WO2021196224A1 - 光学系统、镜头模组及终端设备 - Google Patents

光学系统、镜头模组及终端设备 Download PDF

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Publication number
WO2021196224A1
WO2021196224A1 PCT/CN2020/083348 CN2020083348W WO2021196224A1 WO 2021196224 A1 WO2021196224 A1 WO 2021196224A1 CN 2020083348 W CN2020083348 W CN 2020083348W WO 2021196224 A1 WO2021196224 A1 WO 2021196224A1
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Prior art keywords
lens
optical system
optical axis
object side
optical
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PCT/CN2020/083348
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English (en)
French (fr)
Inventor
张文燕
李明
杨健
邹海荣
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江西晶超光学有限公司
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Application filed by 江西晶超光学有限公司 filed Critical 江西晶超光学有限公司
Priority to PCT/CN2020/083348 priority Critical patent/WO2021196224A1/zh
Priority to US17/470,606 priority patent/US20210405331A1/en
Publication of WO2021196224A1 publication Critical patent/WO2021196224A1/zh

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B9/00—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or -
    • G02B9/60—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having five components only
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
    • G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
    • G02B13/0045—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having five or more lenses

Definitions

  • This application belongs to the field of optical imaging technology, and in particular relates to an optical system, a lens module and a terminal device.
  • the camera lens needs to have a long focal length, but the problem of field curvature is prone to occur and the overall image quality is difficult to guarantee, resulting in poor long-range photography.
  • the embodiments of the present application provide an optical system, a lens module, and a terminal device.
  • the optical system solves the problem of poor imaging quality in long-range shooting and can realize high-definition long-range shooting.
  • an embodiment of the present application provides an optical system, which includes a first lens in sequence from the object side to the image side, with positive refractive power, and the object side surface of the first lens is convex at the optical axis; the second lens , Has refractive power; the third lens has refractive power, the object side of the third lens is concave at the optical axis; the fourth lens has positive refractive power, the image side of the fourth lens is at the optical axis Convex; the fifth lens has refractive power, the object side of the fifth lens is concave at the optical axis, and the image side of the fifth lens is convex at the optical axis; the optical system satisfies the following conditional formula: 0.25 ⁇ ftgtl3/ftltl3 ⁇ 0.8; ftgtl3 is the shortest distance from the object side of the third lens to the image side of the third lens in a direction parallel to the optical axis, and ftltl3 is the
  • This application rationally configures the refractive power of the first lens to the fifth lens and the surface shapes of the first lens, the third lens, the fourth lens and the fifth lens in the optical system, so that the optical system has the characteristics of long focal length and has good performance.
  • the imaging quality can achieve high-definition distant shooting.
  • setting 0.25 ⁇ ftgtl3/ftltl3 ⁇ 0.8 can effectively balance the optical path difference of the optical system, realize the function of correcting the field curvature, and avoid the distortion around the image, making the imaging effect closer For the subject itself, and make the shot picture with high image quality, high resolution and high definition.
  • the optical system satisfies the conditional formula: 7mm ⁇ FNO*L1SD/tanFOV ⁇ 15mm;
  • FNO is the aperture number of the optical system
  • L1SD is the aperture of the first lens
  • tanFOV is the optical system The tangent of the maximum angle of view.
  • the aperture number of the optical system and the aperture of the first lens determine the amount of light entering the entire optical system, and the field angle of the optical system determines the imaging field of view range of the optical system.
  • FNO*L1SD/tanFOV both It can make the optical system have enough light and have a suitable field of view range.
  • FNO*L1SD/tanFOV ⁇ 15mm it will cause too much light entering the optical system, resulting in a decrease in optical performance. If FNO*L1SD/tanFOV ⁇ 7mm, will cause the brightness of the imaging surface to decrease, resulting in a decrease in imaging quality.
  • the optical system satisfies the conditional formula: 0.5 ⁇ L1SD/Imgh ⁇ 0.8; L1SD is the aperture of the first lens, and Imgh is the diagonal length of the effective pixel area of the optical system on the imaging surface half.
  • the aperture of the first lens of the optical system determines the amount of light passing through the entire optical system, and the size of the photosensitive surface determines the image clarity and pixel size of the entire optical system.
  • a reasonable configuration of the L1SD/Imgh range can ensure sufficient light passing to ensure image capture. The clarity. If L1SD/Imgh>0.8, it will cause excessive exposure and high brightness, which will affect the picture quality. If L1SD/Imgh ⁇ 0.5, it will cause insufficient light transmission, insufficient light relative brightness, and reduced picture clarity.
  • the optical system satisfies the conditional formula: 1 ⁇ EFL/f1 ⁇ 3; EFL is the effective focal length of the optical system, and f1 is the focal length of the first lens.
  • EFL is the effective focal length of the optical system
  • f1 is the focal length of the first lens.
  • the reasonable configuration of the focal length of the first lens and the effective focal length of the optical system is beneficial to optimize the imaging performance of the optical system and reduce the sensitivity of the system. If EFL/f1 ⁇ 1, the sensitivity of the system will increase, the processing technology will be difficult, and the aberration correction caused by the first lens will be difficult to meet the shooting needs. If EFL/f1>3, the focal length of the first lens The effective focal length configuration of the optical system is inappropriate, and the aberration generated by the first lens cannot be corrected.
  • the optical system satisfies the conditional formula: 0.05 ⁇ airL2/TTL ⁇ 0.35; airL2 is the distance from the image side surface of the second lens to the object side surface of the third lens on the optical axis, and TTL is The distance from the object side surface of the first lens to the imaging surface of the optical system on the optical axis.
  • airL2/TTL it is helpful to reduce the assembly sensitivity of the optical system and improve the assembly yield. If airL2/TTL>0.35, it will cause the system to be too long and fail to meet the miniaturization design requirements. If airL2/TTL ⁇ 0.05, it will increase the sensitivity of the optical system and cause the production yield to decrease.
  • the optical system satisfies the conditional formula: -1 ⁇ (
  • R9 is the object side surface of the fifth lens
  • the radius of curvature at the optical axis, R10 is the radius of curvature of the image side surface of the fifth lens at the optical axis.
  • the optical system further includes a diaphragm, and the optical system satisfies the conditional formula: 0.3 ⁇ DL/TTL ⁇ 0.6; DL is the aperture of the diaphragm of the optical system, and TTL is the first The distance from the object side of a lens to the imaging surface of the optical system on the optical axis.
  • DL/TTL the appropriate range of DL/TTL, it is conducive to the miniaturization of the optical system and provides enough light for shooting to achieve high-quality, high-definition shooting effects.
  • DL/TTL>0.6 it will cause the light aperture to be too large , The edge light enters the optical system and reduces the image quality.
  • DL/TTL ⁇ 0.3 the aperture of the aperture will be too small, which cannot meet the light flux required by the optical system, and cannot achieve the requirements of high-definition shooting in the long-range.
  • the optical system satisfies the conditional formula: FNO/TTL ⁇ 0.5mm -1 ;
  • FNO is the aperture number of the optical system, and TTL is the imaging from the object side of the first lens to the optical system The distance of the face on the optical axis.
  • FNO/TTL the miniaturization of the optical system can be achieved, and sufficient light flux can be provided for long-range shooting to meet the requirements of high-quality and high-definition shooting. If FNO/TTL>0.5mm -1 , it will cause The lack of light through the optical system reduces the sharpness of the captured image.
  • the optical system satisfies the conditional formula: 0.8 ⁇ TTL/EFL ⁇ 1; TTL is the distance from the object side of the first lens to the imaging surface of the optical system on the optical axis, and EFL is the The effective focal length of the optical system is described.
  • TTL/EFL the focal length of the optical system and the total length of the optical system can be reasonably controlled, which can not only realize the miniaturization of the optical system, but also ensure that the light is better concentrated on the imaging surface.
  • TTL/EFL ⁇ 0.8 the total length of the optical system is too short, which will increase the sensitivity of the system, and is not conducive to the convergence of light on the imaging surface.
  • TTL/EFL ⁇ 1 the total length of the optical system will be too long, which will cause the incident to the imaging surface.
  • the chief ray angle is too large, and the edge ray cannot be incident on the photosensitive surface, resulting in incomplete imaging information.
  • the optical system satisfies the conditional formula: 1.5 ⁇ EFL/Imgh ⁇ 2; EFL is the effective focal length of the optical system, and Imgh is the diagonal length of the effective pixel area of the optical system on the imaging surface half.
  • EFL is the effective focal length of the optical system
  • Imgh is the diagonal length of the effective pixel area of the optical system on the imaging surface half.
  • the present application provides a lens module including a photosensitive element and the optical system described in any one of the foregoing embodiments, and the photosensitive element is located on the image side of the optical system.
  • the present application provides a terminal device including the aforementioned lens module.
  • This application rationally configures the refractive power of the first lens to the fifth lens and the surface shapes of the first lens, the third lens, the fourth lens and the fifth lens in the optical system, so that the optical system has the characteristics of long focal length and has good performance.
  • the imaging quality can achieve high-definition distant shooting.
  • setting 0.25 ⁇ ftgtl3/ftltl3 ⁇ 0.8 can effectively balance the optical path difference of the optical system, realize the function of correcting the field curvature, and avoid the distortion around the image, making the imaging effect closer For the subject itself, and make the shot picture with high image quality, high resolution and high definition.
  • Fig. 1 is a schematic diagram of the optical system provided by the present application applied to a terminal device
  • FIG. 2 is a schematic diagram of the structure of the optical system provided by the first embodiment of the present application.
  • 3 is a longitudinal spherical aberration curve, astigmatism curve and distortion curve of the optical system of the first embodiment
  • FIG. 4 is a schematic structural diagram of an optical system provided by a second embodiment of the present application.
  • FIG. 6 is a schematic structural diagram of an optical system provided by a third embodiment of the present application.
  • FIG. 8 is a schematic structural diagram of an optical system provided by a fourth embodiment of the present application.
  • FIG. 10 is a schematic structural diagram of an optical system provided by a fifth embodiment of the present application.
  • FIG. 12 is a schematic structural diagram of an optical system provided by a sixth embodiment of the present application.
  • FIG. 14 is a schematic structural diagram of an optical system provided by a seventh embodiment of the present application.
  • FIG. 15 shows the longitudinal spherical aberration curve, astigmatism curve, and distortion curve of the optical system of the seventh embodiment.
  • the optical system involved in the present application is applied to the lens module 20 in the terminal device 30.
  • the terminal device 30 may be a mobile phone, a tablet computer, a drone, a computer, and other devices.
  • the photosensitive element of the lens module 20 is located on the image side of the optical system, and the lens module 20 is assembled inside the terminal device 30.
  • the present application provides a lens module, including a photosensitive element and the optical system provided in the embodiments of the present application.
  • the photosensitive element is located on the image side of the optical system and is used to pass through the first lens to the fifth lens and be incident on the electronic photosensitive element. The light is converted into an electrical signal of the image.
  • the electronic photosensitive element may be a complementary metal oxide semiconductor (Complementary Metal Oxide Semiconductor, CMOS) or a charge-coupled device (Charge-coupled Device, CCD).
  • CMOS Complementary Metal Oxide Semiconductor
  • CCD Charge-coupled Device
  • the application also provides a terminal device, which includes the lens module provided in the embodiment of the application.
  • the terminal device can be a mobile phone, a tablet computer, a drone, a computer, etc.
  • the terminal device By installing the lens module in the terminal device, the terminal device has the characteristics of long focal length and good imaging quality, and high-definition long-range shooting can be realized.
  • An optical system provided by the present application includes five lenses, and the five lenses are sequentially distributed from the object side to the image side as a first lens, a second lens, a third lens, a fourth lens, and a fifth lens.
  • the surface shape and refractive power of the five lenses are as follows:
  • the first lens has positive refractive power, the object side of the first lens is convex at the optical axis; the second lens has refractive power; the third lens has refractive power, the object side of the third lens is concave at the optical axis ;
  • the fourth lens has positive refractive power, the image side of the fourth lens is convex at the optical axis; the fifth lens has refractive power, the object side of the fifth lens is concave at the optical axis, and the image side of the fifth lens Convex at the optical axis.
  • the optical system satisfies the following conditional formula: 0.25 ⁇ ftgtl3/ftltl3 ⁇ 0.8; ftgtl3 is the shortest distance from the object side of the third lens to the image side of the third lens in the direction parallel to the optical axis, and ftltl3 is The longest distance from the object side surface of the third lens to the image side surface of the third lens in a direction parallel to the optical axis.
  • the optical system satisfies the conditional formula: 7mm ⁇ FNO*L1SD/tanFOV ⁇ 15mm;
  • FNO is the aperture number of the optical system
  • L1SD is the aperture of the first lens
  • tanFOV is the optical system The tangent of the maximum angle of view.
  • the aperture number of the optical system and the aperture of the first lens determine the amount of light entering the entire optical system, and the field angle of the optical system determines the imaging field of view range of the optical system.
  • FNO*L1SD/tanFOV both It can make the optical system have enough light and have a suitable field of view range.
  • FNO*L1SD/tanFOV ⁇ 15mm it will cause too much light entering the optical system, resulting in a decrease in optical performance. If FNO*L1SD/tanFOV ⁇ 7mm, will cause the brightness of the imaging surface to decrease, resulting in a decrease in imaging quality.
  • the optical system satisfies the conditional formula: 0.5 ⁇ L1SD/Imgh ⁇ 0.8; L1SD is the aperture of the first lens, and Imgh is the diagonal length of the effective pixel area of the optical system on the imaging surface half.
