WO2022088087A1 - 光学成像系统、取像装置及电子装置 - Google Patents

光学成像系统、取像装置及电子装置 Download PDF

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Publication number
WO2022088087A1
WO2022088087A1 PCT/CN2020/125460 CN2020125460W WO2022088087A1 WO 2022088087 A1 WO2022088087 A1 WO 2022088087A1 CN 2020125460 W CN2020125460 W CN 2020125460W WO 2022088087 A1 WO2022088087 A1 WO 2022088087A1
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Prior art keywords
lens
imaging system
optical imaging
optical axis
optical
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PCT/CN2020/125460
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English (en)
French (fr)
Inventor
王妮妮
杨健
李明
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欧菲光集团股份有限公司
江西晶超光学有限公司
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Priority to PCT/CN2020/125460 priority Critical patent/WO2022088087A1/zh
Publication of WO2022088087A1 publication Critical patent/WO2022088087A1/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
    • G02B13/18—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 technical field of optical imaging, and in particular, to an optical imaging system, an imaging device and an electronic device.
  • the inventor found that there are at least the following problems in the prior art: the existing three-piece, four-piece and five-piece lenses have all reached corresponding technical bottlenecks, and based on the same photosensitive chip, in order to obtain Higher image definition will increase the overall length of the lens, which restricts the thinning of the lens.
  • An embodiment of the present application provides an optical imaging system, which includes sequentially along the optical axis from the object side to the image side:
  • the object side surface of the first lens is a convex surface at the near optical axis
  • optical imaging system satisfies the following relationship:
  • f is the effective focal length of the optical imaging system
  • IMGH is half of the corresponding image height of the maximum field of view of the optical imaging system
  • Y62 is the maximum effective half-aperture of the image side of the sixth lens.
  • the above-mentioned optical imaging system uses an isosceles right-angle prism to deflect the optical path by 90 degrees, which reduces the thickness of the optical imaging system, so that the electronic device equipped with the optical imaging system can meet the light and thin design; and adopts a large aperture design, Reasonable distribution of the bending force can realize the telephoto function, with lower optical performance sensitivity of the optical imaging system and better imaging quality; in addition, it can balance the longer focal length and miniaturization, ensuring a larger imaging surface and a larger imaging area.
  • the light area improves the overall brightness of the image.
  • the optical imaging system satisfies the following relationship:
  • EPD is the entrance pupil diameter of the optical imaging system
  • Y62 is the maximum effective half-diameter of the image side of the sixth lens.
  • the optical imaging system satisfies the following conditional formula:
  • ⁇ CT is the sum of the thicknesses of all the lenses of the optical imaging system on the optical axis
  • T14 is the thickness of the first lens, the second lens, the third lens and the fourth lens on the optical axis the sum of the thicknesses above.
  • the light transition is smoother, the field curvature of the optical imaging system can be corrected, and the dispersion and telephoto characteristics can be balanced.
  • the optical imaging system satisfies the following conditional formula:
  • MVd is the average value of Abbe numbers of six lenses
  • f is the effective focal length of the optical imaging system.
  • chromatic aberration can be balanced, high Abbe number and low Abbe number correspond to different refractive indices, and through the combination of different materials, the telephoto function can be realized and the optical imaging performance can be improved.
  • the optical imaging system satisfies the following conditional formula:
  • FOV is the maximum angle of view of the optical imaging system
  • f is the effective focal length of the optical imaging system
  • the angle of view can be controlled within a certain range, so that the effective focal length can reach the distance of telephoto, and the telephoto function can be realized.
  • the optical imaging system satisfies the following conditional formula:
  • TL is the distance from the object side of the first lens to the imaging surface of the optical imaging system on the optical axis
  • f is the effective focal length of the optical imaging system.
  • the optical imaging system satisfies the following conditional formula:
  • f is the effective focal length of the optical imaging system
  • f1 is the effective focal length of the first lens
  • the bending force of the first lens can be kept within a reasonable range, and the yield of the first lens forming process is improved; at the same time, the bending force of the first lens can occupy an appropriate ratio in the bending force of the optical imaging system as a whole, Conducive to stable transition of light.
  • the optical imaging system satisfies the following conditional formula:
  • SAG32 is the displacement from the intersection of the image side of the third lens on the optical axis to the position of the maximum effective radius of the image side of the third lens in the direction of the optical axis
  • CT34 is the image side of the third lens The distance from the object side of the fourth lens on the optical axis.
  • the direction change of the light entering the optical imaging system can be slowed down, which helps to reduce the intensity of stray light, reduce the optical performance sensitivity of the optical imaging system, and improve the yield of the third lens.
  • the optical imaging system satisfies the following conditional formula:
  • SAG41 is the displacement from the intersection of the object side of the fourth lens on the optical axis to the position of the maximum effective radius of the object side of the fourth lens in the direction of the optical axis
  • CT34 is the image side of the third lens The distance from the object side of the fourth lens on the optical axis.
  • the direction change of the light entering the optical imaging system can be slowed down, which helps to reduce the intensity of ghost images, reduce the optical performance sensitivity of the optical imaging system, and improve the yield of the fourth lens.
  • the optical imaging system satisfies the following conditional formula:
  • MINL5 is the minimum thickness of the fifth lens in the effective area
  • MAXL5 is the maximum thickness of the fifth lens in the effective area
  • the thickness ratio of the fifth lens is within an appropriate range, which improves the molding process yield of the fifth lens; at the same time, the aberration of the fifth lens is maintained within a reasonable range, which is conducive to eliminating the overall aberration of the optical imaging system. .
  • An embodiment of the present application provides an imaging device, including:
  • the photosensitive element is arranged on the imaging surface of the optical imaging system.
  • the optical imaging system deflects the optical path by 90 degrees through an isosceles right-angle prism, which reduces the thickness of the optical imaging system, so that the electronic device carrying the optical imaging system can meet the light and thin design;
  • Large aperture design, reasonable distribution of bending force, can achieve telephoto function, low optical performance sensitivity of optical imaging system and better imaging quality; in addition, it can balance long focal length and miniaturization to ensure a large imaging surface Satisfy the large light-receiving area and improve the overall brightness of the imaging.
  • An embodiment of the present application provides an electronic device, characterized in that it includes:
  • the imaging device is installed in the casing to acquire images.
  • the image side of the first lens and the object side of the second lens are cemented to form a cemented lens.
  • the optical imaging system deflects the optical path by 90 degrees through an isosceles right-angle prism, which reduces the thickness of the optical imaging system, so that the electronic device carrying the optical imaging system can meet the light and thin design;
  • Large aperture design, reasonable distribution of bending force, can achieve telephoto function, low optical performance sensitivity of optical imaging system and better imaging quality; in addition, it can balance long focal length and miniaturization to ensure a large imaging surface Satisfy the large light-receiving area and improve the overall brightness of the imaging.
  • FIG. 1 is a schematic structural diagram of an optical imaging system according to a first embodiment of the present invention.
  • FIG. 2 is a schematic diagram of spherical aberration, astigmatism and distortion according to the first embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram of an optical imaging system according to a second embodiment of the present invention.
  • FIG. 4 is a schematic diagram of spherical aberration, astigmatism and distortion according to the second embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of an optical imaging system according to a third embodiment of the present invention.
  • FIG. 6 is a schematic diagram of spherical aberration, astigmatism and distortion according to the third embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of an optical imaging system according to a fourth embodiment of the present invention.
  • FIG. 8 is a schematic diagram of spherical aberration, astigmatism and distortion according to the fourth embodiment of the present invention.
  • FIG. 9 is a schematic structural diagram of an optical imaging system according to a fifth embodiment of the present invention.
  • FIG. 10 is a schematic diagram of spherical aberration, astigmatism and distortion according to the fifth embodiment of the present invention.
  • FIG. 11 is a schematic structural diagram of an optical imaging system according to a sixth embodiment of the present invention.
  • FIG. 12 is a schematic diagram of spherical aberration, astigmatism and distortion according to the sixth embodiment of the present invention.
  • FIG. 13 is a schematic structural diagram of an optical imaging system according to a seventh embodiment of the present invention.
  • FIG. 14 is a schematic diagram of spherical aberration, astigmatism and distortion according to the seventh embodiment of the present invention.
  • FIG. 15 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
  • the first lens L1 The first lens L1
  • the third lens L3 is the third lens L3
  • the sixth lens L6 is the sixth lens L6
  • the optical imaging system 10 of the embodiment of the present invention sequentially includes an isosceles right-angle prism L0, a diaphragm STO, a first lens L1 with a The second lens L2, the third lens L3 having a bending power, the fourth lens L4 having a bending power, a fifth lens L5 having a bending power, and the sixth lens L6 having a bending power, wherein the optical axis LA is substantially L-shaped .
  • the isosceles right angle prism L0 has sides S1, S2 and S3, the first lens L1 has an object side S4 and an image side S5, the second lens L2 has an object side S6 and an image side S7, and the third lens L3 has an object side S8 and an image side S9, the fourth lens L4 has an object side S10 and an image side S11, the fifth lens L5 has an object side S12 and an image side S13, and the sixth lens L6 has an object side S14 and an image side S15, wherein the object side S4 of the first lens L1 Convex at the near optical axis.
  • the light incident from the outside enters the side S1 of the isosceles right-angle prism L0 along the optical axis LA, and after being turned and turned by the isosceles right-angle prism L0, it is emitted from the side S3 of the isosceles right-angle prism L0 and passes through in turn along the optical axis.
  • the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5 and the sixth lens L6 they reach the imaging surface S18.
  • optical imaging system 10 satisfies the following conditional formula:
  • f is the effective focal length of the optical imaging system 10
  • IMGH is half of the corresponding image height of the maximum field of view of the optical imaging system 10
  • Y62 is the maximum effective half aperture of the image side S12 of the sixth lens L6.
  • the above-mentioned optical imaging system 10 deflects the optical path by 90 degrees through the isosceles right angle prism L0, which reduces the thickness of the optical imaging system 10, so that the electronic device carrying the optical imaging system 10 satisfies the light and thin design;
  • the large aperture design, reasonable distribution of the bending force, can realize the telephoto function, and has lower optical performance sensitivity of the optical imaging system 10 and better imaging quality.
  • the optical imaging system 10 satisfies the following conditional formula: 10.183 ⁇ f*IMGH/Y62 ⁇ 21.095.
  • the longer focal length and miniaturization can be balanced, ensuring that the larger imaging surface meets the larger light-receiving area, and the overall brightness of the imaging is improved.
  • the range of the above conditional expression is exceeded, either the focal length of the optical imaging system 10 is long and the volume is large; or the focal length of the optical imaging system 10 is short and the volume is small, which cannot ensure that the larger imaging surface can satisfy the larger light-receiving area.
