WO2022126661A1 - 光学成像系统、取像模组及电子装置 - Google Patents

光学成像系统、取像模组及电子装置 Download PDF

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Publication number
WO2022126661A1
WO2022126661A1 PCT/CN2020/137787 CN2020137787W WO2022126661A1 WO 2022126661 A1 WO2022126661 A1 WO 2022126661A1 CN 2020137787 W CN2020137787 W CN 2020137787W WO 2022126661 A1 WO2022126661 A1 WO 2022126661A1
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Prior art keywords
lens
imaging system
optical imaging
object side
optical
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PCT/CN2020/137787
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English (en)
French (fr)
Inventor
谭怡翔
刘秀
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/CN2020/137787 priority Critical patent/WO2022126661A1/zh
Publication of WO2022126661A1 publication Critical patent/WO2022126661A1/zh

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/06—Panoramic objectives; So-called "sky lenses" including panoramic objectives having reflecting surfaces
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration

Definitions

  • the present application relates to the technical field of optical imaging, and in particular, to an optical imaging system, an imaging module and an electronic device.
  • the inventor found that there are at least the following problems in the prior art: it is difficult for the existing periscope optical imaging system to achieve high-definition imaging while maintaining the long focal length of the optical imaging system.
  • An embodiment of the present application provides an optical imaging system, including in order from the object side to the image side:
  • the first lens has a positive refractive power, and the object side surface of the first lens is convex at the near optical axis;
  • the second lens has refractive power
  • the third lens has refractive power
  • a fifth lens with refractive power and the object side surface of the fifth lens is concave near the circumference
  • optical imaging system satisfies the following conditional formula:
  • f is the effective focal length of the optical imaging system
  • ImgH is half of the image height corresponding to the maximum angle of view of the optical imaging system.
  • the above-mentioned optical imaging system increases the focal length of the optical imaging system while satisfying the miniature design. and good image quality; at the same time, the optical imaging system can obtain an equivalent focal length of about 150mm by satisfying the above conditional formula, so it has the characteristics of telephoto and telephoto.
  • An embodiment of the present application also provides an imaging module, including:
  • a photosensitive element, the photosensitive element is arranged on the image side of the optical imaging system.
  • the above-mentioned imaging module includes an optical imaging system.
  • the optical imaging system reasonably configures the refractive power and surface shape of each lens, so that the system can meet the miniature design and at the same time increase the focal length of the optical imaging system, which can be used for long-range shooting. Increase the magnification to achieve higher pixels and good image quality; at the same time, the optical imaging system can obtain an equivalent focal length of about 150mm by satisfying the above conditional formula, so it has the characteristics of telephoto and telephoto.
  • An embodiment of the present application also provides an electronic device, including:
  • the image capturing module is arranged on the casing.
  • the above-mentioned electronic device includes an imaging module, and the imaging module includes an optical imaging system.
  • the optical imaging system reasonably configures the refractive power and surface shape of each lens, so that the system can meet the miniature design and increase the optical imaging system.
  • the focal length can be used for long-range shooting, which can improve the magnification and achieve higher pixels and good image quality; at the same time, the optical imaging system can obtain an equivalent focal length of about 150mm by satisfying the above conditional formula, so it has the characteristics of telephoto and telephoto. .
  • FIG. 1 is a schematic structural diagram of an optical imaging system provided by a first embodiment of the present application.
  • FIG. 2 is a schematic diagram of spherical aberration, astigmatism and distortion of the optical imaging system in the first embodiment of the present application.
  • FIG. 3 is a schematic structural diagram of an optical imaging system provided by a second embodiment of the present application.
  • FIG. 4 is a schematic diagram of spherical aberration, astigmatism and distortion of the optical imaging system in the second embodiment of the present application.
  • FIG. 5 is a schematic structural diagram of an optical imaging system provided by a third embodiment of the present application.
  • FIG. 6 is a schematic diagram of spherical aberration, astigmatism and distortion of the optical imaging system in the third embodiment of the present application.
  • FIG. 7 is a schematic structural diagram of an optical imaging system provided by a fourth embodiment of the present application.
  • FIG. 8 is a schematic diagram of spherical aberration, astigmatism and distortion of the optical imaging system in the fourth embodiment of the present application.
  • FIG. 9 is a schematic structural diagram of an optical imaging system provided by a fifth embodiment of the present application.
  • FIG. 10 is a schematic diagram of spherical aberration, astigmatism and distortion of the optical imaging system in the fifth embodiment of the present application.
  • FIG. 11 is a schematic structural diagram of an imaging module provided by a sixth embodiment of the present application.
  • FIG. 12 is a schematic structural diagram of an electronic device provided by a seventh embodiment of the present application.
  • the first lens L1 The first lens L1
  • the third lens L3 is the third lens L3
  • first and second are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, features defined as “first”, “second” may expressly or implicitly include one or more of said features. In the description of the present application, “plurality” means three or more, unless otherwise expressly and specifically defined.
  • the first embodiment of the present application proposes an optical imaging system 10 , which includes a first lens L1 , a second lens L2 , a third lens L3 , a fourth lens L4 and a fifth lens in sequence from the object side to the image side Lens L5.
  • the first lens L1 has a positive refractive power, the first lens L1 has an object side S1 and an image side S2, and the object side S1 of the first lens L1 is convex at the near optical axis (shown by the dotted line in FIG.
  • the second lens L2 With refractive power, the second lens L2 has an object side S3 and an image side S4; the third lens L3 has refractive power, and the third lens L3 has an object side S5 and an image side S6; the fourth lens L4 has refractive power, and the fourth lens L4 It has an object side S7 and an image side S8; the fifth lens L5 has refractive power, the fifth lens L5 has an object side S9 and an image side S10, and the object side S9 of the fifth lens L5 is concave near the circumference.
  • 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 image height corresponding to the maximum angle of view of the optical imaging system 10 .
  • the above-mentioned optical imaging system 10 can obtain an equivalent focal length of about 150mm, thus having telephoto characteristics, suitable for long-range shooting, and supporting high-pixel shooting.
  • the equivalent focal length of the optical imaging system is less than 147mm, and it cannot be guaranteed that the optical imaging system can meet the telephoto characteristics.
  • the focal length of the optical imaging system 10 is increased while satisfying the miniature design, which can be used for long-range shooting and can improve the magnification. magnification to achieve higher pixels and good image quality.
  • the optical imaging system 10 further has an optical path deflection element 30 on the object side, and the image side of the optical imaging system 10 has an imaging surface S13 .
  • the optical path refraction element 30 can change the propagation direction of light to reduce the space occupied by the optical imaging system 10 when it is installed in the imaging module, and can also make the optical imaging system 10 be used for a periscope lens.
  • the rotating element 30 may be a triangular prism; the imaging surface S13 may be the receiving surface of the photosensitive element 20 .
  • the optical path refraction element 30 may also be a reflector, a pentaprism, a heptagonal prism, or other elements having the function of changing the direction of light propagation.
  • the optical imaging system 10 further includes a stop STO.
  • the diaphragm STO can be arranged on the surface of any one lens, or arranged before the first lens L1, or arranged between any two lenses, or arranged on the image side S10 of the fifth lens L5.
  • the stop STO is provided on the object side surface S1 of the first lens L1.
  • the optical imaging system 10 further includes a filter L6, and the filter L6 has an object side S11 and an image side S12.
  • the filter L6 is arranged on the image side of the fifth lens L5 to filter out light in other wavelength bands such as visible light, and only allow infrared light to pass through, so that the optical imaging system 10 can be used in dark environments and other special application scenarios. Can also image.
  • the filter 16 in the optical imaging system 10 can also be used to filter out invisible light such as infrared light, and only allow visible light to pass through, so as to adapt to what the human eye sees, thereby enabling optical imaging
  • the system 10 can have high pixels and good imaging quality when used in the daytime with sufficient light.
  • the optical imaging system 10 satisfies the following conditional formula:
  • TTL is the distance on the optical axis from the object side surface S1 of the first lens L1 to the imaging surface S13 of the optical imaging system 10 .
