WO2021128399A1 - Lentille de caméra optique - Google Patents

Lentille de caméra optique Download PDF

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Publication number
WO2021128399A1
WO2021128399A1 PCT/CN2019/129627 CN2019129627W WO2021128399A1 WO 2021128399 A1 WO2021128399 A1 WO 2021128399A1 CN 2019129627 W CN2019129627 W CN 2019129627W WO 2021128399 A1 WO2021128399 A1 WO 2021128399A1
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Prior art keywords
lens
curvature
imaging optical
radius
ttl
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PCT/CN2019/129627
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English (en)
Chinese (zh)
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朱军彦
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诚瑞光学(常州)股份有限公司
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Priority to PCT/CN2019/129627 priority Critical patent/WO2021128399A1/fr
Publication of WO2021128399A1 publication Critical patent/WO2021128399A1/fr

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/06—Panoramic objectives; So-called "sky lenses" including panoramic objectives having reflecting surfaces
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration

Definitions

  • the present invention relates to the field of optical lenses, in particular to an imaging optical lens suitable for portable terminal equipment such as smart phones and digital cameras, as well as imaging devices such as monitors and PC lenses.
  • the photosensitive devices of general photographic lenses are nothing more than photosensitive coupled devices (CCD) or complementary metal oxide semiconductor devices (Complementary Metal).
  • CCD photosensitive coupled devices
  • CMOS Sensor complementary metal oxide semiconductor devices
  • the 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 a good
  • the miniaturized camera lens with 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.
  • an embodiment of the present invention provides 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 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 third lens is n3
  • the on-axis thickness of the first lens Is d1 the on-axis distance from the image side surface of the first lens to the object side surface of the second lens is d2
  • 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 satisfying the following relationship:
  • the focal length of the third lens is f3, and satisfies the following relationship:
  • the focal length of the first lens is f1
  • the on-axis thickness of the first lens is d1
  • the total optical length of the imaging optical lens is TTL, and the following relationship is satisfied:
  • 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
  • the total optical length of the imaging optical lens is TTL, and satisfies the following relationship:
  • the radius of curvature of the object side surface of the third lens is R5
  • the radius of curvature of the image side surface 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 satisfies the following relationship:
  • 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,
  • 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:
  • 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:
  • the focal length of the sixth lens is f6, the radius of curvature of the object side of the sixth lens is R11, the radius of curvature of the image side of the sixth lens is R12, and the on-axis thickness of the sixth lens is d11 ,
  • the total optical length of the camera optical lens is TTL, and satisfies the following relationship:
  • 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 axial thickness of the seventh lens is d13
  • the total optical length of the camera optical lens is TTL, and satisfies the following relationship:
  • 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:
  • the beneficial effect of the present invention is that the imaging optical lens according to the present invention has excellent optical characteristics, meets the requirements of ultra-thin and wide-angle, and is especially suitable for mobile phone camera lens assemblies composed of high-pixel CCD, CMOS and other imaging elements. 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 the 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: a first lens L1, a second lens L2, an aperture S1, 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 defined as f1, f1 ⁇ 0, which specifies 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.
  • the focal length of the overall imaging optical lens 10 is f
  • the focal length of the second lens L2 is f2
  • the refractive index of the third lens L3 is defined as n3, 1.55 ⁇ n3 ⁇ 1.70, which helps to improve the performance of the optical system within the range of the conditional expression.
  • the on-axis thickness of the first lens L1 as d1
  • the on-axis distance from the image side surface of the first lens L1 to the object side surface of the second lens L2 is d2, 3.00 ⁇ d1/d2 ⁇ 10.00, under the condition
  • the range of the formula helps to compress the total length of the optical system and achieve ultra-thinness.
  • 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, -15.00 ⁇ (R1+R2)/(R1-R2) ⁇ -6.00, in the conditional formula Within the specified range, the degree of deflection of light passing through the lens can be eased, and aberrations can be effectively reduced.
  • the imaging optical lens 10 When the focal length of the imaging optical lens 10, the focal length of each lens, the on-axis distance from the image side of the related lens to the object side, and the on-axis thickness satisfy the above-mentioned relational expressions, the imaging optical lens 10 can have excellent optical characteristics. Meet the requirements of ultra-thin and wide-angle, especially suitable for mobile phone camera lens assembly and WEB camera lens composed of high-pixel CCD, CMOS and other imaging elements.
  • the focal length of the third lens is defined as f3, 1.00 ⁇ f3/f ⁇ 4.00, and the reasonable allocation of the focal length makes the system have better imaging quality and lower sensitivity. Preferably, 1.07 ⁇ f3/f ⁇ 3.89 is satisfied.
  • the focal length of the first lens L1 is f1, 3.04 ⁇ f1/f ⁇ 9.83, 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.
  • 4.87 ⁇ f1/f ⁇ 7.86 is satisfied.
  • 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: 0.02 ⁇ d1/TTL ⁇ 0.14, which is conducive to achieving ultra-thinness.
  • 0.03 ⁇ d1/TTL ⁇ 0.11 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, which satisfies the following relationship: -1.51 ⁇ (R3+R4)/(R3-R4) ⁇ 0.42,
  • the shape of the second lens L2 is specified.
  • the lens is within the range, as the lens becomes ultra-thin and wide-angle, it is beneficial to correct the problem of axial chromatic aberration.
  • -0.94 ⁇ (R3+R4)/(R3-R4) ⁇ 0.33 is satisfied.
  • the on-axis thickness of the second lens L2 is d3, which satisfies the following relationship: 0.01 ⁇ d3/TTL ⁇ 0.07, which is beneficial to realize ultra-thinness.
