WO2021087669A1 - 光学系统、取像装置及电子装置 - Google Patents

光学系统、取像装置及电子装置 Download PDF

Info

Publication number
WO2021087669A1
WO2021087669A1 PCT/CN2019/115349 CN2019115349W WO2021087669A1 WO 2021087669 A1 WO2021087669 A1 WO 2021087669A1 CN 2019115349 W CN2019115349 W CN 2019115349W WO 2021087669 A1 WO2021087669 A1 WO 2021087669A1
Authority
WO
WIPO (PCT)
Prior art keywords
lens
optical system
optical axis
convex
object side
Prior art date
Application number
PCT/CN2019/115349
Other languages
English (en)
French (fr)
Inventor
杨健
李明
Original Assignee
南昌欧菲精密光学制品有限公司
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 南昌欧菲精密光学制品有限公司 filed Critical 南昌欧菲精密光学制品有限公司
Priority to PCT/CN2019/115349 priority Critical patent/WO2021087669A1/zh
Priority to US17/606,005 priority patent/US20220206260A1/en
Priority to EP19952099.0A priority patent/EP3896510A4/en
Publication of WO2021087669A1 publication Critical patent/WO2021087669A1/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 -
    • G02B9/64—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having more than six components
    • 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 relates to the field of optical imaging technology, in particular to an optical system, an image capturing device and an electronic device.
  • the traditional miniaturized lens while ensuring the sharpness of the image, its low-light shooting ability is weak, and cannot meet the shooting needs of dark-light scenes such as night scenes, rainy days, and starry sky.
  • an optical system is provided.
  • An optical system which includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens in order from the object side to the image side along the optical axis, wherein,
  • the first lens has positive refractive power, and its object side surface is convex at the optical axis, and its image side surface is concave at the optical axis;
  • the second lens has a positive refractive power, and its object side surface is convex at the optical axis;
  • the third lens has a negative refractive power, and its object side surface is convex at the optical axis, and its image side surface is concave at the optical axis;
  • the fifth lens has a positive refractive power, and its image side surface is convex at the optical axis;
  • the seventh lens has negative refractive power, and its image side surface is concave at the optical axis;
  • optical system satisfies the following relational expression: TTL/ImgH ⁇ 1.3;
  • TTL is the distance from the object side of the first lens to the imaging surface of the optical system on the optical axis
  • ImgH is half of the diagonal length of the effective pixel area on the imaging surface of the optical system.
  • An image capturing device includes the optical system described in the above embodiment; and a photosensitive element, the photosensitive element is arranged on the image side of the optical system.
  • An electronic device includes a housing and the imaging device described in the above embodiments, and the imaging device is installed on the housing.
  • Fig. 1 shows a schematic structural diagram of an optical system according to Embodiment 1 of the present application
  • 2A to 2C are respectively a longitudinal spherical aberration curve diagram, an astigmatism curve diagram, and a distortion curve diagram of the optical system of Embodiment 1;
  • FIG. 3 shows a schematic structural diagram of an optical system according to Embodiment 2 of the present application.
  • 4A to 4C are respectively a longitudinal spherical aberration curve diagram, an astigmatism curve diagram, and a distortion curve diagram of the optical system of Embodiment 2;
  • FIG. 5 shows a schematic structural diagram of an optical system according to Embodiment 3 of the present application.
  • 6A to 6C are respectively a longitudinal spherical aberration curve diagram, an astigmatism curve diagram, and a distortion curve diagram of the optical system of Embodiment 3;
  • FIG. 7 shows a schematic structural diagram of an optical system according to Embodiment 4 of the present application.
  • 8A to 8C are respectively a longitudinal spherical aberration curve diagram, an astigmatism curve diagram, and a distortion curve diagram of the optical system of Embodiment 4;
  • FIG. 9 shows a schematic structural diagram of an optical system according to Embodiment 5 of the present application.
  • 10A to 10C are longitudinal spherical aberration graphs, astigmatism graphs, and distortion graphs of the optical system of Example 5, respectively.
  • first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any restriction on the feature. Therefore, without departing from the teachings of the present application, the first lens discussed below may also be referred to as a second lens or a third lens.
  • the side of each lens in the optical system close to the object side is called the object side
  • the side close to the image side is called the image side.
  • the shape of the spherical or aspherical surface shown in the drawings is shown by way of example. That is, the shape of the spherical surface or the aspheric surface is not limited to the shape of the spherical surface or the aspheric surface shown in the drawings.
  • the drawings are only examples and are not drawn strictly to scale.
  • the traditional miniaturized lens has a small aperture while ensuring the image quality, so the low-light shooting ability is weak and cannot adapt to the shooting requirements of night scenes, rainy days, starry sky and other low-light environments.
  • Embodiments of the present application provide an optical system that can not only meet the requirements of miniaturization, but is also configured with a larger aperture and high image quality.
  • the optical system specifically includes seven lenses with refractive power, namely, the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, and the imaging on the image side of the seventh lens. surface.
  • the seven lenses are arranged in order from the object side to the image side along the optical axis.
  • the first lens has a positive refractive power, so that it can share the role of converging light with the second lens, so that the surface changes of the first lens and the second lens are relatively smooth, and excessive aberrations are avoided.
  • the object side surface of the first lens is convex on the optical axis, and the image side surface is concave on the optical axis, so that it is beneficial to converge the light rays in the sagittal and tangential directions to correct astigmatism.
  • the second lens has a positive refractive power, which can improve the light condensing ability of the optical system, so as to shorten the total length of the optical system and achieve miniaturization.
  • the object side surface of the second lens is convex at the optical axis, which is beneficial to enable the second lens to have sufficient light converging ability, thereby further shortening the total length of the optical system.
  • the third lens has a negative refractive power, which can effectively correct chromatic aberration and avoid image overlap due to shifting of imaging positions of different colors of light.
  • the object side surface of the third lens is convex on the optical axis, and the image side surface is concave on the optical axis, which is beneficial to compensate the aberrations generated by the second lens and improve the imaging quality.
  • the fifth lens has positive refractive power, and its image side surface is convex at the optical axis, which is beneficial to further correct the aberration of the optical system.
  • the seventh lens has a negative refractive power, so as to ensure the back focus of the optical system, which is beneficial to adapt the optical system to a thin and light electronic device.
  • the image side surface of the sixth lens is concave at the optical axis to further configure the back focal length of the optical system to ensure the miniaturization of the optical system.
  • the optical system satisfies the following relationship: TTL/ImgH ⁇ 1.3; where TTL is the distance from the object side of the first lens to the imaging surface of the optical system on the optical axis (that is, the total length of the optical system), and ImgH is the distance of the optical system Half of the diagonal length of the effective pixel area on the imaging surface.
  • TTL/ImgH can be 1.20, 1.22, 1.24, 1.26, or 1.28.
  • the light emitted or reflected by the subject enters the optical system from the object side, and passes through the first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the second lens in sequence.
  • the sixth lens and the seventh lens finally converge on the imaging surface.
  • the above-mentioned optical system can ensure that the total length of the optical system is small by reasonably distributing the optical power, surface shape and distance between each lens, so as to better meet the application requirements of light and thin electronic equipment; at the same time, it can also reduce The small aberration of the optical system ensures the imaging quality of the optical system.
  • the effective focal length of the optical system is f
  • the radius of curvature of the image side surface of the seventh lens at the optical axis is R14
  • the optical system satisfies the following relationship: 1.5 ⁇ f/R14 ⁇ 2.6.
  • f/R14 can be 1.65, 1.75, 1.85, 1.95, 2.05, 2.15, 2.25, 2.35, 2.45, or 2.55.
  • the aperture number (ie, F number) of the optical system is FNO, and the optical system satisfies the following relational expression: FNO ⁇ 1.9.
  • FNO can be 1.78, 1.80, 1.82, 1.84, 1.86, or 1.88.
  • the optical system can be made to have a larger effective aperture while ensuring that the optical system is miniaturized and the effective focal length remains unchanged.
  • the optical system has more light input. , Which can improve the low-light shooting performance of the lens and increase the sharpness of imaging to meet the shooting needs of dark-light scenes such as night scenes and starry sky.
  • the smaller the FNO the better the blurring effect of the optical system. Give users a better visual experience.
  • the effective focal length of the second lens is f2
  • the effective focal length of the optical system is f
  • the optical system satisfies the following relationship: 1 ⁇ f2/f ⁇ 1.7.
  • f2/f can be 1.15, 1.20, 1.25, 1.30, 1.35, 1.40, 1.45, 1.50, 1.55, 1.60 or 1.65.
  • it is convenient to optimize the effective focal length of the second lens which is beneficial to reduce the deflection angle of the light emitted from the optical system, and at the same time, it can also reduce the sensitivity of the second lens in the optical system.
  • the distance from the object side of the first lens to the imaging surface of the optical system on the optical axis is TTL
  • the distance from the image side of the third lens to the object side of the fourth lens on the optical axis is T34
  • the optical system satisfies The following relationship: 7 ⁇ TTL/T34 ⁇ 12.
  • TTL/T34 can be 7.5, 8.0, 8.5, 9.0, 9.5, 10.0, 10.5, 11.0, or 11.5.
  • the gap distance between the third lens and the fourth lens it is convenient to optimize the gap distance between the third lens and the fourth lens to effectively increase the exit angle of the light from the edge of the optical system (that is, the light exiting from the edge of the system and the imaging surface formed Cone angle) to brighten the periphery of the imaging surface and improve the relative brightness of the image.
  • the distance from the object side of the first lens to the imaging surface of the optical system on the optical axis is TTL
  • the effective focal length of the optical system is f
  • the optical system satisfies the following relationship: 1 ⁇ TTL/f ⁇ 1.3.
  • TTL/f can be 1.05, 1.08, 1.11, 1.14, 1.17, 1.20, or 1.23.
  • the total length of the optical system can be ensured to be small, and the effective focal length of the optical system can be optimized to achieve high-definition imaging performance; at the same time, if the total length of the optical system is determined, the effective focal length of the optical system is smaller, The larger the field of view, the optical system has wide-angle characteristics; the larger the effective focal length of the optical system, the smaller the field of view, and the optical system has telephoto characteristics.
  • the size of the optical system is too small, which will increase the sensitivity of the system, and is not conducive to the correction of aberrations; if the ratio is greater than or equal to 1.3, the size of the optical system is too large, causing the imaging surface The incident angle of the chief ray is too large, so that the light emitted from the edge of the system cannot be imaged in the effective pixel area, resulting in incomplete imaging information.
  • the radius of curvature of the object side surface of the sixth lens at the optical axis is R11
  • the radius of curvature of the image side surface of the sixth lens at the optical axis is R12
  • the optical system satisfies the following relationship: -50 ⁇ (R11+ R12)/(R11-R12) ⁇ 100.
  • (R11+R12)/(R11-R12) can be -45, -10, 5, 6, 7, 8, 10, 20, 30, 40, 50, 60, 70, or 80.
  • the sensitivity of the optical system can be reduced, and the assembly stability of the optical system can be improved.
  • the distance from the object side of the first lens to the imaging surface of the optical system on the optical axis is TTL
  • the distance from the seventh lens on the optical axis is CT7
  • the optical system satisfies the following relationship: 8 ⁇ TTL /CT7 ⁇ 15.
  • TTL/CT7 can be 8.5, 9.0, 9.5, 10.0, 10.5, 11.0, 11.5, 12.0, 12.5 or 13.0.
  • the machinability of the seventh lens can be guaranteed; at the same time, if the above ratio is too small, the size of the optical system is too small, and it is easy to increase the sensitivity of the optical system; if the above ratio is too large, the optical system The size of the system is too large, which is not conducive to imaging, and cannot meet the application requirements of thin and light electronic devices.
  • the optical system further includes an aperture stop