  • the optical imaging system 10 can support high-pixel photosensitive elements, that is, ImgH determines the size of the photosensitive element, and the larger the ImgH, the larger the size of the photosensitive element 20 that can be supported; the TTL decreases , the length of the entire optical imaging system 10 can be compressed, so that the optical imaging system 10 is easy to achieve ultra-thinning and miniaturization.
  • the ratio of TTL/ImgH is greater than 6.7, the length of the optical imaging system 10 is long, and it is difficult to ensure the ultra-thinness and miniaturization of the optical imaging system 10; in addition, the value of ImgH may be too small, which is not conducive to supporting large-sized photosensitive elements 20.
  • the optical imaging system 10 satisfies the following conditional formula:
  • TTL is positively correlated with f, and by controlling the ratio of TTL/f within a reasonable range, the optical imaging system 10 can be miniaturized on the premise of obtaining telephoto characteristics.
  • the ratio of TTL/f is greater than 0.96, the total optical length of the optical imaging system 10 is relatively large when the optical imaging system 10 has telephoto characteristics, which is not conducive to the miniaturization of the optical imaging system 10 .
  • the optical imaging system 10 satisfies the following conditional formula:
  • f4 is the focal length of the fourth lens L4.
  • the fourth lens L4 provides a part of the positive or negative refractive power for the optical imaging system 10, which can be used to adjust the overall refractive power of the optical imaging system 10.
  • the fourth lens L4 and the The first lens L1, the second lens L2 and the third lens L3 form a Gaussian-like structure, which can balance the distortion generated by the first lens L1, the second lens L2 and the third lens L3, and avoid high-order aberrations caused by excessive refractive index. Thereby, the imaging quality of the optical imaging system is improved.
  • is less than 3, the effective focal length of the optical imaging system 10 is relatively small, which is not conducive to satisfying the telephoto characteristic.
  • the focal length of the fourth lens L4 is too large, it is difficult to balance the distortion generated by the first lens L1, the second lens L2 and the third lens L3, and the refractive index of the optical imaging system 10 is too high. large, it is easy to cause high-order aberrations.
  • the optical imaging system 10 satisfies the following conditional formula:
  • f2 is the focal length of the second lens L2
  • R22 is the radius of curvature of the image side surface S4 of the second lens L2 at the optical axis.
  • By reasonably controlling the ratio of
  • is greater than 142, the focal length of the second lens L2 is too large, or the radius of curvature of the image side S4 of the second lens L2 at the optical axis is too small, and it is difficult to ensure that the above-mentioned situation can effectively improve the light transmission rate.
  • the aberration generated by the first lens L1 affects the imaging resolution of the optical imaging system 10 .
  • the optical imaging system 10 satisfies the following conditional formula:
  • FNO is the aperture number of the optical imaging system 10 .
  • the optical imaging system 10 satisfies the following conditional formula:
  • ⁇ CT is the sum of the thicknesses of the lenses of the optical imaging system 10 on the optical axis
  • ⁇ AT is the sum of the air intervals of the adjacent lenses of the optical imaging system 10 on the optical axis.
  • the imaging quality of the optical imaging system 10 can be improved, and the light can be smoothly transitioned on each lens surface during the transmission process.
  • the ratio of ⁇ CT/ ⁇ AT is greater than 4.16, the thickness of the lens is too large, which is not conducive to the convergence and diffusion of light between the lenses, forcing the lens to change the light trend in a more curved posture, increasing the manufacturing difficulty of each lens;
  • the ratio of ⁇ CT/ ⁇ AT is less than 2.12, the thickness of the lens is too low to effectively control the trend of light, thereby reducing the imaging quality of the optical imaging system 10 .
  • the optical imaging system 10 satisfies the following conditional formula:
  • BF/TTL >0.6, preferably 0.6 ⁇ BF/TTL ⁇ 0.8;
  • BF is the minimum distance from the image side S10 of the fifth lens L5 to the imaging surface S13 of the optical imaging system in the direction parallel to the optical axis
  • TTL is the distance between the object side S1 of the first lens L1 and the imaging surface S13 of the optical imaging system. distance on the optical axis.
  • the back focus of the optical imaging system 10 can be made more reasonable, which is beneficial to the assembly of the optical imaging system 10 in the imaging module.
  • the ratio of BF/TTL is less than 0.6, the back focus of the optical imaging system 10 is too small, resulting in insufficient space for installing the optical imaging system 10, which is not conducive to the assembly of the optical imaging system 10 in the imaging module.
  • the optical imaging system 10 in this embodiment includes an optical path refraction element 30 , a diaphragm STO, a first lens L1 with positive refractive power, and a second lens with negative refractive power from the object side to the image side.
  • Lens L2 third lens L3 with positive refractive power
  • fourth lens L4 with negative refractive power
  • fifth lens L5 with negative refractive power
  • filter L6 filter L6
  • the first lens L1 , the second lens L2 , the third lens L3 , the fourth lens L4 and the fifth lens L5 are all made of plastic, and the filter L6 is made of glass.
  • the materials of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4 and the fifth lens L5 may also be glass, or the first lens L1, the One or more of the second lens L2, the third lens L3, the fourth lens L4 and the fifth lens L5 are glass, and the rest are plastic.
  • the object side S1 of the first lens L1 is convex at the near optical axis
  • the image side S2 of the first lens L1 is convex at the near optical axis
  • the object side S3 of the second lens L2 is concave at the near optical axis
  • the second lens L2 is concave at the near optical axis.
  • the image side S4 of the lens L2 is concave at the near optical axis
  • the object side S5 of the third lens L3 is convex at the near optical axis
  • the image side S6 of the third lens L3 is convex at the near optical axis
  • the fourth lens L4 The object side S7 is concave at the near optical axis
  • the image side S8 of the fourth lens L4 is convex at the near optical axis
  • the object side S9 of the fifth lens L5 is concave at the near optical axis
  • the object side S9 of the fifth lens L5 is concave at the near optical axis.
  • the side surface S10 is convex at the near optical axis.
  • the object side S1 of the first lens L1 is convex near the circumference
  • the image side S2 of the first lens L1 is convex near the circumference
  • the object side S3 of the second lens L2 is convex near the circumference
  • the object side S3 of the second lens L2 is convex near the circumference
  • the image side S4 is concave near the circumference
  • the object side S5 of the third lens L3 is convex near the circumference
  • the image side S6 of the third lens L3 is convex near the circumference
  • the object side S7 of the fourth lens L4 is near the circumference.
  • the circumference is concave
  • the image side S8 of the fourth lens L4 is concave at the near circumference
  • the object side S9 of the fifth lens L5 is concave at the near circumference
  • the image side S10 of the fifth lens L5 is convex at the near circumference.
  • the light emitted or reflected by the subject enters the optical imaging system 10 from the object side direction, and passes through the optical path refraction element 30, the diaphragm STO, the first lens L1, and the second lens in sequence L2 , the third lens L3 , the fourth lens L4 , the fifth lens L5 and the filter L6 finally converge on the imaging surface S13 .
  • Table 1 shows a table of characteristics of the optical imaging system 10 of the present embodiment, wherein the reference wavelength of the focal length, refractive index and Abbe number are all 587.5618 nm, and the units of Y radius, thickness and focal length are all millimeters (mm) .
  • f is the effective 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
  • TTL is the distance from the object side S1 of the first lens L1 to the optical imaging system 10. The distance of the imaging plane S13 on the optical axis.
  • the first lens L1 , the second lens L2 , the third lens L3 , the fourth lens L4 and the fifth lens L5 are all aspherical, and the surface Z of each spherical lens can be used but not limited to the following aspherical formula To limit:
  • Z is the distance between any point on the aspheric surface and the vertex of the surface parallel to the optical axis
  • r is the perpendicular distance from any point on the aspheric surface to the optical axis
  • c is the vertex curvature (the reciprocal of the radius of curvature)
  • k is the conic constant
  • Ai is the correction coefficient of the i-th order of the aspheric surface
  • Table 2 shows the high-order coefficients K, A4, A6, A8, A10, A12, A14, A16, A18 and A20.