  • the aperture of the first lens of the optical system determines the amount of light passing through the entire optical system, and the size of the photosensitive surface determines the image clarity and pixel size of the entire optical system.
  • a reasonable configuration of the L1SD/Imgh range can ensure sufficient light passing to ensure image capture. The clarity. If L1SD/Imgh>0.8, it will cause excessive exposure and high brightness, which will affect the picture quality. If L1SD/Imgh ⁇ 0.5, it will cause insufficient light transmission, insufficient light relative brightness, and reduced picture clarity.
  • the optical system satisfies the conditional formula: 1 ⁇ EFL/f1 ⁇ 3; EFL is the effective focal length of the optical system, and f1 is the focal length of the first lens.
  • EFL is the effective focal length of the optical system
  • f1 is the focal length of the first lens.
  • the reasonable configuration of the focal length of the first lens and the effective focal length of the optical system is beneficial to optimize the imaging performance of the optical system and reduce the sensitivity of the system. If EFL/f1 ⁇ 1, the sensitivity of the system will increase, the processing technology will be difficult, and the aberration correction caused by the first lens will be difficult to meet the shooting needs. If EFL/f1>3, the focal length of the first lens The effective focal length configuration of the optical system is inappropriate, and the aberration generated by the first lens cannot be corrected.
  • the optical system satisfies the conditional formula: 0.05 ⁇ airL2/TTL ⁇ 0.35; airL2 is the distance from the image side surface of the second lens to the object side surface of the third lens on the optical axis, and TTL is The distance from the object side surface of the first lens to the imaging surface of the optical system on the optical axis.
  • airL2/TTL it is helpful to reduce the assembly sensitivity of the optical system and improve the assembly yield. If airL2/TTL>0.35, it will cause the system to be too long and fail to meet the miniaturization design requirements. If airL2/TTL ⁇ 0.05, it will increase the sensitivity of the optical system and cause the production yield to decrease.
  • the optical system satisfies the conditional formula: -1 ⁇ (
  • R9 is the object side surface of the fifth lens
  • the radius of curvature at the optical axis, R10 is the radius of curvature of the image side surface of the fifth lens at the optical axis.
  • the optical system further includes a diaphragm, and the optical system satisfies the conditional formula: 0.3 ⁇ DL/TTL ⁇ 0.6; DL is the aperture of the diaphragm of the optical system, and TTL is the first The distance from the object side of a lens to the imaging surface of the optical system on the optical axis.
  • DL/TTL the appropriate range of DL/TTL, it is conducive to the miniaturization of the optical system and provides enough light for shooting to achieve high-quality, high-definition shooting effects.
  • DL/TTL>0.6 it will cause the light aperture to be too large , The edge light enters the optical system and reduces the image quality.
  • DL/TTL ⁇ 0.3 the aperture of the aperture will be too small, which cannot meet the light flux required by the optical system, and cannot achieve the requirements of high-definition shooting in the long-range.
  • the optical system satisfies the conditional formula: FNO/TTL ⁇ 0.5mm -1 ;
  • FNO is the aperture number of the optical system, and TTL is the imaging from the object side of the first lens to the optical system The distance of the face on the optical axis.
  • FNO/TTL the miniaturization of the optical system can be achieved, and sufficient light flux can be provided for long-range shooting to meet the requirements of high-quality and high-definition shooting. If FNO/TTL>0.5mm -1 , it will cause The lack of light through the optical system reduces the sharpness of the captured image.
  • the optical system satisfies the conditional formula: 0.8 ⁇ TTL/EFL ⁇ 1; TTL is the distance from the object side of the first lens to the imaging surface of the optical system on the optical axis, and EFL is the The effective focal length of the optical system is described.
  • TTL/EFL the focal length of the optical system and the total length of the optical system can be reasonably controlled, which can not only realize the miniaturization of the optical system, but also ensure that the light is better concentrated on the imaging surface.
  • TTL/EFL ⁇ 0.8 the total length of the optical system is too short, which will increase the sensitivity of the system, and is not conducive to the convergence of light on the imaging surface.
  • TTL/EFL ⁇ 1 the total length of the optical system will be too long, which will cause the incident to the imaging surface.
  • the chief ray angle is too large, and the edge ray cannot be incident on the photosensitive surface, resulting in incomplete imaging information.
  • the optical system satisfies the conditional formula: 1.5 ⁇ EFL/Imgh ⁇ 2; EFL is the effective focal length of the optical system, and Imgh is the diagonal length of the effective pixel area of the optical system on the imaging surface half.
  • EFL is the effective focal length of the optical system
  • Imgh is the diagonal length of the effective pixel area of the optical system on the imaging surface half.
  • the optical system has good imaging quality.
  • the value of ftgtl3/ftltl3 can be 0.52 or 0.58 or 0.47, and the value of FNO*L1SD/tanFOV can be 12.84mm or 12.91mm or 12.86mm, etc.
  • the value of L1SD/Imgh can be 0.75 or 0.73 or 0.70, etc.
  • the value of EFL/f1 can be 2.29 or 2.27 or 2.43, etc.
  • the value of airL2/TTL can be 0.24 or 0.32 or 0.25, etc.
  • the optical system is equipped with an aspheric lens, which is beneficial to correct system aberrations and improve the imaging quality of the system.
  • the aspheric curve equations include but are not limited to the following equations:
  • Z is the distance from the corresponding point on the aspheric surface to the plane tangent to the apex of the surface
  • r is the distance from the corresponding point on the aspheric surface to the optical axis
  • c is the curvature of the aspheric apex
  • k is the conic constant
  • Ai is the aspheric surface formula The coefficient corresponding to the higher-order item of the i-th term.
  • the straight line 11 represents the optical axis
  • the side of the first lens L1 away from the second lens L2 is the object side 12
  • the side of the fifth lens L5 away from the fourth lens L4 is the image side 13.
  • the stop STO from the object side 12 to the image side 13, there are the stop STO, the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, and the infrared lens in order.
  • Filter element IRCF Filter element
  • the first lens L1 has a positive refractive power and is made of plastic. Its object side surface S1 is convex at the optical axis and at the circumference, and its image side surface S2 is convex at the optical axis and at the circumference, and both are aspherical.
  • the second lens L2 has a negative refractive power and is made of plastic material. Its object side surface S3 is convex at the optical axis and at the circumference, and its image side surface S4 is concave at the optical axis and at the circumference, and both are aspherical.
  • the third lens L3 has a negative refractive power and is made of plastic material. Its object side surface S5 is concave at the optical axis and at the circumference, and its image side surface S6 is concave at the optical axis and at the circumference, and both are aspherical.
  • the fourth lens L4 has positive refractive power and is made of plastic material. Its object side surface S7 is concave at the optical axis and at the circumference, and its image side surface S8 is convex at the optical axis and at the circumference, and both are aspherical.
  • the fifth lens L5 has negative refractive power and is made of plastic. Its object side surface S9 is concave at the optical axis, its object side S9 is convex at the circumference, and its image side S10 is convex at the optical axis and at the circumference. They are all aspherical.
  • the stop STO may be located between the object side of the optical system and the fifth lens.
  • the stop STO in this embodiment is arranged on the side of the first lens L1 away from the second lens L2 for controlling the amount of light entering.
  • the infrared filter element IRCF is arranged behind the fifth lens L5, including the object side S11 and the image side S12.
  • the infrared filter element IRCF is used to filter out infrared light so that the light entering the imaging surface is visible light, and the wavelength of the visible light is 380nm- 780nm, the material of the infrared filter element IRCF is glass.
  • the imaging surface S13 is the surface on which the image formed by the light of the subject passes through the optical system.
  • Table 1a shows the characteristic table of the optical system of this embodiment, where the radius of curvature in this embodiment is the radius of curvature of each lens at the optical axis.
  • EFL is the effective focal length of the optical system
  • FNO is the aperture number of the optical system
  • FOV is the angle of view in the diagonal direction of the optical system
  • TTL is the object side of the first lens to the imaging surface of the optical system on the optical axis the distance.
  • Table 1b shows the high-order coefficients A4, A6, A8, A10, A12, A4, A6, A8, A10, A12, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10 that can be used for each aspheric mirror surface in the first embodiment.
  • FIG. 3 shows the longitudinal spherical aberration curve, astigmatism curve, and distortion curve of the optical system of the first embodiment.
  • the longitudinal spherical aberration curve represents the deviation of the focus point of light of different wavelengths after passing through the lenses of the optical system
  • the astigmatism curve represents the meridional curvature of the field and the sagittal curvature of the field
  • the distortion curve represents the magnitude of distortion corresponding to different field angles .
  • the straight line 11 represents the optical axis
  • the side of the first lens L1 away from the second lens L2 is the object side 12
  • the side of the fifth lens L5 away from the fourth lens L4 is the image side 13.
  • the stop STO from the object side 12 to the image side 13, there are the stop STO, the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, and the infrared lens in order.
  • Filter element IRCF Filter element
  • the first lens L1 has a positive refractive power and is made of plastic. Its object side surface S1 is convex at the optical axis and at the circumference, and its image side surface S2 is convex at the optical axis and at the circumference, and both are aspherical.
  • the second lens L2 has a negative refractive power and is made of plastic material. Its object side surface S3 is convex at the optical axis and at the circumference, and its image side surface S4 is concave at the optical axis and at the circumference, and both are aspherical.
  • the third lens L3 has positive refractive power and is made of plastic material. Its object side surface S5 is concave at the optical axis and at the circumference, its image side surface S6 is convex at the optical axis, and its image side surface S6 is concave at the circumference. They are all aspherical.
  • the fourth lens L4 has positive refractive power and is made of plastic material. Its object side surface S7 is concave at the optical axis and at the circumference, and its image side surface S8 is convex at the optical axis and at the circumference, and both are aspherical.
  • the fifth lens L5 has negative refractive power and is made of plastic. Its object side surface S9 is concave at the optical axis, its object side S9 is convex at the circumference, and its image side S10 is convex at the optical axis and at the circumference. They are all aspherical.
  • the stop STO may be located between the object side of the optical system and the fifth lens.
  • the stop STO in this embodiment is arranged on the side of the first lens L1 away from the second lens L2 for controlling the amount of light entering.
  • the infrared filter element IRCF is arranged behind the fifth lens L5, including the object side S11 and the image side S12.
  • the infrared filter element IRCF is used to filter out infrared light so that the light entering the imaging surface is visible light, and the wavelength of the visible light is 380nm- 780nm, the material of the infrared filter element IRCF is glass.
  • the imaging surface S13 is the surface on which the image formed by the light of the subject passes through the optical system.
  • Table 2a shows the characteristic table of the optical system of this embodiment, where the radius of curvature in this embodiment is the radius of curvature of each lens at the optical axis.
  • EFL is the effective focal length of the optical system
  • FNO is the aperture number of the optical system
  • FOV is the angle of view in the diagonal direction of the optical system
  • TTL is the object side of the first lens to the imaging surface of the optical system on the optical axis the distance.
  • Table 2b shows the high-order term coefficients A4, A6, A8, A10, A12, A4, A6, A8, A10, A12, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10 that can be used for each aspheric mirror surface in the second embodiment.
  • FIG. 5 shows the longitudinal spherical aberration curve, astigmatism curve, and distortion curve of the optical system of the second embodiment.
  • the longitudinal spherical aberration curve represents the deviation of the focus point of light of different wavelengths after passing through the lenses of the optical system
  • the astigmatism curve represents the meridional curvature of the field and the sagittal curvature of the field
  • the distortion curve represents the magnitude of distortion corresponding to different field angles .
  • the straight line 11 represents the optical axis
  • the side of the first lens L1 away from the second lens L2 is the object side 12
  • the side of the fifth lens L5 away from the fourth lens L4 is the image side 13.
  • the stop STO from the object side 12 to the image side 13, there are the stop STO, the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, and the infrared lens in order.
  • Filter element IRCF Filter element
  • the first lens L1 has a positive refractive power and is made of plastic. Its object side surface S1 is convex at the optical axis and at the circumference, and its image side surface S2 is convex at the optical axis and at the circumference, and both are aspherical.
  • the second lens L2 has a negative refractive power and is made of plastic. Its object side surface S3 is convex at the optical axis and at the circumference, and its image side surface S4 at the optical axis and at the circumference is concave, and both are aspherical. .
  • the third lens L3 has a negative refractive power and is made of plastic material. Its object side surface S5 is concave at the optical axis and at the circumference, and its image side surface S6 is concave at the optical axis and at the circumference, and both are aspherical.
  • the fourth lens L4 has positive refractive power and is made of plastic. Its object side surface S7 is convex at the optical axis, its object side surface S7 is concave at the circumference, and its image side surface S8 is convex at the optical axis and at the circumference. And they are all aspherical.
  • the fifth lens L5 has positive refractive power and is made of plastic. Its object side surface S9 is concave at the optical axis, its object side surface S9 is convex at the circumference, and its image side surface S10 is convex at the optical axis and at the circumference. They are all aspherical.
  • the stop STO may be located between the object side of the optical system and the fifth lens.
  • the stop STO in this embodiment is arranged on the side of the first lens L1 away from the second lens L2 for controlling the amount of light entering.
  • the infrared filter element IRCF is arranged behind the fifth lens L5, including the object side S11 and the image side S12.
  • the infrared filter element IRCF is used to filter out infrared light so that the light entering the imaging surface is visible light, and the wavelength of the visible light is 380nm- 780nm, the material of the infrared filter element IRCF is glass.
  • the imaging surface S13 is the surface on which the image formed by the light of the subject passes through the optical system.
