WO2021168884A1 - 摄像光学镜头 - Google Patents

摄像光学镜头 Download PDF

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Publication number
WO2021168884A1
WO2021168884A1 PCT/CN2020/077788 CN2020077788W WO2021168884A1 WO 2021168884 A1 WO2021168884 A1 WO 2021168884A1 CN 2020077788 W CN2020077788 W CN 2020077788W WO 2021168884 A1 WO2021168884 A1 WO 2021168884A1
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Prior art keywords
lens
imaging optical
curvature
radius
ttl
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PCT/CN2020/077788
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English (en)
French (fr)
Inventor
胡甜甜
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诚瑞光学(常州)股份有限公司
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Publication of WO2021168884A1 publication Critical patent/WO2021168884A1/zh

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B9/00—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or -
    • G02B9/60—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having five components only
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
    • G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
    • G02B13/0045—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having five or more lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/0025—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for optical correction, e.g. distorsion, 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 mostly adopt a three-element or four-element lens structure.
  • a five-element lens structure gradually appears in the lens design.
  • the purpose of the present invention is to provide an imaging optical lens that can meet the requirements of ultra-thinness while obtaining high imaging performance.
  • an imaging optical lens from the object side to the image side, including: a first lens with positive refractive power, a second lens with negative refractive power, a third lens with negative refractive power, A fourth lens with positive refractive power and a fifth lens with negative refractive power; wherein the focal length of the second lens is f2, the overall focal length of the imaging optical lens is f, and the axial thickness of the first lens is d1, the on-axis distance from the image side surface of the first lens to the object side surface of the second lens is d2, the curvature radius of the object side surface of the third lens is R5, and the curvature of the image side surface of the third lens The radius is R6, the radius of curvature of the object side of the fifth lens is R9, the on-axis thickness of the fifth lens is d9, the radius of curvature of the object side of the first lens is R1, and the radius of curvature of the first lens is R1.
  • the radius of curvature of the image side is R2, and satisfies the following relationship: -3.50 ⁇ f2/f ⁇ -1.50; 10.00 ⁇ d1/d2 ⁇ 35.00; 1.80 ⁇ (R5+R6)/(R5-R6) ⁇ 8.00; R9/ d9 ⁇ -15.00; -30.00 ⁇ R2/R1 ⁇ -10.00.
  • the radius of curvature of the image side surface of the second lens is R4, and satisfies the following relationship: 1.50 ⁇ R4/f ⁇ 10.00.
  • the focal length of the first lens is f1
  • the radius of curvature of the object side of the first lens is R1
  • the radius of curvature of the image side of the first lens is R2
  • the total optical length of the imaging optical lens is TTL, and satisfies the following relationship: 0.36 ⁇ f1/f ⁇ 1.33; -1.87 ⁇ (R1+R2)/(R1-R2) ⁇ -0.55; 0.12 ⁇ d1/TTL ⁇ 0.46.
  • 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
  • the axial thickness of the second lens is d3
  • the optical The total length is TTL, and satisfies the following relationship: -1.58 ⁇ (R3+R4)/(R3-R4) ⁇ 3.01; 0.02 ⁇ d3/TTL ⁇ 0.08.
  • the focal length of the third lens is f3, 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: -8.11 ⁇ f3/f ⁇ - 1.23; 0.02 ⁇ d5/TTL ⁇ 0.12.
  • 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 on-axis thickness of the fourth lens Is d7
  • the total optical length of the camera optical lens is TTL, and satisfies the following relationship: 0.32 ⁇ f4/f ⁇ 1.49; -0.75 ⁇ (R7+R8)/(R7-R8) ⁇ 0.65; 0.05 ⁇ d7/TTL ⁇ 0.45.
  • the focal length of the fifth lens is f5
  • the radius of curvature of the image side surface of the fifth lens is R10
  • the total optical length of the imaging optical lens is TTL, and the following relationship is satisfied: -1.36 ⁇ f5/f ⁇ -0.41; 0.38 ⁇ (R9+R10)/(R9-R10) ⁇ 1.37; 0.03 ⁇ d9/TTL ⁇ 0.24.
  • the total optical length of the imaging optical lens is TTL
  • the image height of the imaging optical lens is IH, and the following relationship is satisfied: TTL/IH ⁇ 2.00.
  • the combined focal length of the first lens and the second lens is f12, which satisfies the following relationship: 0.49 ⁇ f12/f ⁇ 1.81.
  • the aperture F number of the imaging optical lens is Fno, and satisfies the following relational expression: Fno ⁇ 3.17.
  • the imaging optical lens provided by the present invention has good optical performance and meets the design requirements of ultra-thinness.
  • FIG. 1 is a schematic diagram of the structure of the 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 an 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.
  • the present invention provides an imaging optical lens 10 according to a first embodiment.