  • FIG. 2 shows the longitudinal spherical aberration curve, astigmatism curve and distortion curve of the optical imaging system 10 of the first embodiment, wherein the longitudinal spherical aberration curve represents that light with wavelengths of 656.2725 nm, 587.5618 nm and 486.1327 nm respectively passes through the optical imaging system After each lens of 10, the deviation of the focus point is less than 0.025mm, indicating that the imaging quality of this embodiment is good; the reference wavelength of astigmatism and distortion is 587.5618nm, and the astigmatism curve represents the curvature of the meridional image plane and the sagittal image plane.
  • the optical imaging system 10 provided in the first embodiment can achieve good imaging quality.
  • the optical imaging system 10 in this embodiment from the object side to the image side, it includes an optical path refraction element 30 , a diaphragm STO, a first lens L1 with positive refractive power, and a second lens with negative refractive power Lens L2, third lens L3 with positive refractive power, fourth lens L4 with negative refractive power, fifth lens L5 with positive refractive power, and filter L6.
  • the object side S1 of the first lens L1 is convex at the near optical axis
  • the image side S2 of the first lens L1 is convex at the near optical axis
  • the object side S3 of the second lens L2 is concave at the near optical axis
  • the second lens L2 is concave at the near optical axis.
  • the image side S4 of the lens L2 is concave at the near optical axis
  • the object side S5 of the third lens L3 is convex at the near optical axis
  • the image side S6 of the third lens L3 is convex at the near optical axis
  • the fourth lens L4 The object side S7 of the fourth lens L4 is concave at the near optical axis
  • the image side S8 of the fourth lens L4 is concave at the near optical axis
  • the object side S9 of the fifth lens L5 is convex at the near optical axis
  • the object side S9 of the fifth lens L5 is convex at the near optical axis.
  • the side surface S10 is concave at the near optical axis.
  • the object side S1 of the first lens L1 is convex at the near circumference
  • the image side S2 of the first lens L1 is convex at the near circumference
  • the object side S3 of the second lens L2 is concave at the near circumference
  • the second lens L2 has a concave surface.
  • the image side S4 is concave near the circumference
  • the object side S5 of the third lens L3 is convex near the circumference
  • the image side S6 of the third lens L3 is convex near the circumference
  • the object side S7 of the fourth lens L4 is near the circumference.
  • the circumference is concave
  • the image side S8 of the fourth lens L4 is convex at the near circumference
  • the object side S9 of the fifth lens L5 is concave at the near circumference
  • the image side S10 of the fifth lens L5 is concave at the near circumference.
  • the light emitted or reflected by the subject enters the optical imaging system 10 from the object side direction, and passes through the optical path refraction element 30, the diaphragm STO, the first lens L1, and the second lens in sequence L2 , the third lens L3 , the fourth lens L4 , the fifth lens L5 and the filter L6 finally converge on the imaging surface S13 .
  • Table 3 is a table showing the characteristics of the optical imaging system 10 of the present embodiment, wherein the reference wavelength of the focal length, refractive index and Abbe number are all 587.5618 nm, and the units of Y radius, thickness and focal length are all millimeters (mm) .
  • Table 4 shows higher order coefficients K, A4, A6, A8, A10, A12, A14, A16, A18, and A20 that can be used for each of the spherical lenses S1-S10 in the second embodiment.
  • FIG. 4 shows longitudinal spherical aberration curves, astigmatism curves and distortion curves of the optical imaging system 10 of the second embodiment, wherein the longitudinal spherical aberration curves represent that light with wavelengths of 656.2725 nm, 587.5618 nm and 486.1327 nm respectively pass through the optical imaging system After each lens of 10, the deviation of the focus point is less than 0.05mm, indicating that the imaging quality of this embodiment is good; the reference wavelength of astigmatism and distortion is 587.5618nm, and the astigmatism curve represents the curvature of the meridional image plane and the sagittal image plane.
  • the optical imaging system 10 in this embodiment from the object side to the image side, it includes an optical path refraction element 30 , a diaphragm STO, a first lens L1 with positive refractive power, and a second lens with negative refractive power Lens L2, third lens L3 with negative refractive power, fourth lens L4 with positive refractive power, fifth lens L5 with negative refractive power, and filter L6.
  • the object side S1 of the first lens L1 is convex at the near optical axis
  • the image side S2 of the first lens L1 is convex at the near optical axis
  • the object side S3 of the second lens L2 is concave at the near optical axis
  • the second lens L2 is concave at the near optical axis.
  • the image side S4 of the lens L2 is concave at the near optical axis
  • the object side S5 of the third lens L3 is convex at the near optical axis
  • the image side S6 of the third lens L3 is concave at the near optical axis
  • the fourth lens L4 The object side S7 is convex at the near optical axis
  • the image side S8 of the fourth lens L4 is convex at the near optical axis
  • the object side S9 of the fifth lens L5 is convex at the near optical axis
  • the object side S9 of the fifth lens L5 is convex at the near optical axis.
  • the side surface S10 is concave at the near optical axis.
  • the object side S1 of the first lens L1 is convex at the near circumference
  • the image side S2 of the first lens L1 is convex at the near circumference
  • the object side S3 of the second lens L2 is concave at the near circumference
  • the second lens L2 has a concave surface.
  • the image side S4 is concave at the near circumference
  • the object side S5 of the third lens L3 is convex at the near circumference
  • the image side S6 of the third lens L3 is concave at the near circumference
  • the object side S7 of the fourth lens L4 is near the circumference.
  • the circumference is convex
  • the image side S8 of the fourth lens L4 is concave at the near circumference
  • the object side S9 of the fifth lens L5 is concave at the near circumference
  • the image side S10 of the fifth lens L5 is convex at the near circumference.
  • the light emitted or reflected by the object enters the optical imaging system from the object side direction, and passes through the optical path refraction element 30, the aperture STO, the first lens L1, and the second lens L2 in sequence , the third lens L3, the fourth lens L4, the fifth lens L5 and the filter L6, and finally converge on the imaging surface S13.
  • Table 5 is a table showing the characteristics of the optical imaging system 10 of the present embodiment, wherein the reference wavelength of the focal length, refractive index and Abbe number are all 587.5618 nm, and the units of Y radius, thickness and focal length are all millimeters (mm) .
  • Table 6 shows higher order coefficients K, A4, A6, A8, A10, A12, A14, A16, A18, and A20 that can be used for each of the spherical lenses S1-S10 in the third embodiment.
  • FIG. 6 shows longitudinal spherical aberration curves, astigmatism curves and distortion curves of the optical imaging system 10 of the third embodiment, wherein the longitudinal spherical aberration curves indicate that light with wavelengths of 656.2725 nm, 587.5618 nm and 486.1327 nm respectively passes through the optical imaging system After 10 lenses, the deviation of the focus point is less than 0.025mm, indicating that the imaging quality of this embodiment is good; the reference wavelength of astigmatism and distortion is 587.5618nm, and the astigmatism curve represents the curvature of the meridional image plane and the sagittal image plane.
  • the optical imaging system 10 provided in the third embodiment can achieve good imaging quality.
  • the optical imaging system 10 in this embodiment from the object side to the image side, it includes an optical path refraction element 30, a diaphragm STO, a first lens L1 with positive refractive power, and a second lens with positive refractive power.
  • Lens L2 third lens L3 with negative refractive power
  • fourth lens L4 with positive refractive power
  • fifth lens L5 with positive refractive power
  • filter L6 filter L6
  • the object side S1 of the first lens L1 is convex at the near optical axis
  • the image side S2 of the first lens L1 is concave at the near optical axis
  • the object side S3 of the second lens L2 is convex at the near optical axis
  • the second lens L2 is convex at the near optical axis.
  • the image side S4 of the lens L2 is concave at the near optical axis
  • the object side S5 of the third lens L3 is convex at the near optical axis
  • the image side S6 of the third lens L3 is concave at the near optical axis
  • the fourth lens L4 The object side S7 of the fourth lens L4 is convex at the near optical axis
  • the image side S8 of the fourth lens L4 is concave at the near optical axis
  • the object side S9 of the fifth lens L5 is convex at the near optical axis
  • the object side S9 of the fifth lens L5 is convex at the near optical axis.
  • the side surface S10 is concave at the near optical axis.
  • the object side S1 of the first lens L1 is convex at the near circumference
  • the image side S2 of the first lens L1 is concave at the near circumference
  • the object side S3 of the second lens L2 is convex at the near circumference
  • the second lens L2 is convex at the near circumference.
