WO2021134330A1 - Lentille optique de caméra - Google Patents

Lentille optique de caméra Download PDF

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Publication number
WO2021134330A1
WO2021134330A1 PCT/CN2019/130160 CN2019130160W WO2021134330A1 WO 2021134330 A1 WO2021134330 A1 WO 2021134330A1 CN 2019130160 W CN2019130160 W CN 2019130160W WO 2021134330 A1 WO2021134330 A1 WO 2021134330A1
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Prior art keywords
lens
imaging optical
curvature
radius
ttl
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PCT/CN2019/130160
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English (en)
Chinese (zh)
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窦沂蒙
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诚瑞光学(常州)股份有限公司
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Priority to PCT/CN2019/130160 priority Critical patent/WO2021134330A1/fr
Publication of WO2021134330A1 publication Critical patent/WO2021134330A1/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

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 object of the present invention is to provide an imaging optical lens, which has good optical performance, high resolution, wide angle, and good imaging quality.
  • 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.
  • At least one of the first lens to the sixth lens includes a free-form surface, the focal length of the imaging optical lens is f, the focal length of the first lens is f1, the focal length of the third lens is f3, and Satisfy the following relationship: 0.80 ⁇ f3/f ⁇ 1.40; 3.00 ⁇
  • the on-axis thickness of the fifth lens is d9
  • the on-axis distance from the image side surface of the fifth lens to the object side surface of the sixth lens is d10, and the following relationship is satisfied: 1.00 ⁇ d9/d10 ⁇ 30.00.
  • 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: 3.00 ⁇ (R7+R8)/(R7-R8) ⁇ 8.00 .
  • 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: -12.28 ⁇ (R1+R2)/(R1-R2) ⁇ -1.42; 0.05 ⁇ d1/TTL ⁇ 0.16.
  • the focal length of the second lens is f2
  • the radius of curvature of the object side of the second lens is R3
  • the radius of curvature of the image side of the second lens is R4, and the on-axis thickness of the second lens is d3
  • the total optical length of the camera optical lens is TTL, and satisfies the following relationship: -119.42 ⁇ f2/f ⁇ 158.82; -117.13 ⁇ (R3+R4)/(R3-R4) ⁇ 30.53; 0.02 ⁇ d3/TTL ⁇ 0.08.
  • 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: 0.22 ⁇ (R5+R6)/(R5-R6) ⁇ 1.08; 0.09 ⁇ d5/TTL ⁇ 0.27.
  • the focal length of the fourth lens is f4
  • the axial thickness of the fourth lens is d7
  • the total optical length of the imaging optical lens is TTL, and the following relationship is satisfied: -16.90 ⁇ f4/f ⁇ - 1.37; 0.02 ⁇ d7/TTL ⁇ 0.06.
  • the focal length of the fifth lens is f5
  • the radius of curvature of the object side of the fifth lens is R9
  • the radius of curvature of the image side of the fifth lens is R10
  • the on-axis thickness of the fifth lens is d9
  • the total optical length of the camera optical lens is TTL, and satisfies the following relationship: 0.59 ⁇ f5/f ⁇ 2.17; 0.90 ⁇ (R9+R10)/(R9-R10) ⁇ 5.34; 0.06 ⁇ d9/TTL ⁇ 0.20.
  • 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: -4.00 ⁇ f6/f ⁇ -0.92; 1.76 ⁇ (R11+R12)/(R11-R12) ⁇ 6.06; 0.02 ⁇ d11/TTL ⁇ 0.10.
  • the aperture F number of the imaging optical lens is FNO, and the following relational expression is satisfied: FNO ⁇ 2.27.
  • the imaging optical lens according to the present invention has good optical performance, high resolution, wide angle, and good imaging quality. It is especially suitable for high-pixel CCD, CMOS and other imaging elements. Mobile phone camera lens assembly and WEB camera lens.
  • FIG. 1 is a schematic diagram of the structure of an imaging optical lens according to a first embodiment of the present invention
  • Fig. 2 is a situation in which the RMS spot diameter of the imaging optical lens shown in Fig. 1 is in the first quadrant;
  • FIG. 3 is a schematic diagram of the structure of an imaging optical lens according to a second embodiment of the present invention.
  • Fig. 4 is a case where the RMS spot diameter of the imaging optical lens shown in Fig. 3 is in the first quadrant;
  • FIG. 5 is a schematic diagram of the structure of an imaging optical lens according to a third embodiment of the present invention.
