WO2021114240A1 - Camera optical lens - Google Patents

Camera optical lens Download PDF

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Publication number
WO2021114240A1
WO2021114240A1 PCT/CN2019/125212 CN2019125212W WO2021114240A1 WO 2021114240 A1 WO2021114240 A1 WO 2021114240A1 CN 2019125212 W CN2019125212 W CN 2019125212W WO 2021114240 A1 WO2021114240 A1 WO 2021114240A1
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Prior art keywords
lens
curvature
imaging optical
radius
ttl
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PCT/CN2019/125212
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French (fr)
Chinese (zh)
Inventor
郭占利
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诚瑞光学(常州)股份有限公司
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Priority to PCT/CN2019/125212 priority Critical patent/WO2021114240A1/en
Publication of WO2021114240A1 publication Critical patent/WO2021114240A1/en

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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, which has good optical performance and meets the design requirements of large aperture, ultra-thin, and wide-angle.
  • an embodiment of the present invention provides an imaging optical lens.
  • the imaging optical lens includes, in order from the object side to the image side, a first lens having a positive refractive power, and a second lens having a negative refractive power.
  • 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 refractive index of the fourth lens is n4
  • the on-axis distance from the image side surface of the sixth lens to the object side surface of the seventh lens is d12
  • the on-axis thickness of the seventh lens is d13
  • the following relationship is satisfied: 0.04 ⁇ d12/d13 ⁇ 0.35.
  • the radius of curvature of the object side surface of the second lens is R3, and the radius of curvature of the image side surface of the second lens is R4, and the following relationship is satisfied: 2.00 ⁇ (R3+R4)/(R3-R4) ⁇ 23.00 .
  • the curvature radius of the object side surface of the first lens is R1
  • the curvature radius 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, and satisfies the following relationship: -7.01 ⁇ (R1+R2)/(R1-R2) ⁇ -1.25; 0.04 ⁇ d1/TTL ⁇ 0.14.
  • the axial thickness of the second lens is d3, and the total optical length of the imaging optical lens is TTL, and the following relationship is satisfied: -190.75 ⁇ f2/f ⁇ -1.88; 0.03 ⁇ d3/TTL ⁇ 0.13.
  • 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: 1.20 ⁇ f3/f ⁇ 6.98; -0.56 ⁇ (R5+R6)/(R5-R6) ⁇ -0.05; 0.03 ⁇ d5/TTL ⁇ 0.12.
  • 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: 0.59 ⁇ f4/f ⁇ 45.57; -1.63 ⁇ (R7+R8)/(R7-R8) ⁇ 9.23; 0.02 ⁇ d7/TTL ⁇ 0.06 .
  • 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: 3.95 ⁇ f5/f ⁇ 85.01; 0.87 ⁇ (R9+R10)/(R9-R10) ⁇ 15.84; 0.01 ⁇ d9/TTL ⁇ 0.07.
  • 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 relational expression: -10.41 ⁇ f6/f ⁇ -2.06; -11.31 ⁇ (R11+R12)/(R11-R12) ⁇ -1.79; 0.02 ⁇ d11/ TTL ⁇ 0.17.
  • 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: 0.57 ⁇ f7/f ⁇ 4.61; -1.72 ⁇ (R13+R14)/(R13-R14) ⁇ -0.21; 0.05 ⁇ d13/TTL ⁇ 0.27.
  • 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: -5.03 ⁇ f8/f ⁇ -0.54; 0.02 ⁇ d15/TTL ⁇ 0.11; 0.53 ⁇ (R15+R16)/(R15-R16) ⁇ 2.10.
  • the imaging optical lens according to the present invention has excellent optical characteristics, and has the characteristics of large aperture, wide-angle, and ultra-thin. It is especially suitable for high-pixel CCD, CMOS and other imaging elements. Mobile phone 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 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 L1 has positive refractive power
  • the second lens L2 has negative refractive power
  • the third lens L3 has positive refractive power
  • the fourth lens L4 has positive refractive power
  • the fifth lens L5 has positive refractive power
  • the sixth lens L6 has With negative refractive power
  • the seventh lens L7 has positive refractive power
  • the eighth lens L8 has 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, 1.92 ⁇ f1/f ⁇ 3.20, which can effectively balance the spherical aberration and field curvature of the system.
  • f the focal length of the first lens L1
  • f1 1.92 ⁇ f1/f ⁇ 3.20
  • the focal length of the second lens L2 is defined as f2, f2 ⁇ 0.00, and the reasonable allocation of the focal length enables the system to have better imaging quality and lower sensitivity.
  • the refractive index of the fourth lens L4 is defined as n4, 1.55 ⁇ n4 ⁇ 1.70, which helps to improve the performance of the optical system within the range of the conditional expression.
  • n4 1.55 ⁇ n4 ⁇ 1.70
  • the imaging optical lens 10 When the focal length of the imaging optical lens 10, the focal length of each lens, and the refractive index of related lenses satisfy the above-mentioned relational expressions, the imaging optical lens 10 can be made to have high performance and meet the design requirements of low TTL.
  • the on-axis distance from the image side surface of the sixth lens L6 to the object side surface of the seventh lens L7 is d12
  • the on-axis thickness of the seventh lens L7 is d13
  • 0.04 ⁇ d12/d13 ⁇ 0.35 in the conditional formula
  • the range helps to compress the total length of the optical system and achieve ultra-thinness.
  • 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, 2.00 ⁇ (R3+R4)/(R3-R4) ⁇ 23.00, which stipulates the second lens
  • the shape within the range specified by the conditional formula, can ease the deflection of light passing through the lens and effectively reduce aberrations. Preferably, it satisfies 2.22 ⁇ (R3+R4)/(R3-R4) ⁇ 22.75.
  • the curvature radius of the object side surface of the first lens L1 is R1
  • the curvature radius of the image side surface of the first lens L1 is R2, -7.01 ⁇ (R1+R2)/(R1-R2) ⁇ -1.25, reasonable control of the first lens L1
  • the shape of the first lens L1 can effectively correct the spherical aberration of the system. Preferably, it satisfies -4.38 ⁇ (R1+R2)/(R1-R2) ⁇ -1.56.
  • the axial thickness of the first lens L1 is d1, and the total optical length of the imaging optical lens is TTL, which satisfies the following relationship: 0.04 ⁇ d1/TTL ⁇ 0.14, which is beneficial to realize ultra-thinness.
  • 0.06 ⁇ d1/TTL ⁇ 0.11 is satisfied.
  • the focal length of the overall imaging optical lens 10 is f
  • the focal length of the second lens L2 is f2 which satisfies the following relationship: -190.75 ⁇ f2/f ⁇ -1.88.
  • the on-axis thickness of the second lens L2 is d3, which satisfies the following relationship: 0.03 ⁇ d3/TTL ⁇ 0.13, which is beneficial to realize ultra-thinness.
  • 0.05 ⁇ d3/TTL ⁇ 0.10 is satisfied.
  • the focal length of the overall imaging optical lens 10 is f
  • the focal length of the third lens L3 is f3
  • the following relationship is satisfied: 1.20 ⁇ f3/f ⁇ 6.98.
  • the system has better imaging quality and lower Sensitivity.
  • 1.92 ⁇ f3/f ⁇ 5.59 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: -0.56 ⁇ (R5+R6)/(R5-R6) ⁇ -0.05, 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.
  • it satisfies -0.35 ⁇ (R5+R6)/(R5-R6) ⁇ -0.07.
  • the on-axis thickness of the third lens L3 is d5, which satisfies the following relationship: 0.03 ⁇ d5/TTL ⁇ 0.12, which is beneficial to realize ultra-thinness.
  • 0.05 ⁇ d5/TTL ⁇ 0.09 is satisfied.
  • the focal length of the overall imaging optical lens 10 is f
  • the focal length of the fourth lens L4 is f4 which satisfies the following relationship: 0.59 ⁇ f4/f ⁇ 45.57.
  • the system has better imaging quality and lower Sensitivity.
  • 0.94 ⁇ f4/f ⁇ 36.46 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: -1.63 ⁇ (R7+R8)/(R7-R8) ⁇ 9.23, the fourth lens is specified
  • -1.02 ⁇ (R7+R8)/(R7-R8) ⁇ 7.38 is satisfied.
  • the on-axis thickness of the fourth lens L4 is d7, which satisfies the following relationship: 0.02 ⁇ d7/TTL ⁇ 0.06, which is beneficial to realize ultra-thinness.
  • 0.03 ⁇ d7/TTL ⁇ 0.05 is satisfied.
  • the focal length of the overall imaging optical lens 10 is f
  • the focal length of the fifth lens L5 is f5
  • the following relationship is satisfied: 3.95 ⁇ f5/f ⁇ 85.01.
  • the limitation on the fifth lens L5 can effectively make the light angle of the imaging lens smooth and reduce Tolerance sensitivity.
  • 6.32 ⁇ f5/f ⁇ 68.01 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: 0.87 ⁇ (R9+R10)/(R9-R10) ⁇ 15.84, 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.
  • 1.40 ⁇ (R9+R10)/(R9-R10) ⁇ 12.68 is satisfied.
  • the on-axis thickness of the fifth lens L5 is d9, which satisfies the following relationship: 0.01 ⁇ d9/TTL ⁇ 0.07, which is beneficial to realize ultra-thinness.
  • 0.02 ⁇ d9/TTL ⁇ 0.06 is satisfied.
