WO2021128190A1 - 摄像光学镜头 - Google Patents

摄像光学镜头 Download PDF

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Publication number
WO2021128190A1
WO2021128190A1 PCT/CN2019/128810 CN2019128810W WO2021128190A1 WO 2021128190 A1 WO2021128190 A1 WO 2021128190A1 CN 2019128810 W CN2019128810 W CN 2019128810W WO 2021128190 A1 WO2021128190 A1 WO 2021128190A1
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Prior art keywords
lens
imaging optical
optical lens
ttl
curvature
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PCT/CN2019/128810
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English (en)
French (fr)
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生沼健司
张磊
崔元善
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诚瑞光学(常州)股份有限公司
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Priority to PCT/CN2019/128810 priority Critical patent/WO2021128190A1/zh
Publication of WO2021128190A1 publication Critical patent/WO2021128190A1/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 coupling devices (Charge Coupled Device, CCD) or complementary metal oxide semiconductor devices (Complementary Metal).
  • CCD Charge Coupled Device
  • CMOS Sensor complementary metal oxide semiconductor devices
  • the pixel size of photosensitive devices has been reduced, and nowadays electronic products are developed with good functions, thin and short appearance, so they have
  • 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.
  • 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 with negative refractive power, and a first lens with positive refractive power.
  • the focal length of one lens is f1
  • the focal length of the third lens is f3
  • 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 dispersion of the second lens The coefficient is v2, and the dispersion coefficient of the fourth lens is v4, which satisfies the following relationship: 100.00° ⁇ FOV ⁇ 135.00°; -3.00 ⁇ f1/f3 ⁇ -1.00; -20.00 ⁇ R9/R10 ⁇ -1.00;
  • the object side surface of the first lens is concave on the paraxial;
  • the focal length of the imaging optical lens is f
  • 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: -4.96 ⁇ f1/f ⁇ -1.14; -5.42 ⁇ (R1+R2 )/(R1-R2) ⁇ 1.05; 0.02 ⁇ d1/TTL ⁇ 0.15.
  • the imaging optical lens satisfies the following relationship: -3.10 ⁇ f1/f ⁇ -1.43; -3.99 ⁇ (R1+R2)/(R1-R2) ⁇ 0.84; 0.04 ⁇ d1/TTL ⁇ 0.12.
  • the object side surface of the second lens is convex on the par axis, and the image side surface is concave on the par axis;
  • the focal length of the imaging optical lens is f
  • the focal length of the second lens is f2
  • the second lens The curvature radius of the object side of the lens is R3, the curvature radius 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 imaging optical lens is TTL, and the following relationship is satisfied Formula: 2.75 ⁇ f2/f ⁇ 332.36; -122.01 ⁇ (R3+R4)/(R3-R4) ⁇ 46.02; 0.02 ⁇ d3/TTL ⁇ 0.08.
  • the imaging optical lens satisfies the following relationship: 4.41 ⁇ f2/f ⁇ 265.89; -76.26 ⁇ (R3+R4)/(R3-R4) ⁇ 36.82; 0.04 ⁇ d3/TTL ⁇ 0.07.
  • the object side of the third lens is convex on the paraxial axis, and the image side is convex on the paraxial;
  • the focal length of the imaging optical lens is f
  • the radius of curvature of the object side of the third lens is R5, so
  • the curvature radius 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 the following relationship is satisfied: 0.39 ⁇ f3/f ⁇ 1.90; -0.48 ⁇ (R5+R6)/(R5-R6) ⁇ 0.62; 0.05 ⁇ d5/TTL ⁇ 0.22.
  • the imaging optical lens satisfies the following relationship: 0.63 ⁇ f3/f ⁇ 1.52; -0.30 ⁇ (R5+R6)/(R5-R6) ⁇ 0.49; 0.08 ⁇ d5/TTL ⁇ 0.18.
  • the focal length of the imaging optical lens is f
  • the focal length of the fourth lens is f4
  • the radius of curvature of the object side of the fourth lens is R7
  • the radius of curvature of the image side of the fourth lens is R8, and
  • the axial thickness of the fourth lens is d7
  • the total optical length of the imaging optical lens is TTL, and satisfies the following relationship: -179.24 ⁇ f4/f ⁇ -1.44; -4.58 ⁇ (R7+R8)/(R7 -R8) ⁇ 52.64; 0.02 ⁇ d7/TTL ⁇ 0.08.
  • the imaging optical lens satisfies the following relationship: -112.03 ⁇ f4/f ⁇ -1.80; -2.86 ⁇ (R7+R8)/(R7-R8) ⁇ 42.11; 0.03 ⁇ d7/TTL ⁇ 0.06.
  • the focal length of the imaging optical lens is f
  • the focal length of the fifth lens is f5
  • the axial thickness of the fifth lens is d9
  • the total optical length of the imaging optical lens is TTL, and the following Relational formula: -4.78 ⁇ f5/f ⁇ 5.40; 0.00 ⁇ (R9+R10)/(R9-R10) ⁇ 1.36; 0.03 ⁇ d9/TTL ⁇ 0.14.
  • the imaging optical lens satisfies the following relationship: -2.99 ⁇ f5/f ⁇ 4.32; 0.00 ⁇ (R9+R10)/(R9-R10) ⁇ 1.09; 0.05 ⁇ d9/TTL ⁇ 0.11.
  • the focal length of the imaging optical lens is f
  • 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
  • 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: -56.82 ⁇ f6/f ⁇ 1.12; 0.36 ⁇ (R11+R12)/(R11-R12 ) ⁇ 16.59; 0.02 ⁇ d11/TTL ⁇ 0.23.
  • the imaging optical lens satisfies the following relationship: -35.51 ⁇ f6/f ⁇ 0.89; 0.58 ⁇ (R11+R12)/(R11-R12) ⁇ 13.27; 0.03 ⁇ d11/TTL ⁇ 0.19.