  • Table 3a shows the characteristic table of the optical system of this embodiment, where the radius of curvature in this embodiment is the radius of curvature of each lens at the optical axis.
  • EFL is the effective focal length of the optical system
  • FNO is the aperture number of the optical system
  • FOV is the angle of view in the diagonal direction of the optical system
  • TTL is the object side of the first lens to the imaging surface of the optical system on the optical axis the distance.
  • Table 3b shows the high-order coefficients A4, A6, A8, A10, A12, A4, A6, A8, A10, A12, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10 that can be used for each aspheric mirror surface in the third embodiment.
  • FIG. 7 shows the longitudinal spherical aberration curve, astigmatism curve, and distortion curve of the optical system of the third embodiment.
  • the longitudinal spherical aberration curve represents the deviation of the focus point of light of different wavelengths after passing through the lenses of the optical system
  • the astigmatism curve represents the meridional curvature of the field and the sagittal curvature of the field
  • the distortion curve represents the magnitude of distortion corresponding to different field angles .
  • the straight line 11 represents the optical axis
  • the side of the first lens L1 away from the second lens L2 is the object side 12
  • the side of the fifth lens L5 away from the fourth lens L4 is the image side 13.
  • the stop STO from the object side 12 to the image side 13, there are the stop STO, the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, and the infrared lens in order.
  • Filter element IRCF Filter element
  • the first lens L1 has a positive refractive power and is made of plastic material. Its object side surface S1 is convex at the optical axis and at the circumference, its image side surface S2 is concave at the optical axis, and its image side surface S2 is convex at the circumference. They are all aspherical.
  • the second lens L2 has positive refractive power and is made of plastic material. Its object side surface S3 is convex at the optical axis and at the circumference, its image side surface S4 is convex at the optical axis, and its image side surface S4 is concave at the circumference. They are all aspherical.
  • the third lens L3 has a negative refractive power and is made of plastic material. Its object side surface S5 is concave at the optical axis and at the circumference, and its image side surface S6 is concave at the optical axis and at the circumference, and both are aspherical.
  • the fourth lens L4 has positive refractive power and is made of plastic material. Its object side surface S7 is concave at the optical axis and at the circumference, and its image side surface S8 is convex at the optical axis and at the circumference, and both are aspherical.
  • the fifth lens L5 has a negative refractive power and is made of plastic. Its object side surface S9 is concave at the optical axis and the circumference, and its image side surface S10 is convex at the optical axis and the circumference, and both are aspherical.
  • the stop STO may be located between the object side of the optical system and the fifth lens.
  • the stop STO in this embodiment is arranged on the side of the first lens L1 away from the second lens L2 for controlling the amount of light entering.
  • the imaging surface S13 is the surface on which the image formed by the light of the subject passes through the optical system.
  • Table 4a shows the characteristic table of the optical system of this embodiment, where the radius of curvature in this embodiment is the radius of curvature of each lens at the optical axis.
  • EFL is the effective focal length of the optical system
  • FNO is the aperture number of the optical system
  • FOV is the angle of view in the diagonal direction of the optical system
  • TTL is the object side of the first lens to the imaging surface of the optical system on the optical axis the distance.
  • Table 4b shows the high-order coefficients A4, A6, A8, A10, A12, A4, A6, A8, A10, A12, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10 that can be used for each aspheric mirror surface in the fourth embodiment.
  • FIG. 9 shows the longitudinal spherical aberration curve, astigmatism curve, and distortion curve of the optical system of the fourth embodiment.
  • the longitudinal spherical aberration curve represents the deviation of the focus point of light of different wavelengths after passing through the lenses of the optical system
  • the astigmatism curve represents the meridional curvature of the field and the sagittal curvature of the field
  • the distortion curve represents the magnitude of distortion corresponding to different field angles .
  • the straight line 11 represents the optical axis
  • the side of the first lens L1 away from the second lens L2 is the object side 12
  • the side of the fifth lens L5 away from the fourth lens L4 is the image side 13.
  • the stop STO from the object side 12 to the image side 13, there are the stop STO, the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, and the infrared lens in order.
  • Filter element IRCF Filter element
  • the first lens L1 has a positive refractive power and is made of plastic. Its object side surface S1 is convex at the optical axis and at the circumference, and its image side surface S2 is convex at the optical axis and at the circumference, and both are aspherical.
  • the second lens L2 has negative refractive power and is made of plastic. Its object side surface S3 is concave at the optical axis, its object side S3 is convex at the circumference, and its image side S4 is concave at the optical axis and at the circumference. They are all aspherical.
  • the third lens L3 has a negative refractive power and is made of plastic material. Its object side surface S5 is concave at the optical axis and at the circumference, and its image side surface S6 is concave at the optical axis and at the circumference, and both are aspherical.
  • the fourth lens L4 has positive refractive power and is made of plastic. Its object side surface S7 is convex at the optical axis, its object side surface S7 is concave at the circumference, and its image side surface S8 is convex at the optical axis and at the circumference. And they are all aspherical.
  • the fifth lens L5 has a negative refractive power and is made of plastic. Its object side surface S9 is concave at the optical axis and the circumference, and its image side surface S10 is convex at the optical axis and the circumference, and both are aspherical.
  • the stop STO may be located between the object side of the optical system and the fifth lens.
  • the stop STO in this embodiment is arranged on the side of the first lens L1 away from the second lens L2 for controlling the amount of light entering.
  • the infrared filter element IRCF is arranged behind the fifth lens L5, including the object side S11 and the image side S12.
  • the infrared filter element IRCF is used to filter out infrared light so that the light entering the imaging surface is visible light, and the wavelength of the visible light is 380nm- 780nm, the material of the infrared filter element IRCF is glass.
  • the imaging surface S13 is the surface on which the image formed by the light of the subject passes through the optical system.
  • Table 5a shows the characteristic table of the optical system of this embodiment, where the radius of curvature in this embodiment is the radius of curvature of each lens at the optical axis.
  • EFL is the effective focal length of the optical system
  • FNO is the aperture number of the optical system
  • FOV is the angle of view in the diagonal direction of the optical system
  • TTL is the object side of the first lens to the imaging surface of the optical system on the optical axis the distance.
  • Table 5b shows the higher order term coefficients A4, A6, A8, A10, A12, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10 that can be used for each aspheric mirror surface in the fifth embodiment.
  • FIG. 11 shows the longitudinal spherical aberration curve, astigmatism curve, and distortion curve of the optical system of the fifth embodiment.
  • the longitudinal spherical aberration curve represents the deviation of the focus point of light of different wavelengths after passing through the lenses of the optical system
  • the astigmatism curve represents the meridional curvature of the field and the sagittal curvature of the field
  • the distortion curve represents the magnitude of distortion corresponding to different field angles .
  • the straight line 11 represents the optical axis
  • the side of the first lens L1 away from the second lens L2 is the object side 12
  • the side of the fifth lens L5 away from the fourth lens L4 is the image side 13.
  • the stop STO from the object side 12 to the image side 13, there are the stop STO, the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, and the infrared lens in order.
  • Filter element IRCF Filter element
  • the first lens L1 has a positive refractive power and is made of plastic. Its object side surface S1 is convex at the optical axis and at the circumference, and its image side surface S2 is convex at the optical axis and at the circumference, and both are aspherical.
  • the second lens L2 has a negative refractive power and is made of plastic material. Its object side surface S3 is convex at the optical axis and at the circumference, and its image side surface S4 is concave at the optical axis and at the circumference, and both are aspherical.
  • the third lens L3 has negative refractive power and is made of plastic. Its object side surface S5 is concave at the optical axis and at the circumference, its image side surface S6 is convex at the optical axis, and its image side surface S6 is concave at the circumference. They are all aspherical.
  • the fourth lens L4 has positive refractive power and is made of plastic material. Its object side surface S7 is concave at the optical axis and at the circumference, and its image side surface S8 is convex at the optical axis and at the circumference, and both are aspherical.
  • the fifth lens L5 has a negative refractive power and is made of plastic. Its object side surface S9 is concave at the optical axis and the circumference, and its image side surface S10 is convex at the optical axis and the circumference, and both are aspherical.
  • the stop STO may be located between the object side of the optical system and the fifth lens.
  • the stop STO in this embodiment is arranged on the side of the first lens L1 away from the second lens L2 for controlling the amount of light entering.
  • the infrared filter element IRCF is arranged behind the fifth lens L5, including the object side S11 and the image side S12.
  • the infrared filter element IRCF is used to filter out infrared light so that the light entering the imaging surface is visible light, and the wavelength of the visible light is 380nm- 780nm, the material of the infrared filter element IRCF is glass.
  • the imaging surface S13 is the surface on which the image formed by the light of the subject passes through the optical system.
  • Table 6a shows a characteristic table of the optical system of this embodiment, where the radius of curvature in this embodiment is the radius of curvature of each lens at the optical axis.
  • EFL is the effective focal length of the optical system
  • FNO is the aperture number of the optical system
  • FOV is the angle of view in the diagonal direction of the optical system
  • TTL is the object side of the first lens to the imaging surface of the optical system on the optical axis the distance.
  • Table 6b shows the high-order term coefficients A4, A6, A8, A10, A12, A4, A6, A8, A10, A12, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10 that can be used in the sixth embodiment.
  • FIG. 13 shows the longitudinal spherical aberration curve, astigmatism curve, and distortion curve of the optical system of the sixth embodiment.
  • the longitudinal spherical aberration curve represents the deviation of the focus point of light of different wavelengths after passing through the lenses of the optical system
  • the astigmatism curve represents the meridional curvature of the field and the sagittal curvature of the field
  • the distortion curve represents the magnitude of distortion corresponding to different field angles .
  • the straight line 11 represents the optical axis
  • the side of the first lens L1 away from the second lens L2 is the object side 12
  • the side of the fifth lens L5 away from the fourth lens L4 is the image side 13.
  • the stop STO from the object side 12 to the image side 13, there are the stop STO, the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, and the infrared lens in order.
  • Filter element IRCF Filter element
  • the first lens L1 has a positive refractive power and is made of plastic. Its object side surface S1 is convex at the optical axis and at the circumference, and its image side surface S2 is convex at the optical axis and at the circumference, and both are aspherical.
  • the second lens L2 has a negative refractive power and is made of plastic material. Its object side surface S3 is convex at the optical axis and at the circumference, and its image side surface S4 is concave at the optical axis and at the circumference, and both are aspherical.
  • the third lens L3 has negative refractive power and is made of plastic. Its object side surface S5 is concave at the optical axis and at the circumference, its image side surface S6 is convex at the optical axis, and its image side surface S6 is concave at the circumference. They are all aspherical.
  • the fourth lens L4 has positive refractive power and is made of plastic material. Its object side surface S7 is concave at the optical axis and at the circumference, and its image side surface S8 is convex at the optical axis and at the circumference, and both are aspherical.
  • the fifth lens L5 has a negative refractive power and is made of plastic. Its object side surface S9 is concave at the optical axis and the circumference, and its image side surface S10 is convex at the optical axis and the circumference, and both are aspherical.
  • the stop STO may be located between the object side of the optical system and the fifth lens.
  • the stop STO in this embodiment is arranged on the side of the first lens L1 away from the second lens L2 for controlling the amount of light entering.
  • the infrared filter element IRCF is arranged behind the fifth lens L5, including the object side S11 and the image side S12.
  • the infrared filter element IRCF is used to filter out infrared light so that the light entering the imaging surface is visible light, and the wavelength of the visible light is 380nm- 780nm, the material of the infrared filter element IRCF is glass.
  • the imaging surface S13 is the surface on which the image formed by the light of the subject passes through the optical system.
  • Table 7a shows a characteristic table of the optical system of this embodiment, where the radius of curvature in this embodiment is the radius of curvature of each lens at the optical axis.
  • EFL is the effective focal length of the optical system
  • FNO is the aperture number of the optical system
  • FOV is the angle of view in the diagonal direction of the optical system
  • TTL is the object side of the first lens to the imaging surface of the optical system on the optical axis the distance.
  • Table 7b shows the high-order term coefficients A4, A6, A8, A10, A12, A4, A6, A8, A10, A12, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10 that can be used in the seventh embodiment.
  • FIG. 15 shows the longitudinal spherical aberration curve, astigmatism curve, and distortion curve of the optical system of the seventh embodiment.
  • the longitudinal spherical aberration curve represents the deviation of the focus point of light of different wavelengths after passing through the lenses of the optical system
  • the astigmatism curve represents the meridional curvature of the field and the sagittal curvature of the field
  • the distortion curve represents the magnitude of distortion corresponding to different field angles .
  • Table 8 shows the ftgtl3/ftltl3, FNO*L1SD/tanFOV, L1SD/Imgh, EFL/f1, airL2/TTL, (
  • each embodiment can satisfy: 0.25 ⁇ ftgtl3/ftltl3 ⁇ 0.8, 7mm ⁇ FNO*L1SD/tanFOV ⁇ 15mm, 0.5 ⁇ L1SD/Imgh ⁇ 0.8, 1 ⁇ EFL/f1 ⁇ 3, 0.05 ⁇ airL2/ TTL ⁇ 0.35, -1 ⁇ (

