WO2021119892A1 - 摄像光学镜头 - Google Patents

摄像光学镜头 Download PDF

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Publication number
WO2021119892A1
WO2021119892A1 PCT/CN2019/125498 CN2019125498W WO2021119892A1 WO 2021119892 A1 WO2021119892 A1 WO 2021119892A1 CN 2019125498 W CN2019125498 W CN 2019125498W WO 2021119892 A1 WO2021119892 A1 WO 2021119892A1
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Prior art keywords
lens
imaging optical
curvature
optical lens
ttl
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PCT/CN2019/125498
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English (en)
French (fr)
Inventor
赵青
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诚瑞光学(常州)股份有限公司
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Priority to PCT/CN2019/125498 priority Critical patent/WO2021119892A1/zh
Publication of WO2021119892A1 publication Critical patent/WO2021119892A1/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
    • 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 -
    • 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

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 lenses traditionally mounted on mobile phone cameras mostly adopt a three-element or four-element lens structure.
  • the pixel area of the photosensitive device continues to shrink, and the system's requirements for image quality continue to increase, the five-element lens structure gradually appears in the lens design, and it is common Although the five-element lens has good optical performance, its optical power, lens pitch and lens shape settings are still unreasonable, resulting in the lens structure having good optical performance, but cannot meet the requirements of large aperture, Ultra-thin design requirements.
  • the purpose of the present invention is to provide an imaging optical lens, which aims to solve the problems of large aperture and insufficient ultra-thinning of the traditional imaging optical lens.
  • 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 positive refractive power, and A fourth lens with positive refractive power and a fifth lens with negative refractive power; wherein the overall focal length of the imaging optical lens is f, the focal length of the second lens is f2, and the focal length of the fourth lens is f4,
  • 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 curvature radius of the object side surface of the second lens is R3, and the image side surface of the second lens
  • the radius of curvature of the fifth lens is R4, 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, and the image side of the second lens is to the object of the third lens.
  • the on-axis distance of the side surface is d4, the on-axis thickness of the third lens is d5, and satisfies the following relationship: -2.10 ⁇ f2/f ⁇ -1.50; 0.85 ⁇ f4/f ⁇ 1.20; -2.50 ⁇ (R1+ R2)/(R1-R2) ⁇ -1.10; 0.40 ⁇ (R9+R10)/(R9-R10) ⁇ 1.00; 1.00 ⁇ d4/d5 ⁇ 1.50; 1.00 ⁇ (R3+R4)/(R3-R4) ⁇ 1.50.
  • the focal length of the third lens is f3, and satisfies the following relationship: 3.00 ⁇ f3/f ⁇ 7.00.
  • the focal length of the first lens is f1
  • the on-axis thickness of the first lens is d1
  • the total optical length of the imaging optical lens is TTL, and the following relationship is satisfied: 0.36 ⁇ f1/f ⁇ 1.57; 0.07 ⁇ d1/TTL ⁇ 0.21.
  • the axial thickness of the second lens is d3, and the total optical length of the imaging optical lens is TTL, and the following relationship is satisfied: 0.02 ⁇ d3/TTL ⁇ 0.07.
  • the radius of curvature of the object side surface of the third lens is R5
  • the radius of curvature of the image side surface of the third lens is R6
  • the total optical length of the imaging optical lens is TTL, and the following relationship is satisfied: -11.18 ⁇ (R5+R6)/(R5-R6) ⁇ 14.47; 0.03 ⁇ d5/TTL ⁇ 0.14.
  • the radius of curvature of the object side surface of the fourth lens is R7
  • the radius of curvature of the image side surface of the fourth lens is R8,
  • the axial thickness of the fourth lens is d7
  • the optical The total length is TTL and satisfies the following relationship: 0.23 ⁇ (R7+R8)/(R7-R8) ⁇ 1.38; 0.06 ⁇ d7/TTL ⁇ 0.19.
  • 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 relationship is satisfied: -1.35 ⁇ f5/f ⁇ - 0.38; 0.03 ⁇ d9/TTL ⁇ 0.11.