  • the image side of the seventh lens is concave on the paraxial; the focal length of the imaging optical lens is f, the focal length of the seventh lens is f7, and the radius of curvature of the object side of the seventh lens is R13, The curvature radius of the image side surface of the seventh lens is R14, and the axial thickness of the seventh lens is d13, the total optical length of the imaging optical lens is TTL, and the following relationship is satisfied: -2.18 ⁇ f7/f ⁇ 267.30; 0.21 ⁇ (R13+R14)/(R13-R14) ⁇ 14.55; 0.03 ⁇ d13/TTL ⁇ 0.27.
  • the imaging optical lens satisfies the following relationship: -1.36 ⁇ f7/f ⁇ 213.84; 0.34 ⁇ (R13+R14)/(R13-R14) ⁇ 11.64; 0.06 ⁇ d13/TTL ⁇ 0.22.
  • the total optical length TTL of the imaging optical lens is less than or equal to 7.71 mm.
  • the total optical length TTL of the imaging optical lens is less than or equal to 7.36 mm.
  • the aperture F number of the imaging optical lens is less than or equal to 2.88.
  • the aperture F number of the imaging optical lens is less than or equal to 2.83.
  • the imaging optical lens according to the present invention has excellent optical characteristics, is ultra-thin, wide-angle and fully compensated for chromatic aberration, and is especially suitable for mobile phone camera lenses composed of high-pixel CCD, CMOS and other imaging elements. Components 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. 13 is a schematic diagram of the structure of an imaging optical lens according to a fourth embodiment of the present invention.
  • FIG. 14 is a schematic diagram of axial aberration of the imaging optical lens shown in FIG. 13;
  • FIG. 15 is a schematic diagram of the chromatic aberration of magnification of the imaging optical lens shown in FIG. 13;
  • FIG. 16 is a schematic diagram of field curvature and distortion of the imaging optical lens shown in FIG. 13.
  • 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: 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 and seventh lens L7.
  • An optical element such as an optical filter GF may be provided on the image side of the seventh lens L7.
  • the first lens L1 is made of plastic
  • the second lens L2 is made of plastic
  • the third lens L3 is made of plastic
  • the fourth lens L4 is made of plastic
  • the fifth lens L5 is made of plastic
  • the sixth lens L6 is made of plastic
  • the seventh lens is made of plastic.
  • the lens L7 is made of plastic.
  • the maximum field of view of the overall camera optical lens 10 is defined as FOV, 100.00° ⁇ FOV ⁇ 135.00°, and the maximum field of view of the camera optical lens 10 is specified. Within the range, ultra-wide-angle photography can be achieved and user experience can be improved. Preferably, it satisfies 100.12° ⁇ FOV ⁇ 134.98°.
  • the focal length of the first lens L1 as f1
  • the focal length of the third lens L3 as f3, -3.00 ⁇ f1/f3 ⁇ -1.00, which specifies the ratio of the focal length f1 of the first lens L1 to the focal length f3 of the third lens L3, which can be Effectively reduce the sensitivity of the optical lens group for imaging, and further improve the image quality.
  • it satisfies -3.00 ⁇ f1/f3 ⁇ -1.18.
  • the radius of curvature of the object side surface of the fifth lens L5 as R9
  • the radius of curvature of the image side surface of the fifth lens L5 is R10, -20.00 ⁇ R9/R10 ⁇ -1.00
  • the shape of the fifth lens L5 is specified.
  • it is helpful to correct the aberration of the off-axis angle of view.
  • it satisfies -19.99 ⁇ R9/R10 ⁇ -1.00.
  • the dispersion coefficient of the second lens L2 is v2
  • the dispersion coefficient of the fourth lens L4 is v4, 5.00 ⁇ v2-v4 ⁇ 20.00, which specifies the difference between the dispersion coefficients of the second lens and the fourth lens, within the range , Can effectively correct the dispersion of the camera optical lens, improve the sharpness of the camera, close to the true color of the subject, and improve the image quality.
  • it satisfies 5.20 ⁇ v2-v4 ⁇ 19.61.
  • 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 refractive index of the relevant lens, the total optical length of the imaging optical lens, the axial thickness and the radius of curvature satisfy the above-mentioned relational expressions, the imaging optical lens 10 can be made to have a high Performance, and meet the design requirements of low TTL.
  • the object side surface of the first lens L1 is concave at the paraxial position and has a negative refractive power.
  • the focal length of the imaging optical lens 10 is f, which satisfies the following relationship: -4.96 ⁇ f1/f ⁇ -1.14, which specifies the ratio of the focal length of the first lens L1 to the overall focal length.
  • the first lens has an appropriate negative refractive power, which is conducive to reducing system aberrations and at the same time conducive to the development of ultra-thin and wide-angle lenses.
  • it satisfies -3.10 ⁇ f1/f ⁇ -1.43.
  • 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: -5.42 ⁇ (R1+R2)/(R1-R2) ⁇ 1.05, reasonable control of the first lens L1
  • the shape of the first lens L1 can effectively correct the spherical aberration of the system. Preferably, it satisfies -3.39 ⁇ (R1+R2)/(R1-R2) ⁇ 0.84.
  • 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: 0.02 ⁇ d1/TTL ⁇ 0.15, which is conducive to achieving ultra-thinness.
  • the object side surface of the second lens L2 is convex at the paraxial position, and the image side surface is concave at the paraxial position, and has positive refractive power.
  • the focal length f2 of the second lens L2 satisfies the following relationship: 2.75 ⁇ f2/f ⁇ 332.36.
  • it is beneficial to correct the aberration of the optical system Preferably, 4.41 ⁇ f2/f ⁇ 265.89.
  • the curvature radius of the object side of the second lens L2 is R3, and the curvature radius of the image side of the second lens L2 is R4, which satisfies the following relationship: -122.01 ⁇ (R3+R4)/(R3-R4) ⁇ 46.02, which specifies the second
  • -122.01 ⁇ (R3+R4)/(R3-R4) ⁇ 46.02 which specifies the second
  • the on-axis thickness of the second lens L2 is d3, which satisfies the following relationship: 0.02 ⁇ d3/TTL ⁇ 0.08, which is beneficial to realize ultra-thinness.
  • the object side surface of the third lens L3 is convex at the paraxial position, and the image side surface is convex at the paraxial position, and has positive refractive power.
