WO2021179308A1 - 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

Info

Publication number
WO2021179308A1
WO2021179308A1 PCT/CN2020/079309 CN2020079309W WO2021179308A1 WO 2021179308 A1 WO2021179308 A1 WO 2021179308A1 CN 2020079309 W CN2020079309 W CN 2020079309W WO 2021179308 A1 WO2021179308 A1 WO 2021179308A1
Authority
WO
WIPO (PCT)
Prior art keywords
lens
optical system
object side
optical axis
optical
Prior art date
Application number
PCT/CN2020/079309
Other languages
English (en)
French (fr)
Inventor
谭怡翔
党绪文
谢晗
刘秀
Original Assignee
江西晶超光学有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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 US17/437,385 priority Critical patent/US20220299737A1/en
Priority to PCT/CN2020/079309 priority patent/WO2021179308A1/zh
Publication of WO2021179308A1 publication Critical patent/WO2021179308A1/zh

Links

Images

Classifications

    • 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
    • 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
    • G02B13/0055—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element
    • G02B13/006—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element at least one element being a compound optical element, e.g. cemented elements
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/0025—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for optical correction, e.g. distorsion, aberration

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.
  • plastic lenses have been used for imaging lenses, which improves the molding efficiency and facilitates mass production of lenses.
  • the number of lenses is increasing. It is also difficult to control the off-axis and offset during the lens assembly process by adopting the negative pressure adsorption type assembly method, which makes it difficult to improve the yield rate.
  • the embodiments of the present application provide an optical system, a lens module, and a terminal device.
  • the optical system is easy to assemble, is beneficial to improve the assembly yield, and has the characteristics of lower assembly sensitivity.
  • an embodiment of the present application provides an optical system, a plurality of lenses arranged in sequence from the object side to the image side along the optical axis direction, the plurality of lenses including a first lens, having a positive refractive power, so 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 fourth lens has positive refractive power, and the object side of the fourth lens is on the optical axis The image side surface of the fourth lens is convex at the optical axis; the fifth lens has negative refractive power, the image side surface of the second lens is cemented with the object side surface of the third lens, and the optical
  • the system satisfies the following conditional formula: 1.0mm -1 ⁇ (n2+n3)/f ⁇ 1.4mm -1 ; n2 is the refractive index of the second lens, n3 is the refractive index of the third lens, and f is the The effective focal length of the optical system.
  • This application restricts the surface shape and refractive power of the first lens to the fifth lens and the ratio range of (n2+n3)/f in the optical system, and sets the second lens and the third lens to be cemented to form a cemented lens.
  • the operation of coaxial alignment of the second lens and the third lens is avoided, which is beneficial to improve the assembly yield of the optical system, and enables the optical system to have a lower assembly sensitivity.
  • the chromatic aberration can be minimized by limiting the range of (n2+n3)/f and reasonably configuring the refractive power of the second lens and the third lens
  • the difference with the ball improves the image quality.
  • the achromatic ability is better.
  • the cemented lens formed by the mechanical combination has better assembly coaxiality than the separate lens. Therefore, it is beneficial to the improvement of the assembly yield and the reduction of the overall cost of the lens. .
  • the object side and/or the image side of the fifth lens are provided with inflection points.
  • inflection points By setting a plurality of inflection points on the fifth lens, it is beneficial to correct the first lens, the second lens, and the second lens.
  • the distortion and curvature of field produced by the three lenses and the fourth lens make the refractive power configuration closer to the imaging surface more uniform.
  • the restriction on the refractive power of the first to fifth lenses and the restriction on the inflection point of the fifth lens are beneficial to improve the image quality.
  • the design difficulty of the small fourth lens and the fifth lens by limiting the range of (
  • the optical system satisfies the conditional formula: 1.4 ⁇ EPD/SD31 ⁇ 1.9; EPD is the entrance pupil diameter of the optical system, and SD31 is the optical effective radius length of the object side of the third lens.
  • EPD is the entrance pupil diameter of the optical system
  • SD31 is the optical effective radius length of the object side of the third lens.
  • the optical system satisfies the conditional formula:
  • R41 is the radius of curvature of the object side surface of the fourth lens at the optical axis, and R51 is the object side surface of the fifth lens The radius of curvature at the optical axis.
  • the fourth lens with positive refractive power will increase the spherical aberration of the system components.
  • the setting of multiple inflection points of the fifth lens reasonably distributes the refractive power in the vertical direction, controls the overall aberration of the optical system, and helps to diffuse the spot. Reduction in size.
  • the optical system satisfies the conditional formula: 1 ⁇ (
  • SAG51 is the intersection of the object side surface of the fifth lens and the optical axis to the fifth
  • SAG52 is the distance between the intersection of the image side of the fifth lens and the optical axis to the apex of the maximum effective radius of the image side of the fifth lens
  • CT5 is the thickness of the fifth lens on the optical axis.
  • the optical system satisfies the conditional formula: 3.4mm ⁇ TTL ⁇ 4.1mm; TTL is the distance from the object side of the first lens to the imaging surface of the optical system on the optical axis. Through the limitation of TTL, it is conducive to the miniaturization of the optical system.
  • the present application provides a lens module including a lens barrel and the optical system described in any one of the foregoing embodiments, and the optical system is installed in the lens barrel.
  • the present application provides a terminal device including the aforementioned lens module.
  • This application restricts the surface shape and refractive power of the first lens to the fifth lens and the range of (n2+n3)/f in the optical system, and sets the second lens and the third lens to be cemented to form a cemented lens, which is conducive to improving the optics
  • the assembly yield of the system makes the optical system have lower sensitivity and is easy to realize the characteristics of miniaturization.
  • 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.
  • Fig. 3 is a spherical aberration curve of the optical system of the first embodiment
  • Fig. 6 is a schematic structural diagram of an optical system provided by a second embodiment of the present application.
  • Fig. 9 is a distortion curve of the optical system of the second embodiment.
  • FIG. 10 is a schematic structural diagram of an optical system provided by a third embodiment of the present application.
  • Fig. 12 is an astigmatism curve of the optical system of the third embodiment
  • FIG. 14 is a schematic structural diagram of an optical system provided by a fourth embodiment of the present application.
  • FIG. 17 is a distortion curve of the optical system of the fourth embodiment.
  • FIG. 18 is a schematic structural diagram of an optical system provided by a fifth embodiment of the present application.
  • FIG. 19 is a spherical aberration curve of the optical system of the fifth embodiment.
  • the optical system 10 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 monitoring device, a vehicle-mounted device, and the like.
  • the optical system 10 is installed in the lens barrel of the lens module 20, and the lens module 20 is assembled inside the terminal device 30.
  • the first lens has positive refractive power, and 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 fourth lens has positive refractive power, so The object side surface of the fourth lens is concave at the optical axis, and the image side surface of the fourth lens is convex at the optical axis; the fifth lens has negative refractive power.
  • the image side surface of the second lens is cemented with the object side surface of the third lens, and the optical system satisfies the following conditional formula: 1.0mm -1 ⁇ (n2+n3)/f ⁇ 1.4mm -1 ;
  • n2 is The refractive index of the second lens,
  • n3 is the refractive index of the third lens, and
  • f is the effective focal length of the optical system.
  • the straight line in the middle represents the optical axis
  • the left side of the optical system is the object side
  • the right side is the image side.
  • a stop STO from the object side to the image side along the optical axis, there are a stop STO, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5,
  • the infrared filter element IRCF wherein the second lens L2 and the third lens L3 are arranged as a cemented lens, and the cemented lens is beneficial to reduce chromatic aberration.
  • the first lens L1 has positive refractive power and is made of plastic. 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 at the circumference It is convex and all aspherical.
  • the second lens L2 has positive refractive power and is made of plastic. Its object side surface S3 is convex at the optical axis and at the circumference, its image side surface S4 is concave at the optical axis, and its image side surface S4 is at the circumference It is convex and all aspherical.
  • the third lens L3 has negative refractive power and is made of plastic. Its object-side surface S5 is convex at the optical axis, its object-side surface S5 is concave at the circumference, and its image-side surface S6 is at the optical axis and at the circumference. It is concave and 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 non- Spherical.
  • the fifth lens L5 has negative refractive power and is made of plastic. Its object side surface S9 is concave at the optical axis and at the circumference, its image side surface S10 is concave at the optical axis, and its image side surface S10 is at the circumference It is convex and all aspherical.
  • 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.
  • Table 1a shows a table of the characteristics of the optical system of this embodiment.
  • the units of the Y radius (that is, the radius of curvature), the thickness, and the focal length are all millimeters (mm).
  • f is the effective focal length of the optical system
  • FNO is the number of apertures 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 The distance on the optical axis.