  • the aperture stop may be provided between the object side of the optical system and the first lens, or between the first lens and the seventh lens.
  • the aperture stop can also be located on the surface of any one of the first lens to the seventh lens (for example, the object side and the image side), and form an functional relationship with the lens, for example, by coating the surface of the lens. Cover the light-blocking coating to form an aperture stop on the surface; or fix the surface of the lens by a clamp.
  • the clamp structure on the surface can limit the width of the imaging beam of the object point on the axis, so as to be on the surface
  • An aperture stop is formed.
  • the diaphragm is located between the object side of the optical system and the first lens to effectively suppress the excessive increase of the incident angle of the chief ray, so that the chief ray better matches the photosensitive chip of the traditional specification.
  • the lens surface of each lens is aspherical, thereby improving the flexibility of lens design, effectively correcting aberrations, and improving the imaging resolution of the optical system.
  • the object side surface and the image side surface of each lens of the optical system may also be spherical surfaces. It should be noted that the above-mentioned embodiments are only examples of some embodiments of the present application. In some embodiments, the surface of each lens in the optical system may be aspherical or any combination of spherical surfaces.
  • the material of each lens in the optical system may be glass or plastic.
  • the plastic lens can reduce the weight and production cost of the optical system, while the glass lens can make the optical system have excellent performance. Optical performance and high temperature resistance characteristics. It should be noted that the material of each lens in the optical system can also be any combination of glass and plastic, and it does not have to be all glass or plastic.
  • the optical system further includes a filter for filtering infrared light and/or a protective glass for protecting the photosensitive element, wherein the photosensitive element is located on the imaging surface.
  • the imaging surface may be the photosensitive surface of the photosensitive element.
  • the optical system of the foregoing embodiment of the present application may use multiple lenses, for example, the seven lenses described above.
  • By reasonably distributing the focal length, refractive power, surface shape, thickness of each lens, and the on-axis distance between each lens it is possible to ensure that the total length of the above-mentioned optical system is small and has a large aperture (FNO can be 1.78), and it also has Higher imaging quality to better meet the adaptation needs of mobile phones, tablets and other light and thin electronic devices and the needs of low-light shooting.
  • FNO large aperture
  • the optical system is not limited to including seven lenses, and if necessary, the optical system may also include other numbers of lenses.
  • Embodiment 1 of the present application will be described below with reference to FIGS. 1 to 2C.
  • FIG. 1 shows a schematic diagram of the structure of the optical system of Embodiment 1.
  • the optical system includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, and a sixth lens L6 in order from the object side to the image side along the optical axis.
  • the first lens L1 has a positive refractive power.
  • the object side surface S1 is convex at the optical axis and convex at the circumference, and the image side S2 is concave at the optical axis and concave at the circumference.
  • the second lens L2 has a positive refractive power
  • the object side surface S3 is convex at the optical axis and the circumference is convex
  • the image side surface S4 is convex at the optical axis and the circumference is convex.
  • the third lens L3 has a negative refractive power.
  • the object side surface S5 is convex at the optical axis and concave at the circumference.
  • the image side surface S6 is concave at the optical axis and concave at the circumference.
  • the fourth lens L4 has a positive refractive power.
  • the object side surface S7 is convex at the optical axis and concave at the circumference.
  • the image side surface S8 is concave at the optical axis and convex at the circumference.
  • the fifth lens L5 has a positive refractive power.
  • the object side surface S9 is concave at the optical axis and concave at the circumference.
  • the image side surface S10 is convex at the optical axis and convex at the circumference.
  • the sixth lens L6 has a negative refractive power.
  • the object side surface S11 is convex at the optical axis and concave at the circumference.
  • the image side surface S12 is concave at the optical axis and convex at the circumference.
  • the seventh lens L7 has a negative refractive power.
  • the object side surface S13 is convex at the optical axis and convex at the circumference.
  • the image side surface S14 is concave at the optical axis and convex at the circumference.
  • the object side and image side of each lens of the first lens L1 to the sixth lens L7 are aspherical.
  • the design of the aspherical surface can solve the problem of distortion of the field of view, and can also make the lens smaller, thinner and flat. Realize excellent optical imaging effect, and make the optical system have miniaturization characteristics.
  • the materials of the first lens L1 to the seventh lens L7 are all plastic, and the plastic lens can reduce the weight of the optical system and at the same time reduce the production cost.
  • a stop STO is also provided between the object OBJ and the first lens L1 to further improve the imaging quality of the optical system.
  • the optical system further includes a filter L8 having an object side surface S15 and an image side surface S16.
  • the light from the object OBJ sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
  • the filter L8 is an infrared filter, which is used to filter the infrared light in the external light incident to the optical system to avoid imaging distortion.
  • the material of the infrared filter L8 is glass.
  • the infrared filter L8 may belong to a part of the optical system and be assembled with each lens, or may also be installed when the optical system and the photosensitive element are assembled.
  • Table 1 shows the surface type, radius of curvature, thickness, material, refractive index, Abbe number (ie dispersion coefficient) and effective focal length of each lens of the optical system of Example 1, where the radius of curvature, thickness, The unit of the effective focal length of each lens is millimeter (mm).
  • the reference wavelength is 555nm.
  • the aspheric surface type in each lens is defined by the following formula:
  • x is the distance vector height of the aspheric surface from the apex of the aspheric surface when the height is h along the optical axis direction;
  • k is the conic coefficient;
  • Ai is the i-th order coefficient of the aspheric surface.
  • Table 2 shows the high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18 and A20 that can be used for the lens aspheric surfaces S1-S10 in Example 1.
  • the half of the diagonal length ImgH of the effective pixel area on the imaging surface S17 of the optical system of this embodiment is 6.34mm. Therefore, in combination with the data in Table 1 and Table 2, it can be seen that the optical system in Embodiment 1 satisfies:
  • TTL/ImgH 1.24
  • TTL is the distance from the object side S1 of the first lens L1 to the imaging surface S17 of the optical system on the optical axis
  • ImgH is half of the diagonal length of the effective pixel area on the imaging surface S17 of the optical system
  • f/R14 2.41
  • f is the effective focal length of the optical system
  • R14 is the radius of curvature of the seventh lens L7 at the image side surface S14 at the optical axis
  • FNO 1.08
  • FNO is the aperture number of the optical system
  • f2/f 1.62
  • f2 is the effective focal length of the second lens L2
  • f is the effective focal length of the optical system
  • TTL/T34 8.02
  • TTL is the distance from the object side S1 of the first lens L1 to the imaging surface S17 of the optical system on the optical axis
  • T34 is the distance from the image side S6 of the third lens L3 to the object side S7 of the fourth lens L4 on the optical axis distance
  • TTL/f 1.15
  • TTL is the distance from the object side S1 of the first lens L1 to the imaging surface S17 of the optical system on the optical axis
  • f is the effective focal length of the optical system
  • R11 is the curvature radius of the sixth lens L6 on the optical axis of the object side S11
  • R12 is the curvature radius of the sixth lens L6 on the optical axis of the image side S12;
  • TTL/CT7 12.57
  • TTL is the distance from the object side S1 of the first lens L1 to the imaging surface S17 of the optical system on the optical axis
  • CT7 is the distance from the seventh lens L7 on the optical axis.
  • FIGS. 2A to 2C shows the longitudinal spherical aberration curve of the optical system of Example 1, which respectively indicate the deviation of the focal point of light with wavelengths of 470nm, 510nm, 555nm, 610nm, and 650nm after passing through the optical system;
  • FIG. 2B shows Example 1 The astigmatism curve of the optical system of, which represents the meridional field curvature and the sagittal field curvature;
  • FIG. 2C shows the distortion curve of the optical system of Example 1, which represents the distortion rate under different image heights. According to FIGS. 2A to 2C, it can be seen that the optical system given in Example 1 can achieve good imaging quality.
  • FIG. 3 shows a schematic structural diagram of the optical system of Embodiment 2 of the present application.
  • the optical system includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, and a sixth lens L6 in order from the object side to the image side along the optical axis. , The seventh lens L7 and the imaging surface S17.
  • the first lens L1 has a positive refractive power.
  • the object side surface S1 is convex at the optical axis and convex at the circumference, and the image side S2 is concave at the optical axis and concave at the circumference.
  • the second lens L2 has a positive refractive power
  • the object side surface S3 is convex at the optical axis and the circumference is convex
  • the image side surface S4 is convex at the optical axis and the circumference is convex.
  • the third lens L3 has a negative refractive power
  • the object side surface S5 is convex at the optical axis and convex at the circumference
  • the image side S6 is concave at the optical axis and concave at the circumference.
  • the fourth lens L4 has a positive refractive power.
  • the object side surface S7 is convex at the optical axis and concave at the circumference.
  • the image side surface S8 is convex at the optical axis and convex at the circumference.
  • the fifth lens L5 has a positive refractive power.
  • the object side surface S9 is concave at the optical axis and concave at the circumference.
  • the image side surface S10 is convex at the optical axis and convex at the circumference.
  • the sixth lens L6 has a negative refractive power.
  • the object side surface S11 is convex at the optical axis and concave at the circumference.
  • the image side surface S12 is concave at the optical axis and convex at the circumference.
  • the seventh lens L7 has a negative refractive power.
  • the object side surface S13 is concave at the optical axis and convex at the circumference.
  • the image side surface S14 is concave at the optical axis and convex at the circumference.
  • the object side and image side of each lens of the first lens L1 to the sixth lens L7 are aspherical.
  • the design of the aspherical surface can solve the problem of distortion of the field of view, and can also make the lens smaller, thinner and flat. Realize excellent optical imaging effect, and make the optical system have miniaturization characteristics.
  • the materials of the first lens L1 to the seventh lens L7 are all plastic.
  • the plastic lens can reduce the weight of the optical system and at the same time reduce the production cost.
  • a stop STO is also provided between the object OBJ and the first lens L1 to further improve the imaging quality of the optical system.
  • the optical system further includes a filter L8 having an object side surface S15 and an image side surface S16.
  • the light from the object OBJ sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
  • the filter L8 is an infrared filter, which is used to filter the infrared light in the external light incident to the optical system to avoid imaging distortion.
  • Table 3 shows the surface type, radius of curvature, thickness, material, refractive index, Abbe number, and effective focal length of each lens of the optical system of Example 2.
  • the radius of curvature, thickness, and effective focal length of each lens are The units are all millimeters (mm);
  • Table 4 shows the higher order term coefficients that can be used for the lens aspheric surfaces S1-S14 in Example 2, where the aspheric surface type can be defined by the formula (1) given in Example 1;
  • Table 5 shows the numerical values of the relevant parameters of the optical system given in Example 2.
  • the reference wavelength is 555nm.
  • FIGS. 4A to 4C shows the distortion curve of the optical system of Example 2, which represents the distortion rate under different image heights. It can be seen from FIGS. 4A to 4C that the optical system given in Embodiment 2 can achieve good imaging quality.
  • FIG. 5 shows a schematic structural diagram of an optical system according to Embodiment 3 of the present application.
  • the optical system includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, and a sixth lens L6 in order from the object side to the image side along the optical axis. , The seventh lens L7 and the imaging surface S17.
  • the first lens L1 has a positive refractive power.