  • the focal length f3 of the third lens L3 satisfies the following relational expression: 0.39 ⁇ f3/f ⁇ 1.90.
  • the reasonable distribution of optical power enables the system to have better imaging quality and lower sensitivity.
  • the curvature radius R5 of the object side surface of the third lens L3 and the curvature radius R6 of the image side surface of the third lens L3 satisfy the following relationship: -0.48 ⁇ (R5+R6)/(R5-R6) ⁇ 0.62, which can effectively control the third lens
  • the shape of L3 is conducive to 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.
  • the on-axis thickness of the third lens L3 is d5, which satisfies the following relationship: 0.05 ⁇ d5/TTL ⁇ 0.22, which is beneficial to realize ultra-thinness.
  • the fourth lens L4 has a negative refractive power.
  • the focal length of the fourth lens L4 is f4, which satisfies the following relationship: -179.24 ⁇ f4/f ⁇ -1.44.
  • the reasonable distribution of optical power enables the system to have better imaging quality and lower sensitivity.
  • the curvature radius R7 of the object side surface of the fourth lens L4 and the curvature radius R8 of the image side surface of the fourth lens L4 satisfy the following relationship: -4.58 ⁇ (R7+R8)/(R7-R8) ⁇ 52.64, the fourth lens is specified
  • the shape of L4 is within the range, with the development of ultra-thin and wide-angle, it is easy to correct problems such as the aberration of the off-axis angle of view.
  • the on-axis thickness of the fourth lens L4 is d7, which satisfies the following relationship: 0.02 ⁇ d7/TTL ⁇ 0.08, which is beneficial to realize ultra-thinness.
  • the focal length f5 of the fifth lens L5 satisfies the following relationship: -4.78 ⁇ f5/f ⁇ 5.40, and the limitation of the fifth lens L5 can effectively smooth the light angle of the imaging lens and reduce the tolerance sensitivity.
  • -4.78 ⁇ f5/f ⁇ 5.40 Preferably, -2.99 ⁇ f5/f ⁇ 4.32.
  • 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: 0.00 ⁇ (R9+R10)/(R9-R10) ⁇ 1.36, and the fifth lens L5 is specified
  • the on-axis thickness of the fifth lens L5 is d9, which satisfies the following relationship: 0.03 ⁇ d9/TTL ⁇ 0.14, which is beneficial to realize ultra-thinness.
  • the object side surface of the sixth lens L6 is convex at the paraxial position, and the image side surface is concave at the paraxial position, and has a negative refractive power.
  • the focal length f6 of the sixth lens L6 satisfies the following relational expression: -56.82 ⁇ f6/f ⁇ 1.12.
  • the system has better imaging quality and lower sensitivity.
  • 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: 0.36 ⁇ (R11+R12)/(R11-R12) ⁇ 16.59, the sixth 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.
  • the on-axis thickness of the sixth lens L6 is d11, which satisfies the following relationship: 0.02 ⁇ d11/TTL ⁇ 0.23, which is beneficial to realize ultra-thinness.
  • the image side surface of the seventh lens L7 is concave at the paraxial position.
  • the focal length f7 of the seventh lens L7 satisfies the following relational expression: -2.18 ⁇ f7/f ⁇ 267.30.
  • the system has better imaging quality and lower sensitivity.
  • the curvature radius of the seventh lens L7 is R13 and the curvature radius of the image side of the seventh lens L7 is R14, which satisfies the following relationship: 0.21 ⁇ (R13+R14)/(R13-R14) ⁇ 14.55, which is the seventh
  • R13+R14 curvature radius of the image side of the seventh lens L7
  • R14 curvature radius of the image side of the seventh lens L7
  • 0.21 ⁇ (R13+R14)/(R13-R14) ⁇ 14.55 which is the seventh
  • the on-axis thickness of the seventh lens L7 is d13, which satisfies the following relationship: 0.03 ⁇ d13/TTL ⁇ 0.27, which is beneficial to realize ultra-thinness.
  • the total optical length TTL of the imaging optical lens 10 is less than or equal to 7.71 millimeters, which is beneficial to achieve ultra-thinness.
  • the total optical length TTL of the imaging optical lens 10 is less than or equal to 7.36 mm.
  • the aperture F number of the imaging optical lens 10 is less than or equal to 2.88. Large aperture, good imaging performance. Preferably, the aperture F number of the imaging optical lens 10 is less than or equal to 2.83.
  • 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 focal length of the imaging optical lens 10 is f
  • the combined focal length of the first lens L1 and the second lens L2 is f12
  • the following relationship is satisfied: -9.15 ⁇ f12/f ⁇ -1.17 .
  • the aberration and distortion of the imaging optical lens can be eliminated, and the back focal length of the imaging optical lens can be suppressed, and the miniaturization of the imaging lens system group 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 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 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.
  • 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 17 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 each conditional expression.
  • the entrance pupil diameter of the imaging optical lens is 2.085mm
  • the full-field image height is 3.25mm
  • the maximum field of view of the imaging optical lens is 100.24°, wide-angle, ultra-thin, and 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. Only the differences are listed below:
  • the seventh lens L7 is made of glass.
  • 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.
  • k is the conic coefficient
  • A4, A6, A8, A10, A12, A14, A16 are aspherical coefficients.
  • the aspheric surface of each lens surface uses the aspheric surface shown in the above formula (2).
  • the present invention is not limited to the aspheric polynomial form represented by the formula (2).
  • 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.
  • G7R1 and G7R2 respectively represent the object side surface and the image side surface of the seventh lens L7.
  • FIG. 6 and 7 respectively show schematic diagrams of axial aberration and chromatic aberration of magnification after light having wavelengths of 470 nm, 555 nm, and 650 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 1.002mm
  • the full-field image height is 3.25mm
  • the maximum field of view of the imaging optical lens is 108.18°
  • wide-angle wide-angle
  • ultra-thin and its axis and axis
  • the external chromatic aberration is fully corrected and has excellent optical characteristics.