  • Fig. 6 is a case where the RMS spot diameter of the imaging optical lens shown in Fig. 5 is in the first quadrant;
  • FIG. 7 is a schematic structural diagram of an imaging optical lens according to a fourth embodiment of the present invention.
  • FIG. 8 is a situation in which the RMS spot diameter of the imaging optical lens shown in FIG. 7 is in the first quadrant;
  • FIG. 9 is a schematic diagram of the structure of an imaging optical lens according to a fifth embodiment of the present invention.
  • FIG. 10 is a case where the RMS spot diameter of the imaging optical lens shown in FIG. 9 is in the first quadrant.
  • FIG. 1 shows an imaging optical lens 10 according to a first embodiment of the present invention.
  • the imaging optical lens 10 includes six 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.
  • An optical element such as an optical filter GF may be provided between the sixth lens L6 and the image plane Si.
  • the first lens L1 has negative refractive power
  • the third lens L3 has positive refractive power
  • the fourth lens L4 has negative refractive power
  • the fifth lens L5 has positive refractive power
  • the sixth lens L6 has negative refractive power.
  • the first lens L1 is made of plastic material
  • the second lens L2 is made of plastic material
  • the third lens L3 is made of glass material
  • the fourth lens L4 is made of plastic material
  • the fifth lens L5 is made of plastic material
  • the sixth lens L6 is made of plastic material.
  • At least one of the first lens L1 to the sixth lens L6 includes a free-form surface, and the free-form surface helps correct aberrations such as astigmatism, curvature of field, and distortion of the wide-angle optical system.
  • the focal length of the imaging optical lens 10 is defined as f, and the focal length of the third lens L3 is f3, which satisfies the following relationship: 0.80 ⁇ f3/f ⁇ 1.40, which specifies the ratio of the focal length of the third lens to the total focal length.
  • the range helps reduce aberrations and improve imaging quality. Preferably, 0.81 ⁇ f3/f ⁇ 1.39 is satisfied.
  • the focal length of the first lens L1 is defined as f1, which satisfies the following relationship: 3.00 ⁇
  • the on-axis thickness of the fifth lens L5 is defined as d9, and the on-axis distance from the image side surface of the fifth lens L5 to the object side surface of the sixth lens L6 is d10, which satisfies the following relationship: 1.00 ⁇ d9/d10 ⁇ 30.00, when d9/d10 meet the conditions, the total length of the system can be effectively compressed. Preferably, 1.56 ⁇ d9/d10 ⁇ 29.69 is satisfied.
  • the radius of curvature of the object side surface of the fourth lens L4 as R7
  • the radius of curvature of the image side surface of the fourth lens L4 as R8, satisfying the following relationship: 3.00 ⁇ (R7+R8)/(R7-R8) ⁇ 8.00
  • the shape of the fourth lens is specified, and the lens that meets the conditions is beneficial to reduce the degree of light deflection and the sensitivity of the lens. Preferably, it satisfies 3.19 ⁇ (R7+R8)/(R7-R8) ⁇ 7.81.
  • the curvature radius of the object side surface of the first lens L1 as R1
  • the curvature radius of the image side surface of the first lens L1 as R2
  • R1 the curvature radius of the image side surface of the first lens L1
  • R2 which satisfies the following relationship: -12.28 ⁇ (R1+R2)/(R1-R2) ⁇ - 1.42.
  • it satisfies -7.68 ⁇ (R1+R2)/(R1-R2) ⁇ -1.77.
  • the axial thickness of the first lens L1 is d1
  • the total optical length of the imaging optical lens 10 is TTL, which satisfies the following relationship: 0.05 ⁇ d1/TTL ⁇ 0.16, which is beneficial to realize ultra-thinness.
  • 0.08 ⁇ d1/TTL ⁇ 0.13 is satisfied.
  • the focal length of the second lens L2 is defined as f2, and the focal length of the imaging optical lens 10 is f, which satisfies the following relationship: -119.42 ⁇ f2/f ⁇ 158.82, by controlling the optical power of the second lens L2 to be reasonable
  • the range is conducive to correcting the aberration of the optical system.
  • -74.64 ⁇ f2/f ⁇ 127.05 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: -117.13 ⁇ (R3+R4)/(R3-R4) ⁇ 30.53,
  • the shape of the second lens L2 is specified. When it is within the range, as the lens develops toward ultra-thin and wide-angle, it is beneficial to correct the problem of axial chromatic aberration. Preferably, it satisfies -73.21 ⁇ (R3+R4)/(R3- R4) ⁇ 24.42.
