WO2021127825A1 - 摄像光学镜头 - Google Patents

摄像光学镜头 Download PDF

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Publication number
WO2021127825A1
WO2021127825A1 PCT/CN2019/127350 CN2019127350W WO2021127825A1 WO 2021127825 A1 WO2021127825 A1 WO 2021127825A1 CN 2019127350 W CN2019127350 W CN 2019127350W WO 2021127825 A1 WO2021127825 A1 WO 2021127825A1
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lens
imaging optical
curvature
radius
optical lens
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PCT/CN2019/127350
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English (en)
French (fr)
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孙伟
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诚瑞光学(常州)股份有限公司
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Priority to PCT/CN2019/127350 priority Critical patent/WO2021127825A1/zh
Publication of WO2021127825A1 publication Critical patent/WO2021127825A1/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
    • 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 pixel size of photosensitive devices has been reduced, and the development trend of current electronic products with good functions, thin and short appearance, therefore, has a good
  • the miniaturized camera lens with image quality has become the mainstream in the current market.
  • the lenses traditionally mounted on mobile phone cameras often adopt three-element, four-element, or even five-element or six-element lens structures.
  • 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, Design requirements for ultra-thin and wide-angle.
  • the object of the present invention is to provide an imaging optical lens, which has good optical performance and meets the design requirements of large aperture, ultra-thin, and wide-angle.
  • An imaging optical lens which includes a first lens, a second lens, a third lens, a fourth lens, and a fifth lens in order from the object side to the image side; wherein 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 overall focal length of the imaging optical lens is f, the focal length of the second lens is f2, the focal length of the fifth lens is f5, and the focal length of the fifth lens is f5.
  • the focal length of the four 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 is R2, and 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, and satisfies the following relationship: 0.20 ⁇ (R9+R10)/(R9-R10) ⁇ 1.00; -3.20 ⁇ (f2+f5)/f ⁇ -2.00; 0.88 ⁇ f4/f ⁇ 1.20; -2.50 ⁇ (R1+R2)/(R1-R2) ⁇ -1.00; -1.90 ⁇ R5/R6 ⁇ -0.80.
  • the on-axis 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 following relationship is satisfied: 4.00 ⁇ d1/d2 ⁇ 8.00.
  • 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: 0.38 ⁇ f1/f ⁇ 1.45; 0.06 ⁇ d1/TTL ⁇ 0.21.
  • the radius of curvature of the object side surface of the second lens is R3, the radius of curvature of the image side surface of the second lens is R4, the axial thickness of the second lens is d3, and the total optical length of the imaging optical lens is TTL, and satisfies the following relationship: -5.16 ⁇ f2/f ⁇ -0.92; -0.24 ⁇ (R3+R4)/(R3-R4) ⁇ 4.54; 0.02 ⁇ d3/TTL ⁇ 0.07.
  • 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: 1.47 ⁇ f3/f ⁇ 6.53; -0.22 ⁇ (R5+R6)/(R5-R6) ⁇ 0.47; 0.04 ⁇ d5/TTL ⁇ 0.15.
  • 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: 0.64 ⁇ (R7+R8)/(R7-R8) ⁇ 2.53; 0.05 ⁇ d7/TTL ⁇ 0.20.
  • 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: -1.34 ⁇ f5/f ⁇ - 0.39; 0.04 ⁇ d9/TTL ⁇ 0.13.
  • the total optical length of the imaging optical lens is TTL
  • the image height of the imaging optical lens is IH
  • the aperture F number of the imaging optical lens is less than or equal to 2.15.
  • the field of view of the imaging optical lens is FOV, and satisfies the following relationship: FOV ⁇ 80°.
  • the imaging optical lens according to the present invention has good optical performance, and has the characteristics of large aperture, wide angle, and ultra-thinness, and is especially suitable for mobile phones composed of high-pixel CCD, CMOS and other imaging elements.
  • Camera lens assembly and WEB camera lens are examples of the imaging optical lens according to the present invention.
  • 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.