  • the object side surface and the image side surface of any one of the first lens L1 to the fifth lens L5 are aspherical surfaces, and the surface shape of each aspherical lens can be defined by but not limited to the following aspherical surface formula:
  • Table 1b shows the high-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 first embodiment.
  • FIG. 3 shows the spherical aberration curve of the optical system of the first embodiment, which represents the deviation of the focus points of light rays of different wavelengths after passing through the lenses of the optical system;
  • FIG. 4 shows the astigmatism curve of the optical system of the first embodiment, which represents meridional field curvature and sagittal field curvature;
  • FIG. 3 FIG. 4, and FIG. 5, it can be seen that the optical system provided in the first embodiment can achieve good imaging quality.
  • the straight line in the middle represents the optical axis
  • the left side of the optical system is the object side
  • the right side is the image side.
  • a stop STO from the object side to the image side along the optical axis, there are a stop STO, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5,
  • the infrared filter element IRCF wherein the second lens L2 and the third lens L3 are arranged as a cemented lens, and the cemented lens is beneficial to reduce chromatic aberration.
  • the first lens L1 has positive refractive power and is made of plastic. 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 at the circumference It is convex and all aspherical.
  • the second lens L2 has a positive 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 convex at the optical axis and at the circumference. Spherical.
  • 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, and its image side surface S6 is concave at the optical axis and at the circumference, and both are non Spherical.
  • 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 non- Spherical.
  • the fifth lens L5 has negative refractive power and is made of plastic. Its object side surface S9 is concave at the optical axis and at the circumference, its image side surface S10 is concave at the optical axis, and its image side surface S10 is at the circumference It is convex and all aspherical.
  • 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.
  • Table 2a shows a table of the characteristics of the optical system of this embodiment.
  • the units of the Y radius (that is, the radius of curvature), the thickness, and the focal length are all millimeters (mm).
  • f is the effective focal length of the optical system
  • FNO is the number of apertures of the optical system
  • FOV is the angle of view in the diagonal direction of the optical system
  • TTL is the distance from the object side of the first lens to the optical system The distance of the imaging surface on the optical axis.
  • S4/S5 refers to the image side surface of the second lens and the object side surface of the third lens.
  • the image side surface S4 of the second lens and the object side surface S5 of the third lens are cemented together. Therefore, it is embodied as one surface in the data.
  • Table 2b 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 second embodiment.
  • FIG. 7 shows the spherical aberration curve of the optical system of the second embodiment, which represents the deviation of the focus points of light rays of different wavelengths after passing through the lenses of the optical system;
  • FIG. 8 shows the astigmatism curve of the optical system of the second embodiment, which represents meridional field curvature and sagittal field curvature;
  • FIG. 9 shows a distortion curve of the optical system of the second embodiment, which represents the distortion magnitude values corresponding to different field angles
  • the first lens L1 has positive refractive power and is made of plastic material. 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. Spherical.
  • the second lens L2 has positive refractive power and is made of plastic. Its object side surface S3 is convex at the optical axis, its object side surface S3 is concave at the circumference, and its image side surface S4 is at the optical axis and at the circumference It is concave and all aspherical.
  • the third lens L3 has a negative refractive power and is made of plastic. Its object side surface S5 is convex at the optical axis and at the circumference, and its image side surface S6 is concave at the optical axis and at the circumference. Spherical.
  • 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 non- Spherical.
  • the fifth lens L5 has negative refractive power and is made of plastic. Its object-side surface S9 is convex at the optical axis, its object-side surface S9 is concave at the circumference, and its image-side surface S10 is concave at the optical axis. The image side surface S10 is convex on the circumference, and all are aspherical.
  • Table 3a shows a table of the characteristics of the optical system of this embodiment.
  • the units of the Y radius (that is, the radius of curvature), the thickness, and the focal length are all millimeters (mm).
  • f is the effective focal length of the optical system
  • FNO is the number of apertures of the optical system
  • FOV is the angle of view in the diagonal direction of the optical system
  • TTL is the distance from the object side of the first lens to the optical system The distance of the imaging surface on the optical axis.
  • S4/S5 refers to the image side surface of the second lens and the object side surface of the third lens.
  • the image side surface S4 of the second lens and the object side surface S5 of the third lens are cemented together. Therefore, it is embodied as one surface in the data.
  • FIG. 11 shows the spherical aberration curve of the optical system of the third embodiment, which represents the deviation of the focus points of light rays of different wavelengths after passing through the lenses of the optical system;
  • FIG. 13 shows a distortion curve of the optical system of the third embodiment, which represents the distortion magnitude values corresponding to different field angles
  • the straight line in the middle represents the optical axis
  • the left side of the optical system is the object side
  • the right side is the image side.
  • a stop STO from the object side to the image side along the optical axis, there are a stop STO, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5,
  • the infrared filter element IRCF wherein the second lens L2 and the third lens L3 are arranged as a cemented lens, and the cemented lens is beneficial to reduce chromatic aberration.
  • 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, and its image side surface S2 is convex at the optical axis and at the circumference, and both are non- Spherical.
  • 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 concave at the optical axis, and its image side surface S6 is at the circumference It is convex and 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 at the circumference, and its image side surface S10 is convex at the optical axis and at the circumference, and both are non- Spherical.
  • 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.
  • Table 4a shows a table of the characteristics of the optical system of this embodiment, and the units of the Y radius (that is, the radius of curvature), the thickness, and the focal length are all millimeters (mm).
  • S4/S5 refers to the image side surface of the second lens and the object side surface of the third lens.
  • the image side surface S4 of the second lens and the object side surface S5 of the third lens are cemented together. Therefore, it is embodied as one surface in the data.
  • Table 4b 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 fourth embodiment.
  • FIG. 15 shows the spherical aberration curve of the optical system of the fourth embodiment, which represents the deviation of the focus points of light rays of different wavelengths after passing through the lenses of the optical system;
  • FIG. 16 shows the astigmatism curve of the optical system of the fourth embodiment, which represents meridional field curvature and sagittal field curvature;
  • FIG. 17 shows a distortion curve of the optical system of the fourth embodiment, which represents the distortion magnitude values corresponding to different field angles
  • the straight line in the middle represents the optical axis
  • the left side of the optical system is the object side
  • the right side is the image side.
  • a stop STO from the object side to the image side along the optical axis, there are a stop STO, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5,
  • the infrared filter element IRCF wherein the second lens L2 and the third lens L3 are arranged as a cemented lens, and the cemented lens is beneficial to reduce chromatic aberration.
  • the first lens L1 has positive refractive power and is made of plastic. 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 at the circumference It is convex and all 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 and at the circumference, its image side surface S4 is convex at the optical axis, and its image side surface S4 is at the circumference It is concave and 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 non- Spherical.
  • the fifth lens L5 has negative refractive power and is made of plastic. Its object-side surface S9 is convex at the optical axis, its object-side surface S9 is concave at the circumference, and its image-side surface S10 is concave at the optical axis. The image side surface S10 is convex on the circumference, and all are aspherical.
  • 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.
  • f is the effective focal length of the optical system
  • FNO is the number of apertures of the optical system
  • FOV is the angle of view in the diagonal direction of the optical system
  • TTL is the distance from the object side of the first lens to the optical system The distance of the imaging surface on the optical axis.
  • Table 5b 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 fifth embodiment.
  • FIG. 19 shows the spherical aberration curve of the optical system of the fifth embodiment, which represents the deviation of the focus points of light rays of different wavelengths after passing through the lenses of the optical system;
  • FIG. 20 shows the astigmatism curve of the optical system of the fifth embodiment, which represents meridional field curvature and sagittal field curvature;
  • FIG. 19 FIG. 20, and FIG. 21, it can be seen that the optical system provided in the fifth embodiment can achieve good imaging quality.
  • Table 6 shows the (n2+n3)/f values of the optical systems of the first embodiment to the fifth embodiment. It can be seen from Table 6 that each embodiment satisfies the condition: 1.0mm -1 ⁇ (n2+n3)/ f ⁇ 1.4mm -1 .
  • Table 7 shows the (
  • the third embodiment 4.25 Fourth embodiment -1.57 Fifth embodiment -3.75
  • Table 10 shows the EPD/SD31 values of the optical systems of the first embodiment to the fifth embodiment. It can be seen from Table 10 that each embodiment satisfies the condition: 1.4 ⁇ EPD/SD31 ⁇ 1.9.
  • Table 11 shows the f/
  • Table 12 shows the (
  • the third embodiment 7.20 Fourth embodiment 10.95 Fifth embodiment 13.06