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Abstract

一种光学系统、镜头模组（20）及终端设备（30）。光学系统包括具有正屈折力的第一透镜（L1）和第四透镜（L4），具有屈折力的第二透镜（L2）、第三透镜（L3）和第五透镜（L5），第一透镜（L1）的物侧面于光轴（11）处为凸面，第三透镜（L3）的物侧面于光轴（11）处为凹面，第四透镜（L4）的像侧面于光轴（11）处为凸面，第五透镜（L5）的物侧面于光轴（11）处为凹面，第五透镜（L5）的像侧面于光轴（11）处为凸面。光学系统满足以下条件式：0.25＜ftgtl3/ftltl3＜0.8，ftgtl3和ftltl3分别为第三透镜（L3）的物侧面至第三透镜（L3）的像侧面于平行于光轴（11）方向的最短和最长的距离。通过合理配置光学系统中第一透镜（L1）至第五透镜（L5）的屈折力及第一透镜（L1）、第三透镜（L3）、第四透镜（L4）和第五透镜（L5）的面型，使得光学系统具有长焦距的特性，并具有良好的成像质量，可以实现高清晰的远景拍摄。

Description

光学系统、镜头模组及终端设备 技术领域
本申请属于光学成像技术领域，尤其涉及一种光学系统、镜头模组及终端设备。
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，各种科技改进推陈出新。其中，新型电子产品中摄像镜头拍摄效果的改进创新成为人们关注的重点。
目前随着远景拍摄需求的增大，摄像镜头需要具有长焦距，但容易出现像场弯曲的问题且整体成像质量难以得到保证，导致远景摄影效果不佳。
因此，如何实现远景拍摄及高清晰拍摄并避免像场弯曲的问题，以使物距较远的景象清晰的成像于成像面上应为业界的研发方向。
发明内容
本申请实施例提供一种光学系统、镜头模组及终端设备，该光学系统解决了远景拍摄成像质量不佳的问题，可以实现高清晰的远景拍摄。
第一方面，本申请实施例提供了一种光学系统，从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于光轴处为凸面；第二透镜，具有屈折力；第三透镜，具有屈折力，所述第三透镜的物侧面于光轴处为凹面；第四透镜，具有正屈折力，所述第四透镜的像侧面于光轴处为凸面；第五透镜，具有屈折力，所述第五透镜的物侧面于光轴处为凹面，所述第五透镜的像侧面于光轴处为凸面；所述光学系统满足以下条件式：0.25<ftgtl3/ftltl3<0.8；ftgtl3为所述第三透镜的物侧面至所述第三透镜的像侧面于平行于光轴方向的最短的距离，ftltl3为所述第三透镜的物侧面至所述第三透镜的像侧面于平行于光轴方向的最长的距离。
本申请通过合理配置光学系统中第一透镜至第五透镜的屈折力及第一透镜、第三透镜、第四透镜和第五透镜的面型，使得光学系统具有长焦距的特性，并具有良好的成像质量，可以实现高清晰的远景拍摄，同时设置0.25<ftgtl3/ftltl3<0.8可有效平衡光学系统的光程差，实现修正场曲的功能，避免图像的周围出现扭曲，使得成像效果更接近于被拍摄物体本身，且使拍摄的画面具有高画质感、高分辨率和高清晰度。
一种实施方式中，所述光学系统满足条件式：7mm<FNO*L1SD/tanFOV<15mm；FNO为所述光学系统的光圈数，L1SD为所述第一透镜的孔径，tanFOV为所述光学系统的最大视场角的正切值。光学系统的光圈数及第一透镜的孔径决定了整个光学系统的进光量，光学系统的视场角大小又决定了光学系统的成像视场范围，通过对FNO*L1SD/tanFOV的合理限定，既能使光学系统具有足够的通光量又能具有合适的视场范围，如果FNO*L1SD/tanFOV≥15mm，会造成进入光学系统的光线量过大，导致光学性能下降，如果FNO*L1SD/tanFOV<7mm，会导致成像面光亮度降低，造成成像质量下降。
一种实施方式中，所述光学系统满足条件式：0.5<L1SD/Imgh<0.8；L1SD为所述第一透镜的孔径，Imgh为所述光学系统于成像面上有效像素区域对角线长度的一半。光学系统的第一透镜的孔径决定了整个光学系统的通光量，感光面的尺寸决定了整个光学系统画面清晰度及像 素大小，合理配置L1SD/Imgh的范围才能保证足够的通光量，保证拍摄图像的清晰度。如果L1SD/Imgh>0.8，则会造成曝光过大，光亮度太高，影响画面质量，如果L1SD/Imgh<0.5，则会造成通光量不足，光线相对亮度不够，画面清晰度下降。
一种实施方式中，所述光学系统满足条件式：1<EFL/f1<3；EFL为所述光学系统的有效焦距，f1为所述第一透镜的焦距。第一透镜的焦距与光学系统的有效焦距的合理配置有利于光学系统的成像性能达到最优化并降低系统敏感性。如果EFL/f1≤1，会造成系统敏感度增加，加工工艺困难，并且由第一透镜产生的像差修正难度加大，难以满足拍摄需求，如果EFL/f1＞3，第一透镜的焦距与光学系统的有效焦距配置不合适，不能校正由第一透镜产生的像差。
一种实施方式中，所述光学系统满足条件式：0.05<airL2/TTL<0.35；airL2为所述第二透镜的像侧面至所述第三透镜的物侧面于光轴上的距离，TTL为所述第一透镜的物侧面至所述光学系统的成像面于光轴上的距离。通过对airL2/TTL的范围的合理限定，有利于降低光学系统的组装敏感性，提升组装良率，如果airL2/TTL>0.35，会造成系统过长，无法满足小型化设计要求，如果airL2/TTL<0.05，则会增加光学系统的敏感性而造成生产良率降低。
一种实施方式中，所述光学系统满足条件式：-1<(|R9|-|R10|)/(|R9|+|R10|)<0.1；R9为所述第五透镜的物侧面于光轴处的曲率半径，R10为所述第五透镜的像侧面于光轴处的曲率半径。通过限定(|R9|-|R10|)/(|R9|+|R10|)的范围，可修正光学系统的球差，平衡光学系统的光程差，校正场曲，同时降低系统敏感性，提高组装稳定性。如果(|R9|-|R10|)/(|R9|+|R10|)>0.1，则会造成光学系统场曲过大，如果(|R9|-|R10|)/(|R9|+|R10|)<-1，则会造成系统敏感性增大，降低生产良率。
一种实施方式中，所述光学系统还包括光阑，所述光学系统满足条件式：0.3<DL/TTL<0.6；DL为所述光学系统的所述光阑的孔径，TTL为所述第一透镜的物侧面至所述光学系统的成像面于光轴上的距离。通过限定DL/TTL的合适范围，有利于光学系统的小型化并为拍摄提供足够的通光量，实现高画质、高清晰的拍摄效果，如果DL/TTL>0.6，会造成通光口径过大，边缘光线进入光学系统，降低成像质量，如果DL/TTL<0.3，会造成光阑通光口径过小，无法满足光学系统所需的通光量，实现不了远景高清晰拍摄要求。
一种实施方式中，所述光学系统满足条件式：FNO/TTL<0.5mm -1；FNO为所述光学系统的光圈数，TTL为所述第一透镜的物侧面至所述光学系统的成像面于光轴上的距离。通过限定FNO/TTL的合适范围可实现光学系统的小型化，又能为远景拍摄提供足够的通光量，满足高画质、高清晰的拍摄需求，如果FNO/TTL>0.5mm -1，会造成光学系统的通光量不足，使得拍摄出的画面清晰度下降。
一种实施方式中，所述光学系统满足条件式：0.8<TTL/EFL<1；TTL为所述第一透镜的物侧面至所述光学系统的成像面于光轴上的距离，EFL为所述光学系统的有效焦距。通过限定TTL/EFL的范围可以合理控制光学系统的焦距以及光学系统总长，不仅能够实现光学系统小型化，同时能保证光线更好的汇聚于成像面上。如果TTL/EFL≤0.8，光学系统总长太短，会造成系统敏感度增加，同时不利于光线在成像面上汇聚，如果TTL/EFL≥1，光学系统总长太长，会造成入射至成像面的主光线角度太大，边缘光线则无法入射在感光面上，造成成像信息不全。
一种实施方式中，所述光学系统满足条件式：1.5<EFL/Imgh<2；EFL为所述光学系统的有效焦距，Imgh为所述光学系统于成像面上有效像素区域对角线长度的一半。通过限定EFL/Imgh 的范围可以合理控制光学系统的焦距及像高，不仅能实现高清晰的远景拍摄，同时能保证光线更好的汇聚于成像面上。如果EFL/Imgh≤1.5，在保证像高不变的情况下焦距会减小，则无法满足远景拍摄的需求，如果EFL/Imgh≥2，则无法保证光线在成像面上汇聚。
第二方面，本申请提供一种镜头模组，包括感光元件和前述任意一种实施方式所述的光学系统，所述感光元件位于所述光学系统的像侧。
第三方面，本申请提供一种终端设备，包括所述的镜头模组。
本申请通过合理配置光学系统中第一透镜至第五透镜的屈折力及第一透镜、第三透镜、第四透镜和第五透镜的面型，使得光学系统具有长焦距的特性，并具有良好的成像质量，可以实现高清晰的远景拍摄，同时设置0.25<ftgtl3/ftltl3<0.8可有效平衡光学系统的光程差，实现修正场曲的功能，避免图像的周围出现扭曲，使得成像效果更接近于被拍摄物体本身，且使拍摄的画面具有高画质感、高分辨率和高清晰度。
附图说明
为了更清楚地说明本申请实施例或背景技术中的技术方案，下面将对本申请实施例或背景技术中所需要使用的附图进行说明。
图1是本申请提供的光学系统应用在终端设备中的示意图；
图2是本申请第一实施例提供的光学系统的结构示意图；
图3是第一实施例的光学系统的纵向球差曲线、像散曲线和畸变曲线；
图4是本申请第二实施例提供的光学系统的结构示意图；
图5是第二实施例的光学系统的纵向球差曲线、像散曲线和畸变曲线；
图6是本申请第三实施例提供的光学系统的结构示意图；
图7是第三实施例的光学系统的纵向球差曲线、像散曲线和畸变曲线；
图8是本申请第四实施例提供的光学系统的结构示意图；
图9是第四实施例的光学系统的纵向球差曲线、像散曲线和畸变曲线；
图10是本申请第五实施例提供的光学系统的结构示意图；
图11是第五实施例的光学系统的纵向球差曲线、像散曲线和畸变曲线；
图12是本申请第六实施例提供的光学系统的结构示意图；
图13是第六实施例的光学系统的纵向球差曲线、像散曲线和畸变曲线；
图14是本申请第七实施例提供的光学系统的结构示意图；
图15是第七实施例的光学系统的纵向球差曲线、像散曲线和畸变曲线。
具体实施方式
下面结合本申请实施例中的附图对本申请实施例进行描述。
参阅图1，本申请涉及的光学系统应用在终端设备30中的镜头模组20。终端设备30可以为手机、平板电脑、无人机、计算机等设备。镜头模组20的感光元件位于光学系统的像侧，镜头模组20组装在终端设备30内部。
本申请提供一种镜头模组，包括感光元件和本申请实施例提供的光学系统，感光元件位于光学系统的像侧，用于将穿过第一透镜至第五透镜且入射到电子感光元件上的光线转换成图像 的电信号。电子感光元件可以为互补金属氧化物半导体(Complementary Metal Oxide Semiconductor，CMOS)或电荷耦合器件(Charge-coupled Device，CCD)。通过在镜头模组内安装该光学系统，使镜头模组具有长焦距的特性，并具有良好的成像质量，可以实现高清晰的远景拍摄。
本申请还提供一种终端设备，该终端设备包括本申请实施例提供的镜头模组。该终端设备可以为手机、平板电脑、无人机、计算机等。通过在终端设备内安装该镜头模组，使终端设备具有长焦距的特性，并具有良好的成像质量，可以实现高清晰的远景拍摄。
本申请提供的一种光学系统包括五个透镜，五个透镜从物侧至像侧依序分布分别为第一透镜、第二透镜、第三透镜、第四透镜和第五透镜。
具体的，五片透镜的面型及屈折力如下：
第一透镜，具有正屈折力，第一透镜的物侧面于光轴处为凸面；第二透镜，具有屈折力；第三透镜，具有屈折力，第三透镜的物侧面于光轴处为凹面；第四透镜，具有正屈折力，第四透镜的像侧面于光轴处为凸面；第五透镜，具有屈折力，第五透镜的物侧面于光轴处为凹面，第五透镜的像侧面于光轴处为凸面。
所述光学系统满足以下条件式：0.25<ftgtl3/ftltl3<0.8；ftgtl3为所述第三透镜的物侧面至所述第三透镜的像侧面于平行于光轴方向的最短的距离，ftltl3为所述第三透镜的物侧面至所述第三透镜的像侧面于平行于光轴方向的最长的距离。
合理配置光学系统中第一透镜至第五透镜的屈折力及第一透镜、第三透镜、第四透镜和第五透镜的面型，使得光学系统具有长焦距的特性，并具有良好的成像质量，可以实现高清晰的远景拍摄，同时设置0.25<ftgtl3/ftltl3<0.8可有效平衡光学系统的光程差，实现修正场曲的功能，避免图像的周围出现扭曲，使得成像效果更接近于被拍摄物体本身，且使拍摄的画面具有高画质感、高分辨率和高清晰度。
一种实施方式中，所述光学系统满足条件式：7mm<FNO*L1SD/tanFOV<15mm；FNO为所述光学系统的光圈数，L1SD为所述第一透镜的孔径，tanFOV为所述光学系统的最大视场角的正切值。光学系统的光圈数及第一透镜的孔径决定了整个光学系统的进光量，光学系统的视场角大小又决定了光学系统的成像视场范围，通过对FNO*L1SD/tanFOV的合理限定，既能使光学系统具有足够的通光量又能具有合适的视场范围，如果FNO*L1SD/tanFOV≥15mm，会造成进入光学系统的光线量过大，导致光学性能下降，如果FNO*L1SD/tanFOV<7mm，会导致成像面光亮度降低，造成成像质量下降。
一种实施方式中，所述光学系统满足条件式：0.5<L1SD/Imgh<0.8；L1SD为所述第一透镜的孔径，Imgh为所述光学系统于成像面上有效像素区域对角线长度的一半。光学系统的第一透镜的孔径决定了整个光学系统的通光量，感光面的尺寸决定了整个光学系统画面清晰度及像素大小，合理配置L1SD/Imgh的范围才能保证足够的通光量，保证拍摄图像的清晰度。如果L1SD/Imgh>0.8，则会造成曝光过大，光亮度太高，影响画面质量，如果L1SD/Imgh<0.5，则会造成通光量不足，光线相对亮度不够，画面清晰度下降。
一种实施方式中，所述光学系统满足条件式：1<EFL/f1<3；EFL为所述光学系统的有效焦距，f1为所述第一透镜的焦距。第一透镜的焦距与光学系统的有效焦距的合理配置有利于光学系统的成像性能达到最优化并降低系统敏感性。如果EFL/f1≤1，会造成系统敏感度增加，加 工工艺困难，并且由第一透镜产生的像差修正难度加大，难以满足拍摄需求，如果EFL/f1＞3，第一透镜的焦距与光学系统的有效焦距配置不合适，不能校正由第一透镜产生的像差。
