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WO2021114248A1 - Lentille optique de caméra - Google Patents

Lentille optique de caméra Download PDF

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Publication number
WO2021114248A1
WO2021114248A1 PCT/CN2019/125233 CN2019125233W WO2021114248A1 WO 2021114248 A1 WO2021114248 A1 WO 2021114248A1 CN 2019125233 W CN2019125233 W CN 2019125233W WO 2021114248 A1 WO2021114248 A1 WO 2021114248A1
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Prior art keywords
lens
curvature
radius
imaging optical
ttl
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PCT/CN2019/125233
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English (en)
Chinese (zh)
Inventor
朱军彦
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AAC Optics Changzhou Co Ltd
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AAC Optics Changzhou Co Ltd
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Priority to PCT/CN2019/125233 priority Critical patent/WO2021114248A1/fr
Publication of WO2021114248A1 publication Critical patent/WO2021114248A1/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
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/06—Panoramic objectives; So-called "sky lenses" including panoramic objectives having reflecting surfaces
    • 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

Definitions

  • the present invention relates to the field of optical lenses, in particular to an imaging optical lens suitable for portable terminal equipment such as smart phones and digital cameras, as well as imaging 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 miniaturized camera lens with image quality has become the mainstream in the current market.
  • the lenses traditionally mounted on mobile phone cameras often adopt three-element, four-element, or even five-element or six-element lens structures.
  • the pixel area of the photosensitive device continues to shrink, and the system's requirements for image quality continue to increase, the eight-element lens structure gradually appears in the lens design, and it is common Although the eight-element lens has good optical performance, its optical power, lens spacing and lens shape settings are still unreasonable, resulting in the lens structure having good optical performance, but cannot meet the requirements of large aperture, Design requirements for ultra-thin and wide-angle.
  • the object of the present invention is to provide an imaging optical lens that can meet the requirements of ultra-thin and wide-angle while obtaining high imaging performance.
  • the embodiments of the present invention provide an imaging optical lens.
  • 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 on-axis thickness of the third lens is d5
  • the on-axis distance from the image side surface of the third lens to the object side surface of the fourth lens is d6, and the following relationship is satisfied: 1.50 ⁇ d5/d6 ⁇ 4.00 .
  • the focal length of the fifth lens is f5
  • the focal length of the sixth lens is f6, and the following relationship is satisfied: 3.50 ⁇ f5/f6 ⁇ 6.00.
  • the radius of curvature of the object side surface of the first lens is R1
  • the radius of curvature of the image side surface of the first lens is R2
  • the axial thickness of the first lens is d1
  • the total optical length of the imaging optical lens is TTL
  • the radius of curvature of the object side surface of the second lens is R3, the radius of curvature of the image side surface of the second lens is R4, the axial thickness of the second lens is d3, and the total optical length of the imaging optical lens is TTL, and satisfies the following relationship: -443.09 ⁇ f2/f ⁇ -22.52; 18.63 ⁇ (R3+R4)/(R3-R4) ⁇ 141.75; 0.01 ⁇ d3/TTL ⁇ 0.04.
  • the focal length of the third lens is f3, the radius of curvature of the object side of the third lens is R5, the radius of curvature of the image side of the third lens is R6, and the on-axis thickness of the third lens is d5 ,
  • the total optical length of the camera optical lens is TTL, and satisfies the following relationship: 0.50 ⁇ f3/f ⁇ 1.59; -0.41 ⁇ (R5+R6)/(R5-R6) ⁇ -0.12; 0.05 ⁇ d5/TTL ⁇ 0.15.
  • the focal length of the fourth lens is f4
  • 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, and the on-axis thickness of the fourth lens is d7
  • the total optical length of the camera optical lens is TTL, and satisfies the following relationship: -7.30 ⁇ f4/f ⁇ -2.34; 1.62 ⁇ (R7+R8)/(R7-R8) ⁇ 5.02; 0.01 ⁇ d7/TTL ⁇ 0.05.
