WO2021109078A1 - Lentille optique photographique - Google Patents

Lentille optique photographique Download PDF

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Publication number
WO2021109078A1
WO2021109078A1 PCT/CN2019/123316 CN2019123316W WO2021109078A1 WO 2021109078 A1 WO2021109078 A1 WO 2021109078A1 CN 2019123316 W CN2019123316 W CN 2019123316W WO 2021109078 A1 WO2021109078 A1 WO 2021109078A1
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Prior art keywords
lens
curvature
imaging optical
radius
ttl
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PCT/CN2019/123316
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English (en)
Chinese (zh)
Inventor
王康
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诚瑞光学(常州)股份有限公司
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Priority to PCT/CN2019/123316 priority Critical patent/WO2021109078A1/fr
Publication of WO2021109078A1 publication Critical patent/WO2021109078A1/fr

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/06—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, 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 negative refractive power, a fourth lens with positive refractive power, a fifth lens with negative refractive power, a sixth lens with positive refractive power, and a seventh lens with negative refractive power;
  • the focal length of the imaging optical lens is f
  • the focal length of the fourth lens is f4
  • the focal length of the sixth lens is f6
  • the focal length of the seventh lens is f7
  • the image side of the fourth lens is
  • the on-axis distance of the object side surface of the fifth lens is d8, and the on-axis thickness of the fifth lens is d9, which satisfies the following relationship:
  • the radius of curvature of the object side surface of the fourth lens is R7
  • the radius of curvature of the image side surface of the fourth lens is R8, and the following relationship is satisfied:
  • 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:
  • the focal length of the first lens is f1
  • the radius of curvature of the object side of the first lens is R1
  • the radius of curvature of the image side of the first lens is R2
  • the 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:
  • the focal length of the second lens is f2
  • the on-axis thickness of the second lens is d3
  • the total optical length of the imaging optical lens is TTL, and the following relationship is satisfied:
  • 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:
  • 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 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
  • the axial thickness of the sixth lens is d11
  • the total optical length of the imaging optical lens is TTL, and satisfies the following relationship:
  • 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 imaging optical lens is TTL, and satisfies the following relationship:
  • the combined focal length of the first lens and the second lens is f12, which satisfies the following relationship: 5.77 ⁇ f12/f ⁇ 9.00.
  • 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 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 and seventh lens L7.
  • An optical element such as an optical filter GF may be provided between the seventh lens L7 and the image plane Si.
  • the focal length of the overall imaging optical lens 10 is f
  • the focal length of the fourth lens L4 is f4, 1.80 ⁇ f4/f ⁇ 5.00
  • the system has better imaging quality and lower Sensitivity.
  • 2.26 ⁇ f4/f ⁇ 4.90 is satisfied.
  • the focal length of the sixth lens L6 as f6, and the focal length of the seventh lens L7 as f7, -1.50 ⁇ f6/f7 ⁇ -1.00, which can effectively distribute the power of the sixth lens L6 and the seventh lens L7, Correct the aberration of the optical system to improve the image quality.
  • it satisfies -1.47 ⁇ f6/f7 ⁇ -1.09.
  • the on-axis thickness of the fifth lens L5 is d9, 1.20 ⁇ d8/d9 ⁇ 1.60, under the condition
  • the range of the formula helps to compress the total length of the optical system and achieve an ultra-thin effect.
  • 1.21 ⁇ d8/d9 ⁇ 1.58 is satisfied.
  • 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 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, -0.80 ⁇ (R7+R8)/(R7-R8) ⁇ -0.10, which specifies the fourth
  • the shape of the lens 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.
  • -0.75 ⁇ (R7+R8)/(R7-R8) ⁇ -0.10 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, 3.00 ⁇ (R3+R4)/(R3-R4) ⁇ 15.00, which specifies the second lens L2
  • the shape is within the range, it can ease the deflection of light passing through the lens and effectively reduce aberrations.
  • 4.43 ⁇ (R3+R4)/(R3-R4) ⁇ 14.49 is satisfied.
  • the focal length of the first lens L1 is f1, 0.52 ⁇ f1/f ⁇ 1.79, 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.
  • 0.83 ⁇ f1/f ⁇ 1.43 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: -4.86 ⁇ (R1+R2)/(R1-R2) ⁇ -1.19, reasonable control of the first lens
  • the shape of the lens enables the first lens to effectively correct the spherical aberration of the system.
  • -3.04 ⁇ (R1+R2)/(R1-R2) ⁇ -1.48 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: 0.07 ⁇ d1/TTL ⁇ 0.22, which is conducive to achieving ultra-thinness.
  • 0.12 ⁇ d1/TTL ⁇ 0.18 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: -17.04 ⁇ f2/f ⁇ -2.22.
  • the on-axis thickness of the second lens L2 is d3, which satisfies the following relationship: 0.02 ⁇ d3/TTL ⁇ 0.06, which is beneficial to realize ultra-thinness.
  • 0.03 ⁇ d3/TTL ⁇ 0.05 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: -12.70 ⁇ f3/f ⁇ -2.67.
  • the system has better imaging quality and Lower sensitivity.
  • -7.94 ⁇ f3/f ⁇ -3.34 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: 1.17 ⁇ (R5+R6)/(R5-R6) ⁇ 4.73, 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.
  • 1.87 ⁇ (R5+R6)/(R5-R6) ⁇ 3.79 is satisfied.
  • the on-axis thickness of the third lens L3 is d5, which satisfies the following relationship: 0.02 ⁇ d5/TTL ⁇ 0.06, which is beneficial to realize ultra-thinness.
  • 0.03 ⁇ d5/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, which satisfies the following relationship: -109.16 ⁇ f5/f ⁇ -2.43.
