WO2022141514A1 - 光学系统、取像模组及电子设备 - Google Patents

光学系统、取像模组及电子设备 Download PDF

Info

Publication number
WO2022141514A1
WO2022141514A1 PCT/CN2020/142404 CN2020142404W WO2022141514A1 WO 2022141514 A1 WO2022141514 A1 WO 2022141514A1 CN 2020142404 W CN2020142404 W CN 2020142404W WO 2022141514 A1 WO2022141514 A1 WO 2022141514A1
Authority
WO
WIPO (PCT)
Prior art keywords
lens
optical system
object side
optical axis
refractive power
Prior art date
Application number
PCT/CN2020/142404
Other languages
English (en)
French (fr)
Inventor
谢晗
刘彬彬
李明
Original Assignee
欧菲光集团股份有限公司
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 欧菲光集团股份有限公司, 江西晶超光学有限公司 filed Critical 欧菲光集团股份有限公司
Priority to PCT/CN2020/142404 priority Critical patent/WO2022141514A1/zh
Publication of WO2022141514A1 publication Critical patent/WO2022141514A1/zh

Links

Images

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
    • 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

Definitions

  • the invention relates to the field of imaging, in particular to an optical system, an imaging module and an electronic device.
  • optical systems are more and more widely used in electronic devices such as smart phones, tablet computers, and wearable devices, so as to enable electronic devices to have shooting functions and enhance the diversified functions of electronic devices.
  • electronic devices such as smart phones, tablet computers, and wearable devices
  • the market has higher and higher requirements for camera functions.
  • Camera lenses with high pixels are becoming more and more popular, and the size of the photosensitive elements mounted is getting larger and larger.
  • the current common optical system usually improves the imaging resolution by increasing the number of lenses, which leads to an increase in the total length of the optical system, which restricts the reduction of the thickness of electronic devices and makes it difficult to meet the requirements of miniaturized design of electronic devices.
  • an optical system an imaging module, and an electronic device are provided.
  • An optical system comprising in order from the object side to the image side:
  • the object side of the first lens is concave at the near optical axis
  • the object side of the second lens is convex at the near optical axis
  • a third lens with refractive power the object side of the third lens is convex at the near-optical axis, and the image side is concave at the near-optical axis;
  • SAG1 is the sag at the maximum effective light aperture of the object side of the first lens, that is, the maximum effective light pass from the intersection of the object side of the first lens and the optical axis to the object side of the first lens
  • the aperture is the distance in the direction of the optical axis
  • f1 is the effective focal length of the first lens.
  • An imaging module includes a photosensitive element and the optical system according to any one of the above embodiments, wherein the photosensitive element is arranged on the image side of the optical system.
  • An electronic device includes a casing and the above-mentioned imaging module, wherein the imaging module is arranged on the casing.
  • FIG. 1 is a schematic diagram of an optical system in a first embodiment of the application
  • FIG. 2 is a spherical aberration diagram, an astigmatism diagram and a distortion diagram of the optical system in the first embodiment of the application;
  • FIG. 3 is a schematic diagram of an optical system in a second embodiment of the present application.
  • FIG. 4 is a spherical aberration diagram, an astigmatism diagram and a distortion diagram of the optical system in the second embodiment of the application;
  • FIG. 5 is a schematic diagram of an optical system in a third embodiment of the present application.
  • FIG. 6 is a spherical aberration diagram, an astigmatism diagram and a distortion diagram of the optical system in the third embodiment of the present application;
  • FIG. 7 is a schematic diagram of an optical system in a fourth embodiment of the present application.
  • FIG. 9 is a schematic diagram of an optical system in a fifth embodiment of the present application.
  • FIG. 10 is a spherical aberration diagram, an astigmatism diagram and a distortion diagram of the optical system in the fifth embodiment of the application;
  • FIG. 11 is a schematic diagram of an optical system in a sixth embodiment of the application.
  • FIG. 13 is a schematic diagram of an imaging module in an embodiment of the application.
  • FIG. 14 is a schematic diagram of an electronic device in an embodiment of the present application.
  • the optical system 100 includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, The sixth lens L6 and the seventh lens L7.
  • the first lens L1 includes an object side S1 and an image side S2
  • the second lens L2 includes an object side S3 and an image side S4
  • the third lens L3 includes an object side S5 and an image side S6
  • the fourth lens L4 includes an object side S7
  • the image side S8 the fifth lens L5 includes the object side S9 and the image side S10
  • the sixth lens L6 includes the object side S11 and the image side S12
  • the seventh lens L7 includes the object side S13 and the image side S14.
  • the first lens L1 has a negative refractive power
  • the object side surface S1 of the first lens L1 is concave at the near optical axis 110 .
  • the second lens L2 has a positive refractive power
  • the object side S3 of the second lens L2 is convex at the near optical axis 110 , which is beneficial to improve the ability of the second lens L2 to condense light, thereby shortening the overall system length of the optical system 100 .
  • the object side S5 of the third lens L3 is convex at the near optical axis 110
  • the image side S6 is concave at the near optical axis 110 .
  • the fourth lens L4 has a positive refractive power
  • the fifth lens L5 has a refractive power
  • the sixth lens L6 has a positive refractive power
  • the seventh lens L7 has a negative refractive power.