  • the optical imaging system 10 further includes an infrared filter L7, and the infrared filter L7 has an object side S16 and an image side S17.
  • the infrared filter L7 is arranged on the image side S15 of the sixth lens L6 to filter out light in other wavelength bands such as visible light, and only let the infrared light pass through, so that the optical imaging system 10 can be used in a dark environment and other special applications The scene can also be imaged.
  • the first lens L1 , the second lens L2 , the third lens L3 , the fourth lens L4 , the fifth lens L5 and the sixth lens L6 are all made of plastic.
  • the lenses made of plastic can reduce The weight of the optical imaging system 10 is reduced and the production cost is reduced.
  • the first lens L1 , the second lens L2 , the third lens L3 , the fourth lens L4 , the fifth lens L5 and the sixth lens L6 are all made of glass.
  • the optical imaging system 10 can withstand Subject to higher temperature and has better optical properties.
  • only the first lens L1 may be made of glass, and other lenses may be made of plastic.
  • the first lens L1 closest to the object side can better withstand the influence of the ambient temperature on the object side , and because other lenses are made of plastic materials, the optical imaging system 10 maintains a low production cost.
  • the material of the first lens L1 is glass, and the materials of other lenses can be arbitrarily combined.
  • the optical imaging system 10 satisfies the following relationship:
  • EPD is the entrance pupil diameter of the optical imaging system 10
  • Y62 is the maximum effective half-diameter of the image side surface S15 of the sixth lens L6.
  • the optical imaging system 10 satisfies the following conditional formula: 1.443 ⁇ EPD/Y62 ⁇ 2.329. In this way, it is possible to balance the light throughput and miniaturization, and improve the image quality. However, when the range of the above conditional expression is exceeded, the light throughput and miniaturization of the optical imaging system 10 cannot be effectively balanced, and the imaging quality is poor.
  • the optical imaging system 10 satisfies the following conditional formula:
  • ⁇ CT is the sum of the thicknesses of all the lenses of the optical imaging system 10 on the optical axis
  • T14 is the sum of the thicknesses of the first lens L1, the second lens L2, the third lens L3 and the fourth lens L4 on the optical axis .
  • the optical imaging system 10 satisfies the following conditional formula: 1.266 ⁇ CT/T14 ⁇ 1.563. In this way, by rationally arranging the spatial positions of the lenses, the transition of light can be made more gentle, and the field curvature of the optical imaging system 10 can be corrected to balance dispersion and telephoto characteristics. However, when the range of the above conditional expression is exceeded, the dispersion and telephoto characteristics of the optical imaging system 10 cannot be effectively balanced.
  • the optical imaging system 10 satisfies the following conditional formula:
  • MVd is the average value of Abbe numbers of the six lenses L6
  • f is the effective focal length of the optical imaging system 10 .
  • 3.599mm - 1 ⁇ MVd/f ⁇ 5.919mm -1 3.599mm - 1 ⁇ MVd/f ⁇ 5.919mm -1 .
  • chromatic aberration can be balanced, high Abbe number and low Abbe number correspond to different refractive indices, and through the combination of different materials, the telephoto function can be realized and the optical imaging performance can be improved.
  • the range of the above-mentioned conditional expression is exceeded, it is unfavorable to realize the telephoto characteristic of the optical imaging system 10, and the optical imaging performance is poor.
  • the optical imaging system 10 satisfies the following conditional formula:
  • FOV is the maximum field angle of the optical imaging system 10
  • f is the effective focal length of the optical imaging system 10 .
  • 1.782°/mm ⁇ FOV/f ⁇ 5.066°/mm In this way, the angle of view can be controlled within a certain range, so that the effective focal length can reach the distance of telephoto, and the telephoto function can be realized.
  • the range of the above conditional expression it is disadvantageous to control the angle of view and realize the telephoto function.
  • the optical imaging system 10 satisfies the following conditional formula:
  • TL is the distance on the optical axis from the object side S4 of the first lens L1 to the imaging surface S18 of the optical imaging system 10
  • f is the effective focal length of the optical imaging system 10 .
  • the optical imaging system 10 satisfies the following conditional formula: 0.893 ⁇ TL/f ⁇ 0.943. In this way, miniaturization and telephoto characteristics can be balanced. However, when the range of the above conditional expression is exceeded, the balance between miniaturization and telephoto characteristics is not favorable.
  • the optical imaging system 10 satisfies the following conditional formula:
  • f is the effective focal length of the optical imaging system 10
  • f1 is the effective focal length of the first lens L1.
  • the optical imaging system 10 satisfies the following conditional formula: 1.334 ⁇ f/f1 ⁇ 2.211.
  • the bending force of the first lens L1 can be kept within a reasonable range, and the yield of the molding process of the first lens L1 is improved; at the same time, the bending force of the first lens L1 can occupy an appropriate proportion of the bending force of the optical imaging system 10 as a whole.
  • the ratio is conducive to the stable transition of light. However, when the range of the above conditional expression is exceeded, it is not conducive to improving the yield of the first lens L1 forming process and the stable transition of light.
  • the optical imaging system 10 satisfies the following conditional formula:
  • SAG32 is the displacement amount in the optical axis direction from the intersection of the image side S8 of the third lens L3 on the optical axis to the maximum effective radius position of the image side S9 of the third lens L3, and CT34 is the image side S9 of the third lens L3 The distance from the object side S10 of the fourth lens L4 on the optical axis.
  • the optical imaging system 10 satisfies the following conditional formula: 0.038 ⁇
  • the direction change of the light entering the optical imaging system 10 can be slowed down, which is helpful to reduce the intensity of stray light, reduce the optical performance sensitivity of the optical imaging system, and improve the yield of the third lens L3.
  • the range of the above conditional expression is exceeded, it is unfavorable to slow down the direction change of the light entering the optical imaging system 10, and the yield of producing the third lens L3 is low.
  • the optical imaging system 10 satisfies the following conditional formula:
  • SAG41 is the displacement amount in the optical axis direction from the intersection of the object side S10 of the fourth lens L4 on the optical axis to the maximum effective radius position of the object side S10 of the fourth lens L4, and CT34 is the image side S9 of the third lens L3 The distance from the object side S10 of the fourth lens L4 on the optical axis.
  • the optical imaging system 10 satisfies the following conditional formula: 0.283 ⁇
  • the direction change of the light entering the optical imaging system 10 can be slowed down, which is helpful to reduce the intensity of ghost images, reduce the optical performance sensitivity of the optical imaging system 10, and improve the production of the finished product of the fourth lens L4. Rate.
  • the range of the above conditional expression is exceeded, it is unfavorable to slow down the direction change of the light entering the optical imaging system 10 , and the yield of producing the fourth lens L4 is low.
  • the optical imaging system 10 satisfies the following conditional formula:
  • MINL5 is the minimum thickness of the fifth lens L5 in the effective area
  • MAXL5 is the maximum thickness of the fifth lens L5 in the effective area
  • the optical imaging system 10 satisfies the following conditional formula: 0.344 ⁇ MINL5/MAXL5 ⁇ 0.778.
  • the thickness-to-thickness ratio of the fifth lens L5 is within a suitable range, which improves the molding process yield of the fifth lens L5; at the same time, the aberration of the fifth lens L5 is maintained within a reasonable range, which is conducive to eliminating the optical imaging system 10 overall aberration.
  • the range of the above conditional expression is exceeded, it is not conducive to improving the molding process yield of the fifth lens L5 and eliminating the aberration of the optical imaging system 10 as a whole.
  • the optical imaging system 10 in this embodiment includes an isosceles right-angle prism L0, a diaphragm STO, a first lens L1 with a positive inflection force, and a first lens with a positive inflection force from the object side to the image side.
  • the object side S4 of the first lens L1 is convex at the near optical axis
  • the image side S5 of the first lens L1 is concave at the near optical axis
  • the object side S6 of the second lens L2 is at the near optical axis
  • the place is convex
  • the image side S7 of the second lens L2 is convex at the near optical axis
  • the object side S8 of the third lens L3 is convex at the near optical axis
  • the image side S9 of the third lens L3 is at the near optical axis.
  • the object side S10 of the fourth lens L4 is concave at the near optical axis
  • the image side S11 of the fourth lens L4 is convex at the near optical axis
  • the object side S12 of the fifth lens L5 is concave at the near optical axis
  • the image side S13 of the fifth lens L5 is concave at the near optical axis
  • the object side S14 of the sixth lens L6 is convex at the near optical axis
  • the image side S15 of the sixth lens L6 is convex at the near optical axis.
  • the object side S4 of the first lens L1 is convex at the near circumference
  • the image side S5 of the first lens L1 is concave at the near circumference
  • the object side S6 of the second lens L2 is convex at the near circumference
  • the second lens L2 is convex at the near circumference.
  • the image side S7 is convex near the circumference
  • the object side S8 of the third lens L3 is convex near the circumference
  • the image side S9 of the third lens L3 is concave near the circumference
  • the object side S10 of the fourth lens L4 is near the circumference.
  • the circumference is concave, the image side S11 of the fourth lens L4 is convex at the near circumference; the object side S12 of the fifth lens L5 is concave at the near circumference, and the image side S13 of the fifth lens L5 is convex at the near circumference;
  • the object side surface S14 of the sixth lens L6 is a concave surface near the circumference, and the image side surface S15 of the sixth lens L6 is a convex surface near the circumference.
  • FIG. 2 is a diagram of spherical aberration (mm), astigmatism (mm) and distortion (%) of the optical imaging system 10 in the first embodiment, wherein the reference wavelengths of focal length, Abbe number and refractive index are all 587.5618nm.
  • the optical imaging system 10 in the first embodiment satisfies the conditions of the following table.
  • f is the focal length of the optical imaging system 10
  • FNO is the aperture number of the optical imaging system 10
  • FOV is the maximum field angle of the optical imaging system 10 .
  • first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5 and the sixth lens L6 are all aspherical mirrors.
  • the shape of the aspheric surface is determined by the following formula:
  • the optical imaging system 10 in this embodiment includes an isosceles right-angle prism L0, a diaphragm STO, a first lens L1 with a positive inflection force, and a second lens with a positive inflection force from the object side to the image side.
  • the object side S4 of the first lens L1 is convex at the near optical axis
  • the image side S5 of the first lens L1 is concave at the near optical axis
  • the object side S6 of the second lens L2 is at the near optical axis
  • the place is convex
  • the image side S7 of the second lens L2 is convex at the near optical axis
  • the object side S8 of the third lens L3 is convex at the near optical axis
  • the image side S9 of the third lens L3 is at the near optical axis.
