透镜和所述第二透镜中的至少一者为玻璃镜片，以及
    所述第三透镜具有负光焦度且其物侧面为凹面。
  3. 根据权利要求1或2所述的摄像镜头，其特征在于，所述第一透镜组具有正光焦度，所述第二透镜组具有负光焦度。
  4. 根据权利要求1或2所述的摄像镜头，其特征在于，-1.2＜F1/F2＜-0.6，其中F1为所述第一透镜组的有效焦距，F2为所述第二透镜组的有效焦距。
  5. 根据权利要求3所述的摄像镜头，其特征在于，在所述第二透镜与被测物之间设置有光阑。
  6. 根据权利要求1所述的摄像镜头，其特征在于，1＜DT11/DT21＜1.5，DT11为所述第一透镜的物侧面的有效半径，DT21为所述第二透镜的物侧面的有效半径。
  7. 根据权利要求1所述的摄像镜头，其特征在于，0.3＜∑CT/TTL＜0.5，∑CT为所述第一透镜至最后一个透镜在光轴上的中心厚度总和，TTL为所 述第一透镜的物侧面至成像面的轴上距离。
  8. 根据权利要求1或2所述的摄像镜头，其特征在于，1＜DT12/DT21＜1.3，DT12为所述第一透镜的像侧面的有效半径，DT21为所述第二透镜的物侧面的有效半径。
  9. 根据权利要求1或2所述的摄像镜头，其特征在于，0.3＜CT2/CT1＜0.8，CT2为所述第二透镜在光轴上的中心厚度，CT1为所述第一透镜在光轴上的中心厚度。
  10. 根据权利要求1所述的摄像镜头，其特征在于，所述滤光片为IR红外滤光片。
  11. 一种摄像镜头，由物侧至像侧依次包括第一透镜组和第二透镜组，其特征在于，
    所述第一透镜组包括第一透镜和第二透镜；
    所述第二透镜组包括至少一个第三透镜；
    在所述第二透镜组和所述像侧之间设置有滤光片；以及
    所述第一透镜的物侧面的有效半径DT11与所述第二透镜的物侧面的有效半径DT21之间满足1＜DT11/DT21＜1.5。
  12. 根据权利要求11所述的摄像镜头，其特征在于，
    所述第一透镜具有正光焦度，其物侧面为凸面，像侧面为凹面，
    所述第二透镜具有正光焦度或负光焦度，
    所述第一透镜和所述第二透镜中的至少一者为玻璃镜片，以及
    所述第三透镜具有负光焦度且其物侧面为凹面。
  13. 根据权利要求11或12所述的摄像镜头，其特征在于，所述第一透镜组具有正光焦度，所述第二透镜组具有负光焦度。
  14. 根据权利要求11或12所述的摄像镜头，其特征在于，-1.2＜F1/F2＜-0.6，F1为所述第一透镜组的有效焦距，F2为所述第二透镜组的有效焦距。
  15. 根据权利要求13所述的摄像镜头，其特征在于，在所述第二透镜与被测物之间设置有光阑。
  16. 根据权利要求12所述的摄像镜头，其特征在于，所述第一透镜的物侧面的曲率半径R1与所述第一透镜的像侧面的曲率半径R2之间满足0.5＜R1/R2＜1。
  17. 根据权利要求11所述的摄像镜头，其特征在于，0.3＜∑CT/TTL＜0.5，∑CT为所述第一透镜至最后一透镜在光轴上的中心厚度总和，TTL为所述第一透镜的物侧面至成像面的轴上距离。
  18. 根据权利要求11或12所述的摄像镜头，其特征在于，1＜DT12/DT21＜1.3，DT12为所述第一透镜的像侧面的有效半径，DT21为所述第二透镜的物侧面的有效半径。
  19. 根据权利要求11或12所述的摄像镜头，其特征在于，0.3＜CT2/CT1＜0.8，CT2为所述第二透镜在光轴上的中心厚度，CT1为所述第一透镜在光轴上的中心厚度。
  20. 根据权利要求11所述的摄像镜头，其特征在于，所述滤光片为IR红外滤光片。
  21. 一种摄像镜头，由物侧至像侧依次包括第一透镜组和第二透镜组，其特征在于，
    所述第一透镜组包括第一透镜和第二透镜；
    所述第二透镜组包括至少一个第三透镜；
    在所述第二透镜组和所述像侧之间设置有滤光片；以及
    所述第一透镜至最后一个透镜在光轴上的中心厚度总和∑CT与所述第一透镜的物侧面至成像面的轴上距离TTL之间满足0.3＜∑CT/TTL＜0.5。
  22. 根据权利要求21所述的摄像镜头，其特征在于，
    所述第一透镜具有正光焦度，其物侧面为凸面，像侧面为凹面，
    所述第二透镜具有正光焦度或负光焦度，
    所述第一透镜和所述第二透镜中的至少一者为玻璃镜片，以及
    所述第三透镜具有负光焦度且其物侧面为凹面。
  23. 根据权利要求21或22所述的摄像镜头，其特征在于，所述第一透镜组具有正光焦度，所述第二透镜组具有负光焦度。
  24. 根据权利要求21或22所述的摄像镜头，其特征在于，-1.2＜F1/F2＜-0.6，F1为所述第一透镜组的有效焦距，F2为所述第二透镜组的有效焦距。
  25. 根据权利要求23所述的摄像镜头，其特征在于，在所述第二透镜与被测物之间设置有光阑。
  26. 根据权利要求22所述的摄像镜头，其特征在于，所述第一透镜的物侧面的曲率半径R1与所述第一透镜的像侧面的曲率半径R2之间满足0.5＜R1/R2＜1。
  27. 根据权利要求22所述的摄像镜头，其特征在于，所述第一透镜物侧面的有效半径DT11与所述第二透镜物侧面的有效半径DT21之间满足1＜DT11/DT21＜1.5。
  28. 根据权利要求21或22所述的摄像镜头，其特征在于，1＜DT12/DT21＜1.3，DT12为所述第一透镜的像侧面的有效半径，DT21为 所述第二透镜的物侧面的有效半径。
  29. 根据权利要求21或22所述的摄像镜头，其特征在于，0.3＜CT2/CT1＜0.8，CT2为所述第二透镜在光轴上的中心厚度，CT1为所述第一透镜在光轴上的中心厚度。
  30. 根据权利要求21所述的摄像镜头，其特征在于，所述滤光片为IR红外滤光片。
PCT/CN2017/096591 2017-04-18 2017-08-09 摄像镜头 WO2018192144A1 (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US15/772,744 US11579410B2 (en) 2017-04-18 2017-08-09 Camera lens assembly