  • the optical system 100 is provided with a diaphragm (not shown in the figure), and the diaphragm can be disposed on the object side of the first lens L1, and further, the diaphragm can be disposed on the object side of the first lens L1 Before S1 or on the object side S1, or the diaphragm can be arranged on the image side of the seventh lens L7, further, the diaphragm can be arranged behind the image side S14 of the seventh lens L7 or on the image side S14, or the diaphragm can be arranged Between any two lenses of the first lens L1 to the seventh lens L7, specifically, in some embodiments, the diaphragm can be disposed between the second lens L2 and the third lens L3, for example, disposed in the second lens Image side of L2. It should be noted that the diaphragm is the aperture diaphragm of the optical system 100 .
  • the optical system 100 further includes an infrared filter L8 disposed on the image side of the seventh lens L7, and the infrared filter L8 includes an object side S15 and an image side S16.
  • the optical system 100 further includes an image plane S17 located on the image side of the seventh lens L7, the image plane S17 is the imaging plane of the optical system 100, and the incident light passes through the first lens L1, the second lens L2, the third lens L3, The fourth lens L4 , the fifth lens L5 , the sixth lens L6 and the seventh lens L7 can form an image on the image plane S17 after adjustment.
  • the infrared filter L8 may be an infrared cut filter, which is used to filter out interference light and prevent the interference light from reaching the image plane S17 of the optical system 100 to affect normal imaging.
  • the object side and the image side of each lens of the optical system 100 are aspherical.
  • the use of the aspherical structure can improve the flexibility of lens design, effectively correct the spherical aberration of the optical system 100, and improve the imaging quality.
  • the object side surface and the image side surface of each lens of the optical system 100 may also be spherical surfaces. It should be noted that the above embodiments are only examples of some embodiments of the present application. In some embodiments, the surfaces of the lenses in the optical system 100 may be aspherical or any combination of spherical surfaces.
  • the material of each lens in the optical system 100 may be glass or plastic.
  • a lens made of plastic material can reduce the weight of the optical system 100 and reduce the production cost, and in combination with the smaller size of the optical system, a light and miniaturized design of the optical system can be realized.
  • the lens made of glass enables the optical system 100 to have excellent optical performance and high temperature resistance.
  • the material of each lens in the optical system 100 can also be any combination of glass and plastic, and not necessarily all of glass or all of plastic.
  • the first lens L1 does not mean that there is only one lens.
  • the surface of the cemented lens closest to the object side can be regarded as the object side S1, and the surface closest to the image side can be regarded as the image side S2.
  • a cemented lens is not formed between the lenses in the first lens L1, but the distance between the lenses is relatively fixed.
  • the object side of the lens closest to the object side is the object side S1
  • the lens closest to the image side The image side is the image side S2.
  • the number of lenses in the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6 or the seventh lens L7 in some embodiments may also be greater than or equal to two, and any A cemented lens or a non-cemented lens may be formed between adjacent lenses.
  • the optical system 100 satisfies the conditional formula:
  • *100 may be: 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, 1.1 or 1.2.
  • the object side surface S1 of the first lens L1 tends to be flat, which is beneficial to shorten the size of the first lens L1 in the direction of the optical axis 110, thereby shortening the overall system length of the optical system 100, and realizing the miniaturization of the optical system 100. design.
  • the surface shape of the object side surface S1 of the first lens L1 is gentle and the curvature is small, which is favorable for the injection molding of the first lens L1.
  • the sag of the object side surface S1 of the first lens L1 is too large, and the surface shape is too curved, resulting in the size of the first lens L1 in the direction of the optical axis 110 being too large, and the first lens L1 occupies Excessive space hinders the reduction of the total length of the optical system 100 , which is not conducive to the miniaturized design of the optical system 100 .
  • the optical system 100 satisfies the conditional formula: TTL/ImgH ⁇ 1.7; wherein, TTL is the distance from the object side S1 of the first lens L1 to the imaging surface of the optical system 100 on the optical axis 110, and ImgH is the optical system Half of the image height corresponding to the maximum field of view of 100.
  • TTL/ImgH may be: 1.514, 1.532, 1.539, 1.554, 1.562, 1.593, 1.605, 1.633, 1.656 or 1.670.
  • the ratio of the total optical length and half image height of the optical system 100 can be properly configured, thereby effectively compressing the total system length of the optical system 100 , which is beneficial to the miniaturized design of the optical system 100 .
  • ImgH determines the imaging size of the optical system 100.
  • the system can be matched with a large-sized photosensitive element, thereby realizing a large image area and high-pixel imaging.
  • the upper limit of the above conditional expression is exceeded, the total system length of the optical system 100 is too long, which is not conducive to the miniaturized design of the optical system 100 , and makes it difficult for the optical system 100 to match ultra-thin electronic devices.
  • the optical system 100 satisfies the conditional formula: 1.7 ⁇ FNO/tan(HFOV) ⁇ 2.0; wherein, FNO is the aperture number of the optical system 100 , and HFOV is half of the maximum field angle of the optical system 100 .
  • FNO/tan(HFOV) may be: 1.797, 1.803, 1.825, 1.866, 1.876, 1.899, 1.925, 1.964, 1.977 or 1.987.