  • the focal length of the overall imaging optical lens 10 is f
  • the focal length of the sixth lens L6 is f6, which satisfies the following relationship: -0.41 ⁇ f6/f ⁇ -2.06.
  • the system has better imaging quality and comparison.
  • Low sensitivity Preferably, -6.51 ⁇ f6/f ⁇ -2.58 is satisfied.
  • the curvature radius of the object side surface of the sixth lens L6 is R11
  • the curvature radius of the image side surface of the sixth lens L6 is R12, -11.31 ⁇ (R11+R12)/(R11-R12) ⁇ -1.79, which defines the shape of the sixth lens L6
  • it is helpful to correct the aberration of the off-axis angle of view Preferably, -7.07 ⁇ (R11+R12)/(R11-R12) ⁇ -2.24 is satisfied.
  • the on-axis thickness of the sixth lens L6 is d11, which satisfies the following relationship: 0.02 ⁇ d11/TTL ⁇ 0.17, which is beneficial to realize ultra-thinness.
  • 0.03 ⁇ d11/TTL ⁇ 0.14 is satisfied.
  • the focal length of the overall imaging optical lens 10 is f
  • the focal length of the seventh lens L7 is f7, which satisfies the following relationship: 0.57 ⁇ f7/f ⁇ 4.61.
  • the system has better imaging quality and lower Sensitivity.
  • 0.92 ⁇ f7/f ⁇ 3.69 is satisfied.
  • the curvature radius of the object side surface of the seventh lens is R13, and the curvature radius of the image side surface of the seventh lens is R14, which satisfies the following relationship: -1.72 ⁇ (R13+R14)/(R13-R14) ⁇ -0.21, which is specified This is the shape of the seventh lens L7.
  • -1.72 ⁇ (R13+R14)/(R13-R14) ⁇ -0.21 which is specified
  • This is the shape of the seventh lens L7.
  • it satisfies -1.08 ⁇ (R13+R14)/(R13-R14) ⁇ -0.26.
  • the on-axis thickness of the seventh lens L7 is d13, which satisfies the following relationship: 0.05 ⁇ d13/TTL ⁇ 0.27, which is beneficial to realize ultra-thinness.
  • 0.09 ⁇ d13/TTL ⁇ 0.22 is satisfied.
  • the focal length of the overall imaging optical lens 10 is f
  • the focal length of the eighth lens L8 is f8, which satisfies the following relationship: -5.03 ⁇ f8/f ⁇ -0.54.
  • the reasonable distribution of optical power makes the system have better imaging quality and comparison Low sensitivity.
  • it satisfies -3.14 ⁇ f8/f ⁇ -0.67.
  • 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: 0.53 ⁇ (R15+R16)/(R15-R16) ⁇ 2.10, the eighth lens L8 is specified
  • the shape 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.
  • 0.85 ⁇ (R15+R16)/(R15-R16) ⁇ 1.68 is satisfied.
  • the on-axis thickness of the eighth lens L8 is d15, which satisfies the following relationship: 0.02 ⁇ d15/TTL ⁇ 0.11, which is beneficial to realize ultra-thinness.
  • 0.04 ⁇ d15/TTL ⁇ 0.09 is satisfied.
  • the image height of the overall imaging optical lens 10 is IH, which satisfies the following conditional formula: TTL/IH ⁇ 1.92, thereby achieving ultra-thinness.
  • the focal number of the overall imaging optical lens 10 is Fno, and the following conditional formula is satisfied: FNO ⁇ 1.91, thereby realizing a large aperture.
  • 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.
  • Such a design can make the total optical length TTL of the overall imaging optical lens 10 as short as possible, and maintain the characteristics of miniaturization.
  • 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 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, and A16 are the aspheric 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.
  • 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 436 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 1.659mm
  • the full-field image height is 2.90mm
  • the diagonal field angle is 84.40°
  • wide-angle ultra-thin
  • 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 436 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 0.753mm
  • the full-field image height is 2.90mm
  • the diagonal field angle is 64.52°
  • wide-angle, ultra-thin and 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 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 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 436 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 1.102mm
  • the full-field image height is 2.90mm
  • the diagonal field angle is 60.00°
  • wide-angle ultra-thin
  • its axis and axis The external chromatic aberration is fully corrected and has excellent optical characteristics.
  • Example 1 Example 2
  • Example 3 f1/f 1.94 2.99 3.19 f2 -180.93 -4.02 -199.81 n4 1.57 1.67 1.67 f 3.152 1.430 2.095 f1 6.116 4.271 6.692 f3 7.575 6.659 8.295 f4 95.757 1.685 2.939 f5 24.898 81.046 95.908 f6 -11.687 -7.445 -6.486 f7 3.614 3.914 6.442 f8 -2.548 -3.597 -3.766 f12 5.850 27.870 6.181 Fno 1.900 1.899 1.901

Abstract

A camera optical lens (10, 20, 30), relating to the field of optical lenses and sequentially comprising, from an object side to an image side, a first lens (L1) having a positive refractive power, a second lens (L2) having a negative refractive power, a third lens (L3) having a positive refractive power, a fourth lens (L4) having a positive refractive power, a fifth lens (L5) having a positive refractive power, a sixth lens (L6) having a negative refractive power, a seventh lens (L7) having a positive refractive power, and an eighth lens (L8) having a negative refractive power, wherein the camera optical lens (10, 20, 30) has a focal length of f; the first lens (L1) has a focal length of f1; the second lens (L2) has a focal length of f2; the fourth lens (L4) has a refractive index of n4, which satisfy the following relations: 1.92≤f1/f≤3.20; f2≤0.00; 1.55 ≤n4≤1.70. The camera optical lens (10, 20, 30) satisfies the design requirements of a large-aperture, being wide-angled, and ultra-thin while having a good optical performance.

Description

摄像光学镜头Camera optical lens 技术领域Technical field
本发明涉及光学镜头领域，特别涉及一种适用于智能手机、数码相机等手提终端设备，以及监视器、PC镜头等摄像装置的摄像光学镜头。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.
背景技术Background technique
近年来，随着智能手机的兴起，小型化摄影镜头的需求日渐提高，而一般摄影镜头的感光器件不外乎是感光耦合器件(Charge Coupled Device，CCD)或互补性氧化金属半导体器件(Complementary Metal-OxideSemicondctor Sensor，CMOS Sensor)两种，且由于半导体制造工艺技术的精进，使得感光器件的像素尺寸缩小，再加上现今电子产品以功能佳且轻薄短小的外型为发展趋势，因此，具备良好成像品质的小型化摄像镜头俨然成为目前市场上的主流。In recent years, with the rise of smart phones, the demand for miniaturized photographic lenses has increased. The photosensitive devices of general photographic lenses are nothing more than photosensitive coupled devices (CCD) or complementary metal oxide semiconductor devices (Complementary Metal). -OxideSemicondctor Sensor, CMOS Sensor), and due to the advancement of semiconductor manufacturing technology, the pixel size of photosensitive devices has been reduced, and nowadays electronic products are developed with good functions, light, thin and short appearance, so they have good The miniaturized camera lens with image quality has become the mainstream in the current market.
为获得较佳的成像品质，传统搭载于手机相机的镜头多采用三片式、四片式甚至是五片式、六片式透镜结构。然而，随着技术的发展以及用户多样化需求的增多，在感光器件的像素面积不断缩小，且系统对成像品质的要求不断提高的情况下，八片式透镜结构逐渐出现在镜头设计当中，常见的八片式透镜虽然已经具有较好的光学性能，但是其光焦度、透镜间距和透镜形状设置仍然具有一定的不合理性，导致透镜结构在具有良好光学性能的同时，无法满足大光圈、超薄化、广角化的设计要求。In order to obtain better imaging quality, the lenses traditionally mounted on mobile phone cameras often adopt three-element, four-element, or even five-element or six-element lens structures. However, with the development of technology and the increase in the diversified needs of users, 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.
发明内容Summary of the invention
针对上述问题，本发明的目的在于提供一种摄像光学镜头，其具有良好光学性能的同时，满足大光圈、超薄化、广角化的设计要求。In view of the above-mentioned problems, the object of the present invention is to provide an imaging optical lens, which has good optical performance and meets the design requirements of large aperture, ultra-thin, and wide-angle.
为解决上述技术问题，本发明的实施方式提供了一种摄像光学镜头，所述摄像光学镜头，自物侧至像侧依序包含：具有正屈折力的第一透镜，具有负屈折力的第二透镜，具有正屈折力的第三透镜，具有正屈折力的第四透镜，具有正屈折力的第五透镜，具有负屈折力的第六透镜，具有正屈折力的第七透镜，以及具有负屈折力的第八透镜；所述摄像光学镜头的焦距为f，所述第一透镜的焦距为f1，所述第二透镜的焦距为f2，所述第四透镜的折射率为n4，且满足下列关系式： 1.92≤f1/f≤3.20；f2≤0.00；1.55≤n4≤1.70。In order to solve the above technical problems, an embodiment of the present invention provides an imaging optical lens. The imaging optical lens includes, in order from the object side to the image side, a first lens having a positive refractive power, and a second lens having a negative refractive power. Two lenses, a third lens with positive refractive power, a fourth lens with positive refractive power, a fifth lens with positive refractive power, a sixth lens with negative refractive power, a seventh lens with positive refractive power, and The eighth lens with negative refractive power; 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 refractive index of the fourth lens is n4, and Satisfy the following relationship: 1.92≤f1/f≤3.20; f2≤0.00; 1.55≤n4≤1.70.
