WO2021127887A1 - Lentille optique de caméra - Google Patents

Lentille optique de caméra Download PDF

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Publication number
WO2021127887A1
WO2021127887A1 PCT/CN2019/127560 CN2019127560W WO2021127887A1 WO 2021127887 A1 WO2021127887 A1 WO 2021127887A1 CN 2019127560 W CN2019127560 W CN 2019127560W WO 2021127887 A1 WO2021127887 A1 WO 2021127887A1
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lens
curvature
radius
ttl
imaging optical
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PCT/CN2019/127560
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English (en)
Chinese (zh)
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马健
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诚瑞光学(常州)股份有限公司
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Priority to PCT/CN2019/127560 priority Critical patent/WO2021127887A1/fr
Publication of WO2021127887A1 publication Critical patent/WO2021127887A1/fr

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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
    • G02B13/18—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
    • G02B9/00—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or -
    • G02B9/64—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having more than six components

Definitions

  • This application relates to the field of optical lenses, and in particular to a camera optical lens suitable for portable terminal equipment such as smart phones and digital cameras, as well as camera devices such as monitors and PC lenses.
  • the photosensitive devices of general photographic lenses are nothing more than photosensitive coupled devices (CCD) or complementary metal oxide semiconductor devices (Complementary Metal).
  • CCD photosensitive coupled devices
  • CMOS Sensor complementary metal oxide semiconductor devices
  • the lenses traditionally mounted on mobile phone cameras mostly adopt a three-element or four-element lens structure.
  • the pixel area of photosensitive devices continues to shrink and the system's requirements for image quality continue to increase, five-chip, six-chip, seven-chip, and eight-chip
  • the chip lens structure gradually appeared in lens design. There is an urgent need for an ultra-thin wide-angle camera optical lens with excellent optical characteristics.
  • the purpose of the present application is to provide an imaging optical lens that can meet the requirements of large aperture, ultra-thinness, and wide-angle while achieving high imaging performance.
  • the imaging optical lens includes a first lens, a second lens, a third lens, and a fourth lens in order from the object side to the image side.
  • the focal length of the imaging optical lens is f
  • the focal length of the first lens is f1
  • the focal length of the second lens is f2
  • the radius of curvature of the object side of the third lens is R5
  • the focal length of the third lens The curvature radius of the image side is R6, the on-axis thickness of the second lens is d3, and the on-axis distance from the image side of the second lens to the object side of the third lens is d4, which satisfies the following relationship: 0.60 ⁇ f1/f ⁇ 1.90; f2 ⁇ 0; 0.28 ⁇ (R5+R6)/(R5-R6) ⁇ 1.00; 2.50 ⁇ d3/d4 ⁇ 8.00.
  • the focal length of the fourth lens is f4, and satisfies the following relationship: -5.50 ⁇ f4/f ⁇ -3.50.
  • the radius of curvature of the object side of the first lens is R1
  • the radius of curvature of the image side of the first lens is R2
  • the axial thickness of the first lens is d1
  • the optical The total length is TTL and satisfies the following relationship: -6.04 ⁇ (R1+R2)/(R1-R2) ⁇ -0.68; 0.05 ⁇ d1/TTL ⁇ 0.22.
  • the curvature radius of the object side surface of the second lens is R3
  • the curvature radius of the image side surface of the second lens is R4
  • the total optical length of the imaging optical lens is TTL, and the following relationship is satisfied: -56.55 ⁇ f2/f ⁇ -1.92; 1.41 ⁇ (R3+R4)/(R3-R4) ⁇ 26.58; 0.02 ⁇ d3/TTL ⁇ 0.16.
  • the focal length of the third lens is f3, the axial thickness of the third lens is d5, the total optical length of the imaging optical lens is TTL, and the following relationship is satisfied: 1.08 ⁇ f3/f ⁇ 69.18; 0.03 ⁇ d5/TTL ⁇ 0.10.
  • the radius of curvature of the object side of the fourth lens is R7
  • the radius of curvature of the image side of the fourth lens is R8,
  • the axial thickness of the fourth lens is d7
  • the optical The total length is TTL and satisfies the following relationship: -2.29 ⁇ (R7+R8)/(R7-R8) ⁇ -0.27; 0.02 ⁇ d7/TTL ⁇ 0.10.