  • the aperture number and field angle of the optical system 100 can be reasonably configured so that the optical system 100 has a large aperture, which is beneficial to correct aberrations of the optical system 100 and improve the imaging quality of the optical system 100 .
  • the aperture number of the optical system 100 is too large, the amount of incoming light is reduced, and the imaging quality of the optical system 100 in a low-light environment is easily degraded.
  • the aperture number of the optical system 100 is too small, so that the effective aperture of the diaphragm is too large, and it is difficult to effectively adjust the edge light of the field of view, which is not conducive to correcting the image of the optical system 100. Difference.
  • the optical system 100 can be matched with a photosensitive element having a rectangular photosensitive surface, and the imaging surface of the optical system 100 is coincident with the photosensitive surface of the photosensitive element.
  • the effective pixel area on the imaging surface of the optical system 100 has a horizontal direction and a diagonal direction, then ImgH can be understood as half of the diagonal length of the effective pixel area on the imaging surface of the optical system 100, and HFOV can be understood as an optical system. 100 Half of the maximum field of view in the diagonal direction.
  • the optical system 100 satisfies the conditional formula: 90 ⁇ V3+V4+V5 ⁇ 110; wherein, V3 is the Abbe number of the third lens L3 under the d-line, and V4 is the fourth lens L4 under the d-line V5 is the Abbe number of the fifth lens L5 under the d line, that is, V3, V4, V5 are the third lens L3, the fourth lens L4 and the fifth lens L5 at the reference wavelength of 587.56nm. Abbe number. Specifically, V3+V4+V5 may be: 98.888, 99.125, 101.552, 102.376, 103.645, 105.285, 106.968, 107.332, 107.453 or 108.279.
  • the Abbe numbers of the third lens L3 , the fourth lens L4 and the fifth lens L5 can be properly configured, thereby effectively correcting the chromatic aberration of the optical system 100 and improving the imaging quality of the optical system 100 .
  • the Abbe numbers of the third lens L3, the fourth lens L4 and the fifth lens L5 are too small, and the correction of the chromatic aberration by the third lens L3, the fourth lens L4 and the fifth lens L5 is insufficient. , the image quality of the optical system 100 is easily degraded.
  • the upper limit of the above-mentioned conditional expression is exceeded, the Abbe numbers of the third lens L3 , the fourth lens L4 , and the fifth lens L5 are too large, resulting in an increase in the cost of the optical system 100 .
  • the optical system 100 satisfies the conditional formula: 1.8 ⁇ f2/R3 ⁇ 2.0; wherein, f2 is the effective focal length of the second lens L2, and R3 is the curvature of the object side surface S3 of the second lens L2 at the optical axis 110 radius.
  • f2/R3 may be: 1.836, 1.852, 1.864, 1.882, 1.893, 1.905, 1.965, 1.973, 1.979 or 1.987.
  • the second lens L2 provides sufficient positive refractive power for the optical system 100, which is conducive to shortening the total system length of the optical system 100, and at the same time, the refractive power of the second lens L2 is not too strong, which is conducive to correcting the optical system 100 ball difference.
  • the effective focal length of the second lens L2 is too long, and the positive refractive power is too weak, which is unfavorable for shortening the overall system length of the optical system 100.
  • the positive refractive power of the second lens L2 is too strong, which makes it difficult to correct spherical aberration of the optical system 100 , which is not conducive to improving the imaging quality of the optical system 100 .
  • the optical system 100 satisfies the conditional formula: 2.5 ⁇ CT2/CT1 ⁇ 3.5; wherein, CT2 is the thickness of the second lens L2 on the optical axis 110, that is, the central thickness of the second lens L2, and CT1 is the first The thickness of the lens L1 on the optical axis 110 is the central thickness of the first lens L1.
  • CT2/CT1 may be: 2.529, 2.616, 2.751, 2.863, 2.964, 3.021, 3.112, 3.220, 3.365, or 3.486.
  • the thickness of the first lens L1 on the optical axis 110 is small and the surface shape is flat, which is beneficial to reduce the space ratio of the first lens L1 in the optical system 100 , and is further beneficial to the miniaturization of the optical system 100 design.
  • the size of the second lens L2 on the optical axis 110 is too large, which is not conducive to the miniaturized design of the optical system 100 .
  • the size of the first lens L1 on the optical axis 110 is too large, which leads to an increase in the total system length of the optical system 100 , which is not conducive to the miniaturized design of the optical system 100 .
  • the optical system 100 satisfies the conditional formula: -10 ⁇ (R7+R8)/(R7-R8) ⁇ 1.5; wherein, R7 is the radius of curvature of the object side surface S7 of the fourth lens L4 at the optical axis 110 , R8 is the radius of curvature of the image side surface S8 of the fourth lens L4 at the optical axis 110 .
  • R7+R8)/(R7-R8) may be: -9.820, -8.324, -7.635, -6.558, -5.374, -4.615, -3.669, -2.112, -1.036 or 1.339.
  • the fourth lens L4 is located in the middle position of the optical system 100.
  • the degree of surface curvature of the object side S7 and the image side S8 of the fourth lens L4 can be reasonably increased, which is beneficial for the fourth lens L4 to cooperate with the optical system 100.
  • the rest of the lenses are used for imaging, which is beneficial to correct the aberration of the optical system 100 and improve the imaging quality of the optical system 100 .