  • the present invention provides an imaging optical lens 10 according to the 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 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
  • the overall focal length of the imaging optical lens 10 is f
  • the second The focal length of the lens L2 is f2
  • the focal length of the fifth lens L5 is f5
  • the focal length of the fourth lens L4 is f4
  • the radius of curvature of the object side surface of the first lens L1 is R1
  • the curvature radius of the object side surface of the third lens L3 is R5
  • the curvature radius of the image side surface of the third lens L3 is R6, which satisfies the following relationship:
  • conditional expression (1) specifies the shape of the fifth lens L5. 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.
  • the focal lengths of the second lens and the fifth lens can be effectively allocated, which is beneficial to improve the optical performance.
  • Conditional formula (3) stipulates the ratio of the focal length of the fourth lens to the total focal length, which can help aberration correction within the condition range and improve the imaging quality.
  • Conditional expression (4) stipulates that the shape of the first lens is specified. Within the range specified by the conditional expression, the degree of deflection of light passing through the lens can be relaxed, and aberrations can be effectively reduced.
  • conditional expression (5) it is advantageous to the processing of the third lens.
  • the on-axis thickness of the first lens is defined as 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 following relationship is satisfied: 4.00 ⁇ d1/d2 ⁇ 8.00.
  • the first lens L1 has a positive refractive power
  • the focal length of the first lens L1 is f1, which satisfies the following relationship: 0.38 ⁇ f1/f ⁇ 1.45, which specifies the positive refractive power and the overall focal length of the first lens L1 Ratio.
  • 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.
  • the conditional expression 0.61 ⁇ f1/f ⁇ 1.16 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: 0.06 ⁇ d1/TTL ⁇ 0.21, which is conducive to achieving ultra-thinness.
  • the second lens L2 has a negative refractive power
  • the focal length of the entire imaging optical lens 10 is f
  • the focal length of the second lens L2 is f2 which satisfies the following relational expression: -5.16 ⁇ f2/f ⁇ -0.92.
  • the negative refractive power of the second lens L2 is controlled within a reasonable range, which is beneficial to correct the aberration of the optical system.
  • the curvature radius of the object side surface of the second lens L2 is R3, and the curvature radius of the image side surface of the second lens L2 is R4, which satisfies the following relationship: -0.24 ⁇ (R3+R4)/(R3-R4) ⁇ 4.54, which specifies the second
  • the on-axis thickness of the second lens L2 is d3, which satisfies the following relationship: 0.02 ⁇ d3/TTL ⁇ 0.07, which is beneficial to realize ultra-thinness.
  • the third lens L3 has a positive refractive power
  • the overall focal length of the imaging optical lens is f
  • the focal length of the third lens L3 is f3, which satisfies the following relationship: 1.47 ⁇ f3/f ⁇ 6.53,
  • the system has better imaging quality and lower sensitivity.
  • the curvature radius of the object side surface of the third lens L3 is R5, and the curvature radius of the image side surface of the third lens L3 is R6, which satisfies the following relationship: -0.22 ⁇ (R5+R6)/(R5-R6) ⁇ 0.47, which specifies the third
  • the shape of the lens within the range specified by the conditional formula, can ease the degree of deflection of light passing through the lens and effectively reduce aberrations.
  • the on-axis thickness of the third lens L3 is d5, which satisfies the following relationship: 0.04 ⁇ d5/TTL ⁇ 0.15, which is beneficial to realize ultra-thinness.
  • the fourth lens L4 has positive refractive power, the curvature radius of the object side surface of the fourth lens L4 is R7, and the curvature radius of the image side surface of the fourth lens L4 is R8, which satisfies the following relationship: 0.64 ⁇ (R7+R8)/(R7-R8 ) ⁇ 2.53, which specifies the shape of the fourth lens L4.
  • R7 the curvature radius of the object side surface of the fourth lens L4
  • R8 the curvature radius of the image side surface of the fourth lens L4
  • it is beneficial to correct the aberration of the off-axis angle of view.
  • the on-axis thickness of the fourth lens L4 is d7, which satisfies the following relationship: 0.05 ⁇ d7/TTL ⁇ 0.20, which is beneficial to realize ultra-thinness.
  • the fifth lens L5 has negative refractive power, and the focal length of the fifth lens L5 is f5, which satisfies the following relationship: -1.34 ⁇ f5/f ⁇ -0.39.
  • the limitation on the fifth lens L5 can effectively make the light angle of the imaging lens gentle and reduce Tolerance sensitivity.