  • the object side S10 of the fourth lens L4 is concave at the near optical axis
  • the image side S11 of the fourth lens L4 is convex at the near optical axis
  • the object side S12 of the fifth lens L5 is convex at the near optical axis
  • the image side S13 of the fifth lens L5 is concave at the near optical axis
  • the object side S14 of the sixth lens L6 is convex at the near optical axis
  • the image side S15 of the sixth lens L6 is concave at the near optical axis.
  • the object side S4 of the first lens L1 is convex at the near circumference
  • the image side S5 of the first lens L1 is concave at the near circumference
  • the object side S6 of the second lens L2 is convex at the near circumference
  • the second lens L2 is convex at the near circumference.
  • the image side S7 is concave at the near circumference
  • the object side S8 of the third lens L3 is convex at the near circumference
  • the image side S9 of the third lens L3 is concave at the near circumference
  • the object side S10 of the fourth lens L4 is near the circumference.
  • the circumference is concave, the image side S11 of the fourth lens L4 is convex at the near circumference; the object side S12 of the fifth lens L5 is concave at the near circumference, and the image side S13 of the fifth lens L5 is convex at the near circumference;
  • the object side surface S14 of the sixth lens L6 is a concave surface near the circumference, and the image side surface S15 of the sixth lens L6 is a convex surface near the circumference.
  • FIG. 4 is a diagram of spherical aberration (mm), astigmatism (mm) and distortion (%) of the optical imaging system 10 in the second embodiment, wherein the reference wavelengths of focal length, Abbe number and refractive index are all 587.5618nm.
  • the optical imaging system 10 in the second embodiment satisfies the conditions of the following table.
  • f is the focal length of the optical imaging system 10
  • FNO is the aperture number of the optical imaging system 10
  • FOV is the maximum field angle of the optical imaging system 10 .
  • first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5 and the sixth lens L6 are all aspherical mirrors.
  • the shape of the aspheric surface is determined by the following formula:
  • the optical imaging system 10 in this embodiment includes an isosceles right-angle prism L0, a diaphragm STO, a first lens L1 with a positive inflection force, and a second lens with a positive inflection force from the object side to the image side.
  • the object side S4 of the first lens L1 is convex at the near optical axis
  • the image side S5 of the first lens L1 is concave at the near optical axis
  • the object side S6 of the second lens L2 is at the near optical axis
  • the place is convex
  • the image side S7 of the second lens L2 is concave at the near optical axis
  • the object side S8 of the third lens L3 is concave at the near optical axis
  • the image side S9 of the third lens L3 is at the near optical axis.
  • the object side S10 of the fourth lens L4 is concave at the near optical axis
  • the image side S11 of the fourth lens L4 is convex at the near optical axis
  • the object side S12 of the fifth lens L5 is concave at the near optical axis
  • the image side S13 of the fifth lens L5 is concave at the near optical axis
  • the object side S14 of the sixth lens L6 is convex at the near optical axis
  • the image side S15 of the sixth lens L6 is convex at the near optical axis.
  • the object side S4 of the first lens L1 is convex at the near circumference
  • the image side S5 of the first lens L1 is convex at the near circumference
  • the object side S6 of the second lens L2 is concave at the near circumference
  • the second lens L2 has a concave surface.
  • the image side S7 is convex near the circumference
  • the object side S8 of the third lens L3 is convex near the circumference
  • the image side S9 of the third lens L3 is concave near the circumference
  • the object side S10 of the fourth lens L4 is near the circumference.
  • the circumference is concave, the image side S11 of the fourth lens L4 is convex at the near circumference; the object side S12 of the fifth lens L5 is concave at the near circumference, and the image side S13 of the fifth lens L5 is convex at the near circumference;
  • the object side surface S14 of the sixth lens L6 is a concave surface near the circumference, and the image side surface S15 of the sixth lens L6 is a convex surface near the circumference.
  • FIG. 6 is a diagram of spherical aberration (mm), astigmatism (mm) and distortion (%) of the optical imaging system 10 in the third embodiment, wherein the reference wavelengths of the focal length, Abbe number and refractive index are all 587.5618nm.
  • the optical imaging system 10 in the third embodiment satisfies the conditions of the following table.
  • f is the focal length of the optical imaging system 10
  • FNO is the aperture number of the optical imaging system 10
  • FOV is the maximum field angle of the optical imaging system 10 .
  • first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5 and the sixth lens L6 are all aspherical mirrors.
  • the shape of the aspheric surface is determined by the following formula:
  • the optical imaging system 10 in this embodiment includes an isosceles right-angle prism L0, a diaphragm STO, a first lens L1 with a positive inflection force, and a second lens with a positive inflection force from the object side to the image side.
  • the object side S4 of the first lens L1 is convex at the near optical axis
  • the image side S5 of the first lens L1 is concave at the near optical axis
  • the object side S6 of the second lens L2 is at the near optical axis
  • the place is convex
  • the image side S7 of the second lens L2 is convex at the near optical axis
  • the object side S8 of the third lens L3 is convex at the near optical axis
  • the image side S9 of the third lens L3 is at the near optical axis.
  • the object side S10 of the fourth lens L4 is concave at the near optical axis
  • the image side S11 of the fourth lens L4 is convex at the near optical axis
  • the object side S12 of the fifth lens L5 is concave at the near optical axis
  • the image side S13 of the fifth lens L5 is concave at the near optical axis
  • the object side S14 of the sixth lens L6 is concave at the near optical axis
  • the image side S15 of the sixth lens L6 is convex at the near optical axis.
  • the object side S4 of the first lens L1 is convex at the near circumference
  • the image side S5 of the first lens L1 is concave at the near circumference
  • the object side S6 of the second lens L2 is convex at the near circumference
  • the second lens L2 is convex at the near circumference.
  • the image side S7 is concave at the near circumference
  • the object side S8 of the third lens L3 is convex at the near circumference
  • the image side S9 of the third lens L3 is concave at the near circumference
  • the object side S10 of the fourth lens L4 is near the circumference.
  • the circumference is concave, the image side S11 of the fourth lens L4 is convex at the near circumference; the object side S12 of the fifth lens L5 is concave at the near circumference, and the image side S13 of the fifth lens L5 is convex at the near circumference;
  • the object side surface S14 of the sixth lens L6 is a concave surface near the circumference, and the image side surface S15 of the sixth lens L6 is a convex surface near the circumference.
  • FIG. 8 is a diagram of spherical aberration (mm), astigmatism (mm) and distortion (%) of the optical imaging system 10 in the fourth embodiment, wherein the reference wavelengths of focal length, Abbe number and refractive index are all 587.5618nm.
  • the optical imaging system 10 in the fourth embodiment satisfies the conditions of the following table.
  • f is the focal length of the optical imaging system 10
  • FNO is the aperture number of the optical imaging system 10
  • FOV is the maximum field angle of the optical imaging system 10 .
  • first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5 and the sixth lens L6 are all aspherical mirrors.
  • the shape of the aspheric surface is determined by the following formula:
  • the optical imaging system 10 in this embodiment includes an isosceles right-angle prism L0, a diaphragm STO, a first lens L1 with a positive inflection force, and a second lens with a positive inflection force from the object side to the image side.
  • the object side S4 of the first lens L1 is convex at the near optical axis
  • the image side S5 of the first lens L1 is convex at the near optical axis
  • the object side S6 of the second lens L2 is at the near optical axis
  • the place is concave
  • the image side S7 of the second lens L2 is convex at the near optical axis
  • the object side S8 of the third lens L3 is convex at the near optical axis
  • the image side S9 of the third lens L3 is at the near optical axis.
  • the object side S10 of the fourth lens L4 is concave at the near optical axis
  • the image side S11 of the fourth lens L4 is convex at the near optical axis
  • the object side S12 of the fifth lens L5 is concave at the near optical axis
  • the image side S13 of the fifth lens L5 is concave at the near optical axis
  • the object side S14 of the sixth lens L6 is convex at the near optical axis
  • the image side S15 of the sixth lens L6 is convex at the near optical axis.
  • the object side S4 of the first lens L1 is convex at the near circumference
  • the image side S5 of the first lens L1 is concave at the near circumference
  • the object side S6 of the second lens L2 is convex at the near circumference
  • the second lens L2 is convex at the near circumference.
  • the image side S7 is concave at the near circumference
  • the object side S8 of the third lens L3 is convex at the near circumference
  • the image side S9 of the third lens L3 is concave at the near circumference
  • the object side S10 of the fourth lens L4 is near the circumference.
  • the circumference is concave, the image side S11 of the fourth lens L4 is convex at the near circumference; the object side S12 of the fifth lens L5 is concave at the near circumference, and the image side S13 of the fifth lens L5 is convex at the near circumference;
  • the object side surface S14 of the sixth lens L6 is a concave surface near the circumference, and the image side surface S15 of the sixth lens L6 is a convex surface near the circumference.
  • FIG. 10 is a diagram of spherical aberration (mm), astigmatism (mm) and distortion (%) of the optical imaging system 10 in the fifth embodiment, wherein the reference wavelengths of focal length, Abbe number and refractive index are all 587.5618nm.
  • the optical imaging system 10 in the fifth embodiment satisfies the conditions of the following table.
  • f is the focal length of the optical imaging system 10
  • FNO is the aperture number of the optical imaging system 10
  • FOV is the maximum field angle of the optical imaging system 10 .
  • first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5 and the sixth lens L6 are all aspherical mirrors.
  • the shape of the aspheric surface is determined by the following formula:
  • the optical imaging system 10 in this embodiment includes an isosceles right-angle prism L0, a diaphragm STO, a first lens L1 with a positive inflection force, and a second lens with a positive inflection force from the object side to the image side.
  • the object side S4 of the first lens L1 is convex at the near optical axis
  • the image side S5 of the first lens L1 is concave at the near optical axis
  • the object side S6 of the second lens L2 is at the near optical axis
  • the place is convex
  • the image side S7 of the second lens L2 is convex at the near optical axis
  • the object side S8 of the third lens L3 is convex at the near optical axis
  • the image side S9 of the third lens L3 is at the near optical axis.
  • the object side S10 of the fourth lens L4 is convex at the near optical axis
  • the image side S11 of the fourth lens L4 is concave at the near optical axis
  • the object side S12 of the fifth lens L5 is concave at the near optical axis
  • the image side S13 of the fifth lens L5 is convex at the near optical axis
  • the object side S14 of the sixth lens L6 is concave at the near optical axis
  • the image side S15 of the sixth lens L6 is convex at the near optical axis.
