WO2021128134A1 - 摄像光学镜头 - Google Patents

摄像光学镜头 Download PDF

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Publication number
WO2021128134A1
WO2021128134A1 PCT/CN2019/128588 CN2019128588W WO2021128134A1 WO 2021128134 A1 WO2021128134 A1 WO 2021128134A1 CN 2019128588 W CN2019128588 W CN 2019128588W WO 2021128134 A1 WO2021128134 A1 WO 2021128134A1
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Prior art keywords
lens
imaging optical
optical lens
ttl
curvature
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PCT/CN2019/128588
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English (en)
French (fr)
Inventor
山崎郁
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/CN2019/128588 priority Critical patent/WO2021128134A1/zh
Publication of WO2021128134A1 publication Critical patent/WO2021128134A1/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
    • 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 lenses traditionally mounted on mobile phone cameras often adopt a three-element, four-element, five-element or even six-element lens structure.
  • the seven-element lens structure gradually appears in the lens design.
  • the seven-element lens has good optical performance, its optical power, lens spacing and lens shape settings are still unreasonable, resulting in the lens structure having good optical performance while being unable to meet the requirements of ultra-thinness. , Wide-angle design requirements.
  • the object of the present invention is to provide an imaging optical lens, which has good optical performance and meets the design requirements of ultra-thin and wide-angle.
  • the present invention provides an imaging optical lens which sequentially includes from the object side to the image side: a first lens with negative refractive power, a second lens with negative refractive power, and a first lens with positive refractive power.
  • a first lens with negative refractive power a second lens with negative refractive power
  • a first lens with positive refractive power Three lenses, a fourth lens with positive refractive power, a fifth lens, a sixth lens, and a seventh lens;
  • the maximum field angle of the imaging optical lens is FOV
  • the axial thickness of the first lens is d1
  • the axial thickness of the second lens is d3
  • the Abbe number of the second lens is v2
  • the Abbe number of the fourth lens is v4, which satisfies the following relationship:
  • the image side surface of the first lens is concave on the paraxial;
  • the focal length of the imaging optical lens is f
  • the focal length of the first lens is f1
  • the radius of curvature 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 total optical length of the imaging optical lens is TTL, and the following relationship is satisfied:
  • the imaging optical lens satisfies the following relationship:
  • the focal length of the imaging optical lens is f
  • 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, so
  • the total optical length of the camera optical lens is TTL, which satisfies the following relationship:
  • the imaging optical lens satisfies the following relationship:
  • the object side of the third lens is convex on the paraxial;
  • the focal length of the imaging optical lens is f
  • the focal length of the third lens is f3
  • 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 on-axis thickness of the third lens is d5, and the total optical length of the imaging optical lens is TTL, which satisfies the following relationship:
  • the imaging optical lens satisfies the following relationship:
  • the object side of the fourth 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 focal length of the fourth lens is f4
  • the fourth lens The radius of curvature of the object side is R7
  • the radius of curvature of the image side of the fourth lens is R8,
  • the on-axis thickness of the fourth lens is d7
  • the total optical length of the imaging optical lens is TTL, and the following relationship is satisfied:
  • the imaging optical lens satisfies the following relationship:
  • the object side of the fifth lens is concave on the paraxial;
  • the focal length of the imaging optical lens is f
  • the focal length of the fifth lens is f5
  • the radius of curvature of the object side of the fifth lens is R9
  • the curvature radius of the image side surface of the fifth lens is R10
  • the axial thickness of the fifth lens is d9
  • the total optical length of the imaging optical lens is TTL, which satisfies the following relationship:
  • the imaging optical lens satisfies the following relationship:
  • the image side surface of the sixth lens is concave on the paraxial
  • 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 sixth lens has a radius of curvature of R12.
  • the axial thickness of the lens is d11
  • the total optical length of the imaging optical lens is TTL, which satisfies the following relationship:
  • the imaging optical lens satisfies the following relationship:
  • the object side of the seventh lens is convex on the paraxial axis, and the image side is concave on the paraxial;
  • the focal length of the imaging optical lens is f
  • the focal length of the seventh lens is f7
  • the seventh lens The curvature radius of the object side surface is R13
  • the curvature radius of the image side surface 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, which satisfies the following relationship:
  • the imaging optical lens satisfies the following relationship:
  • the total optical length TTL of the imaging optical lens is less than or equal to 7.26 mm.
  • the total optical length TTL of the imaging optical lens is less than or equal to 6.93 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 good optical performance, wide-angle and ultra-thin characteristics, 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 of the first embodiment
  • 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 the imaging optical lens of the second embodiment
  • 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 the imaging optical lens of the third embodiment.
  • 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 the imaging optical lens of the fourth embodiment.
  • 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 eight lenses. Specifically, the imaging optical lens 10 includes in order from the object side to the image side: a first lens L1 with negative refractive power, a second lens L2 with negative refractive power, a third lens L3 with positive refractive power, The aperture S1, the fourth lens L4, the fifth lens L5, the sixth lens L6, and the seventh lens L7 having positive refractive power.
  • An optical element such as an optical filter GF may be provided between the seventh lens L7 and the image plane Si.
  • 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 angle of view of the imaging optical lens 10 is defined as FOV, which satisfies the following relationship 100.00° ⁇ FOV ⁇ 135.00°. Within the range of the maximum angle of view of the imaging optical lens 10 that satisfies the relational formula, ultra-wide-angle imaging can be achieved, and user experience can be improved.