  • the left side is the object side
  • the right side is the image side.
  • the imaging optical lens 10 mainly includes five lenses. From the object side to the image side, the aperture S1, the first lens L1, the second lens L2, and the third lens Lens L3, fourth lens L4, and fifth lens L5.
  • a glass plate GF is provided between the fifth lens L5 and the image plane Si.
  • the glass plate GF may be a glass cover plate or an optical filter.
  • the first lens L1 has positive refractive power; the second lens L2 has negative refractive power; the third lens L3 has negative refractive power; the fourth lens L4 has positive refractive power; the fifth lens L5 has negative refractive power .
  • the focal length of the second lens is f2
  • the overall focal length of the imaging optical lens is f
  • the axial thickness of the first lens is d1
  • the image side surface of the first lens reaches the second lens
  • the on-axis distance of the object side of the third lens is d2
  • the radius of curvature of the object side of the third lens is R5
  • the radius of curvature of the image side of the third lens is R6
  • the radius of curvature of the object side of the fifth lens is R9
  • the on-axis thickness of the fifth lens is d9
  • the radius of curvature of the object side of the first lens is R1
  • the radius of curvature of the image side of the first lens is R2, which satisfies the following relationship:
  • conditional formula (1) specifies the ratio of the focal length of the second lens to the total focal length of the system, which can effectively balance the spherical aberration and field curvature of the system.
  • -3.42 ⁇ f2/f ⁇ -1.52 is satisfied.
  • the conditional formula (2) specifies the ratio of the thickness of the first lens to the air gap between the first and second lenses, which helps to compress the total length of the optical system within the scope of the conditional formula and achieve an ultra-thinning effect.
  • 10.50 ⁇ d1/d2 ⁇ 35.00 is satisfied.
  • Conditional expression (3) specifies the shape of the third lens. Within this range, with the development of ultra-thin and wide-angle, it is beneficial to correct the aberration of the off-axis angle of view.
  • conditional formula (4) specifies the ratio of the radius of curvature of the fifth lens object side surface to the thickness of the fifth lens, which helps to improve the performance of the optical system within the range of the conditional formula.
  • R9/d9 ⁇ -15.09 is satisfied.
  • Conditional formula (5) specifies the shape of the first lens. Within the range specified by the conditional formula, the degree of deflection of light passing through the lens can be relaxed, and aberrations can be effectively reduced.
  • the curvature radius of the image side surface of the second lens as R4, and the overall focal length of the imaging optical lens as f, which satisfies the following relationship: 1.50 ⁇ R4/f ⁇ 10.00, which specifies the ratio of the curvature radius of the image side surface of the second lens to the total focal length of the system , Within the scope of the conditional formula, it helps to improve the performance of the optical system.
  • the object side surface of the first lens L1 is convex at the paraxial position, and the image side surface thereof is convex at the paraxial position.
  • the focal length f1 of the first lens L1 is defined, and the overall focal length of the imaging optical lens is f, which satisfies the following relationship: 0.36 ⁇ f1/f ⁇ 1.33, which specifies the ratio of the focal length of the first lens L1 to the overall focal length.
  • the first lens has an appropriate positive refractive power, which is beneficial to reduce system aberrations, and at the same time, is beneficial to the development of ultra-thin and wide-angle lenses.
  • 0.58 ⁇ f1/f ⁇ 1.06 is satisfied.
  • the axial thickness of the first lens L1 is d1
  • the total optical length of the imaging optical lens is TTL, which satisfies the following relationship: 0.12 ⁇ d1/TTL ⁇ 0.46.
  • it is beneficial to realize ultra-thinness Preferably, 0.19 ⁇ d1/TTL ⁇ 0.37 is satisfied.
  • the object side surface of the second lens L2 is concave at the paraxial position, and the image side surface thereof is concave at the paraxial position.
  • the curvature radius of the object side surface of the second lens L2 as R3, and the curvature radius of the image side surface of the second lens L2 as R4, which satisfies the following relationship: -1.58 ⁇ (R3+R4)/(R3-R4) ⁇ 3.01.
  • the shape of the two lens L2 is within the range, as the lens becomes ultra-thin and wide-angle, it is beneficial to correct the problem of axial chromatic aberration.
  • -0.99 ⁇ (R3+R4)/(R3-R4) ⁇ 2.41 is satisfied.
  • 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 ⁇ 0.08. Within the range of the conditional formula, it is beneficial to realize ultra-thinness. Preferably, 0.03 ⁇ d3/TTL ⁇ 0.07 is satisfied.
  • the object side surface of the third lens L3 is convex at the paraxial position, and the image side surface of the third lens L3 is concave at the paraxial position.
  • the focal length of the third lens L3 as f3
  • the overall focal length of the imaging optical lens 10 as f, which satisfies the following relationship: -8.11 ⁇ f3/f ⁇ -1.23.