  • the image height of the imaging optical lens is IH
  • the total optical length of the imaging optical lens is TTL, and the following relationship is satisfied: TTL/IH ⁇ 1.35.
  • the aperture number of the imaging optical lens is FNO, and the following relational expression is satisfied: FNO ⁇ 2.50.
  • the combined focal length of the first lens and the second lens is f12, and satisfies the following relationship: 0.57 ⁇ f12/f ⁇ 2.58.
  • the camera optical lens provided by the present invention meets the design requirements of large aperture, wide-angle and ultra-thin, while having good optical performance, and is particularly suitable for mobile phone camera lens components and camera lens components composed of high-pixel CCD, CMOS and other imaging elements. WEB camera lens.
  • 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;
  • FIG. 13 is a schematic diagram of the structure of an imaging optical lens of a 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.
  • 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, they are 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 positive refractive power; the fourth lens L4 has positive refractive power; the fifth lens L5 has negative refractive power .
  • the focal length of the entire imaging optical lens is defined as f
  • the focal length of the second lens is f2
  • the focal length of the fourth lens is f4
  • 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 R2 is R3
  • the radius of curvature of the image side surface of the second lens is R4
  • the radius of curvature of the object side surface of the fifth lens is R9
  • the radius of curvature of the image side surface of the fifth lens is R10
  • the on-axis distance from the image side of the second lens to the object side of the third lens is d4, and the on-axis thickness of the third lens is d5, which satisfies the following relationship:
  • conditional formula (1) specifies the ratio of the focal length of the second lens L2 to the total focal length, which helps to improve the imaging quality within the range of conditions.
  • Conditional formula (2) When f4/f satisfies the condition, the optical power of the fourth lens L4 can be effectively allocated, the aberration of the optical system can be corrected, and the imaging quality can be improved.
  • the conditional expression (3) specifies the shape of the first lens L1. Within the range specified by the conditional expression, the degree of deflection of the light passing through the lens can be alleviated, and aberrations can be effectively reduced.
  • conditional formula (4) specifies the shape of the fifth lens L5. Within the range specified by the conditional formula, the degree of deflection of the light passing through the lens can be alleviated, and aberrations can be effectively reduced.
  • Conditional expression (6) stipulates the shape of the second lens L2, which contributes to aberration correction within the conditional range and improves the imaging quality.
  • the focal length of the third lens L3 as f3
  • the overall focal length of the imaging optical lens as f, which satisfies the following relationship: 3.00 ⁇ f3/f ⁇ 7.00, which specifies the ratio of the focal length of the third lens L3 to the total focal length.
  • the focal length of the first lens L1 as f1
  • the overall focal length of the imaging optical lens as f
  • 0.36 ⁇ f1/f ⁇ 1.57 which specifies the ratio of the positive refractive power 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.
  • 0.57 ⁇ f1/f ⁇ 1.26 is satisfied.
  • 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: 0.07 ⁇ d1/TTL ⁇ 0.21.
  • 0.11 ⁇ d1/TTL ⁇ 0.17 is satisfied.
  • the on-axis thickness of the second lens L2 is defined as d3, and the total optical length of the imaging optical lens 10 is TTL, which satisfies the following relational expression: 0.02 ⁇ d3/TTL ⁇ 0.07. Within the range of the conditional expression, it is beneficial to realize ultra-thinness. Preferably, 0.04 ⁇ d3/TTL ⁇ 0.06 is satisfied.
  • the radius of curvature of the object side surface of the third lens L3 as R5
  • the radius of curvature of the image side surface of the third lens L3 as R6, which satisfies the following relationship: -11.18 ⁇ (R5+R6)/(R5-R6) ⁇ 14.47, which is specified
  • the shape of the third lens is within the range specified by the conditional formula, which can alleviate the degree of deflection of light passing through the lens and effectively reduce aberrations.
  • it satisfies -6.99 ⁇ (R5+R6)/(R5-R6) ⁇ 11.58.