Abstract

光学系统、镜头模组及终端设备。光学系统包括沿着光轴从物侧至像侧的第一透镜（L1），具有正屈折力，第一透镜（L1）的物侧面于光轴处为凸面；第二透镜（L2），具有屈折力；第三透镜（L3），具有屈折力；第四透镜（L4），具有正屈折力，第四透镜（L4）的物侧面于光轴处为凹面，第四透镜（L4）的像侧面于光轴处为凸面；第五透镜（L5），具有负屈折力；第二透镜（L2）的像侧面与第三透镜（L3）的像侧面胶合，且满足以下条件：1.0mm -1<（n2+n3）/f<1.4mm -1；n2为第二透镜（L2）的折射率，n3为第三透镜（L3）的折射率，f为光学系统的有效焦距。合理配置第一（L1）至第五透镜（L5）的面型与屈折力关系及（n2+n3）/f的比值，并设置第二透镜（L2）和第三透镜（L3）为胶合透镜，有利于提升光学系统的组装良率。

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
随着科学技术的发展和智能手机及智能电子设备的普及，具有取像功能的设备得到人们的广泛青睐。
为降低移动智能设备的重量和成本，取像用镜头已多采用塑料镜片，这样提高了成型效率，利于镜头大规模量产，但由于分离式塑料镜片重量轻，尺寸小，且片数不断增多，采用负压吸附式的组装方式也难以控制镜片组装过程中的离轴与偏移量，使得良率难以提升。
如何设计利于提升组装良率的取像用光学镜头装置应为业界研发的方向。
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，该光学系统组装方便，利于提升组装良率，且具有较低组装敏感度的特征。
第一方面，本申请实施例提供了一种光学系统，沿着光轴方向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；第四透镜，具有正屈折力，所述第四透镜的物侧面于光轴处为凹面，所述第四透镜的像侧面于光轴处为凸面；第五透镜，具有负屈折力，所述第二透镜的像侧面与所述第三透镜的物侧面胶合，所述光学系统满足以下条件式：1.0mm -1＜(n2+n3)/f≤1.4mm -1；n2为所述第二透镜的折射率，n3为所述第三透镜的折射率，f为所述光学系统的有效焦距。
本申请通过在光学系统中限制第一透镜至第五透镜的面型与屈折力及(n2+n3)/f的比值范围，并设置第二透镜和第三透镜胶合形成胶合透镜，使得在组装的过程中，避免了第二透镜和第三透镜同轴对准的操作，有利于提升光学系统的组装良率，且使光学系统具有较低的组装敏感度。
其中，在设置第二透镜和第三透镜组合为胶合透镜的情况下，通过限定(n2+n3)/f的范围，合理配置第二透镜与第三透镜的屈折力，可最大限度减小色差与球差，提高像质。相较于分离式透镜，消色差能力更优，机械组合形成的胶合透镜，组装同轴性较分离式透镜更好，因此，利于组装良率的提升，同时，有助于镜头综合成本的降低。
一种实施方式中，所述第五透镜的物侧面和/或像侧面设有反曲点，通过在第五透镜上设置多个反曲点，有利于修正第一透镜、第二透镜、第三透镜和第四透镜产生的畸变和场曲，使靠近成像面的屈折力配置较为均匀。通过对第一至第五透镜的屈折力的限制及第五透镜反曲点的限制有利于提升像质。
一种实施方式中，所述光学系统满足条件式：-1.8＜f23/f＜11.5；f23为所述第二透镜和所述第三透镜的组合焦距，f为所述光学系统的有效焦距。胶合透镜有利于减小色差， 通过对第二透镜和第三透镜屈折力的合理分配，利于逐渐扩散光线，避免第四透镜和第五透镜引起光线偏转角过大，通过限定-1.8＜f23/f＜11.5，使得第二透镜和第三透镜组合形成的胶合透镜产生的像差极力压缩，进而提升像质，降低组装敏感度。
一种实施方式中，所述光学系统满足条件式：-3.8＜(|f2|+|f3|)/R31＜4.3；f2为所述第二透镜的有效焦距，f3为所述第三透镜的有效焦距，R31为所述第三透镜的物侧面于光轴处的曲率半径。胶合透镜有利于减小色差，第三透镜配合胶合透镜做出屈折力的调整，有助于将第一透镜、第二透镜和第三透镜的综合球差、色差、畸变降到合理范围，减小第四透镜和第五透镜的设计难度；通过限定(|f2|+|f3|)/R31的范围，使得第三透镜的曲率半径分配适当，避免面型过度复杂，有助于透镜成型与制造。
一种实施方式中，所述光学系统满足条件式：0.1＜f/|f3|＜0.8；f3为所述第三透镜的有效焦距，f为所述光学系统的有效焦距。第三透镜屈折力的合理分配，利于逐渐扩散光线，避免第四透镜和第五透镜引起光线偏转角过大，通过对f/|f3|的范围的限定，可使得第三透镜产生的像差极力压缩，进而提升像质，降低组装敏感度。
一种实施方式中，所述光学系统满足条件式：1.4＜EPD/SD31＜1.9；EPD为所述光学系统的入瞳直径，SD31为所述第三透镜的物侧面的光学有效半径长度。通过合理配置EPD/SD31的范围，使得第三透镜与第一透镜有近似的光学口径，有利于光学系统具有较小的体积，并利于透镜的排布和镜头模组尺寸的压缩，同时，减小光线角度偏转角，降低系统的敏感度。
一种实施方式中，所述光学系统满足条件式：5＜(|f1|+|f2|+|f3|)/f＜14；f1为所述第一透镜的有效焦距，f2为所述第二透镜的有效焦距，f3为所述第三透镜的有效焦距，f为所述光学系统的有效焦距。通过限定(|f1|+|f2|+|f3|)/f的范围，合理配置第一透镜、第二透镜和第三透镜的尺寸与屈折力，可有效避免第一透镜、第二透镜和第三透镜产生的较大球差，提升光学系统整体的解像力，同时，利于第一透镜、第二透镜和第三透镜的尺寸压缩，有助于形成小尺寸光学镜头。
一种实施方式中，所述光学系统满足条件式：1.2≤|R41|/f4＜2.9；R41为所述第四透镜的物侧面于光轴处的曲率半径，f4为所述第四透镜的有效焦距。合理配置|R41|/f4的范围以及第四透镜合理的光焦度与曲率半径的设置，可使得第四透镜面型复杂度低，一定程度抑制了子午方向场曲、畸变的增加，利于降低成型难度，提升整体像质。
一种实施方式中，所述光学系统满足条件式：|R41/R51|＜6；R41为所述第四透镜的物侧面于光轴处的曲率半径，R51为所述第五透镜的物侧面于光轴处的曲率半径。正屈折力的第四透镜会增加系统组件的球差，第五透镜多个反曲点的设置，合理地分配了垂直方向的屈折力，控制了光学系统的整体像差，有助于弥散斑尺寸的降低。
一种实施方式中，所述光学系统满足条件式：1＜(|SAG51|+SAG52)/CT5＜2.5；SAG51为所述第五透镜的物侧面与所述光轴的交点至所述第五透镜的物侧面的最大有效半径顶点之间的轴上距离，SAG52为所述第五透镜的像侧面与所述光轴的交点至所述第五透镜的像侧面的最大有效半径顶点之间的轴上距离，CT5为所述第五透镜于光轴上的厚度。合理配置(|SAG51|+SAG52)/CT5的范围，可有效控制透镜在垂直方向的屈折力与厚度，避免透镜过薄或过厚，减小光线在像面上的入射角，降低光学系统的敏感性。