  • the object side S4 of the first lens L1 is convex at the near circumference
  • the image side S5 of the first lens L1 is concave at the near circumference
  • the object side S6 of the second lens L2 is convex at the near circumference
  • the second lens L2 is convex at the near circumference.
  • the image side S7 is convex near the circumference
  • the object side S8 of the third lens L3 is convex near the circumference
  • the image side S9 of the third lens L3 is concave near the circumference
  • the object side S10 of the fourth lens L4 is near the circumference.
  • the circumference is concave, the image side S11 of the fourth lens L4 is convex at the near circumference; the object side S12 of the fifth lens L5 is concave at the near circumference, and the image side S13 of the fifth lens L5 is convex at the near circumference;
  • the object side surface S14 of the sixth lens L6 is a concave surface near the circumference, and the image side surface S15 of the sixth lens L6 is a convex surface near the circumference.
  • FIG. 12 is a diagram of spherical aberration (mm), astigmatism (mm) and distortion (%) of the optical imaging system 10 in the sixth embodiment, wherein the reference wavelengths of focal length, Abbe number and refractive index are all 587.5618nm.
  • the optical imaging system 10 in the sixth embodiment satisfies the conditions of the following table.
  • f is the focal length of the optical imaging system 10
  • FNO is the aperture number of the optical imaging system 10
  • FOV is the maximum field angle of the optical imaging system 10 .
  • first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5 and the sixth lens L6 are all aspherical mirrors.
  • the shape of the aspheric surface is determined by the following formula:
  • the optical imaging system 10 in this embodiment includes an isosceles right-angle prism L0, a diaphragm STO, a first lens L1 with a positive inflection force, and a second lens with a negative inflection force from the object side to the image side.
  • the object side S4 of the first lens L1 is convex at the near optical axis
  • the image side S5 of the first lens L1 is concave at the near optical axis
  • the object side S6 of the second lens L2 is at the near optical axis
  • the place is convex
  • the image side S7 of the second lens L2 is concave at the near optical axis
  • the object side S8 of the third lens L3 is convex at the near optical axis
  • the image side S9 of the third lens L3 is at the near optical axis.
  • the object side S10 of the fourth lens L4 is concave at the near optical axis
  • the image side S11 of the fourth lens L4 is convex at the near optical axis
  • the object side S12 of the fifth lens L5 is concave at the near optical axis
  • the image side S13 of the fifth lens L5 is convex at the near optical axis
  • the object side S14 of the sixth lens L6 is convex at the near optical axis
  • the image side S15 of the sixth lens L6 is concave at the near optical axis.
  • the object side S4 of the first lens L1 is convex at the near circumference
  • the image side S5 of the first lens L1 is concave at the near circumference
  • the object side S6 of the second lens L2 is convex at the near circumference
  • the second lens L2 is convex at the near circumference.
  • the image side S7 is convex near the circumference
  • the object side S8 of the third lens L3 is convex near the circumference
  • the image side S9 of the third lens L3 is concave near the circumference
  • the object side S10 of the fourth lens L4 is near the circumference.
  • the circumference is concave, the image side S11 of the fourth lens L4 is convex at the near circumference; the object side S12 of the fifth lens L5 is concave at the near circumference, and the image side S13 of the fifth lens L5 is convex at the near circumference;
  • the object side surface S14 of the sixth lens L6 is a concave surface near the circumference, and the image side surface S15 of the sixth lens L6 is a convex surface near the circumference.
  • FIG. 14 is a diagram of spherical aberration (mm), astigmatism (mm) and distortion (%) of the optical imaging system 10 in the seventh embodiment, wherein the reference wavelengths of the focal length, Abbe number and refractive index are all 587.5618nm.
  • the optical imaging system 10 in the seventh embodiment satisfies the conditions of the following table.
  • f is the focal length of the optical imaging system 10
  • FNO is the aperture number of the optical imaging system 10
  • FOV is the maximum field angle of the optical imaging system 10 .
  • first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5 and the sixth lens L6 are all aspherical mirrors.
  • shape of an aspheric surface is determined by the following formula:
  • Table 15 shows f*IMGH/Y62, EPD/Y62, ⁇ CT/T14, MVd/f, FOV/f, TL/f, f/f1 in the optical imaging systems 10 of the first to seventh embodiments ,
  • the optical imaging system 10 of the embodiment of the present invention can be applied to the imaging device 100 of the embodiment of the present invention.
  • the imaging device 100 includes the photosensitive element 20 and the optical imaging system 10 of any of the above-mentioned embodiments.
  • the photosensitive element 20 is provided on the image side of the optical imaging system 10 .