  • the on-axis thickness of the fifth lens L5 is d9, which satisfies the following relationship: 0.04 ⁇ d9/TTL ⁇ 0.13, which is beneficial to realize ultra-thinness.
  • the total optical length of the imaging optical lens is TTL
  • the image height of the imaging optical lens is IH
  • TTL/IH ⁇ 1.30 thereby achieving ultra-thinness
  • the aperture Fno of the imaging optical lens 10 is less than or equal to 2.15. Large aperture, good imaging performance.
  • the field of view of the imaging optical lens 10 is greater than or equal to 80°, so as to realize the wide-angle of the imaging optical lens.
  • the imaging optical lens 10 can have good optical performance, and at the same time, it can meet the requirements of large aperture, wide-angle, and ultra-thinness. Design requirements: According to the characteristics of the optical lens 10, the optical lens 10 is particularly suitable for mobile phone camera lens components and WEB camera lenses composed of high-pixel CCD, CMOS and other imaging elements.
  • 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 imaging surface), the unit is mm;
  • the object side and/or the image side of the lens can also be provided with inflection points and/or stagnation points to meet high-quality imaging requirements.
  • inflection points and/or stagnation points for specific implementations, refer to the following.
  • 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 the distance between two adjacent lenses.
  • 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 curvature radius of the object side surface of the glass plate GF
  • R12 the radius of curvature of the image side surface of the glass plate GF
  • d the on-axis thickness of each lens or the on-axis distance between two adjacent lenses
  • 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 glass plate GF;
  • d11 the axial thickness of the glass plate GF
  • nd1 the refractive index of the first lens L1;
  • nd2 the refractive index of the second lens L2
  • nd3 the refractive index of the third lens L3;
  • nd4 the refractive index of the fourth lens L4
  • nd5 the refractive index of the fifth lens L5;
  • ndg the refractive index of the glass plate GF
  • vg Abbe number of glass plate GF.
  • Table 2 shows the aspheric surface data of each lens in the imaging optical lens 10 of the first embodiment of the present invention.
  • k is the conic coefficient
  • A4, A6, A8, A10, A12, A14, A16, A18, 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 the embodiment of the present invention.
  • P1R1 and P2R2 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 surface and the image side surface of the fourth lens L4, respectively.
  • P5R1 and P5R2 represent the object side surface and the image side surface 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 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 imaging optical lens 10 has an entrance pupil diameter of 1.769mm, a full field of view image height of 3.384mm, a diagonal field of view angle of 80.00°, a large aperture, wide angle, 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. Therefore, the same parts will not be repeated here. List the differences.
  • 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.
  • 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 435 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 imaging optical lens 20 has an entrance pupil diameter of 1.768mm, a full field of view image height of 3.384mm, a diagonal field of view angle of 80.00°, a large aperture, wide angle, 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. Therefore, the same parts will not be repeated here. List the differences.
  • 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.
  • Table 17 also lists the values corresponding to the various parameters in the third embodiment and the parameters specified in the conditional expressions.
  • 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 435 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 imaging optical lens 30 has an entrance pupil diameter of 1.768mm, a full field of view image height of 3.384mm, a diagonal field of view angle of 80.00°, large aperture, wide angle, ultra-thin, and 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. Therefore, the same parts will not be repeated here. List the differences.
  • Table 13 and Table 14 show design data of 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.
  • Table 17 also lists the values of the various parameters in the third embodiment and the parameters that have been specified in the conditional expressions.
  • FIG. 13 and 14 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 435 nm pass through the imaging optical lens 40.
  • FIG. 15 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
  • T is the curvature of field in the meridional direction.
  • the imaging optical lens 40 has an entrance pupil diameter of 1.769 mm, a full field of view image height of 3.384 mm, a diagonal field of view angle of 80.00°, large aperture, wide angle, ultra-thin, and Has excellent optical characteristics.
  • Table 17 lists the values of the corresponding conditional expressions in the first embodiment, the second embodiment, and the third embodiment, and the values of other related parameters according to the above-mentioned conditional expressions.