一种实施方式中，所述光学系统满足条件式：3.4mm＜TTL＜4.1mm；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TTL的限定，有利于光学系统的小型化。
一种实施方式中，所述光学系统满足条件式：74°≤FOV≤92°；FOV为所述光学系统的最大视场的视场角。
第二方面，本申请提供一种镜头模组，包括镜筒和前述任意一种实施方式所述的光学系统，所述光学系统安装在所述镜筒内。
第三方面，本申请提供一种终端设备，包括所述的镜头模组。
本申请通过在光学系统中限制第一透镜至第五透镜的面型与屈折力及(n2+n3)/f的范围，并设置第二透镜和第三透镜胶合形成胶合透镜，有利于提升光学系统的组装良率，且使光学系统具有较低的敏感度并易于实现小型化的特征。
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球差曲线；
图4是第一实施例的光学系统的像散曲线；
图5是第一实施例的光学系统的畸变曲线；
图6是本申请第二实施例提供的光学系统的结构示意图；
图7是第二实施例的光学系统的球差曲线；
图8是第二实施例的光学系统的像散曲线；
图9是第二实施例的光学系统的畸变曲线；
图10是本申请第三实施例提供的光学系统的结构示意图；
图11是第三实施例的光学系统的球差曲线；
图12是第三实施例的光学系统的像散曲线；
图13是第三实施例的光学系统的畸变曲线；
图14是本申请第四实施例提供的光学系统的结构示意图；
图15是第四实施例的光学系统的球差曲线；
图16是第四实施例的光学系统的像散曲线；
图17是第四实施例的光学系统的畸变曲线；
图18是本申请第五实施例提供的光学系统的结构示意图；
图19是第五实施例的光学系统的球差曲线；
图20是第五实施例的光学系统的像散曲线；
图21是第五实施例的光学系统的畸变曲线。
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10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、监控、车载等设备。光学系统10安装在镜头模组20的镜筒内，镜头模组20组装在终端设备30内部。
一种实施方式中，本申请提供的光学系统包括五个透镜，所述五个透镜沿着光轴方向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。其中，第二透镜和第三透镜组成胶合透镜，胶合透镜有利于减小色差。
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，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；第四透镜，具有正屈折力，所述第四透镜的物侧面于光轴处为凹面，所述第四透镜的像侧面于光轴处为凸面；第五透镜，具有负屈折力。
其中，所述第二透镜的像侧面与所述第三透镜的物侧面胶合，所述光学系统满足以下条件式：1.0mm -1＜(n2+n3)/f≤1.4mm -1；n2为所述第二透镜的折射率，n3为所述第三透镜的折射率，f为所述光学系统的有效焦距。
通过在光学系统中限制第一透镜至第五透镜的面型与屈折力及(n2+n3)/f的比值范围，并设置第二透镜和第三透镜胶合形成胶合透镜，有利于提升光学系统的组装良率，且使光学系统具有较低的组装敏感度。
以下通过五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，中间的直线表示光轴，光学系统的左侧为物侧，右侧为像侧。本实施例提供的光学系统中，沿着光轴从物侧到像侧依次为光阑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、红外滤光元件IRCF，其中，第二透镜L2和第三透镜L3设置为胶合透镜，胶合透镜有利于减小色差。
第一透镜L1具有正屈折力，且为塑料材质，其物侧表面S1于光轴处和于圆周处为凸面，其像侧表面S2于光轴处为凹面，其像侧表面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，其物侧表面S3于光轴处和于圆周处为凸面，其像侧表面S4于光轴处为凹面，其像侧表面S4于圆周处为凸面，并皆为非球面。
第三透镜L3具有负屈折力，且为塑料材质，其物侧表面S5于光轴处为凸面，其物侧表面S5于圆周处为凹面，其像侧表面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，其物侧表面S7于光轴处和于圆周处为凹面，其像侧表面S8于光轴处和于圆周处为凸面，并皆为非球面。
第五透镜L5具有负屈折力，且为塑料材质，其物侧表面S9于光轴处和于圆周处为凹面，其像侧表面S10于光轴处为凹面，其像侧表面S10于圆周处为凸面，并皆为非球面。
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。
表1a示出了本实施例的光学系统的特性的表格，Y半径(即曲率半径)、厚度和焦距的单位均为毫米(mm)。
表1a
Figure PCTCN2020079309-appb-000001
其中，f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。
S4/S5是指第二透镜的像侧面和第三透镜的物侧面，第二透镜的像侧面S4和第三透镜的物侧面S5胶合在一起，因此，在数据上体现为一个面。
在本实施例中，第一透镜L1至第五透镜L5的任意一个透镜的物侧面和像侧面均为非球面，各非球面透镜的面型可利用但不限于以下非球面公式进行限定：
Figure PCTCN2020079309-appb-000002
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，如A4、A6或A8。
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
Figure PCTCN2020079309-appb-000003
Figure PCTCN2020079309-appb-000004
图3示出了第一实施例的光学系统的球差曲线，其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；
图4示出了第一实施例的光学系统的像散曲线，其表示子午像面弯曲和弧矢像面弯曲；
图5示出了第一实施例的光学系统的畸变曲线，其表示不同视场角对应的畸变大小值；
根据图3、图4和图5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6所示，中间的直线表示光轴，光学系统的左侧为物侧，右侧为像侧。本实施例提供的光学系统中，沿着光轴从物侧到像侧依次为光阑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、红外滤光元件IRCF，其中，第二透镜L2和第三透镜L3设置为胶合透镜，胶合透镜有利于减小色差。