  • the object side surface S1 is convex at the optical axis and convex at the circumference, and the image side S2 is concave at the optical axis and concave at the circumference.
  • the second lens L2 has a positive refractive power.
  • the object side surface S3 is convex at the optical axis and convex at the circumference, and the image side surface S4 is concave at the optical axis and convex at the circumference.
  • the third lens L3 has a negative refractive power
  • the object side surface S5 is convex at the optical axis and convex at the circumference
  • the image side S6 is concave at the optical axis and concave at the circumference.
  • the fourth lens L4 has a negative refractive power.
  • the object side surface S7 is convex at the optical axis and concave at the circumference.
  • the image side surface S8 is concave at the optical axis and convex at the circumference.
  • the fifth lens L5 has a positive refractive power.
  • the object side surface S9 is concave at the optical axis and concave at the circumference.
  • the image side surface S10 is convex at the optical axis and convex at the circumference.
  • the sixth lens L6 has a negative refractive power.
  • the object side surface S11 is convex at the optical axis and concave at the circumference.
  • the image side surface S12 is concave at the optical axis and convex at the circumference.
  • the seventh lens L7 has a negative refractive power.
  • the object side surface S13 is convex at the optical axis and convex at the circumference.
  • the image side surface S14 is concave at the optical axis and convex at the circumference.
  • the object side and image side of each lens of the first lens L1 to the sixth lens L7 are aspherical.
  • the design of the aspherical surface can solve the problem of distortion of the field of view, and can also make the lens smaller, thinner and flat. Realize excellent optical imaging effect, and make the optical system have miniaturization characteristics.
  • the materials of the first lens L1 to the seventh lens L7 are all plastic.
  • the plastic lens can reduce the weight of the optical system and at the same time reduce the production cost.
  • a stop STO is also provided between the object OBJ and the first lens L1 to further improve the imaging quality of the optical system.
  • the optical system further includes a filter L8 having an object side surface S15 and an image side surface S16.
  • the light from the object OBJ sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
  • the filter L8 is an infrared filter, which is used to filter the infrared light in the external light incident to the optical system to avoid imaging distortion.
  • Table 6 shows the surface type, radius of curvature, thickness, material, refractive index, Abbe number, and effective focal length of each lens of the optical system of Example 3.
  • the radius of curvature, thickness, and effective focal length of each lens are The units are all millimeters (mm);
  • Table 7 shows the higher order term coefficients that can be used for the lens aspheric surfaces S1-S14 in Embodiment 3, where the aspheric surface type can be defined by the formula (1) given in Embodiment 1;
  • Table 8 shows the numerical values of the relevant parameters of the optical system given in Example 3.
  • the reference wavelength is 555nm.
  • FIG. 6A shows the longitudinal spherical aberration curve of the optical system of Embodiment 3, which respectively indicate the deviation of the focusing point of light of different wavelengths after passing through the optical system
  • FIG. 6B shows the astigmatism curve of the optical system of Embodiment 3, which It represents meridional field curvature and sagittal field curvature
  • FIG. 6C shows the distortion curve of the optical system of Example 3, which represents the distortion rate under different image heights. It can be seen from FIGS. 6A to 6C that the optical system given in Embodiment 3 can achieve good imaging quality.
  • FIG. 7 shows a schematic structural diagram of an optical system according to Embodiment 4 of the present application.
  • the optical system includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, and a sixth lens L6 in order from the object side to the image side along the optical axis. , The seventh lens L7 and the imaging surface S17.
  • the first lens L1 has a positive refractive power.
  • the object side surface S1 is convex at the optical axis and convex at the circumference, and the image side S2 is concave at the optical axis and concave at the circumference.
  • the second lens L2 has a positive refractive power
  • the object side surface S3 is convex at the optical axis and the circumference is convex
  • the image side surface S4 is convex at the optical axis and the circumference is convex.
  • the third lens L3 has a negative refractive power
  • the object side surface S5 is convex at the optical axis and convex at the circumference
  • the image side S6 is concave at the optical axis and concave at the circumference.
  • the fourth lens L4 has a positive refractive power.
  • the object side surface S7 is concave at the optical axis and concave at the circumference.
  • the image side surface S8 is convex at the optical axis and convex at the circumference.
  • the fifth lens L5 has a positive refractive power.
  • the object side surface S9 is convex at the optical axis and concave at the circumference.
  • the image side surface S10 is convex at the optical axis and convex at the circumference.
  • the sixth lens L6 has a positive refractive power.
  • the object side surface S11 is convex at the optical axis and concave at the circumference.
  • the image side surface S12 is concave at the optical axis and convex at the circumference.
  • the seventh lens L7 has a negative refractive power.
  • the object side surface S13 is convex at the optical axis and convex at the circumference.
  • the image side surface S14 is concave at the optical axis and convex at the circumference.
  • the object side and image side of each lens of the first lens L1 to the sixth lens L7 are aspherical.
  • the design of the aspherical surface can solve the problem of distortion of the field of view, and can also make the lens smaller, thinner and flat. Realize excellent optical imaging effect, and make the optical system have miniaturization characteristics.
  • the materials of the first lens L1 to the seventh lens L7 are all plastic.
  • the plastic lens can reduce the weight of the optical system and at the same time reduce the production cost.
  • a stop STO is also provided between the object OBJ and the first lens L1 to further improve the imaging quality of the optical system.
  • the optical system further includes a filter L8 having an object side surface S15 and an image side surface S16.
  • the light from the object OBJ sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
  • the filter L8 is an infrared filter, which is used to filter the infrared light in the external light incident to the optical system to avoid imaging distortion.
  • Table 9 shows the surface type, radius of curvature, thickness, material, refractive index, Abbe number, and effective focal length of each lens of the optical system of Example 4. Among them, the ratio of the radius of curvature, thickness, and effective focal length of each lens The units are all millimeters (mm); Table 10 shows the higher order term coefficients that can be used for the lens aspheric surfaces S1-S14 in Example 4, where the aspheric surface type can be defined by the formula (1) given in Example 1; Table 11 shows the numerical values of the relevant parameters of the optical system given in Example 4.
  • the reference wavelength is 555nm.
  • Fig. 8A shows the longitudinal spherical aberration curve of the optical system of Example 4, which respectively indicate the deviation of the focusing point of light of different wavelengths after passing through the optical system
  • Fig. 8B shows the astigmatism curve of the optical system of Example 4, which Shows meridional field curvature and sagittal field curvature
  • FIG. 8C shows the distortion curve of the optical system of Example 4, which represents the distortion rate under different image heights. It can be seen from FIGS. 8A to 8C that the optical system given in Embodiment 4 can achieve good imaging quality.
  • FIG. 9 shows a schematic structural diagram of an optical system according to Embodiment 5 of the present application.
  • the optical system includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, and a sixth lens L6 in order from the object side to the image side along the optical axis. , The seventh lens L7 and the imaging surface S17.
  • the first lens L1 has a positive refractive power.
  • the object side surface S1 is convex at the optical axis and convex at the circumference, and the image side S2 is concave at the optical axis and concave at the circumference.
  • the second lens L2 has a positive refractive power
  • the object side surface S3 is convex at the optical axis and the circumference is convex
  • the image side surface S4 is convex at the optical axis and the circumference is convex.
  • the third lens L3 has a negative refractive power
  • the object side surface S5 is convex at the optical axis and convex at the circumference
  • the image side S6 is concave at the optical axis and concave at the circumference.
  • the fourth lens L4 has a negative refractive power.
  • the object side surface S7 is concave at the optical axis and concave at the circumference.
  • the image side surface S8 is concave at the optical axis and convex at the circumference.
  • the fifth lens L5 has a positive refractive power.
  • the object side surface S9 is convex at the optical axis and concave at the circumference.
  • the image side surface S10 is convex at the optical axis and convex at the circumference.
  • the sixth lens L6 has a positive refractive power.
  • the object side surface S11 is convex at the optical axis and concave at the circumference.
  • the image side surface S12 is concave at the optical axis and convex at the circumference.
  • the seventh lens L7 has a negative refractive power.
  • the object side surface S13 is convex at the optical axis and convex at the circumference.
  • the image side surface S14 is concave at the optical axis and convex at the circumference.
  • the object side and image side of each lens of the first lens L1 to the sixth lens L7 are aspherical.
  • the design of the aspherical surface can solve the problem of distortion of the field of view, and can also make the lens smaller, thinner and flat. Realize excellent optical imaging effect, and make the optical system have miniaturization characteristics.
  • the materials of the first lens L1 to the seventh lens L7 are all plastic.
  • the plastic lens can reduce the weight of the optical system and at the same time reduce the production cost.
  • a stop STO is also provided between the object OBJ and the first lens L1 to further improve the imaging quality of the optical system.
  • the optical system further includes a filter L8 having an object side surface S15 and an image side surface S16.
  • the light from the object OBJ sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
  • the filter L8 is an infrared filter, which is used to filter the infrared light in the external light incident to the optical system to avoid imaging distortion.
  • Table 12 shows the surface type, radius of curvature, thickness, material, refractive index, Abbe number, and effective focal length of each lens of the optical system of Example 5. Among them, the ratio of the radius of curvature, thickness, and effective focal length of each lens The units are all millimeters (mm); Table 13 shows the higher order term coefficients that can be used for the lens aspheric surfaces S1-S14 in Embodiment 5, where the aspheric surface type can be defined by the formula (1) given in Embodiment 1; Table 14 shows the values of the relevant parameters of the optical system given in Example 5.
  • the reference wavelength is 555nm.
  • FIGS. 10A to 10C shows the distortion curve of the optical system of Example 5, which represents the distortion rate under different image heights. According to FIGS. 10A to 10C, it can be seen that the optical system given in Embodiment 5 can achieve good imaging quality.
  • the present application also provides an image capturing device, including the optical system as described above; and a photosensitive element.
  • the photosensitive element is arranged on the image side of the optical system to receive the light carrying image information formed by the optical system.
  • the photosensitive element may adopt a complementary metal oxide semiconductor (CMOS, Complementary Metal Oxide Semiconductor) image sensor or a charge-coupled device (CCD, Charge-coupled Device) image sensor.
  • CMOS complementary metal oxide semiconductor
  • CCD Charge-coupled Device
  • the above-mentioned image capturing device can use the aforementioned optical system to capture clear and bright images even in low light conditions.
  • the image capturing device also has the characteristics of miniaturization, which is convenient to adapt to the limited size such as thin and light electronic equipment. Device.
  • the present application also provides an electronic device, including a housing and the image capturing device as described above.
  • the image capturing device is installed on the housing to capture images.
  • the image capturing device is arranged in the casing and exposed from the casing to capture images.
  • the casing can provide protection against dust, water, and drop of the image capturing device.
  • the casing is provided with a hole corresponding to the image capturing device. Make light penetrate into or out of the shell from the hole.
  • the above-mentioned electronic device has the characteristics of light and thin structure.
  • the image capturing device described above can be used to capture bright, defocused and high-definition images, which can meet the multi-scene shooting requirements of devices such as mobile phones and tablets.