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN201720406880.1 2017-04-18
CN201710255925.4 2017-04-18
CN201720406880.1U CN206671658U (zh) 2017-04-18 2017-04-18 摄像镜头
CN201710255925.4A CN106842514B (zh) 2017-04-18 2017-04-18 摄像镜头

Publications (1)

Publication Number Publication Date
WO2018192144A1 true WO2018192144A1 (zh) 2018-10-25

Family

ID=63856129

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2017/096591 WO2018192144A1 (zh) 2017-04-18 2017-08-09 摄像镜头

Country Status (2)

Country Link
US (1) US11579410B2 (zh)
WO (1) WO2018192144A1 (zh)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102955225A (zh) * 2011-08-19 2013-03-06 佛山普立华科技有限公司 成像镜头
US20150085383A1 (en) * 2013-09-24 2015-03-26 Sekonix Co., Ltd. Wide-angle photographic lens system enabling correction of distortion
CN105259641A (zh) * 2015-11-17 2016-01-20 中山联合光电科技股份有限公司 一种虹膜识别光学成像镜头
CN105445903A (zh) * 2015-04-30 2016-03-30 北京天诚盛业科技有限公司 成像镜头、虹膜成像模组以及虹膜识别装置
CN106405796A (zh) * 2016-11-15 2017-02-15 浙江舜宇光学有限公司 光学成像***及摄像装置
CN106443972A (zh) * 2016-11-29 2017-02-22 福建师范大学 虹膜识别光学成像透镜组及其成像方法
CN106842514A (zh) * 2017-04-18 2017-06-13 浙江舜宇光学有限公司 摄像镜头