一种实施方式中，所述光学系统满足条件式：0.05<airL2/TTL<0.35；airL2为所述第二透镜的像侧面至所述第三透镜的物侧面于光轴上的距离，TTL为所述第一透镜的物侧面至所述光学系统的成像面于光轴上的距离。通过对airL2/TTL的范围的合理限定，有利于降低光学系统的组装敏感性，提升组装良率，如果airL2/TTL>0.35，会造成系统过长，无法满足小型化设计要求，如果airL2/TTL<0.05，则会增加光学系统的敏感性而造成生产良率降低。
一种实施方式中，所述光学系统满足条件式：-1<(|R9|-|R10|)/(|R9|+|R10|)<0.1；R9为所述第五透镜的物侧面于光轴处的曲率半径，R10为所述第五透镜的像侧面于光轴处的曲率半径。通过限定(|R9|-|R10|)/(|R9|+|R10|)的范围，可修正光学系统的球差，平衡光学系统的光程差，校正场曲，同时降低系统敏感性，提高组装稳定性。如果(|R9|-|R10|)/(|R9|+|R10|)>0.1，则会造成光学系统场曲过大，如果(|R9|-|R10|)/(|R9|+|R10|)<-1，则会造成系统敏感性增大，降低生产良率。
一种实施方式中，所述光学系统还包括光阑，所述光学系统满足条件式：0.3<DL/TTL<0.6；DL为所述光学系统的所述光阑的孔径，TTL为所述第一透镜的物侧面至所述光学系统的成像面于光轴上的距离。通过限定DL/TTL的合适范围，有利于光学系统的小型化并为拍摄提供足够的通光量，实现高画质、高清晰的拍摄效果，如果DL/TTL>0.6，会造成通光口径过大，边缘光线进入光学系统，降低成像质量，如果DL/TTL<0.3，会造成光阑通光口径过小，无法满足光学系统所需的通光量，实现不了远景高清晰拍摄要求。
一种实施方式中，所述光学系统满足条件式：FNO/TTL<0.5mm -1；FNO为所述光学系统的光圈数，TTL为所述第一透镜的物侧面至所述光学系统的成像面于光轴上的距离。通过限定FNO/TTL的合适范围可实现光学系统的小型化，又能为远景拍摄提供足够的通光量，满足高画质、高清晰的拍摄需求，如果FNO/TTL>0.5mm -1，会造成光学系统的通光量不足，使得拍摄出的画面清晰度下降。
一种实施方式中，所述光学系统满足条件式：0.8<TTL/EFL<1；TTL为所述第一透镜的物侧面至所述光学系统的成像面于光轴上的距离，EFL为所述光学系统的有效焦距。通过限定TTL/EFL的范围可以合理控制光学系统的焦距以及光学系统总长，不仅能够实现光学系统小型化，同时能保证光线更好的汇聚于成像面上。如果TTL/EFL≤0.8，光学系统总长太短，会造成系统敏感度增加，同时不利于光线在成像面上汇聚，如果TTL/EFL≥1，光学系统总长太长，会造成入射至成像面的主光线角度太大，边缘光线则无法入射在感光面上，造成成像信息不全。
一种实施方式中，所述光学系统满足条件式：1.5<EFL/Imgh<2；EFL为所述光学系统的有效焦距，Imgh为所述光学系统于成像面上有效像素区域对角线长度的一半。通过限定EFL/Imgh的范围可以合理控制光学系统的焦距及像高，不仅能实现高清晰的远景拍摄，同时能保证光线更好的汇聚于成像面上。如果EFL/Imgh≤1.5，在保证像高不变的情况下焦距会减小，则无法满足远景拍摄的需求，如果EFL/Imgh≥2，则无法保证光线在成像面上汇聚。
通过上述各个参数的限定，使得光学系统具有良好的成像品质，例如，优选的：ftgtl3/ftltl3的值可以为0.52或0.58或0.47等，FNO*L1SD/tanFOV的值可以为12.84mm或12.91mm或12.86mm等，L1SD/Imgh的值可以为0.75或0.73或0.70等，EFL/f1的值可以为2.29或2.27 或2.43等，airL2/TTL的值可以为0.24或0.32或0.25等。
光学系统设有非球面的透镜，有利于校正系统像差，提高系统成像质量。非球面曲线方程式包括但不限于如下方程式：
Figure PCTCN2020083348-appb-000001
其中，Z是非球面上相应点到与表面顶点相切的平面的距离，r是非球面上相应点到光轴的距离，c是非球面顶点的曲率，k是圆锥常数，Ai为非球面面型公式中与第i项高次项相对应的系数。
以下通过七个具体的实施例对本申请进行详细的说明。
实施例一
如图2所示，直线11表示光轴，第一个透镜L1远离第二透镜L2的一侧为物侧12，第五透镜L5远离第四透镜L4的一侧为像侧13。本实施例提供的光学系统中，从物侧12到像侧13依次为光阑STO、第一个透镜L1、第二透镜L2、第三透镜L3、第四透镜L4、第五透镜L5、红外滤光元件IRCF。
第一透镜L1具有正屈折力，且为塑料材质，其物侧面S1于光轴处和于圆周处为凸面，其像侧面S2于光轴处和于圆周处为凸面，并皆为非球面。
第二透镜L2具有负屈折力，且为塑料材质，其物侧面S3于光轴处和于圆周处为凸面，其像侧面S4于光轴处和于圆周处为凹面，并皆为非球面。
第三透镜L3具有负屈折力，且为塑料材质，其物侧面S5于光轴处和于圆周处为凹面，其像侧面S6于光轴处和于圆周处为凹面，并皆为非球面。
第四透镜L4具有正屈折力，且为塑料材质，其物侧面S7于光轴处和于圆周处为凹面，其像侧面S8于光轴处和于圆周处为凸面，且皆为非球面。
第五透镜L5具有负屈折力，且为塑料材质，其物侧面S9于光轴处为凹面，其物侧面S9于圆周处为凸面，其像侧面S10于光轴处和于圆周处为凸面，并皆为非球面。
光阑STO可以位于光学系统物侧与第五透镜之间，本实施例中的光阑STO设置在第一透镜L1远离第二透镜L2的一侧，用于控制进光量。
红外滤光元件IRCF设置在第五透镜L5之后，包括物侧面S11和像侧面S12，红外滤光元件IRCF用于过滤掉红外光线，使得射入成像面的光线为可见光，可见光的波长为380nm-780nm，红外滤光元件IRCF的材质为玻璃。
成像面S13为被摄物体的光通过光学系统后形成的像所在的面。
表1a示出了本实施例的光学系统的特性表格，其中，本实施例中的曲率半径为各透镜于光轴处的曲率半径。
表1a
Figure PCTCN2020083348-appb-000002
Figure PCTCN2020083348-appb-000003
其中，EFL为光学系统的有效焦距，FNO为光学系统的光圈数，FOV为光学系统的对角线方向的视场角，TTL为第一透镜的物侧面至光学系统的成像面于光轴上的距离。
表1b给出了可用于第一实施例中各非球面镜面S1、S2、S3、S4、S5、S6、S7、S8、S9、S10的高次项系数A4、A6、A8、A10、A12、A14、A16、A18和A20。
表1b
面序号 K A4 A6 A8 A10
S1 -1.832E+00 3.487E-02 -9.900E-03 3.075E-02 -5.322E-02
S2 1.700E+00 -1.524E-01 4.125E-01 -5.156E-01 3.029E-01
S3 -8.333E+00 -1.752E-01 4.285E-01 -3.103E-01 -3.492E-01
S4 -3.176E+00 -2.762E-02 1.335E-01 -3.617E-02 -1.321E-01
S5 1.700E+00 6.510E-03 -1.392E-01 7.190E-01 -2.324E+00
S6 -6.890E+01 6.766E-02 -1.346E-01 6.933E-01 -1.927E+00
S7 -3.247E+00 -4.579E-02 6.882E-02 -5.229E-02 1.757E-02
S8 -1.864E+00 2.071E-02 3.011E-02 -1.352E-01 1.542E-01
S9 -2.026E+00 2.419E-01 -2.527E-01 1.145E-02 1.493E-01
S10 -1.698E+00 1.738E-01 -1.950E-01 4.966E-02 6.214E-02
面序号 A12 A14 A16 A18 A20
S1 5.638E-02 -3.661E-02 1.412E-02 -2.960E-03 2.500E-04
S2 4.750E-03 -1.264E-01 8.044E-02 -2.201E-02 2.330E-03
S3 9.765E-01 -9.441E-01 4.765E-01 -1.247E-01 1.334E-02
S4 -3.469E-02 5.911E-01 -8.190E-01 4.669E-01 -9.936E-02
S5 4.460E+00 -5.272E+00 3.687E+00 -1.374E+00 2.041E-01
S6 3.211E+00 -3.315E+00 2.056E+00 -6.973E-01 9.884E-02
S7 -7.660E-03 1.484E-02 -1.152E-02 3.590E-03 -4.000E-04
S8 -1.096E-01 5.712E-02 -1.974E-02 3.790E-03 -3.000E-04
S9 -1.264E-01 5.343E-02 -1.308E-02 1.780E-03 -1.000E-04
S10 -6.310E-02 2.644E-02 -5.960E-03 7.100E-04 -4.000E-05
图3示出了第一实施例的光学系统的纵向球差曲线、像散曲线、畸变曲线。其中，纵向球差曲线表示不同波长的光线经由光学系统的各透镜后的会聚焦点偏离；像散曲线表示子午像面弯曲和弧矢像面弯曲；畸变曲线表示不同视场角对应的畸变大小值。根据图3可知，第一实施例所给出的光学系统能够实现良好的成像品质。
实施例二
如图4所示，直线11表示光轴，第一个透镜L1远离第二透镜L2的一侧为物侧12，第五透镜L5远离第四透镜L4的一侧为像侧13。本实施例提供的光学系统中，从物侧12到像侧13依次为光阑STO、第一个透镜L1、第二透镜L2、第三透镜L3、第四透镜L4、第五透镜L5、红外滤光元件IRCF。
第一透镜L1具有正屈折力，且为塑料材质，其物侧面S1于光轴处和于圆周处为凸面，其像侧面S2于光轴处和于圆周处为凸面，并皆为非球面。
第二透镜L2具有负屈折力，且为塑料材质，其物侧面S3于光轴处和于圆周处为凸面，其像侧面S4于光轴处和于圆周处为凹面，并皆为非球面。
第三透镜L3具有正屈折力，且为塑料材质，其物侧面S5于光轴处和于圆周处为凹面，其像侧面S6于光轴处为凸面，其像侧面S6于圆周处为凹面，并皆为非球面。
第四透镜L4具有正屈折力，且为塑料材质，其物侧面S7于光轴处和于圆周处为凹面，其像侧面S8于光轴处和于圆周处为凸面，且皆为非球面。
第五透镜L5具有负屈折力，且为塑料材质，其物侧面S9于光轴处为凹面，其物侧面S9于圆周处为凸面，其像侧面S10于光轴处和于圆周处为凸面，并皆为非球面。
光阑STO可以位于光学系统物侧与第五透镜之间，本实施例中的光阑STO设置在第一透镜L1远离第二透镜L2的一侧，用于控制进光量。
红外滤光元件IRCF设置在第五透镜L5之后，包括物侧面S11和像侧面S12，红外滤光元件IRCF用于过滤掉红外光线，使得射入成像面的光线为可见光，可见光的波长为380nm-780nm，红外滤光元件IRCF的材质为玻璃。
成像面S13为被摄物体的光通过光学系统后形成的像所在的面。
表2a示出了本实施例的光学系统的特性表格，其中，本实施例中的曲率半径为各透镜于光轴处的曲率半径。
表2a
Figure PCTCN2020083348-appb-000004
Figure PCTCN2020083348-appb-000005
其中，EFL为光学系统的有效焦距，FNO为光学系统的光圈数，FOV为光学系统的对角线方向的视场角，TTL为第一透镜的物侧面至光学系统的成像面于光轴上的距离。
表2b给出了可用于第二实施例中各非球面镜面S1、S2、S3、S4、S5、S6、S7、S8、S9、S10的高次项系数A4、A6、A8、A10、A12、A14、A16、A18和A20。
表2b
面序号 K A4 A6 A8 A10
S1 -1.757E+00 3.289E-02 -1.390E-03 5.200E-04 9.950E-03
S2 4.958E+01 -8.830E-02 1.962E-01 -2.367E-01 1.942E-01
S3 -2.094E+01 -1.338E-01 3.086E-01 -3.060E-01 1.515E-01
S4 -2.631E+00 -6.285E-02 2.463E-01 -2.784E-01 3.201E-01
S5 -2.424E+01 -2.500E-01 1.509E+00 -4.157E+00 7.618E+00
S6 -2.464E+01 -6.927E-02 1.092E+00 -2.640E+00 4.017E+00
S7 -1.556E+01 9.229E-02 -3.215E-01 6.382E-01 -9.447E-01
S8 -4.220E+00 4.821E-01 -1.424E+00 2.144E+00 -2.091E+00
S9 -1.889E+00 6.154E-01 -1.822E+00 2.723E+00 -2.458E+00
S10 -6.100E-01 3.557E-02 -9.998E-02 6.779E-02 3.331E-02
面序号 A12 A14 A16 A18 A20
S1 -1.949E-02 1.862E-02 -9.970E-03 2.850E-03 -3.400E-04
S2 -1.163E-01 5.004E-02 -1.443E-02 2.450E-03 -1.900E-04
S3 -3.769E-02 2.209E-02 -2.281E-02 1.016E-02 -1.570E-03
S4 -4.175E-01 3.815E-01 -1.299E-01 -3.522E-02 2.604E-02
S5 -9.462E+00 7.743E+00 -4.006E+00 1.197E+00 -1.590E-01
S6 -3.935E+00 2.392E+00 -8.588E-01 1.687E-01 -1.504E-02
S7 9.440E-01 -5.830E-01 2.094E-01 -3.964E-02 3.020E-03
S8 1.358E+00 -5.723E-01 1.486E-01 -2.141E-02 1.300E-03
S9 1.428E+00 -5.373E-01 1.268E-01 -1.709E-02 1.000E-03
S10 -7.047E-02 4.176E-02 -1.246E-02 1.910E-03 -1.200E-04
