WO2021128388A1 - 摄像光学镜头 - Google Patents

摄像光学镜头 Download PDF

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Publication number
WO2021128388A1
WO2021128388A1 PCT/CN2019/129613 CN2019129613W WO2021128388A1 WO 2021128388 A1 WO2021128388 A1 WO 2021128388A1 CN 2019129613 W CN2019129613 W CN 2019129613W WO 2021128388 A1 WO2021128388 A1 WO 2021128388A1
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Prior art keywords
lens
curvature
imaging optical
radius
ttl
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PCT/CN2019/129613
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English (en)
French (fr)
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陈佳
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诚瑞光学(常州)股份有限公司
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Priority to PCT/CN2019/129613 priority Critical patent/WO2021128388A1/zh
Publication of WO2021128388A1 publication Critical patent/WO2021128388A1/zh

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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

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 pixel size of photosensitive devices has been reduced, and the development trend of current electronic products with good functions, thin and short appearance, therefore, has The miniaturized camera lens with good image quality has become the mainstream in the current market.
  • the lenses traditionally mounted on mobile phone cameras mostly adopt a three-element or four-element lens structure.
  • 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 refractive index of the seven lens is n7
  • 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, which satisfies the following relationship: f1 ⁇ 0.00; 0.50 ⁇ f2/f ⁇ 2.00 ; 1.55 ⁇ n7 ⁇ 1.70; 3.00 ⁇ (R11+R12)/(R11-R12) ⁇ 9.00.
  • the on-axis thickness of the fourth lens is d7
  • the on-axis distance from the image side surface of the fourth lens to the object side surface of the fifth lens is d8, and the following relationship is satisfied: 3.50 ⁇ d7/d8 ⁇ 7.00.
  • 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: 0.91 ⁇ f1/f ⁇ 10172.11; -14.06 ⁇ (R1+R2)/(R1-R2) ⁇ 56.24; 0.02 ⁇ d1/TTL ⁇ 0.09.
  • 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: -1.87 ⁇ (R3+R4)/(R3-R4) ⁇ -0.19; 0.03 ⁇ d3/TTL ⁇ 0.14.
  • the focal length of the third lens is f3, the on-axis thickness of the third lens is d5, 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 total optical length of the camera optical lens is TTL, and satisfies the following relationship: -5.69 ⁇ f3/f ⁇ -0.77; 1.15 ⁇ (R5+R6)/(R5-R6) ⁇ 8.77; 0.01 ⁇ d5/TTL ⁇ 0.04.
  • the focal length of the fourth lens is f4, the on-axis thickness of the fourth lens is d7, 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 total optical length of the camera optical lens is TTL, and satisfies the following relationship: 0.78 ⁇ f4/f ⁇ 3.13; 0.51 ⁇ (R7+R8)/(R7-R8) ⁇ 2.97; 0.03 ⁇ d7/TTL ⁇ 0.23.
  • 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: -9.66 ⁇ f5/f ⁇ -1.47; -4.57 ⁇ (R9+R10)/(R9-R10) ⁇ -0.85; 0.01 ⁇ d9/ TTL ⁇ 0.05.
  • the focal length of the sixth lens is f6, the axial thickness of the sixth lens is d11, the total optical length of the imaging optical lens is TTL, and the following relationship is satisfied: -17.17 ⁇ f6/f ⁇ - 1.41; 0.01 ⁇ d11/TTL ⁇ 0.09.
  • the focal length of the seventh lens is f7
  • the radius of curvature of the object side of the seventh lens is R13
  • the radius of curvature of the image side of the seventh lens is R14
  • the on-axis thickness of the seventh lens is d13
  • the total optical length of the camera optical lens is TTL, and satisfies the following relationship: 0.89 ⁇ f7/f ⁇ 3.53; -10.65 ⁇ (R13+R14)/(R13-R14) ⁇ -2.16; 0.02 ⁇ d13/TTL ⁇ 0.12.
  • the focal length of the eighth lens is f8, the radius of curvature of the object side of the eighth lens is R15, the radius of curvature of the image side of the eighth lens is R16, and the on-axis thickness of the eighth lens is d15.
  • the total optical length of the camera optical lens is TTL, and satisfies the following relationship: -2.97 ⁇ f8/f ⁇ -0.92; 1.44 ⁇ (R15+R16)/(R15-R16) ⁇ 4.70; 0.06 ⁇ d15/TTL ⁇ 0.22.
  • the beneficial effects of the present invention are: according to the present invention, a large aperture, wide-angle, and ultra-thin optical camera lens with good optical performance is provided, and it is especially suitable for mobile phone camera lens assemblies composed of high-pixel CCD, CMOS and other imaging elements. 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 seven 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 focal length of the first lens L1 is f1, f1 ⁇ 0.00, which stipulates the positive and negative of the focal length of the first lens, and the reasonable allocation of the focal length enables the system to have better imaging quality and lower sensitivity.
  • f1 ⁇ 5.60 is satisfied.