  • the image side S4 is convex at the near circumference
  • the object side S5 of the third lens L3 is concave at the near circumference
  • the image side S6 of the third lens L3 is concave at the near circumference
  • the object side S7 of the fourth lens L4 is near the circumference.
  • the circumference is convex
  • the image side S8 of the fourth lens L4 is concave at the near circumference
  • the object side S9 of the fifth lens L5 is concave at the near circumference
  • the image side S10 of the fifth lens L5 is concave at the near circumference.
  • the light emitted or reflected by the subject enters the optical imaging system 10 from the object side direction, and passes through the optical path refraction element 30, the diaphragm STO, the first lens L1, and the second lens in sequence L2 , the third lens L3 , the fourth lens L4 , the fifth lens L5 and the filter L6 finally converge on the imaging surface S13 .
  • Table 7 is a table showing the characteristics of the optical imaging system 10 of the present embodiment, wherein the reference wavelength of the focal length, refractive index and Abbe number are all 587.5618 nm, and the units of Y radius, thickness and focal length are all millimeters (mm) .
  • Table 8 shows higher order coefficients K, A4, A6, A8, A10, A12, A14, A16, A18, and A20 that can be used for each of the spherical lenses S1-S10 in the fourth embodiment.
  • FIG. 8 shows longitudinal spherical aberration curves, astigmatism curves and distortion curves of the optical imaging system 10 of the fourth embodiment, wherein the longitudinal spherical aberration curves represent that light with wavelengths of 656.2725 nm, 587.5618 nm and 486.1327 nm respectively passes through the optical imaging system After each lens of 10, the deviation of the focus point is less than 0.025mm, indicating that the imaging quality of this embodiment is good; the reference wavelength of astigmatism and distortion is 587.5618nm, and the astigmatism curve represents the curvature of the meridional image plane and the sagittal image plane.
  • the optical imaging system 10 in this embodiment from the object side to the image side, it includes an optical path refraction element 30 , a diaphragm STO, a first lens L1 with positive refractive power, and a second lens with positive refractive power Lens L2, third lens L3 with negative refractive power, fourth lens L4 with positive refractive power, fifth lens L5 with negative refractive power, and filter L6.
  • the object side S1 of the first lens L1 is convex at the near optical axis
  • the image side S2 of the first lens L1 is concave at the near optical axis
  • the object side S3 of the second lens L2 is convex at the near optical axis
  • the second lens L2 is convex at the near optical axis.
  • the image side S4 of the lens L2 is convex at the near optical axis
  • the object side S5 of the third lens L3 is concave at the near optical axis
  • the image side S6 of the third lens L3 is concave at the near optical axis
  • the fourth lens L4 The object side S7 of the fourth lens L4 is convex at the near optical axis
  • the image side S8 of the fourth lens L4 is concave at the near optical axis
  • the object side S9 of the fifth lens L5 is convex at the near optical axis
  • the object side S9 of the fifth lens L5 is convex at the near optical axis.
  • the side surface S10 is concave at the near optical axis.
  • the object side S1 of the first lens L1 is convex at the near circumference
  • the image side S2 of the first lens L1 is concave at the near circumference
  • the object side S3 of the second lens L2 is convex at the near circumference
  • the second lens L2 is convex at the near circumference.
  • the image side S4 is convex at the near circumference
  • the object side S5 of the third lens L3 is concave at the near circumference
  • the image side S6 of the third lens L3 is concave at the near circumference
  • the object side S7 of the fourth lens L4 is near the circumference.
  • the circumference is convex
  • the image side S8 of the fourth lens L4 is concave at the near circumference
  • the object side S9 of the fifth lens L5 is concave at the near circumference
  • the image side S10 of the fifth lens L5 is concave at the near circumference.
  • the light emitted or reflected by the subject enters the optical imaging system 10 from the object side direction, and passes through the optical path refraction element 30, the diaphragm STO, the first lens L1, and the second lens in sequence L2 , the third lens L3 , the fourth lens L4 , the fifth lens L5 and the filter L6 finally converge on the imaging surface S13 .
  • Table 9 is a table showing the characteristics of the optical imaging system 10 of the present embodiment, wherein the reference wavelength of the focal length, refractive index and Abbe number are all 587.5618 nm, and the units of Y radius, thickness and focal length are all millimeters (mm) .
  • Table 10 shows higher order coefficients K, A4, A6, A8, A10, A12, A14, A16, A18, and A20 that can be used for each of the spherical lenses S1-S10 in the fifth embodiment.
  • FIG. 10 shows longitudinal spherical aberration curves, astigmatism curves and distortion curves of the optical imaging system 10 of the fifth embodiment, wherein the longitudinal spherical aberration curves indicate that light with wavelengths of 656.2725 nm, 587.5618 nm and 486.1327 nm respectively passes through the optical imaging system After each lens of 10, the deviation of the focus point is less than 0.025mm, indicating that the imaging quality of this embodiment is good; the reference wavelength of astigmatism and distortion is 587.5618nm, and the astigmatism curve represents the curvature of the meridional image plane and the sagittal image plane.
  • the optical imaging system 10 provided in the fifth embodiment can achieve good imaging quality.
  • Table 11 shows 43*f/(2*ImgH), TTL/ImgH, TTL/f,
  • the sixth embodiment of the present application provides an imaging module 100, including an optical imaging system 10 and a photosensitive element 20, and the photosensitive element 20 is arranged 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 optical imaging system 10 in the imaging module 100 of the present embodiment reasonably configures each lens, so that the system can meet the miniature design and at the same time increase the focal length of the optical imaging system 10, which can be used for long-range shooting and can improve the magnification. , to achieve higher pixels and good image quality; at the same time, the optical imaging system 10 can obtain an equivalent focal length of about 150MM by satisfying various conditional expressions, thereby having a telephoto characteristic.
  • a seventh embodiment of the present application provides an electronic device 1000 , which includes a casing 200 and an imaging module 100 , and the imaging module 100 is disposed in the casing 200 .
  • the electronic device 1000 of this embodiment includes, but is not limited to, a smart phone, a tablet computer, a notebook computer, an electronic book reader, a portable multimedia player (PMP), a portable phone, a video phone, a digital still camera, a mobile medical device, a portable An electronic device 1000 supporting imaging such as a wearable device.
  • a smart phone a tablet computer, a notebook computer, an electronic book reader, a portable multimedia player (PMP), a portable phone, a video phone, a digital still camera, a mobile medical device, a portable An electronic device 1000 supporting imaging such as a wearable device.
  • PMP portable multimedia player
  • the optical imaging system 10 in the electronic device 1000 of the present embodiment can reasonably configure each lens, so that the system can satisfy the miniature design, and at the same time, the focal length of the optical imaging system 10 can be increased, which can be used for long-range shooting, and the magnification can be improved. High pixels and good image quality; at the same time, the optical imaging system 10 can obtain an equivalent focal length of about 150MM by satisfying various conditional expressions, thus having the characteristics of telephoto and telephoto.