  • the on-axis thickness of the second lens L2 is d3, and the total optical length of the imaging optical lens 10 is TTL, which satisfies the following relationship: 0.02 ⁇ d3/TTL ⁇ 0.08, which is beneficial to achieve ultra-thinness.
  • 0.03 ⁇ d3/TTL ⁇ 0.06 is satisfied.
  • the curvature radius of the object side surface of the third lens L3 as R5
  • the curvature radius of the image side surface of the third lens L3 as R6, which satisfies the following relationship: 0.22 ⁇ (R5+R6)/(R5-R6) ⁇ 1.08, which is effective
  • Controlling the shape of the third lens L3 facilitates the molding of the third lens L3.
  • the degree of deflection of the light passing through the lens can be eased, and aberrations can be effectively reduced.
  • 0.35 ⁇ (R5+R6)/(R5-R6) ⁇ 0.87 is satisfied.
  • the axial thickness of the third lens L3 is d5, and the total optical length of the imaging optical lens 10 is TTL, which satisfies the following relationship: 0.09 ⁇ d5/TTL ⁇ 0.27, which is conducive to achieving ultra-thinness.
  • 0.14 ⁇ d5/TTL ⁇ 0.22 is satisfied.
  • the focal length of the fourth lens is defined as f4, and the focal length of the imaging optical lens 10 is f, which satisfies the following relationship: -16.90 ⁇ f4/f ⁇ -1.37.
  • the reasonable distribution of optical power makes the system better High imaging quality and low sensitivity.
  • -10.56 ⁇ f4/f ⁇ -1.72 is satisfied.
  • the axial thickness of the fourth lens L4 is d7, and the total optical length of the imaging optical lens 10 is TTL, which satisfies the following relationship: 0.02 ⁇ d7/TTL ⁇ 0.06, which is beneficial to realize ultra-thinness. Preferably, 0.03 ⁇ d7/TTL ⁇ 0.04 is satisfied.
  • the focal length of the fifth lens L5 is defined as f5, the focal length of the imaging optical lens 10 is f, and the following relationship is satisfied: 0.59 ⁇ f5/f ⁇ 2.17.
  • the limitation on the fifth lens L5 can effectively make the imaging lens
  • the light angle is gentle, reducing tolerance sensitivity.
  • 0.95 ⁇ f5/f ⁇ 1.74 is satisfied.
  • the radius of curvature of the object side surface of the fifth lens is R9
  • the radius of curvature of the image side surface of the fifth lens is R10
  • the following relationship is satisfied: 0.90 ⁇ (R9+R10)/(R9-R10) ⁇ 5.34, which is specified
  • the shape of the fifth lens L5 is within the range, with the development of ultra-thin and wide-angle, it is beneficial to correct the aberration of the off-axis angle of view.
  • 1.44 ⁇ (R9+R10)/(R9-R10) ⁇ 4.27 is satisfied.
  • the axial thickness of the fifth lens L5 is d9, and the total optical length of the imaging optical lens 10 is TTL, which satisfies the following relationship: 0.06 ⁇ d9/TTL ⁇ 0.20, which is beneficial to realize ultra-thinness.
  • 0.09 ⁇ d9/TTL ⁇ 0.16 is satisfied.
  • the focal length of the sixth lens L6 is defined as f6, and the focal length of the imaging optical lens 10 is f, which satisfies the following relationship: -4.00 ⁇ f6/f ⁇ -0.92.
  • the system has a relatively high Good imaging quality and low sensitivity.
  • it satisfies -2.50 ⁇ f6/f ⁇ -1.16.
  • the radius of curvature of the object side surface of the sixth lens is R11
  • the radius of curvature of the image side surface of the sixth lens is R12, which satisfies the following relationship: 1.76 ⁇ (R11+R12)/(R11-R12) ⁇ 6.06, which is
  • the shape of the sixth 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.
  • 2.81 ⁇ (R11+R12)/(R11-R12) ⁇ 4.85 is satisfied.
  • the axial thickness of the sixth lens L6 is d11, and the total optical length of the imaging optical lens 10 is TTL, which satisfies the following relationship: 0.02 ⁇ d11/TTL ⁇ 0.10, which is beneficial to realize ultra-thinness.
  • 0.04 ⁇ d11/TTL ⁇ 0.08 is satisfied.