  • the focal length of the overall imaging optical lens 10 is f
  • the focal length of the second lens L2 is f2
  • 0.50 ⁇ f2/f ⁇ 2.00 which specifies the ratio of the focal length of the second lens to the total focal length of the system, which can effectively balance the ball of the system Difference and curvature of field.
  • 0.55 ⁇ f2/f ⁇ 1.99 is satisfied.
  • the refractive index of the seventh lens is n7, which satisfies the following relational expression: 1.55 ⁇ n7 ⁇ 1.70, which specifies the refractive index of the seventh lens, which helps to improve the performance of the optical system within the range of the conditional expression.
  • the curvature radius R11 of the object side surface of the sixth lens L6 and the curvature radius R12 of the image side surface of the sixth lens L6 satisfy the following relationship: 3.00 ⁇ (R11+R12)/(R11-R12) ⁇ 9.00, which defines the shape of the sixth lens .
  • the degree of deflection of light passing through the lens can be eased, and aberrations can be effectively reduced.
  • the imaging optical lens 10 of the present invention When the focal length of the imaging optical lens 10 of the present invention, the focal length of each lens, the on-axis distance from the image side to the object side of the relevant lens, and the on-axis thickness satisfy the above relationship, the imaging optical lens 10 can be made to have high performance and satisfy Low TTL design requirements.
  • the on-axis thickness of the fourth lens is d7
  • the on-axis distance from the image side of the fourth lens to the object side of the fifth lens is d8, 3.50 ⁇ d7/d8 ⁇ 7.00, which specifies the thickness of the fourth lens
  • the ratio of the air space between the fourth and fifth lenses is helpful to compress the total optical length within the range of the conditional formula and realize the ultra-thinning effect.
  • 3.65 ⁇ d7/d8 ⁇ 6.93 is satisfied.
  • the focal length of the first lens L1 is f1, 0.91 ⁇ f1/f ⁇ 10172.11, which specifies the ratio of the focal length of the first lens L1 to the overall focal length.
  • the first lens has an appropriate positive refractive power, which is beneficial to reduce system aberrations, and at the same time, is beneficial to the development of ultra-thin and wide-angle lenses.
  • 1.45 ⁇ f1/f ⁇ 8137.69 is satisfied.
  • 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: -14.06 ⁇ (R1+R2)/(R1-R2) ⁇ 56.24, reasonable control of the first lens
  • the shape enables the first lens to effectively correct the spherical aberration of the system.
  • -8.79 ⁇ (R1+R2)/(R1-R2) ⁇ 45.00 is satisfied.
  • 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 ⁇ 0.09, which is conducive to achieving ultra-thinness.
  • 0.03 ⁇ d1/TTL ⁇ 0.07 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, -1.87 ⁇ (R3+R4)/(R3-R4) ⁇ -0.19, which specifies the second
  • the shape of the lens L2 is within the range, as the lens becomes ultra-thin and wide-angle, it is beneficial to correct the problem of axial chromatic aberration.
  • -1.17 ⁇ (R3+R4)/(R3-R4) ⁇ -0.24 is satisfied.
  • the on-axis thickness of the second lens L2 is d3, which satisfies the following relationship: 0.03 ⁇ d3/TTL ⁇ 0.14, which is beneficial to realize ultra-thinness.
  • 0.04 ⁇ d3/TTL ⁇ 0.11 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: -5.69 ⁇ f3/f ⁇ -0.77.
  • the reasonable distribution of the optical power makes the system have better imaging quality and Lower sensitivity. Satisfy -3.55 ⁇ f3/f ⁇ -0.96.
  • 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: 1.15 ⁇ (R5+R6)/(R5-R6) ⁇ 8.77, which can effectively control the third lens L3
  • the shape of is beneficial to the molding of the third lens L3.
  • the degree of deflection of light passing through the lens can be eased, and aberrations can be effectively reduced.
  • 1.84 ⁇ (R5+R6)/(R5-R6) ⁇ 7.02 is satisfied.
  • the on-axis thickness of the third lens L3 is d5, which satisfies the following relationship: 0.01 ⁇ d5/TTL ⁇ 0.04, which is beneficial to realize ultra-thinness.
  • 0.02 ⁇ d5/TTL ⁇ 0.03 is satisfied.
  • the focal length of the overall imaging optical lens 10 is defined as f, and the focal length of the fourth lens L4 is f4, 0.78 ⁇ f4/f ⁇ 3.13.
  • the reasonable distribution of the optical power enables the system to have better imaging quality and lower Sensitivity.
  • 1.24 ⁇ f4/f ⁇ 2.50 is satisfied.
  • the curvature radius of the object side surface of the fourth lens L4 is R7
  • the curvature radius of the image side surface of the fourth lens L4 is R8, 0.51 ⁇ (R7+R8)/(R7-R8) ⁇ 2.97
  • the fourth lens is specified
  • 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.
  • 0.82 ⁇ (R7+R8)/(R7-R8) ⁇ 2.37 is satisfied.
  • the on-axis thickness of the fourth lens L4 is d7, which satisfies the following relationship: 0.03 ⁇ d7/TTL ⁇ 0.23, which is beneficial to realize ultra-thinness.