第一透镜L1具有正屈折力，且为塑料材质，其物侧表面S1于光轴处和于圆周处为凸面，其像侧表面S2于光轴处为凹面，其像侧表面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，其物侧表面S3于光轴处和于圆周处为凸面，其像侧表面S4于光轴处和于圆周处为凸面，并皆为非球面。
第三透镜L3具有负屈折力，且为塑料材质，其物侧表面S5于光轴处和于圆周处为凹面，其像侧表面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，其物侧表面S7于光轴处和于圆周处为凹面，其像侧表面S8于光轴处和于圆周处为凸面，并皆为非球面。
第五透镜L5具有负屈折力，且为塑料材质，其物侧表面S9于光轴处和于圆周处为凹面，其像侧表面S10于光轴处为凹面，其像侧表面S10于圆周处为凸面，并皆为非球面。
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。
表2a示出了本实施例的光学系统的特性的表格，Y半径(即曲率半径)、厚度和焦距的单位均为毫米(mm)。
表2a
Figure PCTCN2020079309-appb-000005
其中，f为所述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。
S4/S5是指第二透镜的像侧面和第三透镜的物侧面，第二透镜的像侧面S4和第三透镜的物侧面S5胶合在一起，因此，在数据上体现为一个面。
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，其中，各非球面面 型可由第一实施例中给出的公式限定。
表2b
Figure PCTCN2020079309-appb-000006
图7示出了第二实施例的光学系统的球差曲线，其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；
图8示出了第二实施例的光学系统的像散曲线，其表示子午像面弯曲和弧矢像面弯曲；
图9示出了第二实施例的光学系统的畸变曲线，其表示不同视场角对应的畸变大小值；
根据图7、图8和图9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10所示，中间的直线表示光轴，光学系统的左侧为物侧，右侧为像侧。本实施例提供的光学系统中，沿着光轴从物侧到像侧依次为光阑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、红外滤光元件IRCF，其中，第二透镜L2和第三透镜L3设置为胶合透镜，胶合透镜有利于减小色差。
第一透镜L1具有正屈折力，且为塑料材质，其物侧表面S1于光轴处和于圆周处为凸面，其像侧表面S2于光轴处和与圆周处为凸面，并皆为非球面。
第二透镜L2具有正屈折力，且为塑料材质，其物侧表面S3于光轴处为凸面，其物侧表面S3于圆周处为凹面，其像侧表面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，其物侧表面S5于光轴处和于圆周处为凸面，其像侧表面S6于光轴处和与圆周处为凹面，并皆为非球面。
第四透镜L4具有正屈折力，且为塑料材质，其物侧表面S7于光轴处和于圆周处为凹面，其像侧表面S8于光轴处和于圆周处为凸面，并皆为非球面。
第五透镜L5具有负屈折力，且为塑料材质，其物侧表面S9于光轴处为凸面，其物侧表面S9于圆周处为凹面，其像侧表面S10于光轴处为凹面，其像侧表面S10于圆周处为凸面，并皆为非球面。
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。
表3a示出了本实施例的光学系统的特性的表格，Y半径(即曲率半径)、厚度和焦距的单位均为毫米(mm)。
表3a
Figure PCTCN2020079309-appb-000007
其中，f为所述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。
S4/S5是指第二透镜的像侧面和第三透镜的物侧面，第二透镜的像侧面S4和第三透镜的物侧面S5胶合在一起，因此，在数据上体现为一个面。
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，其中，各非球面面型可由第一实施例中给出的公式限定。
表3b
Figure PCTCN2020079309-appb-000008
图11示出了第三实施例的光学系统的球差曲线，其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；
图12示出了第三实施例的光学系统的像散曲线，其表示子午像面弯曲和弧矢像面弯曲；
图13示出了第三实施例的光学系统的畸变曲线，其表示不同视场角对应的畸变大小值；
根据图11、图12和图13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14所示，中间的直线表示光轴，光学系统的左侧为物侧，右侧为像侧。本实施例提供的光学系统中，沿着光轴从物侧到像侧依次为光阑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、红外滤光元件IRCF，其中，第二透镜L2和第三透镜L3设置为胶合透镜，胶合透镜有利于减小色差。
第一透镜L1具有正屈折力，且为塑料材质，其物侧表面S1于光轴处和于圆周处为凸面，其像侧表面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，其物侧表面S3于光轴处和于圆周处为凹面，其像侧表面S4于光轴处和于圆周处为凸面，并皆为非球面。
第三透镜L3具有负屈折力，且为塑料材质，其物侧表面S5于光轴处和于圆周处为凹面，其像侧表面S6于光轴处为凹面，其像侧表面S6于圆周处为凸面，并皆为非球面。
第四透镜L4具有正屈折力，且为塑料材质，其物侧表面S7于光轴处和于圆周处为凹面，其像侧表面S8于光轴处和于圆周处为凸面，并皆为非球面。
第五透镜L5具有负屈折力，且为塑料材质，其物侧表面S9于光轴处和于圆周处为凹面，其像侧表面S10于光轴处和于圆周处为凸面，并皆为非球面。
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。
表4a示出了本实施例的光学系统的特性的表格，Y半径(即曲率半径)、厚度和焦距的单位均为毫米(mm)。
表4a
Figure PCTCN2020079309-appb-000009
Figure PCTCN2020079309-appb-000010
其中，f为所述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。
S4/S5是指第二透镜的像侧面和第三透镜的物侧面，第二透镜的像侧面S4和第三透镜的物侧面S5胶合在一起，因此，在数据上体现为一个面。