  • the axial thickness of the third lens L3 is d5, and the total optical length of the imaging optical lens 10 is TTL, which satisfies the following relationship: 0.03 ⁇ d5/TTL ⁇ 0.14. Within the range of the conditional expression, it is beneficial to realize ultra-thinness. Preferably, 0.04 ⁇ d5/TTL ⁇ 0.11 is satisfied.
  • the curvature radius of the fourth lens L4 is defined as R7, and the curvature radius of the image side of the fourth lens L4 is R8, which satisfies the following relationship: 0.23 ⁇ (R7+R8)/(R7-R8) ⁇ 1.38, which stipulates the fourth
  • R7 the curvature radius of the image side of the fourth lens L4
  • R8 which satisfies the following relationship: 0.23 ⁇ (R7+R8)/(R7-R8) ⁇ 1.38, which stipulates the fourth
  • 0.37 ⁇ (R7+R8)/(R7-R8) ⁇ 1.10 is satisfied.
  • the axial thickness of the fourth lens L4 is d7, and the total optical length of the imaging optical lens 10 is TTL, which satisfies the following relational expression: 0.06 ⁇ d7/TTL ⁇ 0.19. Within the range of the conditional expression, it is beneficial to realize ultra-thinness. Preferably, 0.09 ⁇ d7/TTL ⁇ 0.15 is satisfied.
  • the focal length f5 of the fifth lens L5 and the overall focal length of the imaging optical lens is f, which satisfies the following relationship: -1.35 ⁇ f5/f ⁇ -0.38.
  • the limitation on the fifth lens L5 can effectively make the light angle of the imaging lens smooth. Reduce tolerance sensitivity.
  • -0.84 ⁇ f5/f ⁇ -0.47 is satisfied.
  • the axial thickness of the fifth lens L5 is d9, and the total optical length of the imaging optical lens 10 is TTL, which satisfies the following relational expression: 0.03 ⁇ d9/TTL ⁇ 0.11. Within the range of the conditional expression, it is beneficial to realize ultra-thinness. Preferably, 0.06 ⁇ d9/TTL ⁇ 0.09 is satisfied.
  • the combined focal length of the first lens L1 and the second lens L2 is defined as f12, which satisfies the following relational expression: 0.57 ⁇ f12/f ⁇ 2.58.
  • the aberration of the imaging optical lens 10 can be eliminated And distortion, and can suppress the back focal length of the camera optical lens 10, maintaining the miniaturization of the image lens system group.
  • it satisfies 0.91 ⁇ f12/f ⁇ 2.07.
  • the image height of the overall imaging optical lens 10 is IH, which satisfies the following conditional formula: TTL/IH ⁇ 1.35, thereby facilitating the realization of ultra-thinness.
  • the F-number FNO of the imaging optical lens 10 is less than or equal to 2.50. Large aperture, good imaging performance.
  • 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 be reasonable The power, spacing, and shape of each lens are allocated, and various aberrations are corrected accordingly.
  • the imaging optical lens 10 can not only have good optical imaging performance, but also meet the design requirements of large aperture, wide-angle, and ultra-thinness.
  • 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.
  • 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 axial 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 in this embodiment, the units of R and d are both millimeters (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.
  • the first embodiment satisfies various conditional expressions.
  • 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.
  • 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 entrance pupil diameter of the imaging optical lens 10 is 1.508 mm, the full field of view image height is 3.282 mm, and the diagonal field angle is 80.00°, so that the imaging optical lens 10 has a large aperture and wide angle.
  • Ultra-thin, its on-axis and off-axis chromatic aberrations are fully corrected, and it 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.
  • 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.
  • Table 17 also lists the values corresponding to the various parameters in the second embodiment and the parameters specified in the conditional expressions. Obviously, the imaging optical lens of this embodiment satisfies the above-mentioned conditional expressions. .