  • the aperture F number of the imaging optical lens 10 is FNO, and satisfies the following relationship: FNO ⁇ 2.27, large aperture, good imaging performance.
  • the total optical length TTL of the imaging optical lens 10 is less than or equal to 7.05 mm, which is beneficial to realize ultra-thinness.
  • the total optical length TTL is less than or equal to 6.73 mm.
  • the imaging optical lens 10 has good optical performance while adopting a free-form surface, which can match the design image area with the actual use area, and maximize the image quality of the effective area; according to the characteristics of the optical lens 10
  • the optical lens 10 is particularly suitable for mobile phone camera lens assemblies and WEB camera lenses composed of high-resolution CCD, CMOS, and other imaging elements.
  • the imaging optical lens 10 of the present invention will be described below with an example.
  • the symbols described in each example are as follows.
  • the unit of focal length, on-axis distance, radius of curvature, and on-axis thickness 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;
  • Table 1 and Table 2 show design data of the imaging optical lens 10 according to the first embodiment of the present invention.
  • the object side surface and the image side surface of the first lens L1 are free-form surfaces.
  • 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;
  • 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 optical filter GF;
  • d14 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;
  • 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 are the aspherical coefficients
  • r is the vertical distance between the point on the aspherical curve and the optical axis
  • z is the aspherical depth (the distance from the aspherical surface to the optical axis is The vertical distance between the point of r and the tangent plane tangent to the vertex on the optical axis of the aspherical surface).
  • 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 shows free-form surface data in the imaging optical lens 10 of the first embodiment of the present invention.
  • k is the conic coefficient
  • Bi is the free-form surface coefficient
  • r is the vertical distance between the point on the free-form surface and the optical axis
  • x is the x-direction component of r
  • y is the y-direction component of r
  • z is the aspheric depth (aspherical surface The vertical distance between the point at the upper distance of r from the optical axis and the tangent plane tangent to the vertex on the aspheric optical axis).
  • each free-form surface uses the extended polynomial surface type (Extended Polynomial) shown in the above formula (2).
  • extended Polynomial Extended Polynomial
  • the present invention is not limited to the free-form surface polynomial form expressed by the formula (2).
  • FIG. 2 shows a situation where the RMS spot diameter of the imaging optical lens 10 of the first embodiment is within the first quadrant. According to FIG. 2, it can be seen that the imaging optical lens 10 of the first embodiment can achieve good imaging quality.
  • Table 16 shows the values corresponding to the various values in each of Examples 1, 2, 3, 4, and 5 and the parameters that have been specified in the conditional expressions.
  • the first embodiment satisfies various conditional expressions.
  • the entrance pupil diameter ENPD of the imaging optical lens is 0.956mm
  • the full-field image height (diagonal direction) IH is 6.720mm
  • the image height in the x direction is 5.376mm
  • the image height in the y direction is 4.032. mm
  • the imaging effect is best in this rectangular range.
  • the diagonal FOV is 118.47°
  • the x-direction is 106.70°
  • the y-direction is 90.46°
  • wide-angle, ultra-thin The on-axis and off-axis chromatic aberrations are fully corrected, and it 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 4 and Table 5 show design data of the imaging optical lens 20 according to the second embodiment of the present invention.
  • Table 5 shows the aspheric surface data of each lens in the imaging optical lens 20 according to the second embodiment of the present invention.
  • Table 6 shows free-form surface data in the imaging optical lens 20 according to the second embodiment of the present invention.
  • FIG. 4 shows a situation where the RMS spot diameter of the imaging optical lens 20 of the second embodiment is within the first quadrant. According to FIG. 4, it can be seen that the imaging optical lens 20 of the second embodiment can achieve good imaging quality.
  • the second embodiment satisfies various conditional expressions.
  • the entrance pupil diameter ENPD of the imaging optical lens is 1.1085mm
  • the full-field image height (diagonal direction) IH is 7.580mm
  • the image height in the x direction is 6.064mm
  • the image height in the y direction is 4.548. mm
  • the imaging effect is best in this rectangular range
  • the diagonal FOV is 118.47°
  • the x-direction is 106.70°
  • the y-direction is 90.46°
  • wide-angle, ultra-thin The on-axis and off-axis chromatic aberrations are fully corrected, and it 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.
  • Tables 7 and 8 show design data of the imaging optical lens 30 according to the third embodiment of the present invention.