  • 0.06 ⁇ d7/TTL ⁇ 0.19 is satisfied.
  • the focal length of the overall imaging optical lens 10 is f
  • the focal length of the fifth lens L5 is f5, which satisfies the following relationship: -9.66 ⁇ f5/f ⁇ -1.47.
  • the limitation on the fifth lens L5 can effectively make the light angle of the imaging lens Gentle, reduce tolerance sensitivity.
  • -6.04 ⁇ f5/f ⁇ -1.83 is satisfied.
  • the curvature radius of the object side surface of the fifth lens L5 is R9, and the curvature radius of the image side surface of the fifth lens L5 is R10, which satisfies the following relationship: -4.57 ⁇ (R9+R10)/(R9-R10) ⁇ -0.85, which is
  • -4.57 ⁇ (R9+R10)/(R9-R10) ⁇ -0.85 which is
  • it is beneficial to correct the aberration of the off-axis angle of view Preferably, -2.85 ⁇ (R9+R10)/(R9-R10) ⁇ -1.06 is satisfied.
  • the on-axis thickness of the fifth lens L5 is d9, which satisfies the following relationship: 0.01 ⁇ 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 is f
  • the focal length of the sixth lens L6 is f6, which satisfies the following relationship: -17.17 ⁇ f6/f ⁇ -1.41.
  • the system has better imaging quality and comparison.
  • Low sensitivity Preferably, -10.73 ⁇ f6/f ⁇ -1.76 is satisfied.
  • the on-axis thickness of the sixth lens L6 is d11, which satisfies the following relationship: 0.01 ⁇ d11/TTL ⁇ 0.09, which is beneficial to realize ultra-thinness.
  • 0.02 ⁇ d11/TTL ⁇ 0.07 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: 0.89 ⁇ f7/f ⁇ 3.53.
  • the reasonable distribution of optical power enables the system to have better imaging quality and lower Sensitivity.
  • 1.43 ⁇ f7/f ⁇ 2.82 is satisfied.
  • the curvature radius R13 of the object side surface of the seventh lens L7 and the curvature radius R14 of the image side surface of the seventh lens L7 satisfy the following relationship: -10.65 ⁇ (R13+R14)/(R13-R14) ⁇ -2.16, which is the seventh
  • -10.65 ⁇ (R13+R14)/(R13-R14) ⁇ -2.16 which is the seventh
  • it is beneficial to correct the aberration of the off-axis angle of view.
  • it satisfies -6.66 ⁇ (R13+R14)/(R13-R14) ⁇ -2.70.
  • the on-axis thickness of the seventh lens L7 is d13, which satisfies the following relationship: 0.02 ⁇ d13/TTL ⁇ 0.12, which is beneficial to realize ultra-thinness.
  • 0.03 ⁇ d13/TTL ⁇ 0.10 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: -2.97 ⁇ f8/f ⁇ -0.92.
  • the system has better imaging quality and comparison.
  • Low sensitivity Preferably, it satisfies -1.86 ⁇ f8/f ⁇ -1.15.
  • the curvature radius R15 of the object side surface of the eighth lens L8 and the curvature radius R17 of the image side surface of the eighth lens L8 satisfy the following relationship: 1.44 ⁇ (R15+R16)/(R15-R16) ⁇ 4.70, 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 helpful to correct the aberration of the off-axis angle of view.
  • 2.30 ⁇ (R15+R16)/(R15-R16) ⁇ 3.76 is satisfied.
  • the on-axis thickness of the eighth lens L8 is d15, which satisfies the following relationship: 0.06 ⁇ d15/TTL ⁇ 0.22, which is beneficial to realize ultra-thinness.
  • 0.10 ⁇ d15/TTL ⁇ 0.17 is satisfied.
  • the combined focal length of the first lens L1 and the second lens L2 is defined as f12, which satisfies the following relational expression: 0.32 ⁇ f12/f ⁇ 1.53.
  • the imaging optics can be eliminated
  • the aberration and distortion of the lens 10 can suppress the back focal length of the imaging optical lens 10 and maintain the miniaturization of the image lens system group.
  • the ratio between the total optical length TTL of the imaging optical lens 10 and the image height IH of the imaging optical lens 10 satisfies the following relationship: TTL/IH ⁇ 1.34, which is beneficial to realize ultra-thinness.
  • the angle of view FOV of the imaging optical lens 10 in the diagonal direction is greater than or equal to 84°, which is beneficial to realize a wide angle.
  • the aperture F number Fno of the imaging optical lens 10 is less than or equal to 1.96, the aperture is large, and the imaging performance is good.
  • the overall optical length TTL of the overall imaging optical lens 10 can be shortened as much as possible, and the characteristics of miniaturization can be maintained.