  • Example 1 Example 2
  • Example 3 Example 4 (R9+R10)/(R9-R10) 0.92 0.20 1.00 0.70 (f2+f5)/f -2.44 -2.00 -3.20 -2.04 f4/f 1.08 0.96 0.88 1.20 (R1+R2)/(R1-R2) -1.60 -1.48 -2.50 -1.02 R5/R6 -1.17 -1.90 -0.80 -1.49 f 3.750 3.748 3.749 3.750 f1 3.245 2.969 3.613 2.838 f2 -6.616 -5.334 -9.677 -5.151 f3 16.317 11.022 15.235 14.174 f4 4.060 3.579 3.300 4.496 f5 -2.516 -2.165 -2.319 -2.484 FNO 2.12 2.12 2.12 2.12 f12 5.255 5.238 4.992 5.127

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Abstract

一种摄像光学镜头(10)，由物侧至像侧依次包括：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)；其中，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，摄像光学镜头(10)整体的焦距为f，第二透镜(L2)的焦距为f2，第五透镜(L5)的焦距为f5，第四透镜(L4)的焦距为f4，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，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，且满足下列关系式：0.20≤(R9+R10)/(R9-R10)≤1.00；-3.20≤(f2+f5)/f≤-2.00；0.88≤f4/f≤1.20；-2.50≤(R1+R2)/(R1-R2)≤-1.00；-1.90≤R5/R6≤-0.80。摄像光学镜头(10)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】
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-OxideSemiconductor 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、四片式甚至是五片式、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，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、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，满足大光圈、超薄化、广角化的设计要求。
本发明的技术方案如下：
提供一种摄像光学镜头，由物侧至像侧依次包括：第一透镜、第二透镜、第三透镜、第四透镜及第五透镜；其中，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，所述第五透镜的焦距为f5，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，且满足下列关系式： 0.20≤(R9+R10)/(R9-R10)≤1.00；-3.20≤(f2+f5)/f≤-2.00；0.88≤f4/f≤1.20；-2.50≤(R1+R2)/(R1-R2)≤-1.00；-1.90≤R5/R6≤-0.80。
优选地，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，且满足下列关系式：4.00≤d1/d2≤8.00。
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：0.38≤f1/f≤1.45；0.06≤d1/TTL≤0.21。
优选地，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：-5.16≤f2/f≤-0.92；-0.24≤(R3+R4)/(R3-R4)≤4.54；0.02≤d3/TTL≤0.07。
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：1.47≤f3/f≤6.53；-0.22≤(R5+R6)/(R5-R6)≤0.47；0.04≤d5/TTL≤0.15。
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：0.64≤(R7+R8)/(R7-R8)≤2.53；0.05≤d7/TTL≤0.20。
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：-1.34≤f5/f≤-0.39；0.04≤d9/TTL≤0.13。
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≤1.30。
优选地，所述摄像光学镜头的光圈F数小于或等于2.15。
优选地，所述摄像光学镜头的视场角为FOV，且满足下列关系式：FOV≥80°。
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，且具有大光圈、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】
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。
(实施方式一)
请一并参阅图1至图4，本发明提供了实施方式一的摄像光学镜头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。
在此，定义所述第五透镜L5的物侧面的曲率半径为R9，所述第五透镜L5的像侧面的曲率半径为R10，所述摄像光学镜头10整体的焦距为f， 所述第二透镜L2的焦距为f2，所述第五透镜L5的焦距为f5，所述第四透镜L4的焦距为f4，所述第一透镜L1的物侧面的曲率半径为R1，所述第一透镜L1的像侧面的曲率半径为R2，所述第三透镜L3的物侧面的曲率半径为R5，所述第三透镜L3的像侧面的曲率半径为R6，满足下列关系式：
0.20≤(R9+R10)/(R9-R10)≤1.00；                          (1)
-3.20≤(f2+f5)/f≤-2.00；                                   (2)
0.88≤f4/f≤1.20；                                          (3)