  • 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
  • the on-axis thickness of the fifth lens is d9
  • the total optical length of the camera optical lens is TTL, and satisfies the following relationship: -28.44 ⁇ f5/f ⁇ -7.69; 1.86 ⁇ (R9+R10)/(R9-R10) ⁇ 6.84; 0.02 ⁇ d9/TTL ⁇ 0.05.
  • 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 d11 ,
  • the total optical length of the camera optical lens is TTL, and satisfies the following relationship: -6.18 ⁇ f6/f ⁇ -1.68; 2.04 ⁇ (R11+R12)/(R11-R12) ⁇ 7.94; 0.03 ⁇ d11/TTL ⁇ 0.08.
  • 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 d13
  • the total optical length of the camera optical lens is TTL, and satisfies the following relationship: 0.46 ⁇ f7/f ⁇ 1.47; -3.72 ⁇ (R13+R14)/(R13-R14) ⁇ -0.82; 0.04 ⁇ d13/TTL ⁇ 0.20.
  • 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: -1.51 ⁇ f8/f ⁇ -0.43; -0.94 ⁇ (R15+R16)/(R15-R16) ⁇ -0.19; 0.04 ⁇ d15/ TTL ⁇ 0.22.
  • the imaging optical lens according to the present invention has good optical performance, and has the characteristics of large aperture, wide angle, and ultra-thinness, and is especially suitable for mobile phones composed of high-pixel CCD, CMOS and other imaging elements.
  • Camera lens assembly and WEB camera lens are examples of the imaging optical lens according to the present invention.
  • FIG. 1 is a schematic diagram of the structure of an imaging optical lens according to a first embodiment of the present invention
  • 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 invention.
  • 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 invention.
  • 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 a first embodiment of the present invention.
  • 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. Lens L6, seventh lens L7, and 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 first lens has positive refractive power
  • the second lens has negative refractive power
  • the third lens has positive refractive power
  • the fourth lens has negative refractive power
  • the fifth lens has negative refractive power
  • the sixth lens element has a negative refractive power
  • the seventh lens element has a positive refractive power
  • the eighth lens element has a negative refractive power.
  • the focal length of the overall imaging optical lens 10 is defined as f, and the focal length of the first lens L1 is f1, 3.50 ⁇ f1/f ⁇ 6.50, which can effectively balance the spherical aberration and field curvature of the system.
  • the focal length of the second lens L2 is defined as f2, f2 ⁇ 0; through the reasonable allocation of the optical focal length, the system has better imaging quality and lower sensitivity.
  • the refractive index of the seventh lens L7 is defined as n7, 1.55 ⁇ n7 ⁇ 1.70, and the refractive index of the seventh lens is specified. In this range, it is more conducive to the development of ultra-thinness and at the same time conducive to correcting aberrations.
  • the on-axis thickness of the third lens L3 is d5, and the on-axis distance from the image side surface of the third lens L3 to the object side surface of the fourth lens L4 is d6, which satisfies 1.50 ⁇ d5/d6 ⁇ 4.00, which stipulates the third
  • the ratio of the thickness of the lens to the air gap between the third and the fourth lens helps to compress the total length of the optical system within the range of the conditional formula, and achieves an ultra-thinning effect.
  • the focal length of the fifth lens L5 is f5
  • the focal length of the sixth lens L6 is f6, and the following relationship is satisfied: 3.50 ⁇ f5/f6 ⁇ 6.00.
  • the ratio of the focal length of the fifth and sixth lenses is specified, and the system has better imaging quality and lower sensitivity through the reasonable distribution of optical power.
  • the curvature radius R1 of the object side surface of the first lens L1 and the curvature radius R2 of the image side surface of the first lens L1 satisfy the following relationship: -36.07 ⁇ (R1+R2)/(R1-R2) ⁇ -8.17, within the range of the conditional expression , Reasonably control the shape of the first lens so that the first lens can effectively correct the spherical aberration of the system.