  • the on-axis thickness of the first lens L1 is defined as d1
  • the on-axis thickness of the second lens is defined as d3, and the following relationship is satisfied: 0.50 ⁇ d1/d3 ⁇ 1.00.
  • the ratio of the on-axis thickness of the first lens L1 to the on-axis thickness of the second lens L2 is specified. When the ratio is within the range, it is beneficial for the lens to develop toward a wider angle.
  • the Abbe number of the second lens L2 as v2
  • the Abbe number of the fourth lens L4 as v4, satisfying the following relationship: -20.00 ⁇ v2-v4 ⁇ -10.00.
  • the difference between the dispersion coefficients of the second lens L2 and the fourth lens L4 is specified.
  • the dispersion of the imaging optical lens can be effectively corrected, the imaging definition can be improved, the true color of the object can be closer, and the imaging quality can be improved.
  • the image side surface of the first lens L1 is concave on the paraxial axis.
  • the focal length of the overall imaging optical lens 10 is f
  • the focal length of the first lens L1 is f1
  • f1 which satisfies the following relationship: -4.97 ⁇ f1/f ⁇ -1.12, which specifies the negative refractive power of the first lens L1 and the overall focal length ratio.
  • the first lens L1 has an appropriate negative 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.
  • 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: -0.13 ⁇ (R1+R2)/(R1-R2) ⁇ 8.24, reasonable control of the first lens L1
  • the shape of the first lens L1 can effectively correct the spherical aberration of the system.
  • the axial thickness of the first lens L1 is d1
  • the total optical length of the imaging optical lens is TTL, which satisfies the following relationship: 0.02 ⁇ d1/TTL ⁇ 0.15, which is conducive to achieving ultra-thinness.
  • the focal length of the overall imaging optical lens 10 is f
  • the focal length f2 of the second lens L2 satisfies the following relationship: -179.78 ⁇ f2/f ⁇ -1.51
  • the negative refractive power of the second lens L2 is controlled at A reasonable range is beneficial to correct the aberration of the optical system.
  • the curvature radius R3 of the object side surface of the second lens L2 and the curvature radius R4 of the image side surface of the second lens L2 satisfy the following relationship: -29.81 ⁇ (R3+R4)/(R3-R4) ⁇ 26.49, which specifies the second lens L2
  • -29.81 ⁇ (R3+R4)/(R3-R4) ⁇ 26.49 which specifies the second lens L2
  • the shape of the lens is within the range, as the lens develops towards ultra-thin and wide-angle, it is helpful to correct the problem of axial chromatic aberration.
  • the on-axis thickness of the second lens L2 is d3, and the total optical length of the imaging optical lens is TTL, which satisfies the following relationship: 0.02 ⁇ d3/TTL ⁇ 0.17, which is conducive to achieving ultra-thinness.
  • the object side surface of the third lens L3 is convex on the paraxial axis.
  • 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: 0.73 ⁇ f3/f ⁇ 7.62.
  • the system has 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: -33.61 ⁇ (R5+R6)/(R5-R6) ⁇ 0.25, 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 axial thickness of the third lens L3 is d5, and the total optical length of the imaging optical lens is TTL, which satisfies the following relationship: 0.04 ⁇ d5/TTL ⁇ 0.18, which is conducive to achieving ultra-thinness.
  • the object side surface of the fourth lens L4 is convex on the paraxial axis, and the image side surface thereof is convex on the paraxial axis.
  • the focal length of the overall imaging optical lens 10 is f
  • the focal length of the fourth lens L4 is f4 which satisfies the following relationship: 0.42 ⁇ f4/f ⁇ 1.66.
  • the system has 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: 0.08 ⁇ (R7+R8)/(R7-R8) ⁇ 0.73, and the fourth lens L4 is specified
  • the shape 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.
  • the axial thickness of the fourth lens L4 is d7, and the total optical length of the imaging optical lens is TTL, which satisfies the following relationship: 0.04 ⁇ d7/TTL ⁇ 0.20, which is conducive to achieving ultra-thinness.
  • the object side surface of the fifth lens L5 is concave on the paraxial axis.
  • 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: -3.09 ⁇ f5/f ⁇ 27.38.
  • the limitation on the fifth lens L5 can effectively make the light angle of the imaging lens smooth and reduce Tolerance sensitivity.
  • 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: -256.85 ⁇ (R9+R10)/(R9-R10) ⁇ 0.26, the fifth lens is specified
  • the shape of L5 is within the range of conditions, with the development of ultra-thin and wide-angle, it is conducive to correcting the aberration of the off-axis angle of view.
  • the on-axis thickness of the fifth lens L5 is d9, and the total optical length of the imaging optical lens is TTL, which satisfies the following relationship: 0.03 ⁇ d9/TTL ⁇ 0.09, which is conducive to achieving ultra-thinness.
  • the image side surface of the sixth lens L6 is concave on the paraxial axis.
  • 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: -2.75 ⁇ f6/f ⁇ 6.49.
  • the system has better imaging quality and lower image quality.
  • Sensitivity Preferably, -1.72 ⁇ f6/f ⁇ 5.19.
  • 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: -21.51 ⁇ (R11+R12)/(R11-R12) ⁇ 1.28, the sixth lens is specified
  • the shape of L6 is within the range of conditions, with the development of ultra-thin and wide-angle, it is beneficial to correct the aberration of the off-axis angle of view.
  • the on-axis thickness of the sixth lens L6 is d11, and the total optical length of the imaging optical lens is TTL, which satisfies the following relationship: 0.03 ⁇ d11/TTL ⁇ 0.10, which is conducive to achieving ultra-thinness.