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Abstract

本申请公开了一种光学成像系统、取像模组及电子装置。所述光学成像系统由物侧至像侧依次包括：第一透镜，具有正屈折力，所述第一透镜的物侧面在近光轴处为凸面；第二透镜，具有屈折力；第三透镜，具有屈折力；第四透镜，具有屈折力；及第五透镜，具有屈折力，所述第五透镜的物侧面在近圆周处为凹面；所述光学成像系统满足以下条件式：43*f/(2*ImgH)>147；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所对应的像高的一半。上述光学成像系统在满足微型设计的同时，增大了光学成像系统的焦距，可用于远景拍摄；同时，光学成像系统通过满足上述条件式，可获得150mm左右的等效焦距，从而具有长焦摄远特性。

Description

光学成像系统、取像模组及电子装置 技术领域
本申请涉及光学成像技术领域，具体涉及一种光学成像系统、取像模组及电子装置。
背景技术
随着手机、平板电脑、无人机、计算机等电子产品在生活中的广泛应用，各种电子产品不断地推陈出新。其中，电子产品中潜望式摄像镜头拍摄效果的改进创新成为人们关注的重心之一，同时也成为科技改进的一项重要内容。
在实现本申请的过程中，发明人发现现有技术中至少存在如下问题：现有的潜望式光学成像系统难以在保持光学成像系统的长焦距的同时实现高清成像。
发明内容
鉴于以上内容，有必要提出一种光学成像系统、取像模组及电子装置，以解决上述问题。
本申请的一实施例提供一种光学成像系统，由物侧至像侧依次包括：
第一透镜，具有正屈折力，所述第一透镜的物侧面在近光轴处为凸面；
第二透镜，具有屈折力；
第三透镜，具有屈折力；
第四透镜，具有屈折力；及
第五透镜，具有屈折力，所述第五透镜的物侧面在近圆周处为凹面；
所述光学成像系统满足以下条件式：
43*f/(2*ImgH)>147；
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所对应的像高的一半。
上述光学成像系统通过合理地配置各透镜的屈折力和面型，使系统在满足微型设计的同时，增大了光学成像系统的焦距，可用于远景拍摄，能够提升放大倍率，实现较高的像素和良好的像质；同时，光学成像系统通过满足上述条件式，可获得150mm左右的等效焦距，从而具有长焦摄远特性。
本申请的一实施例还提供了一种取像模组，包括：
如上所述的光学成像系统；及
感光元件，所述感光元件设于所述光学成像系统的像侧。
上述取像模组包括光学成像系统，光学成像系统通过合理地配置各透镜的屈折力和面型，使系统在满足微型设计的同时，增大了光学成像系统的焦距，可用于远景拍摄，能够提升放大倍率，实现较高的像素和良好的像质；同时，光学成像系统通过满足上述条件式，可获得150mm左右的等效焦距，从而具有长焦摄远特性。
本申请的一实施例还提供了一种电子装置，包括：
壳体；及
如上所述的取像模组，所述取像模组设于所述壳体。
上述电子装置包括取像模组，取像模组包括光学成像系统，光学成像系统通过合理地配置各透镜的屈折力和面型，使系统在满足微型设计的同时，增大了光学成像系统的焦距，可用于远景拍摄，能够提升放大倍率，实现较高的像素和良好的像质；同时，光学成像系统通过满足上述条件式，可获得150mm左右的等效焦距，从而具有长焦摄远特性。
附图说明
图1是本申请第一实施例提供的光学成像系统的结构示意图。
图2是本申请第一实施例中光学成像系统的球差、像散和畸变示意图。
图3是本申请第二实施例提供的光学成像系统的结构示意图。
图4是本申请第二实施例中光学成像系统的球差、像散和畸变示意图。
图5是本申请第三实施例提供的光学成像系统的结构示意图。
图6是本申请第三实施例中光学成像系统的球差、像散和畸变示意图。
图7是本申请第四实施例提供的光学成像系统的结构示意图。
图8是本申请第四实施例中光学成像系统的球差、像散和畸变示意图。
图9是本申请第五实施例提供的光学成像系统的结构示意图。
图10是本申请第五实施例中光学成像系统的球差、像散和畸变示意图。
图11是本申请第六实施例提供的取像模组的结构示意图。
图12是本申请第七实施例提供的电子装置的结构示意图。
主要元件符号说明
电子装置                            1000
取像模组                            100
光学成像系统                        10
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
滤光片                              L6
光阑                                STO
物侧面                              S1、S3、S5、S7、S9、S11
像侧面                              S2、S4、S6、S8、S10、S12
成像面                              S13
感光元件                            20
光路折转元件                        30
壳体                                200
具体实施方式
下面详细描述本申请的实施方式，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，仅用于解释本申请，而不能理解为对本申请的限制。
在本申请的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”、“顺时针”、“逆时针”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。
此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个所述特征。在本申请的描述中，“多个”的含义是三个或三个以上，除非另有明确具体的限定。
下文的公开提供了许多不同的实施方式或例子用来实现本申请的不同结构。为了简化本申请的公开，下文中对特定例子的部件和设置进行描述。当然，它们仅仅为示例，并且目的不在于限制本申请。此外，本申请可以在不同例子中重复参考数字和/或参考字母，这种重复是为了简化和清楚的目的，其本身不指示所讨论各种实施方式和/或设置之间的关系。此外，本申请提供了的各种特定的工艺和材料的例子，但是本领域普通技术人员可以意识到其他工艺的应用和/或其他材料的使用。
请参见图1，本申请第一实施例提出了一种光学成像系统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。
第一透镜L1具有正屈折力，第一透镜L1具有物侧面S1及像侧面S2，第一透镜L1的物侧面S1在近光轴(图1中虚线所示)处为凸面；第二透镜L2具有屈折力，第二透镜L2具有物侧面S3及像侧面S4；第三透镜L3具有屈折力，第三透镜L3具有物侧面S5及像侧面S6；第四透镜L4具有屈折力，第四透镜L4具有物侧面S7及像侧面S8；第五透镜L5具有屈折力，第五透镜L5具有物侧面S9及像侧面S10，第五透镜L5的物侧面S9在近圆周处为凹面。
光学成像系统10满足以下条件式：
43*f/(2*ImgH)>147；
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的最大视场角所对应的像高的一半。
上述光学成像系统10通过合理地控制43*f/(2*ImgH)的值，可获得150mm左右的等效焦距，从而具有长焦摄远特性，适合远景拍摄，并支持高像素拍摄。当43*f/(2*ImgH)的值小于147时，光学成像系统的等效焦距小于147mm，无法保证光学成像系统能够满足长焦摄远特性。
本实施例的光学成像系统10中，通过合理地配置各透镜的屈折力和面型，使系统在满足微型设计的同时，增大了光学成像系统10的焦距，可用于远景拍摄，能够提升放大倍率，实现较高的像素和良好的像质。
本实施例中，光学成像系统10的物侧还有一光路折转元件30，光学成像系统10的像侧还有一成像面S13。其中，光路折转元件30可以改变光线的传播方向，用于缩小光学成像系 统10被安装于取像模组时所占的空间，还可使光学成像系统10用于潜望式镜头，光路折转元件30可以为三棱镜；成像面S13可以为感光元件20的接收面。
可以理解地，在其他的实施例中，光路折转元件30还可以为反射镜、五棱镜、七棱镜或其他具有改变光线传播方向的功能的元件。
在一些实施例中，光学成像系统10还包括光阑STO。光阑STO可以设置在任意一个透镜的表面上，或设置在第一透镜L1之前，或设置在任意两个透镜之间，或设置在第五透镜L5的像侧面S10。例如，在图1中，光阑STO设置在第一透镜L1的物侧面S1上。