  • FIG. 6 and 7 respectively show schematic diagrams of axial aberration and chromatic aberration of magnification after light with wavelengths of 650 nm, 610 nm, 555 nm, 510 nm, 470 nm, and 430 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 555 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 entrance pupil diameter of the imaging optical lens 20 is 1.507mm, the full-field image height is 3.282mm, and the diagonal field angle is 80.00°, so that the imaging optical lens 20 has a large aperture and wide angle.
  • Ultra-thin, its on-axis and off-axis chromatic aberrations are fully corrected, and it 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 axial aberration and chromatic aberration of magnification after light with wavelengths of 650 nm, 610 nm, 555 nm, 510 nm, 470 nm, and 430 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 555 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
  • T is the curvature of field in the meridional direction.
  • the entrance pupil diameter of the imaging optical lens 30 is 1.506 mm, the full-field image height is 3.282 mm, and the diagonal field angle is 80.00°, so that the imaging optical lens 30 has a large aperture , Wide-angle, ultra-thin, its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.
  • FIG. 13 is a schematic diagram of the structure of the imaging optical lens 40 in the fourth embodiment.
  • the fourth 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 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 design data of the inflection point and stagnation point of each lens in the imaging optical lens 40.
  • FIG. 14 and 15 respectively show schematic diagrams of axial aberration and chromatic aberration of magnification after light with wavelengths of 650 nm, 610 nm, 555 nm, 510 nm, 470 nm, and 430 nm pass through the imaging optical lens 40.
  • FIG. 16 shows a schematic diagram of field curvature and distortion of light with a wavelength of 555 nm after passing through the imaging optical lens 40.
  • the curvature of field S in FIG. 16 is the curvature of field in the sagittal direction, and T is the curvature of field in the meridional direction.
  • the entrance pupil diameter of the imaging optical lens 10 is 1.5076 mm
  • the full-field image height is 2.282 mm
  • the diagonal field angle is 80.00°, so that the imaging optical lens 40 has a large aperture , Wide-angle, ultra-thin, its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.
  • Table 17 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, and the values of other related parameters.
  • Example 1 Example 2 Example 3 Example 4 f2/f -1.51 -2.10 -2.09 -1.81 f4/f 1.19 0.94 0.85 0.99 (R1+R2)/(R1-R2) -1.10 -2.00 -2.50 -1.48 (R9+R10)/(R9-R10) 1.00 0.85 0.40 0.88 d4/d5 1.01 1.49 1.20 1.13 (R3+R4)/(R3-R4) 1.01 1.50 1.49 1.12 f 3.740 3.739 3.740 3.739 f1 2.684 3.543 3.924 3.141 f2 -5.647 -7.844 -7.811 -6.784 f3 26.141 11.548 11.256 20.629 f4 4.466 3.522 3.186 3.696 f5 -2.517 -2.119 -2.318 -2.292 f12 4.270 5.458 6.439 4.939 Fno 2.48 2.48 2.48 2.48 2.48 2.48
  • Fno is the aperture F number of the imaging optical lens.