优选地，所述第六透镜的像侧面到所述第七透镜的物侧面的轴上距离为d12，所述第七透镜的轴上厚度为d13，且满足下列关系式：0.04≤d12/d13≤0.35。Preferably, the on-axis distance from the image side surface of the sixth lens to the object side surface of the seventh lens is d12, the on-axis thickness of the seventh lens is d13, and the following relationship is satisfied: 0.04≤d12/d13 ≤0.35.
优选地，所述第二透镜物侧面的曲率半径为R3，所述第二透镜像侧面的曲率半径为R4，且满足下列关系式：2.00≤(R3+R4)/(R3-R4)≤23.00。Preferably, the radius of curvature of the object side surface of the second lens is R3, and the radius of curvature of the image side surface of the second lens is R4, and the following relationship is satisfied: 2.00≤(R3+R4)/(R3-R4)≤23.00 .
优选地，所述第一透镜物侧面的曲率半径为R1，所述第一透镜像侧面的曲率半径为R2，所述第一透镜的轴上厚度为d1，所述摄像光学镜头的光学总长为TTL，且满足下列关系式：-7.01≤(R1+R2)/(R1-R2)≤-1.25；0.04≤d1/TTL≤0.14。Preferably, the curvature radius of the object side surface of the first lens is R1, the curvature radius of the image side surface of the first lens is R2, the axial thickness of the first lens is d1, and the total optical length of the imaging optical lens is TTL, and satisfies the following relationship: -7.01≤(R1+R2)/(R1-R2)≤-1.25; 0.04≤d1/TTL≤0.14.
优选地，所述第二透镜的轴上厚度为d3，所述摄像光学镜头的光学总长为TTL，且满足下列关系式：-190.75≤f2/f≤-1.88；0.03≤d3/TTL≤0.13。Preferably, the axial thickness of the second lens is d3, and the total optical length of the imaging optical lens is TTL, and the following relationship is satisfied: -190.75≤f2/f≤-1.88; 0.03≤d3/TTL≤0.13.
优选地，所述第三透镜的焦距为f3，所述第三透镜物侧面的曲率半径为R5，所述第三透镜像侧面的曲率半径为R6，所述第三透镜的轴上厚度为d5，所述摄像光学镜头的光学总长为TTL，且满足下列关系式：1.20≤f3/f≤6.98；-0.56≤(R5+R6)/(R5-R6)≤-0.05；0.03≤d5/TTL≤0.12。Preferably, 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: 1.20≤f3/f≤6.98; -0.56≤(R5+R6)/(R5-R6)≤-0.05; 0.03≤d5/TTL≤ 0.12.
优选地，所述第四透镜的焦距为f4，所述第四透镜物侧面的曲率半径为R7，所述第四透镜像侧面的曲率半径为R8，所述第四透镜的轴上厚度为d7，所述摄像光学镜头的光学总长为TTL，且满足下列关系式：0.59≤f4/f≤45.57；-1.63≤(R7+R8)/(R7-R8)≤9.23；0.02≤d7/TTL≤0.06。Preferably, 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: 0.59≤f4/f≤45.57; -1.63≤(R7+R8)/(R7-R8)≤9.23; 0.02≤d7/TTL≤0.06 .
优选地，所述第五透镜的焦距为f5，所述第五透镜物侧面的曲率半径为R9，所述第五透镜像侧面的曲率半径为R10，所述第五透镜的轴上厚度为d9，所述摄像光学镜头的光学总长为TTL，且满足下列关系式：3.95≤f5/f≤85.01；0.87≤(R9+R10)/(R9-R10)≤15.84；0.01≤d9/TTL≤0.07。Preferably, 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 d9 , The total optical length of the camera optical lens is TTL, and satisfies the following relationship: 3.95≤f5/f≤85.01; 0.87≤(R9+R10)/(R9-R10)≤15.84; 0.01≤d9/TTL≤0.07.
优选地，所述第六透镜的焦距为f6，所述第六透镜物侧面的曲率半径为R11，所述第六透镜像侧面的曲率半径为R12，所述第六透镜的轴上厚度为d11，所述摄像光学镜头的光学总长为TTL，且满足下列关系式：-10.41≤f6/f≤-2.06；-11.31≤(R11+R12)/(R11-R12)≤-1.79；0.02≤d11/TTL≤0.17。Preferably, 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 relational expression: -10.41≤f6/f≤-2.06; -11.31≤(R11+R12)/(R11-R12)≤-1.79; 0.02≤d11/ TTL≤0.17.
优选地，所述第七透镜的焦距为f7，所述第七透镜物侧面的曲率半径为R13，所述第七透镜像侧面的曲率半径为R14，所述第七透镜的 轴上厚度为d13，所述摄像光学镜头的光学总长为TTL，且满足下列关系式：0.57≤f7/f≤4.61；-1.72≤(R13+R14)/(R13-R14)≤-0.21；0.05≤d13/TTL≤0.27。Preferably, 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, and 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: 0.57≤f7/f≤4.61; -1.72≤(R13+R14)/(R13-R14)≤-0.21; 0.05≤d13/TTL≤ 0.27.
优选地，所述第八透镜的焦距为f8，所述第八透镜物侧面的曲率半径为R15，所述第八透镜像侧面的曲率半径为R16，所述第八透镜的轴上厚度为d15，所述摄像光学镜头的光学总长为TTL，且满足下列关系式：-5.03≤f8/f≤-0.54；0.02≤d15/TTL≤0.11；0.53≤(R15+R16)/(R15-R16)≤2.10。Preferably, 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: -5.03≤f8/f≤-0.54; 0.02≤d15/TTL≤0.11; 0.53≤(R15+R16)/(R15-R16)≤ 2.10.
本发明的有益效果在于：根据本发明的摄像光学镜头具有优秀的光学特性，且具有大光圈、广角化、超薄化的特性，尤其适用于由高像素用的CCD、CMOS等摄像元件构成的手机摄像镜头组件和WEB摄像镜头。The beneficial effects of the present invention are: the imaging optical lens according to the present invention has excellent optical characteristics, and has the characteristics of large aperture, wide-angle, and ultra-thin. It is especially suitable for high-pixel CCD, CMOS and other imaging elements. Mobile phone camera lens assembly and WEB camera lens.
附图说明Description of the drawings
为了更清楚地说明本发明实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其它的附图，其中：In order to explain the technical solutions in the embodiments of the present invention more clearly, the following will briefly introduce the drawings needed in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative work, other drawings can be obtained based on these drawings, among which:
图1是本发明第一实施方式的摄像光学镜头的结构示意图；FIG. 1 is a schematic diagram of the structure of an imaging optical lens according to a first embodiment of the present invention;
图2是图1所示摄像光学镜头的轴向像差示意图；FIG. 2 is a schematic diagram of axial aberration of the imaging optical lens shown in FIG. 1;
图3是图1所示摄像光学镜头的倍率色差示意图；3 is a schematic diagram of the chromatic aberration of magnification of the imaging optical lens shown in FIG. 1;
图4是图1所示摄像光学镜头的场曲及畸变示意图；4 is a schematic diagram of field curvature and distortion of the imaging optical lens shown in FIG. 1;
图5是本发明第二实施方式的摄像光学镜头的结构示意图；5 is a schematic diagram of the structure of an imaging optical lens according to a second embodiment of the present invention;
图6是图5所示摄像光学镜头的轴向像差示意图；FIG. 6 is a schematic diagram of axial aberration of the imaging optical lens shown in FIG. 5;
图7是图5所示摄像光学镜头的倍率色差示意图；FIG. 7 is a schematic diagram of the chromatic aberration of magnification of the imaging optical lens shown in FIG. 5;
图8是图5所示摄像光学镜头的场曲及畸变示意图；FIG. 8 is a schematic diagram of field curvature and distortion of the imaging optical lens shown in FIG. 5;
图9是本发明第三实施方式的摄像光学镜头的结构示意图；9 is a schematic diagram of the structure of an imaging optical lens according to a third embodiment of the present invention;
图10是图9所示摄像光学镜头的轴向像差示意图；10 is a schematic diagram of axial aberration of the imaging optical lens shown in FIG. 9;
图11是图9所示摄像光学镜头的倍率色差示意图；11 is a schematic diagram of the chromatic aberration of magnification of the imaging optical lens shown in FIG. 9;
图12是图9所示摄像光学镜头的场曲及畸变示意图。FIG. 12 is a schematic diagram of field curvature and distortion of the imaging optical lens shown in FIG. 9.
具体实施方式Detailed ways
为使本发明的目的、技术方案和优点更加清楚，下面将结合附图对本发明的各实施方式进行详细的阐述。然而，本领域的普通技术人员可以理解，在本发明各实施方式中，为了使读者更好地理解本发明而提出了许多技术细节。但是，即使没有这些技术细节和基于以下各实施方式的种种变化和修改，也可以实现本发明所要求保护的技术方案。In order to make the objectives, technical solutions and advantages of the present invention clearer, the various embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, a person of ordinary skill in the art can understand that, in each embodiment of the present invention, many technical details are proposed for the reader to better understand the present invention. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solution claimed by the present invention can be realized.