Family Cites Families (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005284153A (ja) 2004-03-30 2005-10-13 Nidec Copal Corp 撮像レンズ
CN101135767A (zh) 2006-08-29 2008-03-05 亚洲光学股份有限公司 取像镜头
US8558939B2 (en) * 2009-10-16 2013-10-15 Konica Minolta Advanced Layers, Inc. Image pickup lens and image pickup apparatus
CN103403601B (zh) 2011-02-24 2015-07-15 柯尼卡美能达株式会社 摄像透镜、摄像装置以及便携终端
TWI440885B (zh) * 2011-08-25 2014-06-11 Hon Hai Prec Ind Co Ltd 取像鏡頭
JP5952135B2 (ja) 2012-08-28 2016-07-13 カンタツ株式会社 超小型撮像レンズ
TWI451120B (zh) * 2012-11-29 2014-09-01 Largan Precision Co Ltd 拾像系統鏡頭組
KR101425792B1 (ko) * 2012-12-31 2014-08-06 주식회사 코렌 촬영 렌즈 광학계
JP6146741B2 (ja) * 2013-07-29 2017-06-14 株式会社オプトロジック 撮像レンズ
US9354423B2 (en) * 2013-11-08 2016-05-31 Samsung Electro-Mechanics Co., Ltd. Lens module
TWI472825B (zh) 2013-11-13 2015-02-11 Largan Precision Co Ltd 取像透鏡組、取像裝置及可攜裝置
TWI537594B (zh) * 2013-12-16 2016-06-11 信泰光學（深圳）有限公司 近紅外線鏡頭
CN103955047B (zh) 2014-03-23 2016-08-17 浙江舜宇光学有限公司 摄像镜头及其模组和终端
CN105095845A (zh) 2014-05-22 2015-11-25 宁波舜宇光电信息有限公司 虹膜和人脸识别***及其应用和方法
KR101719877B1 (ko) 2014-12-05 2017-03-24 삼성전기주식회사 렌즈 모듈
CN105445900B (zh) 2015-03-09 2017-09-12 北京天诚盛业科技有限公司 成像镜头、虹膜成像模组以及虹膜识别装置
CN106033142B (zh) 2015-03-12 2018-08-31 佳能企业股份有限公司 光学镜头
CN106154511B (zh) * 2015-04-08 2019-08-13 亚太精密工业(深圳)有限公司 红外线追踪镜头
KR102494776B1 (ko) 2015-08-04 2023-02-02 엘지이노텍 주식회사 촬상렌즈
CN105137567B (zh) 2015-08-12 2017-09-12 北京天诚盛业科技有限公司 成像镜头、虹膜成像模组以及虹膜识别装置
TWI627438B (zh) * 2015-11-12 2018-06-21 柯尼卡美能達股份有限公司 鏡頭單元、攝像裝置及行動機器
CN205333955U (zh) 2015-12-30 2016-06-22 广东旭业光电科技股份有限公司 光学成像镜头和应用该光学成像镜头的虹膜识别设备
TWI587000B (zh) * 2016-02-02 2017-06-11 大立光電股份有限公司 取像系統鏡組、取像裝置及電子裝置
KR102663749B1 (ko) * 2016-02-17 2024-05-08 삼성전자주식회사 옵티칼 렌즈 어셈블리, 장치, 및 이미지 형성 방법
CN206039009U (zh) 2016-08-31 2017-03-22 浙江舜宇光学有限公司 摄像镜头
TWI631365B (zh) * 2016-11-03 2018-08-01 先進光電科技股份有限公司 光學成像系統

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102955225A (zh) * 2011-08-19 2013-03-06 佛山普立华科技有限公司 成像镜头
US20150085383A1 (en) * 2013-09-24 2015-03-26 Sekonix Co., Ltd. Wide-angle photographic lens system enabling correction of distortion
CN105445903A (zh) * 2015-04-30 2016-03-30 北京天诚盛业科技有限公司 成像镜头、虹膜成像模组以及虹膜识别装置
CN105259641A (zh) * 2015-11-17 2016-01-20 中山联合光电科技股份有限公司 一种虹膜识别光学成像镜头
CN106405796A (zh) * 2016-11-15 2017-02-15 浙江舜宇光学有限公司 光学成像***及摄像装置
CN106443972A (zh) * 2016-11-29 2017-02-22 福建师范大学 虹膜识别光学成像透镜组及其成像方法
CN106842514A (zh) * 2017-04-18 2017-06-13 浙江舜宇光学有限公司 摄像镜头

Also Published As

Publication number Publication date
US11579410B2 (en) 2023-02-14
US20200257080A1 (en) 2020-08-13

Similar Documents

Publication Publication Date Title
WO2019210738A1 (zh) 光学成像镜头
WO2018103250A1 (zh) 摄像镜头及摄像装置
TWI633329B (zh) 光學成像鏡頭
WO2019214334A1 (zh) 摄像镜头组
WO2019056817A1 (zh) 光学成像***
WO2019052179A1 (zh) 成像透镜组
WO2019062136A1 (zh) 摄像透镜组
TWI490533B (zh) 攝像裝置與其光學成像鏡頭
WO2019174286A1 (zh) 光学成像镜片组
WO2018209890A1 (zh) 成像镜头
WO2019137055A1 (zh) 摄像透镜***
WO2020082818A1 (zh) 摄像镜头组
WO2018218889A1 (zh) 光学成像***
WO2019019626A1 (zh) 成像镜头
WO2018188236A1 (zh) 摄像镜头光学成像***
WO2021007930A1 (zh) 一种近距离成像用微型成像镜头
WO2019047505A1 (zh) 光学成像镜头
WO2019024490A1 (zh) 光学成像镜头
CN107390350B (zh) 成像透镜组
WO2019037420A1 (zh) 摄像透镜组
TW201500760A (zh) 可攜式電子裝置與其光學成像鏡頭
WO2019085524A1 (zh) 光学成像***
WO2017113557A1 (zh) 摄像镜头
WO2019052180A1 (zh) 摄像镜头组
CN106842514B (zh) 摄像镜头

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 17906182

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 17906182

Country of ref document: EP

Kind code of ref document: A1