在一些实施例中，光学成像系统10还包括滤光片L6，滤光片L6具有物侧面S11及像侧面S12。滤光片L6设置在第五透镜L5的像侧，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。
可以理解地，在其他的实施例中，光学成像系统10中的滤光片16也可以用于滤除红外光等不可见光，而仅让可见光通过，以适应人眼视物，从而使光学成像系统10能够在光线充足的白天使用时，具有较高的像素和良好的成像品质。
在一些实施例中，光学成像系统10满足以下条件式：
TTL/ImgH<6.7；
其中，TTL为第一透镜L1的物侧面S1至光学成像系统10的成像面S13在光轴上的距离。
通过合理地控制TTL/ImgH的比值，可使光学成像系统10支持高像素的感光元件，即ImgH决定了感光元件的大小，ImgH越大，可支持的感光元件20的尺寸越大；TTL减小，可使整个光学成像系统10的长度压缩，使光学成像系统10易于实现超薄化及小型化。当TTL/ImgH的比值大于6.7时，光学成像系统10的长度较长，难以保证光学成像系统10的超薄化及小型化；另外，ImgH的值可能偏小，不利于支持大尺寸的感光元件20。
在一些实施例中，光学成像系统10满足以下条件式：
TTL/f≤0.96。
TTL与f正相关，通过将TTL/f的比值控制在合理的范围内，可使光学成像系统10在获得长焦摄远特性的前提下实现小型化。当TTL/f的比值大于0.96时，光学成像系统10在具有长焦摄远特性的情况下光学总长偏大，不利于光学成像系统10实现小型化。
在一些实施例中，光学成像系统10满足以下条件式：
3≤|f/f4|≤6；
其中，f4为第四透镜L4的焦距。
通过合理地控制|f/f4|的比值，第四透镜L4为光学成像系统10提供一部分的正屈折力或负屈折力，可用于调配光学成像系统10的整体屈折力，第四透镜L4与第一透镜L1、第二透镜L2及第三透镜L3形成类高斯结构，可平衡第一透镜L1、第二透镜L2及第三透镜L3产生的畸变，避免折射率过大而造成高阶像差，从而提高光学成像系统的成像品质。当|f/f4|的比值小于3时，光学成像系统10的有效焦距偏小，不利于满足长焦摄远特性。当|f/f4|的比值大于6时，第四透镜L4的焦距偏大，难以平衡第一透镜L1、第二透镜L2及第三透镜L3所产生的畸变，光学成像系统10的折射率过大，容易造成高阶像差。
在一些实施例中，光学成像系统10满足以下条件式：
|f2/R22|<142；
其中，f2为第二透镜L2的焦距，R22为第二透镜L2的像侧面S4在光轴处的曲率半径。
通过合理地控制|f2/R22|的比值，可以有效改善光线经第一透镜L1所产生的像差，提升光学成像系统10的成像解析力。当|f2/R22|的比值大于142时，第二透镜L2的焦距偏大，或第二透镜L2的像侧面S4在光轴处的曲率半径偏小，上述情况均难以保证可以有效改善光线经第一透镜L1所产生的像差，从而影响光学成像系统10的成像解析力。
在一些实施例中，光学成像系统10满足以下条件式：
11mm<FNO*ImgH<13mm；
其中，FNO为光学成像系统10的光圈数。
通过合理地控制FNO*ImgH的值，能够在超长焦距的系统参数下获得较为平缓的光线走势，可保持光学成像系统10的入射光瞳与成像面S13的口径大小一致，满足潜望式镜头各透镜口径接近的基本特性。当FNO*ImgH的值小于11mm时，ImgH的值偏小，不利于光学成像系统10支持大尺寸的感光元件20，不利于成像。当FNO*ImgH的值大于13mm时，FNO的光圈数偏大，难以保持光学成像系统10的入射光瞳与成像面S13的口径大小一致，从而难以保证光学成像系统10满足各透镜口径接近的基本特性。
在一些实施例中，光学成像系统10满足以下条件式：
2.12≤ΣCT/ΣAT≤4.16；
其中，ΣCT为光学成像系统10各透镜在光轴上的厚度之和，ΣAT为光学成像系统10相邻透镜在光轴上的空气间隔之和。
通过合理地控制ΣCT/ΣAT的比值，有利于提升光学成像系统10的成像质量，且能够使光线在传递的过程中在各个透镜面上平滑过渡。当ΣCT/ΣAT的比值大于4.16时，则透镜的厚度过大，不利于光线在各透镜之间的汇聚与扩散，迫使透镜以更加弯曲的姿态改变光线走势，增加了各透镜的制造难度；当ΣCT/ΣAT的比值小于2.12时，则透镜的厚度过低，无法有效地控制光线的走势，从而使光学成像系统10的成像质量下降。
在一些实施例中，光学成像系统10满足以下条件式：
BF/TTL>0.6，优选0.6<BF/TTL<0.8；
其中，BF为第五透镜L5的像侧面S10至光学成像系统的成像面S13在平行于光轴方向上的最小距离，TTL为第一透镜L1的物侧面S1至光学成像系统的成像面S13在光轴上的距离。
通过合理地控制BF/TTL的比值，可使光学成像系统10的后焦更加合理，有利于光学成像系统10在取像模组中的组装。当BF/TTL的比值小于0.6时，光学成像系统10的后焦过小，导致用于安装光学成像系统10的空间不足，不利于光学成像系统10在取像模组中的组装。
第一实施例
请参见图1，本实施例中的光学成像系统10中，由物侧至像侧包括光路折转元件30、光阑STO、具有正屈折力的第一透镜L1、具有负屈折力的第二透镜L2、具有正屈折力的第三透镜L3、具有负屈折力的第四透镜L4、具有负屈折力的第五透镜L5及滤光片L6。
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的材质均为塑料，滤光片L6的材质为玻璃。
可以理解地，在其他的实施例中，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的材质也可以均为玻璃，或者第一透镜L1、第二透镜L2、第三透镜L3、第四透镜L4及第五透镜L5中的一者或多者为玻璃，其余为塑料。
第一透镜L1的物侧面S1在近光轴处为凸面，第一透镜L1的像侧面S2在近光轴处为凸 面，第二透镜L2的物侧面S3在近光轴处为凹面，第二透镜L2的像侧面S4在近光轴处为凹面，第三透镜L3的物侧面S5在近光轴处为凸面，第三透镜L3的像侧面S6在近光轴处为凸面，第四透镜L4的物侧面S7在近光轴处为凹面，第四透镜L4的像侧面S8在近光轴处为凸面，第五透镜L5的物侧面S9在近光轴处为凹面，第五透镜L5的物侧面S10在近光轴处为凸面。
第一透镜L1的物侧面S1在近圆周处为凸面，第一透镜L1的像侧面S2在近圆周处为凸面，第二透镜L2的物侧面S3在近圆周处为凸面，第二透镜L2的像侧面S4在近圆周处为凹面，第三透镜L3的物侧面S5在近圆周处为凸面，第三透镜L3的像侧面S6在近圆周处为凸面，第四透镜L4的物侧面S7在近圆周处为凹面，第四透镜L4的像侧面S8在近圆周处为凹面，第五透镜L5的物侧面S9在近圆周处为凹面，第五透镜L5的像侧面S10在近圆周处为凸面。
当光学成像系统10用于成像时，被摄物发出或反射的光线从物侧方向进入光学成像系统10，并依次穿过光路折转元件30、光阑STO、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及滤光片L6，最终汇聚到成像面S13上。
表格1示出了本实施例的光学成像系统10的特性的表格，其中，焦距、折射率和阿贝数的参考波长均为587.5618nm，Y半径、厚度和焦距的单位均为毫米(mm)。
表格1
Figure PCTCN2020137787-appb-000001
其中，f为光学成像系统10的有效焦距，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，TTL为第一透镜L1的物侧面S1至光学成像系统10的成像面S13在光轴上的距离。
本实施例中，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均为非球面，各球面透镜的面型Z可利用但不限于以下非球面公式进行限定：
Figure PCTCN2020137787-appb-000002
其中，Z是非球面上任意一点与表面顶点之间平行于光轴的距离，r是非球面上任意一点到光轴的垂直距离，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示出了可用于第一实施例中各球面镜片S1-S10的高次项系数K、A4、A6、A8、A10、A12、A14、A16、A18及A20。
表格2
Figure PCTCN2020137787-appb-000003
图2示出了第一实施例的光学成像系统10的纵向球差曲线、像散曲线和畸变曲线，其中纵向球差曲线表示波长分别为656.2725nm、587.5618nm及486.1327nm的光线经由光学成像系统10的各透镜后，会聚焦点偏离的数值均小于0.025mm，说明本实施例的成像质量较好；像散和畸变的参考波长为587.5618nm，像散曲线表示子午像面弯曲和弧矢像面弯曲，其中弧矢场曲和子午场曲的最大值均小于0.025mm，像散和场曲得到了较好的补偿；畸变曲线表示不同视场角对应的畸变大小值，其中最大畸变小于50％，畸变也得到了较好的校正。根据图2可知，第一实施例所给出的光学成像系统10能够实现良好的成像品质。
第二实施例