  • the focal length of the fifth lens is f5, the radius of curvature of the object side of the fifth lens is R9, the radius of curvature of the image side of the fifth lens is R10, and the on-axis thickness of the fifth lens is Is d9, the total optical length of the camera optical lens is TTL, and satisfies the following relationship: -53.58 ⁇ f5/f ⁇ 38.74; -4.35 ⁇ (R9+R10)/(R9-R10) ⁇ 23.42; 0.04 ⁇ d9/ TTL ⁇ 0.11.
  • the focal length of the sixth lens is f6, the radius of curvature of the object side of the sixth lens is R11, the radius of curvature of the image side of the sixth lens is R12, and the on-axis thickness of the sixth lens is Is d11, the total optical length of the camera optical lens is TTL, and satisfies the following relationship: -2.78 ⁇ f6/f ⁇ -0.61; 0.79 ⁇ (R11+R12)/(R11-R12) ⁇ 2.44; 0.03 ⁇ d11/ TTL ⁇ 0.09.
  • the focal length of the seventh lens is f7
  • the radius of curvature of the object side of the seventh lens is R13
  • the radius of curvature of the image side of the seventh lens is R14
  • the on-axis thickness of the seventh lens is Is d13
  • the total optical length of the camera optical lens is TTL, and satisfies the following relationship: 0.24 ⁇ f7/f ⁇ 0.88; -2.35 ⁇ (R13+R14)/(R13-R14) ⁇ -0.61; 0.04 ⁇ d13/ TTL ⁇ 0.12.
  • the focal length of the eighth lens is f8, the radius of curvature of the object side of the eighth lens is R15, the radius of curvature of the image side of the eighth lens is R16, and the on-axis thickness of the eighth lens Is d15, the total optical length of the camera optical lens is TTL, and satisfies the following relationship: -1.56 ⁇ f8/f ⁇ -0.45; -1.02 ⁇ (R15+R16)/(R15-R16) ⁇ -0.19; 0.03 ⁇ d15/TTL ⁇ 0.09.
  • the imaging optical lens according to the present application has excellent optical characteristics, meets the requirements of large aperture, ultra-thin and wide-angle, and is especially suitable for mobile phones composed of high-pixel CCD, CMOS and other imaging elements Camera lens assembly and WEB camera lens.
  • FIG. 1 is a schematic diagram of the structure of an imaging optical lens according to a first embodiment of the present application
  • FIG. 2 is a schematic diagram of axial aberration of the imaging optical lens shown in FIG. 1;
  • FIG. 3 is a schematic diagram of the chromatic aberration of magnification of the imaging optical lens shown in FIG. 1;
  • FIG. 4 is a schematic diagram of field curvature and distortion of the imaging optical lens shown in FIG. 1;
  • FIG. 5 is a schematic diagram of the structure of an imaging optical lens according to a second embodiment of the present application.
  • FIG. 6 is a schematic diagram of axial aberration of the imaging optical lens shown in FIG. 5;
  • FIG. 7 is a schematic diagram of the chromatic aberration of magnification of the imaging optical lens shown in FIG. 5;
  • FIG. 8 is a schematic diagram of field curvature and distortion of the imaging optical lens shown in FIG. 5;
  • FIG. 9 is a schematic diagram of the structure of an imaging optical lens according to a third embodiment of the present application.
  • FIG. 10 is a schematic diagram of axial aberration of the imaging optical lens shown in FIG. 9;
  • FIG. 11 is a schematic diagram of the chromatic aberration of magnification of the imaging optical lens shown in FIG. 9;
  • FIG. 12 is a schematic diagram of field curvature and distortion of the imaging optical lens shown in FIG. 9.
  • FIG. 1 shows an imaging optical lens 10 according to the first embodiment of the application.
  • the imaging optical lens 10 includes eight lenses. Specifically, the imaging optical lens 10 includes in order from the object side to the image side: an aperture S1, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, and a sixth lens L6. , The seventh lens L7 and the eighth lens L8.
  • An optical element such as an optical filter GF may be provided between the eighth lens L8 and the image plane Si.
  • the focal length of the overall imaging optical lens 10 is defined as f
  • the focal length of the first lens L1 is defined as f1, which satisfies the relationship: 0.60 ⁇ f1/f ⁇ 1.90.