  • the optical system 100 satisfies the conditional formula: Y1/Y2 ⁇ 1.5; wherein, Y1 is half of the maximum effective clear aperture of the object side S1 of the first lens L1, and Y2 is the object side S3 of the second lens L2 half of the maximum effective clear aperture.
  • Y1/Y2 may be: 1.373, 1.376, 1.380, 1.388, 1.392, 1.395, 1.401, 1.405, 1.411 or 1.425.
  • the difference between the maximum effective light apertures of the object side S1 of the first lens L1 and the object side S3 of the second lens L2 can be reduced, so that the deflection angle of the light entering the optical system 100 will not be too large, Helps to reduce the generation of aberrations.
  • Exceeding the upper limit of the above conditional expression the difference between the maximum effective light apertures of the object side S1 of the first lens L1 and the object side S3 of the second lens L2 is too large, which will easily lead to an increase in the tolerance sensitivity of the first lens L1 and the second lens L2. Further, the molding yield of the first lens L1 and the second lens L2 is reduced.
  • the optical system 100 satisfies the conditional formula: -0.65 ⁇ R12/f6 ⁇ -0.45; wherein, R12 is the radius of curvature of the image side surface S12 of the sixth lens L6 at the optical axis 110, and f6 is the sixth lens L6 effective focal length.
  • R12/f6 may be: -0.608, -0.595, -0.564, -5.551, -0.531, -0.523, -0.502, -4.998, -4.925, or -0.487.
  • the sixth lens L6 provides a positive refractive power for the optical system 100.
  • the image side S12 of the sixth lens L6 is convex at the near optical axis 110, which is beneficial to the coordination of the sixth lens L6 and the seventh lens L7.
  • the distortion of the optical system 100 can be effectively corrected at the same time.
  • FIG. 1 is a schematic diagram of the optical system 100 in the first embodiment.
  • the optical system 100 sequentially includes a first lens L1 with negative refractive power, a first lens L1 with positive refractive power from the object side to the image side Two lenses L2, a third lens L3 with negative refractive power, a fourth lens L4 with positive refractive power, a fifth lens L5 with negative refractive power, a sixth lens L6 with positive refractive power, and a fourth lens with negative refractive power Seven lens L7.
  • FIG. 2 is a graph of spherical aberration, astigmatism and distortion of the optical system 100 in the first embodiment from left to right, wherein the reference wavelength of the astigmatism graph and the distortion graph is 587.56 nm (line d), and other embodiments are the same .
  • the object side surface S1 of the first lens L1 is a concave surface near the optical axis 110, and a convex surface near the circumference;
  • the image side surface S2 of the first lens L1 is concave at the near optical axis 110, and is concave at the near circumference;
  • the object side surface S3 of the second lens L2 is a convex surface near the optical axis 110, and is a convex surface near the circumference;
  • the image side surface S4 of the second lens L2 is a convex surface at the near optical axis 110, and is a concave surface near the circumference;
  • the object side surface S5 of the third lens L3 is a convex surface near the optical axis 110, and is a convex surface near the circumference;
  • the image side surface S6 of the third lens L3 is concave at the near optical axis 110, and is concave at the near circumference;
  • the object side surface S7 of the fourth lens L4 is a concave surface near the optical axis 110, and is a concave surface near the circumference;
  • the image side surface S8 of the fourth lens L4 is a convex surface near the optical axis 110, and is a convex surface near the circumference;
  • the object side surface S9 of the fifth lens L5 is concave at the near optical axis 110, and is concave at the near circumference;
  • the image side surface S10 of the fifth lens L5 is a convex surface near the optical axis 110, and is a convex surface near the circumference;
  • the object side surface S11 of the sixth lens L6 is a concave surface near the optical axis 110, and a convex surface near the circumference;
  • the image side surface S12 of the sixth lens L6 is a convex surface at the near optical axis 110, and is a concave surface near the circumference;
  • the object side surface S13 of the seventh lens L7 is a convex surface near the optical axis 110, and a concave surface near the circumference;
  • the image side surface S14 of the seventh lens L7 is a concave surface near the optical axis 110 and a convex surface near the circumference.
  • the object and image sides of the first lens L1 , the second lens L2 , the third lens L3 , the fourth lens L4 , the fifth lens L5 , the sixth lens L6 and the seventh lens L7 are aspherical surfaces.
  • the shape of the surface from the center (the intersection of the surface and the optical axis 110) to the edge direction can be purely convex; Or transition from a convex shape to a concave shape in the central area, and then to a convex shape near the maximum effective radius.
  • This is only an example for illustrating the relationship between the optical axis 110 and the circumference.
  • Various shapes and structures of the surface (concave-convex relationship) are not fully reflected, but other situations can be derived from the above examples.
  • the materials of the first lens L1 , the second lens L2 , the third lens L3 , the fourth lens L4 , the fifth lens L5 , the sixth lens L6 and the seventh lens L7 are all plastics.
  • the optical system 100 satisfies the conditional formula:
  • *100 0.8; wherein, SAG1 is the sag at the maximum effective aperture of the object side S1 of the first lens L1, and f1 is the effective aperture of the first lens L1 focal length.
  • SAG1 is the sag at the maximum effective aperture of the object side S1 of the first lens L1
  • f1 is the effective aperture of the first lens L1 focal length.