(第一实施方式)(First embodiment)
参考附图，本发明提供了一种摄像光学镜头10。图1所示为本发明第一实施方式的摄像光学镜头10，该摄像光学镜头10包括八个透镜。具体的，所述摄像光学镜头10，由物侧至像侧依序包括：光圈S1、第一透镜L1、第二透镜L2、第三透镜L3、第四透镜L4、第五透镜L5、第六透镜L6、第七透镜L7以及第八透镜L8。第八透镜L8和像面Si之间可设置有光学过滤片(filter)GF等光学元件。With reference to the drawings, the present invention provides an imaging optical lens 10. 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.
第一透镜L1具有正屈折力，第二透镜L2具有负屈折力，第三透镜L3具有正屈折力，第四透镜L4具有正屈折力，第五透镜L5具有正屈折力，第六透镜L6具有负屈折力，第七透镜L7具有正屈折力，以及第八透镜L8具有负屈折力。The first lens L1 has positive refractive power, the second lens L2 has negative refractive power, the third lens L3 has positive refractive power, the fourth lens L4 has positive refractive power, the fifth lens L5 has positive refractive power, and the sixth lens L6 has With negative refractive power, the seventh lens L7 has positive refractive power, and the eighth lens L8 has negative refractive power.
定义整体摄像光学镜头10的焦距为f，所述第一透镜L1的焦距为f1，1.92≤f1/f≤3.20，可以有效地平衡系统的球差以及场曲量。优选地，1.93≤f1/f≤3.197。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, 1.92≤f1/f≤3.20, which can effectively balance the spherical aberration and field curvature of the system. Preferably, 1.93≤f1/f≤3.197.
定义所述第二透镜L2的焦距为f2，f2≤0.00，通过焦距的合理分配，使得系统具有较佳的成像品质和较低的敏感性。优选地，f2≤-2.01。The focal length of the second lens L2 is defined as f2, f2≤0.00, and the reasonable allocation of the focal length enables the system to have better imaging quality and lower sensitivity. Preferably, f2≤-2.01.
定义所述第四透镜L4的折射率为n4，1.55≤n4≤1.70，在条件式范围内有助于提高光学系统性能。优选地，1.56≤n4≤1.69。The refractive index of the fourth lens L4 is defined as n4, 1.55≦n4≦1.70, which helps to improve the performance of the optical system within the range of the conditional expression. Preferably, 1.56≤n4≤1.69.
当本发明所述摄像光学镜头10的焦距、各透镜的焦距、相关透镜的折射率满足上述关系式时，可以使摄像光学镜头10具有高性能，且满足低TTL的设计需求。When the focal length of the imaging optical lens 10, the focal length of each lens, and the refractive index of related lenses satisfy the above-mentioned relational expressions, the imaging optical lens 10 can be made to have high performance and meet the design requirements of low TTL.
所述第六透镜L6的像侧面到所述第七透镜L7的物侧面的轴上距离为d12，所述第七透镜L7的轴上厚度为d13，0.04≤d12/d13≤0.35，在条件式范围内有助于压缩光学系统总长，实现超薄化效果。优选的，0.04≤d12/d13≤0.33。The on-axis distance from the image side surface of the sixth lens L6 to the object side surface of the seventh lens L7 is d12, the on-axis thickness of the seventh lens L7 is d13, 0.04≤d12/d13≤0.35, in the conditional formula The range helps to compress the total length of the optical system and achieve ultra-thinness. Preferably, 0.04≤d12/d13≤0.33.
所述第二透镜L2物侧面的曲率半径为R3，所述第二透镜L2像侧面的曲率半径为R4，2.00≤(R3+R4)/(R3-R4)≤23.00，规定了第二透镜 的形状，在条件式规定范围内，可以缓和光线经过镜片的偏折程度，有效减小像差。优选地，满足2.22≤(R3+R4)/(R3-R4)≤22.75。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, 2.00≤(R3+R4)/(R3-R4)≤23.00, which stipulates the second lens The shape, within the range specified by the conditional formula, can ease the deflection of light passing through the lens and effectively reduce aberrations. Preferably, it satisfies 2.22≤(R3+R4)/(R3-R4)≤22.75.
第一透镜L1物侧面的曲率半径为R1，所述第一透镜L1像侧面的曲率半径为R2，-7.01≤(R1+R2)/(R1-R2)≤-1.25，合理控制第一透镜L1的形状，使得第一透镜L1能够有效地校正系统球差。优选地，满足-4.38≤(R1+R2)/(R1-R2)≤-1.56。The curvature radius of the object side surface of the first lens L1 is R1, and the curvature radius of the image side surface of the first lens L1 is R2, -7.01≤(R1+R2)/(R1-R2)≤-1.25, reasonable control of the first lens L1 The shape of the first lens L1 can effectively correct the spherical aberration of the system. Preferably, it satisfies -4.38≤(R1+R2)/(R1-R2)≤-1.56.
第一透镜L1的轴上厚度为d1，摄像光学镜头的光学总长为TTL，满足下列关系式：0.04≤d1/TTL≤0.14，有利于实现超薄化。优选地，满足0.06≤d1/TTL≤0.11。The axial thickness of the first lens L1 is d1, and the total optical length of the imaging optical lens is TTL, which satisfies the following relationship: 0.04≤d1/TTL≤0.14, which is beneficial to realize ultra-thinness. Preferably, 0.06≤d1/TTL≤0.11 is satisfied.
整体摄像光学镜头10的焦距为f，第二透镜L2焦距f2，满足下列关系式：-190.75≤f2/f≤-1.88，通过将第二透镜L2的负光焦度控制在合理范围，有利于矫正光学系统的像差。优选地，满足-119.22≤f2/f≤-2.34。The focal length of the overall imaging optical lens 10 is f, and the focal length of the second lens L2 is f2, which satisfies the following relationship: -190.75≤f2/f≤-1.88. By controlling the negative refractive power of the second lens L2 in a reasonable range, it is beneficial to Correct the aberration of the optical system. Preferably, -119.22≤f2/f≤-2.34 is satisfied.
第二透镜L2的轴上厚度为d3，满足下列关系式：0.03≤d3/TTL≤0.13，有利于实现超薄化。优选地，满足0.05≤d3/TTL≤0.10。The on-axis thickness of the second lens L2 is d3, which satisfies the following relationship: 0.03≤d3/TTL≤0.13, which is beneficial to realize ultra-thinness. Preferably, 0.05≤d3/TTL≤0.10 is satisfied.
整体摄像光学镜头10的焦距为f，第三透镜L3焦距f3，以及满足下列关系式：1.20≤f3/f≤6.98，通过光焦度的合理分配，使得系统具有较佳的成像品质和较低的敏感性。优选地，满足1.92≤f3/f≤5.59。The focal length of the overall imaging optical lens 10 is f, the focal length of the third lens L3 is f3, and the following relationship is satisfied: 1.20≤f3/f≤6.98. Through the reasonable distribution of optical power, the system has better imaging quality and lower Sensitivity. Preferably, 1.92≤f3/f≤5.59 is satisfied.
第三透镜L3物侧面的曲率半径R5，第三透镜L3像侧面的曲率半径R6，满足下列关系式：-0.56≤(R5+R6)/(R5-R6)≤-0.05，规定了第三透镜的形状，在条件式规定范围内，可以缓和光线经过镜片的偏折程度，有效减小像差。优选地，满足-0.35≤(R5+R6)/(R5-R6)≤-0.07。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: -0.56≤(R5+R6)/(R5-R6)≤-0.05, 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. Preferably, it satisfies -0.35≤(R5+R6)/(R5-R6)≤-0.07.
第三透镜L3的轴上厚度为d5，满足下列关系式：0.03≤d5/TTL≤0.12，有利于实现超薄化。优选地，满足0.05≤d5/TTL≤0.09。The on-axis thickness of the third lens L3 is d5, which satisfies the following relationship: 0.03≤d5/TTL≤0.12, which is beneficial to realize ultra-thinness. Preferably, 0.05≤d5/TTL≤0.09 is satisfied.
整体摄像光学镜头10的焦距为f，第四透镜L4焦距f4，满足下列关系式：0.59≤f4/f≤45.57，通过光焦度的合理分配，使得系统具有较佳的成像品质和较低的敏感性。优选地，满足0.94≤f4/f≤36.46。The focal length of the overall imaging optical lens 10 is f, and the focal length of the fourth lens L4 is f4, which satisfies the following relationship: 0.59≤f4/f≤45.57. Through the reasonable distribution of optical power, the system has better imaging quality and lower Sensitivity. Preferably, 0.94≤f4/f≤36.46 is satisfied.
第四透镜L4物侧面的曲率半径R7，第四透镜L4像侧面的曲率半径R8，满足下列关系式：-1.63≤(R7+R8)/(R7-R8)≤9.23，规定的是第四透镜L4的形状，在范围内时，随着超薄广角化的发展，有利于补正轴外画角的像差等问题。优选地，满足-1.02≤(R7+R8)/(R7-R8)≤7.38。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: -1.63≤(R7+R8)/(R7-R8)≤9.23, the fourth lens is specified When the shape of L4 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. Preferably, -1.02≤(R7+R8)/(R7-R8)≤7.38 is satisfied.
第四透镜L4的轴上厚度为d7，满足下列关系式：0.02≤d7/TTL≤0.06，有利于实现超薄化。优选地，满足0.03≤d7/TTL≤0.05。The on-axis thickness of the fourth lens L4 is d7, which satisfies the following relationship: 0.02≤d7/TTL≤0.06, which is beneficial to realize ultra-thinness. Preferably, 0.03≤d7/TTL≤0.05 is satisfied.