  • the object side surface of the seventh lens L7 is convex on the paraxial axis, and the image side surface of the seventh lens L7 is concave on the paraxial axis.
  • 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: -8.72 ⁇ f7/f ⁇ 4.59.
  • the system has better imaging quality and lower image quality.
  • Sensitivity Preferably, -5.45 ⁇ f7/f ⁇ 3.67.
  • the curvature radius of the image side surface of the seventh lens is R14, and the axial thickness of the seventh lens is d13, which satisfies the following relationship: -10.38 ⁇ (R13+R14)/(R13-R14) ⁇ 8.07, which is
  • -10.38 ⁇ (R13+R14)/(R13-R14) ⁇ 8.07 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.
  • the axial thickness of the seventh lens L7 is d13, and the total optical length of the imaging optical lens is TTL, which satisfies the following relationship: 0.03 ⁇ d13/TTL ⁇ 0.29, which is conducive to achieving ultra-thinness.
  • the total optical length TTL of the imaging optical lens 10 is less than or equal to 7.26 mm, which is beneficial to realize ultra-thinness.
  • the total optical length TTL of the imaging optical lens 10 is less than or equal to 6.93 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 imaging optical lens 10 realizes the design requirements of wide-angle and ultra-thin design while having good optical imaging performance; according to the characteristics of the imaging optical lens 10, the imaging optical lens 10
  • the lens 10 is particularly suitable for a mobile phone camera lens assembly and a WEB camera lens 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, 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 image plane Si), 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
  • ⁇ d Abbe number
  • ⁇ 1 Abbe number of the first lens L1;
  • ⁇ 2 Abbe number of the second lens L2
  • ⁇ 3 Abbe number of the third lens L3
  • ⁇ 4 Abbe number of the fourth lens L4
  • ⁇ 5 Abbe number of the fifth lens L5;
  • ⁇ 6 Abbe number of the sixth lens L6
  • ⁇ 7 Abbe number of the seventh lens L7;
  • ⁇ g 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, and A16 are the aspheric 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 588 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. .
  • Table 17 shows the values corresponding to the various numerical values in each of the first, second, third, and fourth embodiments 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 10 is 0.868 mm
  • the full-field image height is 2.30 mm
  • the maximum field angle is 100.98°, which makes the imaging optical lens 10 wide-angle and ultra-thin. , Its 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.
  • the structure of the imaging optical lens 20 of the second embodiment is shown in FIG. 5, and only the differences are listed below.
  • Table 5 and Table 6 show design data of the imaging optical lens 20 according to the second embodiment of the present invention.
  • Table 6 shows the aspheric surface data of each lens in the imaging optical lens 20 according to the second embodiment of the present invention.
  • Table 7 and Table 8 show the design data of the inflection point and stagnation point of each lens in the imaging optical lens 20 according to the second embodiment of the present invention.
  • FIG. 6 and 7 respectively show schematic diagrams of axial aberration and chromatic aberration of magnification after light having wavelengths of 486 nm, 588 nm, and 656 nm pass through the imaging optical lens 20 of the second embodiment.
  • FIG. 8 shows a schematic diagram of field curvature and distortion of light with a wavelength of 588 nm after passing through the imaging optical lens 20 of the second 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 lens of this embodiment satisfies the above-mentioned conditional expression.
  • the entrance pupil diameter of the imaging optical lens is 0.757 mm
  • the full field of view image height is 2.30 mm
  • the maximum field of view is 117.47°, which makes the imaging optical lens 20 wide-angle and 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. Please refer to FIG. 9 for the structure of the imaging optical lens 30 of the third embodiment. Only the differences are listed below.
  • Table 9 and Table 10 show design data of the imaging optical lens 30 according to the third embodiment of the present invention.
  • Table 10 shows the aspheric surface data of each lens in the imaging optical lens 30 according to the third embodiment of the present invention.
  • Table 11 and Table 12 show the design data of the inflection point and stagnation point of each lens in the imaging optical lens 30 of the third embodiment of the present invention.
  • FIG. 10 and 11 respectively show schematic diagrams of axial aberration and chromatic aberration of magnification after light having wavelengths of 486 nm, 588 nm, and 656 nm pass through the imaging optical lens 30 of the third embodiment.
  • FIG. 12 shows a schematic diagram of field curvature and distortion of light with a wavelength of 588 nm after passing 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 lens of this embodiment satisfies the above-mentioned conditional expression.
  • the entrance pupil diameter of the imaging optical lens is 0.681mm
  • the full-field image height is 2.30mm
  • the maximum field of view is 133.95°, which makes the imaging optical lens 30 wide-angle and 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. Please refer to FIG. 13 for the structure of the imaging optical lens 40 of the fourth embodiment. Only the differences are listed below.
  • 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 486 nm, 588 nm, and 656 nm pass through the imaging optical lens 40 of the fourth embodiment.
  • FIG. 16 shows a schematic diagram of field curvature and distortion of light with a wavelength of 588 nm after passing through the imaging optical lens 40 of the fourth 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 lens of this embodiment satisfies the above-mentioned conditional expression.
  • the entrance pupil diameter of the imaging optical lens is 0.694mm
  • the full field of view image height is 2.30mm
  • the maximum field of view is 113.20°, which makes the imaging optical lens 40 wide-angle and ultra-thin.
  • the on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.
  • f12 is the combined focal length of the first lens and the second lens;
  • Fno is the aperture F number of the imaging optical lens.