  • the object side surface S1 of the first lens L1 tends to be flat, which is beneficial to shorten the size of the first lens L1 in the direction of the optical axis 110, thereby shortening the overall system length of the optical system 100, and realizing the miniaturization of the optical system 100. design.
  • the surface shape of the object side surface S1 of the first lens L1 is gentle and the curvature is small, which is favorable for the injection molding of the first lens L1.
  • TTL is the distance from the object side S1 of the first lens L1 to the imaging surface of the optical system 100 on the optical axis 110
  • ImgH is the maximum angle of view of the optical system 100
  • the corresponding image is half the height.
  • the ratio of the total optical length and half image height of the optical system 100 can be properly configured, thereby effectively compressing the total system length of the optical system 100 , which is beneficial to the miniaturized design of the optical system 100 .
  • ImgH determines the imaging size of the optical system 100.
  • the system can be matched with a large-sized photosensitive element, thereby realizing a large image area and high-pixel imaging.
  • FNO is the aperture number of the optical system 100
  • HFOV is half of the maximum field angle of the optical system 100 .
  • the aperture number and field angle of the optical system 100 can be reasonably configured so that the optical system 100 has a large aperture, which is beneficial to correct aberrations of the optical system 100 and improve the imaging quality of the optical system 100 .
  • the aperture number of the optical system 100 will not be too large, so as to ensure that the optical system 100 has a sufficient amount of incoming light, thereby improving the imaging quality of the optical system 100 in a weak light environment.
  • V3 is the Abbe number of the third lens L3 under the d line
  • V4 is the Abbe number of the fourth lens L4 under the d line
  • V5 is the first The Abbe number of the five-lens L5 at the d-line.
  • the Abbe numbers of the third lens L3 , the fourth lens L4 and the fifth lens L5 can be properly configured, thereby effectively correcting the chromatic aberration of the optical system 100 and improving the imaging quality of the optical system 100 .
  • the Abbe numbers of the third lens L3 , the fourth lens L4 and the fifth lens L5 will not be too large, which is beneficial to
  • the second lens L2 provides sufficient positive refractive power for the optical system 100, which is conducive to shortening the total system length of the optical system 100, and at the same time, the refractive power of the second lens L2 is not too strong, which is conducive to correcting the optical system 100 ball difference.
  • CT1 is the thickness of the first lens L1 on the optical axis 110
  • the thickness is the central thickness of the first lens L1.
  • the thickness of the first lens L1 on the optical axis 110 is small and the surface shape is flat, which is beneficial to reduce the space ratio of the first lens L1 in the optical system 100 , and is further beneficial to the miniaturization of the optical system 100 design.
  • the fourth lens L4 is located in the middle position of the optical system 100.
  • the degree of surface curvature of the object side S7 and the image side S8 of the fourth lens L4 can be reasonably increased, which is beneficial for the fourth lens L4 to cooperate with the optical system 100.
  • the rest of the lenses are used for imaging, which is beneficial to correct the aberration of the optical system 100 and improve the imaging quality of the optical system 100 .
  • Y1 is half of the maximum effective light aperture of the object side S1 of the first lens L1
  • Y2 is the maximum effective light aperture of the object side S3 of the second lens L2 half of .
  • the sixth lens L6 provides a positive refractive power for the optical system 100.
  • the image side S12 of the sixth lens L6 is convex at the near optical axis 110, which is beneficial to the coordination of the sixth lens L6 and the seventh lens L7. In order to shorten the back focal length of the optical system 100 and effectively correct the distortion of the optical system 100 .
  • the image plane S17 in Table 1 can be understood as the imaging plane of the optical system 100 .
  • the elements from the object plane (not shown) to the image plane S17 are sequentially arranged in the order of the elements in Table 1 from top to bottom.
  • the Y radius in Table 1 is the curvature radius of the object side surface or the image side surface of the corresponding surface number at the optical axis 110 .
  • Surface number 1 and surface number 2 are the object side S1 and the image side S2 of the first lens L1 respectively, that is, in the same lens, the surface with the smaller surface number is the object side, and the surface with the larger surface number is the image side.
  • the first value in the "thickness" parameter column of the first lens L1 is the thickness of the lens on the optical axis 110, and the second value is the rear surface of the lens in the direction from the image side to the image side on the optical axis 110 the distance.
  • the optical system 100 may not be provided with the infrared filter L8, but at this time, the distance from the image surface S14 to the image surface S17 of the seventh lens L7 remains unchanged.
  • the reference wavelengths of the focal length, refractive index and Abbe number of each lens are all 587.56 nm (d-line), and other embodiments are also the same.
  • the aspheric coefficients of the image side or object side of each lens of the optical system 100 are given in Table 2.
  • the surface numbers from 1-14 represent the image side or the object side S1-S14 respectively.
  • K-A20 represent the types of aspheric coefficients, where K represents the conic coefficient, A4 represents the fourth-order aspheric coefficient, A6 represents the sixth-order aspheric coefficient, and A8 represents the eight-order aspheric coefficient. analogy.
  • the aspheric coefficient can be used but not limited to the following formula:
  • Z is the distance from the corresponding point on the aspheric surface to the plane tangent to the surface vertex in the direction of the optical axis 110
  • r is the vertical distance from the corresponding point on the aspheric surface to the optical axis 110
  • c is the curvature of the aspheric surface vertex
  • k is the conic coefficient
  • Ai is the coefficient corresponding to the i-th high-order term in the aspheric surface formula.