  • the photosensitive element 20 can be a complementary metal oxide semiconductor (CMOS, Complementary Metal Oxide Semiconductor) image sensor or a charge-coupled device (CCD, Charge-coupled Device).
  • CMOS complementary metal oxide semiconductor
  • CCD Charge-coupled Device
  • the imaging device 100 of the embodiment of the present invention can be applied to the electronic device 1000 of the embodiment of the present invention.
  • the electronic device 1000 includes a casing 200 and the imaging device 100 , and the imaging device 100 is installed in the casing 200 to get the image.
  • the electronic device 1000 of the embodiment of the present invention can be applied to vehicle-mounted, automatic driving and monitoring devices, wherein the electronic device 1000 includes but is not limited to a driving recorder, a smart phone, a tablet computer, a notebook computer, an electronic book reader, and a portable multimedia player (PMP), portable phones, video phones, digital still cameras, mobile medical devices, wearable devices and other electronic devices that support imaging.
  • a driving recorder a smart phone, a tablet computer, a notebook computer, an electronic book reader, and a portable multimedia player (PMP), portable phones, video phones, digital still cameras, mobile medical devices, wearable devices and other electronic devices that support imaging.
  • PMP portable multimedia player

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Abstract

一种光学成像系统(10)、取像装置(100)及电子装置(1000)，光学成像系统(10)由物侧到像侧沿光轴(LA)依次包括：棱镜(L0)；光阑(STO)；具有正曲折力的第一透镜(L1)，第一透镜(L1)的物侧面(S4)在近光轴处为凸面；具有曲折力的第二透镜(L2)；具有曲折力的第三透镜(L3)；具有曲折力的第四透镜(L4)；具有曲折力的第五透镜(L5)；及具有曲折力的第六透镜(L6)；光学成像系统(10)满足以下关系式：10≤f*IMGH/Y62≤25。光学成像系统(10)可使得装载光学成像系统(10)的电子装置(1000)满足轻薄化的设计；并且采用大光圈设计，合理分配曲折力，可实现长焦功能，具有较低的光学成像系统(10)的光学性能敏感度和较佳的成像品质；另外，可平衡较长焦距与小型化，保证较大成像面及较大收光面积，提升成像整体亮度。

Description

光学成像系统、取像装置及电子装置 技术领域
本发明涉及光学成像技术领域，尤其涉及一种光学成像系统、取像装置及电子装置。
背景技术
近年来，为了拍摄远处景象，浅景深而突出主要成像物体，并匹配高像素小尺寸芯片的各种长焦距镜头陆续出现。
在实现本发明过程中，发明人发现现有技术中至少存在如下问题：现有的三片式、四片式和五片式镜头都达到了相应的技术瓶颈，基于相同的感光芯片，为了获取更高图像清晰度会增大镜头总长，这样却制约了镜头的轻薄化。
发明内容
鉴于以上内容，有必要提出一种光学成像系统、取像装置及电子装置，以解决上述问题。
本申请之一实施例提供一种光学成像系统，由物侧到像侧沿光轴依次包括：
棱镜；
光阑；
具有正曲折力的第一透镜，所述第一透镜的物侧面在近光轴处为凸面；
具有曲折力的第二透镜；
具有曲折力的第三透镜；
具有曲折力的第四透镜；
具有曲折力的第五透镜；及
具有曲折力的第六透镜；
所述光学成像系统满足以下关系式：
10≤f*IMGH/Y62≤25；
其中，f为所述光学成像系统的有效焦距，IMGH为所述光学成像系统的最大视场角对应像高的一半，Y62为所述第六透镜的像侧面的最大有效半口径。
上述的光学成像系统通过等腰直角棱镜，将光路呈九十度偏折，减小了光学成像系统的厚度，使得装载该光学成像系统的电子装置满足轻薄化的设计；并且采用大光圈设计，合理分配曲折力，可实现长焦功能，具有较低的光学成像系统的光学性能敏感度和较佳的成像品质；另外，可平衡较长焦距与小型化，保证较大成像面及较大收光面积，提升成像整体亮度。
在一些实施例中，所述光学成像系统满足以下关系式：
1≤EPD/Y62≤3；
其中，EPD为所述光学成像系统的入瞳直径，Y62为所述第六透镜的像侧面的最大有效半口径。
如此，可平衡通光量与小型化，提升成像品质。
在一些实施例中，所述光学成像系统满足以下条件式：
1≤∑CT/T14≤2；
其中，∑CT为所述光学成像系统的所有透镜于光轴上的厚度之和，T14为所述第一透镜、所述第二透镜、所述第三透镜和所述第四透镜于光轴上的厚度之和。
如此，通过合理排布透镜空间位置，让光线过渡更为平缓，并且能够矫正光学成像系统的场曲，平衡色散与长焦特性。
在一些实施例中，所述光学成像系统满足以下条件式：
3mm -1≤MVd/f≤6mm -1；
其中，MVd为六片透镜的阿贝数的平均值，f为所述光学成像系统的有效焦距。
如此，可平衡色差，高阿贝数和低阿贝数对应不同的折射率，通过不同材料组合，可实现长焦功能，并提高光学成像性能。
在一些实施例中，所述光学成像系统满足以下条件式：
1°/mm≤FOV/f≤6°/mm；
其中，FOV为所述光学成像系统的最大视场角，f为所述光学成像系统的有效焦距。
如此，可使视场角控制在一定范围，使有效焦距达到长焦的距离，实现远摄功能。
在一些实施例中，所述光学成像系统满足以下条件式：
0≤TL/f≤1；
其中，TL为所述第一透镜的物侧面至所述光学成像系统的成像面于光轴上的距离，f为所述光学成像系统的有效焦距。
如此，可平衡小型化与长焦特性。
在一些实施例中，所述光学成像系统满足以下条件式：
1≤f/f1≤3；
其中，f为所述光学成像系统的有效焦距，f1为所述第一透镜的有效焦距。
如此，可使第一透镜的曲折力在合理的区间内，提高了第一透镜成型工艺的良率；同时使第一透镜的曲折力在光学成像系统整体的曲折力中占有合适的配比，有利于光线稳定过渡。
在一些实施例中，所述光学成像系统满足以下条件式：
0≤|SAG32|/CT34≤1；
其中，SAG32为所述第三透镜的像侧面在光轴上的交点至所述第三透镜的像侧面的最大有效半径位置于光轴方向的位移量，CT34为所述第三透镜的像侧面与所述第四透镜的物侧面于光轴上的间距。
如此，通过光学结构的合理布局，可减缓光线进入光学成像系统后的方向变化，有助于降低杂散光的强度，降低光学成像系统的光学性能敏感度，提高生产第三透镜的成品率。
在一些实施例中，所述光学成像系统满足以下条件式：
0≤|SAG41|/CT34≤1；
其中，SAG41为所述第四透镜的物侧面在光轴上的交点至所述第四透镜的物侧面的最大有效半径位置于光轴方向的位移量，CT34为所述第三透镜的像侧面与所述第四透镜的物侧面于光轴上的间距。
如此，通过光学结构的合理布局，可减缓光线进入光学成像系统后的方向变化，有助于降低鬼像的强度，降低光学成像系统的光学性能敏感度，提高生产第四透镜的成品率。
在一些实施例中，所述光学成像系统满足以下条件式：
0≤MINL5/MAXL5≤1；
其中，MINL5为所述第五透镜在有效区内的最小厚度，MAXL5为所述第五透镜在有效区内的最大厚度。
如此，第五透镜的薄厚比在合适的区间内，提高了第五透镜的成型工艺良率；同时第五透镜的像差会维持在合理地范围内，有利于消除光学成像系统整体的像差。
本申请之一实施例提供一种取像装置，包括：
上述的光学成像系统；及
感光元件，设置于所述光学成像系统的成像面。
上述的取像装置中光学成像系统通过等腰直角棱镜，将光路呈九十度偏折，减小了光学成像系统的厚度，使得装载该光学成像系统的电子装置满足轻薄化的设计；并且采用大光圈设计，合理分配曲折力，可实现长焦功能，具有较低的光学成像系统的光学性能敏感度和较佳的成像品质；另外，可平衡较长焦距与小型化，保证较大成像面满足较大收光面积，提升成像整体亮度。
本申请之一实施例提供一种电子装置，其特征在于，包括：
壳体；及
上述的取像装置，所述取像装置安装在所述壳体内以获取图像。
所述第一透镜的像侧面与所述第二透镜的物侧面胶合形成胶合透镜。
上述的取像装置中光学成像系统通过等腰直角棱镜，将光路呈九十度偏折，减小了光学成像系统的厚度，使得装载该光学成像系统的电子装置满足轻薄化的设计；并且采用大光圈设计，合理分配曲折力，可实现长焦功能，具有较低的光学成像系统的光学性能敏感度和较佳的成像品质；另外，可平衡较长焦距与小型化，保证较大成像面满足较大收光面积，提升成像整体亮度。
本发明实施例的附加方面和优点将在下面的描述中部分给出，部分将从下面的描述中变得明显，或通过本发明的实践了解到。
附图说明
本发明的上述和/或附加的方面和优点可以从结合下面附图对实施例的描述中变得明显和容易理解，其中：
图1是本发明第一实施例的光学成像系统的结构示意图。
图2是本发明第一实施例的球差、像散及畸变示意图。
图3是本发明第二实施例的光学成像系统的结构示意图。
图4是本发明第二实施例的球差、像散及畸变示意图。
图5是本发明第三实施例的光学成像系统的结构示意图。
图6是本发明第三实施例的球差、像散及畸变示意图。
图7是本发明第四实施例的光学成像系统的结构示意图。
图8是本发明第四实施例的球差、像散及畸变示意图。
图9是本发明第五实施例的光学成像系统的结构示意图。
图10是本发明第五实施例的球差、像散及畸变示意图。
图11是本发明第六实施例的光学成像系统的结构示意图。
图12是本发明第六实施例的球差、像散及畸变示意图。
图13是本发明第七实施例的光学成像系统的结构示意图。
图14是本发明第七实施例的球差、像散及畸变示意图。
图15是本发明实施例的电子装置的结构示意图。
主要元件符号说明
电子装置                           1000
取像装置                           100
光学成像系统                       10
等腰直角棱镜                       L0
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
第六透镜                           L6
红外滤光片                         L7
光阑                               STO
物侧面                             S4、S6、S8、S10、S12、S14、S16
像侧面                             S5、S7、S9、S11、S13、S15、S17
成像面                             S18
感光元件                           20
壳体                               200
具体实施方式