-2.50≤(R1+R2)/(R1-R2)≤-1.00；                             (4)
-1.90≤R5/R6≤-0.80                                       (5)
其中，条件式(1)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。
当满足条件式(2)时，可有效分配第二透镜、第五透镜焦距，有利于提高光学性能。
条件式(3)规定了规定了第四透镜焦距与总焦距的比值，在条件范围内可有助于像差校正，提升成像品质。
条件式(4)规定了规定了第一透镜形状，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。
满足条件式(5)时，有利于第三透镜的加工。
在本实施方式中，定义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，且满足下列关系式：4.00≤d1/d2≤8.00。当d1/d2满足条件时，有助于压缩系统总长，实现系统超薄化。
在本实施方式中，第一透镜L1具有正屈折力，第一透镜L1的焦距为f1，满足下列关系式：0.38≤f1/f≤1.45，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，满足条件式0.61≤f1/f≤1.16。
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：0.06≤d1/TTL≤0.21，有利于实现超薄化。优选地，0.10≤d1/TTL≤0.17。
在本实施方式中，第二透镜L2具有负屈折力，摄像光学镜头10整体的焦距为f第二透镜L2的焦距为f2，满足下列关系式：-5.16≤f2/f≤-0.92，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。优选地，-3.23≤f2/f≤-1.14。
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：-0.24≤(R3+R4)/(R3-R4)≤4.54，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，-0.15≤(R3+R4)/(R3-R4)≤3.63。
第二透镜L2的轴上厚度为d3，满足下列关系式：0.02≤d3/TTL≤0.07，有利于实现超薄化。优选地，0.04≤d3/TTL≤0.06。
在本实施方式中，所述第三透镜L3具有正屈折力，所述摄像光学镜头整体的焦距为f，第三透镜L3的焦距为f3，满足下列关系式：1.47≤f3/f≤6.53，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，2.35≤f3/f≤5.22。
第三透镜L3物侧面的曲率半径为R5，第三透镜L3像侧面的曲率半径为R6，满足下列关系式：-0.22≤(R5+R6)/(R5-R6)≤0.47，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，-0.14≤(R5+R6)/(R5-R6)≤0.37。
第三透镜L3的轴上厚度为d5，满足下列关系式：0.04≤d5/TTL≤0.15，有利于实现超薄化。优选地，0.06≤d5/TTL≤0.12。
第四透镜L4具有正屈折力，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：0.64≤(R7+R8)/(R7-R8)≤2.53，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，1.02≤(R7+R8)/(R7-R8)≤2.02。
第四透镜L4的轴上厚度为d7，满足下列关系式：0.05≤d7/TTL≤0.20，有利于实现超薄化。优选地，0.07≤d7/TTL≤0.16。
第五透镜L5具有负屈折力，第五透镜L5焦距f5，满足下列关系式：-1.34≤f5/f≤-0.39，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，-0.84≤f5/f≤-0.48。
第五透镜L5的轴上厚度为d9，满足下列关系式：0.04≤d9/TTL≤0.13，有利于实现超薄化。优选地，0.06≤d9/TTL≤0.10。
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，且满足下列关系式：TTL/IH≤1.30，从而可实现超薄化。
本实施方式中，摄像光学镜头10的光圈Fno小于或等于2.15。大光圈，成像性能好。
本实施例中摄像光学镜头10的视场角大于或等于80°，从而实现摄像光学镜头的广角化。
当本发明所述摄像光学镜头10的焦距、各透镜的焦距和曲率半径满足上述关系式时，可以使摄像光学镜头10具有良好光学性能，同时能够满足了大光圈、广角化、超薄化的设计要求；根据该光学镜头10的特性，该光学镜头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。
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的物侧面到成像面的轴上距离)，单位为mm；
优选的，所述透镜的物侧面和/或像侧面上还可以设置有反曲点和/或驻点，以满足高品质的成像需求，具体的可实施方案，参下所述。
以下示出了图1所示的摄像光学镜头10的设计数据。
表1列出了本发明实施方式一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，本实施方式中，R与d的单位均为毫米(mm)。
【表1】
Figure PCTCN2019127350-appb-000001
Figure PCTCN2019127350-appb-000002
上表中各符号的含义如下。
R：光学面的曲率半径、透镜时为中心曲率半径；
S1：光圈；
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:玻璃平板GF的物侧面的曲率半径；
R12:玻璃平板GF的像侧面的曲率半径；
d：各透镜的轴上厚度或相邻两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的像侧面到玻璃平板GF的物侧面的轴上距离；
d11：玻璃平板GF的轴上厚度；
d12：玻璃平板GF的像侧面到像面Si的轴上距离；
nd：折射率；
nd1：第一透镜L1的折射率；
nd2：第二透镜L2的折射率；
nd3：第三透镜L3的折射率；
nd4：第四透镜L4的折射率；
nd5：第五透镜L5的折射率；