  • the reasonable distribution of optical power enables the system to have better imaging Quality and low sensitivity.
  • -5.07 ⁇ f3/f ⁇ -1.54 is satisfied.
  • 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: 0.02 ⁇ d5/TTL ⁇ 0.12. Within the range of the conditional formula, it is beneficial to realize ultra-thinness. Preferably, 0.04 ⁇ d5/TTL ⁇ 0.09 is satisfied.
  • the object side surface of the fourth lens L4 is convex at the paraxial position, and the image side surface thereof is convex at the paraxial position.
  • the focal length of the fourth lens L4 as f4
  • the overall focal length of the imaging optical lens 10 as f, which satisfies the following relationship: 0.32 ⁇ f4/f ⁇ 1.49, which specifies the ratio of the focal length of the fourth lens to the focal length of the system, which is within the range of the conditional expression Helps improve the performance of the optical system.
  • 0.52 ⁇ f4/f ⁇ 1.19 is satisfied.
  • the curvature radius of the object side surface of the fourth lens L4 as R7
  • the curvature radius of the image side surface of the fourth lens L4 as R8, which satisfies the following relationship: -0.75 ⁇ (R7+R8)/(R7-R8) ⁇ 0.65, the stipulation is
  • the shape of the fourth lens L4 is within the range, with the development of ultra-thin and wide-angle, it is beneficial to correct the aberration of the off-axis angle of view.
  • -0.47 ⁇ (R7+R8)/(R7-R8) ⁇ 0.52 is satisfied.
  • 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: 0.05 ⁇ d7/TTL ⁇ 0.45. Within the range of the conditional formula, it is beneficial to realize ultra-thinness. Preferably, 0.08 ⁇ d7/TTL ⁇ 0.36 is satisfied.
  • the object side surface of the fifth lens L5 is concave at the paraxial position, and the image side surface is concave at the paraxial position.
  • the focal length of the fifth lens L5 as f5
  • the overall focal length of the imaging optical lens 10 as f, which satisfies the following relationship: -1.36 ⁇ f5/f ⁇ -0.41.
  • the limitation on the fifth lens L5 can effectively make the light of the imaging lens
  • the angle is gentle, reducing tolerance sensitivity.
  • -0.85 ⁇ f5/f ⁇ -0.51 is satisfied.
  • the radius of curvature of the object side surface of the fifth lens L5 is R9
  • the radius of curvature of the image side surface of the fifth lens L5 is R10, which satisfies the following relationship: 0.38 ⁇ (R9+R10)/(R9-R10) ⁇ 1.37.
  • the shape of the five lens L5 is within the range, with the development of ultra-thin and wide-angle, it is beneficial to correct the aberration of the off-axis angle of view.
  • 0.61 ⁇ (R9+R10)/(R9-R10) ⁇ 1.09 is satisfied.
  • 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 ⁇ 0.24. Within the range of the conditional formula, it is beneficial to realize ultra-thinness. Preferably, 0.04 ⁇ d9/TTL ⁇ 0.20 is satisfied.
  • the total optical length of the imaging optical lens is TTL
  • the image height of the imaging optical lens is IH
  • the following conditional formula is satisfied: TTL/IH ⁇ 2.00, thereby achieving ultra-thinness.
  • the aperture Fno of the imaging optical lens 10 is less than or equal to 3.17, thereby achieving a large aperture and good imaging performance.
  • Fno ⁇ 3.11 is satisfied.
  • 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, which satisfies the following relational expression: 0.49 ⁇ f12/f ⁇ 1.81.
  • the conditional expression 0.49 ⁇ f12/f ⁇ 1.81.
  • the aberration and distortion of the imaging optical lens 10 are eliminated, the back focal length of the imaging optical lens 10 can be suppressed, and the miniaturization of the imaging lens system group can be maintained.
  • 0.78 ⁇ f12/f ⁇ 1.45 is satisfied.
  • the surface of each lens can be set as an aspherical surface.
  • the aspherical surface can be easily made into a shape other than a spherical surface, and more control variables can be obtained to reduce aberrations, thereby reducing the use of lenses. Therefore, the total length of the imaging optical lens 10 can be effectively reduced.
  • both the object side surface and the image side surface of each lens are aspherical.
  • the imaging optical lens 10 can reasonably allocate each The optical power, spacing and shape of the lens, and therefore correct various aberrations.
  • At least one of the object side surface and the image side surface of each lens may also be provided with an inflection point and/or a stagnation point to meet high-quality imaging requirements.
  • an inflection point and/or a stagnation point may also be provided with an inflection point and/or a stagnation point to meet high-quality imaging requirements.
  • the design data of the imaging optical lens 10 shown in FIG. 1 is shown below.