  • the 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 object side of the eighth lens L8;
  • R16 the radius of curvature of the image side surface of the eighth lens L8;
  • R17 the radius of curvature of the object side of the optical filter GF
  • R18 the radius of curvature of the image side surface of the optical filter GF
  • d0 the on-axis distance from the aperture S1 to the object side of the first lens L1;
  • d2 the on-axis distance from the image side surface of the first lens L1 to the object side surface of the second lens L2;
  • d4 the on-axis distance from the image side surface of the second lens L2 to the object side surface of the third lens L3;
  • d6 the on-axis distance from the image side surface of the third lens L3 to the object side surface of the fourth lens L4;
  • d10 the on-axis distance from the image side surface of the fifth lens L5 to the object side surface of the sixth lens L6;
  • d11 the on-axis thickness of the sixth lens L6;
  • d12 the on-axis distance from the image side surface of the sixth lens L6 to the object side surface of the seventh lens L7;
  • d14 the on-axis distance from the image side surface of the seventh lens L7 to the object side surface of the eighth lens L8;
  • d16 the on-axis distance from the image side surface of the eighth lens L8 to the object side surface of the optical filter GF;
  • d15 the axial thickness of the optical filter GF
  • d16 the on-axis distance from the image side surface of the optical filter GF to the image surface
  • nd refractive index of d-line
  • nd1 the refractive index of the d-line of the first lens L1;
  • nd2 the refractive index of the d-line of the second lens L2;
  • nd3 the refractive index of the d-line of the third lens L3;
  • nd4 the refractive index of the d-line of the fourth lens L4;
  • nd5 the refractive index of the d-line of the fifth lens L5;
  • nd6 the refractive index of the d-line of the sixth lens L6;
  • nd7 the refractive index of the d-line of the seventh lens L7;
  • nd8 the refractive index of the d-line of the eighth lens L8;
  • ndg the refractive index of the d-line of the optical filter GF
  • vg Abbe number of optical filter GF.
  • Table 2 shows the aspheric surface data of each lens in the imaging optical lens 10 of the first embodiment of the present 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.
  • FIG. 2 and 3 respectively show schematic diagrams of axial aberration and chromatic aberration of magnification after light having wavelengths of 436 nm, 486 nm, 546 nm, 587 nm, and 656 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 values in each of Examples 1, 2, and 3 and the parameters that have been specified in the conditional expressions.
  • the first embodiment satisfies various conditional expressions.
  • the entrance pupil diameter of the imaging optical lens is 3.164mm
  • the full-field image height is 6.000mm
  • the diagonal field angle is 87.50°
  • 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 the 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 having wavelengths of 436 nm, 486 nm, 546 nm, 587 nm, and 656 nm pass through the imaging optical lens 20 of the second embodiment.
  • FIG. 8 shows a schematic diagram of field curvature and distortion after light with a wavelength of 546 nm passes 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 3.166mm
  • the full-field image height is 6.000mm
  • the diagonal field angle is 87.48°
  • wide-angle, ultra-thin its axis
  • axis 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 according to 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 with wavelengths of 436 nm, 486 nm, 546 nm, 587 nm, and 656 nm pass through the imaging optical lens 30 of the third embodiment.