  • the ratio of the focal length of the first lens L1 to the total focal length of the system is specified, which can effectively balance the spherical aberration and curvature of field of the system.
  • it satisfies: 0.73 ⁇ f1/f ⁇ 1.86.
  • the focal length of the second lens L2 is defined as f2, which satisfies: f2 ⁇ 0. Therefore, the positive and negative of the focal length of the second lens L2 are specified, and the reasonable allocation of the focal length enables the system to have better imaging quality and lower sensitivity.
  • the curvature radius of the object side surface of the third lens L3 is defined as R5, and the curvature radius of the image side surface of the third lens L3 is defined as R6, which satisfies the relationship: 0.28 ⁇ (R5+R6)/(R5-R6) ⁇ 1.00.
  • the shape of the third lens L3 is specified, and within the specified range of the conditional expression, the degree of deflection of light passing through the lens can be alleviated, and aberrations can be effectively reduced.
  • it satisfies: 0.31 ⁇ (R5+R6)/(R5-R6) ⁇ 0.95.
  • the on-axis thickness of the second lens L2 is defined as d3, and the on-axis distance from the image side surface of the second lens L2 to the object side surface of the third lens L3 is d4, which satisfies the relationship: 2.50 ⁇ d3/d4 ⁇ 8.00.
  • the ratio of the on-axis thickness of the second lens L2 to the on-axis air spacing of the second lens L2 and the third lens L3 is specified, which helps to compress the total length of the optical system within the scope of the conditional expression and achieves an ultra-thinning effect.
  • it satisfies: 2.60 ⁇ d3/d4 ⁇ 7.83.
  • the imaging optical lens 10 When the focal length of the imaging optical lens 10, the focal length of each lens, the on-axis distance from the image side of the relevant lens to the object side, and the on-axis thickness satisfy the above-mentioned relational expressions, the imaging optical lens 10 can be made to have high performance and satisfy Low TTL design requirements.
  • the focal length of the fourth lens L4 is defined as f4, and the focal length of the overall imaging optical lens 10 is defined as f, which satisfies the relationship: -5.50 ⁇ f4/f ⁇ -3.50.
  • the ratio of the focal length of the fourth lens L4 to the total focal length of the system is specified, which helps to improve the performance of the optical system within the range of the conditional expression.
  • it satisfies: -5.28 ⁇ f4/f ⁇ -3.53.
  • the first lens L1 has a positive refractive power.
  • the object side surface of the first lens L1 is convex on the near optical axis, and the image side surface is concave on the near optical axis.
  • the shape of the first lens L1 can be reasonably controlled, so that the first lens L1 can effectively correct the spherical aberration of the system.
  • it satisfies: -3.77 ⁇ (R1+R2)/(R1-R2) ⁇ -0.86.
  • the on-axis thickness of the first lens L1 is defined as d1, and the total optical length of the camera optical lens is TTL, which satisfies the relationship: 0.05 ⁇ d1/TTL ⁇ 0.22, which is conducive to achieving ultra-thinness. Preferably, it satisfies: 0.08 ⁇ d1/TTL ⁇ 0.18.
  • the second lens L2 has a negative refractive power, the object side surface is convex on the near optical axis, and the image side surface is concave on the near optical axis.
  • the focal length f2 of the second lens L2 is defined, and the focal length of the overall imaging optical lens 10 is f, which satisfies the relationship: -56.55 ⁇ f2/f ⁇ -1.92.
  • f the focal length of the overall imaging optical lens 10
  • it is beneficial to correct the aberration of the optical system.
  • it satisfies: -35.35 ⁇ f2/f ⁇ -2.40.
  • the curvature radius of the object side surface of the second lens L2 as R3, and the curvature radius of the image side surface of the second lens L2 as R4, which satisfies the relationship: 1.41 ⁇ (R3+R4)/(R3-R4) ⁇ 26.58.
  • the shape of the second lens L2 is specified. When it is within the range, as the lens becomes ultra-thin and wide-angle, it is beneficial to correct the problem of axial aberration. Preferably, it satisfies: 2.25 ⁇ (R3+R4)/(R3-R4) ⁇ 21.27.