Abstract

一种光学系统、取像装置和电子装置。光学系统沿着光轴由物侧至像侧依序包括：第一透镜（L1）、第二透镜（L2）、第三透镜（L3）、第四透镜（L4）、第五透镜（L5）、第六透镜（L6）和第七透镜（L7）；第一透镜（L1）具有正屈折力，其物侧面（S1）于光轴处为凸面，其像侧面（S2）于光轴处为凹面；第二透镜（L2）具有正屈折力，其物侧面（S3）于光轴处为凸面；第三透镜（L3）具有负屈折力，其物侧面（S5）于光轴处为凸面，其像侧面（S6）于光轴处为凹面；第五透镜（L5）具有正屈折力，其像侧面（S10）于光轴处为凸面；第七透镜（L7）具有负屈折力，其像侧面（S14）于光轴处为凹面；光学系统满足下列关系式：TTL/ImgH＜1.3；其中，TTL为第一透镜（L1）物侧面（S1）至光学系统的成像面（S17）在光轴上的距离，ImgH为光学系统的成像面（S17）上有效像素区域对角线长的一半。

Description

光学系统、取像装置及电子装置 技术领域
本申请涉及光学成像技术领域，特别是涉及一种光学系统、取像装置及电子装置。
背景技术
近年来，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，人们对于这些电子产品中镜头拍摄效果的改进创新愈发关注。其中，能够拍摄得到明亮、画质感强、清晰度高的图片的镜头越来越受到用户的青睐。另一方面，光电耦合器CCD及CMOS等感光元件伴随着科技进步像素尺寸越来越小，从而对相配套的光学系统的成像质量要求也越来越高。
然而，传统的小型化镜头，在保证成像清晰度的同时，其暗光拍摄能力较弱，无法满足如夜景、雨天、星空等暗光场景的拍摄需求。
发明内容
根据本申请的各种实施例，提供一种光学系统。
一种光学系统，沿着光轴由物侧至像侧依序包括：第一透镜、第二透镜、第三透镜、第四透镜、第五透镜、第六透镜和第七透镜，其中，
所述第一透镜具有正屈折力，且其物侧面于光轴处为凸面，其像侧面于光轴处为凹面；
所述第二透镜具有正屈折力，且其物侧面于光轴处为凸面；
所述第三透镜具有负屈折力，且其物侧面于光轴处为凸面，其像侧面于光轴处为凹面；
所述第五透镜具有正屈折力，且其像侧面于光轴处为凸面；
所述第七透镜具有负屈折力，且其像侧面于光轴处为凹面；
所述光学系统满足下列关系式：TTL/ImgH＜1.3；
其中，TTL为所述第一透镜物侧面至所述光学系统的成像面在光轴上的距离，ImgH为所述光学系统的成像面上有效像素区域对角线长的一半。
一种取像装置，包括上述实施例所述的光学系统；以及感光元件，所述感光元件设于所述光学系统的像侧。
一种电子装置，包括壳体以及上述实施例所述的取像装置，所述取像装置安装在所述壳体上。
本申请的一个或多个实施例的细节在下面的附图和描述中提出。本申 请的其他特征、目的和优点将从说明书、附图以及权利要求书变得明显。
附图说明
为了更好地描述和说明这里公开的那些发明的实施例或示例，可以参考一幅或多幅附图。用于描述附图的附加细节或示例不应当被认为是对所公开的发明、目前描述的实施例或示例以及目前理解的这些发明的最佳模式中的任何一者的范围的限制。
图1示出了本申请实施例1的光学系统的结构示意图；
图2A至图2C分别为实施例1的光学系统的纵向球差曲线图、像散曲线图以及畸变曲线图；
图3示出了本申请实施例2的光学系统的结构示意图；
图4A至图4C分别为实施例2的光学系统的纵向球差曲线图、像散曲线图以及畸变曲线图；
图5示出了本申请实施例3的光学系统的结构示意图；
图6A至图6C分别为实施例3的光学系统的纵向球差曲线图、像散曲线图以及畸变曲线图；
图7示出了本申请实施例4的光学系统的结构示意图；
图8A至图8C分别为实施例4的光学系统的纵向球差曲线图、像散曲线图以及畸变曲线图；
图9示出了本申请实施例5的光学系统的结构示意图；
图10A至图10C分别为实施例5的光学系统的纵向球差曲线图、像散曲线图以及畸变曲线图。
具体实施方式
为了使本申请的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本申请进行进一步详细说明。应当理解，此处描述的具体实施例仅仅用以解释本申请，并不用于限定本申请。
需要说明的是，当元件被称为“设置于”另一个元件，它可以直接在另一个元件上或者也可以存在居中的元件。当一个元件被认为是“连接”另一个元件，它可以是直接连接到另一个元件或者可能同时存在居中元件。本文所使用的术语“垂直的”、“水平的”、“左”、“右”以及类似的表述只是为了说明的目的，并不表示是唯一的实施方式。
应注意，在本说明书中，第一、第二、第三等的表述仅用于将一个特征与另一个特征区分开来，而不表示对特征的任何限制。因此，在不背离本申请的教导的情况下，下文中讨论的第一透镜也可被称作第二透镜或第三透镜。
需要指出的是，光学系统中各透镜靠近物侧的一面称为物侧面，靠近 像侧的一面称为像侧面。为了便于说明，附图中所示的球面或非球面的形状通过示例的方式示出。即，球面或非球面的形状不限于附图中示出的球面或非球面的形状。附图仅为示例而并非严格按比例绘制。
除非另有定义，本文所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同。本文中在本申请的说明书中所使用的术语只是为了描述具体的实施例的目的，不是旨在于限制本申请。本文所使用的术语“及/或”包括一个或多个相关的所列项目的任意的和所有的组合。
传统的小型化镜头在保证成像质量的同时，光圈较小，因此暗光拍摄能力较弱，无法适应夜景、雨天、星空等暗光环境的拍摄要求。
针对以上方案所存在的缺陷，均是发明人在经过实践并仔细研究后得到的结果，因此，上述问题的发现过程以及下文中本申请实施例针对上述问题所提出的解决方案，都应是发明人在本申请过程中对本申请做出的贡献。
以下将对本申请的特征、原理和其他方面进行详细描述。
请一并参阅图1、图3、图5、图7和图9，本申请实施例提供一种既能满足小型化的应用需求，又配置有较大光圈且成像质量高的光学系统。该光学系统具体包括七片具有屈折力的透镜，即第一透镜、第二透镜、第三透镜、第四透镜、第五透镜、第六透镜、第七透镜以及位于第七透镜像侧的成像面。该七片透镜沿着光轴从物侧至像侧依序排列。
第一透镜具有正屈折力，从而能与第二透镜共同承担汇聚光线的作用，进而使第一透镜与第二透镜的表面变化较为平缓，避免像差过大。第一透镜物侧面于光轴处为凸面，像侧面于光轴处为凹面，从而有利于使弧矢(Sagittal)方向与子午(Tangential)方向的光线聚合以修正像散。
第二透镜具有正屈折力，从而可提升光学系统的汇聚光线能力，以缩短光学系统的总长，实现小型化。第二透镜物侧面于光轴处为凸面，有利于使第二透镜具备足够的汇聚光线能力，从而进一步缩短光学系统的总长。
第三透镜具有负屈折力，从而可以有效修正色差，避免因不同色光成像位置偏移而产生影像重叠。第三透镜物侧面于光轴处为凸面，像侧面于光轴处为凹面，有利于补偿第二透镜产生的像差，提高成像品质。
第五透镜具有正屈折力，其像侧面于光轴处为凸面，有利于进一步修正光学系统的像差。
第七透镜具有负屈折力，从而能够保证光学系统的后焦距，有利于将光学系统适配至轻薄型的电子装置。第六透镜像侧面于光轴处为凹面，以进一步配置光学系统的后焦距从而保证光学系统的小型化。
具体的，光学系统满足下列关系式：TTL/ImgH＜1.3；其中，TTL为第一透镜物侧面至光学系统的成像面在光轴上的距离(即光学系统的总长)，ImgH为光学系统的成像面上有效像素区域对角线长的一半。TTL/ImgH可以是1.20、1.22、1.24、1.26或1.28。通过控制光学系统总长与光学系统 成像面的有效像素区域的对角距离满足上述关系，能保证光学系统的总长较小，满足小型化的应用需求。
当上述光学系统用于成像时，被摄物体发出或者反射的光线从物侧方向进入光学系统，并依次穿过第一透镜、第二透镜、第三透镜、第四透镜、第五透镜、第六透镜和第七透镜，最终汇聚到成像面上。
上述光学系统通过合理分配各透镜的光焦度、面型以及各透镜间的间距，以保证所述光学系统的总长较小，从而更好地满足轻薄型电子设备的应用需求；同时还可以减小光学系统的像差，保证光学系统的成像质量。
在示例性实施方式中，光学系统的有效焦距为f，第七透镜像侧面于光轴处的曲率半径为R14，光学系统满足下列关系式：1.5＜f/R14＜2.6。f/R14可以是1.65、1.75、1.85、1.95、2.05、2.15、2.25、2.35、2.45或2.55。在满足上述关系的条件下，有利于对第七透镜像侧面于光轴处曲率半径的取值进行优化，从而可以更好地匹配成像面上感光元件的内视场主光线入射角度，提高画面的中心亮度。