  • the third embodiment is basically the same as the first embodiment, and the meaning of the symbols is the same as that of the first embodiment, and only the differences are listed below.
  • the first lens L1 is made of plastic
  • the second lens L2 is made of glass
  • the third lens L3 is made of plastic
  • the fourth lens L4 is made of plastic
  • the fifth lens L5 is made of plastic
  • the sixth lens L6 is made of The seventh lens L7 is made of plastic material.
  • 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.
  • G2R1 and G2R2 respectively represent the object side surface and the image side surface of the second lens L2.
  • FIG. 10 and 11 respectively show schematic diagrams of axial aberration and chromatic aberration of magnification after light having wavelengths of 470 nm, 555 nm, and 650 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.
  • Table 17 lists the numerical values corresponding to each conditional expression in this embodiment according to the above-mentioned conditional expressions. Obviously, the imaging optical system of this embodiment satisfies the above-mentioned conditional expressions.
  • the entrance pupil diameter of the imaging optical lens is 0.878mm
  • the full-field image height is 3.25mm
  • the maximum field of view of the imaging optical lens is 134.95°, wide-angle, ultra-thin, and its axis and axis
  • the external chromatic aberration is fully corrected and has excellent optical characteristics.
  • the fourth embodiment is basically the same as the third embodiment, and the meaning of the symbols is the same as the third embodiment, and only the differences are listed below.
  • the first lens L1 is made of plastic
  • the second lens L2 is made of glass
  • the third lens L3 is made of plastic
  • the fourth lens L4 is made of plastic
  • the fifth lens L5 is made of plastic
  • the sixth lens L6 is made of The seventh lens L7 is made of plastic material.
  • Table 13 and Table 14 show design data of the imaging optical lens 40 according to the fourth embodiment of the present invention.
  • Table 14 shows the aspheric surface data of each lens in the imaging optical lens 40 according to the fourth embodiment of the present invention.
  • Table 15 and Table 16 show the inflection point and stagnation point design data of each lens in the imaging optical lens 40 according to the fourth embodiment of the present invention.
  • FIG. 14 and 15 respectively show schematic diagrams of axial aberration and chromatic aberration of magnification after light having wavelengths of 470 nm, 555 nm, and 650 nm pass through the imaging optical lens 40 of the fourth embodiment.
  • FIG. 16 shows a schematic diagram of field curvature and distortion after light with a wavelength of 555 nm passes through the imaging optical lens 40 of the fourth embodiment.
  • the fourth embodiment satisfies various conditional expressions.
  • the entrance pupil diameter of the imaging optical lens is 0.856mm
  • the full-field image height is 3.25mm
  • the maximum field of view of the imaging optical lens is 131.21°, wide-angle, ultra-thin, and its axis and axis
  • the external chromatic aberration is fully corrected and has excellent optical characteristics.
  • Example 1 Example 2
  • Example 3 Example 4 f 3.541 2.806 2.372 2.396
  • FNO is the aperture F number of the imaging optical lens.

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Abstract

一种摄像光学镜头（10），该摄像光学镜头（10）自物侧至像侧依序包含：具有负屈折力的第一透镜（L1），具有正屈折力的第二透镜（L2），具有正屈折力的第三透镜（L3），具有负屈折力的第四透镜（L4），第五透镜（L5），第六透镜（L6），以及第七透镜（L7）；且满足下列关系式：100.00°≤FOV≤135.00°；-3.00≤f1/f1≤-1.00；-20.00≤R9/R10≤-1.00；5.00≤v2-v4≤20.00。该摄像光学镜头（10）能获得高成像性能的同时，获得低TTL。

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、七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、超薄且色像差充分补正的广角摄像镜头。