  • FIG. 12 shows a schematic diagram of field curvature and distortion after light with a wavelength of 546 nm passes through the imaging optical lens 30 of the third embodiment.
  • the entrance pupil diameter of the imaging optical lens is 3.365mm
  • the full-field image height is 6.000mm
  • the diagonal field angle is 84.00°
  • 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 f 6.170 6.173 6.562 f1 17.274 11.200 44499.579 f2 9.236 12.223 3.921 f3 -16.883 -17.547 -7.553 f4 9.585 11.800 13.671 f5 -13.577 -29.831 -16.251 f6 -52.957 -13.028 -26.064 f7 14.524 11.023 14.384 f8 -8.517 -9.179 -9.197 f12 6.295 6.161 4.136 Fno 1.95 1.95 1.95 f2/f 1.50 1.98 0.60 n7 1.66 1.57 1.67 (R11+R12)/(R11-R12) 9.00 3.06 5.60

Abstract

一种摄像光学镜头（10），摄像光学镜头（10）自物侧至像侧依序包含：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）；且满足下列关系式：f1≥0.00；0.50≤f2/f≤2.00；1.55≤n7≤1.70；3.00≤(R11+R12)/(R11-R12)≤9.00。摄像光学镜头（10）具有大光圈、广角化和超薄等良好的光学性能。

Description

摄像光学镜头 技术领域
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。
背景技术
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-Oxide Semiconductor 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。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或四片式透镜结构。并且，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，五片式、六片式、八片式透镜结构逐渐出现在镜头设计当中。迫切需求具有优秀的光学特征、超薄的广角摄像光学镜头。
发明内容
针对上述问题，本发明的目的在于提供一种摄像光学镜头，能在获得高成像性能的同时，满足超薄化和广角化的要求。
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：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；所述摄像光学镜头的焦距为f，所述第一镜的焦距为f1，所述第二镜的焦距为f2，所述第七透镜的折射率为n7，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，满足下列关系式：f1≥0.00；0.50≤f2/f≤2.00；1.55≤n7≤1.70；3.00≤(R11+R12)/(R11-R12)≤9.00。
优选地，所述第四透镜的轴上厚度为d7，所述第四透镜的像侧面到所述第五透镜的物侧面的轴上距离为d8，且满足下列关系式：3.50 ≤d7/d8≤7.00。
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：0.91≤f1/f≤10172.11；-14.06≤(R1+R2)/(R1-R2)≤56.24；0.02≤d1/TTL≤0.09。
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，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：-1.87≤(R3+R4)/(R3-R4)≤-0.19；0.03≤d3/TTL≤0.14。
优选地，所述第三透镜的焦距为f3，所述第三透镜的轴上厚度为d5，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，所述摄像光学镜头的光学总长为TTL，且满足下列关系式：-5.69≤f3/f≤-0.77；1.15≤(R5+R6)/(R5-R6)≤8.77；0.01≤d5/TTL≤0.04。
优选地，所述第四透镜的焦距为f4，所述第四透镜的轴上厚度为d7，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，所述摄像光学镜头的光学总长为TTL，且满足下列关系式：0.78≤f4/f≤3.13；0.51≤(R7+R8)/(R7-R8)≤2.97；0.03≤d7/TTL≤0.23。
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：-9.66≤f5/f≤-1.47；-4.57≤(R9+R10)/(R9-R10)≤-0.85；0.01≤d9/TTL≤0.05。
优选地，所述第六透镜的焦距为f6，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：-17.17≤f6/f≤-1.41；0.01≤d11/TTL≤0.09。
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：0.89≤f7/f≤3.53；-10.65≤(R13+R14)/(R13-R14)≤-2.16；0.02≤d13/TTL≤0.12。
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：-2.97≤f8/f≤-0.92；1.44≤(R15+R16)/(R15-R16)≤4.70；0.06≤ d15/TTL≤0.22。
本发明的有益效果在于：根据本发明提供具有良好光学性能的大光圈、广角化、超薄的光学摄像镜头，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。
附图说明
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；
图2是图1所示摄像光学镜头的轴向像差示意图；
图3是图1所示摄像光学镜头的倍率色差示意图；
图4是图1所示摄像光学镜头的场曲及畸变示意图；
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；
图6是图5所示摄像光学镜头的轴向像差示意图；
图7是图5所示摄像光学镜头的倍率色差示意图；
图8是图5所示摄像光学镜头的场曲及畸变示意图；
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；
图10是图9所示摄像光学镜头的轴向像差示意图；
图11是图9所示摄像光学镜头的倍率色差示意图；
图12是图9所示摄像光学镜头的场曲及畸变示意图。
具体实施方式
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。
(第一实施方式)
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包括七个透镜。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。
所述第一透镜L1的焦距为f1，f1≥0.00，规定了第一透镜焦距的正负，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，满足f1≥5.60。
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：0.50≤f2/f≤2.00，规定了第二透镜焦距与系统总焦距的比值，可以有效地平衡系统的球差以及场曲量。优选地，满足0.55≤f2/f≤1.99。