  • it satisfies -22.54 ⁇ (R1+R2)/(R1-R2) ⁇ -10.21.
  • the axial thickness of the first lens L1 is d1
  • the total optical length of the imaging optical lens is TTL, which satisfies the following relationship: 0.02 ⁇ d1/TTL ⁇ 0.10.
  • it is beneficial to realize ultra-thinness Preferably, 0.03 ⁇ d1/TTL ⁇ 0.08 is satisfied.
  • the focal length of the overall imaging optical lens 10 as f
  • the focal length of the second lens L2 as f2
  • the focal length of the second lens L2 as f2
  • the focal length of the second lens L2 is f2
  • -443.09 ⁇ f2/f ⁇ -22.52 by controlling the negative power of the second lens L2 in a reasonable range .
  • It is helpful to correct the aberration of the optical system Preferably, -276.93 ⁇ f2/f ⁇ -28.15 is satisfied.
  • the curvature radius of the object side surface of the second lens L2 is R3, and the curvature radius of the image side surface of the second lens L2 is R4, 18.63 ⁇ (R3+R4)/(R3-R4) ⁇ 141.75, which specifies the second lens L2
  • the shape of the lens is within the range, as the lens develops towards ultra-thin and wide-angle, it is helpful to correct the problem of axial chromatic aberration.
  • it satisfies 29.81 ⁇ (R3+R4)/(R3-R4) ⁇ 113.40.
  • the on-axis thickness of the second lens L2 is d3, which satisfies the following relationship: 0.01 ⁇ d3/TTL ⁇ 0.04, which is beneficial to realize ultra-thinness.
  • 0.02 ⁇ d3/TTL ⁇ 0.03 is satisfied.
  • the focal length of the overall imaging optical lens 10 as f
  • the focal length of the third lens L3 as f3
  • the system has Better imaging quality and lower sensitivity.
  • 0.80 ⁇ f3/f ⁇ 1.27 is satisfied.
  • the curvature radius R5 of the object side surface of the third lens L3 and the curvature radius R6 of the image side surface of the third lens L3 satisfy the following relationship: -0.41 ⁇ (R5+R6)/(R5-R6) ⁇ -0.12, which specifies the third lens
  • the shape of, within the range specified by the conditional formula, can ease the degree of deflection of light passing through the lens and effectively reduce aberrations.
  • -0.25 ⁇ (R5+R6)/(R5-R6) ⁇ -0.15 is satisfied.
  • the on-axis thickness of the third lens L3 is d5, which satisfies the following relationship: 0.05 ⁇ d5/TTL ⁇ 0.15, which is beneficial to realize ultra-thinness.
  • 0.07 ⁇ d5/TTL ⁇ 0.12 is satisfied.
  • the focal length of the overall imaging optical lens 10 as f
  • the focal length of the fourth lens L4 as f4
  • f4 which satisfies the following relationship: -7.30 ⁇ f4/f ⁇ -2.34, which specifies the ratio of the focal length of the fourth lens to the focal length of the system.
  • the range helps to improve the performance of the optical system.
  • -4.56 ⁇ f4/f ⁇ -2.92 is satisfied.
  • the curvature radius R7 of the object side surface of the fourth lens L4 and the curvature radius R8 of the image side surface of the fourth lens L4 satisfy the following relationship: 1.62 ⁇ (R7+R8)/(R7-R8) ⁇ 5.02, which is the fourth lens L4
  • 1.62 ⁇ (R7+R8)/(R7-R8) ⁇ 5.02 which is the fourth lens L4
  • the shape is within the range, with the development of ultra-thin and wide-angle, it is helpful to correct the aberration of the off-axis angle of view.
  • 2.59 ⁇ (R7+R8)/(R7-R8) ⁇ 4.01 is satisfied.
  • the on-axis thickness of the fourth lens L4 is d7, which satisfies the following relationship: 0.01 ⁇ d7/TTL ⁇ 0.05, which is beneficial to realize ultra-thinness.