  • Table 1 lists the object side curvature radius and the image side curvature radius R of the first lens L1 to the fifth lens L5 constituting the imaging optical lens 10 in the first embodiment of the present invention, the on-axis thickness of each lens, and two adjacent lenses The distance d, the refractive index nd and the Abbe number ⁇ d. It should be noted that 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 Optical length (the on-axis distance from the object side of the first lens L1 to the imaging surface), the unit is mm.
  • 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 of the optical filter GF
  • R12 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 optical filter GF;
  • d11 the axial thickness of the optical filter GF
  • d12 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;
  • ndg the refractive index of the d-line of the optical filter GF
  • vg Abbe number of optical filter GF.
  • Table 2 shows the aspheric surface data of each lens in the imaging optical lens 10 according to the first embodiment of the present invention.
  • k is the conic coefficient
  • A4, A6, A8, A10, A12, A14, A16, A18, and 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 this embodiment.
  • 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 and P4R2 represent the object side and image side of the fourth lens L4, respectively
  • P5R1 and P5R2 represent the object side and the image side of the fifth lens L5, 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 546 nm after passing through the imaging optical lens 10.
  • the curvature of field S in FIG. 4 is the curvature of field in the sagittal direction
  • T is the curvature of field in the meridional direction.
  • the imaging optical lens 10 has an entrance pupil diameter of 1.410 mm, a full-field image height of 2.589 mm, and a diagonal field angle of 77.20°, which is ultra-thin and has excellent optical characteristics.
  • FIG. 5 is a schematic diagram of the structure of the imaging optical lens 20 in the second embodiment.
  • the second embodiment is basically the same as the first embodiment.
  • the meanings of the symbols in the following list are also the same as those in the first embodiment, so the same parts will not be omitted here. To repeat, only the differences are listed below.
  • the object side surface of the second lens L2 is convex at the paraxial position.
  • 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.
  • FIGS. 6 and 7 respectively show schematic diagrams of axial aberration and chromatic aberration of magnification after light with wavelengths of 436 nm, 486 nm, 546 nm, 588 nm, and 656 nm pass through the imaging optical lens 20.
  • FIG. 8 shows a schematic diagram of field curvature and distortion of light with a wavelength of 546 nm after passing through the imaging optical lens 20.
  • the curvature of field S in FIG. 8 is the curvature of field in the sagittal direction
  • T is the curvature of field in the meridional direction.
  • the imaging optical lens 20 has an entrance pupil diameter of 1.380 mm, a full field of view image height of 2.589 mm, and a diagonal field of view angle of 62.48°, which is ultra-thin and has excellent optical characteristics.
  • FIG. 9 is a schematic diagram of the structure of the imaging optical lens 30 in the third embodiment.
  • the third embodiment is basically the same as the first embodiment.
  • the meanings of the symbols in the following list are also the same as those in the first embodiment, so the same parts will not be omitted here. To repeat, 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.
  • FIG. 10 and 11 respectively show schematic diagrams of the axial aberration and the chromatic aberration of magnification after the light with wavelengths of 436 nm, 486 nm, 546 nm, 588 nm, and 656 nm pass through the imaging optical lens 30.
  • FIG. 12 shows a schematic diagram of field curvature and distortion of light with a wavelength of 546 nm after passing through the imaging optical lens 30.
  • the curvature of field S in FIG. 12 is the curvature of field in the sagittal direction, and T is the curvature of field in the meridional direction.
  • the imaging optical lens 10 has an entrance pupil diameter of 1.410 mm, a full field of view image height of 2.589 mm, and a diagonal field of view angle of 71.72°, which is ultra-thin and has excellent optical characteristics.
  • Table 13 lists the values of the corresponding conditional expressions in the first embodiment, the second embodiment, the third embodiment, and the fourth embodiment according to the above conditional expressions, as well as the values of other related parameters.