所述第七透镜的折射率为n7，满足下列关系式：1.55≤n7≤1.70，规定了第七透镜的折射率，在条件式范围内有助于提高光学系统性能。
第六透镜L6物侧面的曲率半径R11，第六透镜L6像侧面的曲率半径R12，满足下列关系式：3.00≤(R11+R12)/(R11-R12)≤9.00，规定了第六透镜的形状，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。
当本发明所述摄像光学镜头10的焦距、各透镜的焦距、相关透镜像侧面到物侧面的轴上距离、轴上厚度满足上述关系式时，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。
所述第四透镜的轴上厚度为d7，所述第四透镜的像侧面到所述第五透镜的物侧面的轴上距离为d8，3.50≤d7/d8≤7.00，规定了第四透镜厚度与第四第五透镜空气间隔的比值，在条件式范围内有助于压缩光学总长，实现超薄化效果。优选地，满足3.65≤d7/d8≤6.93。
所述第一透镜L1的焦距为f1，0.91≤f1/f≤10172.11，规定了第一透镜L1的焦距与整体焦距的比值。在规定的范围内时，第一透镜具有适当的正屈折力，有利于减小系统像差，同时有利于镜头向超薄化、广角化发展。优选地，满足1.45≤f1/f≤8137.69。
第一透镜L1物侧面的曲率半径R1，第一透镜L1像侧面的曲率半径R2，满足下列关系式：-14.06≤(R1+R2)/(R1-R2)≤56.24，合理控制第一透镜的形状，使得第一透镜能够有效地校正系统球差。优选地，满足-8.79≤(R1+R2)/(R1-R2)≤45.00。
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：0.02≤d1/TTL≤0.09，有利于实现超薄化。优选地，满足0.03≤d1/TTL≤0.07。
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，-1.87≤(R3+R4)/(R3-R4)≤-0.19，规定了第二透 镜L2的形状，在范围内时，随着镜头向超薄广角化发展，有利于补正轴上色像差问题。优选地，满足-1.17≤(R3+R4)/(R3-R4)≤-0.24。
第二透镜L2的轴上厚度为d3，满足下列关系式：0.03≤d3/TTL≤0.14，有利于实现超薄化。优选地，满足0.04≤d3/TTL≤0.11。
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：-5.69≤f3/f≤-0.77，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。满足-3.55≤f3/f≤-0.96。
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：1.15≤(R5+R6)/(R5-R6)≤8.77，可有效控制第三透镜L3的形状，有利于第三透镜L3成型，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1.84≤(R5+R6)/(R5-R6)≤7.02。
第三透镜L3的轴上厚度为d5，满足下列关系式：0.01≤d5/TTL≤0.04，有利于实现超薄化。优选地，满足0.02≤d5/TTL≤0.03。
定义整体摄像光学镜头10的焦距为f，所述第四透镜L4的焦距为f4，0.78≤f4/f≤3.13，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1.24≤f4/f≤2.50。
所述第四透镜L4物侧面的曲率半径为R7，所述第四透镜L4像侧面的曲率半径为R8，0.51≤(R7+R8)/(R7-R8)≤2.97，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0.82≤(R7+R8)/(R7-R8)≤2.37。
第四透镜L4的轴上厚度为d7，满足下列关系式：0.03≤d7/TTL≤0.23，有利于实现超薄化。优选地，满足0.06≤d7/TTL≤0.19。
整体摄像光学镜头10的焦距为f，第五透镜L5的焦距为f5，满足下列关系式：-9.66≤f5/f≤-1.47，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-6.04≤f5/f≤-1.83。
第五透镜L5物侧面的曲率半径为R9，第五透镜L5像侧面的曲率半径为R10，满足下列关系式：-4.57≤(R9+R10)/(R9-R10)≤-0.85，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-2.85≤(R9+R10)/(R9-R10)≤-1.06。
第五透镜L5的轴上厚度为d9，满足下列关系式：0.01≤d9/TTL≤0.05，有利于实现超薄化。优选地，满足0.02≤d9/TTL≤0.04。
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：-17.17≤f6/f≤-1.41，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-10.73≤f6/f≤-1.76。
第六透镜L6的轴上厚度为d11，满足下列关系式：0.01≤d11/TTL≤0.09，有利于实现超薄化。优选地，满足0.02≤d11/TTL≤0.07。
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：0.89≤f7/f≤3.53，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1.43≤f7/f≤2.82。
第七透镜L7物侧面的曲率半径R13，第七透镜L7像侧面的曲率半径R14，满足下列关系式：-10.65≤(R13+R14)/(R13-R14)≤-2.16，规定的是第七透镜L6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-6.66≤(R13+R14)/(R13-R14)≤-2.70。
第七透镜L7的轴上厚度为d13，满足下列关系式：0.02≤d13/TTL≤0.12，有利于实现超薄化。优选地，满足0.03≤d13/TTL≤0.10。
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：-2.97≤f8/f≤-0.92，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-1.86≤f8/f≤-1.15。
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R17，满足下列关系式：1.44≤(R15+R16)/(R15-R16)≤4.70，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2.30≤(R15+R16)/(R15-R16)≤3.76。
第八透镜L8的轴上厚度为d15，满足下列关系式：0.06≤d15/TTL≤0.22，有利于实现超薄化。优选地，满足0.10≤d15/TTL≤0.17。
本实施方式中，定义所述第一透镜L1与所述第二透镜L2的组合焦距为f12，满足下列关系式：0.32≤f12/f≤1.53，在条件式范围内，可消除所述摄像光学镜头10的像差与歪曲，且可压制摄像光学镜头10后焦距，维持影像镜片系统组小型化。优选的，0.50≤f12/f≤1.22。
本实施方式中，摄像光学镜头10的光学总长TTL与摄像光学镜头10的像高IH之间的比值满足下列关系式：TTL/IH≤1.34，有利于实现超薄化。
本实施方式中，摄像光学镜头10的对角线方向的视场角FOV大于或等于84°，有利于实现广角化。
本实施方式中，摄像光学镜头10的光圈F数Fno小于或等于1.96，大光圈，成像性能好。
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。
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。
TTL：光学总长(第一透镜L1的物侧面到成像面的轴上距离)，单位为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。
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。