下面详细描述本发明的实施方式，所述实施方式的示例在附图中示出，其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施方式是示例性的，仅用于解释本发明，而不能理解为对本发明的限制。
请参见图1，本发明实施例的光学成像系统10从物侧至像侧沿光轴LA依次包括等腰直角棱镜L0、光阑STO、具有正曲折力的第一透镜L1、具有曲折力的第二透镜L2、具有曲折力的第三透镜L3、具有曲折力的第四透镜L4、具有曲折力的第五透镜L5及具有曲折力的第六透镜L6，其中光轴LA为大致为L形。
等腰直角棱镜L0具有侧面S1、S2、S3，第一透镜L1具有物侧面S4及像侧面S5，第二透镜L2具有物侧面S6及像侧面S7，第三透镜L3具有物侧面S8及像侧面S9，第四透镜L4具有物侧面S10及像侧面S11，第五透镜L5具有物侧面S12及像侧面S13，第六透镜L6具有物侧面S14及像侧面S15，其中第一透镜L1的物侧面S4在近光轴处为凸面。
成像时，从外界入射的光线沿光轴LA射入等腰直角棱镜L0的侧面S1，经等腰直角棱镜L0折转转向后从等腰直角棱镜L0的侧面S3射出并沿光轴依次经过第一透镜L1、第二透镜L2、第三透镜L3、第四透镜L4、第五透镜L5及第六透镜L6后，到达成像面S18。
光学成像系统10满足以下条件式：
10≤f*IMGH/Y62≤25；
其中，f为光学成像系统10的有效焦距，IMGH为光学成像系统10的最大视场角对应像高的一半，Y62为第六透镜L6的像侧面S12的最大有效半口径。
上述的光学成像系统10通过等腰直角棱镜L0，将光路呈九十度偏折，减小了光学成像系统10的厚度，使得装载该光学成像系统10的电子装置满足轻薄化的设计；并且采用大光圈设计，合理分配曲折力，可实现长焦功能，具有较低的光学成像系统10的光学性能敏感度和较佳的成像品质。
在一些实施例中，光学成像系统10满足以下条件式：10.183≤f*IMGH/Y62≤21.095。如此，可平衡较长焦距与小型化，保证较大成像面满足较大收光面积，提升成像整体亮度。然而，当超出上述条件式范围时，或者光学成像系统10的焦距较长，体积大；或者光学成像系统10的焦距较短，体积小，不能保证较大成像面能够满足较大收光面积。
在一些实施例中，光学成像系统10还包括红外滤光片L7，红外滤光片L7具有物侧面S16及像侧面S17。红外滤光片L7设置在第六透镜L6的像侧面S15，以滤除例如可见光等其他波段的光线，而仅让红外光通过，以使光学成像系统10能够在昏暗的环境及其他特殊的应用场景下也能成像。
在一些实施例中，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及第六透镜L6的材质均为塑料，此时，塑料材质的透镜能够减少光学成像系统10的重量并降低生成成本。在一些实施例中，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及第六透镜L6的材质均为玻璃，此时，光学成像系统10能够耐受较高的温度且具有较好的光学性能。在另一些实施例中，也可以仅是第一透镜L1为玻璃材质，而其他透镜为塑料材质，此时，最靠近物侧的第一透镜L1能够较好地耐受物侧的环境温度影响，且由 于其他透镜为塑料材质的关系，从而使光学成像系统10保持较低的生产成本。在其他实施例中，第一透镜L1的材质为玻璃，其他透镜的材质可任意组合。
在一些实施例中，光学成像系统10满足以下关系式：
1≤EPD/Y62≤3；
其中，EPD为光学成像系统10的入瞳直径，Y62为第六透镜L6的像侧面S15的最大有效半口径。
在一些实施例中，光学成像系统10满足以下条件式：1.443≤EPD/Y62≤2.329。如此，可平衡通光量与小型化，提升成像品质。然而，当超出上述条件式范围时，光学成像系统10的通光量和小型化不能够得到有效平衡，成像质量较差。
在一些实施例中，光学成像系统10满足以下条件式：
1≤∑CT/T14≤2；
其中，∑CT为光学成像系统10的所有透镜于光轴上的厚度之和，T14为第一透镜L1、第二透镜L2、第三透镜L3和第四透镜L4于光轴上的厚度之和。
在一些实施例中，光学成像系统10满足以下条件式：1.266≤∑CT/T14≤1.563。如此，通过合理排布透镜空间位置，让光线过渡更为平缓，并且能够矫正光学成像系统10的场曲，平衡色散与长焦特性。然而，当超出上述条件式范围时，光学成像系统10的色散与长焦特性不能够得到有效平衡。
在一些实施例中，光学成像系统10满足以下条件式：
3mm -1≤MVd/f≤6mm -1；
其中，MVd为六片透镜L6的阿贝数的平均值，f为光学成像系统10的有效焦距。
进一步地，在一些实施例中，3.599mm -1≤MVd/f≤5.919mm -1。如此，可平衡色差，高阿贝数和低阿贝数对应不同的折射率，通过不同材料组合，可实现长焦功能，并提高光学成像性能。然而，当超出上述条件式范围时，不利于实现光学成像系统10的长焦特性，光学成像性能较差。
在一些实施例中，光学成像系统10满足以下条件式：
1°/mm≤FOV/f≤6°/mm；
其中，FOV为光学成像系统10的最大视场角，f为光学成像系统10的有效焦距。
进一步地，在一些实施例中，1.782°/mm≤FOV/f≤5.066°/mm。如此，可使视场角控制在一定范围，使有效焦距达到长焦的距离，实现远摄功能。然而，当超出上述条件式范围时，不利于控制视场角，实现远摄功能。
在一些实施例中，光学成像系统10满足以下条件式：
0≤TL/f≤1；
其中，TL为第一透镜L1的物侧面S4至光学成像系统10的成像面S18于光轴上的距离，f为光学成像系统10的有效焦距。
进一步地，在一些实施例中，光学成像系统10满足以下条件式：0.893≤TL/f≤0.943。如此，可平衡小型化与长焦特性。然而，当超出上述条件式范围时，不利于小型化与长焦特性 的平衡。
在一些实施例中，光学成像系统10满足以下条件式：
1≤f/f1≤3；
其中，f为光学成像系统10的有效焦距，f1为第一透镜L1的有效焦距。
进一步地，在一些实施例中，光学成像系统10满足以下条件式：1.334≤f/f1≤2.211。如此，可使第一透镜L1的曲折力在合理的区间内，提高了第一透镜L1成型工艺的良率；同时使第一透镜L1的曲折力在光学成像系统10整体的曲折力中占有合适的配比，有利于光线稳定过渡。然而，当超出上述条件式范围时，不利于提高第一透镜L1成型工艺的良率及光线的稳定过渡。
在一些实施例中，光学成像系统10满足以下条件式：
0≤|SAG32|/CT34≤1；
其中，SAG32为第三透镜L3的像侧面S8在光轴上的交点至第三透镜L3的像侧面S9的最大有效半径位置于光轴方向的位移量，CT34为第三透镜L3的像侧面S9与第四透镜L4的物侧面S10于光轴上的间距。
进一步地，在一些实施例中，光学成像系统10满足以下条件式：0.038≤|SAG32|/CT34≤0.276。如此，通过光学结构的合理布局，可减缓光线进入光学成像系统10后的方向变化，有助于降低杂散光的强度，降低光学成像系统的光学性能敏感度，提高生产第三透镜L3的成品率。然而，当超出上述条件式范围时，不利于减缓光线进入光学成像系统10后的方向变化，生产第三透镜L3的成品率较低。
在一些实施例中，光学成像系统10满足以下条件式：
0≤|SAG41|/CT34≤1；
其中，SAG41为第四透镜L4的物侧面S10在光轴上的交点至第四透镜L4的物侧面S10的最大有效半径位置于光轴方向的位移量，CT34为第三透镜L3的像侧面S9与第四透镜L4的物侧面S10于光轴上的间距。
进一步地，在一些实施例中，光学成像系统10满足以下条件式：0.283≤|SAG41|/CT34≤0.486。如此，通过光学结构的合理布局，可减缓光线进入光学成像系统10后的方向变化，有助于降低鬼像的强度，降低光学成像系统10的光学性能敏感度，提高生产第四透镜L4的成品率。然而，当超出上述条件式范围时，不利于减缓光线进入光学成像系统10后的方向变化，生产第四透镜L4的成品率较低。
在一些实施例中，光学成像系统10满足以下条件式：
0≤MINL5/MAXL5≤1；
其中，MINL5为第五透镜L5在有效区内的最小厚度，MAXL5为第五透镜L5在有效区内最大厚度。
进一步地，在一些实施例中，光学成像系统10满足以下条件式：0.344≤MINL5/MAXL5≤0.778。如此，第五透镜L5的薄厚比在合适的区间内，提高了第五透镜L5的成型工艺良率；同时第五透镜L5的像差会维持在合理地范围内，有利于消除光学成 像系统10整体的像差。然而，当超出上述条件式范围时，不利于提高第五透镜L5的成型工艺良率及消除光学成像系统10整体的像差。
第一实施例
请继续参见图1，本实施例中的光学成像系统10中，从物侧至像侧包括等腰直角棱镜L0、光阑STO、具有正曲折力的第一透镜L1、具有正曲折力的第二透镜L2、具有负曲折力的第三透镜L3、具有负曲折力的第四透镜L4、具有负曲折力的第五透镜L5、具有正曲折力的第六透镜L6及红外滤光片L7。
在本实施例中，第一透镜L1的物侧面S4在近光轴处为凸面，第一透镜L1的像侧面S5在近光轴处为凹面；第二透镜L2的物侧面S6在近光轴处为凸面，第二透镜L2的像侧面S7在近光轴处为凸面；第三透镜L3的物侧面S8在近光轴处为凸面，第三透镜L3的像侧面S9在近光轴处为凹面，第四透镜L4的物侧面S10在近光轴处为凹面，第四透镜L4的像侧面S11在近光轴处为凸面；第五透镜L5的物侧面S12在近光轴处为凹面，第五透镜L5的像侧面S13在近光轴处为凹面；第六透镜L6的物侧面S14在近光轴处为凸面，第六透镜L6的像侧面S15在近光轴处为凸面。
第一透镜L1的物侧面S4在近圆周处为凸面，第一透镜L1的像侧面S5在近圆周处为凹面；第二透镜L2的物侧面S6在近圆周处为凸面，第二透镜L2的像侧面S7在近圆周处为凸面；第三透镜L3的物侧面S8在近圆周处为凸面，第三透镜L3的像侧面S9在近圆周处为凹面，第四透镜L4的物侧面S10在近圆周处为凹面，第四透镜L4的像侧面S11在近圆周处为凸面；第五透镜L5的物侧面S12在近圆周处为凹面，第五透镜L5的像侧面S13在近圆周处为凸面；第六透镜L6的物侧面S14在近圆周处为凹面，第六透镜L6的像侧面S15在近圆周处为凸面。
请参见图2，图2为第一实施例中光学成像系统10的球差(mm)、像散(mm)和畸变图(％)，其中焦距、阿贝数及折射率的参考波长均为587.5618nm。第一实施例中的光学成像系统10满足下面表格的条件。
表格1
Figure PCTCN2020125460-appb-000001
Figure PCTCN2020125460-appb-000002
需要说明的是，f为光学成像系统10的焦距，FNO为光学成像系统10的光圈数，FOV为光学成像系统10的最大视场角。
表格2
Figure PCTCN2020125460-appb-000003
Figure PCTCN2020125460-appb-000004
需要说明的是，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及第六透镜L6均为非球面镜。非球面的面型由以下公式决定：
Figure PCTCN2020125460-appb-000005
其中，Z是非球面上任意一点与表面顶点的纵向距离，r是非球面上任意一点到光轴的距离，c的顶点曲率(曲率半径的倒数)，k是圆锥常数，Ai是非球面第i-th阶的修正系数，表格2给出了可用于实施例一中各球面镜面S4-S15的高次项系数K、A4、A6、A8、A10……。
第二实施例
请参阅图3，本实施例中的光学成像系统10中，从物侧至像侧包括等腰直角棱镜L0、光阑STO、具有正曲折力的第一透镜L1、具有正曲折力的第二透镜L2、具有负曲折力的第三透镜L3、具有负曲折力的第四透镜L4、具有负曲折力的第五透镜L5、具有负曲折力的第六透镜L6及红外滤光片L7。
在本实施例中，第一透镜L1的物侧面S4在近光轴处为凸面，第一透镜L1的像侧面S5在近光轴处为凹面；第二透镜L2的物侧面S6在近光轴处为凸面，第二透镜L2的像侧面S7在近光轴处为凸面；第三透镜L3的物侧面S8在近光轴处为凸面，第三透镜L3的像侧面S9在近光轴处为凹面，第四透镜L4的物侧面S10在近光轴处为凹面，第四透镜L4的像侧面S11在近光轴处为凸面；第五透镜L5的物侧面S12在近光轴处为凸面，第五透镜L5的像侧面S13在近光轴处为凹面；第六透镜L6的物侧面S14在近光轴处为凸面，第六透镜L6的像侧面S15在近光轴处为凹面。