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Abstract

一种摄像光学镜头(10)，由物侧至像侧依次包括具有正屈折力的第一透镜(L1)、具有负屈折力的第二透镜(L2)、具有负屈折力的第三透镜(L3)、具有正屈折力的第四透镜(L4)及具有负屈折力的第五透镜(L5)，且满足以下关系式：-3.50≤f2/f≤-1.50；10.00≤d1/d2≤35.00；1.80≤(R5+R6)/(R5-R6)≤8.00；R9/d9≤-15.00；-30.00≤R2/R1≤-10.00。摄像光学镜头(10)在具有良好的光学性能的同时，还满足超薄化的设计要求。

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、超薄的长焦距摄像光学镜头。
【发明内容】
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，满足超薄化的要求。
本发明的技术方案如下：一种摄像光学镜头，由物侧至像侧依次包括：具有正屈折力的第一透镜、具有负屈折力的第二透镜、具有负屈折力的第三透镜、具有正屈折力的第四透镜及具有负屈折力的第五透镜；其中，所述第二透镜的焦距为f2，所述摄像光学镜头整体的焦距为f，所述第一透镜的轴上厚度为d1，所述第一透镜的像侧面到所述第二透镜的物侧面的轴上距离为d2，所述第三透镜的物侧面的曲率半径为R5，所述第三透镜的像侧面的曲率半径为R6，所述第五透镜的物侧面的曲率半径为R9，所述第五透镜的轴上厚度为d9，所述第一透镜的物侧面的曲率半径为R1，所述第一透镜的像侧面的曲率半径为R2，且满足下列关系式：-3.50≤f2/f≤-1.50；10.00≤d1/d2≤35.00；1.80≤(R5+R6)/(R5-R6)≤8.00；R9/d9≤-15.00；-30.00≤R2/R1≤-10.00。
优选地，所述第二透镜的像侧面的曲率半径为R4，且满足下列关系式：1.50≤R4/f≤10.00。
优选地，所述第一透镜的焦距为f1，所述第一透镜的物侧面的曲率半径为R1，所述第一透镜的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：0.36≤f1/f≤1.33；-1.87≤(R1+R2)/(R1-R2)≤-0.55；0.12≤d1/TTL≤0.46。
优选地，所述第二透镜的物侧面的曲率半径为R3，所述第二透镜的像侧面的曲率半径为R4，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：-1.58≤(R3+R4)/(R3-R4)≤3.01；0.02≤d3/TTL≤0.08。
优选地，所述第三透镜的焦距为f3，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：-8.11≤f3/f≤-1.23；0.02≤d5/TTL≤0.12。
优选地，所述第四透镜的焦距为f4，所述第四透镜的物侧面的曲率半径为R7，所述第四透镜的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，且满足下列关系式：0.32≤f4/f≤1.49；-0.75≤(R7+R8)/(R7-R8)≤0.65；0.05≤d7/TTL≤0.45。
优选地，所述第五透镜的焦距为f5，所述第五透镜的像侧面的曲率半径为R10，所述摄像光学镜头的光学总长为TTL，且满足下列关系式：-1.36≤f5/f≤-0.41；0.38≤(R9+R10)/(R9-R10)≤1.37；0.03≤d9/TTL≤0.24。
优选地，所述摄像光学镜头的光学总长为TTL，所述摄像光学镜头的像高为IH，且满足下列关系式：TTL/IH≤2.00。
优选地，所述第一透镜与所述第二透镜的组合焦距为f12，满足下列关系式：0.49≤f12/f≤1.81。
优选地，所述摄像光学镜头的光圈F数为Fno，且满足下列关系式：Fno≤3.17。
本发明的有益效果在于：
本发明提供的摄像光学镜头在具有良好光学性能的同时，满足超薄化的设计要求。
【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。
【具体实施方式】
下面结合附图和实施方式对本发明作进一步说明。
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)
请一并参阅图1至图4，本发明提供了第一实施方式的摄像光学镜头10。在图1中，左侧为物侧，右侧为像侧，摄像光学镜头10主要包括五个透镜，从物侧至像侧依次为光圈S1、第一透镜L1、第二透镜L2、第三透镜L3、第四透镜L4及第五透镜L5。在第五透镜L5与像面Si之间设有玻璃平板GF，玻璃平板GF可以是玻璃盖板，也可以是光学过滤片。
在本实施方式中，第一透镜L1具有正屈折力；第二透镜L2具有负屈折力；第三透镜L3具有负屈折力；第四透镜L4具有正屈折力；第五透镜L5具有负屈折力。
在此，所述第二透镜的焦距为f2，所述摄像光学镜头整体的焦距为f，所述第一透镜的轴上厚度为d1，所述第一透镜的像侧面到所述第二透镜的物侧面的轴上距离为d2，所述第三透镜的物侧面的曲率半径为R5，所述第三透镜的像侧面的曲率半径为R6，所述第五透镜的物侧面的曲率半径为R9，所述第五透镜的轴上厚度为d9，所述第一透镜的物侧面的曲率半径为R1，所述第一透镜的像侧面的曲率半径为R2，满足下列关系式：
-3.50≤f2/f≤-1.50        (1)
10.00≤d1/d2≤35.00        (2)
1.80≤(R5+R6)/(R5-R6)≤8.00        (3)
R9/d9≤-15.00          (4)
-30.00≤R2/R1≤-10.00        (5)
其中，条件式(1)规定了第二透镜焦距与系统总焦距的比值，可以有效地平衡系统的的球差以及场曲量。优选地，满足-3.42≤f2/f≤-1.52。
条件式(2)规定了第一透镜厚度与第一第二透镜空气间隔的比值，在 条件式范围内有助于压缩光学系统总长，实现超薄化效果。优选地，满足10.50≤d1/d2≤35.00。
条件式(3)规定了第三透镜的形状，在此范围内时，随着超薄广角化的发展，有利于补正轴外画角的像差。