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，其中，各非球面面型可由第一实施例中给出的公式限定。
表4b
Figure PCTCN2020079309-appb-000011
图15示出了第四实施例的光学系统的球差曲线，其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；
图16示出了第四实施例的光学系统的像散曲线，其表示子午像面弯曲和弧矢像面弯曲；
图17示出了第四实施例的光学系统的畸变曲线，其表示不同视场角对应的畸变大小值；
根据图15、图16和图17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18所示，中间的直线表示光轴，光学系统的左侧为物侧，右侧为像侧。本实施例提供的光学系统中，沿着光轴从物侧到像侧依次为光阑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、红外滤光元件IRCF，其中，第二透镜L2和第三透镜L3设置为胶合透镜，胶合透镜有利于减小色差。
第一透镜L1具有正屈折力，且为塑料材质，其物侧表面S1于光轴处和于圆周处为凸面，其像侧表面S2于光轴处为凹面，其像侧表面S2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，其物侧表面S3于光轴处和于圆周处为凹面，其像侧表面S4于光轴处为凸面，其像侧表面S4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，其物侧表面S5于光轴处为凹面，其物侧表面S5于圆周处为凸面，其像侧表面S6于光轴处和于圆周处为凸面，并皆为非球面。
第四透镜L4具有正屈折力，且为塑料材质，其物侧表面S7于光轴处和于圆周处为凹面，其像侧表面S8于光轴处和于圆周处为凸面，并皆为非球面。
第五透镜L5具有负屈折力，且为塑料材质，其物侧表面S9于光轴处为凸面，其物侧表面S9于圆周处为凹面，其像侧表面S10于光轴处为凹面，其像侧表面S10于圆周处为凸面，并皆为非球面。
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。
表5a示出了本实施例的光学系统的特性的表格，Y半径(即曲率半径)、厚度和焦距的单位均为毫米(mm)。
表5a
Figure PCTCN2020079309-appb-000012
Figure PCTCN2020079309-appb-000013
其中，f为所述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。
S4/S5是指第二透镜的像侧面和第三透镜的物侧面，第二透镜的像侧面S4和第三透镜的物侧面S5胶合在一起，因此，在数据上体现为一个面。
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，其中，各非球面面型可由第一实施例中给出的公式限定。
表5b
Figure PCTCN2020079309-appb-000014
Figure PCTCN2020079309-appb-000015
图19示出了第五实施例的光学系统的球差曲线，其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；
图20示出了第五实施例的光学系统的像散曲线，其表示子午像面弯曲和弧矢像面弯曲；
图21示出了第五实施例的光学系统的畸变曲线，其表示不同视场角对应的畸变大小值；
根据图19、图20和图21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。
表6示出了第一实施例至第五实施例的光学系统的(n2+n3)/f数值，由表6可知，各实施例均满足条件：1.0mm -1＜(n2+n3)/f＜1.4mm -1。
表6
  (n2+n3)/f
第一实施例 1.01
第二实施例 1.13
第三实施例 1.22
第四实施例 1.35
第五实施例 1.36
表7示出了第一实施例至第五实施例的光学系统的(|SAG51|+SAG52)/CT5数值，由表7可知，各实施例均满足条件：1＜(|SAG51|+SAG52)/CT5＜2.5。
表7
  (|SAG51|+SAG52)/CT5
第一实施例 1.30
第二实施例 2.44
第三实施例 0.98
第四实施例 1.30
第五实施例 1.66
表8示出了第一实施例至第五实施例的光学系统的(|f2|+|f3|)/R31数值，由表8可知，各实施例均满足条件：-3.8＜(|f2|+|f3|)/R31＜4.3。
表8
  (|f2|+|f3|)/R31
第一实施例 1.99
第二实施例 -0.22
第三实施例 4.25
第四实施例 -1.57
第五实施例 -3.75
表9示出了第一实施例至第五实施例的光学系统的f23/f数值，由表9可知，各实施例均满足条件：-1.8＜f23/f＜11.5。
表9
  f23/f
第一实施例 1.80
第二实施例 2.45
第三实施例 -3.44
第四实施例 -1.74
第五实施例 11.54
表10示出了第一实施例至第五实施例的光学系统的EPD/SD31数值，由表10可知，各实施例均满足条件：1.4＜EPD/SD31＜1.9。
表10
  EPD/SD31
第一实施例 1.73
第二实施例 1.81
第三实施例 1.52
第四实施例 1.43
第五实施例 1.42
表11示出了第一实施例至第五实施例的光学系统的f/|f3|数值，由表11可知，各实施例均满足条件：0.1＜f/|f3|＜0.8。
表11
  f/|f3|
第一实施例 0.76
第二实施例 0.36
第三实施例 0.74
第四实施例 0.17
第五实施例 0.26
表12示出了第一实施例至第五实施例的光学系统的(|f1|+|f2|+|f3|)/f数值，由表12可知，各实施例均满足条件：5＜(|f1|+|f2|+|f3|)/f＜14。
表12
  (|f1|+|f2|+|f3|)/f
第一实施例 5.67
第二实施例 7.62
第三实施例 7.20
第四实施例 10.95
第五实施例 13.06
表13示出了第一实施例至第五实施例的光学系统的|R41/R51|数值，由表13可知，各实施例均满足条件：|R41/R51|＜6。
表13
  |R41/R51|
第一实施例 1.93
第二实施例 0.64
第三实施例 1.92
第四实施例 5.94
第五实施例 3.71
表14示出了第一实施例至第五实施例的光学系统的|R41|/f4数值，由表14可知，各实施例均满足条件：1.2≤|R41|/f4＜2.9。
表14
  |R41|/f4
第一实施例 1.67
第二实施例 1.77
第三实施例 1.74
第四实施例 2.02
第五实施例 1.23
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 (14)