【表1】
Figure PCTCN2019129613-appb-000001
其中，各符号的含义如下。
S1：光圈；
R：光学面的曲率半径、透镜时为中心曲率半径；
R1：第一透镜L1的物侧面的曲率半径；
R2：第一透镜L1的像侧面的曲率半径；
R3：第二透镜L2的物侧面的曲率半径；
R4：第二透镜L2的像侧面的曲率半径；
R5：第三透镜L3的物侧面的曲率半径；
R6：第三透镜L3的像侧面的曲率半径；
R7：第四透镜L4的物侧面的曲率半径；
R8：第四透镜L4的像侧面的曲率半径；
R9：第五透镜L5的物侧面的曲率半径；
R10：第五透镜L5的像侧面的曲率半径；
R11：第六透镜L6的物侧面的曲率半径；
R12：第六透镜L6的像侧面的曲率半径；
R13：第七透镜L7的物侧面的曲率半径；
R14：第七透镜L7的像侧面的曲率半径；
R15：第八透镜L8的物侧面的曲率半径；
R16：第八透镜L8的像侧面的曲率半径；
R17：光学过滤片GF的物侧面的曲率半径；
R18：光学过滤片GF的像侧面的曲率半径；
d：透镜的轴上厚度与透镜之间的轴上距离；
d0：光圈S1到第一透镜L1的物侧面的轴上距离；
d1：第一透镜L1的轴上厚度；
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；
d3：第二透镜L2的轴上厚度；
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；
d5：第三透镜L3的轴上厚度；
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；
d7：第四透镜L4的轴上厚度；
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；
d9：第五透镜L5的轴上厚度；
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；
d11：第六透镜L6的轴上厚度；
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；
d13：第七透镜L7的轴上厚度；
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；
d15：第八透镜L8的轴上厚度；
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；
d15：光学过滤片GF的轴上厚度；
d16：光学过滤片GF的像侧面到像面的轴上距离；
nd：d线的折射率；
nd1：第一透镜L1的d线的折射率；
nd2：第二透镜L2的d线的折射率；
nd3：第三透镜L3的d线的折射率；
nd4：第四透镜L4的d线的折射率；
nd5：第五透镜L5的d线的折射率；
nd6：第六透镜L6的d线的折射率；
nd7：第七透镜L7的d线的折射率；
nd8：第八透镜L8的d线的折射率；
ndg：光学过滤片GF的d线的折射率；
vd：阿贝数；
v1：第一透镜L1的阿贝数；
v2：第二透镜L2的阿贝数；
v3：第三透镜L3的阿贝数；
v4：第四透镜L4的阿贝数；
v5：第五透镜L5的阿贝数；
v6：第六透镜L6的阿贝数；
v7：第七透镜L7的阿贝数；
v8：第八透镜L8的阿贝数；
vg：光学过滤片GF的阿贝数。
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。
【表2】
Figure PCTCN2019129613-appb-000002
其中，k是圆锥系数，A4、A6、A8、A10、A12、A14、A16、A18、A20是非球面系数。
IH：像高
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+A18x 18+A20x 20          (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。
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。
【表3】
  反曲点个数 反曲点位置1 反曲点位置2 反曲点位置3
P1R1 0      
P1R2 2 1.205 1.395  
P2R1 2 0.975 1.595  
P2R2 0      
P3R1 2 1.285 1.325  
P3R2 0      
P4R1 1 1.685    
P4R2 1 1.815    
P5R1 2 1.705 2.025  
P5R2 2 1.885 2.395  
P6R1 2 1.295 2.865  
P6R2 2 1.545 3.525  
P7R1 1 1.525    
P7R2 3 1.515 3.165 3.935
P8R1 2 0.605 2.605  
P8R2 3 1.015 4.855 4.935
【表4】
  驻点个数 驻点位置1 驻点位置2
P1R1 0    
P1R2 0    
P2R1 0    
P2R2 0    
P3R1 0    
P3R2 0    
P4R1 1 1.965  
P4R2 0    
P5R1 0    
P5R2 0    
P6R1 1 1.955  
P6R2 1 2.435  
P7R1 1 2.405  
P7R2 1 2.335  
P8R1 2 1.125 4.265
P8R2 1 2.345  
图2、图3分别示出了波长为436nm、486nm、546nm、587nm和656nm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。
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。
如表13所示，第一实施方式满足各条件式。
在本实施方式中，所述摄像光学镜头的入瞳直径为3.164mm，全视场像高为6.000mm，对角线方向的视场角为87.50°，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。
(第二实施方式)
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。
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。
【表5】
Figure PCTCN2019129613-appb-000003
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。
【表6】
Figure PCTCN2019129613-appb-000004
Figure PCTCN2019129613-appb-000005
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。
【表7】
  反曲点个数 反曲点位置1 反曲点位置2 反曲点位置3 反曲点位置4
P1R1 1 1.355      
P1R2 1 0.975      
P2R1 1 0.605      
P2R2 0        
P3R1 2 0.455 1.515    
P3R2 2 0.785 1.465    
P4R1 2 0.135 0.765    
P4R2 1 2.175      
P5R1 2 1.595 2.105    
P5R2 2 1.575 2.405    
P6R1 2 1.355 2.845    
P6R2 2 1.495 3.515    
P7R1 1 1.565      
P7R2 4 1.645 3.255 3.845 4.095
P8R1 3 0.655 2.665 4.445  
P8R2 3 1.075 4.875 5.035  
【表8】
Figure PCTCN2019129613-appb-000006
Figure PCTCN2019129613-appb-000007
图6、图7分别示出了波长为436nm、486nm、546nm、587nm和656nm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。
如表13所示，第二实施方式满足各条件式。
在本实施方式中，所述摄像光学镜头的入瞳直径为3.166mm，全视场像高为6.000mm，对角线方向的视场角为87.48°，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。
(第三实施方式)