  • 0.02 ⁇ d7/TTL ⁇ 0.04 is satisfied.
  • the focal length of the overall imaging optical lens 10 as f
  • the focal length of the fifth lens L5 as f5
  • the limitation on the fifth lens L5 can effectively make the imaging lens 10
  • the light angle is gentle, reducing tolerance sensitivity.
  • -17.77 ⁇ f5/f ⁇ -9.62 is satisfied.
  • the curvature radius R9 of the object side surface of the fifth lens L5 and the curvature radius R10 of the image side surface of the fifth lens L5 satisfy the following relationship: 1.86 ⁇ (R9+R10)/(R9-R10) ⁇ 6.84, and the fifth lens L5 is specified
  • the shape is within the range of conditions, with the development of ultra-thin and wide-angle, it is helpful to correct the aberration of the off-axis angle of view.
  • 2.98 ⁇ (R9+R10)/(R9-R10) ⁇ 5.47 is satisfied.
  • the on-axis thickness of the fifth lens L5 is d9, which satisfies the following relationship: 0.02 ⁇ d9/TTL ⁇ 0.05, which is beneficial to realize ultra-thinness.
  • 0.02 ⁇ d9/TTL ⁇ 0.04 is satisfied.
  • the focal length of the overall imaging optical lens 10 as f
  • the focal length of the sixth lens L6 as f6, which satisfies the following relationship: -6.18 ⁇ f6/f ⁇ -1.68.
  • the system has better imaging Quality and low sensitivity.
  • it satisfies -3.86 ⁇ f6/f ⁇ -2.10.
  • the curvature radius of the sixth lens L6 is R11, and the curvature radius of the sixth lens L6 is R12, which satisfies the following relationship: 2.04 ⁇ (R11+R12)/(R11-R12) ⁇ 7.94, which specifies the sixth lens
  • the shape of L6 is within the range, with the development of ultra-thin and wide-angle, it is helpful to correct the aberration of off-axis angle of view.
  • 3.27 ⁇ (R11+R12)/(R11-R12) ⁇ 6.35 is satisfied.
  • the on-axis thickness of the sixth lens L6 is d11, which satisfies the following relationship: 0.03 ⁇ d11/TTL ⁇ 0.08, which is beneficial to realize ultra-thinness.
  • 0.04 ⁇ d11/TTL ⁇ 0.06 is satisfied.
  • the focal length of the overall imaging optical lens 10 as f
  • the focal length of the seventh lens L7 as f7
  • the system has Better imaging quality and lower sensitivity.
  • 0.73 ⁇ f7/f ⁇ 1.17 is satisfied.
  • the curvature radius of the object side surface of the seventh lens L7 is R13
  • the curvature radius of the image side surface of the seventh lens L7 is R14
  • the shape of the seven lens L7 is within the range of conditions, with the development of ultra-thin and wide-angle, it is beneficial to correct the aberration of the off-axis angle of view.
  • it satisfies -2.33 ⁇ (R13+R14)/(R13-R14) ⁇ -1.02.
  • the on-axis thickness of the seventh lens L7 is d13, which satisfies the following relationship: 0.04 ⁇ d13/TTL ⁇ 0.20, which is beneficial to realize ultra-thinness.
  • 0.07 ⁇ d13/TTL ⁇ 0.16 is satisfied.
  • the focal length of the overall imaging optical lens 10 as f
  • the focal length of the eighth lens L8 as f8
  • f8 the focal length of the eighth lens L8
  • -1.51 ⁇ f8/f ⁇ -0.43 the focal length of the eighth lens L8
  • the system has better imaging quality and lower sensitivity.
  • -0.94 ⁇ f8/f ⁇ -0.53 is satisfied.