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Abstract

本发明提供了一种摄像光学镜头，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、具有正屈折力的第三透镜、具有正屈折力的第四透镜及具有负屈折力的第五透镜，且满足以下关系式：-2.10≤f2/f≤-1.50；0.85≤f4/f≤1.20；-2.50≤(R1+R2)/(R1-R2)≤-1.10；0.40≤(R9+R10)/(R9-R10)≤1.00；1.00≤d4/d5≤1.50；1.00≤(R3+R4)/(R3-R4)≤1.50。该摄像光学镜头在具有良好的光学性能的同时，还满足大光圈、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】
随着摄像技术的发展，摄像光学镜头被广泛地应用在各式各样的电子产品中，例如智能手机、数码相机等。为方便携带，人们越来越追求电子产品的轻薄化，因此，具备良好成像品质的小型化摄像光学镜头俨然成为目前市场的主流。
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。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，五片式透镜结构逐渐出现在镜头设计当中，常见的五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，无法满足大光圈、超薄化的设计要求。
因此，有必要提供一种具有良好的光学性能且满足大光圈、超薄化设计要求的摄像光学镜头。
【发明内容】
本发明的目的在于提供一种摄像光学镜头，旨在解决传统的摄像光学镜头大光圈、超薄化不充分的问题。
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、具有正屈折力的第三透镜、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，所述摄像光学镜头整体的焦距为f，所述第二透镜的焦距为f2，所述第四透镜的焦距为f4，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，所述第五透镜的物侧面的曲率半径为R9，所述第五透镜的像侧面的曲率半径为R10，所述第二透镜的像侧面到所述第三透镜的物侧面的轴上距离为d4，所述第三透镜的轴上厚度为d5，且满足下列关系式：-2.10≤f2/f≤-1.50；0.85≤f4/f≤1.20；-2.50≤(R1+R2)/(R1-R2)≤-1.10；0.40≤(R9+R10)/(R9-R10)≤1.00；1.00≤d4/d5≤1.50；1.00≤(R3+R4)/(R3-R4)≤1.50。
优选地，所述第三透镜的焦距为f3，且满足下列关系式：3.00≤f3/f≤ 7.00。
优选地，所述第一透镜的焦距为f1，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：0.36≤f1/f≤1.57；0.07≤d1/TTL≤0.21。
优选地，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：0.02≤d3/TTL≤0.07。
优选地，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，所述摄像光学镜头的光学总长为TTL，且满足下列关系式：-11.18≤(R5+R6)/(R5-R6)≤14.47；0.03≤d5/TTL≤0.14。
优选地，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：0.23≤(R7+R8)/(R7-R8)≤1.38；0.06≤d7/TTL≤0.19。
优选地，所述第五透镜的焦距为f5，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：-1.35≤f5/f≤-0.38；0.03≤d9/TTL≤0.11。
优选地，所述摄像光学镜头的像高为IH，所述摄像光学镜头的光学总长为TTL，且满足下列关系式：TTL/IH≤1.35。
优选地，所述摄像光学镜头的光圈数为FNO，且满足下列关系式：FNO≤2.50。
优选地，所述第一透镜与所述第二透镜的组合焦距为f12，且满足下列关系式：0.57≤f12/f≤2.58。
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，满足大光圈、广角化和超薄化的设计要求,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；
图13是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】
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具有正屈折力；第四透镜L4具有正屈折力；第五透镜L5具有负屈折力。
在此，定义摄像光学镜头整体的焦距为f，第二透镜的焦距为f2，第四透镜的焦距为f4，第一透镜的物侧面的曲率半径为R1，第一透镜的像侧面的曲率半径为R2，第二透镜的物侧面的曲率半径为R3，第二透镜的像侧面的曲率半径为R4，第五透镜的物侧面的曲率半径为R9，第五透镜的像侧面的曲率半径为R10，第二透镜的像侧面到第三透镜的物侧面的轴上距离为d4，第三透镜的轴上厚度为d5，满足下列关系式：
-2.10≤f2/f≤-1.50                                      (1)
0.85≤f4/f≤1.20                                        (2)
-2.50≤(R1+R2)/(R1-R2)≤-1.10                           (3)
0.40≤(R9+R10)/(R9-R10)≤1.00                           (4)
1.00≤d4/d5≤1.50                                       (5)
1.00≤(R3+R4)/(R3-R4)≤1.50                             (6)
其中，条件式(1)规定了第二透镜L2的焦距与总焦距的比值，在条 件范围内有助于提高成像质量。
条件式(2)当f4/f满足条件时，可有效分配第四透镜L4的光焦度，对光学系统的像差进行校正，进而提升成像品质。
条件式(3)规定了第一透镜L1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。