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：具有负屈折力的第一透镜，具有正屈折力的第二透镜，具有正屈折力的第三透镜，具有负屈折力的第四透镜，第五透镜，第六透镜，以及第七透镜；所述摄像光学镜头的最大视场角为FOV，所述第一透镜的焦距为f1，所述第三透镜的焦距为f3，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，所述第二透镜的色散系数为v2，所述第四透镜的色散系数为v4，满足下列关系式：100.00°≤FOV≤135.00°；-3.00≤f1/f3≤-1.00；-20.00≤R9/R10≤-1.00；5.00≤v2-v4≤20.00。
优选的，所述第一透镜的物侧面于近轴为凹面；所述摄像光学镜头的焦距为f，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，以及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：-4.96≤f1/f≤-1.14；-5.42≤(R1+R2)/(R1-R2)≤1.05；0.02≤d1/TTL≤0.15。
优选的，所述摄像光学镜头满足下列关系式：-3.10≤f1/f≤-1.43；-3.39≤(R1+R2)/(R1-R2)≤0.84；0.04≤d1/TTL≤0.12。
优选的，所述第二透镜的物侧面于近轴为凸面，其像侧面于近轴为凹面；所述摄像光学镜头的焦距为f，所述第二透镜的焦距为f2，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，以及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：2.75≤f2/f≤332.36；-122.01≤(R3+R4)/(R3-R4)≤46.02；0.02≤d3/TTL≤0.08。
优选的，所述摄像光学镜头满足下列关系式：4.41≤f2/f≤265.89；-76.26≤(R3+R4)/(R3-R4)≤36.82；0.04≤d3/TTL≤0.07。
优选的，所述第三透镜的物侧面于近轴为凸面，其像侧面于近轴为凸面；所述摄像光学镜头的焦距为f，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，以及所述第三透镜的轴上厚度为d5，所述摄像光学镜头的光学总长为TTL，且满足下列关系式：0.39≤f3/f≤1.90；-0.48≤(R5+R6)/(R5-R6)≤0.62；0.05≤d5/TTL≤0.22。
优选的，所述摄像光学镜头满足下列关系式：0.63≤f3/f≤1.52；-0.30≤(R5+R6)/(R5-R6)≤0.49；0.08≤d5/TTL≤0.18。
优选的，所述摄像光学镜头的焦距为f，所述第四透镜的焦距为f4，所述第四透镜物侧面的曲率半径为R7，所述第四透镜像侧面的曲率半径为R8，以及所述第四透镜的轴上厚度为d7，所述摄像光学镜头的光学总长为TTL，且满足下列关系式：-179.24≤f4/f≤-1.44；-4.58≤(R7+R8)/(R7-R8)≤52.64；0.02≤d7/TTL≤0.08。
优选的，所述摄像光学镜头满足下列关系式：-112.03≤f4/f≤-1.80；-2.86≤(R7+R8)/(R7-R8)≤42.11；0.03≤d7/TTL≤0.06。
优选的，所述摄像光学镜头的焦距为f，所述第五透镜的焦距为f5，以及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：-4.78≤f5/f≤5.40；0.00≤(R9+R10)/(R9-R10)≤1.36；0.03≤d9/TTL≤0.14。
优选的，所述摄像光学镜头满足下列关系式：-2.99≤f5/f≤4.32；0.00≤(R9+R10)/(R9-R10)≤1.09；0.05≤d9/TTL≤0.11。
优选的，所述摄像光学镜头的焦距为f，所述第六透镜的焦距为f6，所述第六透镜物侧面的曲率半径为R11，所述第六透镜像侧面的曲率半径为R12，以及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：-56.82≤f6/f≤1.12；0.36≤(R11+R12)/(R11-R12)≤16.59；0.02≤d11/TTL≤0.23。
优选的，所述摄像光学镜头满足下列关系式：-35.51≤f6/f≤0.89；0.58≤(R11+R12)/(R11-R12)≤13.27；0.03≤d11/TTL≤0.19。
优选的，所述第七透镜的像侧面于近轴为凹面；所述摄像光学镜头的焦距为f，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，以及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：-2.18≤f7/f≤267.30；0.21≤(R13+R14)/(R13-R14)≤14.55；0.03≤d13/TTL≤0.27。
优选的，所述摄像光学镜头满足下列关系式：-1.36≤f7/f≤213.84；0.34≤(R13+R14)/(R13-R14)≤11.64；0.06≤d13/TTL≤0.22。
优选的，所述摄像光学镜头的光学总长TTL小于或等于7.71毫米。
优选的，所述摄像光学镜头的光学总长TTL小于或等于7.36毫米。
优选的，所述摄像光学镜头的光圈F数小于或等于2.88。
优选的，所述摄像光学镜头的光圈F数小于或等于2.83。
本发明的有益效果在于:根据本发明的摄像光学镜头具有优秀的光学特性，超薄，广角且色像差充分补正，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；
图13是本发明第四实施方式的摄像光学镜头的结构示意图；
图14是图13所示摄像光学镜头的轴向像差示意图；
图15是图13所示摄像光学镜头的倍率色差示意图；
图16是图13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：第一透镜L1、第二透镜L2、光圈S1、第三透镜L3、第四透镜L4、第五透镜L5、第六透镜L6以及第七透镜L7。第七透镜L7的像侧可设置有光学过滤片(filter)GF等光学元件。
第一透镜L1为塑料材质，第二透镜L2为塑料材质，第三透镜L3为塑料材质，第四透镜L4为塑料材质，第五透镜L5为塑料材质，第六透镜L6为塑料材质，第七透镜L7为塑料材质。
定义整体摄像光学镜头10的最大视场角为FOV，100.00°≤FOV≤135.00°，规定了摄像光学镜头10的最大视场角，在范围内，可以实现超广角摄像，提升用户体验。优 选的，满足100.12°≤FOV≤134.98°。
定义第一透镜L1的焦距为f1，第三透镜L3的焦距为f3，-3.00≤f1/f3≤-1.00，规定了第一透镜L1的焦距f1与第三透镜L3的焦距f3的比值，可有效降低摄像用光学透镜组的敏感度，进一步提升成像质量。优选的，满足-3.00≤f1/f3≤-1.18。
定义第五透镜L5物侧面的曲率半径为R9，所述第五透镜L5像侧面的曲率半径为R10，-20.00≤R9/R10≤-1.00，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。优选的，满足-19.99≤R9/R10≤-1.00。
定义第二透镜L2的色散系数为v2，所述第四透镜L4的色散系数为v4，5.00≤v2-v4≤20.00，规定了第二镜片与第四镜片的色散系数的差值，在范围内，可以有效校正摄像光学镜头的色散，提高摄像清晰度，贴近被摄物的真实色彩，提高成像质量。优选的，满足5.20≤v2-v4≤19.61。
当本发明所述摄像光学镜头10的焦距、各透镜的焦距、相关透镜的折射率、摄像光学镜头的光学总长、轴上厚度和曲率半径满足上述关系式时，可以使摄像光学镜头10具有高性能，且满足低TTL的设计需求。
本实施方式中，第一透镜L1的物侧面于近轴处为凹面，具有负屈折力。
摄像光学镜头10的焦距为f，满足下列关系式：-4.96≤f1/f≤-1.14，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负屈折力，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。优选的，满足-3.10≤f1/f≤-1.43。
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：-5.42≤(R1+R2)/(R1-R2)≤1.05，合理控制第一透镜L1的形状，使得第一透镜L1能够有效地校正系统球差。优选的，满足-3.39≤(R1+R2)/(R1-R2)≤0.84。