  • the on-axis thickness of the second lens L2 is defined as d3, and the total optical length of the camera optical lens is TTL, which satisfies the relationship: 0.02 ⁇ d3/TTL ⁇ 0.16, which is beneficial to realize ultra-thinness. Preferably, it satisfies: 0.03 ⁇ d3/TTL ⁇ 0.13.
  • the third lens L3 has positive refractive power.
  • the object side surface of the third lens L3 is convex on the near optical axis, and the image side surface is convex on the near optical axis.
  • the focal length of the third lens L3 is defined as f3
  • the focal length of the overall imaging optical lens 10 is defined as f, which satisfies the relationship: 1.08 ⁇ f3/f ⁇ 69.18.
  • the system has better imaging quality and lower sensitivity.
  • it satisfies: 1.73 ⁇ f3/f ⁇ 55.34.
  • the on-axis thickness of the third lens L3 is defined as d5, and the total optical length of the camera optical lens is TTL, which satisfies the relationship: 0.03 ⁇ d5/TTL ⁇ 0.10, which is conducive to achieving ultra-thinness. Preferably, it satisfies: 0.05 ⁇ d5/TTL ⁇ 0.08.
  • the fourth lens L4 has a negative refractive power.
  • the object side surface of the fourth lens L4 is concave on the near optical axis, and the image side surface is concave on the near optical axis. In other embodiments, the object side surface of the fourth lens L4 is concave on the near optical axis, and the image side surface is convex on the near optical axis.
  • the radius of curvature of the object side surface of the fourth lens L4 is R7
  • the radius of curvature of the image side surface of the fourth lens L4 is R8, which satisfies the relationship: -2.29 ⁇ (R7+R8)/(R7-R8) ⁇ -0.27.
  • the shape of the fourth lens L4 is specified. When it is within the range, with the development of ultra-thin and wide-angle, it is beneficial to correct the aberration of the off-axis angle of view. Preferably, it satisfies: -1.43 ⁇ (R7+R8)/(R7-R8) ⁇ -0.33.
  • the on-axis thickness of the fourth lens L4 is defined as d7, and the total optical length of the camera optical lens is TTL, which satisfies the relationship: 0.02 ⁇ d7/TTL ⁇ 0.10, which is conducive to achieving ultra-thinness. Preferably, it satisfies: 0.04 ⁇ d7/TTL ⁇ 0.08.
  • the fifth lens L5 has a negative refractive power. In other embodiments, the fifth lens L5 may have a negative refractive power.
  • the object side surface of the fifth lens L5 is concave on the near optical axis, and the image side surface is concave on the near optical axis. In other embodiments, the object side surface of the fifth lens L5 is concave on the near optical axis, and the image side surface is convex on the near optical axis.
  • the focal length of the fifth lens L5 is defined as f5
  • the focal length of the overall imaging optical lens 10 is defined as f, which satisfies the relationship: -53.58 ⁇ f5/f ⁇ 38.74.
  • the limitation of the fifth lens L5 can effectively make the light angle of the camera lens smooth and reduce the tolerance sensitivity. Preferably, it satisfies: -33.49 ⁇ f5/f ⁇ 30.99.
  • the radius of curvature of the object side surface of the fifth lens L5 as R9
  • the radius of curvature of the image side surface of the fifth lens L5 as R10, which satisfies the relationship: -4.35 ⁇ (R9+R10)/(R9-R10) ⁇ 23.42.
  • the shape of the fifth lens L5 is specified, and when it is within the range specified by the relational expression, with the development of ultra-thin and wide-angle, it is beneficial to correct the aberration of the off-axis angle of view. Preferably, it satisfies: -2.72 ⁇ (R9+R10)/(R9-R10) ⁇ 18.74.
  • the on-axis thickness of the fifth lens L5 is defined as d9, and the total optical length of the camera optical lens is TTL, which satisfies the relationship: 0.04 ⁇ d9/TTL ⁇ 0.11, which is conducive to achieving ultra-thinness. Preferably, it satisfies: 0.06 ⁇ d9/TTL ⁇ 0.09.
  • the sixth lens L6 has negative refractive power.
  • the object side surface of the sixth lens L6 is convex on the near optical axis, and the image side surface is concave on the near optical axis.
  • the focal length of the sixth lens L6 is defined as f6, and the focal length of the overall imaging optical lens 10 is defined as f, which satisfies the relationship: -2.78 ⁇ f6/f ⁇ -0.61.