  1. 一种光学系统，其特征在于，包括沿着光轴方向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；
    第四透镜，具有正屈折力，所述第四透镜的物侧面于光轴处为凹面，所述第四透镜的像侧面于光轴处为凸面；
    第五透镜，具有负屈折力；
    所述第二透镜的像侧面与所述第三透镜的物侧面胶合，所述光学系统满足以下条件式：
    1.0mm -1＜(n2+n3)/f≤1.4mm -1；
    n2为所述第二透镜的折射率，n3为所述第三透镜的折射率，f为所述光学系统的有效焦距。
  2. 根据权利要求1所述的光学系统，其特征在于，所述第五透镜的物侧面和/或像侧面设有反曲点。
  3. 根据权利要求1至2任一项所述的光学系统，其特征在于，所述光学系统满足条件式：
    -1.8＜f23/f＜11.5；
    f23为所述第二透镜和所述第三透镜的组合焦距，f为所述光学系统的有效焦距。
  4. 根据权利要求1至2任一项所述的光学系统，其特征在于，所述光学系统满足条件式：
    -3.8＜(|f2|+|f3|)/R31＜4.3；
    f2为所述第二透镜的有效焦距，f3为所述第三透镜的有效焦距，R31为所述第三透镜的物侧面于光轴处的曲率半径。
  5. 根据权利要求1至2任一项所述的光学系统，其特征在于，所述光学系统满足条件式：
    0.1＜f/|f3|＜0.8；
    f3为所述第三透镜的有效焦距，f为所述光学系统的有效焦距。
  6. 根据权利要求1至2任一项所述的光学系统，其特征在于，所述光学系统满足条件式：
    1.4＜EPD/SD31＜1.9；
    EPD为所述光学系统的入瞳直径，SD31为所述第三透镜的物侧面的光学有效半径长度。
  7. 根据权利要求1至2任一项所述的光学系统，其特征在于，所述光学系统满足条件式：
    5＜(|f1|+|f2|+|f3|)/f＜14；
    f1为所述第一透镜的有效焦距，f2为所述第二透镜的有效焦距，f3为所述第三透镜的有效焦距，f为所述光学系统的有效焦距。
  8. 根据权利要求1至2任一项所述的光学系统，其特征在于，所述光学系统满足条件式：
    1.2≤|R41|/f4＜2.9；
    R41为所述第四透镜的物侧面于光轴处的曲率半径，f4为所述第四透镜的有效焦距。
  9. 根据权利要求1至2任一项所述的光学系统，其特征在于，所述光学系统满足条件式：
    |R41/R51|＜6；
    R41为所述第四透镜的物侧面于光轴处的曲率半径，R51为所述第五透镜的物侧面于光轴处的曲率半径。
  10. 根据权利要求1至2任一项所述的光学系统，其特征在于，所述光学系统满足条件式：
    1＜(|SAG51|+SAG52)/CT5＜2.5；
    SAG51为所述第五透镜的物侧面与所述光轴的交点至所述第五透镜的物侧面的最大有效半径顶点之间的轴上距离，SAG52为所述第五透镜的像侧面与所述光轴的交点至所述第五透镜的像侧面的最大有效半径顶点之间的轴上距离，CT5为所述第五透镜于光轴上的厚度。
  11. 根据权利要求1至2任一项所述的光学系统，其特征在于，所述光学系统满足条件式：
    3.4mm＜TTL＜4.1mm；
    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。
  12. 根据权利要求1至2任一项所述的光学系统，其特征在于，所述光学系统满足条件式：
    74°≤FOV≤92°；
    FOV为所述光学系统的最大视场的视场角。
  13. 一种镜头模组，其特征在于，包括镜筒和如权利要求1至12任一项所述的光学系统，所述光学系统安装在所述镜筒内。
  14. 一种终端设备，其特征在于，包括如权利要求13所述的镜头模组。
PCT/CN2020/079309 2020-03-13 2020-03-13 光学系统、镜头模组及终端设备 WO2021179308A1 (zh)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US17/437,385 US20220299737A1 (en) 2020-03-13 2020-03-13 Optical system, lens module, and terminal device
PCT/CN2020/079309 WO2021179308A1 (zh) 2020-03-13 2020-03-13 光学系统、镜头模组及终端设备