请参见图3，本实施例中的光学成像系统10中，由物侧至像侧包括光路折转元件30、光阑STO、具有正屈折力的第一透镜L1、具有负屈折力的第二透镜L2、具有正屈折力的第三透镜L3、具有负屈折力的第四透镜L4、具有正屈折力的第五透镜L5及滤光片L6。
第一透镜L1的物侧面S1在近光轴处为凸面，第一透镜L1的像侧面S2在近光轴处为凸面，第二透镜L2的物侧面S3在近光轴处为凹面，第二透镜L2的像侧面S4在近光轴处为凹 面，第三透镜L3的物侧面S5在近光轴处为凸面，第三透镜L3的像侧面S6在近光轴处为凸面，第四透镜L4的物侧面S7在近光轴处为凹面，第四透镜L4的像侧面S8在近光轴处为凹面，第五透镜L5的物侧面S9在近光轴处为凸面，第五透镜L5的物侧面S10在近光轴处为凹面。
第一透镜L1的物侧面S1在近圆周处为凸面，第一透镜L1的像侧面S2在近圆周处为凸面，第二透镜L2的物侧面S3在近圆周处为凹面，第二透镜L2的像侧面S4在近圆周处为凹面，第三透镜L3的物侧面S5在近圆周处为凸面，第三透镜L3的像侧面S6在近圆周处为凸面，第四透镜L4的物侧面S7在近圆周处为凹面，第四透镜L4的像侧面S8在近圆周处为凸面，第五透镜L5的物侧面S9在近圆周处为凹面，第五透镜L5的像侧面S10在近圆周处为凹面。
当光学成像系统10用于成像时，被摄物发出或反射的光线从物侧方向进入光学成像系统10，并依次穿过光路折转元件30、光阑STO、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及滤光片L6，最终汇聚到成像面S13上。
表格3示出了本实施例的光学成像系统10的特性的表格，其中，焦距、折射率和阿贝数的参考波长均为587.5618nm，Y半径、厚度和焦距的单位均为毫米(mm)。
表格3
Figure PCTCN2020137787-appb-000004
表格4示出了可用于第二实施例中各球面镜片S1-S10的高次项系数K、A4、A6、A8、A10、A12、A14、A16、A18及A20。
表格4
Figure PCTCN2020137787-appb-000005
Figure PCTCN2020137787-appb-000006
图4示出了第二实施例的光学成像系统10的纵向球差曲线、像散曲线和畸变曲线，其中纵向球差曲线表示波长分别为656.2725nm、587.5618nm及486.1327nm的光线经由光学成像系统10的各透镜后，会聚焦点偏离的数值均小于0.05mm，说明本实施例的成像质量较好；像散和畸变的参考波长为587.5618nm，像散曲线表示子午像面弯曲和弧矢像面弯曲，其中弧矢场曲和子午场曲的最大值均小于0.025mm，像散和场曲得到了较好的补偿；畸变曲线表示不同视场角对应的畸变大小值，其中最大畸变小于50％，畸变也得到了较好的校正。根据图4可知，第二实施例所给出的光学成像系统10能够实现良好的成像品质。
第三实施例
请参见图5，本实施例中的光学成像系统10中，由物侧至像侧包括光路折转元件30、光阑STO、具有正屈折力的第一透镜L1、具有负屈折力的第二透镜L2、具有负屈折力的第三透镜L3、具有正屈折力的第四透镜L4、具有负屈折力的第五透镜L5及滤光片L6。
第一透镜L1的物侧面S1在近光轴处为凸面，第一透镜L1的像侧面S2在近光轴处为凸面，第二透镜L2的物侧面S3在近光轴处为凹面，第二透镜L2的像侧面S4在近光轴处为凹面，第三透镜L3的物侧面S5在近光轴处为凸面，第三透镜L3的像侧面S6在近光轴处为凹面，第四透镜L4的物侧面S7在近光轴处为凸面，第四透镜L4的像侧面S8在近光轴处为凸面，第五透镜L5的物侧面S9在近光轴处为凸面，第五透镜L5的物侧面S10在近光轴处为凹面。
第一透镜L1的物侧面S1在近圆周处为凸面，第一透镜L1的像侧面S2在近圆周处为凸面，第二透镜L2的物侧面S3在近圆周处为凹面，第二透镜L2的像侧面S4在近圆周处为凹面，第三透镜L3的物侧面S5在近圆周处为凸面，第三透镜L3的像侧面S6在近圆周处为凹面，第四透镜L4的物侧面S7在近圆周处为凸面，第四透镜L4的像侧面S8在近圆周处为凹面，第五透镜L5的物侧面S9在近圆周处为凹面，第五透镜L5的像侧面S10在近圆周处为凸面。
当光学成像系统10用于成像时，被摄物发出或反射的光线从物侧方向进入光学成像系 统，并依次穿过光路折转元件30、光阑STO、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及滤光片L6，最终汇聚到成像面S13上。
表格5示出了本实施例的光学成像系统10的特性的表格，其中，焦距、折射率和阿贝数的参考波长均为587.5618nm，Y半径、厚度和焦距的单位均为毫米(mm)。
表格5
Figure PCTCN2020137787-appb-000007
表格6示出了可用于第三实施例中各球面镜片S1-S10的高次项系数K、A4、A6、A8、A10、A12、A14、A16、A18及A20。
表格6
Figure PCTCN2020137787-appb-000008
Figure PCTCN2020137787-appb-000009
图6示出了第三实施例的光学成像系统10的纵向球差曲线、像散曲线和畸变曲线，其中纵向球差曲线表示波长分别为656.2725nm、587.5618nm及486.1327nm的光线经由光学成像系统10的各透镜后，会聚焦点偏离的数值均小于0.025mm，说明本实施例的成像质量较好；像散和畸变的参考波长为587.5618nm，像散曲线表示子午像面弯曲和弧矢像面弯曲，其中弧矢场曲和子午场曲的最大值均小于0.025mm，像散和场曲得到了较好的补偿；畸变曲线表示不同视场角对应的畸变大小值，其中最大畸变小于50％，畸变也得到了较好的校正。根据图6可知，第三实施例所给出的光学成像系统10能够实现良好的成像品质。
第四实施例
请参见图7，本实施例中的光学成像系统10中，由物侧至像侧包括光路折转元件30、光阑STO、具有正屈折力的第一透镜L1、具有正屈折力的第二透镜L2、具有负屈折力的第三透镜L3、具有正屈折力的第四透镜L4、具有正屈折力的第五透镜L5及滤光片L6。
第一透镜L1的物侧面S1在近光轴处为凸面，第一透镜L1的像侧面S2在近光轴处为凹面，第二透镜L2的物侧面S3在近光轴处为凸面，第二透镜L2的像侧面S4在近光轴处为凹面，第三透镜L3的物侧面S5在近光轴处为凸面，第三透镜L3的像侧面S6在近光轴处为凹面，第四透镜L4的物侧面S7在近光轴处为凸面，第四透镜L4的像侧面S8在近光轴处为凹面，第五透镜L5的物侧面S9在近光轴处为凸面，第五透镜L5的物侧面S10在近光轴处为凹面。
第一透镜L1的物侧面S1在近圆周处为凸面，第一透镜L1的像侧面S2在近圆周处为凹面，第二透镜L2的物侧面S3在近圆周处为凸面，第二透镜L2的像侧面S4在近圆周处为凸面，第三透镜L3的物侧面S5在近圆周处为凹面，第三透镜L3的像侧面S6在近圆周处为凹面，第四透镜L4的物侧面S7在近圆周处为凸面，第四透镜L4的像侧面S8在近圆周处为凹面，第五透镜L5的物侧面S9在近圆周处为凹面，第五透镜L5的像侧面S10在近圆周处为凹面。
当光学成像系统10用于成像时，被摄物发出或反射的光线从物侧方向进入光学成像系统10，并依次穿过光路折转元件30、光阑STO、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及滤光片L6，最终汇聚到成像面S13上。
表格7示出了本实施例的光学成像系统10的特性的表格，其中，焦距、折射率和阿贝数的参考波长均为587.5618nm，Y半径、厚度和焦距的单位均为毫米(mm)。
表格7
Figure PCTCN2020137787-appb-000010
Figure PCTCN2020137787-appb-000011
表格8示出了可用于第四实施例中各球面镜片S1-S10的高次项系数K、A4、A6、A8、A10、A12、A14、A16、A18及A20。
表格8
Figure PCTCN2020137787-appb-000012
图8示出了第四实施例的光学成像系统10的纵向球差曲线、像散曲线和畸变曲线，其中纵向球差曲线表示波长分别为656.2725nm、587.5618nm及486.1327nm的光线经由光学成像系统10的各透镜后，会聚焦点偏离的数值均小于0.025mm，说明本实施例的成像质量较好；像散和畸变的参考波长为587.5618nm，像散曲线表示子午像面弯曲和弧矢像面弯曲，其中弧矢场曲和子午场曲的最大值均小于0.025mm，像散和场曲得到了较好的补偿；畸变曲线表示不同视场角对应的畸变大小值，其中最大畸变小于50％，畸变也得到了较好的校正。根据图 8可知，第四实施例所给出的光学成像系统10能够实现良好的成像品质。
第五实施例
请参见图9，本实施例中的光学成像系统10中，由物侧至像侧包括光路折转元件30、光阑STO、具有正屈折力的第一透镜L1、具有正屈折力的第二透镜L2、具有负屈折力的第三透镜L3、具有正屈折力的第四透镜L4、具有负屈折力的第五透镜L5及滤光片L6。