在示例性实施方式中，光学系统的光圈数(即F数)为FNO，光学系统满足下列关系式：FNO＜1.9。FNO可以是1.78、1.80、1.82、1.84、1.86或1.88。在满足上述关系的条件下，可以在保证光学系统小型化以及有效焦距不变的情况下，使光学系统具有较大的有效通光口径，相比于传统的小型化镜头具有更多的进光量，从而可以改善镜头的暗光拍摄性能，并提高成像的清晰度，满足如夜景、星空等暗光场景的拍摄需求；另外，FNO越小，表示光学系统还具备更佳的虚化效果，能够给用户带来更好的视觉体验。
在示例性实施方式中，第二透镜的有效焦距为f2，光学系统的有效焦距为f，光学系统满足下列关系式：1＜f2/f＜1.7。f2/f可以是1.15、1.20、1.25、1.30、1.35、1.40、1.45、1.50、1.55、1.60或1.65。在满足上述关系的条件下，方便对第二透镜的有效焦距进行优化，有利于降低从光学系统出射的光线的偏转角，同时也可以降低第二透镜在光学系统内的敏感度。
在示例性实施方式中，第一透镜物侧面至光学系统的成像面在光轴上的距离为TTL，第三透镜像侧面至第四透镜物侧面在光轴上的距离为T34，光学系统满足下列关系式：7＜TTL/T34＜12。TTL/T34可以是7.5、8.0、8.5、9.0、9.5、10.0、10.5、11.0或11.5。在满足上述关系的条件下，方便对第三透镜和第四透镜之间的间隙距离进行优化，以有效增加光学系统边缘视场光线的出射角(即从系统边缘出射的光线与成像面形成的锥角)，从而使成像面的周边变亮，提升图像的相对亮度。
在示例性实施方式中，第一透镜物侧面至光学系统的成像面在光轴上的距离为TTL，光学系统的有效焦距为f，光学系统满足下列关系式：1＜TTL/f＜1.3。TTL/f可以是1.05、1.08、1.11、1.14、1.17、1.20或1.23。在满足上述关系的条件下，可以保证光学系统的总长较小，并通过优化光 学系统的有效焦距以实现高清晰的成像性能；同时，若光学系统的总长确定，光学系统的有效焦距越小，则视场角越大，光学系统具备广角特性；光学系统的有效焦距越大，则视场角越小，光学系统具备远摄特性。另外若上述比值小于等于1，则光学系统的尺寸过小，会增加系统的敏感度，且不利于像差的修正；若上述比值大于等于1.3，则光学系统的尺寸过大，会使成像面上的主光线入射角过大，使得从系统边缘出射的光线无法成像在有效像素区域内，造成成像信息不全。
在示例性实施方式中，第六透镜物侧面于光轴处的曲率半径为R11，第六透镜像侧面于光轴处的曲率半径为R12，光学系统满足下列关系式：-50＜(R11+R12)/(R11-R12)＜100。(R11+R12)/(R11-R12)可以是-45、-10、5、6、7、8、10、20、30、40、50、60、70或80。在满足上述关系的条件下，方便对第六透镜物侧面和像侧面于光轴处的曲率半径进行调整，以适当增大成像面上的光线入射区域，满足光学系统的像高要求，同时还可以降低光学系统的敏感性，提高光学系统的组装稳定性。
在示例性实施方式中，第一透镜物侧面至光学系统的成像面在光轴上的距离为TTL，第七透镜在光轴上的的距离为CT7，光学系统满足下列关系式：8＜TTL/CT7＜15。TTL/CT7可以是8.5、9.0、9.5、10.0、10.5、11.0、11.5、12.0、12.5或13.0。在满足上述关系的条件下，可以保证第七透镜的可加工性；同时，若上述比值过小，则光学系统的尺寸过小，容易增加光学系统的敏感性；若上述比值过大，则光学系统的尺寸过大，不利于成像，且无法满足轻薄型电子设备的应用需求。
在示例性实施方式中，光学系统还包括孔径光阑，孔径光阑可以设于光学系统的物侧与第一透镜之间，或第一透镜与第七透镜之间。在另一些实施例中，孔径光阑也可位于第一透镜至第七透镜中任一透镜的表面上(例如物侧面和像侧面)，与透镜形成作用关系，例如，通过在透镜的表面涂覆阻光涂层以在该表面形成孔径光阑；或通过夹持件固定夹持透镜的表面，位于该表面的夹持件结构能够限制轴上物点成像光束的宽度，从而在该表面上形成孔径光阑。优选的，光阑位于光学系统的物侧与第一透镜之间，以有效抑制主光线入射角过度增大，使得主光线更好地与传统规格的感光芯片匹配。
在示例性实施方式中，第一透镜至第七透镜中，各透镜的透镜表面均为非球面，从而可以提高透镜设计的灵活性，并有效地校正像差，提升光学系统的成像解析度。在另一些实施例中，光学系统的各透镜的物侧面和像侧面也可以均为球面。需要注意的是，上述实施例仅是对本申请的一些实施例的举例，在一些实施例中，光学系统中各透镜的表面可以是非球面或球面的任意组合。
在示例性实施方式中，光学系统中各透镜的材质可以均为玻璃或均为塑料，塑料材质的透镜能够减少光学系统的重量并降低生产成本，而玻璃材质的透镜可使光学系统具备优良的光学性能以及较高的耐温的特性。需 要注意的是，光学系统中各透镜的材质也可以玻璃和塑料的任意组合，并不一定要是均为玻璃或均为塑料。
在示例性实施方式中，光学系统还包括用于滤除红外光线的滤光片和/或用于保护感光元件的保护玻璃，其中感光元件位于成像面上。进一步的，成像面可以为感光元件的感光表面。
本申请的上述实施方式的光学系统可采用多片镜片，例如上文所述的七片。通过合理分配各透镜焦距、屈折力、面型、厚度以及各透镜之间的轴上间距等，可以保证上述光学系统的总长较小且具有较大的光圈(FNO可以为1.78)，同时还具有较高的成像质量，以更好地满足手机、平板等轻薄型电子设备的适配需求和暗光拍摄需求。可以理解的是，虽然在实施方式中以七个透镜为例进行了描述，但是该光学系统不限于包括七个透镜，如果需要，该光学系统还可包括其它数量的透镜。
下面参照附图进一步描述可适用于上述实施方式的光学系统的具体实施例。
实施例1
以下参照图1至图2C描述本申请实施例1的光学系统。
图1示出了实施例1的光学系统的结构示意图。如图1所示，光学系统沿着光轴从物侧至像侧依序包括第一透镜L1、第二透镜L2、第三透镜L3、第四透镜L4、第五透镜L5、第六透镜L6、第七透镜L7和成像面S17。
第一透镜L1具有正屈折力，其物侧面S1于光轴处为凸面，于圆周处为凸面，像侧面S2于光轴处为凹面，于圆周处为凹面。
第二透镜L2具有正屈折力，其物侧面S3于光轴处为凸面，于圆周处为凸面，像侧面S4于光轴处为凸面，于圆周处为凸面。
第三透镜L3具有负屈折力，其物侧面S5于光轴处为凸面，于圆周处为凹面，像侧面S6于光轴处为凹面，于圆周处为凹面。
第四透镜L4具有正屈折力，其物侧面S7于光轴处为凸面，于圆周处为凹面，像侧面S8于光轴处为凹面，于圆周处为凸面。
第五透镜L5具有正屈折力，其物侧面S9于光轴处为凹面，于圆周处为凹面，像侧面S10于光轴处为凸面，于圆周处为凸面。
第六透镜L6具有负屈折力，其物侧面S11于光轴处为凸面，于圆周处为凹面，像侧面S12于光轴处为凹面，于圆周处为凸面。
第七透镜L7具有负屈折力，其物侧面S13于光轴处为凸面，于圆周处为凸面，像侧面S14于光轴处为凹面，于圆周处为凸面。
第一透镜L1至第六透镜L7的各透镜的物侧面及像侧面均为非球面，非球面的设计能够解决视界歪曲的问题，也能够使透镜在较小、较薄且较平的情况下实现优良的光学成像效果，进而使光学系统具备小型化特性。
第一透镜L1至第七透镜L7的材质均为塑料，塑料材质的透镜能够减少光学系统的重量，同时还能降低生产成本。
物体OBJ与第一透镜L1之间还设置有光阑STO，以进一步提升光学系 统的成像质量。
光学系统还包括具有物侧面S15和像侧面S16的滤光片L8。来自物体OBJ的光依序穿过各表面S1至S16并最终成像在成像面S17上。进一步的，滤光片L8为红外滤光片，用以滤除入射至光学系统的外界光线中的红外光线，避免成像失真。具体的，红外滤光片L8的材质为玻璃。红外滤光片L8可以属于光学系统的一部分，与各透镜一同装配，或者也可在光学系统与感光元件装配时一同安装。
表1示出了实施例1的光学系统的各透镜的表面类型、曲率半径、厚度、材质、折射率、阿贝数(即色散系数)和各透镜的有效焦距，其中，曲率半径、厚度、各透镜的有效焦距的单位均为毫米(mm)。参考波长为555nm。
表1
Figure PCTCN2019115349-appb-000001
各透镜中的非球面面型由以下公式限定：
Figure PCTCN2019115349-appb-000002
其中，x为非球面沿光轴方向在高度为h的位置时，距非球面顶点的距离矢高；c为非球面的近轴曲率，c＝1/R(即，近轴曲率c为表1中曲率半径R的倒数)；k为圆锥系数；Ai是非球面的第i阶系数。下表2给出了可用于实施例1中透镜非球面S1-S10的高次项系数A4、A6、A8、A10、A12、A14、A16、 A18和A20。
表2
Figure PCTCN2019115349-appb-000003
本实施例光学系统的成像面S17上有效像素区域对角线长的一半ImgH为6.34mm，因此结合表1和表2中的数据可知，实施例1中的光学系统满足：
TTL/ImgH＝1.24，TTL为第一透镜L1物侧面S1至光学系统的成像面S17在光轴上的距离，ImgH为光学系统的成像面S17上有效像素区域对角线长的一半；
f/R14＝2.41，f为光学系统的有效焦距，R14为第七透镜L7像侧面S14于光轴处的曲率半径；