  • 0.02 ⁇ d3/TTL ⁇ 0.06 is satisfied.
  • the curvature radius of the object side surface of the third lens L3 is R5, and the curvature radius of the image side surface of the third lens L3 is R6, which satisfies the following relationship: -8.99 ⁇ (R5+R6)/(R5-R6) ⁇ -0.78, which can be effectively controlled
  • the shape of the third lens L3 is conducive to the molding of the third lens L3.
  • the degree of deflection of the light passing through the lens can be reduced, and aberrations can be effectively reduced.
  • it satisfies -5.62 ⁇ (R5+R6)/(R5-R6) ⁇ -0.98.
  • 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 ⁇ 0.10 is satisfied.
  • the focal length of the fourth lens L4 is f4 and satisfies the following relationship: -2.94 ⁇ f4/f ⁇ -0.83.
  • the reasonable distribution of the optical power enables the system to have better imaging quality and lower sensitivity.
  • it satisfies -1.84 ⁇ f4/f ⁇ -1.04.
  • 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, which satisfies the following relationship: 0.47 ⁇ (R7+R8)/(R7-R8) ⁇ 2.73, which is specified
  • This is the shape of the fourth lens L4.
  • it is beneficial to correct the aberration of the off-axis angle of view.
  • 0.75 ⁇ (R7+R8)/(R7-R8) ⁇ 2.19 is satisfied.
  • the on-axis thickness of the fourth lens L4 is d7, which satisfies the following relationship: 0.01 ⁇ d7/TTL ⁇ 0.04, which is beneficial to realize ultra-thinness.
  • 0.02 ⁇ d7/TTL ⁇ 0.03 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: 0.85 ⁇ f5/f ⁇ 3.21.
  • the limitation of the fifth lens L5 can effectively make the light angle of the imaging lens smooth and reduce the tolerance Sensitivity. Preferably, 1.36 ⁇ f5/f ⁇ 2.57 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: -0.79 ⁇ (R9+R10)/(R9-R10) ⁇ -0.09, which is the fifth
  • -0.49 ⁇ (R9+R10)/(R9-R10) ⁇ -0.12 is satisfied.
  • the on-axis thickness of the fifth lens L5 is d9, which satisfies the following relationship: 0.03 ⁇ d9/TTL ⁇ 0.10, which is beneficial to realize ultra-thinness.
  • 0.04 ⁇ d9/TTL ⁇ 0.08 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: -5.51 ⁇ f6/f ⁇ -1.37.
  • the system has better imaging quality and comparison.
  • Low sensitivity Preferably, it satisfies -3.45 ⁇ f6/f ⁇ -1.72.
  • 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: -0.66 ⁇ (R11+R12)/(R11-R12) ⁇ 0.04, the sixth lens is specified
  • the shape of L6 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.
  • -0.41 ⁇ (R11+R12)/(R11-R12) ⁇ 0.03 is satisfied.
  • the on-axis thickness of the sixth lens L6 is d11, which satisfies the following relationship: 0.03 ⁇ d11/TTL ⁇ 0.11, which is beneficial to realize ultra-thinness.
  • 0.05 ⁇ d11/TTL ⁇ 0.09 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: 0.46 ⁇ f7/f ⁇ 1.41.
  • the system has better imaging quality and lower Sensitivity.
  • 0.73 ⁇ f7/f ⁇ 1.13 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: -0.05 ⁇ (R13+R14)/(R13-R14) ⁇ 0.40, the seventh lens is specified
  • the shape of L7 is within the range of conditions, with the development of ultra-thin and wide-angle, it is conducive to correcting the aberration of off-axis angle of view.
  • -0.03 ⁇ (R13+R14)/(R13-R14) ⁇ 0.32 is satisfied.
  • the on-axis thickness of the seventh lens L7 is d13, which satisfies the following relationship: 0.05 ⁇ d13/TTL ⁇ 0.26, which is beneficial to realize ultra-thinness.
  • 0.09 ⁇ d13/TTL ⁇ 0.20 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: -1.27 ⁇ f8/f ⁇ -0.42.
  • the system has better imaging quality and comparison.
  • Low sensitivity Preferably, -0.79 ⁇ f8/f ⁇ -0.52 is satisfied.
  • the curvature radius R15 of the object side surface of the eighth lens L8 and the curvature radius R16 of the image side surface of the eighth lens L8 satisfy the following relationship: 0.09 ⁇ (R15+R16)/(R15-R16) ⁇ 0.56, and 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.
  • 0.15 ⁇ (R15+R16)/(R15-R16) ⁇ 0.44 is satisfied.
  • the on-axis thickness of the eighth lens L8 is d15, which satisfies the following relationship: 0.04 ⁇ d15/TTL ⁇ 0.18, which is beneficial to realize ultra-thinness.
  • 0.06 ⁇ d15/TTL ⁇ 0.14 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: 0.65 ⁇ f12/f ⁇ 4.15.
  • 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 ⁇ 1.87, which is beneficial to achieve ultra-thinness.
  • the angle of view FOV of the imaging optical lens 10 in the diagonal direction is greater than or equal to 71°, which is beneficial for realizing a wide angle.
  • 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 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 optical filter GF;
  • d16 the on-axis distance from the image side surface of the eighth lens L8 to the object side surface of the optical filter GF;
  • d17 the axial thickness of the optical filter GF
  • nd refractive index of d-line
  • nd1 the refractive index of the d-line of the first lens L1;
  • nd2 the refractive index of the d-line of the second lens L2;
  • nd3 the refractive index of the d-line of the third lens L3;
  • nd4 the refractive index of the d-line of the fourth lens L4;
  • nd5 the refractive index of the d-line of the fifth lens L5;
  • nd6 the refractive index of the d-line of the sixth lens L6;
  • nd7 the refractive index of the d-line of the seventh lens L7;
  • nd8 the refractive index of the d-line of the eighth lens L8;
  • ndg the refractive index of the d-line of the optical filter GF
  • vg Abbe number of optical filter GF.
  • Table 2 shows the aspheric surface data of each lens in the imaging optical lens 10 of the first embodiment of the present 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. 4 shows a schematic diagram of field curvature and distortion of light with a wavelength of 555 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 meridian 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 3.737mm
  • the full-field image height is 6.000mm
  • the diagonal field angle is 71.68°
  • 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 650 nm, 610 nm, 555 nm, 510 nm, 470 nm, and 436 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 555 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 3.422mm
  • the full-field image height is 5.800mm
  • the diagonal field angle is 72.20°
  • wide-angle is 5.800mm
  • ultra-thin is the 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 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 having wavelengths of 650 nm, 610 nm, 555 nm, 510 nm, 470 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 after light with a wavelength of 555 nm passes through the imaging optical lens 30 of the third embodiment.
  • the entrance pupil diameter of the imaging optical lens is 3.469mm
  • the full-field image height is 6.000mm
  • the diagonal field angle is 75.80°
  • the external chromatic aberration is fully corrected and has excellent optical characteristics.
  • Example 1 Example 2
  • Example 3 f2/f 4.90 1.60 3.22 n3 1.57 1.67 1.57
  • Fno is the aperture F number of the imaging optical lens.