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。
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。
【表9】
Figure PCTCN2019129613-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。
【表10】
Figure PCTCN2019129613-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。
【表11】
  反曲点个数 反曲点位置1 反曲点位置2 反曲点位置3
P1R1 1 1.195    
P1R2 1 1.075    
P2R1 0      
P2R2 2 0.965 1.595  
P3R1 1 1.485    
P3R2 0      
P4R1 0      
P4R2 2 1.365 1.905  
P5R1 2 1.645 1.845  
P5R2 0      
P6R1 3 1.285 2.785 2.995
P6R2 1 1.465    
P7R1 2 1.525 3.515  
P7R2 3 1.505 3.135 3.795
P8R1 2 0.615 2.605  
P8R2 2 0.955 4.585  
【表12】
Figure PCTCN2019129613-appb-000010
Figure PCTCN2019129613-appb-000011
图10、图11分别示出了波长为436nm、486nm、546nm、587nm和656nm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。
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。
在本实施方式中，所述摄像光学镜头的入瞳直径为3.365mm，全视场像高为6.000mm，对角线方向的视场角为84.00°，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。
【表13】
参数及条件式 实施例1 实施例2 实施例3
f 6.170 6.173 6.562
f1 17.274 11.200 44499.579
f2 9.236 12.223 3.921
f3 -16.883 -17.547 -7.553
f4 9.585 11.800 13.671
f5 -13.577 -29.831 -16.251
f6 -52.957 -13.028 -26.064
f7 14.524 11.023 14.384
f8 -8.517 -9.179 -9.197
f12 6.295 6.161 4.136
Fno 1.95 1.95 1.95
f2/f 1.50 1.98 0.60
n7 1.66 1.57 1.67
(R11+R12)/(R11-R12) 9.00 3.06 5.60
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。

Claims (10)

  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；
    所述摄像光学镜头的焦距为f，所述第一镜的焦距为f1，所述第二镜的焦距为f2，所述第七透镜的折射率为n7，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，满足下列关系式：
    f1≥0.00；
    0.50≤f2/f≤2.00；
    1.55≤n7≤1.70；
    3.00≤(R11+R12)/(R11-R12)≤9.00。
  2. 根据权利要求1所述的摄像光学镜头，其特征在于，所述第四透镜的轴上厚度为d7，所述第四透镜的像侧面到所述第五透镜的物侧面的轴上距离为d8，且满足下列关系式：
    3.50≤d7/d8≤7.00。
  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：
    0.91≤f1/f≤10172.11；
    -14.06≤(R1+R2)/(R1-R2)≤56.24；
    0.02≤d1/TTL≤0.09。
  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，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：
    -1.87≤(R3+R4)/(R3-R4)≤-0.19；
    0.03≤d3/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，所述第三透镜的焦距为f3，所述第三透镜的轴上厚度为d5，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，所述摄像光学镜头的光学总长为TTL，且满足下列关系式：
    -5.69≤f3/f≤-0.77；
    1.15≤(R5+R6)/(R5-R6)≤8.77；
    0.01≤d5/TTL≤0.04。
  6. 根据权利要求1所述的摄像光学镜头，其特征在于，所述第四透镜的焦距为f4，所述第四透镜的轴上厚度为d7，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，所述摄像光学镜头的光学总长为TTL，且满足下列关系式：
    0.78≤f4/f≤3.13；0.51≤(R7+R8)/(R7-R8)≤2.97；
    0.03≤d7/TTL≤0.23。
  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：
    -9.66≤f5/f≤-1.47；-4.57≤(R9+R10)/(R9-R10)≤-0.85；
    0.01≤d9/TTL≤0.05。
  8. 根据权利要求1所述的摄像光学镜头，其特征在于，所述第六透镜的焦距为f6，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：
    -17.17≤f6/f≤-1.41；
    0.01≤d11/TTL≤0.09。
  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：
    0.89≤f7/f≤3.53；-10.65≤(R13+R14)/(R13-R14)≤-2.16；
    0.02≤d13/TTL≤0.12。
  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：
    -2.97≤f8/f≤-0.92；
    1.44≤(R15+R16)/(R15-R16)≤4.70；
    0.06≤d15/TTL≤0.22。
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JP2006065141A (ja) * 2004-08-30 2006-03-09 Nidec Copal Corp テレセントリックレンズ
JP2012042766A (ja) * 2010-08-19 2012-03-01 Ricoh Co Ltd 読取レンズ、画像読取装置および画像形成装置
CN208953765U (zh) * 2018-10-19 2019-06-07 广东奥普特科技股份有限公司 一种高倍率大靶面高解析度线扫机器视觉镜头
CN209148942U (zh) * 2018-10-22 2019-07-23 浙江舜宇光学有限公司 光学成像镜头
CN110456476A (zh) * 2018-05-07 2019-11-15 康达智株式会社 摄像镜头

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JP2006065141A (ja) * 2004-08-30 2006-03-09 Nidec Copal Corp テレセントリックレンズ
JP2012042766A (ja) * 2010-08-19 2012-03-01 Ricoh Co Ltd 読取レンズ、画像読取装置および画像形成装置
CN110456476A (zh) * 2018-05-07 2019-11-15 康达智株式会社 摄像镜头
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