  • the curvature radius R15 of the object side surface of the eighth lens L8 and the curvature radius R16 of the image side surface of the eighth lens L8 satisfy the following relationship: -0.94 ⁇ (R15+R16)/(R15-R16) ⁇ -0.19, the eighth lens is specified
  • the shape of the lens L8 is within the range of conditions, with the development of ultra-thin and wide-angle, it is beneficial to correct the off-axis angle of view aberration and other problems.
  • it satisfies -0.59 ⁇ (R15+R16)/(R15-R16) ⁇ -0.24.
  • the on-axis thickness of the eighth lens L8 is d15, which satisfies the following relationship: 0.04 ⁇ d15/TTL ⁇ 0.22, which is beneficial to realize ultra-thinness.
  • 0.06 ⁇ d15/TTL ⁇ 0.17 is satisfied.
  • the image height of the overall imaging optical lens 10 is IH, which satisfies the following conditional formula: TTL/IH ⁇ 1.40, thereby facilitating the realization of ultra-thinness.
  • the aperture F number Fno of the imaging optical lens 10 is less than or equal to 2.0. Large aperture, good imaging performance.
  • the imaging optical lens 10 can have good optical performance, and at the same time, it can meet the requirements of large aperture, wide-angle, and ultra-thinness. Design requirements; According to the characteristics of the optical lens 10, the optical lens 10 is particularly suitable for mobile phone camera lens components and WEB camera lenses composed of high-pixel CCD, CMOS and other imaging elements.
  • the imaging optical lens 10 of the present invention will be described below with an example.
  • the symbols described in each example are as follows.
  • the unit of focal length, distance on axis, radius of curvature, thickness on axis, position of inflection point, and position of stagnation point is mm.
  • TTL total optical length (the on-axis distance from the object side of the first lens L1 to the imaging surface), the unit is mm;
  • the object side and/or the image side of the lens can also be provided with inflection points and/or stagnation points to meet high-quality imaging requirements.
  • inflection points and/or stagnation points for specific implementations, refer to the following.
  • Table 1 and Table 2 show design data of the imaging optical lens 10 according to the first embodiment of the present invention.
  • 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 image side surface 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;
  • nd7 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 according to the first embodiment of the present invention.
  • k is the conic coefficient
  • A4, A6, A8, A10, A12, A14, A16, A18, A20 are aspherical coefficients.
  • the aspheric surface of each lens surface uses the aspheric surface shown in the above formula (1).
  • the present invention 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 of the first embodiment of the present invention.
  • 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 corresponding data in 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.
  • P5R2 2 1.285 2.535 P6R1 1 2.165 To P6R2 1 2.155 To P7R1 1 2.295 To P7R2 1 1.975 To P8R1 0 To To P8R2 1 1.865 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 450 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 in Fig. 4 is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction. song.
  • Table 13 shows the values corresponding to the various numerical values in each of Examples 1, 2, and 3 and the parameters specified in the conditional expressions.
  • the first embodiment satisfies various conditional expressions.
  • the entrance pupil diameter of the imaging optical lens is 3.973mm
  • the full-field image height is 8.00mm
  • the diagonal field angle is 90.60°
  • wide-angle wide-angle
  • ultra-thin and its axis and axis
  • the external chromatic aberration is fully corrected and 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 design data of the imaging optical lens 20 according to the second embodiment of the present invention.
  • Table 6 shows aspheric surface data of each lens in the imaging optical lens 20 according to the second embodiment of the present invention.
  • 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 according to the second embodiment of the present invention.
  • 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 450 nm passes through the imaging optical lens 20 of 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 is 3.795mm
  • the full-field image height is 7.30mm
  • the diagonal field angle is 87.60°
  • wide-angle ultra-thin
  • its axis and axis The external chromatic aberration is fully corrected and 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 design data of the imaging optical lens 30 according to the third embodiment of the present invention.
  • Table 10 shows the aspheric surface data of each lens in the imaging optical lens 30 of the third embodiment of the present invention.