整体摄像光学镜头10的焦距为f，第五透镜L5焦距f5，以及满足 下列关系式：3.95≤f5/f≤85.01，对第五透镜L5的限定可有效的使得摄像镜头的光线角度平缓，降低公差敏感度。优选地，满足6.32≤f5/f≤68.01。The focal length of the overall imaging optical lens 10 is f, the focal length of the fifth lens L5 is f5, and the following relationship is satisfied: 3.95≤f5/f≤85.01. The limitation on the fifth lens L5 can effectively make the light angle of the imaging lens smooth and reduce Tolerance sensitivity. Preferably, 6.32≤f5/f≤68.01 is satisfied.
第五透镜L5物侧面的曲率半径R9，第五透镜L5像侧面的曲率半径R10，满足下列关系式：0.87≤(R9+R10)/(R9-R10)≤15.84，规定的是第五透镜L5的形状，在条件范围内时，随着超薄广角化发展，有利于补正轴外画角的像差等问题。优选地，满足1.40≤(R9+R10)/(R9-R10)≤12.68。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: 0.87≤(R9+R10)/(R9-R10)≤15.84, and the fifth lens L5 is specified When 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. Preferably, 1.40≤(R9+R10)/(R9-R10)≤12.68 is satisfied.
第五透镜L5的轴上厚度为d9，满足下列关系式：0.01≤d9/TTL≤0.07，有利于实现超薄化。优选地，满足0.02≤d9/TTL≤0.06。The on-axis thickness of the fifth lens L5 is d9, which satisfies the following relationship: 0.01≤d9/TTL≤0.07, which is beneficial to realize ultra-thinness. Preferably, 0.02≤d9/TTL≤0.06 is satisfied.
整体摄像光学镜头10的焦距为f，第六透镜L6焦距f6，满足下列关系式：-10.41≤f6/f≤-2.06，通过光焦度的合理分配，使得系统具有较佳的成像品质和较低的敏感性。优选地，满足-6.51≤f6/f≤-2.58。The focal length of the overall imaging optical lens 10 is f, and the focal length of the sixth lens L6 is f6, which satisfies the following relationship: -0.41≤f6/f≤-2.06. Through the reasonable distribution of optical power, the system has better imaging quality and comparison. Low sensitivity. Preferably, -6.51≤f6/f≤-2.58 is satisfied.
第六透镜L6物侧面的曲率半径为R11，第六透镜L6像侧面的曲率半径为R12，-11.31≤(R11+R12)/(R11-R12)≤-1.79，规定了第六透镜L6的形状，在范围内时，随着超薄广角化发展，有利于补正轴外画角的像差等问题。优选地，满足-7.07≤(R11+R12)/(R11-R12)≤-2.24。The curvature radius of the object side surface of the sixth lens L6 is R11, and the curvature radius of the image side surface of the sixth lens L6 is R12, -11.31≤(R11+R12)/(R11-R12)≤-1.79, which defines the shape of the sixth lens L6 When in 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. Preferably, -7.07≤(R11+R12)/(R11-R12)≤-2.24 is satisfied.
第六透镜L6的轴上厚度为d11，满足下列关系式：0.02≤d11/TTL≤0.17，有利于实现超薄化。优选地，满足0.03≤d11/TTL≤0.14。The on-axis thickness of the sixth lens L6 is d11, which satisfies the following relationship: 0.02≤d11/TTL≤0.17, which is beneficial to realize ultra-thinness. Preferably, 0.03≤d11/TTL≤0.14 is satisfied.
整体摄像光学镜头10的焦距为f，第七透镜L7焦距f7，满足下列关系式：0.57≤f7/f≤4.61，通过光焦度的合理分配，使得系统具有较佳的成像品质和较低的敏感性。优选地，满足0.92≤f7/f≤3.69。The focal length of the overall imaging optical lens 10 is f, and the focal length of the seventh lens L7 is f7, which satisfies the following relationship: 0.57≤f7/f≤4.61. Through the reasonable distribution of optical power, the system has better imaging quality and lower Sensitivity. Preferably, 0.92≤f7/f≤3.69 is satisfied.
所述第七透镜物侧面的曲率半径为R13，所述第七透镜像侧面的曲率半径为R14，满足下列关系式：-1.72≤(R13+R14)/(R13-R14)≤-0.21，规定的是第七透镜L7的形状，在条件范围内时，随着超薄广角化发展，有利于补正轴外画角的像差等问题。优选地，满足-1.08≤(R13+R14)/(R13-R14)≤-0.26.The curvature radius of the object side surface of the seventh lens is R13, and the curvature radius of the image side surface of the seventh lens is R14, which satisfies the following relationship: -1.72≤(R13+R14)/(R13-R14)≤-0.21, which is specified This is the shape of the seventh lens L7. When the conditions are 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 -1.08≤(R13+R14)/(R13-R14)≤-0.26.
第七透镜L7的轴上厚度为d13，满足下列关系式：0.05≤d13/TTL≤0.27，有利于实现超薄化。优选地，满足0.09≤d13/TTL≤0.22。The on-axis thickness of the seventh lens L7 is d13, which satisfies the following relationship: 0.05≤d13/TTL≤0.27, which is beneficial to realize ultra-thinness. Preferably, 0.09≤d13/TTL≤0.22 is satisfied.
整体摄像光学镜头10的焦距为f，第八透镜L8焦距f8，满足下列关系式：-5.03≤f8/f≤-0.54，通过光焦度的合理分配，使得系统具有较佳的成像品质和较低的敏感性。优选地，满足-3.14≤f8/f≤-0.67。The focal length of the overall imaging optical lens 10 is f, and the focal length of the eighth lens L8 is f8, which satisfies the following relationship: -5.03≤f8/f≤-0.54. The reasonable distribution of optical power makes the system have better imaging quality and comparison Low sensitivity. Preferably, it satisfies -3.14≤f8/f≤-0.67.
第八透镜L8物侧面的曲率半径R15，第八透镜L8像侧面的曲率半径R16，满足下列关系式：0.53≤(R15+R16)/(R15-R16)≤2.10，规定的是第八透镜L8的形状，在条件范围内时，随着超薄广角化发展，有利于补正轴外画角的像差等问题。优选地，满足0.85≤ (R15+R16)/(R15-R16)≤1.68。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: 0.53≤(R15+R16)/(R15-R16)≤2.10, the eighth lens L8 is specified When the shape 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. Preferably, 0.85≤(R15+R16)/(R15-R16)≤1.68 is satisfied.
第八透镜L8的轴上厚度为d15，满足下列关系式：0.02≤d15/TTL≤0.11，有利于实现超薄化。优选地，满足0.04≤d15/TTL≤0.09。The on-axis thickness of the eighth lens L8 is d15, which satisfies the following relationship: 0.02≤d15/TTL≤0.11, which is beneficial to realize ultra-thinness. Preferably, 0.04≤d15/TTL≤0.09 is satisfied.
在本实施方式中，整体摄像光学镜头10的像高为IH，满足下列条件式：TTL/IH≤1.92，从而实现超薄化。In this embodiment, the image height of the overall imaging optical lens 10 is IH, which satisfies the following conditional formula: TTL/IH≤1.92, thereby achieving ultra-thinness.
在本实施方式中，整体摄像光学镜头10的焦数为Fno，满足下列条件式：FNO≤1.91，从而实现大光圈。In this embodiment, the focal number of the overall imaging optical lens 10 is Fno, and the following conditional formula is satisfied: FNO≦1.91, thereby realizing a large aperture.
当本发明所述摄像光学镜头10的焦距、各透镜的焦距和曲率半径满足上述关系式时，可以使摄像光学镜头10具有良好光学性能，同时能够满足了大光圈、广角化、超薄化的设计要求；根据该光学镜头10的特性，该光学镜头10尤其适用于由高像素用的CCD、CMOS等摄像元件构成的手机摄像镜头组件和WEB摄像镜头。When the focal length of the imaging optical lens 10, the focal length of each lens, and the radius of curvature of the present invention satisfy the above-mentioned relationship, 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.
如此设计，能够使得整体摄像光学镜头10的光学总长TTL尽量变短，维持小型化的特性。Such a design can make the total optical length TTL of the overall imaging optical lens 10 as short as possible, and maintain the characteristics of miniaturization.
下面将用实例进行说明本发明的摄像光学镜头10。各实例中所记载的符号如下所示。焦距、轴上距离、曲率半径、轴上厚度、反曲点位置、驻点位置的单位为mm。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：光学长度(第1透镜L1的物侧面到成像面的轴上距离)，单位为mm；TTL: optical length (the on-axis distance from the object side of the first lens L1 to the imaging surface), the unit is mm;
优选的，所述透镜的物侧面和/或像侧面上还可以设置有反曲点和/或驻点，以满足高品质的成像需求，具体的可实施方案，参下所述。Preferably, 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. For specific implementations, refer to the following.
表1、表2示出本发明第一实施方式的摄像光学镜头10的设计数据。Table 1 and Table 2 show design data of the imaging optical lens 10 according to the first embodiment of the present invention.
【表1】【Table 1】
Figure PCTCN2019125212-appb-000001
Figure PCTCN2019125212-appb-000001
Figure PCTCN2019125212-appb-000002
Figure PCTCN2019125212-appb-000002
其中，各符号的含义如下。Among them, the meaning of each symbol is as follows.