条件式(4)规定了第五透镜物侧面曲率半径与第五透镜厚度的比值，在条件式范围内有助于提高光学系统性能。优选地，满足R9/d9≤-15.09。
条件式(5)规定了第一透镜的形状，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。
定义第二透镜的像侧面的曲率半径为R4，摄像光学镜头整体的焦距为f，满足下列关系式：1.50≤R4/f≤10.00，规定了第二透镜像侧面曲率半径与系统总焦距的比值，在条件式范围内有助于提高光学系统性能。
本实施方式中，第一透镜L1的物侧面于近轴处为凸面，其像侧面于近轴处为凸面。
定义第一透镜L1焦距f1，摄像光学镜头整体的焦距为f，满足下列关系式：0.36≤f1/f≤1.33，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正屈折力，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。优选地，满足0.58≤f1/f≤1.06。
定义第一透镜L1的物侧面的曲率半径为R1，第一透镜L1的像侧面的曲率半径为R2，满足下列关系式：-1.87≤(R1+R2)/(R1-R2)≤-0.55，合理控制第一透镜的形状，使得第一透镜能够有效地校正系统球差，优选地，满足-1.17≤(R1+R2)/(R1-R2)≤-0.69。
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：0.12≤d1/TTL≤0.46，在条件式范围内，有利于实现超薄化。优选地，满足0.19≤d1/TTL≤0.37。
本实施方式中，第二透镜L2的物侧面于近轴处为凹面，其像侧面于近轴处为凹面。
定义第二透镜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：-1.58≤(R3+R4)/(R3-R4)≤3.01，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。优选地，满足-0.99≤(R3+R4)/(R3-R4)≤2.41。
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≤0.08，在条件式范围内，有利于实现超薄化。优选地，满足0.03≤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，其像侧面于近轴处为凹面。
定义第三透镜L3的焦距为f3，摄像光学镜头10整体的焦距为f，满足下列关系式：-8.11≤f3/f≤-1.23，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。优选地，满足-5.07≤f3/f≤-1.54。
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：0.02≤d5/TTL≤0.12，在条件式范围内，有利于实现超薄化。优选地，满足0.04≤d5/TTL≤0.09。
本实施方式中，第四透镜L4的物侧面于近轴处为凸面，其像侧面于近轴处为凸面。
定义第四透镜L4的焦距为f4，摄像光学镜头10整体的焦距为f，满足下列关系式：0.32≤f4/f≤1.49，规定了第四透镜焦距与系统焦距的比值，在条件式范围内有助于提高光学系统性能。优选地，满足0.52≤f4/f≤1.19。
定义第四透镜L4物侧面的曲率半径为R7，第四透镜L4像侧面的曲率半径为R8，满足下列关系式：-0.75≤(R7+R8)/(R7-R8)≤0.65，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。优选地，满足-0.47≤(R7+R8)/(R7-R8)≤0.52。
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：0.05≤d7/TTL≤0.45，在条件式范围内，有利于实现超薄化。优选地，满足0.08≤d7/TTL≤0.36。
本实施方式中，第五透镜L5的物侧面于近轴处为凹面，其像侧面于近轴处为凹面。
定义第五透镜L5的焦距为f5，摄像光学镜头10整体的焦距为f，满足下列关系式：-1.36≤f5/f≤-0.41，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。优选地，满足-0.85≤f5/f≤-0.51。
第五透镜L5的物侧面的曲率半径为R9，第五透镜L5的像侧面的曲率半径为R10，满足下列关系式：0.38≤(R9+R10)/(R9-R10)≤1.37，规定了第五透镜L5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。优选地，满足0.61≤(R9+R10)/(R9-R10)≤1.09。
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≤0.24，在条件式范围内，有利于实现超薄化。优选地，满足0.04≤d9/TTL≤0.20。
在本实施方式中，摄像光学镜头的光学总长为TTL，摄像光学镜头的像高为IH，满足下列条件式：TTL/IH≤2.00，从而实现超薄化。
本实施方式中，摄像光学镜头10的光圈Fno数小于或等于3.17，从而实现大光圈，成像性能好。优选地，满足Fno≤3.11。
在本实施方式中，摄像光学镜头10的焦距为f，第一透镜L1与第二透镜L2的组合焦距为f12，满足下列关系式：0.49≤f12/f≤1.81，在条件式范围内，可消除摄像光学镜头10的像差与歪曲，且可压制摄像光学镜 头10后焦距，维持影像镜片系统组小型化。优选地，满足0.78≤f12/f≤1.45。
此外，本实施方式提供的摄像光学镜头10中，各透镜的表面可以设置为非球面，非球面容易制作成球面以外的形状，获得较多的控制变数，用以消减像差，进而缩减透镜使用的数目，因此可以有效降低摄像光学镜头10的总长度。在本实施方式中，各个透镜的物侧面和像侧面均为非球面。
值得一提的是，由于第一透镜L1、第二透镜L2、第三透镜L3、第四透镜L4、第五透镜L5具有如前的结构和参数关系，因此，摄像光学镜头10能够合理分配各透镜的光焦度、间隔和形状，并因此校正了各类像差。