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Abstract

本发明涉及光学镜头领域，公开了一种摄像光学镜头，其自物侧至像侧依序包含：具有负屈折力的第一透镜，具有负屈折力的第二透镜，具有正屈折力的第三透镜，具有正屈折力的第四透镜，第五透镜，第六透镜，以及第七透镜；摄像光学镜头的最大视场角为FOV，第一透镜的轴上厚度为d1，第二透镜的轴上厚度为d3，第二透镜的阿贝数为v2，第四透镜的阿贝数为v4，满足下列关系式：100.00≤FOV≤135.00；0.50≤d1/d3≤1.00；-20.00≤v2-v4≤-10.00。本发明提供的摄像光学镜头具有良好光学性能的同时，满足广角化、超薄化的设计要求。

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、四片式、五片式甚至是六片式透镜结构。然而，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，七片式透镜结构逐渐出现在镜头设计当中，常见的七片式透镜虽然已经具有较好的光学性能，但是其光焦度、透镜间距和透镜形状设置仍然具有一定的不合理性，导致透镜结构在具有良好光学性能的同时，无法满足超薄化、广角化的设计要求。
【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，其具有良好光学性能的同时，满足超薄化、广角化的设计要求。
为解决上述技术问题，本发明提供一种摄像光学镜头，其自物侧至像侧依序包含：具有负屈折力的第一透镜，具有负屈折力的第二透镜，具有正屈折力的第三透镜，具有正屈折力的第四透镜，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，所述第一透镜的轴上厚度为d1，所述第二透镜的轴上厚度为d3，所述第二透镜的阿贝数为v2，所述第四透镜的阿贝数为v4，满足下列关系式：
100.00°≤FOV≤135.00°；0.50≤d1/d3≤1.00；-20.00≤v2-v4≤-10.00。
优选的，所述第一透镜像侧面于近轴为凹面；所述摄像光学镜头的焦距为f，所述第一透镜的焦距为f1，所述第一透镜物侧面的曲率半径为R1，所述第一透镜像侧面的曲率半径为R2，所述摄像光学镜头的光学总长为TTL，且满足下列 关系式：
-4.97≤f1/f≤-1.12；-0.13≤(R1+R2)/(R1-R2)≤8.24；0.02≤d1/TTL≤0.15。
优选的，所述摄像光学镜头满足下列关系式：
-3.11≤f1/f≤-1.40；-0.08≤(R1+R2)/(R1-R2)≤6.59；0.04≤d1/TTL≤0.12。
优选的，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，所述摄像光学镜头的光学总长为TTL，满足下列关系式：
-179.78≤f2/f≤-1.51；-29.81≤(R3+R4)/(R3-R4)≤26.49；
0.02≤d3/TTL≤0.17。
优选的，所述摄像光学镜头满足下列关系式：
-112.36≤f2/f≤-1.88；-18.63≤(R3+R4)/(R3-R4)≤21.19；
0.03≤d3/TTL≤0.13。
优选的，所述第三透镜物侧面于近轴为凸面；所述摄像光学镜头的焦距为f，所述第三透镜的焦距为f3，所述第三透镜物侧面的曲率半径为R5，所述第三透镜像侧面的曲率半径为R6，所述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，满足下列关系式：
0.73≤f3/f≤7.62；-33.61≤(R5+R6)/(R5-R6)≤0.25；0.04≤d5/TTL≤0.18。
优选的，所述摄像光学镜头满足下列关系式：
1.17≤f3/f≤6.10；-21.01≤(R5+R6)/(R5-R6)≤0.20；0.06≤d5/TTL≤0.14。
优选的，所述第四透镜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，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，满足下列关系式：
0.42≤f4/f≤1.66；0.08≤(R7+R8)/(R7-R8)≤0.73；0.04≤d7/TTL≤0.20。
优选的，所述摄像光学镜头满足下列关系式：
0.67≤f4/f≤1.33；0.13≤(R7+R8)/(R7-R8)≤0.58；0.07≤d7/TTL≤0.16。
优选的，所述第五透镜物侧面于近轴为凹面；所述摄像光学镜头的焦距为f，所述第五透镜的焦距为f5，所述第五透镜物侧面的曲率半径为R9，所述第五透镜像侧面的曲率半径为R10，所述第五透镜的轴上厚度为d9，所述摄像光学镜头的光学总长为TTL，满足下列关系式：
-3.09≤f5/f≤27.38；-256.85≤(R9+R10)/(R9-R10)≤0.26；
0.03≤d9/TTL≤0.09。
优选的，所述摄像光学镜头满足下列关系式：
-1.93≤f5/f≤21.91；-160.53≤(R9+R10)/(R9-R10)≤0.21；
0.04≤d9/TTL≤0.07。
优选的，所述第六透镜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，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，满足下列关系式：
-2.75≤f6/f≤6.49；-21.51≤(R11+R12)/(R11-R12)≤1.28；
0.03≤d11/TTL≤0.10。
优选的，所述摄像光学镜头满足下列关系式：
-1.72≤f6/f≤5.19；-13.44≤(R11+R12)/(R11-R12)≤1.03；
0.05≤d11/TTL≤0.08。
优选的，所述第七透镜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，所述第七透镜的焦距为f7，所述第七透镜物侧面的曲率半径为R13，所述第七透镜像侧面的曲率半径为R14，所述第七透镜的轴上厚度为d13，所述摄像光学镜头的光学总长为TTL，满足下列关系式：
-8.72≤f7/f≤4.59；-10.38≤(R13+R14)/(R13-R14)≤8.07；
0.03≤d13/TTL≤0.29。
优选的，所述摄像光学镜头满足下列关系式：
-5.45≤f7/f≤3.67；-6.49≤(R13+R14)/(R13-R14)≤6.46；
0.05≤d13/TTL≤0.23。
优选的，所述摄像光学镜头的光学总长TTL小于或等于7.26毫米。
优选的，所述摄像光学镜头的光学总长TTL小于或等于6.93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良好光学性能，且具有广角化、超薄化的特性，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】
为了更清楚地说明本发明实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其它的附图，其中：
图1是实施方式一的摄像光学镜头的结构示意图；