S1：光圈；S1: aperture;
R：光学面的曲率半径、透镜时为中心曲率半径；R: The radius of curvature of the optical surface, and the radius of curvature of the center of the lens;
R1：第一透镜L1的物侧面的曲率半径；R1: the radius of curvature of the object side surface of the first lens L1;
R2：第一透镜L1的像侧面的曲率半径；R2: the radius of curvature of the image side surface of the first lens L1;
R3：第二透镜L2的物侧面的曲率半径；R3: the radius of curvature of the object side surface of the second lens L2;
R4：第二透镜L2的像侧面的曲率半径；R4: the radius of curvature of the image side surface of the second lens L2;
R5：第三透镜L3的物侧面的曲率半径；R5: the radius of curvature of the object side surface of the third lens L3;
R6：第三透镜L3的像侧面的曲率半径；R6: the radius of curvature of the image side surface of the third lens L3;
R7：第四透镜L4的物侧面的曲率半径；R7: the radius of curvature of the object side of the fourth lens L4;
R8：第四透镜L4的像侧面的曲率半径；R8: the radius of curvature of the image side surface of the fourth lens L4;
R9：第五透镜L5的物侧面的曲率半径；R9: the radius of curvature of the object side surface of the fifth lens L5;
R10：第五透镜L5的像侧面的曲率半径；R10: the radius of curvature of the image side surface of the fifth lens L5;
R11：第六透镜L6的物侧面的曲率半径；R11: the radius of curvature of the object side surface of the sixth lens L6;
R12：第六透镜L6的像侧面的曲率半径；R12: the radius of curvature of the image side surface of the sixth lens L6;
R13：第七透镜L7的物侧面的曲率半径；R13: the radius of curvature of the object side surface of the seventh lens L7;
R14：第七透镜L7的像侧面的曲率半径；R14: the radius of curvature of the image side surface of the seventh lens L7;
R15：第八透镜L8的像侧面的曲率半径；R15: the radius of curvature of the image side surface of the eighth lens L8;
R16：第八透镜L8的像侧面的曲率半径；R16: the radius of curvature of the image side surface of the eighth lens L8;
R17：光学过滤片GF的物侧面的曲率半径；R17: the radius of curvature of the object side of the optical filter GF;
R18：光学过滤片GF的像侧面的曲率半径；R18: the radius of curvature of the image side surface of the optical filter GF;
d：透镜的轴上厚度与透镜之间的轴上距离；d: the on-axis thickness of the lens and the on-axis distance between the lenses;
d0：光圈S1到第一透镜L1的物侧面的轴上距离；d0: the on-axis distance from the aperture S1 to the object side of the first lens L1;
d1：第一透镜L1的轴上厚度；d1: the on-axis thickness of the first lens L1;
d2：第一透镜L1的像侧面到第二透镜L2的物侧面的轴上距离；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;
d3：第二透镜L2的轴上厚度；d3: the on-axis thickness of the second lens L2;
d4：第二透镜L2的像侧面到第三透镜L3的物侧面的轴上距离；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;
d5：第三透镜L3的轴上厚度；d5: the on-axis thickness of the third lens L3;
d6：第三透镜L3的像侧面到第四透镜L4的物侧面的轴上距离；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;
d7：第四透镜L4的轴上厚度；d7: the on-axis thickness of the fourth lens L4;
d8：第四透镜L4的像侧面到第五透镜L5的物侧面的轴上距离；d8: the on-axis distance from the image side surface of the fourth lens L4 to the object side surface of the fifth lens L5;
d9：第五透镜L5的轴上厚度；d9: the on-axis thickness of the fifth lens L5;
d10：第五透镜L5的像侧面到第六透镜L6的物侧面的轴上距离；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：第六透镜L6的轴上厚度；d11: the on-axis thickness of the sixth lens L6;
d12：第六透镜L6的像侧面到第七透镜L7的物侧面的轴上距离；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;
d13：第七透镜L7的轴上厚度；d13: the on-axis thickness of the seventh lens L7;
d14：第七透镜L7的像侧面到第八透镜L8的物侧面的轴上距离；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;
d15：第八透镜L8的轴上厚度；d15: the on-axis thickness of the eighth lens L8;
d16：第八透镜L8的像侧面到光学过滤片GF的物侧面的轴上距离；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：光学过滤片GF的轴上厚度；d17: the axial thickness of the optical filter GF;
d18：光学过滤片GF的像侧面到像面的轴上距离；d18: the on-axis distance from the image side surface of the optical filter GF to the image surface;
nd：d线的折射率；nd: refractive index of d-line;
nd1：第一透镜L1的d线的折射率；nd1: the refractive index of the d-line of the first lens L1;
nd2：第二透镜L2的d线的折射率；nd2: the refractive index of the d-line of the second lens L2;
nd3：第三透镜L3的d线的折射率；nd3: the refractive index of the d-line of the third lens L3;
nd4：第四透镜L4的d线的折射率；nd4: the refractive index of the d-line of the fourth lens L4;
nd5：第五透镜L5的d线的折射率；nd5: the refractive index of the d-line of the fifth lens L5;
nd6：第六透镜L6的d线的折射率；nd6: the refractive index of the d-line of the sixth lens L6;
nd7：第七透镜L7的d线的折射率；nd7: the refractive index of the d-line of the seventh lens L7;
nd7：第八透镜L8的d线的折射率；nd7: the refractive index of the d-line of the eighth lens L8;
ndg：光学过滤片GF的d线的折射率；ndg: the refractive index of the d-line of the optical filter GF;
vd：阿贝数；vd: Abbe number;
v1：第一透镜L1的阿贝数；v1: Abbe number of the first lens L1;
v2：第二透镜L2的阿贝数；v2: Abbe number of the second lens L2;
v3：第三透镜L3的阿贝数；v3: Abbe number of the third lens L3;
v4：第四透镜L4的阿贝数；v4: Abbe number of the fourth lens L4;
v5：第五透镜L5的阿贝数；v5: Abbe number of the fifth lens L5;
v6：第六透镜L6的阿贝数；v6: Abbe number of the sixth lens L6;
v7：第七透镜L7的阿贝数；v7: Abbe number of the seventh lens L7;
v8：第八透镜L8的阿贝数；v8: Abbe number of the eighth lens L8;
vg：光学过滤片GF的阿贝数。vg: Abbe number of optical filter GF.
表2示出本发明第一实施方式的摄像光学镜头10中各透镜的非球面数据。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.
【表2】【Table 2】
Figure PCTCN2019125212-appb-000003
Figure PCTCN2019125212-appb-000003
其中，k是圆锥系数，A4、A6、A8、A10、A12、A14、A16是非球面系数。Among them, k is the conic coefficient, and A4, A6, A8, A10, A12, A14, and A16 are the aspheric coefficients.
IH：像高IH: Image height
y＝(x 2/R)/[1+{1-(k+1)(x 2/R 2)} 1/2]+A4x 4+A6x 6+A8x 8+A10x 10+A12x 12+A14x 14+A16x 16      (1) y=(x 2 /R)/[1+{1-(k+1)(x 2 /R 2 )} 1/2 ]+A4x 4 +A6x 6 +A8x 8 +A10x 10 +A12x 12 +A14x 14 +A16x 16 (1)
为方便起见，各个透镜面的非球面使用上述公式(1)中所示的非球面。但是，本发明不限于该公式(1)表示的非球面多项式形式。For convenience, the aspheric surface of each lens surface uses the aspheric surface shown in the above formula (1). However, the present invention is not limited to the aspheric polynomial form represented by the formula (1).
表3、表4示出本发明第一实施方式的摄像光学镜头10中各透镜的反曲点以及驻点设计数据。其中，P1R1、P1R2分别代表第一透镜L1的物侧面和像侧面，P2R1、P2R2分别代表第二透镜L2的物侧面和像侧面，P3R1、P3R2分别代表第三透镜L3的物侧面和像侧面，P4R1、P4R2分别代表第四透镜L4的物侧面和像侧面，P5R1、P5R2分别代表第五透镜L5的物侧面和像侧面，P6R1、P6R2分别代表第六透镜L6的物侧面和像侧面，P7R1、P7R2分别代表第七透镜L7的物侧面和像侧面，P8R1、P8R2分别代表第八透镜L8的物侧面和像侧面。“反曲点位置”栏位对应数据为各透镜表面所设置的反曲点到摄像光学镜头10光轴的垂直距离。“驻点位置”栏位对应数据为各透镜表面所设置的驻点到摄像光学镜头10光轴的垂直距离。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. Among them, 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, and 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, and 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.