第一透镜L1的轴上厚度为d1，摄像光学镜头10的光学总长为TTL，满足下列关系式：0.02≤d1/TTL≤0.15，有利于实现超薄化。优选的，0.04≤d1/TTL≤0.12。
本实施方式中，第二透镜L2的物侧面于近轴处为凸面，像侧面于近轴处为凹面，具有正屈折力。
第二透镜L2焦距f2，满足下列关系式：2.75≤f2/f≤332.36，通过将第二透镜L2的正光焦度控制在合理范围，有利于矫正光学系统的像差。优选的，4.41≤f2/f≤265.89。
第二透镜L2物侧面的曲率半径为R3，第二透镜L2像侧面的曲率半径为R4，满足下列关系式：-122.01≤(R3+R4)/(R3-R4)≤46.02，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。优选的，-76.26≤(R3+R4)/(R3-R4)≤36.82。
第二透镜L2的轴上厚度为d3，满足下列关系式：0.02≤d3/TTL≤0.08，有利于实现超薄化。优选的，0.04≤d3/TTL≤0.07。
本实施方式中，第三透镜L3的物侧面于近轴处为凸面，像侧面于近轴处为凸面，具有正屈折力。
第三透镜L3焦距f3，满足下列关系式：0.39≤f3/f≤1.90，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。优选的，0.63≤f3/f≤1.52。
第三透镜L3物侧面的曲率半径R5，第三透镜L3像侧面的曲率半径R6，满足下列关系式：-0.48≤(R5+R6)/(R5-R6)≤0.62，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。优选的，-0.30≤(R5+R6)/(R5-R6)≤0.49。
第三透镜L3的轴上厚度为d5，满足下列关系式：0.05≤d5/TTL≤0.22，有利于实现超薄化。优选的，0.08≤d5/TTL≤0.18。
本实施方式中，第四透镜L4具有负屈折力。
第四透镜L4的焦距为f4，满足下列关系式：-179.24≤f4/f≤-1.44，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。优选的，-112.03≤f4/f≤-1.80。
第四透镜L4物侧面的曲率半径R7，第四透镜L4像侧面的曲率半径R8，满足下列关系式：-4.58≤(R7+R8)/(R7-R8)≤52.64，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，易于补正轴外画角的像差等问题。优选的，-2.86≤(R7+R8)/(R7-R8)≤42.11。
第四透镜L4的轴上厚度为d7，满足下列关系式：0.02≤d7/TTL≤0.08，有利于实现超薄化。优选的，0.03≤d7/TTL≤0.06。
第五透镜L5焦距f5，满足下列关系式：-4.78≤f5/f≤5.40，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。优选的，-2.99≤f5/f≤4.32。
第五透镜L5物侧面的曲率半径R9，第五透镜L5像侧面的曲率半径R10，满足下列关系式：0.00≤(R9+R10)/(R9-R10)≤1.36，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。优选的，0.00≤(R9+R10)/(R9-R10)≤1.09。
第五透镜L5的轴上厚度为d9，满足下列关系式：0.03≤d9/TTL≤0.14，有利于实现超薄化。优选的，0.05≤d9/TTL≤0.11。
本实施方式中，第六透镜L6的物侧面于近轴处为凸面，像侧面于近轴处为凹面，具有负屈折力。
第六透镜L6焦距f6，满足下列关系式：-56.82≤f6/f≤1.12，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。优选的，-35.51≤f6/f≤0.89。
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：0.36≤(R11+R12)/(R11-R12)≤16.59，规定的是第六透镜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。优选的，0.58≤(R11+R12)/(R11-R12)≤13.27。
第六透镜L6的轴上厚度为d11，满足下列关系式：0.02≤d11/TTL≤0.23，有利于实现超薄化。优选的，0.03≤d11/TTL≤0.19。
本实施方式中，第七透镜L7的像侧面于近轴处为凹面。
第七透镜L7焦距f7，满足下列关系式：-2.18≤f7/f≤267.30，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。优选的，-1.36≤f7/f≤213.84。
第七透镜L7物侧面的曲率半径为R13，第七透镜L7像侧面的曲率半径为R14，满足下列关系式：0.21≤(R13+R14)/(R13-R14)≤14.55，规定的是第七透镜L7的形状，在条 件范围内时，随着超薄广角化发展，有利于补正轴外画角的像差等问题。优选的，0.34≤(R13+R14)/(R13-R14)≤11.64。
第七透镜L7的轴上厚度为d13，满足下列关系式：0.03≤d13/TTL≤0.27，有利于实现超薄化。优选的，0.06≤d13/TTL≤0.22。
本实施方式中，摄像光学镜头10的光学总长TTL小于或等于7.71毫米，有利于实现超薄化。优选的，摄像光学镜头10的光学总长TTL小于或等于7.36毫米。
本实施方式中，摄像光学镜头10的光圈F数小于或等于2.88。大光圈，成像性能好。优选的，摄像光学镜头10的光圈F数小于或等于2.83。
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。
本实施例中，所述摄像光学镜头10的焦距为f，所述第一透镜L1与所述第二透镜L2的组合焦距为f12，且满足下列关系式：-9.15≤f12/f≤-1.17。借此，可消除摄像光学镜头的像差与歪曲，且可压制摄像光学镜头后焦距，维持影像镜片系统组小型化。优选的，-5.72≤f12/f≤-1.46。
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1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 PCTCN2019128810-appb-000001
Figure PCTCN2019128810-appb-000002
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：光学过滤片GF的物侧面的曲率半径；
R16：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；
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；
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 PCTCN2019128810-appb-000003
其中，k是圆锥系数,A4、A6、A8、A10、A12、A14、A16、A18、A20是非球面系数。
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。“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 1 0.715    
P1R2 2 0.405 1.365  
P2R1 1 0.635    
P2R2 1 0.565    
P3R1 0      
P3R2 0      
P4R1 1 0.985    
P4R2 3 0.115 0.405 0.885
P5R1 2 0.545 1.105  
P5R2 1 1.205    
P6R1 2 0.355 1.465  
P6R2 3 0.495 1.765 2.015
P7R1 2 1.315 2.235  
P7R2 2 0.505 2.535  
【表4】
  驻点个数 驻点位置1 驻点位置2 驻点位置3
P1R1 1 1.495    
P1R2 1 0.715    
P2R1 1 1.095    
P2R2 1 1.035    
P3R1 0      
P3R2 0      
P4R1 0      
P4R2 3 0.215 0.565 1.045