图2是图1所示的摄像光学镜头的轴向像差示意图；
图3是图1所示的摄像光学镜头的倍率色差示意图；
图4是图1所示的摄像光学镜头的场曲及畸变示意图；
图5是实施方式二的摄像光学镜头的结构示意图；
图6是图5所示的摄像光学镜头的轴向像差示意图；
图7是图5所示的摄像光学镜头的倍率色差示意图；
图8是图5所示的摄像光学镜头的场曲及畸变示意图；
图9是实施方式三的摄像光学镜头的结构示意图；
图10是图9所示的摄像光学镜头的轴向像差示意图；
图11是图9所示的摄像光学镜头的倍率色差示意图；
图12是图9所示的摄像光学镜头的场曲及畸变示意图；
图13是实施方式四的摄像光学镜头的结构示意图；
图14是图13所示的摄像光学镜头的轴向像差示意图；
图15是图13所示的摄像光学镜头的倍率色差示意图；
图16是图13所示的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)
请参考附图，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包括八个透镜。具体的，所述摄像光学镜头10，由物侧至像侧依序包括：具有负屈折力的第一透镜L1、具有负屈折力的第二透镜L2、具有正屈折力的第三透镜L3、光圈S1、具有正屈折力的第四透镜L4、第五透镜L5、第六透镜L6以及第七透镜L7。第七透镜L7和像面Si之间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。
定义所述摄像光学镜头10的最大视场角为FOV，满足下列关系式100.00°≤FOV≤135.00°。在所述摄像光学镜头10的最大视场角满足关系式范围内，可以实现超广角摄像，提升用户体验。
定义所述第一透镜L1的轴上厚度为d1，所述第二透镜的轴上厚度为d3，满足下列关系式：0.50≤d1/d3≤1.00。规定了第一透镜L1的轴上厚度和第二透镜L2的轴上厚度的比值，在范围内时，有利于镜头向广角化发展。
定义第二透镜L2的阿贝数为v2，第四透镜L4的阿贝数为v4，满足下列关系式：-20.00≤v2-v4≤-10.00。规定了第二透镜L2与第四透镜L4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。
在本实施方式中，第一透镜L1像侧面于近轴为凹面。
整体摄像光学镜头10的焦距为f，所述第一透镜L1的焦距为f1，满足下列关系式：-4.97≤f1/f≤-1.12，规定了第一透镜L1的负屈折力与整体焦距的比值。在规定的范围内时，第一透镜L1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，-3.11≤f1/f≤-1.40。
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：-0.13≤(R1+R2)/(R1-R2)≤8.24，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，-0.08≤(R1+R2)/(R1-R2)≤6.59。
第一透镜L1的轴上厚度为d1，摄像光学镜头的光学总长为TTL，满足下列关系式：0.02≤d1/TTL≤0.15，有利于实现超薄化。优选的，0.04≤d1/TTL≤0.12。
本实施方式中，整体摄像光学镜头10的焦距为f，第二透镜L2焦距f2，满足下列关系式：-179.78≤f2/f≤-1.51，通过将第二透镜L2的负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，-112.36≤f2/f≤-1.88。
第二透镜L2物侧面的曲率半径R3，第二透镜L2像侧面的曲率半径R4，满足下列关系式：-29.81≤(R3+R4)/(R3-R4)≤26.49，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，-18.63≤(R3+R4)/(R3-R4)≤21.19。
第二透镜L2的轴上厚度为d3，摄像光学镜头的光学总长为TTL，满足下列关系式：0.02≤d3/TTL≤0.17，有利于实现超薄化。优选的，0.03≤d3/TTL≤0.13。
本实施方式中，第三透镜L3物侧面于近轴为凸面。
整体摄像光学镜头10的焦距为f，第三透镜L3焦距f3，以及满足下列关系式：0.73≤f3/f≤7.62，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，1.17≤f3/f≤6.10。
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：-33.61≤(R5+R6)/(R5-R6)≤0.25，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，-21.01≤(R5+R6)/(R5-R6)≤0.20。
第三透镜L3的轴上厚度为d5，摄像光学镜头的光学总长为TTL，满足下列关系式：0.04≤d5/TTL≤0.18，有利于实现超薄化。优选的，0.06≤d5/TTL≤0.14。
本实施方式中，第四透镜L4物侧面于近轴为凸面，其像侧面于近轴为凸面。
整体摄像光学镜头10的焦距为f，第四透镜L4焦距f4，满足下列关系式：0.42≤f4/f≤1.66，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，0.67≤f4/f≤1.33。
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：0.08≤(R7+R8)/(R7-R8)≤0.73，规定的是第四透镜L4的形状，在范围内时，随着超薄广角化的发展，有利于补正轴外画角的像差等问题。优选的，0.13≤(R7+R8)/(R7-R8)≤0.58。
第四透镜L4的轴上厚度为d7，摄像光学镜头的光学总长为TTL，满足下列关系式：0.04≤d7/TTL≤0.20，有利于实现超薄化。优选的，0.07≤d7/TTL≤0.16。
本实施方式中，第五透镜L5物侧面于近轴为凹面。
整体摄像光学镜头10的焦距为f，第五透镜L5焦距f5，满足下列关系式：-3.09≤f5/f≤27.38，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，-1.93≤f5/f≤21.91。
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：-256.85≤(R9+R10)/(R9-R10)≤0.26，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，-160.53≤(R9+R10)/(R9-R10)≤0.21。
第五透镜L5的轴上厚度为d9，摄像光学镜头的光学总长为TTL，满足下列关系式：0.03≤d9/TTL≤0.09，有利于实现超薄化。优选的，0.04≤d9/TTL≤0.07
本实施方式中，第六透镜L6像侧面于近轴为凹面。
整体摄像光学镜头10的焦距为f，第六透镜L6焦距f6，满足下列关系式：-2.75≤f6/f≤6.49，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，-1.72≤f6/f≤5.19。