  • the limitation on the fifth lens L5 can effectively make the light angle of the imaging lens smooth. Reduce tolerance sensitivity.
  • -68.23 ⁇ f5/f ⁇ -3.04 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: 3.34 ⁇ (R9+R10)/(R9-R10) ⁇ 53.34, 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.
  • 5.35 ⁇ (R9+R10)/(R9-R10) ⁇ 42.67 is satisfied.
  • the on-axis thickness of the fifth lens L5 is d9, which satisfies the following relationship: 0.02 ⁇ d9/TTL ⁇ 0.08, which is beneficial to realize ultra-thinness.
  • 0.04 ⁇ 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: 0.38 ⁇ f6/f ⁇ 1.39.
  • the system has better imaging quality and lower Sensitivity.
  • 0.62 ⁇ f6/f ⁇ 1.11 is satisfied.
  • the radius of curvature R11 of the object side surface of the sixth lens L6 and the radius of curvature R12 of the image side surface of the sixth lens L6 satisfy the following relationship: -1.54 ⁇ (R11+R12)/(R11-R12) ⁇ -0.50, the sixth lens is specified
  • the shape of the lens L6 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.
  • -0.96 ⁇ (R11+R12)/(R11-R12) ⁇ -0.63 is satisfied.
  • the on-axis thickness of the sixth lens L6 is d11, which satisfies the following relationship: 0.04 ⁇ d11/TTL ⁇ 0.13, which is beneficial to realize ultra-thinness.
  • 0.06 ⁇ d11/TTL ⁇ 0.10 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: -1.31 ⁇ f7/f ⁇ -0.40.
  • the system has better imaging quality and comparison.
  • Low sensitivity Preferably, -0.82 ⁇ f7/f ⁇ -0.50 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: 0.07 ⁇ (R13+R14)/(R13-R14) ⁇ 0.32, the seventh lens L6 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.
  • 0.11 ⁇ (R13+R14)/(R13-R14) ⁇ 0.26 is satisfied.
  • the on-axis thickness of the seventh lens L7 is d13, which satisfies the following relationship: 0.03 ⁇ d13/TTL ⁇ 0.11, which is beneficial to realize ultra-thinness.
  • 0.06 ⁇ d13/TTL ⁇ 0.09 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: 5.77 ⁇ f12/f ⁇ 9.00.
  • 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 total optical length TTL of the imaging optical lens 10 is less than or equal to 7.37 mm, which is beneficial to realize ultra-thinness.
  • the total optical length TTL is less than or equal to 7.04 mm.
  • the aperture F number of the imaging optical lens 10 is less than or equal to 1.61. Large aperture, good imaging performance. Preferably, the aperture F number is less than or equal to 1.60.
  • 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, on-axis distance, radius of curvature, on-axis thickness, inflection point position, stagnation point position 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 object side of the optical filter GF
  • R16 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;
  • 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;
  • ndg the refractive index of the d-line of the optical filter GF
  • vg Abbe number of optical filter GF.
  • Table 2 shows the aspheric surface data of each lens in the imaging optical lens 10 according to the first embodiment of the present invention.
  • k is the conic coefficient
  • A4, A6, A8, A10, A12, A14, A16, A18, A20 are aspherical coefficients.
  • the aspheric surface of each lens surface uses the aspheric surface shown in the above formula (1).
  • the present invention is not limited to the aspheric polynomial form represented by the formula (1).
  • Table 3 and Table 4 show the design data of the inflection point and stagnation point of each lens in the imaging optical lens 10 of the first embodiment of the present invention.
  • P1R1 and P1R2 represent the object side and image side of the first lens L1 respectively
  • P2R1 and P2R2 represent the object side and image side of the second lens L2 respectively
  • P3R1 and P3R2 represent the object side and image side of the third lens L3 respectively.
  • P4R1, P4R2 represent the object side and image side of the fourth lens L4
  • P5R1, P5R2 represent the object side and image side of the fifth lens L5
  • P6R1, P6R2 represent the object side and image side of the sixth lens L6,
  • P7R1 P7R2 represents the object side and image side of the seventh lens L7, respectively.
  • 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 numerical 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 3.463mm
  • the full-field image height is 4.636mm
  • the diagonal field angle is 79.20°
  • 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 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 with wavelengths of 650 nm, 610 nm, 555 nm, 510 nm, and 470 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 3.462mm
  • the full-field image height is 4.636mm
  • the diagonal field angle is 79.40°
  • the external chromatic aberration is fully corrected and has excellent optical characteristics.
  • the third embodiment is basically the same as the first embodiment, and the meaning of the symbols is the same as that of the first embodiment, and only the differences are listed below.
  • Table 9 and Table 10 show design data of the imaging optical lens 30 according to the third embodiment of the present invention.
  • Table 10 shows the aspheric surface data of each lens in the imaging optical lens 30 of the third embodiment of the present invention.
  • Table 11 and Table 12 show the inflection point and stagnation point design data of each lens in the imaging optical lens 30 of the third embodiment of the present invention.
  • FIG. 10 and 11 respectively show schematic diagrams of axial aberration and chromatic aberration of magnification after light having wavelengths of 650 nm, 610 nm, 555 nm, 510 nm, and 470 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 3.494mm
  • the full-field image height is 4.636mm
  • the diagonal field angle is 78.68°
  • 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 f4/f 2.716 3.451 4.799 f6/f7 -1.178 -1.290 -1.450 d8/d9 1.403 1.210 1.548 f 5.540 5.539 5.591 f1 5.758 6.098 6.670 f2 -18.449 -27.905 -47.631 f3 -22.638 -22.188 -35.514 f4 15.046 19.113 26.832 f5 -20.224 -34.025 -305.158 f6 4.262 4.321 5.188 f7 -3.617 -3.349 -3.578 f12 7.496 7.209 7.296 Fno 1.600 1.600 1.600