条件式(4)规定了第五透镜L5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。
条件式(5)当d4/d5满足条件时，有助于镜片加工和系统组装。
条件式(6)规定了第二透镜L2形状，在条件范围内有助于像差校正，提高成像质量。
定义第三透镜L3的焦距为f3，摄像光学镜头整体的焦距为f，满足下列关系式：3.00≤f3/f≤7.00，规定了第三透镜L3焦距与总焦距的比值，在条件范围内有助于减小像差，提高像质。
定义第一透镜L1的焦距为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≤1.57，规定了第一透镜L1的正屈折力与整体焦距的比值。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0.57≤f1/f≤1.26。
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：0.07≤d1/TTL≤0.21，在条件式范围内，有利于实现超薄化。优选地，满足0.11≤d1/TTL≤0.17。
定义第二透镜L2的轴上厚度为d3，摄像光学镜头10的光学总长为TTL，满足下列关系式：0.02≤d3/TTL≤0.07，在条件式范围内，有利于实现超薄化。优选地，满足0.04≤d3/TTL≤0.06。
定义第三透镜L3的物侧面的曲率半径为R5，第三透镜L3的像侧面的曲率半径为R6，满足下列关系式：-11.18≤(R5+R6)/(R5-R6)≤14.47，规定了第三透镜的形状，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。优选地，满足-6.99≤(R5+R6)/(R5-R6)≤11.58。
第三透镜L3的轴上厚度为d5，摄像光学镜头10的光学总长为TTL，满足下列关系式：0.03≤d5/TTL≤0.14，在条件式范围内，有利于实现超薄化。优选地，满足0.04≤d5/TTL≤0.11。
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：0.23≤(R7+R8)/(R7-R8)≤1.38，规定了第四透镜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0.37≤(R7+R8)/(R7-R8)≤1.10。
第四透镜L4的轴上厚度为d7，摄像光学镜头10的光学总长为TTL，满足下列关系式：0.06≤d7/TTL≤0.19，在条件式范围内，有利于实现超薄化。优选地，满足0.09≤d7/TTL≤0.15。
定义第五透镜L5焦距f5，摄像光学镜头整体的焦距为f，满足下列关 系式：-1.35≤f5/f≤-0.38，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。优选地，满足-0.84≤f5/f≤-0.47。
第五透镜L5的轴上厚度为d9，摄像光学镜头10的光学总长为TTL，满足下列关系式：0.03≤d9/TTL≤0.11，在条件式范围内，有利于实现超薄化。优选地，满足0.06≤d9/TTL≤0.09。
定义所述第一透镜L1与所述第二透镜L2的组合焦距为f12，满足下列关系式：0.57≤f12/f≤2.58，在条件式范围内，可消除所述摄像光学镜头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。优选的，满足0.91≤f12/f≤2.07。
在本实施方式中，整体摄像光学镜头10的像高为IH，满足下列条件式：TTL/IH≤1.35，从而有利于实现超薄化。
本实施方式中，摄像光学镜头10的光圈F数FNO小于或等于2.50。大光圈，成像性能好。
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具有如前所述的结构和参数关系，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。
如此，摄像光学镜头10实现了在具有良好光学成像性能的同时，还能满足大光圈、广角化、超薄化的设计要求。
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。
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、各透镜的轴上厚度以及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，本实施方式中，R与d的单位均为毫米(mm)。
【表1】
Figure PCTCN2019125498-appb-000001
Figure PCTCN2019125498-appb-000002
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 PCTCN2019125498-appb-000003
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 0.315 0.515 0.565
P2R1 0      
P2R2 0      
P3R1 1 0.765    
P3R2 1 0.875    
P4R1 3 0.365 1.225 1.605
P4R2 2 1.185 1.805  
P5R1 2 1.145 2.275  
P5R2 3 0.465 2.395 2.625
【表4】
  驻点个数 驻点位置1 驻点位置2
P1R1 0    
P1R2 1 0.695  
P2R1 0    
P2R2 0    
P3R1 0    
P3R2 0    
P4R1 1 0.505  
P4R2 0    
P5R1 2 2.195 2.325
P5R2 1 1.125  
另外，在后续的表17中，还列出了第一、二、三、四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。
如表17所示，第一实施方式满足各条件式。
图2、图3分别示出了波长为650nm、610nm、555nm、510nm、470nm 和430nm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555nm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，所述摄像光学镜头10的入瞳直径为1.508mm，全视场像高为3.282mm，对角线方向的视场角为80.00°，使得摄像光学镜头10大光圈、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)