FNO＝1.88，FNO为光学系统的光圈数；
f2/f＝1.62，f2为第二透镜L2的有效焦距，f为光学系统的有效焦距；
TTL/T34＝8.02，TTL为第一透镜L1物侧面S1至光学系统的成像面S17在光轴上的距离，T34为第三透镜L3像侧面S6至第四透镜L4物侧面S7在光轴上的距离；
TTL/f＝1.15，TTL为第一透镜L1物侧面S1至光学系统的成像面S17在光轴上的距离，f为光学系统的有效焦距；
(R11+R12)/(R11-R12)＝5.48，R11为第六透镜L6物侧面S11于光轴处的曲率半径，R12为第六透镜L6像侧面S12于光轴处的曲率半径；
TTL/CT7＝12.57，TTL为第一透镜L1物侧面S1至光学系统的成像面S17在光轴上的距离，CT7为第七透镜L7在光轴上的的距离。
图2A示出了实施例1的光学系统的纵向球差曲线，其分别表示波长为470nm、510nm、555nm、610nm以及650nm的光线经由光学系统后的会聚焦点偏离；图2B示出了实施例1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2C示出了实施例1的光学系统的畸变曲线，其表示不同像高情况下的畸变率。根据图2A至图2C可知，实施例1给出的光学系统能够实现良好的成像品质。
实施例2
以下参照图3至图4C描述本申请实施例2的光学系统。在本实施例中，为简洁起见，将省略部分与实施例1相似的描述。图3示出了本申请实施例2的光学系统的结构示意图。
如图3所示，光学系统沿着光轴从物侧至像侧依序包括第一透镜L1、第二透镜L2、第三透镜L3、第四透镜L4、第五透镜L5、第六透镜L6、第七透镜L7和成像面S17。
第一透镜L1具有正屈折力，其物侧面S1于光轴处为凸面，于圆周处为凸面，像侧面S2于光轴处为凹面，于圆周处为凹面。
第二透镜L2具有正屈折力，其物侧面S3于光轴处为凸面，于圆周处为凸面，像侧面S4于光轴处为凸面，于圆周处为凸面。
第三透镜L3具有负屈折力，其物侧面S5于光轴处为凸面，于圆周处为凸面，像侧面S6于光轴处为凹面，于圆周处为凹面。
第四透镜L4具有正屈折力，其物侧面S7于光轴处为凸面，于圆周处为凹面，像侧面S8于光轴处为凸面，于圆周处为凸面。
第五透镜L5具有正屈折力，其物侧面S9于光轴处为凹面，于圆周处为凹面，像侧面S10于光轴处为凸面，于圆周处为凸面。
第六透镜L6具有负屈折力，其物侧面S11于光轴处为凸面，于圆周处为凹面，像侧面S12于光轴处为凹面，于圆周处为凸面。
第七透镜L7具有负屈折力，其物侧面S13于光轴处为凹面，于圆周处为凸面，像侧面S14于光轴处为凹面，于圆周处为凸面。
第一透镜L1至第六透镜L7的各透镜的物侧面及像侧面均为非球面，非球面的设计能够解决视界歪曲的问题，也能够使透镜在较小、较薄且较 平的情况下实现优良的光学成像效果，进而使光学系统具备小型化特性。
第一透镜L1至第七透镜L7的材质均为塑料，塑料材质的透镜能够减少光学系统的重量，同时还能降低生产成本。
物体OBJ与第一透镜L1之间还设置有光阑STO，以进一步提升光学系统的成像质量。光学系统还包括具有物侧面S15和像侧面S16的滤光片L8。来自物体OBJ的光依序穿过各表面S1至S16并最终成像在成像面S17上。进一步的，滤光片L8为红外滤光片，用以滤除入射至光学系统的外界光线中的红外光线，避免成像失真。
表3示出了实施例2的光学系统各透镜的表面类型、曲率半径、厚度、材质、折射率、阿贝数及各透镜的有效焦距，其中，曲率半径、厚度、各透镜的有效焦距的单位均为毫米(mm)；表4示出了可用于实施例2中透镜非球面S1-S14的高次项系数，其中非球面面型可由实施例1中给出的公式(1)限定；表5示出了实施例2中给出的光学系统的相关参数的数值。参考波长为555nm。
表3
Figure PCTCN2019115349-appb-000004
表4
Figure PCTCN2019115349-appb-000005
Figure PCTCN2019115349-appb-000006
表5
f(mm) 6.83 f/R14 1.74
FNO 1.88 f2/f 1.55
FOV(度) 84.9 TTL/T34 11.19
ImgH(mm) 6.34 TTL/f 1.15
TTL(mm) 7.83 (R11+R12)/(R11-R12) 7.88
TTL/ImgH 1.24 TTL/CT7 11.93
图4A示出了实施例2的光学系统的纵向球差曲线，其分别表示不同波长的光线经由光学系统后的会聚焦点偏离；图4B示出了实施例2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4C示出了实施例2的光学系统的畸变曲线，其表示不同像高情况下的畸变率。根据图4A至图4C可知，实施例2给出的光学系统能够实现良好的成像品质。
实施例3
以下参照图5至图6C描述本申请实施例3的光学系统。在本实施例中， 为简洁起见，将省略部分与实施例1相似的描述。图5示出了本申请实施例3的光学系统的结构示意图。
如图5所示，光学系统沿着光轴从物侧至像侧依序包括第一透镜L1、第二透镜L2、第三透镜L3、第四透镜L4、第五透镜L5、第六透镜L6、第七透镜L7和成像面S17。
第一透镜L1具有正屈折力，其物侧面S1于光轴处为凸面，于圆周处为凸面，像侧面S2于光轴处为凹面，于圆周处为凹面。
第二透镜L2具有正屈折力，其物侧面S3于光轴处为凸面，于圆周处为凸面，像侧面S4于光轴处为凹面，于圆周处为凸面。
第三透镜L3具有负屈折力，其物侧面S5于光轴处为凸面，于圆周处为凸面，像侧面S6于光轴处为凹面，于圆周处为凹面。
第四透镜L4具有负屈折力，其物侧面S7于光轴处为凸面，于圆周处为凹面，像侧面S8于光轴处为凹面，于圆周处为凸面。
第五透镜L5具有正屈折力，其物侧面S9于光轴处为凹面，于圆周处为凹面，像侧面S10于光轴处为凸面，于圆周处为凸面。
第六透镜L6具有负屈折力，其物侧面S11于光轴处为凸面，于圆周处为凹面，像侧面S12于光轴处为凹面，于圆周处为凸面。
第七透镜L7具有负屈折力，其物侧面S13于光轴处为凸面，于圆周处为凸面，像侧面S14于光轴处为凹面，于圆周处为凸面。
第一透镜L1至第六透镜L7的各透镜的物侧面及像侧面均为非球面，非球面的设计能够解决视界歪曲的问题，也能够使透镜在较小、较薄且较平的情况下实现优良的光学成像效果，进而使光学系统具备小型化特性。
第一透镜L1至第七透镜L7的材质均为塑料，塑料材质的透镜能够减少光学系统的重量，同时还能降低生产成本。
物体OBJ与第一透镜L1之间还设置有光阑STO，以进一步提升光学系统的成像质量。光学系统还包括具有物侧面S15和像侧面S16的滤光片L8。来自物体OBJ的光依序穿过各表面S1至S16并最终成像在成像面S17上。进一步的，滤光片L8为红外滤光片，用以滤除入射至光学系统的外界光线中的红外光线，避免成像失真。
表6示出了实施例3的光学系统各透镜的表面类型、曲率半径、厚度、材质、折射率、阿贝数及各透镜的有效焦距，其中，曲率半径、厚度、各透镜的有效焦距的单位均为毫米(mm)；表7示出了可用于实施例3中透镜非球面S1-S14的高次项系数，其中非球面面型可由实施例1中给出的公式(1)限定；表8示出了实施例3中给出的光学系统的相关参数的数值。参考波长为555nm。
表6
Figure PCTCN2019115349-appb-000007
Figure PCTCN2019115349-appb-000008
表7
Figure PCTCN2019115349-appb-000009
Figure PCTCN2019115349-appb-000010
表8
f(mm) 6.79 f/R14 2.42
FNO 1.88 f2/f 1.18
FOV(度) 84.8 TTL/T34 8.35
ImgH(mm) 6.34 TTL/f 1.19
TTL(mm) 8.1 (R11+R12)/(R11-R12) 6.88
TTL/ImgH 1.28 TTL/CT7 9.43
图6A示出了实施例3的光学系统的纵向球差曲线，其分别表示不同波长的光线经由光学系统后的会聚焦点偏离；图6B示出了实施例3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6C示出了实施例3的光学系统的畸变曲线，其表示不同像高情况下的畸变率。根据图6A至图6C可知，实施例3给出的光学系统能够实现良好的成像品质。
实施例4
以下参照图7至图8C描述本申请实施例4的光学系统。在本实施例中，为简洁起见，将省略部分与实施例1相似的描述。图7示出了本申请实施例4的光学系统的结构示意图。
如图7所示，光学系统沿着光轴从物侧至像侧依序包括第一透镜L1、第二透镜L2、第三透镜L3、第四透镜L4、第五透镜L5、第六透镜L6、第七透镜L7和成像面S17。