  • the system has better imaging quality and lower sensitivity.
  • it satisfies: -1.74 ⁇ f6/f ⁇ -0.76.
  • the curvature radius of the object side surface of the sixth lens L6 is defined as R11
  • the curvature radius of the image side surface of the sixth lens L6 is defined as R12, which satisfies the relationship: 0.79 ⁇ (R11+R12)/(R11-R12) ⁇ 2.44.
  • the shape of the sixth lens L6 is specified, and when it is within the range specified by the relational expression, with the development of ultra-thin and wide-angle, it is beneficial to correct the aberration of the off-axis angle of view. Preferably, it satisfies: 1.26 ⁇ (R11+R12)/(R11-R12) ⁇ 1.96.
  • the on-axis thickness of the sixth lens L6 is defined as d11, and the total optical length of the camera optical lens is TTL, which satisfies the relationship: 0.03 ⁇ d11/TTL ⁇ 0.09, which is conducive to achieving ultra-thinness. Preferably, it satisfies: 0.04 ⁇ d11/TTL ⁇ 0.07.
  • the seventh lens L7 has positive refractive power.
  • the object side surface of the seventh lens L7 is convex on the near optical axis, and the image side surface is convex on the near optical axis. In other embodiments, the object side surface of the seventh lens L7 is convex on the near optical axis, and the image side surface is concave on the near optical axis.
  • the focal length of the seventh lens L7 is defined as f7
  • the focal length of the overall imaging optical lens 10 is defined as f, which satisfies the relationship: 0.24 ⁇ f7/f ⁇ 0.88.
  • the system has better imaging quality and lower sensitivity.
  • it satisfies: 0.38 ⁇ f7/f ⁇ 0.70.
  • the radius of curvature of the object side surface of the seventh lens L7 is R13
  • the radius of curvature of the image side surface of the seventh lens L7 is R14, which satisfies the relationship: -2.35 ⁇ (R13+R14)/(R13-R14) ⁇ -0.61.
  • the shape of the seventh lens L7 is specified, and when it is within the range specified by the relational expression, with the development of ultra-thin and wide-angle, it is beneficial to correct the aberration of the off-axis angle of view. Preferably, it satisfies: -1.47 ⁇ (R13+R14)/(R13-R14) ⁇ -0.76.
  • the on-axis thickness of the seventh lens L7 is defined as d13, and the total optical length of the imaging optical lens is TTL, which satisfies the relationship: 0.04 ⁇ d13/TTL ⁇ 0.12, which is conducive to achieving ultra-thinness. Preferably, it satisfies: 0.06 ⁇ d13/TTL ⁇ 0.10.
  • the eighth lens L8 has negative refractive power.
  • the object side surface of the eighth lens L8 is concave on the near optical axis, and the image side surface is concave on the near optical axis.
  • the focal length of the eighth lens L8 is defined as f8, and the focal length of the overall imaging optical lens 10 is defined as f, which satisfies the relationship: -1.56 ⁇ f8/f ⁇ -0.45.
  • f the focal length of the overall imaging optical lens 10
  • the radius of curvature of the object side surface of the eighth lens L8 is R15
  • the radius of curvature of the image side surface of the eighth lens L8 is R16, which satisfies the relationship: -1.02 ⁇ (R15+R16)/(R15-R16) ⁇ -0.19.
  • the shape of the eighth lens L8 is specified, and when the shape is within the range specified by the relational expression, it is beneficial to the molding of the eighth lens L8 and avoids molding defects and stress generation due to excessive surface curvature of the eighth lens L8. Preferably, it satisfies: -0.64 ⁇ (R15+R16)/(R15-R16) ⁇ -0.23.
  • the on-axis thickness of the eighth lens L8 is defined as d15, and the total optical length of the camera optical lens is TTL, which satisfies the relationship: 0.03 ⁇ d15/TTL ⁇ 0.09, which is conducive to achieving ultra-thinness. Preferably, it satisfies: 0.04 ⁇ d15/TTL ⁇ 0.07.
  • the combined focal length of the first lens L1 and the second lens L2 is defined as f12
  • the focal length of the overall imaging optical lens 10 is defined as f, which satisfies the relationship: 0.56 ⁇ f12/f ⁇ 2.69.