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Abstract

L'invention concerne une lentille de caméra optique (10), qui se rapporte au domaine des lentilles optiques. La lentille de caméra optique (10) comprend séquentiellement, d'un côté objet à un côté image, une première lentille (L1), une deuxième lentille (L2), une troisième lentille (L3), une quatrième lentille (L4), une cinquième lentille (L5), une sixième lentille (L6), une septième lentille (L7), et une huitième lentille (L8) ; et satisfait les expressions relationnelles suivantes : f1 ≥ 0 ; 1,60 ≤ f2/f ≤ 5,00 ; 1,55 ≤ n3 ≤ 1,70 ; 3,00 ≤ d1/d2 ≤ 10,00 ; et -15,00 ≤ (R1 + R2)/ (R1-R2) ≤ -6,00. La lentille de caméra optique (10) présente d'excellentes caractéristiques optiques et répond aux exigences d'ultra-minceur et d'un grand angle.
PCT/CN2019/129627 2019-12-28 2019-12-28 Lentille de caméra optique WO2021128399A1 (fr)

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CN108594407A (zh) * 2018-06-26 2018-09-28 浙江舜宇光学有限公司 摄像镜头
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US4057328A (en) * 1974-12-30 1977-11-08 Olympus Optical Co., Ltd. Enlarging lens system
CN106886085A (zh) * 2015-12-15 2017-06-23 三星电机株式会社 光学系统及包括此的相机
CN105911672A (zh) * 2016-07-06 2016-08-31 苏州大学 短波红外宽波段复消色差像方远心望远物镜
CN107703608A (zh) * 2017-11-22 2018-02-16 浙江舜宇光学有限公司 光学成像镜头
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