第一透镜L1具有正屈折力，其物侧面S1于光轴处为凸面，于圆周处为凸面，像侧面S2于光轴处为凹面，于圆周处为凹面。
第二透镜L2具有正屈折力，其物侧面S3于光轴处为凸面，于圆周处为凸面，像侧面S4于光轴处为凸面，于圆周处为凸面。
第三透镜L3具有负屈折力，其物侧面S5于光轴处为凸面，于圆周处为凸面，像侧面S6于光轴处为凹面，于圆周处为凹面。
第四透镜L4具有正屈折力，其物侧面S7于光轴处为凹面，于圆周处为凹面，像侧面S8于光轴处为凸面，于圆周处为凸面。
第五透镜L5具有正屈折力，其物侧面S9于光轴处为凸面，于圆周处为凹面，像侧面S10于光轴处为凸面，于圆周处为凸面。
第六透镜L6具有正屈折力，其物侧面S11于光轴处为凸面，于圆周处 为凹面，像侧面S12于光轴处为凹面，于圆周处为凸面。
第七透镜L7具有负屈折力，其物侧面S13于光轴处为凸面，于圆周处为凸面，像侧面S14于光轴处为凹面，于圆周处为凸面。
第一透镜L1至第六透镜L7的各透镜的物侧面及像侧面均为非球面，非球面的设计能够解决视界歪曲的问题，也能够使透镜在较小、较薄且较平的情况下实现优良的光学成像效果，进而使光学系统具备小型化特性。
第一透镜L1至第七透镜L7的材质均为塑料，塑料材质的透镜能够减少光学系统的重量，同时还能降低生产成本。
物体OBJ与第一透镜L1之间还设置有光阑STO，以进一步提升光学系统的成像质量。光学系统还包括具有物侧面S15和像侧面S16的滤光片L8。来自物体OBJ的光依序穿过各表面S1至S16并最终成像在成像面S17上。进一步的，滤光片L8为红外滤光片，用以滤除入射至光学系统的外界光线中的红外光线，避免成像失真。
表9示出了实施例4的光学系统各透镜的表面类型、曲率半径、厚度、材质、折射率、阿贝数及各透镜的有效焦距，其中，曲率半径、厚度、各透镜的有效焦距的单位均为毫米(mm)；表10示出了可用于实施例4中透镜非球面S1-S14的高次项系数，其中非球面面型可由实施例1中给出的公式(1)限定；表11示出了实施例4中给出的光学系统的相关参数的数值。参考波长为555nm。
表9
Figure PCTCN2019115349-appb-000011
Figure PCTCN2019115349-appb-000012
表10
Figure PCTCN2019115349-appb-000013
表11
f(mm) 6.78 f/R14 2.39
FNO 1.88 f2/f 1.15
FOV(度) 84.9 TTL/T34 9.73
ImgH(mm) 6.34 TTL/f 1.19
TTL(mm) 8.1 (R11+R12)/(R11-R12) 80.72
TTL/ImgH 1.28 TTL/CT7 10.24
图8A示出了实施例4的光学系统的纵向球差曲线，其分别表示不同波长的光线经由光学系统后的会聚焦点偏离；图8B示出了实施例4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8C示出了实施例4的光学系统的畸变曲线，其表示不同像高情况下的畸变率。根据图8A至图8C可知，实施例4给出的光学系统能够实现良好的成像品质。
实施例5
以下参照图9至图10C描述本申请实施例5的光学系统。在本实施例中，为简洁起见，将省略部分与实施例1相似的描述。图9示出了本申请实施例5的光学系统的结构示意图。
如图9所示，光学系统沿着光轴从物侧至像侧依序包括第一透镜L1、第二透镜L2、第三透镜L3、第四透镜L4、第五透镜L5、第六透镜L6、第七透镜L7和成像面S17。
第一透镜L1具有正屈折力，其物侧面S1于光轴处为凸面，于圆周处为凸面，像侧面S2于光轴处为凹面，于圆周处为凹面。
第二透镜L2具有正屈折力，其物侧面S3于光轴处为凸面，于圆周处为凸面，像侧面S4于光轴处为凸面，于圆周处为凸面。
第三透镜L3具有负屈折力，其物侧面S5于光轴处为凸面，于圆周处为凸面，像侧面S6于光轴处为凹面，于圆周处为凹面。
第四透镜L4具有负屈折力，其物侧面S7于光轴处为凹面，于圆周处为凹面，像侧面S8于光轴处为凹面，于圆周处为凸面。
第五透镜L5具有正屈折力，其物侧面S9于光轴处为凸面，于圆周处为凹面，像侧面S10于光轴处为凸面，于圆周处为凸面。
第六透镜L6具有正屈折力，其物侧面S11于光轴处为凸面，于圆周处为凹面，像侧面S12于光轴处为凹面，于圆周处为凸面。
第七透镜L7具有负屈折力，其物侧面S13于光轴处为凸面，于圆周处为凸面，像侧面S14于光轴处为凹面，于圆周处为凸面。
第一透镜L1至第六透镜L7的各透镜的物侧面及像侧面均为非球面，非球面的设计能够解决视界歪曲的问题，也能够使透镜在较小、较薄且较平的情况下实现优良的光学成像效果，进而使光学系统具备小型化特性。
第一透镜L1至第七透镜L7的材质均为塑料，塑料材质的透镜能够减少光学系统的重量，同时还能降低生产成本。
物体OBJ与第一透镜L1之间还设置有光阑STO，以进一步提升光学系统的成像质量。光学系统还包括具有物侧面S15和像侧面S16的滤光片L8。来自物体OBJ的光依序穿过各表面S1至S16并最终成像在成像面S17上。进一步的，滤光片L8为红外滤光片，用以滤除入射至光学系统的外界光线中的红外光线，避免成像失真。
表12示出了实施例5的光学系统各透镜的表面类型、曲率半径、厚度、材质、折射率、阿贝数及各透镜的有效焦距，其中，曲率半径、厚度、各透镜的有效焦距的单位均为毫米(mm)；表13示出了可用于实施例5中透 镜非球面S1-S14的高次项系数，其中非球面面型可由实施例1中给出的公式(1)限定；表14示出了实施例5中给出的光学系统的相关参数的数值。参考波长为555nm。
表12
Figure PCTCN2019115349-appb-000014
表13
Figure PCTCN2019115349-appb-000015
Figure PCTCN2019115349-appb-000016
表14
f(mm) 6.78 f/R14 2.56
FNO 1.78 f2/f 1.15
FOV(度) 84.9 TTL/T34 10.86
ImgH(mm) 6.34 TTL/f 1.19
TTL(mm) 8.1 (R11+R12)/(R11-R12) -43.45
TTL/ImgH 1.28 TTL/CT7 11.65
图10A示出了实施例5的光学系统的纵向球差曲线，其分别表示不同波长的光线经由光学系统后的会聚焦点偏离；图10B示出了实施例5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10C示出了实施例5的光学系统的畸变曲线，其表示不同像高情况下的畸变率。根据图10A至图10C可知，实施例5给出的光学系统能够实现良好的成像品质。
本申请还提供一种取像装置，包括如前文所述的光学系统；以及感光元件，感光元件设于光学系统的像侧，以接收由光学系统形成的携带图像信息的光。具体的，感光元件可以采用互补金属氧化物半导体(CMOS，Complementary Metal Oxide Semiconductor)图像传感器或者电荷耦合元件(CCD,Charge-coupled Device)图像传感器。
上述取像装置，利用前述光学系统即使在暗光条件下也能拍摄得到清晰明亮的图像，同时该取像装置还具有小型化的特点，方便适配至如轻薄型电子设备等尺寸受限的装置。
本申请还提供一种电子装置，包括壳体以及如前文所述的取像装置，取像装置安装在所述壳体上，用以获取图像。
具体的，取像装置设置在壳体内并从壳体暴露以获取图像，壳体可以给取像装置提供防尘、防水防摔等保护，壳体上开设有与取像装置对应的 孔，以使光线从孔中穿入或穿出壳体。
上述电子装置，具有轻薄化的结构特点，利用如前所述的取像装置可以拍摄得到明亮、虚化效果好且清晰度高的图像，满足如手机、平板等设备的多场景拍摄需求。
以上所述实施例的各技术特征可以进行任意的组合，为使描述简洁，未对上述实施例中的各个技术特征所有可能的组合都进行描述，然而，只要这些技术特征的组合不存在矛盾，都应当认为是本说明书记载的范围。
以上所述实施例仅表达了本发明的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对发明专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干变形和改进，这些都属于本发明的保护范围。因此，本发明专利的保护范围应以所附权利要求为准。
以上所述实施例的各技术特征可以进行任意的组合，为使描述简洁，未对上述实施例中的各个技术特征所有可能的组合都进行描述，然而，只要这些技术特征的组合不存在矛盾，都应当认为是本说明书记载的范围。
以上所述实施例仅表达了本申请的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本申请构思的前提下，还可以做出若干变形和改进，这些都属于本申请的保护范围。因此，本申请的保护范围应以所附权利要求为准。