ndg：玻璃平板GF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：玻璃平板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 PCTCN2019127350-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示出本发明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、P2R2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 1 0.795    
P2R1 3 0.175 0.465 0.735
P2R2 0      
P3R1 2 0.155 0.795  
P3R2 1 0.915    
P4R1 1 1.295    
P4R2 3 1.165 1.465 1.705
P5R1 2 1.135 2.505  
P5R2 3 0.445 2.435 2.725
【表4】
Figure PCTCN2019127350-appb-000004
Figure PCTCN2019127350-appb-000005
另外，在后续的表17中，还列出了实施方式一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650nm、610nm、555nm、510nm、470nm和435nm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1.769mm，全视场像高为3.384mm，对角线方向的视场角为80.00°，大光圈、广角、超薄，且具有优秀的光学特征。
(实施方式二)
图5是实施方式二中摄像光学镜头20的结构示意图，实施方式二与实施方式一基本相同，以下列表中符号含义与实施方式一也相同，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示出本发明实施方式二的摄像光学镜头20的设计数据。
【表5】
Figure PCTCN2019127350-appb-000006
Figure PCTCN2019127350-appb-000007
表6示出本发明实施方式二的摄像光学镜头20中各透镜的非球面数据。
【表6】
Figure PCTCN2019127350-appb-000008
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 PCTCN2019127350-appb-000009
Figure PCTCN2019127350-appb-000010
【表8】
  驻点个数 驻点位置1 驻点位置2
P1R1 0    
P1R2 1 0.795  
P2R1 2 0.625 0.785
P2R2 0    
P3R1 1 0.275  
P3R2 0    
P4R1 0    
P4R2 0    
P5R1 1 2.145  
P5R2 1 0.945  
另外，在后续的表17中，还列出了实施方式二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650nm、610nm、555nm、510nm、470nm和435nm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1.768mm，全视场像高为3.384mm，对角线方向的视场角为80.00°，大光圈、广角、超薄，且具有优秀的光学特征。
(实施方式三)
图9是实施方式三中摄像光学镜头30的结构示意图，实施方式三与实施方式一基本相同，以下列表中符号含义与实施方式一也相同，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示出本发明实施方式三的摄像光学镜头30的设计数据。
【表9】
Figure PCTCN2019127350-appb-000011
Figure PCTCN2019127350-appb-000012
表10示出本发明实施方式三的摄像光学镜头30中各透镜的非球面数据。
【表10】
Figure PCTCN2019127350-appb-000013
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
P1R1 0      
P1R2 1 0.705    
P2R1 3 0.275 0.425 0.695
P2R2 0      
P3R1 2 0.175 0.785  
P3R2 0      
P4R1 1 1.185    
P4R2 1 1.165    
P5R1 1 1.125    
P5R2 3 0.465 2.315 2.645
【表12】
  驻点个数 驻点位置1
P1R1 0  
P1R2 0  
P2R1 1 0.765
P2R2 0  
P3R1 1 0.295
P3R2 0  
P4R1 0  
P4R2 0  
P5R1 1 2.165
P5R2 1 1.085
另外，在后续的表17中，还列出了实施方式三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650nm、610nm、555nm、510nm、470nm和435nm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1.768mm，全视场像高为3.384mm，对角线方向的视场角为80.00°，大光圈、广角、超薄，且具有优秀的光学特征。
(实施方式四)
图13是实施方式四中摄像光学镜头40的结构示意图，实施方式四与实施方式一基本相同，以下列表中符号含义与实施方式一也相同，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示出本发明实施方式四的摄像光学镜头40的设计数据。
【表13】
Figure PCTCN2019127350-appb-000014
【表14】
Figure PCTCN2019127350-appb-000015
Figure PCTCN2019127350-appb-000016
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
P1R1 1 0.835    
P1R2 1 0.165    
P2R1 2 0.395 0.855  
P2R2 0      
P3R1 2 0.155 0.775  
P3R2 1 0.915    
P4R1 1 1.275    
P4R2 3 1.045 1.475 1.665
P5R1 1 1.165    
P5R2 2 0.405 2.425  
【表16】
  驻点个数 驻点位置1 驻点位置2
P1R1 0    
P1R2 1 0.275  
P2R1 1 0.665  
P2R2 0    