  • FIG. 2 includes a longitudinal spherical aberration diagram (Longitudinal Spherical Aberration) of the optical system 100 , which represents the deviation of the converging focus of light of different wavelengths after passing through the lens.
  • the ordinate of the longitudinal spherical aberration map represents the normalized pupil coordinate (Normalized Pupil Coordinator) from the pupil center to the pupil edge, and the abscissa represents the distance from the imaging plane to the intersection of the light ray and the optical axis 110 (unit is mm) .
  • FIG. 2 also includes a field curvature diagram (ASTIGMATIC FIELD CURVES) of the optical system 100, wherein the S curve represents the sagittal field curvature at 587.56 nm, and the T curve represents the meridional field curvature at 587.56 nm.
  • ASIGMATIC FIELD CURVES field curvature diagram
  • FIG. 2 also includes a distortion diagram (DISTORTION) of the optical system 100. It can be seen from the diagram that the image distortion caused by the main beam is small, and the imaging quality of the system is excellent.
  • DISTORTION distortion diagram
  • FIG. 3 is a schematic diagram of the optical system 100 in the second embodiment.
  • the optical system 100 sequentially includes a first lens L1 with negative refractive power, a first lens L1 with positive refractive power from the object side to the image side Two lenses L2, a third lens L3 with negative refractive power, a fourth lens L4 with positive refractive power, a fifth lens L5 with negative refractive power, a sixth lens L6 with positive refractive power, and a fourth lens with negative refractive power Seven lens L7.
  • FIG. 4 is a graph of spherical aberration, astigmatism and distortion of the optical system 100 in the second embodiment from left to right.
  • the object side surface S1 of the first lens L1 is a concave surface near the optical axis 110, and a convex surface near the circumference;
  • the image side surface S2 of the first lens L1 is concave at the near optical axis 110, and is concave at the near circumference;
  • the object side surface S3 of the second lens L2 is a convex surface near the optical axis 110, and is a convex surface near the circumference;
  • the image side surface S4 of the second lens L2 is concave at the near optical axis 110, and is concave at the near circumference;
  • the object side surface S5 of the third lens L3 is a convex surface near the optical axis 110, and is a convex surface near the circumference;
  • the image side surface S6 of the third lens L3 is concave at the near optical axis 110, and is concave at the near circumference;
  • the object side surface S7 of the fourth lens L4 is a convex surface near the optical axis 110, and is a convex surface near the circumference;
  • the image side surface S8 of the fourth lens L4 is a convex surface near the optical axis 110, and is a convex surface near the circumference;
  • the object side surface S9 of the fifth lens L5 is concave at the near optical axis 110, and is concave at the near circumference;
  • the image side surface S10 of the fifth lens L5 is a concave surface at the near optical axis 110, and a convex surface near the circumference;
  • the object side surface S11 of the sixth lens L6 is concave at the near optical axis 110, and is concave at the near circumference;
  • the image side surface S12 of the sixth lens L6 is a convex surface at the near optical axis 110, and is a convex surface near the circumference;
  • the object side surface S13 of the seventh lens L7 is a convex surface at the near optical axis 110, and is a concave surface near the circumference;
  • the image side surface S14 of the seventh lens L7 is a concave surface near the optical axis 110 and a convex surface near the circumference.
  • the object and image sides of the first lens L1 , the second lens L2 , the third lens L3 , the fourth lens L4 , the fifth lens L5 , the sixth lens L6 and the seventh lens L7 are aspherical surfaces.
  • the materials of the first lens L1 , the second lens L2 , the third lens L3 , the fourth lens L4 , the fifth lens L5 , the sixth lens L6 and the seventh lens L7 are all plastics.
  • the parameters of the optical system 100 are given in Table 3, and the definitions of the parameters can be obtained from the first embodiment, which will not be repeated here.
  • the aspheric coefficients of the image side or object side of each lens of the optical system 100 are given in Table 4, and the definitions of the parameters can be obtained from the first embodiment, which will not be repeated here.
  • FIG. 5 is a schematic diagram of the optical system 100 in the third embodiment.
  • the optical system 100 sequentially includes a first lens L1 with negative refractive power, a first lens L1 with positive refractive power from the object side to the image side Two lenses L2, a third lens L3 with positive refractive power, a fourth lens L4 with positive refractive power, a fifth lens L5 with negative refractive power, a sixth lens L6 with positive refractive power, and a fourth lens with negative refractive power Seven lens L7.
  • FIG. 6 is a graph of spherical aberration, astigmatism and distortion of the optical system 100 in the third embodiment from left to right.