图5示出了第二实施例的光学系统的纵向球差曲线、像散曲线、畸变曲线。其中，纵向球差曲线表示不同波长的光线经由光学系统的各透镜后的会聚焦点偏离；像散曲线表示子午像面弯曲和弧矢像面弯曲；畸变曲线表示不同视场角对应的畸变大小值。根据图5可知，第二实施例所给出的光学系统能够实现良好的成像品质。
实施例三
如图6所示，直线11表示光轴，第一个透镜L1远离第二透镜L2的一侧为物侧12，第五透镜L5远离第四透镜L4的一侧为像侧13。本实施例提供的光学系统中，从物侧12到像侧13依次为光阑STO、第一个透镜L1、第二透镜L2、第三透镜L3、第四透镜L4、第五透镜L5、红外滤光元件IRCF。
第一透镜L1具有正屈折力，且为塑料材质，其物侧面S1于光轴处和于圆周处为凸面，其像侧面S2于光轴处和于圆周处为凸面，并皆为非球面。
第二透镜L2具有负屈折力，且为塑料材质，其物侧面S3于光轴处和于圆周处为凸面，其于光轴处和于圆周处的像侧面S4为凹面，并皆为非球面。
第三透镜L3具有负屈折力，且为塑料材质，其物侧面S5于光轴处和于圆周处为凹面，其像侧面S6于光轴处和于圆周处为凹面，并皆为非球面。
第四透镜L4具有正屈折力，且为塑料材质，其物侧面S7于光轴处为凸面，其物侧面S7于圆周处为凹面，其像侧面S8于光轴处和于圆周处为凸面，且皆为非球面。
第五透镜L5具有正屈折力，且为塑料材质，其物侧面S9于光轴处为凹面，其物侧面S9于圆周处为凸面，其像侧面S10于光轴处和于圆周处为凸面，并皆为非球面。
光阑STO可以位于光学系统物侧与第五透镜之间，本实施例中的光阑STO设置在第一透镜L1远离第二透镜L2的一侧，用于控制进光量。
红外滤光元件IRCF设置在第五透镜L5之后，包括物侧面S11和像侧面S12，红外滤光元件IRCF用于过滤掉红外光线，使得射入成像面的光线为可见光，可见光的波长为380nm-780nm，红外滤光元件IRCF的材质为玻璃。
成像面S13为被摄物体的光通过光学系统后形成的像所在的面。
表3a示出了本实施例的光学系统的特性表格，其中，本实施例中的曲率半径为各透镜于光轴处的曲率半径。
表3a
Figure PCTCN2020083348-appb-000006
其中，EFL为光学系统的有效焦距，FNO为光学系统的光圈数，FOV为光学系统的对角线方向的视场角，TTL为第一透镜的物侧面至光学系统的成像面于光轴上的距离。
表3b给出了可用于第三实施例中各非球面镜面S1、S2、S3、S4、S5、S6、S7、S8、S9、S10的高次项系数A4、A6、A8、A10、A12、A14、A16、A18和A20。
表3b
面序号 K A4 A6 A8 A10
S1 -1.698E+00 3.391E-02 -5.500E-04 5.260E-03 -6.630E-03
S2 -9.703E+01 -9.938E-02 2.625E-01 -4.028E-01 4.254E-01
S3 -2.448E+01 -1.503E-01 4.271E-01 -6.716E-01 7.275E-01
S4 -2.977E+00 -4.358E-02 2.542E-01 -5.028E-01 9.245E-01
S5 3.488E+01 -6.920E-02 3.791E-02 2.522E-01 -1.291E+00
S6 -2.466E+01 3.580E-02 -1.971E-02 1.832E-01 -4.926E-01
S7 -9.500E+01 -3.794E-02 -1.725E-01 4.420E-01 -7.850E-01
S8 5.550E+01 -1.017E-02 -1.946E-01 3.857E-01 -5.255E-01
S9 -3.770E-01 9.687E-02 -2.298E-01 3.387E-01 -3.138E-01
S10 -1.802E-01 6.085E-02 -1.541E-01 1.824E-01 -1.311E-01
面序号 A12 A14 A16 A18 A20
S1 4.680E-03 -1.390E-03 -2.800E-04 2.900E-04 -6.000E-05
S2 -3.160E-01 1.616E-01 -5.406E-02 1.061E-02 -9.300E-04
S3 -5.529E-01 2.949E-01 -1.063E-01 2.343E-02 -2.370E-03
S4 -1.458E+00 1.720E+00 -1.312E+00 5.635E-01 -1.027E-01
S5 3.045E+00 -4.286E+00 3.581E+00 -1.630E+00 3.089E-01
S6 7.635E-01 -7.464E-01 4.504E-01 -1.529E-01 2.216E-02
S7 9.121E-01 -6.942E-01 3.393E-01 -9.532E-02 1.150E-02
S8 4.673E-01 -2.690E-01 9.751E-02 -1.996E-02 1.730E-03
S9 1.796E-01 -6.250E-02 1.285E-02 -1.430E-03 7.000E-05
S10 5.862E-02 -1.626E-02 2.670E-03 -2.200E-04 1.000E-05
图7示出了第三实施例的光学系统的纵向球差曲线、像散曲线、畸变曲线。其中，纵向球差曲线表示不同波长的光线经由光学系统的各透镜后的会聚焦点偏离；像散曲线表示子午像面弯曲和弧矢像面弯曲；畸变曲线表示不同视场角对应的畸变大小值。根据图7可知，第三实施例所给出的光学系统能够实现良好的成像品质。
实施例四
如图8所示，直线11表示光轴，第一个透镜L1远离第二透镜L2的一侧为物侧12，第五透镜L5远离第四透镜L4的一侧为像侧13。本实施例提供的光学系统中，从物侧12到像侧13依次为光阑STO、第一个透镜L1、第二透镜L2、第三透镜L3、第四透镜L4、第五透镜L5、红外滤光元件IRCF。
第一透镜L1具有正屈折力，且为塑料材质，其物侧面S1于光轴处和于圆周处为凸面，其像侧面S2于光轴处为凹面，其像侧面S2于圆周处为凸面，并皆为非球面。
第二透镜L2具有正屈折力，且为塑料材质，其物侧面S3于光轴处和于圆周处为凸面，其像侧面S4于光轴处为凸面，其像侧面S4于圆周处为凹面，并皆为非球面。
第三透镜L3具有负屈折力，且为塑料材质，其物侧面S5于光轴处和于圆周处为凹面，其像侧面S6于光轴处和于圆周处为凹面，并皆为非球面。
第四透镜L4具有正屈折力，且为塑料材质，其物侧面S7于光轴处和于圆周处为凹面，其像侧面S8于光轴处和于圆周处为凸面，且皆为非球面。
第五透镜L5具有负屈折力，且为塑料材质，其物侧面S9于光轴处和于圆周处为凹面，其像侧面S10于光轴处和于圆周处为凸面，并皆为非球面。
光阑STO可以位于光学系统物侧与第五透镜之间，本实施例中的光阑STO设置在第一透镜L1远离第二透镜L2的一侧，用于控制进光量。
红外滤光元件IRCF设置在第五透镜L5之后，包括物侧面S11和像侧面S12，红外滤光元件IRCF用于过滤掉红外光线，使得射入成像面的光线为可见光，可见光的波长为380nm-780nm，红外滤光元件IRCF的材质为玻璃。
成像面S13为被摄物体的光通过光学系统后形成的像所在的面。
表4a示出了本实施例的光学系统的特性表格，其中，本实施例中的曲率半径为各透镜于光轴处的曲率半径。
表4a
Figure PCTCN2020083348-appb-000007
其中，EFL为光学系统的有效焦距，FNO为光学系统的光圈数，FOV为光学系统的对角线方向的视场角，TTL为第一透镜的物侧面至光学系统的成像面于光轴上的距离。
表4b给出了可用于第四实施例中各非球面镜面S1、S2、S3、S4、S5、S6、S7、S8、S9、S10的高次项系数A4、A6、A8、A10、A12、A14、A16、A18和A20。
表4b
面序号 K A4 A6 A8 A10
S1 -1.702E+00 2.781E-02 -1.260E-03 4.796E-02 -1.119E-01
S2 -8.412E+01 -1.168E-01 8.764E-02 3.123E-01 -8.534E-01
S3 -9.900E+01 -2.469E-01 5.368E-01 -3.684E-01 -2.338E-01
S4 3.660E+01 -2.261E-02 2.823E-01 -3.144E-01 1.658E-01
S5 -9.085E+01 1.717E-01 -5.063E-02 -4.839E-01 1.888E+00
S6 3.757E+01 2.226E-01 7.084E-02 -1.097E+00 3.820E+00
S7 1.010E+00 2.791E-02 -1.437E-02 -1.549E-01 3.920E-01
S8 -2.561E+00 8.999E-02 -1.908E-01 1.572E-01 -6.744E-02
S9 -1.339E+00 2.359E-01 -4.815E-01 4.882E-01 -2.548E-01
S10 4.264E-01 9.684E-02 -1.981E-01 1.425E-01 -1.206E-02
面序号 A12 A14 A16 A18 A20
S1 1.395E-01 -1.031E-01 4.497E-02 -1.068E-02 1.050E-03
S2 9.842E-01 -6.416E-01 2.456E-01 -5.171E-02 4.650E-03
S3 6.724E-01 -5.872E-01 2.685E-01 -6.485E-02 6.570E-03
S4 -7.549E-02 1.716E-01 -2.154E-01 1.137E-01 -2.192E-02
S5 -4.100E+00 5.311E+00 -4.038E+00 1.656E+00 -2.822E-01
S6 -8.027E+00 1.036E+01 -7.982E+00 3.364E+00 -5.961E-01
S7 -4.793E-01 3.291E-01 -1.271E-01 2.573E-02 -2.130E-03
S8 1.408E-02 -8.550E-03 8.120E-03 -2.880E-03 3.300E-04
S9 4.089E-02 2.696E-02 -1.689E-02 3.750E-03 -3.100E-04
S10 -5.044E-02 3.765E-02 -1.273E-02 2.160E-03 -1.500E-04
图9示出了第四实施例的光学系统的纵向球差曲线、像散曲线、畸变曲线。其中，纵向球差曲线表示不同波长的光线经由光学系统的各透镜后的会聚焦点偏离；像散曲线表示子午像面弯曲和弧矢像面弯曲；畸变曲线表示不同视场角对应的畸变大小值。根据图9可知，第四实施例所给出的光学系统能够实现良好的成像品质。
实施例五
如图10所示，直线11表示光轴，第一个透镜L1远离第二透镜L2的一侧为物侧12，第五透镜L5远离第四透镜L4的一侧为像侧13。本实施例提供的光学系统中，从物侧12到像侧13依次为光阑STO、第一个透镜L1、第二透镜L2、第三透镜L3、第四透镜L4、第五透镜L5、红外滤光元件IRCF。
第一透镜L1具有正屈折力，且为塑料材质，其物侧面S1于光轴处和于圆周处为凸面，其像侧面S2于光轴处和于圆周处为凸面，并皆为非球面。
第二透镜L2具有负屈折力，且为塑料材质，其物侧面S3于光轴处为凹面，其物侧面S3于圆周处为凸面，其像侧面S4于光轴处和于圆周处为凹面，并皆为非球面。
第三透镜L3具有负屈折力，且为塑料材质，其物侧面S5于光轴处和于圆周处为凹面，其像侧面S6于光轴处和于圆周处为凹面，并皆为非球面。
第四透镜L4具有正屈折力，且为塑料材质，其物侧面S7于光轴处为凸面，其物侧面S7于圆周处为凹面，其像侧面S8于光轴处和于圆周处为凸面，且皆为非球面。
第五透镜L5具有负屈折力，且为塑料材质，其物侧面S9于光轴处和于圆周处为凹面，其像侧面S10于光轴处和于圆周处为凸面，并皆为非球面。
光阑STO可以位于光学系统物侧与第五透镜之间，本实施例中的光阑STO设置在第一透镜L1远离第二透镜L2的一侧，用于控制进光量。
红外滤光元件IRCF设置在第五透镜L5之后，包括物侧面S11和像侧面S12，红外滤光元件IRCF用于过滤掉红外光线，使得射入成像面的光线为可见光，可见光的波长为 380nm-780nm，红外滤光元件IRCF的材质为玻璃。
成像面S13为被摄物体的光通过光学系统后形成的像所在的面。
表5a示出了本实施例的光学系统的特性表格，其中，本实施例中的曲率半径为各透镜于光轴处的曲率半径。
表5a
Figure PCTCN2020083348-appb-000008
其中，EFL为光学系统的有效焦距，FNO为光学系统的光圈数，FOV为光学系统的对角线方向的视场角，TTL为第一透镜的物侧面至光学系统的成像面于光轴上的距离。
表5b给出了可用于第五实施例中各非球面镜面S1、S2、S3、S4、S5、S6、S7、S8、S9、S10的高次项系数A4、A6、A8、A10、A12、A14、A16、A18和A20。
表5b
面序号 K A4 A6 A8 A10
S1 -1.808E+00 3.150E-02 -9.400E-04 5.050E-03 -8.420E-03
S2 -7.787E+01 -5.395E-02 1.062E-01 -1.453E-01 1.612E-01
S3 -8.608E+01 -9.688E-02 2.035E-01 -2.729E-01 3.253E-01
S4 -5.455E+00 -5.019E-02 1.654E-01 -2.699E-01 6.022E-01
S5 -2.048E+01 2.534E-02 -2.270E-03 -1.132E-01 3.384E-01
S6 -5.875E+01 7.911E-02 -2.146E-02 -3.933E-02 1.125E-01
S7 1.751E+01 1.194E-02 -1.072E-02 -4.892E-02 8.226E-02
S8 -2.407E+00 7.588E-02 -4.397E-02 -8.105E-02 1.314E-01
S9 -6.536E-01 2.007E-01 -2.252E-01 9.016E-02 -1.925E-02
S10 8.785E+00 1.215E-01 -1.456E-01 4.735E-02 1.922E-02
面序号 A12 A14 A16 A18 A20
S1 9.310E-03 -6.470E-03 2.720E-03 -6.400E-04 6.000E-05