另外，各透镜的物侧面和像侧面中的至少一个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。
以下示出了图1所示的摄像光学镜头10的设计数据。
表1列出了本发明第一实施方式中构成摄像光学镜头10的第一透镜L1～第五透镜L5的物侧面曲率半径和像侧面曲率半径R、各透镜的轴上厚度、相邻两透镜间的距离d、折射率nd及阿贝数νd。需要说明的是，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：光学长度(第1透镜L1的物侧面到成像面的轴上距离)，单位为mm。
【表1】
Figure PCTCN2020077788-appb-000001
上表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：光学过滤片GF的物侧面的曲率半径；
R12：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的像侧面到光学过滤片GF的物侧面的轴上距离；
d11：光学过滤片GF的轴上厚度；
d12：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；
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；
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 PCTCN2020077788-appb-000002
在表2中，k是圆锥系数，A4、A6、A8、A10、A12、A14、A16、A18、A20是非球面系数。
IH：像高
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示出本实施例的摄像光学镜头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。“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 0      
P1R2 3 0.575 0.765 0.815
P2R1 2 0.545 0.775  
P2R2 1 0.875    
P3R1 1 0.225    
P3R2 1 0.215    
P4R1 2 0.495 1.195  
P4R2 2 0.455 0.835  
P5R1 1 0.925    
P5R2 2 0.385 1.885  
【表4】
  驻点个数 驻点位置1 驻点位置2
P1R1 0    
P1R2 0    
P2R1 2 0.705 0.795
P2R2 1 0.915  
P3R1 1 0.485  
P3R2 1 0.445  
P4R1 2 0.825 1.275
P4R2 0    
P5R1 0    
P5R2 1 0.875  
另外，在后续的表13中，还列出了第一实施方式中各种参数与条件式中已规定的参数所对应的值。
图2、图3分别示出了波长为436nm、486nm、546nm、588nm及656nm的光经过摄像光学镜头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546nm的光经过摄像光学镜头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。
在本实施方式中，摄像光学镜头10的入瞳直径为1.410mm，全视场像高为2.589mm，对角线方向的视场角为77.20°，超薄，且具有优秀的光学特征。
(第二实施方式)
图5是第二实施方式中摄像光学镜头20的结构示意图，第二实施方式与第一实施方式基本相同，以下列表中符号含义与第一实施方式也相同，故对于相同的部分此处不再赘述，以下仅列出不同点。
第二透镜L2的物侧面于近轴处为凸面。
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 PCTCN2020077788-appb-000003
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 PCTCN2020077788-appb-000004
表7、表8示出摄像光学镜头20中各透镜的反曲点及驻点设计数据。
【表7】
Figure PCTCN2020077788-appb-000005
Figure PCTCN2020077788-appb-000006
【表8】
  驻点个数 驻点位置1 驻点位置2 驻点位置3
P1R1 0      
P1R2 0      
P2R1 3 0.125 0.635 0.745
P2R2 0      
P3R1 1 0.505    
P3R2 2 0.635 1.095  
P4R1 2 0.535 1.165  
P4R2 0      
P5R1 0      
P5R2 1 1.165    
另外，在后续的表13中，还列出了第二实施方式中各种参数与条件式中已规定的参数所对应的值。
图6、图7分别示出了波长为436nm、486nm、546nm、588nm及656nm的光经过摄像光学镜头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546nm的光经过摄像光学镜头20后的场曲及畸变示意图。图8的场曲S是弧矢方向的场曲，T是子午方向的场曲。
在本实施方式中，摄像光学镜头20的入瞳直径为1.380mm，全视场像高为2.589mm，对角线方向的视场角为62.48°，超薄，且具有优秀的光学特征。
(第三实施方式)
图9是第三实施方式中摄像光学镜头30的结构示意图，第三实施方式与第一实施方式基本相同，以下列表中符号含义与第一实施方式也相同，故对于相同的部分此处不再赘述，以下仅列出不同点。
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 PCTCN2020077788-appb-000007
Figure PCTCN2020077788-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 PCTCN2020077788-appb-000009