P3R1 2 0.265 0.895
P3R2 1 1.035  
P4R1 0    
P4R2 0    
P5R1 1 2.325  
P5R2 1 0.915  
另外，在后续的表17中，还列出了实施方式三中各种参数与条件式中 已规定的参数所对应的值。
图13、图14分别示出了波长为650nm、610nm、555nm、510nm、470nm和435nm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15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40的入瞳直径为1.769mm，全视场像高为3.384mm，对角线方向的视场角为80.00°，大光圈、广角、超薄，且具有优秀的光学特征。
以下表17根据上述条件式列出了实施方式一、实施方式二、实施方式三中对应条件式的数值，以及其他相关参数的取值。
【表17】
条件式及参数 实施例1 实施例2 实施例3 实施例4
(R9+R10)/(R9-R10) 0.92 0.20 1.00 0.70
(f2+f5)/f -2.44 -2.00 -3.20 -2.04
f4/f 1.08 0.96 0.88 1.20
(R1+R2)/(R1-R2) -1.60 -1.48 -2.50 -1.02
R5/R6 -1.17 -1.90 -0.80 -1.49
f 3.750 3.748 3.749 3.750
f1 3.245 2.969 3.613 2.838
f2 -6.616 -5.334 -9.677 -5.151
f3 16.317 11.022 15.235 14.174
f4 4.060 3.579 3.300 4.496
f5 -2.516 -2.165 -2.319 -2.484
FNO 2.12 2.12 2.12 2.12
f12 5.255 5.238 4.992 5.127
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：第一透镜、第二透镜、第三透镜、第四透镜及第五透镜；
    其中，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，所述第五透镜的焦距为f5，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，且满足下列关系式：
    0.20≤(R9+R10)/(R9-R10)≤1.00；
    -3.20≤(f2+f5)/f≤-2.00；
    0.88≤f4/f≤1.20；
    -2.50≤(R1+R2)/(R1-R2)≤-1.00；
    -1.90≤R5/R6≤-0.80。
  2. 根据权利要求1所述的摄像光学镜头，其特征在于，所述第一透镜的轴上厚度为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，且满足下列关系式：
    4.00≤d1/d2≤8.00。
  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：
    0.38≤f1/f≤1.45；
    0.06≤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：
    -5.16≤f2/f≤-0.92；
    -0.24≤(R3+R4)/(R3-R4)≤4.54；
    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：
    1.47≤f3/f≤6.53；
    -0.22≤(R5+R6)/(R5-R6)≤0.47；
    0.04≤d5/TTL≤0.15。
  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：
    0.64≤(R7+R8)/(R7-R8)≤2.53；
    0.05≤d7/TTL≤0.20。
  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：
    -1.34≤f5/f≤-0.39；
    0.04≤d9/TTL≤0.13。
  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≤1.30。
  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F数小于或等于2.15。
  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视场角为FOV，且满足下列关系式：
    FOV≥80°。
PCT/CN2019/127350 2019-12-23 2019-12-23 摄像光学镜头 WO2021127825A1 (zh)

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JPH07287163A (ja) * 1994-04-19 1995-10-31 Nikon Corp テレセントリックｆθレンズ
US5777797A (en) * 1995-09-11 1998-07-07 Fuji Photo Optical Co., Ltd. Objective lens system for endoscopes having an image transfer optical fiber bundle
CN102338923A (zh) * 2010-07-16 2012-02-01 大立光电股份有限公司 广视角摄像镜头
CN105259636A (zh) * 2015-10-19 2016-01-20 浙江舜宇光学有限公司 长焦镜头
CN110221411A (zh) * 2019-06-30 2019-09-10 瑞声科技(新加坡)有限公司 摄像光学镜头
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JPH07287163A (ja) * 1994-04-19 1995-10-31 Nikon Corp テレセントリックｆθレンズ
US5777797A (en) * 1995-09-11 1998-07-07 Fuji Photo Optical Co., Ltd. Objective lens system for endoscopes having an image transfer optical fiber bundle
CN102338923A (zh) * 2010-07-16 2012-02-01 大立光电股份有限公司 广视角摄像镜头
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