  • the aberration and distortion of the imaging optical lens 10 can be eliminated, the back focal length of the imaging optical lens 10 can be suppressed, and the miniaturization of the imaging lens system group can be maintained.
  • it satisfies: 0.90 ⁇ f12/f ⁇ 2.15.
  • the total optical length TTL of the imaging optical lens 10 is less than or equal to 9.68 mm.
  • the total optical length TTL is less than or equal to 9.24 mm.
  • the overall optical length TTL of the overall imaging optical lens 10 can be shortened as much as possible, and the characteristics of miniaturization can be maintained.
  • the image height is IH
  • IH and TTL satisfy the relational expression: TTL/IH ⁇ 1.47, so that the imaging optical lens 10 is ultra-thin.
  • the aperture F number of the imaging optical lens 10 is less than or equal to 1.52, and the imaging optical lens 10 has a large aperture and good imaging performance.
  • the wide angle of the imaging optical lens 10 is not less than 80°, and it has a wide-angle characteristic.
  • the imaging optical lens 10 of the present application will be described below with an example.
  • the symbols described in each example are as follows.
  • the unit of the focal length, the distance on the axis, the radius of curvature, the thickness on the axis, the position of the inflection point, and the position of the stagnation point are millimeters (mm).
  • TTL Optical length (the on-axis distance from the object side of the first lens L1 to the imaging surface), in millimeters (mm).
  • the object side and/or the image side of the lens may also be provided with inflection points and/or stagnation points to meet the requirements of high-quality imaging.
  • the specific implementation schemes are as follows.
  • Table 1 and Table 2 show the design data of the imaging optical lens 10 of the first embodiment of the present application.
  • R The radius of curvature of the optical surface, and the radius of curvature of the center of the lens
  • R1 the radius of curvature of the object side surface of the first lens L1;
  • R2 the radius of curvature of the image side surface of the first lens L1;
  • R3 the radius of curvature of the object side surface of the second lens L2;
  • R4 the radius of curvature of the image side surface of the second lens L2;
  • R5 the radius of curvature of the object side surface of the third lens L3;
  • R6 the radius of curvature of the image side surface of the third lens L3;
  • R7 the radius of curvature of the object side of the fourth lens L4;
  • R8 the radius of curvature of the image side surface of the fourth lens L4;
  • R9 the radius of curvature of the object side surface of the fifth lens L5;
  • R10 the radius of curvature of the image side surface of the fifth lens L5;
  • R11 the radius of curvature of the object side surface of the sixth lens L6;
  • R12 the radius of curvature of the image side surface of the sixth lens L6;
  • R13 the radius of curvature of the object side surface of the seventh lens L7;
  • R14 the radius of curvature of the image side surface of the seventh lens L7;
  • R15 the radius of curvature of the object side of the eighth lens L8;
  • R16 the radius of curvature of the image side surface of the eighth lens L8;
  • R17 the radius of curvature of the object side of the optical filter GF
  • R18 the radius of curvature of the image side surface of the optical filter GF
  • d0 the on-axis distance from the aperture S1 to the object side of the first lens L1;
  • d2 the on-axis distance from the image side surface of the first lens L1 to the object side surface of the second lens L2;
  • d4 the on-axis distance from the image side surface of the second lens L2 to the object side surface of the third lens L3;
  • d6 the on-axis distance from the image side surface of the third lens L3 to the object side surface of the fourth lens L4;
  • d10 the on-axis distance from the image side surface of the fifth lens L5 to the object side surface of the sixth lens L6;
  • d11 the on-axis thickness of the sixth lens L6;
  • d12 the on-axis distance from the image side surface of the sixth lens L6 to the object side surface of the seventh lens L7;
  • d14 the on-axis distance from the image side surface of the seventh lens L7 to the object side surface of the eighth lens L8;
  • d16 the on-axis distance from the image side surface of the eighth lens L8 to the object side surface of the optical filter GF;
  • d17 the axial thickness of the optical filter GF
  • nd refractive index of d-line
  • nd1 the refractive index of the d-line of the first lens L1;
  • nd2 the refractive index of the d-line of the second lens L2;
  • nd3 the refractive index of the d-line of the third lens L3;
  • nd4 the refractive index of the d-line of the fourth lens L4;
  • nd5 the refractive index of the d-line of the fifth lens L5;
  • nd6 the refractive index of the d-line of the sixth lens L6;
  • nd7 the refractive index of the d-line of the seventh lens L7;
  • nd8 the refractive index of the d-line of the eighth lens L8;
  • ndg the refractive index of the d-line of the optical filter GF
  • vg Abbe number of optical filter GF.