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。
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 PCTCN2019125498-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 PCTCN2019125498-appb-000005
Figure PCTCN2019125498-appb-000006
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】
  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 3 0.325 0.525 0.695  
P2R1 3 0.125 0.525 0.735  
P2R2 0        
P3R1 1 0.095      
P3R2 1 0.835      
P4R1 2 0.485 1.355    
P4R2 4 0.965 1.195 1.565 1.905
P5R1 4 0.985 1.545 1.775 2.275
P5R2 2 0.425 2.395    
【表8】
  驻点个数 驻点位置1 驻点位置2 驻点位置3
P1R1 0      
P1R2 1 0.765    
P2R1 3 0.205 0.665 0.775
P2R2 0      
P3R1 1 0.165    
P3R2 0      
P4R1 1 0.765    
P4R2 0      
P5R1 0      
P5R2 1 1.195    
另外，在后续的表17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，显然，本实施方式的摄像光学镜头满足上述的条件式。。
图6、图7分别示出了波长为650nm、610nm、555nm、510nm、470nm和430nm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555nm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，所述摄像光学镜头20的入瞳直径为1.507mm，全视场像高为3.282mm，对角线方向的视场角为80.00°，使得摄像光学镜头20大光圈、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)
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 PCTCN2019125498-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 PCTCN2019125498-appb-000008
Figure PCTCN2019125498-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 1 0.785      
P1R2 3 0.425 0.575 0.665  
P2R1 3 0.115 0.555 0.755  
P2R2 0        
P3R1 1 0.295      
P3R2 2 0.275 0.965    
P4R1 4 0.515 1.385 1.795 1.955
P4R2 2 1.345 1.905    
P5R1 2 1.165 2.245    
P5R2 2 0.595 2.465    
【表12】
  驻点个数 驻点位置1 驻点位置2 驻点位置3
P1R1 0      
P1R2 1 0.755    
P2R1 3 0.185 0.715 0.765
P2R2 0      
P3R1 1 0.535    
P3R2 1 0.505    
P4R1 1 0.825    
P4R2 0      
P5R1 0      
P5R2 1 1.335    
另外，在后续的表17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。显然，本实施方式的摄像光学镜头满足上述的条件式。
图10、图11分别示出了波长为650nm、610nm、555nm、510nm、470nm和430nm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555nm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，所述摄像光学镜头30的入瞳直径为1.506mm，全视场像高为3.282mm，对角线方向的视场角为80.00°，使得所述摄像光学镜 头30大光圈、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)
图13是第四实施方式中摄像光学镜头40的结构示意图，第四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 PCTCN2019125498-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 PCTCN2019125498-appb-000011
Figure PCTCN2019125498-appb-000012
表15、表16示出摄像光学镜头40中各透镜的反曲点及驻点设计数据。
【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 反曲点位置4
P1R1 0        
P1R2 1 0.655      
P2R1 2 0.065 0.445    
P2R2 0        
P3R1 1 0.775      
P3R2 1 0.855      
P4R1 3 0.475 1.375 1.685  
P4R2 4 1.025 1.135 1.555 1.855
P5R1 2 1.045 2.225    
P5R2 3 0.465 2.375 2.515  
【表16】
  驻点个数 驻点位置1 驻点位置2
P1R1 0    
P1R2 0    
P2R1 2 0.115 0.575
P2R2 0    
P3R1 0    
P3R2 0    
P4R1 1 0.725  
P4R2 0    
P5R1 0    
P5R2 1 1.125  
另外，在后续的表17中，还列出了第四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。显然，本实施方式的摄像光学镜头满足上述的条件式。