P5R1 2 1.005 1.155  
P5R2 1 1.355    
P6R1 1 0.565    
P6R2 1 0.775    
P7R1 2 2.225 2.245  
P7R2 1 0.995    
图2、图3分别示出了波长为470nm、555nm和650nm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555nm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17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17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2.085mm，全视场像高为3.25mm，摄像光学镜头的最大视场角为100.24°，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：
本实施方式中，第七透镜L7为玻璃材质。
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 PCTCN2019128810-appb-000004
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 PCTCN2019128810-appb-000005
其中，k是圆锥系数,A4、A6、A8、A10、A12、A14、A16是非球面系数。
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      (2)
为方便起见，各个透镜面的非球面使用上述公式(2)中所示的非球面。但是，本发明不限于该公式(2)表示的非球面多项式形式。
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。G7R1、G7R2分别代表第七透镜L7的物侧面和像侧面。
【表7】
  反曲点个数 反曲点位置1 反曲点位置2
P1R1 2 0.285 1.705
P1R2 0    
P2R1 1 0.745  
P2R2 0    
P3R1 1 0.425  
P3R2 0    
P4R1 1 0.425  
P4R2 0    
P5R1 1 1.185  
P5R2 0    
P6R1 1 1.365  
P6R2 2 0.615 1.495
G7R1 2 0.565 1.615
G7R2 1 0.765  
【表8】
  驻点个数 驻点位置1
P1R1 1 0.505
P1R2 0  
P2R1 0  
P2R2 0  
P3R1 0  
P3R2 0  
P4R1 1 0.825
P4R2 0  
P5R1 0  
P5R2 0  
P6R1 0  
P6R2 1 0.875
G7R1 1 1.015
G7R2 1 1.645
图6、图7分别示出了波长为470nm、555nm和650nm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555nm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17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1.002mm，全视场像高为3.25mm，摄像光学镜头的最大视场角为108.18°，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。
本实施方式中，第一透镜L1为塑料材质，第二透镜L2为玻璃材质，第三透镜L3为塑料材质，第四透镜L4为塑料材质，第五透镜L5为塑料材质，第六透镜L6为塑料材质，第七透镜L7为塑料材质。
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 PCTCN2019128810-appb-000006
Figure PCTCN2019128810-appb-000007
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 PCTCN2019128810-appb-000008
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。G2R1、G2R2分别代表第二透镜L2的物侧面和像侧面。
【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 2 0.355 1.795  
P1R2 1 1.245    
G2R1 1 0.805    
G2R2 0      
P3R1 0      
P3R2 0      
P4R1 1 0.275    
P4R2 3 0.505 0.945 1.055
P5R1 2 0.485 1.235  
P5R2 1 0.415    
P6R1 2 0.455 1.385  
P6R2 1 1.335    
P7R1 2 0.415 1.685  
P7R2 2 0.605 2.605  
【表12】
  驻点个数 驻点位置1
P1R1 1 0.645
P1R2 0  
G2R1 0  
G2R2 0  
P3R1 0  
P3R2 0  
P4R1 1 0.495
P4R2 0  
P5R1 1 0.845
P5R2 1 0.705
P6R1 1 0.755
P6R2 0  
P7R1 1 0.765
P7R2 1 1.595
图10、图11分别示出了波长为470nm、555nm和650nm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555nm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17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0.878mm，全视场像高为3.25mm，摄像光学镜头的最大视场角为134.95°，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。
(第四实施方式)
第四实施方式与第三实施方式基本相同，符号含义与第三实施方式相同，以下只列出不同点。
本实施方式中，第一透镜L1为塑料材质，第二透镜L2为玻璃材质，第三透镜L3为塑料材质，第四透镜L4为塑料材质，第五透镜L5为塑料材质，第六透镜L6为塑料材质，第七透镜L7为塑料材质。
表13、表14示出本发明第四实施方式的摄像光学镜头40的设计数据。
【表13】
Figure PCTCN2019128810-appb-000009
Figure PCTCN2019128810-appb-000010
表14示出本发明第四实施方式的摄像光学镜头40中各透镜的非球面数据。
【表14】
Figure PCTCN2019128810-appb-000011
表15、表16示出本发明第四实施方式的摄像光学镜头40中各透镜的反曲点以及驻点设计数据。
【表15】
  反曲点个数 反曲点位置1 反曲点位置2
P1R1 2 0.395 1.805
P1R2 1 1.355  
G2R1 1 0.915  
G2R2 0    
P3R1 0    
P3R2 0    
P4R1 1 0.275  
P4R2 1 0.505  
P5R1 2 0.535 1.305
P5R2 1 0.435  
P6R1 2 0.375 1.395
P6R2 1 1.355  
P7R1 2 0.505 1.835
P7R2 1 0.635  
【表16】
  驻点个数 驻点位置1
P1R1 1 0.705
P1R2 0  
G2R1 0  
G2R2 0  
P3R1 0  
P3R2 0  
P4R1 1 0.495
P4R2 1 1.265
P5R1 1 0.915
P5R2 1 0.745
P6R1 1 0.635
P6R2 1 1.665
P7R1 1 0.965
P7R2 1 1.695
图14、图15分别示出了波长为470nm、555nm和650nm的光经过第四实施方式的摄像光学镜头40后的轴向像差以及倍率色差示意图。图16则示出了，波长为555nm的光经过第四实施方式的摄像光学镜头40后的场曲及畸变示意图。
如表17所示，第四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0.856mm，全视场像高为3.25mm，摄像光学镜头的最大视场角为131.21°，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17】