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：-21.51≤(R11+R12)/(R11-R12)≤1.28，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，-13.44≤(R11+R12)/(R11-R12)≤1.03。
第六透镜L6的轴上厚度为d11，摄像光学镜头的光学总长为TTL，满足下列关系式：0.03≤d11/TTL≤0.10，有利于实现超薄化。优选的，0.05≤d11/TTL≤0.08。
本实施方式中，第七透镜L7物侧面于近轴为凸面，其像侧面于近轴为凹面。
整体摄像光学镜头10的焦距为f，第七透镜L7焦距f7，满足下列关系式： -8.72≤f7/f≤4.59，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，-5.45≤f7/f≤3.67。
所述第七透镜像侧面的曲率半径为R14，所述第七透镜的轴上厚度为d13，满足下列关系式：-10.38≤(R13+R14)/(R13-R14)≤8.07，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，-6.49≤(R13+R14)/(R13-R14)≤6.46。
第七透镜L7的轴上厚度为d13，摄像光学镜头的光学总长为TTL，满足下列关系式：0.03≤d13/TTL≤0.29，有利于实现超薄化。优选的，0.05≤d13/TTL≤0.23。
本实施方式中，摄像光学镜头10的光学总长TTL小于或等于7.26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6.93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。
即当满足上述的关系式时，使得摄像光学镜头10实现了在具有良好光学成像性能的同时，还能满足广角化、超薄化的设计要求；根据该摄像光学镜头10的特性，该摄像光学镜头10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。
下面将用实例进行说明本发明的摄像光学镜头10。各实例中所记载的符号如下所示。焦距、轴上距离、曲率半径、轴上厚度、反曲点位置、驻点位置的单位为mm。
TTL：光学总长(第一透镜L1的物侧面到像面Si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 PCTCN2019128588-appb-000001
Figure PCTCN2019128588-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；
νd：阿贝数；
ν1：第一透镜L1的阿贝数；
ν2：第二透镜L2的阿贝数；
ν3：第三透镜L3的阿贝数；
ν4：第四透镜L4的阿贝数；
ν5：第五透镜L5的阿贝数；
ν6：第六透镜L6的阿贝数；
ν7：第七透镜L7的阿贝数；
νg：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 PCTCN2019128588-appb-000003
Figure PCTCN2019128588-appb-000004
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        (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 2 0.845 1.505 0
P1R2 1 0.835 0 0
P2R1 0 0 0 0
P2R2 1 0.305 0 0
P3R1 1 0.455 0 0
P3R2 0 0 0 0
P4R1 2 0.285 0.525 0
P4R2 0 0 0 0
P5R1 0 0 0 0
P5R2 0 0 0 0
P6R1 1 0.555 0 0
P6R2 1 0.755 0 0
P7R1 3 0.365 1.035 1.645
P7R2 3 0.495 1.625 1.845
【表4】
  驻点个数 驻点位置1 驻点位置2
P1R1 0 0 0
P1R2 0 0 0
P2R1 0 0 0
P2R2 1 0.485 0
P3R1 1 0.745 0
P3R2 0 0 0
P4R1 0 0 0
P4R2 0 0 0
P5R1 0 0 0
P5R2 0 0 0
P6R1 1 0.935 0
P6R2 1 1.355 0
P7R1 2 0.725 1.315
P7R2 1 1.055 0
图2、图3分别示出了波长为486nm、588nm和656nm的光经过第一实施方式的摄像光学镜头10后的轴向像差以及倍率色差示意图。图4则示出了波长为588nm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示出各实施方式一、二、三、四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10的入瞳直径为0.868mm，全视场像高为2.30mm，最大视场角为100.98°，使得所述摄像光学镜头10广角化、超薄化，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，该第二实施方式的摄像光学镜头20的结构形式请参图5所示，以下只列出不同点。
表5、表6示出本发明第二实施方式的摄像光学镜头20的设计数据。
【表5】
Figure PCTCN2019128588-appb-000005
Figure PCTCN2019128588-appb-000006
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 PCTCN2019128588-appb-000007
表7、表8示出本发明第二实施方式的摄像光学镜头20中各透镜的反曲点以及驻点设计数据。
【表7】
  反曲点个数 反曲点位置1 反曲点位置2 反曲点位置3
P1R1 2 1.475 1.825 0
P1R2 2 1.025 1.235 0
P2R1 0 0 0 0
P2R2 1 0.465 0 0
P3R1 2 0.515 0.835 0
P3R2 0 0 0 0
P4R1 1 0.385 0 0
P4R2 0 0 0 0
P5R1 0 0 0 0
P5R2 0 0 0 0
P6R1 1 0.545 0 0
P6R2 1 0.755 0 0
P7R1 3 0.315 1.025 1.465
P7R2 1 0.465 0 0
【表8】
  驻点个数 驻点位置1 驻点位置2
P1R1 0 0 0
P1R2 0 0 0
P2R1 0 0 0
P2R2 1 0.765 0
P3R1 2 0.775 0.865
P3R2 0 0 0
P4R1 1 0.615 0
P4R2 0 0 0
P5R1 0 0 0
P5R2 0 0 0
P6R1 1 0.895 0
P6R2 1 1.285 0
P7R1 1 0.575 0
P7R2 1 0.935 0