图14、图15分别示出了波长为650nm、610nm、555nm、510nm、470nm和430nm的光经过摄像光学镜头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的光经过摄像光学镜头40后的场曲及畸变示意图。图16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，所述摄像光学镜头10的入瞳直径为1.5076mm，全视场像高为2.282mm，对角线方向的视场角为80.00°，使得所述摄像光学 镜头40大光圈、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。
以下表17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17】
参数及条件式 实施例1 实施例2 实施例3 实施例4
f2/f -1.51 -2.10 -2.09 -1.81
f4/f 1.19 0.94 0.85 0.99
(R1+R2)/(R1-R2) -1.10 -2.00 -2.50 -1.48
(R9+R10)/(R9-R10) 1.00 0.85 0.40 0.88
d4/d5 1.01 1.49 1.20 1.13
(R3+R4)/(R3-R4) 1.01 1.50 1.49 1.12
f 3.740 3.739 3.740 3.739
f1 2.684 3.543 3.924 3.141
f2 -5.647 -7.844 -7.811 -6.784
f3 26.141 11.548 11.256 20.629
f4 4.466 3.522 3.186 3.696
f5 -2.517 -2.119 -2.318 -2.292
f12 4.270 5.458 6.439 4.939
Fno 2.48 2.48 2.48 2.48
其中，Fno为摄像光学镜头的光圈F数。
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、具有正屈折力的第三透镜、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，所述摄像光学镜头整体的焦距为f，所述第二透镜的焦距为f2，所述第四透镜的焦距为f4，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，所述第五透镜的物侧面的曲率半径为R9，所述第五透镜的像侧面的曲率半径为R10，所述第二透镜的像侧面到所述第三透镜的物侧面的轴上距离为d4，所述第三透镜的轴上厚度为d5，且满足下列关系式：
    -2.10≤f2/f≤-1.50；
    0.85≤f4/f≤1.20；
    -2.50≤(R1+R2)/(R1-R2)≤-1.10；
    0.40≤(R9+R10)/(R9-R10)≤1.00；
    1.00≤d4/d5≤1.50；
    1.00≤(R3+R4)/(R3-R4)≤1.50。
  2. 根据权利要求1所述的摄像光学镜头，其特征在于，所述第三透镜的焦距为f3，且满足下列关系式：
    3.00≤f3/f≤7.00。
  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：
    0.36≤f1/f≤1.57；
    0.07≤d1/TTL≤0.21。
  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：
    0.02≤d3/TTL≤0.07。
  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，所述摄像光学镜头的光学总长为TTL，且满足下列关系式：
    -11.18≤(R5+R6)/(R5-R6)≤14.47；
    0.03≤d5/TTL≤0.14。
  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：
    0.23≤(R7+R8)/(R7-R8)≤1.38；
    0.06≤d7/TTL≤0.19。
  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：
    -1.35≤f5/f≤-0.38；
    0.03≤d9/TTL≤0.11。
  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像高为IH，所述摄像光学镜头的光学总长为TTL，且满足下列关系式：
    TTL/IH≤1.35。
  9. 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数为FNO，且满足下列关系式：
    FNO≤2.50。
  10. 根据权利要求1所述的摄像光学镜头，其特征在于，所述第一透镜与所述第二透镜的组合焦距为f12，且满足下列关系式：0.57≤f12/f≤2.58。
PCT/CN2019/125498 2019-12-16 2019-12-16 摄像光学镜头 WO2021119892A1 (zh)

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CN105892013A (zh) * 2016-04-08 2016-08-24 瑞声科技(新加坡)有限公司 摄像镜头
CN206684372U (zh) * 2017-04-18 2017-11-28 浙江舜宇光学有限公司 成像镜头
CN108873263A (zh) * 2018-02-09 2018-11-23 瑞声声学科技(深圳)有限公司 摄像镜头
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CN110501806A (zh) * 2019-08-16 2019-11-26 瑞声通讯科技(常州)有限公司 摄像光学镜头

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CN105892013A (zh) * 2016-04-08 2016-08-24 瑞声科技(新加坡)有限公司 摄像镜头
CN206684372U (zh) * 2017-04-18 2017-11-28 浙江舜宇光学有限公司 成像镜头
CN108873263A (zh) * 2018-02-09 2018-11-23 瑞声声学科技(深圳)有限公司 摄像镜头
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