【表3】【table 3】
 To 反曲点个数Number of recurve points 反曲点位置1 Recurve point position 1 反曲点位置2Recurve point position 2 反曲点位置3 Recurve point position 3
P1R1 P1R1 00  To  To  To
P1R2P1R2 22 0.3150.315 0.4150.415  To
P2R1P2R1 22 0.6550.655 0.8250.825  To
P2R2 P2R2 11 0.8450.845  To  To
P3R1 P3R1 00  To  To  To
P3R2 P3R2 11 0.8450.845  To  To
P4R1 P4R1 00  To  To  To
P4R2 P4R2 00  To  To  To
P5R1 P5R1 00  To  To  To
P5R2 P5R2 00  To  To  To
P6R1 P6R1 00  To  To  To
P6R2 P6R2 11 0.8750.875  To  To
P7R1 P7R1 11 0.6150.615  To  To
P7R2 P7R2 00  To  To  To
P8R1 P8R1 33 0.0750.075 1.3251.325 1.9051.905
P8R2 P8R2 11 0.5150.515  To  To
【表4】【Table 4】
 To 驻点个数Number of stationary points 驻点位置1Stagnation position 1
P1R1 P1R1 00  To
P1R2 P1R2 00  To
P2R1 P2R1 00  To
P2R2 P2R2 00  To
P3R1 P3R1 00  To
P3R2 P3R2 11 0.9550.955
P4R1 P4R1 00  To
P4R2 P4R2 00  To
P5R1 P5R1 00  To
P5R2 P5R2 00  To
P6R1 P6R1 00  To
P6R2 P6R2 11 1.2151.215
P7R1 P7R1 11 0.9950.995
P7R2 P7R2 00  To
P8R1 P8R1 11 0.1250.125
P8R2 P8R2 11 1.2351.235
图2、图3分别示出了波长为656nm、587nm、546nm、486nm和436nm的光经过第一实施方式的摄像光学镜头10后的轴向像差以及倍率色差示意图。图4则示出了，波长为546nm的光经过第一实施方式的摄像光学镜头10后的场曲及畸变示意图，图4的场曲S是弧矢方向的场曲，T是子午方向的场曲。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 436 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.
后出现的表13示出各实例1、2、3中各种数值与条件式中已规定的参数所对应的值。The following 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.
如表13所示，第一实施方式满足各条件式。As shown in Table 13, the first embodiment satisfies various conditional expressions.
在本实施方式中，所述摄像光学镜头的入瞳直径为1.659mm，全视场像高为2.90mm，对角线方向的视场角为84.40°，广角、超薄，其轴上、轴外色像差充分补正，且具有优秀的光学特征。In this embodiment, the entrance pupil diameter of the imaging optical lens is 1.659mm, the full-field image height is 2.90mm, the diagonal field angle is 84.40°, wide-angle, ultra-thin, and its axis and axis The external chromatic aberration is fully corrected and has excellent optical characteristics.
(第二实施方式)(Second embodiment)
第二实施方式与第一实施方式基本相同，符号含义与第一实施方式相同，以下只列出不同点。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.
表5、表6示出本发明第二实施方式的摄像光学镜头20的设计数据。Table 5 and Table 6 show design data of the imaging optical lens 20 according to the second embodiment of the present invention.
【表5】【table 5】
Figure PCTCN2019125212-appb-000004
Figure PCTCN2019125212-appb-000004
Figure PCTCN2019125212-appb-000005
Figure PCTCN2019125212-appb-000005
表6示出本发明第二实施方式的摄像光学镜头20中各透镜的非球面数据。Table 6 shows aspheric surface data of each lens in the imaging optical lens 20 according to the second embodiment of the present invention.
【表6】【Table 6】
Figure PCTCN2019125212-appb-000006
Figure PCTCN2019125212-appb-000006
表7、表8示出本发明第二实施方式的摄像光学镜头20中各透镜的反曲点以及驻点设计数据。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.
【表7】【Table 7】
 To 反曲点个数Number of recurve points 反曲点位置1 Recurve point position 1 反曲点位置2Recurve point position 2
P1R1 P1R1 00  To  To
P1R2 P1R2 11 0.4850.485  To
P2R1 P2R1 11 0.4650.465  To
P2R2 P2R2 11 0.6250.625  To
P3R1 P3R1 11 0.5950.595  To
P3R2 P3R2 00  To  To
P4R1 P4R1 11 0.8850.885  To
P4R2 P4R2 00  To  To
P5R1 P5R1 00  To  To
P5R2 P5R2 00  To  To
P6R1 P6R1 00  To  To
P6R2 P6R2 11 1.1651.165  To
P7R1P7R1 22 0.6950.695 1.5151.515
P7R2P7R2 22 0.5550.555 0.7450.745
P8R1P8R1 22 0.1650.165 1.2751.275
P8R2P8R2 22 0.4550.455 2.1052.105
【表8】【Table 8】
 To 驻点个数Number of stationary points 驻点位置1Stagnation position 1
P1R1 P1R1 00  To
P1R2 P1R2 00  To
P2R1 P2R1 00  To
P2R2 P2R2 00  To
P3R1 P3R1 00  To
P3R2 P3R2 00  To
P4R1 P4R1 00  To
P4R2 P4R2 00  To
P5R1 P5R1 00  To
P5R2 P5R2 00  To
P6R1 P6R1 00  To
P6R2 P6R2 00  To
P7R1 P7R1 11 1.0951.095
P7R2 P7R2 00  To
P8R1 P8R1 11 0.2950.295
P8R2 P8R2 11 0.9750.975
图6、图7分别示出了波长为656nm、587nm、546nm、486nm和436nm的光经过第二实施方式的摄像光学镜头20后的轴向像差以及倍率色差示意图。图8则示出了，波长为546nm的光经过第二实施方式的摄像光学镜头20后的场曲及畸变示意图。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 436 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.
如表13所示，第二实施方式满足各条件式。As shown in Table 13, the second embodiment satisfies various conditional expressions.
在本实施方式中，所述摄像光学镜头的入瞳直径为0.753mm，全视场像高为2.90mm，对角线方向的视场角为64.52°，广角、超薄，其轴上、轴外色像差充分补正，且具有优秀的光学特征。In this embodiment, the entrance pupil diameter of the imaging optical lens is 0.753mm, the full-field image height is 2.90mm, and the diagonal field angle is 64.52°, wide-angle, ultra-thin, and its axis and axis The external chromatic aberration is fully corrected and has excellent optical characteristics.
(第三实施方式)(Third embodiment)
第三实施方式与第一实施方式基本相同，符号含义与第一实施方式相同，以下只列出不同点。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.
表9、表10示出本发明第三实施方式的摄像光学镜头30的设计数据。Table 9 and Table 10 show design data of the imaging optical lens 30 according to the third embodiment of the present invention.
【表9】【Table 9】
Figure PCTCN2019125212-appb-000007
Figure PCTCN2019125212-appb-000007
Figure PCTCN2019125212-appb-000008
Figure PCTCN2019125212-appb-000008
表10示出本发明第三实施方式的摄像光学镜头30中各透镜的非球面数据。Table 10 shows the aspheric surface data of each lens in the imaging optical lens 30 of the third embodiment of the present invention.
【表10】【Table 10】
Figure PCTCN2019125212-appb-000009
Figure PCTCN2019125212-appb-000009
表11、表12示出本发明第三实施方式的摄像光学镜头30中各透 镜的反曲点以及驻点设计数据。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 invention.
【表11】【Table 11】
Figure PCTCN2019125212-appb-000010
Figure PCTCN2019125212-appb-000010
【表12】【Table 12】
 To 驻点个数Number of stationary points 驻点位置1Stagnation position 1 驻点位置2Stagnation position 2
P1R1 P1R1 00  To  To
P1R2 P1R2 00  To  To
P2R1 P2R1 00  To  To
P2R2 P2R2 00  To  To
P3R1 P3R1 11 0.7250.725  To
P3R2 P3R2 00  To  To
P4R1 P4R1 00  To  To
P4R2 P4R2 00  To  To
P5R1 P5R1 00  To  To
P5R2 P5R2 00  To  To
P6R1 P6R1 00  To  To
P6R2 P6R2 00  To  To
P7R1 P7R1 11 0.9250.925  To
P7R2 P7R2 00  To  To
P8R1P8R1 22 0.2950.295 2.0852.085
P8R2 P8R2 11 0.9150.915  To
图10、图11分别示出了波长为656nm、587nm、546nm、486nm和436nm的光经过第三实施方式的摄像光学镜头30后的轴向像差以及倍率色差示意图。图12则示出了，波长为546nm的光经过第三实施方式的摄像光学镜头30后的场曲及畸变示意图。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 436 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.
以下表13按照上述条件式列出了本实施方式中对应各条件式的数值。显然，本实施方式的摄像光学系统满足上述的条件式。The following Table 13 lists the numerical values corresponding to each conditional expression in this embodiment according to the above-mentioned conditional expressions. Obviously, the imaging optical system of this embodiment satisfies the above-mentioned conditional expressions.
在本实施方式中，所述摄像光学镜头的入瞳直径为1.102mm，全视场像高为2.90mm，对角线方向的视场角为60.00°，广角、超薄，其轴上、轴外色像差充分补正，且具有优秀的光学特征。In this embodiment, the entrance pupil diameter of the imaging optical lens is 1.102mm, the full-field image height is 2.90mm, the diagonal field angle is 60.00°, wide-angle, ultra-thin, and its axis and axis The external chromatic aberration is fully corrected and has excellent optical characteristics.
【表13】【Table 13】
参数及条件式Parameters and conditions 实施例1Example 1 实施例2Example 2 实施例3Example 3
f1/ff1/f 1.941.94 2.992.99 3.193.19
f2f2 -180.93-180.93 -4.02-4.02 -199.81-199.81
n4n4 1.571.57 1.671.67 1.671.67
ff 3.1523.152 1.4301.430 2.0952.095
f1f1 6.1166.116 4.2714.271 6.6926.692
f3f3 7.5757.575 6.6596.659 8.2958.295
f4f4 95.75795.757 1.6851.685 2.9392.939
f5f5 24.89824.898 81.04681.046 95.90895.908
f6f6 -11.687-11.687 -7.445-7.445 -6.486-6.486
f7f7 3.6143.614 3.9143.914 6.4426.442
f8f8 -2.548-2.548 -3.597-3.597 -3.766-3.766
f12f12 5.8505.850 27.87027.870 6.1816.181
FnoFno 1.9001.900 1.8991.899 1.9011.901
本领域的普通技术人员可以理解，上述各实施方式是实现本发明的具体实施方式，而在实际应用中，可以在形式上和细节上对其作各种改变，而不偏离本发明的精神和范围。A person of ordinary skill in the art can understand that the above-mentioned embodiments are specific embodiments for realizing the present invention, and in practical applications, various changes can be made to them in form and details without departing from the spirit and spirit of the present invention. range.