参数及条件式 实施例1 实施例2 实施例3 实施例4
f 3.541 2.806 2.372 2.396
f1 -8.780 -4.824 -4.416 -4.106
f2 20.020 19.180 525.526 13.202
f3 2.932 2.195 2.219 3.040
f4 -12.514 -6.065 -11.448 -214.769
f5 7.704 10.104 -5.671 -5.193
f6 -100.606 -47.615 1.726 1.784
f7 -3.588 499.992 -2.268 -2.611
f12 -16.198 -5.943 -4.156 -5.981
FNO 1.70 2.80 2.70 2.80
FOV 100.24° 108.18° 134.95° 131.21°
f1/f3 -3.00 -2.20 -1.99 -1.35
R9/R10 -19.95 -19.98 -1.01 -1.01
v2-v4 5.41 5.55 11.94 19.22
FNO为摄像光学镜头的光圈F数。
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 (19)

  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：具有负屈折力的第一透镜，具有正屈折力的第二透镜，具有正屈折力的第三透镜，具有负屈折力的第四透镜，第五透镜，第六透镜，以及第七透镜；
    所述摄像光学镜头的最大视场角为FOV，所述第一透镜的焦距为f1，所述第三透镜的焦距为f3，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，所述第二透镜的色散系数为v2，所述第四透镜的色散系数为v4，满足下列关系式：
    100.00°≤FOV≤135.00°；
    -3.00≤f1/f3≤-1.00；
    -20.00≤R9/R10≤-1.00；
    5.00≤v2-v4≤20.00。
  2. 根据权利要求1所述的摄像光学镜头，其特征在于，所述第一透镜的物侧面于近轴为凹面；
    所述摄像光学镜头的焦距为f，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，以及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：
    -4.96≤f1/f≤-1.14；
    -5.42≤(R1+R2)/(R1-R2)≤1.05；
    0.02≤d1/TTL≤0.15。
  3. 根据权利要求2所述的摄像光学镜头，其特征在于，所述摄像光学镜头满足下列关系式：
    -3.10≤f1/f≤-1.43；
    -3.39≤(R1+R2)/(R1-R2)≤0.84；
    0.04≤d1/TTL≤0.12。
  4. 根据权利要求1所述的摄像光学镜头，其特征在于，所述第二透镜的物侧面于近轴为凸面，其像侧面于近轴为凹面；
    所述摄像光学镜头的焦距为f，所述第二透镜的焦距为f2，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，以及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：
    2.75≤f2/f≤332.36；
    -122.01≤(R3+R4)/(R3-R4)≤46.02；
    0.02≤d3/TTL≤0.08。
  5. 根据权利要求4所述的摄像光学镜头，其特征在于，所述摄像光学镜头满足下列关系式：
    4.41≤f2/f≤265.89；
    -76.26≤(R3+R4)/(R3-R4)≤36.82；
    0.04≤d3/TTL≤0.07。
  6. 根据权利要求1所述的摄像光学镜头，其特征在于，所述第三透镜的物侧面于近轴为 凸面，其像侧面于近轴为凸面；
    所述摄像光学镜头的焦距为f，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，以及所述第三透镜的轴上厚度为d5，所述摄像光学镜头的光学总长为TTL，且满足下列关系式：
    0.39≤f3/f≤1.90；
    -0.48≤(R5+R6)/(R5-R6)≤0.62；
    0.05≤d5/TTL≤0.22。
  7. 根据权利要求6所述的摄像光学镜头，其特征在于，所述摄像光学镜头满足下列关系式：
    0.63≤f3/f≤1.52；
    -0.30≤(R5+R6)/(R5-R6)≤0.49；
    0.08≤d5/TTL≤0.18。
  8. 根据权利要求1所述的摄像光学镜头，其特征在于，所述摄像光学镜头的焦距为f，所述第四透镜的焦距为f4，所述第四透镜物侧面的曲率半径为R7，所述第四透镜像侧面的曲率半径为R8，以及所述第四透镜的轴上厚度为d7，所述摄像光学镜头的光学总长为TTL，且满足下列关系式：
    -179.24≤f4/f≤-1.44；
    -4.58≤(R7+R8)/(R7-R8)≤52.64；
    0.02≤d7/TTL≤0.08。
  9. 根据权利要求8所述的摄像光学镜头，其特征在于，所述摄像光学镜头满足下列关系式：
    -112.03≤f4/f≤-1.80；
    -2.86≤(R7+R8)/(R7-R8)≤42.11；
    0.03≤d7/TTL≤0.06。
  10. 根据权利要求1所述的摄像光学镜头，其特征在于，所述摄像光学镜头的焦距为f，所述第五透镜的焦距为f5，以及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：
    -4.78≤f5/f≤5.40；
    0.00≤(R9+R10)/(R9-R10)≤1.36；
    0.03≤d9/TTL≤0.14。
  11. 根据权利要求10所述的摄像光学镜头，其特征在于，所述摄像光学镜头满足下列关系式：
    -2.99≤f5/f≤4.32；
    0.00≤(R9+R10)/(R9-R10)≤1.09；
    0.05≤d9/TTL≤0.11。
  12. 根据权利要求1所述的摄像光学镜头，其特征在于，所述摄像光学镜头的焦距为f，所述第六透镜的焦距为f6，所述第六透镜物侧面的曲率半径为R11，所述第六透镜像侧面的曲率半径为R12，以及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：
    -56.82≤f6/f≤1.12；
    0.36≤(R11+R12)/(R11-R12)≤16.59；
    0.02≤d11/TTL≤0.23。
  13. 根据权利要求12所述的摄像光学镜头，其特征在于，所述摄像光学镜头满足下列关系式：
    -35.51≤f6/f≤0.89；
    0.58≤(R11+R12)/(R11-R12)≤13.27；
    0.03≤d11/TTL≤0.19。
  14. 根据权利要求1所述的摄像光学镜头，其特征在于，所述第七透镜的像侧面于近轴为凹面；
    所述摄像光学镜头的焦距为f，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，以及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：
    -2.18≤f7/f≤267.30；
    0.21≤(R13+R14)/(R13-R14)≤14.55；
    0.03≤d13/TTL≤0.27。
  15. 根据权利要求14所述的摄像光学镜头，其特征在于，所述摄像光学镜头满足下列关系式：
    -1.36≤f7/f≤213.84；
    0.34≤(R13+R14)/(R13-R14)≤11.64；
    0.06≤d13/TTL≤0.22。
  16. 根据权利要求1所述的摄像光学镜头，其特征在于，所述摄像光学镜头的光学总长TTL小于或等于7.71毫米。
  17. 根据权利要求16所述的摄像光学镜头，其特征在于，所述摄像光学镜头的光学总长TTL小于或等于7.36毫米。
  18. 根据权利要求1所述的摄像光学镜头，其特征在于，所述摄像光学镜头的光圈F数小于或等于2.88。
  19. 根据权利要求18所述的摄像光学镜头，其特征在于，所述摄像光学镜头的光圈F数小于或等于2.83。
PCT/CN2019/128810 2019-12-26 2019-12-26 摄像光学镜头 WO2021128190A1 (zh)

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