  • Table 8 shows the aspheric surface data of each lens in the imaging optical lens 30 according to the third embodiment of the present invention.
  • Table 9 shows free-form surface data in the imaging optical lens 30 of the third embodiment of the present invention.
  • FIG. 6 shows a situation in which the RMS spot diameter of the imaging optical lens 30 of the third embodiment is within the first quadrant. According to FIG. 6, it can be seen that the imaging optical lens 30 of the third embodiment can achieve good imaging quality.
  • the entrance pupil diameter ENPD of the imaging optical lens is 0.987mm
  • the full-field image height (diagonal direction) IH is 7.140mm
  • the image height in the x direction is 5.712mm
  • the image height in the y direction is 4.284. mm
  • the imaging effect is best in this rectangular range
  • the diagonal FOV is 118.47°
  • the x-direction is 106.70°
  • the y-direction is 90.46°
  • wide-angle, ultra-thin The on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.
  • the fourth 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 10 and Table 11 show design data of the imaging optical lens 40 according to the fourth embodiment of the present invention.
  • the object side surface and the image side surface of the second lens L2 are free-form surfaces.
  • Table 11 shows the aspheric surface data of each lens in the imaging optical lens 40 according to the fourth embodiment of the present invention.
  • Table 12 shows free-form surface data in the imaging optical lens 40 of the fourth embodiment of the present invention.
  • FIG. 8 shows a situation where the RMS spot diameter of the imaging optical lens 40 of the fourth embodiment is within the first quadrant. According to FIG. 8, it can be seen that the imaging optical lens 40 of the fourth embodiment can achieve good imaging quality.
  • the entrance pupil diameter ENPD of the imaging optical lens is 0.9466mm
  • the full-field image height (diagonal direction) IH is 6.720mm
  • the image height in the x direction is 5.376mm
  • the image height in the y direction is 4.032. mm
  • the imaging effect is best in this rectangular range
  • the diagonal FOV is 118.78°
  • the x-direction is 107.03°
  • the y-direction is 90.80°
  • wide-angle, ultra-thin The on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.
  • the fifth 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 13 and Table 14 show design data of the imaging optical lens 50 of the fifth embodiment of the present invention.
  • the object side surface and the image side surface of the third lens L3 are free-form surfaces.
  • Table 14 shows the aspheric surface data of each lens in the imaging optical lens 50 according to the fifth embodiment of the present invention.
  • Table 15 shows free-form surface data in the imaging optical lens 50 of the fifth embodiment of the present invention.
  • FIG. 10 shows a situation where the RMS spot diameter of the imaging optical lens 50 of the fourth embodiment is within the first quadrant. According to FIG. 10, it can be seen that the imaging optical lens 50 of the fifth embodiment can achieve good imaging quality.
  • the entrance pupil diameter ENPD of the imaging optical lens is 0.949mm
  • the full-field image height (diagonal direction) IH is 6.700mm
  • the image height in the x direction is 5.360mm
  • the image height in the y direction is 4.020. mm
  • the imaging effect is best in this rectangular range
  • the diagonal FOV is 118.47°
  • the x-direction is 106.70°
  • the y-direction is 90.46°
  • wide-angle, ultra-thin The on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.
  • Example 1 Example 2
  • Example 3 Example 4
  • Example 5 f3/f 0.97 0.81 1.37 0.95 0.94
  • Fno is the aperture F number of the imaging optical lens.

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Abstract

L'invention concerne une lentille optique de caméra (10), qui comprend, dans l'ordre du côté objet au côté image : une première lentille (L1) qui a une réfringence négative, une deuxième lentille (L2) qui a une réfringence positive, une troisième lentille (L3) qui a une réfringence positive, une quatrième lentille (L4) qui a une réfringence négative, une cinquième lentille (L5) et une sixième lentille (L6), au moins l'une de la première lentille (L1) à la sixième lentille (L6) ayant une surface de forme libre ; la distance focale de la lentille optique de caméra (10) est f ; la distance focale de la première lentille (L1) est f1 ; la distance focale de la troisième lentille (L3) est f3, et les relations suivantes sont satisfaites : 0,80≤f3/f≤1,40 ; et 3,00≤|f1/f|. La lentille optique de caméra (10) satisfait les exigences de conception d'un grand angle et d'une ultra-minceur tout en ayant une bonne performance optique.
PCT/CN2019/130160 2019-12-30 2019-12-30 Lentille optique de caméra WO2021134330A1 (fr)

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