表11、表12示出摄像光学镜头30中各透镜的反曲点及驻点设计数据。
【表11】
  反曲点个数 反曲点位置1 反曲点位置2 反曲点位置3 反曲点位置4
P1R1 0        
P1R2 2 0.705 0.785    
P2R1 1 0.695      
P2R2 0        
P3R1 1 0.135      
P3R2 1 0.195      
P4R1 3 0.235 0.465 0.625  
P4R2 2 0.565 1.025    
P5R1 2 1.005 1.355    
P5R2 2 0.465 2.105    
【表12】
  驻点个数 驻点位置1 驻点位置2
P1R1 0    
P1R2 0    
P2R1 1 0.735  
P2R2 0    
P3R1 1 0.245  
P3R2 1 0.415  
P4R1 1 0.805  
P4R2 0    
P5R1 0    
P5R2 1 1.305  
另外，在后续的表13中，还列出了第三实施方式中各种参数与条件式中已规定的参数所对应的值。
图10、图11分别示出了波长为436nm、486nm、546nm、588nm及656nm的光经过摄像光学镜头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546nm的光经过摄像光学镜头30后的场曲及畸变示意图。图12的场曲S是弧矢方向的场曲，T是子午方向的场曲。
在本实施方式中，摄像光学镜头10的入瞳直径为1.410mm，全视场像高为2.589mm，对角线方向的视场角为71.72°，超薄，且具有优秀的光学特征。
以下表13根据上述条件式列出了第一实施方式、第二实施方式、第三实施方式、第四实施方式中对应条件式的数值，以及其他相关参数的取值。
【表13】
Figure PCTCN2020077788-appb-000010
Figure PCTCN2020077788-appb-000011
以上所述的仅是本发明的实施方式，在此应当指出，对于本领域的普通技术人员来说，在不脱离本发明创造构思的前提下，还可以做出改进，但这些均属于本发明的保护范围。

Claims (10)

  1. 一种摄像光学镜头，其特征在于，由物侧至像侧依次包括：具有正屈折力的第一透镜、具有负屈折力的第二透镜、具有负屈折力的第三透镜、具有正屈折力的第四透镜及具有负屈折力的第五透镜；
    其中，所述第二透镜的焦距为f2，所述摄像光学镜头整体的焦距为f，所述第一透镜的轴上厚度为d1，所述第一透镜的像侧面到所述第二透镜的物侧面的轴上距离为d2，所述第三透镜的物侧面的曲率半径为R5，所述第三透镜的像侧面的曲率半径为R6，所述第五透镜的物侧面的曲率半径为R9，所述第五透镜的轴上厚度为d9，所述第一透镜的物侧面的曲率半径为R1，所述第一透镜的像侧面的曲率半径为R2，且满足下列关系式：
    -3.50≤f2/f≤-1.50；
    10.00≤d1/d2≤35.00；
    1.80≤(R5+R6)/(R5-R6)≤8.00；
    R9/d9≤-15.00；
    -30.00≤R2/R1≤-10.00。
  2. 根据权利要求1所述的摄像光学镜头，其特征在于，所述第二透镜的像侧面的曲率半径为R4，且满足下列关系式：
    1.50≤R4/f≤10.00。
  3. 根据权利要求1所述的摄像光学镜头，其特征在于，所述第一透镜的焦距为f1，所述第一透镜的物侧面的曲率半径为R1，所述第一透镜的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：
    0.36≤f1/f≤1.33；
    -1.87≤(R1+R2)/(R1-R2)≤-0.55；
    0.12≤d1/TTL≤0.46。
  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的曲率半径为R3，所述第二透镜的像侧面的曲率半径为R4，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：
    -1.58≤(R3+R4)/(R3-R4)≤3.01；
    0.02≤d3/TTL≤0.08。
  5. 根据权利要求1所述的摄像光学镜头，其特征在于，所述第三透镜的焦距为f3，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：
    -8.11≤f3/f≤-1.23；
    0.02≤d5/TTL≤0.12。
  6. 根据权利要求1所述的摄像光学镜头，其特征在于，所述第四透镜的焦距为f4，所述第四透镜的物侧面的曲率半径为R7，所述第四透镜的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，且满足下列关系式：
    0.32≤f4/f≤1.49；
    -0.75≤(R7+R8)/(R7-R8)≤0.65；
    0.05≤d7/TTL≤0.45。
  7. 根据权利要求1所述的摄像光学镜头，其特征在于，所述第五透镜的焦距为f5，所述第五透镜的像侧面的曲率半径为R10，所述摄像光学镜头的光学总长为TTL，且满足下列关系式：
    -1.36≤f5/f≤-0.41；
    0.38≤(R9+R10)/(R9-R10)≤1.37；
    0.03≤d9/TTL≤0.24。
  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光学总长为TTL，所述摄像光学镜头的像高为IH，且满足下列关系式：TTL/IH≤2.00。
  9. 根据权利要求1所述的摄像光学镜头，其特征在于，所述第一透镜与所述第二透镜的组合焦距为f12，满足下列关系式：0.49≤f12/f≤1.81。
  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光圈F数为Fno，且满足下列关系式：Fno≤3.17。
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