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2020/079309 WO2021179308A1 (zh) 2020-03-13 2020-03-13 光学系统、镜头模组及终端设备

Publications (1)

Publication Number Publication Date
WO2021179308A1 true WO2021179308A1 (zh) 2021-09-16

Family

ID=77670419

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2020/079309 WO2021179308A1 (zh) 2020-03-13 2020-03-13 光学系统、镜头模组及终端设备

Country Status (2)

Country Link
US (1) US20220299737A1 (zh)
WO (1) WO2021179308A1 (zh)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4950055A (en) * 1988-08-12 1990-08-21 Nikon Corporation Retrofocus type wide angle lens
CN1573407A (zh) * 2003-05-27 2005-02-02 柯尼卡美能达精密光学株式会社 小型成像透镜和成像装置
JP5018038B2 (ja) * 2006-11-22 2012-09-05 コニカミノルタアドバンストレイヤー株式会社 ワイドコンバーターレンズ
CN106932883A (zh) * 2015-12-30 2017-07-07 信泰光学(深圳)有限公司 光学镜头
TWI603114B (zh) * 2015-12-21 2017-10-21 新鉅科技股份有限公司 成像鏡片組
CN108363169A (zh) * 2018-02-05 2018-08-03 瑞声科技(新加坡)有限公司 摄像光学镜头
CN108363170A (zh) * 2018-02-05 2018-08-03 瑞声科技(新加坡)有限公司 摄像光学镜头

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4950055A (en) * 1988-08-12 1990-08-21 Nikon Corporation Retrofocus type wide angle lens
CN1573407A (zh) * 2003-05-27 2005-02-02 柯尼卡美能达精密光学株式会社 小型成像透镜和成像装置
JP5018038B2 (ja) * 2006-11-22 2012-09-05 コニカミノルタアドバンストレイヤー株式会社 ワイドコンバーターレンズ
TWI603114B (zh) * 2015-12-21 2017-10-21 新鉅科技股份有限公司 成像鏡片組
CN106932883A (zh) * 2015-12-30 2017-07-07 信泰光学(深圳)有限公司 光学镜头
CN108363169A (zh) * 2018-02-05 2018-08-03 瑞声科技(新加坡)有限公司 摄像光学镜头
CN108363170A (zh) * 2018-02-05 2018-08-03 瑞声科技(新加坡)有限公司 摄像光学镜头

Also Published As

Publication number Publication date
US20220299737A1 (en) 2022-09-22

Similar Documents

Publication Publication Date Title
CN110412749B (zh) 光学成像镜头
CN108445610B (zh) 光学成像镜片组
US11422341B2 (en) Camera lens assembly
CN110471167B (zh) 摄像光学镜头
CN113625423B (zh) 一种成像系统、摄像头模组及电子设备
CN109425965B (zh) 取像镜头
CN109613678B (zh) 成像镜头
WO2022061904A1 (zh) 光学系统、摄像头模组及终端设备
WO2021203425A1 (zh) 光学系统、镜头模组及终端设备
CN113296233A (zh) 光学系统、摄像头模组及电子设备
CN111399192A (zh) 光学成像镜头
CN113759511B (zh) 光学成像透镜组
CN113433656B (zh) 一种成像系统、镜头模组及电子设备
CN212989750U (zh) 光学系统、摄像头模组及终端设备
CN113759509A (zh) 光学成像镜头
CN111239976A (zh) 光学系统、镜头模组及终端设备
CN112415711A (zh) 光学系统、摄像头模组及终端设备
CN113917658B (zh) 光学成像透镜组
CN113391429B (zh) 光学系统、摄像头模组及电子设备
CN114252975B (zh) 光学成像镜头
CN112698483B (zh) 一种光学成像镜头
CN211786337U (zh) 光学系统、镜头模组及终端设备
WO2021179308A1 (zh) 光学系统、镜头模组及终端设备
CN211043778U (zh) 光学成像系统
CN113156614A (zh) 一种光学成像系统

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 20924963

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 20924963

Country of ref document: EP

Kind code of ref document: A1