  • Table 11 and Table 12 show the inflection point and stagnation point design data of each lens in the imaging optical lens 30 of the third embodiment of the present invention.
  • 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 450 nm pass through the imaging optical lens 30 of the third embodiment.
  • FIG. 12 shows a schematic diagram of field curvature and distortion of light with a wavelength of 546 nm after passing through the imaging optical lens 30 of the third embodiment.
  • the entrance pupil diameter of the imaging optical lens is 4.033mm
  • the full-field image height is 6.80mm
  • the diagonal field angle is 80.00°
  • wide-angle wide-angle
  • ultra-thin and its axis and axis
  • the external chromatic aberration is fully corrected and has excellent optical characteristics.
  • Example 1 Example 2
  • Example 3 f1/f 3.52 6.49 5.11 f2 -268.38 -469.71 -1742.25 n7 1.57 1.57 1.67 f 7.946 7.400 7.864 f1 27.980 48.047 40.199 f3 8.031 7.860 7.911 f4 -28.821 -27.009 -27.547 f5 -112.474 -105.217 -90.739 f6 -20.039 -22.848 -23.231 f7 7.617 6.797 7.694 f8 -5.738 -5.574 -5.029 f12 30.447 52.409 40.448 Fno 2.00 1.95 1.95
  • Fno is the aperture F number of the imaging optical lens.

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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 se rapporte au domaine des lentilles optiques. La lentille optique de caméra (10) comprend successivement, d'un côté objet vers 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). La distance focale de la lentille optique de caméra (10) est f, la distance focale de la première lentille (L1) est f1, la distance focale de la deuxième lentille (L2) est f2, l'indice de réfraction de la septième lentille (L7) est n7, et les relations suivantes sont satisfaites : 3,50 ≤ f1/f ≤ 6,50, f2 ≤ 0 ; et 1,55 ≤ n7 ≤ 1,70. La lentille optique de caméra (10) a de bonnes propriétés optiques telles qu'une grande ouverture, un grand angle, une ultra-minceur.
PCT/CN2019/125233 2019-12-13 2019-12-13 Lentille optique de caméra Ceased WO2021114248A1 (fr)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4057328A (en) * 1974-12-30 1977-11-08 Olympus Optical Co., Ltd. Enlarging lens system
JP4278756B2 (ja) * 1998-07-16 2009-06-17 株式会社ニコン 読取用レンズ
CN103926680A (zh) * 2014-04-08 2014-07-16 中国科学院空间科学与应用研究中心 一种具有像方远心的长焦距光学系统
CN104898259A (zh) * 2015-06-30 2015-09-09 中山联合光电科技股份有限公司 一种具有大孔径大像面的光学镜头
CN107703609A (zh) * 2017-11-22 2018-02-16 浙江舜宇光学有限公司 光学成像镜头
CN108107546A (zh) * 2017-09-29 2018-06-01 玉晶光电(厦门)有限公司 光学成像镜头
CN109541784A (zh) * 2019-01-17 2019-03-29 厦门力鼎光电股份有限公司 一种光学成像镜头

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4057328A (en) * 1974-12-30 1977-11-08 Olympus Optical Co., Ltd. Enlarging lens system
JP4278756B2 (ja) * 1998-07-16 2009-06-17 株式会社ニコン 読取用レンズ
CN103926680A (zh) * 2014-04-08 2014-07-16 中国科学院空间科学与应用研究中心 一种具有像方远心的长焦距光学系统
CN104898259A (zh) * 2015-06-30 2015-09-09 中山联合光电科技股份有限公司 一种具有大孔径大像面的光学镜头
CN108107546A (zh) * 2017-09-29 2018-06-01 玉晶光电(厦门)有限公司 光学成像镜头
CN107703609A (zh) * 2017-11-22 2018-02-16 浙江舜宇光学有限公司 光学成像镜头
CN109541784A (zh) * 2019-01-17 2019-03-29 厦门力鼎光电股份有限公司 一种光学成像镜头

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