  • Table 2 shows the aspheric surface data of each lens in the imaging optical lens 10 of the first embodiment of the present application.
  • k is the conic coefficient
  • A4, A6, A8, A10, A12, A14, and A16 are the aspheric coefficients.
  • the aspheric surface of each lens surface uses the aspheric surface shown in the above formula (1).
  • this application is not limited to the aspheric polynomial form represented by the formula (1).
  • Table 3 and Table 4 show the design data of the inflection point and stagnation point of each lens in the imaging optical lens 10 provided by the first embodiment of the present application.
  • P1R1 and P1R2 represent the object side and image side of the first lens L1 respectively
  • P2R1 and P2R2 represent the object side and image side of the second lens L2 respectively
  • P3R1 and P3R2 represent the object side and image side of the third lens L3 respectively.
  • P4R1, P4R2 represent the object side and image side of the fourth lens L4
  • P5R1, P5R2 represent the object side and image side of the fifth lens L5
  • P6R1, P6R2 represent the object side and image side of the sixth lens L6
  • P7R1 P7R2 represents the object side and image side of the seventh lens L7, respectively
  • P8R1 and P8R2 represent the object side and the image side of the eighth lens L8, respectively.
  • the data corresponding to the “reflection point position” column is the vertical distance from the reflex point set on the surface of each lens to the optical axis of the imaging optical lens 10.
  • the data corresponding to the “stationary point position” column is the vertical distance from the stationary point set on the surface of each lens to the optical axis of the imaging optical lens 10.
  • P2R1 1 1.205 To To P2R2 2 1.445 2.105 To P3R1 To To To To P3R2 2 0.185 1.915 To P4R1 To To To To To P4R2 2 0.465 2.045 To P5R1 1 2.175 To To P5R2 2 0.235 2.325 To P6R1 2 0.865 2.555 To P6R2 2 0.545 2.775 To P7R1 2 0.975 3.075 To P7R2 2 0.255 1.225 To P8R1 2 2.125 4.785 To P8R2 3 0.595 4.375 5.005
  • Stagnation position 1 Stagnation position 2 P1R1 To To To To P1R2 To To To P2R1 1 2.055 To P2R2 To To To To To P3R2 1 0.315 To P4R1 To To To To P4R2 1 0.635 To P5R1 To To To To P5R2 1 0.375 To P6R1 1 1.395 To P6R2 1 1.195 To P7R1 1 1.905 To P7R2 2 0.455 1.685 P8R1 1 4.095 To P8R2 1 1.095 To
  • FIG. 2 and 3 respectively show schematic diagrams of axial aberration and chromatic aberration of magnification after light having wavelengths of 656 nm, 587 nm, 546 nm, 486 nm, and 435 nm pass through the imaging optical lens 10 of the first embodiment.
  • FIG. 4 shows a schematic diagram of field curvature and distortion of light with a wavelength of 546 nm after passing through the imaging optical lens 10 of the first embodiment.
  • the field curvature S is the field curvature in the sagittal direction
  • T is the field curvature in the meridian direction.
  • Table 13 shows the values corresponding to the various values in each of Examples 1, 2, and 3 and the parameters that have been specified in the conditional expressions.
  • the first embodiment satisfies various conditional expressions.
  • the entrance pupil diameter of the imaging optical lens 10 is 4.793 mm
  • the full-field image height is 6.000 mm
  • the diagonal viewing angle is 80.00°.
  • the imaging optical lens 10 is wide-angled and ultra-thin. The on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.
  • the second embodiment is basically the same as the first embodiment, and the meaning of the symbols is the same as that of the first embodiment, and only the differences are listed below.
  • Table 5 and Table 6 show the design data of the imaging optical lens 20 of the second embodiment of the present application.
  • Table 6 shows the aspheric surface data of each lens in the imaging optical lens 20 of the second embodiment of the present application.
  • Table 7 and Table 8 show the design data of the inflection point and stagnation point of each lens in the imaging optical lens 20 of the second embodiment of the present application.