图6、图7分别示出了波长为486nm、588nm和656nm的光经过第二实施方式的摄像光学镜头20后的轴向像差以及倍率色差示意图。图8则示出了波长为588nm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。
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镜头满足上述的条件式。
在本实施方式中，所述摄像光学镜头的入瞳直径为0.757mm，全视场像高为2.30mm，最大视场角为117.47°，使得所述摄像光学镜头20广角化、超薄化，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，该第三实施方式的摄像光学镜头30的结构形式请参图9所示，以下只列出不同点。
表9、表10示出本发明第三实施方式的摄像光学镜头30的设计数据。
【表9】
Figure PCTCN2019128588-appb-000008
表10示出本发明第三实施方式的摄像光学镜头30中各透镜的非球面数据。
【表10】
Figure PCTCN2019128588-appb-000009
表11、表12示出本发明第三实施方式的摄像光学镜头30中各透镜的反曲点以及驻点设计数据。
【表11】
  反曲点个数 反曲点位置1 反曲点位置2
P1R1 2 1.515 1.985
P1R2 2 1.025 1.155
P2R1 0 0 0
P2R2 2 0.095 0.335
P3R1 2 0.425 0.775
P3R2 0 0 0
P4R1 1 0.435 0
P4R2 0 0 0
P5R1 0 0 0
P5R2 0 0 0
P6R1 1 0.625 0
P6R2 1 0.735 0
P7R1 1 0.345 0
P7R2 1 0.465 0
【表12】
  驻点个数 驻点位置1 驻点位置2
P1R1 0 0 0
P1R2 0 0 0
P2R1 0 0 0
P2R2 2 0.155 0.435
P3R1 1 0.665 0
P3R2 0 0 0
P4R1 0 0 0
P4R2 0 0 0
P5R1 0 0 0
P5R2 0 0 0
P6R1 1 1.035 0
P6R2 1 1.155 0
P7R1 1 0.665 0
P7R2 1 0.995 0
图10、图11分别示出了波长为486nm、588nm和656nm的光经过第三实施方式的摄像光学镜头30后的轴向像差以及倍率色差示意图。图12则示出了波长为588nm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镜头满足上述的条件式。
在本实施方式中，所述摄像光学镜头的入瞳直径为0.681mm，全视场像高为2.30mm，最大视场角为133.95°，使得所述摄像光学镜头30广角化、超薄化，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)
第四实施方式与第一实施方式基本相同，符号含义与第一实施方式相同，该第四实施方式的摄像光学镜头40的结构形式请参图13所示，以下只列出不同点。
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 PCTCN2019128588-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 PCTCN2019128588-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 反曲点位置3
P1R1 1 0.765 0 0
P1R2 1 2.175 0 0
P2R1 1 1.775 0 0
P2R2 0 0 0 0
P3R1 0 0 0 0
P3R2 0 0 0 0
P4R1 1 0.605 0 0
P4R2 0 0 0 0
P5R1 1 0.775 0 0
P5R2 1 0.745 0 0
P6R1 2 0.105 0.425 0
P6R2 1 0.575 0 0
P7R1 3 0.465 0.695 1.735
P7R2 1 0.585 0 0
【表16】
  驻点个数 驻点位置1 驻点位置2
P1R1 1 1.535 0
P1R2 0 0 0
P2R1 0 0 0
P2R2 0 0 0
P3R1 0 0 0
P3R2 0 0 0
P4R1 0 0 0
P4R2 0 0 0
P5R1 0 0 0
P5R2 1 0.965 0
P6R1 2 0.175 0.555
P6R2 1 1.105 0
P7R1 0 0 0
P7R2 1 1.235 0
图14、图15分别示出了波长为486nm、588nm和656nm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588nm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。
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镜头满足上述的条件式。
在本实施方式中，所述摄像光学镜头的入瞳直径为0.694mm，全视场像高为2.30mm，最大视场角为113.20°，使得所述摄像光学镜头40广角化、超薄化，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 实施方式1 实施方式2 实施方式3 实施方式4
f 2.432 2.120 1.907 1.942
f1 -6.046 -4.160 -3.654 -3.262
f2 -37.637 -67.020 -4.308 -174.587
f3 3.808 3.560 2.784 9.869
f4 2.544 2.352 1.851 1.622
f5 -3.499 -3.062 -2.946 35.455
f6 9.736 9.176 7.162 -2.674
f7 -10.607 -6.398 -7.179 5.946
f12 -5.232 -4.072 -1.760 -3.157
FOV 100.98° 117.47° 133.95° 113.20°
d1/d3 0.55 0.77 0.97 0.63
v2-v4 -19.95 -15.00 -10.05 -10.05
Fno 2.80 2.80 2.80 2.80
其中，f12为第一透镜与第二透镜的组合焦距；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，具有负屈折力的第二透镜，具有正屈折力的第三透镜，具有正屈折力的第四透镜，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，所述第一透镜的轴上厚度为d1，所述第二透镜的轴上厚度为d3，所述第二透镜的阿贝数为v2，所述第四透镜的阿贝数为v4，满足下列关系式：
    100.00°≤FOV≤135.00°；
    0.50≤d1/d3≤1.00；
    -20.00≤v2-v4≤-10.00。
  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，所述第一透镜的焦距为f1，所述第一透镜物侧面的曲率半径为R1，所述第一透镜像侧面的曲率半径为R2，所述摄像光学镜头的光学总长为TTL，且满足下列关系式：
    -4.97≤f1/f≤-1.12；