Claims (10)

  1. 一种光学系统，沿着光轴由物侧至像侧依序包括：第一透镜、第二透镜、第三透镜、第四透镜、第五透镜、第六透镜和第七透镜，其特征在于，
    所述第一透镜具有正屈折力，且其物侧面于光轴处为凸面，其像侧面于光轴处为凹面；
    所述第二透镜具有正屈折力，且其物侧面于光轴处为凸面；
    所述第三透镜具有负屈折力，且其物侧面于光轴处为凸面，其像侧面于光轴处为凹面；
    所述第五透镜具有正屈折力，且其像侧面于光轴处为凸面；
    所述第七透镜具有负屈折力，且其像侧面于光轴处为凹面；
    所述光学系统满足下列关系式：
    TTL/ImgH＜1.3；
    其中，TTL为所述第一透镜物侧面至所述光学系统的成像面在光轴上的距离，ImgH为所述光学系统的成像面上有效像素区域对角线长的一半。
  2. 根据权利要求1所述的光学系统，其特征在于，所述光学系统满足下列关系式：
    1.5＜f/R14＜2.6；
    其中，f为所述光学系统的有效焦距，R14为所述第七透镜像侧面于光轴处的曲率半径。
  3. 根据权利要求1所述的光学系统，其特征在于，所述光学系统满足下列关系式：
    FNO＜1.9；
    其中，FNO为所述光学系统的光圈数。
  4. 根据权利要求1所述的光学系统，其特征在于，所述光学系统满足下列关系式：
    1＜f2/f＜1.7；
    其中，f2为所述第二透镜的有效焦距，f为所述光学系统的有效焦距。
  5. 根据权利要求1所述的光学系统，其特征在于，所述光学系统满足下列关系式：
    7＜TTL/T34＜12；
    其中，TTL为所述第一透镜物侧面至所述光学系统的成像面在光轴上的距离，T34为所述第三透镜像侧面至所述第四透镜物侧面在光轴上的距离。
  6. 根据权利要求1所述的光学系统，其特征在于，所述光学系统满足下列关系式：
    1＜TTL/f＜1.3；
    其中，TTL为所述第一透镜物侧面至所述光学系统的成像面在光轴上 的距离，f为所述光学系统的有效焦距。
  7. 根据权利要求1所述的光学系统，其特征在于，所述光学系统满足下列关系式：
    -50＜(R11+R12)/(R11-R12)＜100；
    其中，R11为所述第六透镜物侧面于光轴处的曲率半径，R12为所述第六透镜像侧面于光轴处的曲率半径。
  8. 根据权利要求1所述的光学系统，其特征在于，所述光学系统满足下列关系式：
    8＜TTL/CT7＜15；
    其中，TTL为所述第一透镜物侧面至所述光学系统的成像面在光轴上的距离，CT7为所述第七透镜在光轴上的的距离。
  9. 一种取像装置，其特征在于，包括：
    如权利要求1-8任一项所述的光学系统；以及，
    感光元件，所述感光元件设于所述光学系统的像侧。
  10. 一种电子装置，其特征在于，包括：
    壳体；以及，
    如权利要求9所述的取像装置，所述取像装置安装在所述壳体上。
PCT/CN2019/115349 2019-11-04 2019-11-04 光学系统、取像装置及电子装置 WO2021087669A1 (zh)

Priority Applications (3)

Application Number Priority Date Filing Date Title
PCT/CN2019/115349 WO2021087669A1 (zh) 2019-11-04 2019-11-04 光学系统、取像装置及电子装置
US17/606,005 US20220206260A1 (en) 2019-11-04 2019-11-04 Optical system, image capturing apparatus and electronic apparatus
EP19952099.0A EP3896510A4 (en) 2019-11-04 2019-11-04 OPTICAL SYSTEM, IMAGE CAPTURE DEVICE AND ELECTRONIC DEVICE

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2019/115349 WO2021087669A1 (zh) 2019-11-04 2019-11-04 光学系统、取像装置及电子装置

Publications (1)

Publication Number Publication Date
WO2021087669A1 true WO2021087669A1 (zh) 2021-05-14

Family

ID=75848617

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2019/115349 WO2021087669A1 (zh) 2019-11-04 2019-11-04 光学系统、取像装置及电子装置

Country Status (3)

Country Link
US (1) US20220206260A1 (zh)
EP (1) EP3896510A4 (zh)
WO (1) WO2021087669A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11953756B2 (en) 2019-08-15 2024-04-09 Jiangxi Ofilm Optical Co., Ltd. Optical system, image capturing module and electronic device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117233932B (zh) * 2023-11-10 2024-02-20 江西联益光学有限公司 光学镜头

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015159721A1 (ja) * 2014-04-15 2015-10-22 株式会社オプトロジック 撮像レンズ
CN106842512A (zh) * 2017-04-17 2017-06-13 浙江舜宇光学有限公司 摄像镜头
CN106896474A (zh) * 2016-12-30 2017-06-27 玉晶光电(厦门)有限公司 光学镜片组
CN107102425A (zh) * 2017-07-06 2017-08-29 浙江舜宇光学有限公司 光学成像镜头
CN108089317A (zh) * 2018-02-05 2018-05-29 浙江舜宇光学有限公司 光学成像镜头
TWI640811B (zh) * 2017-06-16 2018-11-11 大立光電股份有限公司 攝像系統鏡片組、取像裝置及電子裝置
CN109283665A (zh) * 2018-12-07 2019-01-29 浙江舜宇光学有限公司 成像镜头
TWI655474B (zh) * 2017-12-22 2019-04-01 大立光電股份有限公司 取像用光學鏡頭、取像裝置及電子裝置
CN110398815A (zh) * 2019-06-29 2019-11-01 瑞声科技(新加坡)有限公司 摄像光学镜头
CN110618522A (zh) * 2019-10-29 2019-12-27 浙江舜宇光学有限公司 摄像透镜组

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6133068B2 (ja) * 2013-01-30 2017-05-24 カンタツ株式会社 撮像レンズ
JP6849350B2 (ja) * 2016-09-05 2021-03-24 キヤノン株式会社 光学系およびそれを有する光学機器
US10942336B2 (en) * 2017-04-17 2021-03-09 Zhejiang Sunny Optical Co., Ltd Camera lens assembly
WO2019007045A1 (zh) * 2017-07-06 2019-01-10 浙江舜宇光学有限公司 光学成像镜头

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015159721A1 (ja) * 2014-04-15 2015-10-22 株式会社オプトロジック 撮像レンズ
CN106896474A (zh) * 2016-12-30 2017-06-27 玉晶光电(厦门)有限公司 光学镜片组
CN106842512A (zh) * 2017-04-17 2017-06-13 浙江舜宇光学有限公司 摄像镜头
TWI640811B (zh) * 2017-06-16 2018-11-11 大立光電股份有限公司 攝像系統鏡片組、取像裝置及電子裝置
CN107102425A (zh) * 2017-07-06 2017-08-29 浙江舜宇光学有限公司 光学成像镜头
TWI655474B (zh) * 2017-12-22 2019-04-01 大立光電股份有限公司 取像用光學鏡頭、取像裝置及電子裝置
CN108089317A (zh) * 2018-02-05 2018-05-29 浙江舜宇光学有限公司 光学成像镜头
CN109283665A (zh) * 2018-12-07 2019-01-29 浙江舜宇光学有限公司 成像镜头
CN110398815A (zh) * 2019-06-29 2019-11-01 瑞声科技(新加坡)有限公司 摄像光学镜头
CN110618522A (zh) * 2019-10-29 2019-12-27 浙江舜宇光学有限公司 摄像透镜组

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP3896510A4 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11953756B2 (en) 2019-08-15 2024-04-09 Jiangxi Ofilm Optical Co., Ltd. Optical system, image capturing module and electronic device

Also Published As

Publication number Publication date
EP3896510A1 (en) 2021-10-20
US20220206260A1 (en) 2022-06-30
EP3896510A4 (en) 2022-08-10

Similar Documents

Publication Publication Date Title
CN109164560B (zh) 成像镜头
CN108594407B (zh) 摄像镜头
WO2019169853A1 (zh) 光学成像镜头
CN108761730B (zh) 摄像镜头
WO2018153012A1 (zh) 摄像镜头
WO2020191951A1 (zh) 光学成像镜头
WO2018192126A1 (zh) 摄像镜头
WO2021184165A1 (zh) 光学系统、摄像模组及电子装置
WO2020164247A1 (zh) 光学成像系统
WO2019233142A1 (zh) 光学成像镜头
CN113805310B (zh) 光学系统、取像模组及电子设备
WO2020098328A1 (zh) 摄像镜头
WO2021042954A1 (zh) 摄像镜头组
WO2020134027A1 (zh) 光学成像镜头
WO2019233149A1 (zh) 摄影镜头
WO2020107934A1 (zh) 光学透镜组
WO2019024490A1 (zh) 光学成像镜头
WO2020088024A1 (zh) 光学成像镜头
CN110596865A (zh) 摄像镜头组
WO2019037420A1 (zh) 摄像透镜组
CN113391430A (zh) 光学系统、镜头模组和电子设备
WO2022266902A1 (zh) 光学镜头、摄像模组及电子设备
WO2021087669A1 (zh) 光学系统、取像装置及电子装置
WO2019218613A1 (zh) 光学成像镜头
WO2022061676A1 (zh) 光学镜头、取像模组及电子装置

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: 19952099

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2019952099

Country of ref document: EP

Effective date: 20210714

NENP Non-entry into the national phase

Ref country code: DE