第一透镜L1的物侧面S1在近光轴处为凸面，第一透镜L1的像侧面S2在近光轴处为凹面，第二透镜L2的物侧面S3在近光轴处为凸面，第二透镜L2的像侧面S4在近光轴处为凸面，第三透镜L3的物侧面S5在近光轴处为凹面，第三透镜L3的像侧面S6在近光轴处为凹面，第四透镜L4的物侧面S7在近光轴处为凸面，第四透镜L4的像侧面S8在近光轴处为凹面，第五透镜L5的物侧面S9在近光轴处为凸面，第五透镜L5的物侧面S10在近光轴处为凹面。
第一透镜L1的物侧面S1在近圆周处为凸面，第一透镜L1的像侧面S2在近圆周处为凹面，第二透镜L2的物侧面S3在近圆周处为凸面，第二透镜L2的像侧面S4在近圆周处为凸面，第三透镜L3的物侧面S5在近圆周处为凹面，第三透镜L3的像侧面S6在近圆周处为凹面，第四透镜L4的物侧面S7在近圆周处为凸面，第四透镜L4的像侧面S8在近圆周处为凹面，第五透镜L5的物侧面S9在近圆周处为凹面，第五透镜L5的像侧面S10在近圆周处为凹面。
当光学成像系统10用于成像时，被摄物发出或反射的光线从物侧方向进入光学成像系统10，并依次穿过光路折转元件30、光阑STO、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及滤光片L6，最终汇聚到成像面S13上。
表格9示出了本实施例的光学成像系统10的特性的表格，其中，焦距、折射率和阿贝数的参考波长均为587.5618nm，Y半径、厚度和焦距的单位均为毫米(mm)。
表格9
Figure PCTCN2020137787-appb-000013
表格10示出了可用于第五实施例中各球面镜片S1-S10的高次项系数K、A4、A6、A8、 A10、A12、A14、A16、A18及A20。
表格10
Figure PCTCN2020137787-appb-000014
图10示出了第五实施例的光学成像系统10的纵向球差曲线、像散曲线和畸变曲线，其中纵向球差曲线表示波长分别为656.2725nm、587.5618nm及486.1327nm的光线经由光学成像系统10的各透镜后，会聚焦点偏离的数值均小于0.025mm，说明本实施例的成像质量较好；像散和畸变的参考波长为587.5618nm，像散曲线表示子午像面弯曲和弧矢像面弯曲，其中弧矢场曲和子午场曲的最大值均小于0.025mm，像散和场曲得到了较好的补偿；畸变曲线表示不同视场角对应的畸变大小值，其中最大畸变小于50％，畸变也得到了较好的校正。根据图10可知，第五实施例所给出的光学成像系统10能够实现良好的成像品质。
表格11示出了第一实施例至第五实施例的光学成像系统10中43*f/(2*ImgH)，TTL/ImgH，TTL/f，|f/f4|，|f2/R21|，FNO*ImgH(mm)，ΣCT/ΣAT和BF/TTL的值。
表格11
实施例 第一实施例 第二实施例 第三实施例 第四实施例 第五实施例
43*f/(2*ImgH) 148.12 148.71 147.53 148.12 152.86
TTL/ImgH 6.56 6.50 6.50 6.61 6.61
TTL/f 0.95 0.94 0.95 0.96 0.93
|f/f4| 3.45 3.65 3.66 4.84 5.27
|f2/R21| 6.73 25.20 8.44 141.40 5.44
FNO*ImgH(mm) 12.52 12.34 12.34 12.34 12.16
ΣCT/ΣAT 4.16 2.93 3.63 2.40 2.12
BF/TTL 0.62 0.63 0.63 0.71 0.64
请参见图11，本申请的第六实施例提供一种取像模组100，包括光学成像系统10及感光 元件20，感光元件20设于光学成像系统10的像侧。
具体地，感光元件20可以采用互补金属氧化物半导体(CMOS，Complementary Metal Oxide Semiconductor)影像感测器或者电荷耦合元件(CCD，Charge-coupled Device)。
本实施例的取像模组100中的光学成像系统10通过合理地配置各透镜，使系统在满足微型设计的同时，增大了光学成像系统10的焦距，可用于远景拍摄，能够提升放大倍率，实现较高的像素和良好的像质；同时，光学成像系统10通过满足各条件式，可获得150MM左右的等效焦距，从而具有长焦摄远特性。
请参见图12，本申请第七实施例提供一种电子装置1000，包括壳体200和取像模组100，取像模组100设于壳体200。
本实施例的电子装置1000包括但不限于智能手机、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1000。
本实施例的电子装置1000中的光学成像系统10通过合理地配置各透镜，使系统在满足微型设计的同时，增大了光学成像系统10的焦距，可用于远景拍摄，能够提升放大倍率，实现较高的像素和良好的像质；同时，光学成像系统10通过满足各条件式，可获得150MM左右的等效焦距，从而具有长焦摄远特性。
对于本领域技术人员而言，显然本申请不限于上述示范性实施例的细节，而且在不背离本申请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申请。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，本申请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申请内。
最后应说明的是，以上实施例仅用以说明本申请的技术方案而非限制，尽管参照较佳实施例对本申请进行了详细说明，本领域的普通技术人员应当理解，可以对本申请的技术方案进行修改或等同替换，而不脱离本申请技术方案的精神和范围。

Claims (11)

  1. 一种光学成像系统，其特征在于，由物侧至像侧依次包括：
    第一透镜，具有正屈折力，所述第一透镜的物侧面在近光轴处为凸面；
    第二透镜，具有屈折力；
    第三透镜，具有屈折力；
    第四透镜，具有屈折力；及
    第五透镜，具有屈折力，所述第五透镜的物侧面在近圆周处为凹面；
    所述光学成像系统满足以下条件式：
    43*f/(2*ImgH)>147；
    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所对应的像高的一半。
  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条件式：
    TTL/ImgH<6.7；
    其中，TTL为所述第一透镜的物侧面至所述光学成像系统的成像面在光轴上的距离。
  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：
    TTL/f≤0.96；
    其中，TTL为所述第一透镜的物侧面至所述光学成像系统的成像面在光轴上的距离。
  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：
    3≤|f/f4|≤6；
    其中，f4为所述第四透镜的焦距。
  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：
    |f2/R22|<142；
    其中，f2为所述第二透镜的焦距，R22为所述第二透镜的像侧面在光轴处的曲率半径。
  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：
    11mm<FNO*ImgH<13mm；
    其中，FNO为所述光学成像系统的光圈数。
  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：
    2.12≤ΣCT/ΣAT≤4.16；
    其中，ΣCT为所述光学成像系统各透镜在光轴上的厚度之和，ΣAT为所述光学成像系统相邻透镜在光轴上的空气间隔之和。
  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：
    BF/TTL>0.6；
    其中，BF为所述第五透镜的像侧面至所述光学成像系统的成像面在平行于光轴方向上的最小距离，TTL为所述第一透镜的物侧面至所述光学成像系统的成像面在光轴上的距离。
  9. 如权利要求1至8中任意一项所述的光学成像系统，其特征在于，所述光学成像系统还包括：
    光路折转元件，设于所述第一透镜的物侧，用于改变光线的传播方向。
  10. 一种取像模组，其特征在于，包括：
    如权利要求1至9中任意一项所述的光学成像系统；及
    感光元件，所述感光元件设于所述光学成像系统的像侧。
  11. 一种电子装置，其特征在于，包括：
    壳体；及
    如权利要求10所述的取像模组，所述取像模组设于所述壳体。
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