S2 -1.412E-01 9.046E-02 -3.878E-02 9.810E-03 -1.100E-03
S3 -3.276E-01 2.589E-01 -1.423E-01 4.687E-02 -6.870E-03
S4 -1.190E+00 1.732E+00 -1.597E+00 8.293E-01 -1.822E-01
S5 -5.631E-01 5.829E-01 -3.562E-01 1.151E-01 -1.509E-02
S6 -1.440E-01 1.028E-01 -3.639E-02 1.110E-03 1.820E-03
S7 -7.207E-02 3.966E-02 -1.405E-02 2.910E-03 -2.600E-04
S8 -9.180E-02 3.856E-02 -1.064E-02 1.820E-03 -1.400E-04
S9 2.997E-02 -2.848E-02 1.131E-02 -2.040E-03 1.400E-04
S10 -2.174E-02 8.210E-03 -1.670E-03 1.900E-04 -1.000E-05
图11示出了第五实施例的光学系统的纵向球差曲线、像散曲线、畸变曲线。其中，纵向球差曲线表示不同波长的光线经由光学系统的各透镜后的会聚焦点偏离；像散曲线表示子午像面弯曲和弧矢像面弯曲；畸变曲线表示不同视场角对应的畸变大小值。根据图11可知，第五实施例所给出的光学系统能够实现良好的成像品质。
实施例六
如图12所示，直线11表示光轴，第一个透镜L1远离第二透镜L2的一侧为物侧12，第五透镜L5远离第四透镜L4的一侧为像侧13。本实施例提供的光学系统中，从物侧12到像侧13依次为光阑STO、第一个透镜L1、第二透镜L2、第三透镜L3、第四透镜L4、第五透镜L5、红外滤光元件IRCF。
第一透镜L1具有正屈折力，且为塑料材质，其物侧面S1于光轴处和于圆周处为凸面，其像侧面S2于光轴处和于圆周处为凸面，并皆为非球面。
第二透镜L2具有负屈折力，且为塑料材质，其物侧面S3于光轴处和于圆周处为凸面，其像侧面S4于光轴处和于圆周处为凹面，并皆为非球面。
第三透镜L3具有负屈折力，且为塑料材质，其物侧面S5于光轴处和于圆周处为凹面，其像侧面S6于光轴处为凸面，其像侧面S6于圆周处为凹面，并皆为非球面。
第四透镜L4具有正屈折力，且为塑料材质，其物侧面S7于光轴处和于圆周处为凹面，其像侧面S8于光轴处和于圆周处为凸面，且皆为非球面。
第五透镜L5具有负屈折力，且为塑料材质，其物侧面S9于光轴处和于圆周处为凹面，其像侧面S10于光轴处和于圆周处为凸面，并皆为非球面。
光阑STO可以位于光学系统物侧与第五透镜之间，本实施例中的光阑STO设置在第一透镜L1远离第二透镜L2的一侧，用于控制进光量。
红外滤光元件IRCF设置在第五透镜L5之后，包括物侧面S11和像侧面S12，红外滤光元件IRCF用于过滤掉红外光线，使得射入成像面的光线为可见光，可见光的波长为380nm-780nm，红外滤光元件IRCF的材质为玻璃。
成像面S13为被摄物体的光通过光学系统后形成的像所在的面。
表6a示出了本实施例的光学系统的特性表格，其中，本实施例中的曲率半径为各透镜于光轴处的曲率半径。
表6a
Figure PCTCN2020083348-appb-000009
其中，EFL为光学系统的有效焦距，FNO为光学系统的光圈数，FOV为光学系统的对角线方向的视场角，TTL为第一透镜的物侧面至光学系统的成像面于光轴上的距离。
表6b给出了可用于第六实施例中各非球面镜面S1、S2、S3、S4、S5、S6、S7、S8、S9、S10的高次项系数A4、A6、A8、A10、A12、A14、A16、A18和A20。
表6b
面序号 K A4 A6 A8 A10
S1 -1.836E+00 3.403E-02 -4.620E-03 1.429E-02 -2.461E-02
S2 -9.900E+01 -1.033E-01 2.171E-01 -1.575E-01 -8.539E-02
S3 -1.472E+01 -1.602E-01 3.275E-01 -7.152E-02 -6.963E-01
S4 -3.497E+00 -5.053E-02 1.691E-01 7.280E-03 -3.005E-01
S5 -2.347E+00 -2.593E-02 3.578E-02 6.290E-03 -2.847E-01
S6 -9.900E+01 2.564E-02 4.207E-02 1.071E-02 -1.457E-01
S7 -2.986E-01 -2.067E-02 4.781E-02 -1.185E-01 2.030E-01
S8 -1.913E+00 3.910E-02 6.690E-03 -2.199E-01 3.529E-01
S9 -2.099E+00 2.205E-01 -1.752E-01 -1.833E-01 4.162E-01
S10 -1.624E+00 1.470E-01 -1.433E-01 2.892E-02 3.789E-02
面序号 A12 A14 A16 A18 A20
S1 2.814E-02 -2.067E-02 9.260E-03 -2.300E-03 2.400E-04
S2 2.858E-01 -2.752E-01 1.394E-01 -3.746E-02 4.230E-03
S3 1.386E+00 -1.339E+00 7.339E-01 -2.187E-01 2.763E-02
S4 3.859E-02 9.784E-01 -1.562E+00 1.005E+00 -2.427E-01
S5 8.831E-01 -1.465E+00 1.311E+00 -5.899E-01 1.039E-01
S6 3.336E-01 -4.590E-01 3.544E-01 -1.389E-01 2.144E-02
S7 -2.174E-01 1.472E-01 -6.125E-02 1.416E-02 -1.380E-03
S8 -2.799E-01 1.314E-01 -3.727E-02 5.940E-03 -4.100E-04
S9 -3.269E-01 1.400E-01 -3.467E-02 4.670E-03 -2.700E-04
S10 -3.305E-02 1.227E-02 -2.480E-03 2.700E-04 -1.000E-05
图13示出了第六实施例的光学系统的纵向球差曲线、像散曲线、畸变曲线。其中，纵向球差曲线表示不同波长的光线经由光学系统的各透镜后的会聚焦点偏离；像散曲线表示子午像面弯曲和弧矢像面弯曲；畸变曲线表示不同视场角对应的畸变大小值。根据图13可知，第六实施例所给出的光学系统能够实现良好的成像品质。
实施例七
如图14所示，直线11表示光轴，第一个透镜L1远离第二透镜L2的一侧为物侧12，第五透镜L5远离第四透镜L4的一侧为像侧13。本实施例提供的光学系统中，从物侧12到像侧13依次为光阑STO、第一个透镜L1、第二透镜L2、第三透镜L3、第四透镜L4、第五透镜L5、红外滤光元件IRCF。
第一透镜L1具有正屈折力，且为塑料材质，其物侧面S1于光轴处和于圆周处为凸面，其像侧面S2于光轴处和于圆周处为凸面，并皆为非球面。
第二透镜L2具有负屈折力，且为塑料材质，其物侧面S3于光轴处和于圆周处为凸面，其像侧面S4于光轴处和于圆周处为凹面，并皆为非球面。
第三透镜L3具有负屈折力，且为塑料材质，其物侧面S5于光轴处和于圆周处为凹面，其像侧面S6于光轴处为凸面，其像侧面S6于圆周处为凹面，并皆为非球面。
第四透镜L4具有正屈折力，且为塑料材质，其物侧面S7于光轴处和于圆周处为凹面，其像侧面S8于光轴处和于圆周处为凸面，且皆为非球面。
第五透镜L5具有负屈折力，且为塑料材质，其物侧面S9于光轴处和于圆周处为凹面，其像侧面S10于光轴处和于圆周处为凸面，并皆为非球面。
光阑STO可以位于光学系统物侧与第五透镜之间，本实施例中的光阑STO设置在第一透镜L1远离第二透镜L2的一侧，用于控制进光量。
红外滤光元件IRCF设置在第五透镜L5之后，包括物侧面S11和像侧面S12，红外滤光元件IRCF用于过滤掉红外光线，使得射入成像面的光线为可见光，可见光的波长为380nm-780nm，红外滤光元件IRCF的材质为玻璃。
成像面S13为被摄物体的光通过光学系统后形成的像所在的面。
表7a示出了本实施例的光学系统的特性表格，其中，本实施例中的曲率半径为各透镜于光轴处的曲率半径。
表7a
Figure PCTCN2020083348-appb-000010
其中，EFL为光学系统的有效焦距，FNO为光学系统的光圈数，FOV为光学系统的对角线方向的视场角，TTL为第一透镜的物侧面至光学系统的成像面于光轴上的距离。
表7b给出了可用于第七实施例中各非球面镜面S1、S2、S3、S4、S5、S6、S7、S8、S9、S10的高次项系数A4、A6、A8、A10、A12、A14、A16、A18和A20。
表7b
面序号 K A4 A6 A8 A10
S1 -1.819E+00 3.418E-02 -2.440E-03 6.200E-03 -6.720E-03
S2 -9.900E+01 -8.565E-02 1.830E-01 -1.790E-01 6.950E-02
S3 -2.139E+01 -1.487E-01 3.027E-01 -1.649E-01 -3.144E-01
S4 -3.599E+00 -5.408E-02 1.629E-01 4.510E-02 -5.885E-01
S5 -3.817E+00 -5.298E-02 1.400E-01 -3.375E-01 8.252E-01
S6 -5.683E+01 -2.245E-02 1.149E-01 -1.256E-01 1.604E-01
S7 7.826E+00 -5.200E-03 -3.994E-02 2.144E-01 -5.216E-01
S8 -2.370E+00 3.207E-02 -5.103E-02 1.535E-02 4.201E-02
S9 -2.424E+00 2.058E-01 -2.445E-01 1.466E-02 2.313E-01
S10 -2.433E+00 1.869E-01 -1.983E-01 4.555E-02 6.310E-02
面序号 A12 A14 A16 A18 A20
S1 4.100E-03 -9.200E-04 -3.700E-04 2.600E-04 -5.000E-05
S2 4.174E-02 -7.078E-02 3.959E-02 -1.063E-02 1.160E-03
S3 8.044E-01 -8.574E-01 5.071E-01 -1.619E-01 2.182E-02
S4 1.117E+00 -9.788E-01 3.236E-01 7.505E-02 -5.805E-02
S5 -1.602E+00 1.983E+00 -1.440E+00 5.590E-01 -8.966E-02
S6 -3.163E-01 4.124E-01 -2.827E-01 9.570E-02 -1.273E-02
S7 7.116E-01 -5.981E-01 3.014E-01 -8.205E-02 9.210E-03
S8 -6.592E-02 4.560E-02 -1.782E-02 3.890E-03 -3.700E-04
S9 -2.449E-01 1.241E-01 -3.482E-02 5.210E-03 -3.300E-04
S10 -6.113E-02 2.530E-02 -5.730E-03 7.000E-04 -4.000E-05
图15示出了第七实施例的光学系统的纵向球差曲线、像散曲线、畸变曲线。其中，纵向球差曲线表示不同波长的光线经由光学系统的各透镜后的会聚焦点偏离；像散曲线表示子午像面弯曲和弧矢像面弯曲；畸变曲线表示不同视场角对应的畸变大小值。根据图15可知，第七实施例所给出的光学系统能够实现良好的成像品质。
表8为第一实施例至第七实施例的光学系统的ftgtl3/ftltl3、FNO*L1SD/tanFOV、L1SD/Imgh、EFL/f1、airL2/TTL、(|R9|-|R10|)/(|R9|+|R10|)、DL/TTL、FNO/TTL、TTL/EFL、EFL/Imgh的值。
表8
  ftgtl3/ftltl3 FNO*L1SD/tanFOV L1SD/Imgh EFL/f1 airL2/TTL
第一实施例 0.52 12.84 0.75 2.29 0.24
第二实施例 0.58 12.91 0.75 2.27 0.32
第三实施例 0.47 12.86 0.75 2.43 0.25
第四实施例 0.55 12.68 0.73 1.47 0.24
第五实施例 0.69 11.14 0.70 2.37 0.07
第六实施例 0.61 11.40 0.70 2.21 0.23
第七实施例 0.65 9.90 0.66 2.08 0.21
  (|R9|-|R10|)/(|R9|+|R10|) DL/TTL FNO/TTL TTL/EFL EFL/Imgh
第一实施例 -0.28 0.47 0.38 0.86 1.83
第二实施例 -0.43 0.48 0.38 0.86 1.83
第三实施例 0.05 0.48 0.38 0.86 1.83
第四实施例 -0.29 0.46 0.39 0.86 1.83
第五实施例 -0.53 0.44 0.37 0.95 1.70
第六实施例 -0.40 0.45 0.39 0.90 1.74
第七实施例 -0.36 0.42 0.39 0.96 1.63
由表8可见，各实施例均能满足：0.25<ftgtl3/ftltl3<0.8、7mm<FNO*L1SD/tanFOV<15mm、0.5<L1SD/Imgh<0.8、1<EFL/f1<3、0.05<airL2/TTL<0.35、-1<(|R9|-|R10|)/(|R9|+|R10|)<0.1、0.3<DL/TTL<0.6、FNO/TTL<0.5mm -1、0.8<TTL/EFL<1、1.5<EFL/Imgh<2。
以上所述是本申请的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本申请原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也视为本申请的保护范围。