第一透镜L1的物侧面S4在近圆周处为凸面，第一透镜L1的像侧面S5在近圆周处为凹面；第二透镜L2的物侧面S6在近圆周处为凸面，第二透镜L2的像侧面S7在近圆周处为凹面；第三透镜L3的物侧面S8在近圆周处为凸面，第三透镜L3的像侧面S9在近圆周处为凹面，第四透镜L4的物侧面S10在近圆周处为凹面，第四透镜L4的像侧面S11在近圆周处为凸面；第五透镜L5的物侧面S12在近圆周处为凹面，第五透镜L5的像侧面S13在近圆周处为凸面；第六透镜L6的物侧面S14在近圆周处为凹面，第六透镜L6的像侧面S15在近圆周处为凸面。
请参见图4，图4为第二实施例中光学成像系统10的球差(mm)、像散(mm)和畸变图(％)，其中焦距、阿贝数及折射率的参考波长均为587.5618nm。第二实施例中的光学成像系统10满足下面表格的条件。
表格3
Figure PCTCN2020125460-appb-000006
Figure PCTCN2020125460-appb-000007
需要说明的是，f为光学成像系统10的焦距，FNO为光学成像系统10的光圈数，FOV为光学成像系统10的最大视场角。
表格4
Figure PCTCN2020125460-appb-000008
Figure PCTCN2020125460-appb-000009
需要说明的是，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及第六透镜L6均为非球面镜。非球面的面型由以下公式决定：
Figure PCTCN2020125460-appb-000010
其中，Z是非球面上任意一点与表面顶点的纵向距离，r是非球面上任意一点到光轴的距离，c的顶点曲率(曲率半径的倒数)，k是圆锥常数，Ai是非球面第i-th阶的修正系数，表格4给出了可用于实施例二中各球面镜面S4-S15的高次项系数K、A4、A6、A8、A10……。
第三实施例
请参阅图5，本实施例中的光学成像系统10中，从物侧至像侧包括等腰直角棱镜L0、光阑STO、具有正曲折力的第一透镜L1、具有正曲折力的第二透镜L2、具有负曲折力的第三透镜L3、具有负曲折力的第四透镜L4、具有负曲折力的第五透镜L5、具有正曲折力的第六透镜L6及红外滤光片L7。
在本实施例中，第一透镜L1的物侧面S4在近光轴处为凸面，第一透镜L1的像侧面S5在近光轴处为凹面；第二透镜L2的物侧面S6在近光轴处为凸面，第二透镜L2的像侧面S7在近光轴处为凹面；第三透镜L3的物侧面S8在近光轴处为凹面，第三透镜L3的像侧面S9在近光轴处为凸面，第四透镜L4的物侧面S10在近光轴处为凹面，第四透镜L4的像侧面S11在近光轴处为凸面；第五透镜L5的物侧面S12在近光轴处为凹面，第五透镜L5的像侧面S13在近光轴处为凹面；第六透镜L6的物侧面S14在近光轴处为凸面，第六透镜L6的像侧面S15在近光轴处为凸面。
第一透镜L1的物侧面S4在近圆周处为凸面，第一透镜L1的像侧面S5在近圆周处为凸面；第二透镜L2的物侧面S6在近圆周处为凹面，第二透镜L2的像侧面S7在近圆周处为凸面；第三透镜L3的物侧面S8在近圆周处为凸面，第三透镜L3的像侧面S9在近圆周处为凹面，第四透镜L4的物侧面S10在近圆周处为凹面，第四透镜L4的像侧面S11在近圆周处为 凸面；第五透镜L5的物侧面S12在近圆周处为凹面，第五透镜L5的像侧面S13在近圆周处为凸面；第六透镜L6的物侧面S14在近圆周处为凹面，第六透镜L6的像侧面S15在近圆周处为凸面。
请参见图6，图6为第三实施例中光学成像系统10的球差(mm)、像散(mm)和畸变图(％)，其中焦距、阿贝数及折射率的参考波长均为587.5618nm。第三实施例中的光学成像系统10满足下面表格的条件。
表格5
Figure PCTCN2020125460-appb-000011
需要说明的是，f为光学成像系统10的焦距，FNO为光学成像系统10的光圈数，FOV为光学成像系统10的最大视场角。
表格6
Figure PCTCN2020125460-appb-000012
Figure PCTCN2020125460-appb-000013
需要说明的是，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及第六透镜L6均为非球面镜。非球面的面型由以下公式决定：
Figure PCTCN2020125460-appb-000014
其中，Z是非球面上任意一点与表面顶点的纵向距离，r是非球面上任意一点到光轴的距离，c的顶点曲率(曲率半径的倒数)，k是圆锥常数，Ai是非球面第i-th阶的修正系数，表格6给出了可用于实施例三中各球面镜面S4-S15的高次项系数K、A4、A6、A8、A10……。
第四实施例
请参阅图7，本实施例中的光学成像系统10中，从物侧至像侧包括等腰直角棱镜L0、光阑STO、具有正曲折力的第一透镜L1、具有正曲折力的第二透镜L2、具有负曲折力的第三透镜L3、具有正曲折力的第四透镜L4、具有负曲折力的第五透镜L5、具有正曲折力的第六透镜L6及红外滤光片L7。
在本实施例中，第一透镜L1的物侧面S4在近光轴处为凸面，第一透镜L1的像侧面S5 在近光轴处为凹面；第二透镜L2的物侧面S6在近光轴处为凸面，第二透镜L2的像侧面S7在近光轴处为凸面；第三透镜L3的物侧面S8在近光轴处为凸面，第三透镜L3的像侧面S9在近光轴处为凹面，第四透镜L4的物侧面S10在近光轴处为凹面，第四透镜L4的像侧面S11在近光轴处为凸面；第五透镜L5的物侧面S12在近光轴处为凹面，第五透镜L5的像侧面S13在近光轴处为凹面；第六透镜L6的物侧面S14在近光轴处为凹面，第六透镜L6的像侧面S15在近光轴处为凸面。
第一透镜L1的物侧面S4在近圆周处为凸面，第一透镜L1的像侧面S5在近圆周处为凹面；第二透镜L2的物侧面S6在近圆周处为凸面，第二透镜L2的像侧面S7在近圆周处为凹面；第三透镜L3的物侧面S8在近圆周处为凸面，第三透镜L3的像侧面S9在近圆周处为凹面，第四透镜L4的物侧面S10在近圆周处为凹面，第四透镜L4的像侧面S11在近圆周处为凸面；第五透镜L5的物侧面S12在近圆周处为凹面，第五透镜L5的像侧面S13在近圆周处为凸面；第六透镜L6的物侧面S14在近圆周处为凹面，第六透镜L6的像侧面S15在近圆周处为凸面。
请参见图8，图8为第四实施例中光学成像系统10的球差(mm)、像散(mm)和畸变图(％)，其中焦距、阿贝数及折射率的参考波长均为587.5618nm。第四实施例中的光学成像系统10满足下面表格的条件。
表格7
Figure PCTCN2020125460-appb-000015
Figure PCTCN2020125460-appb-000016
需要说明的是，f为光学成像系统10的焦距，FNO为光学成像系统10的光圈数，FOV为光学成像系统10的最大视场角。
表格8
Figure PCTCN2020125460-appb-000017
需要说明的是，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及第六透镜L6均为非球面镜。非球面的面型由以下公式决定：
Figure PCTCN2020125460-appb-000018
其中，Z是非球面上任意一点与表面顶点的纵向距离，r是非球面上任意一点到光轴的距离，c的顶点曲率(曲率半径的倒数)，k是圆锥常数，Ai是非球面第i-th阶的修正系数，表格8给出了可用于实施例四中各球面镜面S4-S15的高次项系数K、A4、A6、A8、A10……。
第五实施例
请参阅图9，本实施例中的光学成像系统10中，从物侧至像侧包括等腰直角棱镜L0、光阑STO、具有正曲折力的第一透镜L1、具有正曲折力的第二透镜L2、具有负曲折力的第三透镜L3、具有正曲折力的第四透镜L4、具有负曲折力的第五透镜L5、具有正曲折力的第六透镜L6及红外滤光片L7。
在本实施例中，第一透镜L1的物侧面S4在近光轴处为凸面，第一透镜L1的像侧面S5在近光轴处为凸面；第二透镜L2的物侧面S6在近光轴处为凹面，第二透镜L2的像侧面S7在近光轴处为凸面；第三透镜L3的物侧面S8在近光轴处为凸面，第三透镜L3的像侧面S9在近光轴处为凹面，第四透镜L4的物侧面S10在近光轴处为凹面，第四透镜L4的像侧面S11在近光轴处为凸面；第五透镜L5的物侧面S12在近光轴处为凹面，第五透镜L5的像侧面S13在近光轴处为凹面；第六透镜L6的物侧面S14在近光轴处为凸面，第六透镜L6的像侧面S15在近光轴处为凸面。
第一透镜L1的物侧面S4在近圆周处为凸面，第一透镜L1的像侧面S5在近圆周处为凹面；第二透镜L2的物侧面S6在近圆周处为凸面，第二透镜L2的像侧面S7在近圆周处为凹面；第三透镜L3的物侧面S8在近圆周处为凸面，第三透镜L3的像侧面S9在近圆周处为凹面，第四透镜L4的物侧面S10在近圆周处为凹面，第四透镜L4的像侧面S11在近圆周处为凸面；第五透镜L5的物侧面S12在近圆周处为凹面，第五透镜L5的像侧面S13在近圆周处为凸面；第六透镜L6的物侧面S14在近圆周处为凹面，第六透镜L6的像侧面S15在近圆周处为凸面。
请参见图10，图10为第五实施例中光学成像系统10的球差(mm)、像散(mm)和畸变图(％)，其中焦距、阿贝数及折射率的参考波长均为587.5618nm。第五实施例中的光学成像系统10满足下面表格的条件。
表格9
Figure PCTCN2020125460-appb-000019
Figure PCTCN2020125460-appb-000020
需要说明的是，f为光学成像系统10的焦距，FNO为光学成像系统10的光圈数，FOV为光学成像系统10的最大视场角。
表格10
Figure PCTCN2020125460-appb-000021
Figure PCTCN2020125460-appb-000022
需要说明的是，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及第六透镜L6均为非球面镜。非球面的面型由以下公式决定：
Figure PCTCN2020125460-appb-000023
其中，Z是非球面上任意一点与表面顶点的纵向距离，r是非球面上任意一点到光轴的距离，c的顶点曲率(曲率半径的倒数)，k是圆锥常数，Ai是非球面第i-th阶的修正系数，表格10给出了可用于实施例五中各球面镜面S4-S15的高次项系数K、A4、A6、A8、A10……。
第六实施例
请参阅图11，本实施例中的光学成像系统10中，从物侧至像侧包括等腰直角棱镜L0、光阑STO、具有正曲折力的第一透镜L1、具有正曲折力的第二透镜L2、具有负曲折力的第三透镜L3、具有正曲折力的第四透镜L4、具有正曲折力的第五透镜L5、具有负曲折力的第六透镜L6及红外滤光片L7。
在本实施例中，第一透镜L1的物侧面S4在近光轴处为凸面，第一透镜L1的像侧面S5在近光轴处为凹面；第二透镜L2的物侧面S6在近光轴处为凸面，第二透镜L2的像侧面S7在近光轴处为凸面；第三透镜L3的物侧面S8在近光轴处为凸面，第三透镜L3的像侧面S9在近光轴处为凹面，第四透镜L4的物侧面S10在近光轴处为凸面，第四透镜L4的像侧面S11在近光轴处为凹面；第五透镜L5的物侧面S12在近光轴处为凹面，第五透镜L5的像侧面S13在近光轴处为凸面；第六透镜L6的物侧面S14在近光轴处为凹面，第六透镜L6的像侧面S15在近光轴处为凸面。
第一透镜L1的物侧面S4在近圆周处为凸面，第一透镜L1的像侧面S5在近圆周处为凹面；第二透镜L2的物侧面S6在近圆周处为凸面，第二透镜L2的像侧面S7在近圆周处为凸面；第三透镜L3的物侧面S8在近圆周处为凸面，第三透镜L3的像侧面S9在近圆周处为凹面，第四透镜L4的物侧面S10在近圆周处为凹面，第四透镜L4的像侧面S11在近圆周处为凸面；第五透镜L5的物侧面S12在近圆周处为凹面，第五透镜L5的像侧面S13在近圆周处为凸面；第六透镜L6的物侧面S14在近圆周处为凹面，第六透镜L6的像侧面S15在近圆周处为凸面。
请参见图12，图12为第六实施例中光学成像系统10的球差(mm)、像散(mm)和畸变图(％)，其中焦距、阿贝数及折射率的参考波长均为587.5618nm。第六实施例中的光学成像系统10满足下面表格的条件。
表格11
Figure PCTCN2020125460-appb-000024
Figure PCTCN2020125460-appb-000025
需要说明的是，f为光学成像系统10的焦距，FNO为光学成像系统10的光圈数，FOV为光学成像系统10的最大视场角。
表格12
Figure PCTCN2020125460-appb-000026
Figure PCTCN2020125460-appb-000027