  • FIG. 6 and 7 respectively show schematic diagrams of axial aberration and chromatic aberration of magnification after light with wavelengths of 656 nm, 587 nm, 546 nm, 486 nm, and 435 nm passes through the imaging optical lens 20 provided in the second embodiment.
  • FIG. 8 shows a schematic diagram of field curvature and distortion of light with a wavelength of 546 nm after passing through the imaging optical lens 20 of the second embodiment.
  • the second embodiment satisfies various conditional expressions.
  • the entrance pupil diameter of the imaging optical lens 20 is 4.539 mm, the full-field image height is 6.000 mm, and the diagonal viewing angle is 80.00°.
  • the imaging optical lens 20 is wide-angled and ultra-thin. The on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.
  • the third embodiment is basically the same as the first embodiment, and the meaning of the symbols is the same as that of the first embodiment, and only the differences are listed below.
  • Table 9 and Table 10 show the design data of the imaging optical lens 30 provided by the third embodiment of the present application.
  • Table 10 shows the aspheric surface data of each lens in the imaging optical lens 30 of the third embodiment of the present application.
  • Table 11 and Table 12 show the design data of the inflection point and stagnation point of each lens in the imaging optical lens 30 of the third embodiment of the present application.
  • FIG. 10 and 11 respectively show schematic diagrams of axial aberration and chromatic aberration of magnification after light having wavelengths of 656 nm, 587 nm, 546 nm, 486 nm, and 435 nm pass through the imaging optical lens 30 of the third embodiment.
  • FIG. 12 shows a schematic diagram of field curvature and distortion after light with a wavelength of 546 nm passes through the imaging optical lens 30 of the third embodiment.
  • the entrance pupil diameter of the imaging optical lens 30 is 4.539 mm
  • the full-field image height is 6.000 mm
  • the diagonal viewing angle is 83.80°.
  • the imaging optical lens 30 has a wide-angle and ultra-thin view. The on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.
  • Example 1 Example 2
  • Example 3 f1/f 0.86 1.31 1.82 f2 -20.00 -32.46 -186.09 (R5+R6)/(R5-R6) 0.33 0.53 0.90 d3/d4 2.70 5.50 7.66

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

Abstract

L'invention concerne une lentille optique de caméra (10), qui comprend dans l'ordre d'un côté objet à un côté image : une première lentille (L1), une deuxième lentille (L2), une troisième lentille (L3), une quatrième lentille (L4), une cinquième lentille (L5), une sixième lentille (L6), une septième lentille (L7) et une huitième lentille (L8), où 0,60 ≤ f1/f ≤ 1,90 ; f2 ≤ 0 ; 0,28 ≤ (R5+R6)/(R5-R6) ≤ 1,00 ; et 2,50 ≤ d3/d4 ≤ 8,00. La lentille optique de caméra (10) présente les propriétés optiques d'une grande ouverture, d'un grand angle et d'une ultra-minceur.
PCT/CN2019/127560 2019-12-23 2019-12-23 Lentille optique de caméra WO2021127887A1 (fr)

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PCT/CN2019/127560 WO2021127887A1 (fr) 2019-12-23 2019-12-23 Lentille optique de caméra

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Application Number Priority Date Filing Date Title
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170045714A1 (en) * 2015-08-11 2017-02-16 Largan Precision Co.,Ltd. Photographing optical lens assembly, image capturing unit and electronic device
CN108873272A (zh) * 2018-08-02 2018-11-23 浙江舜宇光学有限公司 光学成像镜头
CN109581631A (zh) * 2019-01-21 2019-04-05 浙江舜宇光学有限公司 成像镜头
CN110554485A (zh) * 2019-10-17 2019-12-10 浙江舜宇光学有限公司 光学成像镜头

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170045714A1 (en) * 2015-08-11 2017-02-16 Largan Precision Co.,Ltd. Photographing optical lens assembly, image capturing unit and electronic device
CN108873272A (zh) * 2018-08-02 2018-11-23 浙江舜宇光学有限公司 光学成像镜头
CN109581631A (zh) * 2019-01-21 2019-04-05 浙江舜宇光学有限公司 成像镜头
CN110554485A (zh) * 2019-10-17 2019-12-10 浙江舜宇光学有限公司 光学成像镜头

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