Claims (12)

  1. 一种光学系统，其特征在于，包括从物侧至像侧依次排布的多个透镜，所述多个透镜包括：
    第一透镜，具有正屈折力，所述第一透镜的物侧面于光轴处为凸面；
    第二透镜，具有屈折力；
    第三透镜，具有屈折力，所述第三透镜的物侧面于光轴处为凹面；
    第四透镜，具有正屈折力，所述第四透镜的像侧面于光轴处为凸面；
    第五透镜，具有屈折力，所述第五透镜的物侧面于光轴处为凹面，所述第五透镜的像侧面于光轴处为凸面；
    所述光学系统满足以下条件式：
    0.25<ftgtl3/ftltl3<0.8，
    其中，ftgtl3为所述第三透镜的物侧面至所述第三透镜的像侧面于平行于光轴方向的最短的距离，ftltl3为所述第三透镜的物侧面至所述第三透镜的像侧面于平行于光轴方向的最长的距离。
  2. 根据权利要求1所述的光学系统，其特征在于，所述光学系统满足条件式：
    7mm<FNO*L1SD/tanFOV<15mm，
    其中，FNO为所述光学系统的光圈数，L1SD为所述第一透镜的孔径，tanFOV为所述光学系统的最大视场角的正切值。
  3. 根据权利要求1所述的光学系统，其特征在于，所述光学系统满足条件式：
    0.5<L1SD/Imgh<0.8，
    其中，L1SD为所述第一透镜的孔径，Imgh为所述光学系统于成像面上有效像素区域对角线长度的一半。
  4. 根据权利要求1所述的光学系统，其特征在于，所述光学系统满足条件式：
    1<EFL/f1<3，
    其中，EFL为所述光学系统的有效焦距，f1为所述第一透镜的焦距。
  5. 根据权利要求1所述的光学系统，其特征在于，所述光学系统满足条件式：
    0.05<airL2/TTL<0.35，
    其中，airL2为所述第二透镜的像侧面至所述第三透镜的物侧面于光轴上的距离，TTL为所述第一透镜的物侧面至所述光学系统的成像面于光轴上的距离。
  6. 根据权利要求1所述的光学系统，其特征在于，所述光学系统满足条件式：
    -1<(|R9|-|R10|)/(|R9|+|R10|)<0.1；
    其中，R9为所述第五透镜的物侧面于光轴处的曲率半径，R10为所述第五透镜的像侧面于光轴处的曲率半径。
  7. 根据权利要求1所述的光学系统，其特征在于，所述光学系统还包括光阑，所述光学系统满足条件式：
    0.3<DL/TTL<0.6，
    其中，DL为所述光学系统的所述光阑的孔径，TTL为所述第一透镜的物侧面至所述光学 系统的成像面于光轴上的距离。
  8. 根据权利要求1所述的光学系统，其特征在于，所述光学系统满足条件式：
    FNO/TTL<0.5mm -1，
    其中，FNO为所述光学系统的光圈数，TTL为所述第一透镜的物侧面至所述光学系统的成像面于光轴上的距离。
  9. 根据权利要求1所述的光学系统，其特征在于，所述光学系统满足条件式：
    0.8<TTL/EFL<1，
    其中，TTL为所述第一透镜的物侧面至所述光学系统的成像面于光轴上的距离，EFL为所述光学系统的有效焦距。
  10. 根据权利要求1所述的光学系统，其特征在于，所述光学系统满足条件式：
    1.5<EFL/Imgh<2，
    其中，EFL为所述光学系统的有效焦距，Imgh为所述光学系统于成像面上有效像素区域对角线长度的一半。
  11. 一种镜头模组，其特征在于，包括感光元件和如权利要求1至10任一项所述的光学系统，所述感光元件位于所述光学系统的像侧。
  12. 一种终端设备，其特征在于，包括如权利要求11所述的镜头模组。
PCT/CN2020/083348 2020-04-03 2020-04-03 光学系统、镜头模组及终端设备 WO2021196224A1 (zh)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI828601B (zh) * 2023-07-12 2024-01-01 新鉅科技股份有限公司 成像透鏡組及攝像模組

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115128767B (zh) * 2022-07-28 2023-08-08 浙江舜宇光学有限公司 光学成像镜头

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130301147A1 (en) * 2012-05-14 2013-11-14 Konica Minolta, Inc. Imaging lens system
CN106814436A (zh) * 2015-11-27 2017-06-09 大立光电股份有限公司 摄影用光学镜头组、取像装置及电子装置
CN108152936A (zh) * 2018-03-15 2018-06-12 欧菲影像技术（广州）有限公司 镜头和成像装置
CN109683287A (zh) * 2019-02-13 2019-04-26 浙江舜宇光学有限公司 光学成像镜头
CN110873948A (zh) * 2018-08-31 2020-03-10 南昌欧菲精密光学制品有限公司 取像镜头、取像模组和电子装置
CN110927939A (zh) * 2018-09-20 2020-03-27 南昌欧菲精密光学制品有限公司 光学成像系统、取像模组和电子装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6167348B2 (ja) * 2013-09-11 2017-07-26 カンタツ株式会社 撮像レンズ
JP2015102673A (ja) * 2013-11-25 2015-06-04 富士フイルム株式会社 撮像レンズおよび撮像レンズを備えた撮像装置
KR102150717B1 (ko) * 2014-01-27 2020-09-01 엘지이노텍 주식회사 촬상 렌즈
KR102009430B1 (ko) * 2014-05-26 2019-08-09 삼성전기주식회사 촬상 광학계

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130301147A1 (en) * 2012-05-14 2013-11-14 Konica Minolta, Inc. Imaging lens system
CN106814436A (zh) * 2015-11-27 2017-06-09 大立光电股份有限公司 摄影用光学镜头组、取像装置及电子装置
CN108152936A (zh) * 2018-03-15 2018-06-12 欧菲影像技术（广州）有限公司 镜头和成像装置
CN110873948A (zh) * 2018-08-31 2020-03-10 南昌欧菲精密光学制品有限公司 取像镜头、取像模组和电子装置
CN110927939A (zh) * 2018-09-20 2020-03-27 南昌欧菲精密光学制品有限公司 光学成像系统、取像模组和电子装置
CN109683287A (zh) * 2019-02-13 2019-04-26 浙江舜宇光学有限公司 光学成像镜头

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI828601B (zh) * 2023-07-12 2024-01-01 新鉅科技股份有限公司 成像透鏡組及攝像模組

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