需要说明的是，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及第六透镜L6均为非球面镜。非球面的面型由以下公式决定：
Figure PCTCN2020125460-appb-000028
其中，Z是非球面上任意一点与表面顶点的纵向距离，r是非球面上任意一点到光轴的距离，c的顶点曲率(曲率半径的倒数)，k是圆锥常数，Ai是非球面第i-th阶的修正系数，表格12给出了可用于实施例六中各球面镜面S4-S15的高次项系数K、A4、A6、A8、A10……。
第七实施例
请参阅图13，本实施例中的光学成像系统10中，从物侧至像侧包括等腰直角棱镜L0、光阑STO、具有正曲折力的第一透镜L1、具有负曲折力的第二透镜L2、具有正曲折力的第三透镜L3、具有负曲折力的第四透镜L4、具有负曲折力的第五透镜L5、具有正曲折力的第六透镜L6及红外滤光片L7。
在本实施例中，第一透镜L1的物侧面S4在近光轴处为凸面，第一透镜L1的像侧面S5在近光轴处为凹面；第二透镜L2的物侧面S6在近光轴处为凸面，第二透镜L2的像侧面S7在近光轴处为凹面；第三透镜L3的物侧面S8在近光轴处为凸面，第三透镜L3的像侧面S9在近光轴处为凹面，第四透镜L4的物侧面S10在近光轴处为凹面，第四透镜L4的像侧面S11在近光轴处为凸面；第五透镜L5的物侧面S12在近光轴处为凹面，第五透镜L5的像侧面S13在近光轴处为凸面；第六透镜L6的物侧面S14在近光轴处为凸面，第六透镜L6的像侧面S15在近光轴处为凹面。
第一透镜L1的物侧面S4在近圆周处为凸面，第一透镜L1的像侧面S5在近圆周处为凹面；第二透镜L2的物侧面S6在近圆周处为凸面，第二透镜L2的像侧面S7在近圆周处为凸面；第三透镜L3的物侧面S8在近圆周处为凸面，第三透镜L3的像侧面S9在近圆周处为凹 面，第四透镜L4的物侧面S10在近圆周处为凹面，第四透镜L4的像侧面S11在近圆周处为凸面；第五透镜L5的物侧面S12在近圆周处为凹面，第五透镜L5的像侧面S13在近圆周处为凸面；第六透镜L6的物侧面S14在近圆周处为凹面，第六透镜L6的像侧面S15在近圆周处为凸面。
请参见图14，图14为第七实施例中光学成像系统10的球差(mm)、像散(mm)和畸变图(％)，其中焦距、阿贝数及折射率的参考波长均为587.5618nm。第七实施例中的光学成像系统10满足下面表格的条件。
表格13
Figure PCTCN2020125460-appb-000029
需要说明的是，f为光学成像系统10的焦距，FNO为光学成像系统10的光圈数，FOV为光学成像系统10的最大视场角。
表格14
Figure PCTCN2020125460-appb-000030
Figure PCTCN2020125460-appb-000031
需要说明的是，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及第六透镜L6均为非球面镜。非球面的面型由以下公式决定：
Figure PCTCN2020125460-appb-000032
其中，Z是非球面上任意一点与表面顶点的纵向距离，r是非球面上任意一点到光轴的距离，c的顶点曲率(曲率半径的倒数)，k是圆锥常数，Ai是非球面第i-th阶的修正系数，表格14给出了可用于实施例七中各球面镜面S4-S15的高次项系数K、A4、A6、A8、A10……。
表格15示出了第一实施例至第七实施例的光学成像系统10中f*IMGH/Y62、EPD/Y62、∑CT/T14、MVd/f、FOV/f、TL/f、f/f1、|SAG32|/CT34、|SAG41|/CT34和MINL5/MAXL5的值。
表格15
  (f*IMGH/Y62) EPD/Y62 ∑CT/T14 MVd/f FOV/f
一 13.193mm 1.939 1.476 4.719mm -1 3.497°/mm
二 12.019mm 1.646 1.56 4.97mm -1 3.245°/mm
三 10.592mm 1.516 1.563 5.615mm -1 4.466°/mm
四 14.009mm 2.152 1.447 3.599mm -1 1.782°/mm
五 10.183mm 1.443 1.461 5.919mm -1 5.066°/mm
六 12.071mm 1.726 1.429 4.582mm -1 3.585°/mm
七 21.095mm 2.329 1.266 3.993mm -1 3.275°/mm
  MINL5/MAXL5 f/f1 |SAG32|/CT34 |SAG41|/CT34 TL/f
一 0.406 1.667 0.152 0.283 0.913
二 0.658 1.652 0.188 0.407 0.939
三 0.406 1.639 0.059 0.486 0.922
四 0.5 1.468 0.1 0.37 0.905
五 0.478 2.211 0.066 0.355 0.928
六 0.344 1.334 0.038 0.313 0.943
七 0.778 1.49 0.276 0.326 0.893
请参见图15，本发明实施例的光学成像系统10可应用于本发明实施例的取像装置100。取像装置100包括感光元件20及上述任一实施例的光学成像系统10。感光元件20设置在光学成像系统10的像侧。
感光元件20可以采用互补金属氧化物半导体(CMOS，ComplementaryMetal Oxide Semiconductor)影像感测器或者电荷耦合元件(CCD，Charge-coupled Device)。
请继续参见图15，本发明实施例的取像装置100可应用于本发明实施例的电子装置1000，电子装置1000包括壳体200及取像装置100，取像装置100安装在壳体200内以获取图像。
本发明实施例的电子装置1000可应用于车载、自动驾驶及监控装置，其中电子装置1000包括但不限于为行车记录仪、智能手机、平板电脑、笔记本电脑、电子书籍阅读器、便携多媒体播放器(PMP)、便携电话机、视频电话机、数码静物相机、移动医疗装置、可穿戴式设备等支持成像的电子装置。
对于本领域技术人员而言，显然本发明不限于上述示范性实施例的细节，而且在不背离本发明的精神或基本特征的情况下，能够以其他的具体形式实现本发明。因此，无论从哪一点来看，均应将实施例看作是示范性的，而且是非限制性的，本发明的范围由所附权利要求而不是上述说明限定，因此旨在将落在权利要求的等同要件的含义和范围内的所有变化涵括在本发明内。
最后应说明的是，以上实施例仅用以说明本发明的技术方案而非限制，尽管参照较佳实施例对本发明进行了详细说明，本领域的普通技术人员应当理解，可以对本发明的技术方案 进行修改或等同替换，而不脱离本发明技术方案的精神和范围。

Claims (12)

  1. 一种光学成像系统，其特征在于，由物侧到像侧沿光轴依次包括：
    棱镜；
    光阑；
    具有正曲折力的第一透镜，所述第一透镜的物侧面在近光轴处为凸面；
    具有曲折力的第二透镜；
    具有曲折力的第三透镜；
    具有曲折力的第四透镜；
    具有曲折力的第五透镜；及
    具有曲折力的第六透镜；
    所述光学成像系统满足以下关系式：
    10mm≤f*IMGH/Y62≤25mm；
    其中，f为所述光学成像系统的有效焦距，IMGH为所述光学成像系统的最大视场角对应像高的一半，Y62为所述第六透镜的像侧面的最大有效半口径。
  2. 如权利要求1所述的光学成像系统，其特征在于，所述光学成像系统满足以下关系式：
    1≤EPD/Y62≤3；
    其中，EPD为所述光学成像系统的入瞳直径，Y62为所述第六透镜的像侧面的最大有效半口径。
  3. 如权利要求1所述的光学成像系统，其特征在于，所述光学成像系统满足以下条件式：
    1≤∑CT/T14≤2；
    其中，∑CT为所述光学成像系统的所有透镜于光轴上的厚度之和，T14为所述第一透镜、所述第二透镜、所述第三透镜和所述第四透镜于光轴上的厚度之和。
  4. 如权利要求1所述的光学成像系统，其特征在于，所述光学成像系统满足以下条件式：
    3mm -1≤MVd/f≤6mm -1；
    其中，MVd为六片透镜的阿贝数的平均值，f为所述光学成像系统的有效焦距。
  5. 如权利要求1所述的光学成像系统，其特征在于，所述光学成像系统满足以下条件式：
    1°/mm≤FOV/f≤6°/mm；
    其中，FOV为所述光学成像系统的最大视场角，f为所述光学成像系统的有效焦距。
  6. 如权利要求1所述的光学成像系统，其特征在于，所述光学成像系统满足以下条件式：
    0≤TL/f≤1；
    其中，TL为所述第一透镜的物侧面至所述光学成像系统的成像面于光轴上的距离，f为所述光学成像系统的有效焦距。
  7. 如权利要求1所述的光学成像系统，其特征在于，所述光学成像系统满足以下条件式：
    1≤f/f1≤3；
    其中，f为所述光学成像系统的有效焦距，f1为所述第一透镜的有效焦距。
  8. 如权利要求1所述的光学成像系统，其特征在于，所述光学成像系统满足以下条件式：
    0≤|SAG32|/CT34≤1；
    其中，SAG32为所述第三透镜的像侧面在光轴上的交点至所述第三透镜的像侧面的最大有效半径位置于光轴方向的位移量，CT34为所述第三透镜的像侧面与所述第四透镜的物侧面于光轴上的间距。
  9. 如权利要求1所述的光学成像系统，其特征在于，所述光学成像系统满足以下条件式：
    0≤|SAG41|/CT34≤1；
    其中，SAG41为所述第四透镜的物侧面在光轴上的交点至所述第四透镜的物侧面的最大有效半径位置于光轴方向的位移量，CT34为所述第三透镜的像侧面与所述第四透镜的物侧面于光轴上的间距。
  10. 如权利要求1所述的光学成像系统，其特征在于，所述光学成像系统满足以下条件式：
    0≤MINL5/MAXL5≤1；
    其中，MINL5为所述第五透镜在有效区内的最小厚度，MAXL5为所述第五透镜在有效区内的最大厚度。
  11. 一种取像装置，其特征在于，包括：
    如权利要求1-10任意一项所述的光学成像系统；及
    感光元件，设置于所述光学成像系统的成像面。
  12. 一种电子装置，其特征在于，包括：
    壳体；及
    如权利要求11所述的取像装置，所述取像装置安装在所述壳体内以获取图像。
PCT/CN2020/125460 2020-10-30 2020-10-30 光学成像系统、取像装置及电子装置 WO2022088087A1 (zh)

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US20170357081A1 (en) * 2015-01-06 2017-12-14 Zhejiang Sunny Optics Co.,Ltd. Camera Lens
CN107765394A (zh) * 2016-08-22 2018-03-06 大立光电股份有限公司 光学摄像系统组、取像装置及电子装置
CN109031589A (zh) * 2017-06-09 2018-12-18 大立光电股份有限公司 光学影像撷取镜组、取像装置及电子装置
CN110187478A (zh) * 2019-07-12 2019-08-30 浙江舜宇光学有限公司 光学成像镜头
CN110187469A (zh) * 2018-02-22 2019-08-30 大立光电股份有限公司 成像光学镜头、取像装置及电子装置
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Publication number Priority date Publication date Assignee Title
US20170357081A1 (en) * 2015-01-06 2017-12-14 Zhejiang Sunny Optics Co.,Ltd. Camera Lens
CN107765394A (zh) * 2016-08-22 2018-03-06 大立光电股份有限公司 光学摄像系统组、取像装置及电子装置
CN109031589A (zh) * 2017-06-09 2018-12-18 大立光电股份有限公司 光学影像撷取镜组、取像装置及电子装置
CN110187469A (zh) * 2018-02-22 2019-08-30 大立光电股份有限公司 成像光学镜头、取像装置及电子装置
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