    -0.13≤(R1+R2)/(R1-R2)≤8.24；
    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：
    -3.11≤f1/f≤-1.40；
    -0.08≤(R1+R2)/(R1-R2)≤6.59；
    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，所述摄像光学镜头的 光学总长为TTL，满足下列关系式：
    -179.78≤f2/f≤-1.51；
    -29.81≤(R3+R4)/(R3-R4)≤26.49；
    0.02≤d3/TTL≤0.17。
  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：
    -112.36≤f2/f≤-1.88；
    -18.63≤(R3+R4)/(R3-R4)≤21.19；
    0.03≤d3/TTL≤0.13。
  6. 根据权利要求1所述的摄像光学镜头，其特征在于，所述第三透镜物侧面于近轴为凸面；
    所述摄像光学镜头的焦距为f，所述第三透镜的焦距为f3，所述第三透镜物侧面的曲率半径为R5，所述第三透镜像侧面的曲率半径为R6，所述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，满足下列关系式：
    0.73≤f3/f≤7.62；
    -33.61≤(R5+R6)/(R5-R6)≤0.25；
    0.04≤d5/TTL≤0.18。
  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：
    1.17≤f3/f≤6.10；
    -21.01≤(R5+R6)/(R5-R6)≤0.20；
    0.06≤d5/TTL≤0.14。
  8. 根据权利要求1所述的摄像光学镜头，其特征在于，所述第四透镜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，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，满足 下列关系式：
    0.42≤f4/f≤1.66；
    0.08≤(R7+R8)/(R7-R8)≤0.73；
    0.04≤d7/TTL≤0.20。
  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：
    0.67≤f4/f≤1.33；
    0.13≤(R7+R8)/(R7-R8)≤0.58；
    0.07≤d7/TTL≤0.16。
  10. 根据权利要求1所述的摄像光学镜头，其特征在于，所述第五透镜物侧面于近轴为凹面；
    所述摄像光学镜头的焦距为f，所述第五透镜的焦距为f5，所述第五透镜物侧面的曲率半径为R9，所述第五透镜像侧面的曲率半径为R10，所述第五透镜的轴上厚度为d9，所述摄像光学镜头的光学总长为TTL，满足下列关系式：
    -3.09≤f5/f≤27.38；
    -256.85≤(R9+R10)/(R9-R10)≤0.26；
    0.03≤d9/TTL≤0.09。
  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：
    -1.93≤f5/f≤21.91；
    -160.53≤(R9+R10)/(R9-R10)≤0.21；
    0.04≤d9/TTL≤0.07。
  12. 根据权利要求1所述的摄像光学镜头，其特征在于，所述第六透镜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，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， 满足下列关系式：
    -2.75≤f6/f≤6.49；
    -21.51≤(R11+R12)/(R11-R12)≤1.28；
    0.03≤d11/TTL≤0.10。
  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：
    -1.72≤f6/f≤5.19；
    -13.44≤(R11+R12)/(R11-R12)≤1.03；
    0.05≤d11/TTL≤0.08。
  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，所述第七透镜的焦距为f7，所述第七透镜物侧面的曲率半径为R13，所述第七透镜像侧面的曲率半径为R14，所述第七透镜的轴上厚度为d13，所述摄像光学镜头的光学总长为TTL，满足下列关系式：
    -8.72≤f7/f≤4.59；
    -10.38≤(R13+R14)/(R13-R14)≤8.07；
    0.03≤d13/TTL≤0.29。
  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：
    -5.45≤f7/f≤3.67；
    -6.49≤(R13+R14)/(R13-R14)≤6.46；
    0.05≤d13/TTL≤0.23。
  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7.26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6.93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/CN2019/128588 2019-12-26 2019-12-26 摄像光学镜头 WO2021128134A1 (zh)

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CN101373261A (zh) * 2007-08-22 2009-02-25 鸿富锦精密工业（深圳）有限公司 广角镜头及使用该广角镜头的车辆装置
CN109839730A (zh) * 2019-03-26 2019-06-04 厦门力鼎光电股份有限公司 一种光学成像镜头
CN110412720A (zh) * 2018-04-28 2019-11-05 宁波舜宇车载光学技术有限公司 光学镜头
CN110456475A (zh) * 2018-05-08 2019-11-15 宁波舜宇车载光学技术有限公司 光学镜头
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US6437926B2 (en) * 2000-03-21 2002-08-20 Masao Mori Image capture lens and image capture apparatus
CN101373261A (zh) * 2007-08-22 2009-02-25 鸿富锦精密工业（深圳）有限公司 广角镜头及使用该广角镜头的车辆装置
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