  • the object side surface S1 of the first lens L1 is a concave surface near the optical axis 110, and a convex surface near the circumference;
  • the image side surface S2 of the first lens L1 is concave at the near optical axis 110, and is concave at the near circumference;
  • the object side surface S3 of the second lens L2 is a convex surface near the optical axis 110, and is a convex surface near the circumference;
  • the image side surface S4 of the second lens L2 is concave at the near optical axis 110, and is concave at the near circumference;
  • the object side surface S5 of the third lens L3 is a convex surface near the optical axis 110, and is a convex surface near the circumference;
  • the image side surface S6 of the third lens L3 is concave at the near optical axis 110, and is concave at the near circumference;
  • the object side surface S7 of the fourth lens L4 is a concave surface near the optical axis 110, and is a concave surface near the circumference;
  • the image side surface S8 of the fourth lens L4 is a convex surface near the optical axis 110, and is a convex surface near the circumference;
  • the object side surface S9 of the fifth lens L5 is concave at the near optical axis 110, and is concave at the near circumference;
  • the image side surface S10 of the fifth lens L5 is a convex surface near the optical axis 110, and is a convex surface near the circumference;
  • the object side surface S11 of the sixth lens L6 is a concave surface near the optical axis 110, and a convex surface near the circumference;
  • the image side surface S12 of the sixth lens L6 is a convex surface at the near optical axis 110, and is a convex surface near the circumference;
  • the object side surface S13 of the seventh lens L7 is a convex surface near the optical axis 110, and a concave surface near the circumference;
  • the image side surface S14 of the seventh lens L7 is a concave surface near the optical axis 110 and a convex surface near the circumference.
  • the object and image sides of the first lens L1 , the second lens L2 , the third lens L3 , the fourth lens L4 , the fifth lens L5 , the sixth lens L6 and the seventh lens L7 are aspherical surfaces.
  • the materials of the first lens L1 , the second lens L2 , the third lens L3 , the fourth lens L4 , the fifth lens L5 , the sixth lens L6 and the seventh lens L7 are all plastics.
  • the parameters of the optical system 100 are given in Table 5, and the definitions of the parameters can be obtained from the first embodiment, which will not be repeated here.
  • the aspheric coefficients of the image side or object side of each lens of the optical system 100 are given in Table 6, and the definitions of the parameters can be obtained from the first embodiment, which will not be repeated here.
  • FIG. 7 is a schematic diagram of the optical system 100 in the fourth embodiment.
  • the optical system 100 sequentially includes a first lens L1 with negative refractive power, a first lens L1 with positive refractive power from the object side to the image side Two lenses L2, a third lens L3 with negative refractive power, a fourth lens L4 with positive refractive power, a fifth lens L5 with negative refractive power, a sixth lens L6 with positive refractive power, and a fourth lens with negative refractive power Seven lens L7.
  • FIG. 8 is a graph of spherical aberration, astigmatism and distortion of the optical system 100 in the fourth embodiment from left to right.
  • the object side surface S1 of the first lens L1 is a concave surface near the optical axis 110, and a convex surface near the circumference;
  • the image side surface S2 of the first lens L1 is concave at the near optical axis 110, and is concave at the near circumference;
  • the object side surface S3 of the second lens L2 is a convex surface near the optical axis 110, and is a convex surface near the circumference;
  • the image side surface S4 of the second lens L2 is concave at the near optical axis 110, and is concave at the near circumference;
  • the object side surface S5 of the third lens L3 is a convex surface near the optical axis 110, and is a convex surface near the circumference;
  • the image side surface S6 of the third lens L3 is concave at the near optical axis 110, and is concave at the near circumference;
  • the object side surface S7 of the fourth lens L4 is a convex surface near the optical axis 110, and is a concave surface near the circumference;
  • the image side surface S8 of the fourth lens L4 is a convex surface near the optical axis 110, and is a convex surface near the circumference;
  • the object side surface S9 of the fifth lens L5 is concave at the near optical axis 110, and is concave at the near circumference;
  • the image side surface S10 of the fifth lens L5 is a concave surface at the near optical axis 110, and a convex surface near the circumference;
  • the object side surface S11 of the sixth lens L6 is a convex surface near the optical axis 110, and a concave surface near the circumference;
  • the image side surface S12 of the sixth lens L6 is a convex surface at the near optical axis 110, and is a concave surface near the circumference;
  • the object side surface S13 of the seventh lens L7 is concave at the near optical axis 110, and is concave at the near circumference;
  • the image side surface S14 of the seventh lens L7 is a concave surface near the optical axis 110 and a convex surface near the circumference.
  • the object and image sides of the first lens L1 , the second lens L2 , the third lens L3 , the fourth lens L4 , the fifth lens L5 , the sixth lens L6 and the seventh lens L7 are aspherical surfaces.
  • the materials of the first lens L1 , the second lens L2 , the third lens L3 , the fourth lens L4 , the fifth lens L5 , the sixth lens L6 and the seventh lens L7 are all plastics.
  • the parameters of the optical system 100 are given in Table 7, and the definitions of the parameters can be obtained from the first embodiment, which will not be repeated here.
  • the aspheric coefficients of the image side or object side of each lens of the optical system 100 are given in Table 8, and the definitions of the parameters can be obtained from the first embodiment, which will not be repeated here.
  • FIG. 9 is a schematic diagram of the optical system 100 in the fifth embodiment.
  • the optical system 100 includes a first lens L1 with negative refractive power and a first lens L1 with positive refractive power in sequence from the object side to the image side.
  • FIG. 10 is a graph of spherical aberration, astigmatism and distortion of the optical system 100 in the fifth embodiment from left to right.