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Abstract

L'invention concerne une lentille optique photographique (10), comprenant, séquentiellement d'un côté objet à un côté image : une première lentille (L1) ayant une réfringence positive, une deuxième lentille (L2) ayant une réfringence négative, une troisième lentille (L3) ayant une réfringence négative, une quatrième lentille (L4) ayant une réfringence positive, une cinquième lentille (L5) ayant une réfringence négative, une sixième lentille (L6) ayant une réfringence positive, et une septième lentille (L7) ayant une réfringence négative, la longueur focale de la lentille optique photographique (10) étant f, la longueur focale de la quatrième lentille (L4) étant f4, la longueur focale de la sixième lentille (L6) étant f6, la longueur focale de la septième lentille (L7) étant f7, la distance axiale d'une surface côté image de la quatrième lentille (L4) à une surface côté objet de la cinquième lentille (L5) étant d8, l'épaisseur axiale de la cinquième lentille (L5) étant d9, et les expressions relationnelles suivantes sont satisfaites : 1,80 ≤ f4/f ≤ 5,00 ; -1,50 ≤ f6/f7 ≤ -1,00 ; et 1,20 ≤ d8/d9 ≤ 1,60. La lentille optique photographique (10) présente de bonnes propriétés optiques telles qu'une grande ouverture, un grand angle et une ultra-minceur.
PCT/CN2019/123316 2019-12-05 2019-12-05 Lentille optique photographique WO2021109078A1 (fr)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115128771A (zh) * 2022-09-01 2022-09-30 江西联创电子有限公司 光学镜头

Citations (8)

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