Claims (11)

  1. 一种摄像光学镜头，其特征在于，所述摄像光学镜头，自物侧至像侧依序包含：第一透镜，第二透镜，第三透镜，第四透镜，第五透镜，第六透镜，第七透镜，以及第八透镜；An imaging optical lens, characterized in that, from the object side to the image side, the imaging optical lens includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens, in order from the object side to the image side, The seventh lens, and the eighth lens;
    所述摄像光学镜头的焦距为f，所述第一透镜的焦距为f1，所述第二透镜的焦距为f2，所述第四透镜的折射率为n4，且满足下列关系式：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 refractive index of the fourth lens is n4, and the following relationship is satisfied:
    1.92≤f1/f≤3.20；1.92≤f1/f≤3.20;
    f2≤0.00；f2≤0.00;
    1.55≤n4≤1.70。1.55≤n4≤1.70.
  2. 根据权利要求1所述的摄像光学镜头，其特征在于，所述第六透镜的像侧面到所述第七透镜的物侧面的轴上距离为d12，所述第七透镜的轴上厚度为d13，且满足下列关系式：The imaging optical lens of claim 1, wherein the on-axis distance from the image side surface of the sixth lens to the object side surface of the seventh lens is d12, and the on-axis thickness of the seventh lens is d13 , And satisfy the following relationship:
    0.04≤d12/d13≤0.35。0.04≤d12/d13≤0.35.
  3. 根据权利要求1所述的摄像光学镜头，其特征在于，所述第二透镜物侧面的曲率半径为R3，所述第二透镜像侧面的曲率半径为R4，且满足下列关系式：The imaging optical lens of claim 1, wherein the curvature radius of the object side surface of the second lens is R3, and the curvature radius of the image side surface of the second lens is R4, and the following relationship is satisfied:
    2.00≤(R3+R4)/(R3-R4)≤23.00。2.00≤(R3+R4)/(R3-R4)≤23.00.
  4. 根据权利要求1所述的摄像光学镜头，其特征在于，所述第一透镜物侧面的曲率半径为R1，所述第一透镜像侧面的曲率半径为R2，所述第一透镜的轴上厚度为d1，所述摄像光学镜头的光学总长为TTL，且满足下列关系式：The imaging optical lens of claim 1, wherein the curvature radius of the object side surface of the first lens is R1, the curvature radius of the image side surface of the first lens is R2, and the on-axis thickness of the first lens Is d1, the total optical length of the camera optical lens is TTL, and satisfies the following relationship:
    -7.01≤(R1+R2)/(R1-R2)≤-1.25；0.04≤d1/TTL≤0.14。-7.01≤(R1+R2)/(R1-R2)≤-1.25; 0.04≤d1/TTL≤0.14.
  5. 根据权利要求1所述的摄像光学镜头，其特征在于，所述第二透镜的轴上厚度为d3，所述摄像光学镜头的光学总长为TTL，且满足下列关系式：The imaging optical lens of claim 1, wherein the axial thickness of the second lens is d3, and the total optical length of the imaging optical lens is TTL, and the following relationship is satisfied:
    -190.75≤f2/f≤-1.88；0.03≤d3/TTL≤0.13。-190.75≤f2/f≤-1.88; 0.03≤d3/TTL≤0.13.
  6. 根据权利要求1所述的摄像光学镜头，其特征在于，所述第三透镜的焦距为f3，所述第三透镜物侧面的曲率半径为R5，所述第三透镜像侧面的曲率半径为R6，所述第三透镜的轴上厚度为d5，所述摄像光学镜头的光学总长为TTL，且满足下列关系式：The imaging optical lens of claim 1, wherein the focal length of the third lens is f3, the radius of curvature of the object side of the third lens is R5, and the radius of curvature of the image side of the third lens is R6. , 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:
    1.20≤f3/f≤6.98；-0.56≤(R5+R6)/(R5-R6)≤-0.05；1.20≤f3/f≤6.98; -0.56≤(R5+R6)/(R5-R6)≤-0.05;
    0.03≤d5/TTL≤0.12。0.03≤d5/TTL≤0.12.
  7. 根据权利要求1所述的摄像光学镜头，其特征在于，所述第四透镜的焦距为f4，所述第四透镜物侧面的曲率半径为R7，所述第四透镜像侧面的曲率半径为R8，所述第四透镜的轴上厚度为d7，所述摄像光学镜头的光学总长为TTL，且满足下列关系式：The imaging optical lens of claim 1, wherein the focal length of the fourth lens is f4, the radius of curvature of the object side of the fourth lens is R7, and the radius of curvature of the image side of the fourth lens is R8. , The axial thickness of the fourth lens is d7, the total optical length of the imaging optical lens is TTL, and the following relationship is satisfied:
    0.59≤f4/f≤45.57；-1.63≤(R7+R8)/(R7-R8)≤9.23；0.59≤f4/f≤45.57; -1.63≤(R7+R8)/(R7-R8)≤9.23;
    0.02≤d7/TTL≤0.06。0.02≤d7/TTL≤0.06.
  8. 根据权利要求1所述的摄像光学镜头，其特征在于，所述第五透镜的焦距为f5，所述第五透镜物侧面的曲率半径为R9，所述第五透镜像侧面的曲率半径为R10，所述第五透镜的轴上厚度为d9，所述摄像光学镜头的光学总长为TTL，且满足下列关系式：The imaging optical lens of claim 1, wherein the focal length of the fifth lens is f5, the radius of curvature of the object side of the fifth lens is R9, and the radius of curvature of the image side of the fifth lens is R10 , The axial thickness of the fifth lens is d9, the total optical length of the imaging optical lens is TTL, and the following relationship is satisfied:
    3.95≤f5/f≤85.01；0.87≤(R9+R10)/(R9-R10)≤15.84；3.95≤f5/f≤85.01; 0.87≤(R9+R10)/(R9-R10)≤15.84;
    0.01≤d9/TTL≤0.07。0.01≤d9/TTL≤0.07.
  9. 根据权利要求1所述的摄像光学镜头，其特征在于，所述第六透镜的焦距为f6，所述第六透镜物侧面的曲率半径为R11，所述第六透镜像侧面的曲率半径为R12，所述第六透镜的轴上厚度为d11，所述摄像光学镜头的光学总长为TTL，且满足下列关系式：The imaging optical lens of claim 1, wherein the focal length of the sixth lens is f6, the radius of curvature of the object side of the sixth lens is R11, and the radius of curvature of the image side of the sixth lens is R12 , The on-axis thickness of the sixth lens is d11, the total optical length of the imaging optical lens is TTL, and the following relationship is satisfied:
    -10.41≤f6/f≤-2.06；-10.41≤f6/f≤-2.06;
    -11.31≤(R11+R12)/(R11-R12)≤-1.79；-11.31≤(R11+R12)/(R11-R12)≤-1.79;
    0.02≤d11/TTL≤0.17。0.02≤d11/TTL≤0.17.
  10. 根据权利要求1所述的摄像光学镜头，其特征在于，所述第七透镜的焦距为f7，所述第七透镜物侧面的曲率半径为R13，所述第七透镜像侧面的曲率半径为R14，所述第七透镜的轴上厚度为d13，所述摄像光学镜头的光学总长为TTL，且满足下列关系式：The imaging optical lens of claim 1, wherein the focal length of the seventh lens is f7, the radius of curvature of the object side of the seventh lens is R13, and the radius of curvature of the image side of the seventh lens is R14 , The axial thickness of the seventh lens is d13, the total optical length of the imaging optical lens is TTL, and the following relationship is satisfied:
    0.57≤f7/f≤4.61；0.57≤f7/f≤4.61;
    -1.72≤(R13+R14)/(R13-R14)≤-0.21；-1.72≤(R13+R14)/(R13-R14)≤-0.21;
    0.05≤d13/TTL≤0.27。0.05≤d13/TTL≤0.27.
  11. 根据权利要求1所述的摄像光学镜头，其特征在于，所述第八透镜的焦距为f8，所述第八透镜物侧面的曲率半径为R15，所述第八透镜像侧面的曲率半径为R16，所述第八透镜的轴上厚度为d15，所述摄像光学镜头的光学总长为TTL，且满足下列关系式：The imaging optical lens of claim 1, wherein the focal length of the eighth lens is f8, the radius of curvature of the object side of the eighth lens is R15, and the radius of curvature of the image side of the eighth lens is R16. , The axial thickness of the eighth lens is d15, the total optical length of the imaging optical lens is TTL, and the following relationship is satisfied:
    -5.03≤f8/f≤-0.54；-5.03≤f8/f≤-0.54;
    0.02≤d15/TTL≤0.11；0.02≤d15/TTL≤0.11;
    0.53≤(R15+R16)/(R15-R16)≤2.10。0.53≤(R15+R16)/(R15-R16)≤2.10.
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