  • the object side surface S1 of the first lens L1 is a concave surface near the optical axis 110, and a convex surface near the circumference;
  • the image side surface S2 of the first lens L1 is concave at the near optical axis 110, and is concave at the near circumference;
  • the object side surface S3 of the second lens L2 is a convex surface near the optical axis 110, and is a convex surface near the circumference;
  • the image side surface S4 of the second lens L2 is a concave surface at the near optical axis 110, and a convex surface near the circumference;
  • the object side surface S5 of the third lens L3 is a convex surface near the optical axis 110, and is a convex surface near the circumference;
  • the image side surface S6 of the third lens L3 is concave at the near optical axis 110, and is concave at the near circumference;
  • the object side surface S7 of the fourth lens L4 is a convex surface near the optical axis 110, and is a convex surface near the circumference;
  • the image side surface S8 of the fourth lens L4 is a concave surface at the near optical axis 110, and a convex surface near the circumference;
  • the object side surface S9 of the fifth lens L5 is a convex surface near the optical axis 110, and is a concave surface near the circumference;
  • the image side surface S10 of the fifth lens L5 is a concave surface at the near optical axis 110, and a convex surface near the circumference;
  • the object side surface S11 of the sixth lens L6 is a convex surface near the optical axis 110, and a concave surface near the circumference;
  • the image side surface S12 of the sixth lens L6 is a convex surface at the near optical axis 110, and is a convex surface near the circumference;
  • the object side surface S13 of the seventh lens L7 is concave at the near optical axis 110, and is concave at the near circumference;
  • the image side surface S14 of the seventh lens L7 is a concave surface near the optical axis 110 and a convex surface near the circumference.
  • the object and image sides of the first lens L1 , the second lens L2 , the third lens L3 , the fourth lens L4 , the fifth lens L5 , the sixth lens L6 and the seventh lens L7 are aspherical surfaces.
  • the materials of the first lens L1 , the second lens L2 , the third lens L3 , the fourth lens L4 , the fifth lens L5 , the sixth lens L6 and the seventh lens L7 are all plastics.
  • the parameters of the optical system 100 are given in Table 9, and the definitions of the parameters can be obtained from the first embodiment, which will not be repeated here.
  • the aspheric coefficients of the image side or object side of each lens of the optical system 100 are given in Table 10, and the definitions of the parameters can be obtained from the first embodiment, which will not be repeated here.
  • FIG. 11 is a schematic diagram of the optical system 100 in the sixth embodiment.
  • the optical system 100 sequentially includes a first lens L1 with negative refractive power, a first lens L1 with positive refractive power from the object side to the image side Two lenses L2, a third lens L3 with negative refractive power, a fourth lens L4 with positive refractive power, a fifth lens L5 with positive refractive power, a sixth lens L6 with positive refractive power, and a fourth lens with negative refractive power Seven lens L7.
  • FIG. 12 is a graph of spherical aberration, astigmatism and distortion of the optical system 100 in the sixth embodiment from left to right.
  • the object side surface S1 of the first lens L1 is a concave surface near the optical axis 110, and a convex surface near the circumference;
  • the image side surface S2 of the first lens L1 is concave at the near optical axis 110, and is concave at the near circumference;
  • the object side surface S3 of the second lens L2 is a convex surface near the optical axis 110, and is a convex surface near the circumference;
  • the image side surface S4 of the second lens L2 is concave at the near optical axis 110, and is concave at the near circumference;
  • the object side surface S5 of the third lens L3 is a convex surface near the optical axis 110, and is a convex surface near the circumference;
  • the image side surface S6 of the third lens L3 is concave at the near optical axis 110, and is concave at the near circumference;
  • the object side surface S7 of the fourth lens L4 is a convex surface near the optical axis 110, and is a convex surface near the circumference;
  • the image side surface S8 of the fourth lens L4 is concave at the near optical axis 110, and is concave at the near circumference;
  • the object side surface S9 of the fifth lens L5 is a convex surface near the optical axis 110, and is a concave surface near the circumference;
  • the image side surface S10 of the fifth lens L5 is a concave surface at the near optical axis 110, and a convex surface near the circumference;
  • the object side surface S11 of the sixth lens L6 is a convex surface near the optical axis 110, and is a convex surface near the circumference;
  • the image side surface S12 of the sixth lens L6 is a convex surface at the near optical axis 110, and is a convex surface near the circumference;
  • the object side surface S13 of the seventh lens L7 is concave at the near optical axis 110, and is concave at the near circumference;
  • the image side surface S14 of the seventh lens L7 is a concave surface near the optical axis 110 and a convex surface near the circumference.
  • the object and image sides of the first lens L1 , the second lens L2 , the third lens L3 , the fourth lens L4 , the fifth lens L5 , the sixth lens L6 and the seventh lens L7 are aspherical surfaces.
  • the materials of the first lens L1 , the second lens L2 , the third lens L3 , the fourth lens L4 , the fifth lens L5 , the sixth lens L6 and the seventh lens L7 are all plastics.
  • the parameters of the optical system 100 are given in Table 11, and the definitions of the parameters can be obtained from the first embodiment, which will not be repeated here.
  • the aspheric coefficients of the image side or object side of each lens of the optical system 100 are given in Table 12, and the definitions of the parameters can be obtained from the first embodiment, which will not be repeated here.
  • the optical system 100 can be assembled with the photosensitive element 210 to form the imaging module 200 .
  • the photosensitive surface of the photosensitive element 210 can be regarded as the image surface S17 of the optical system 100 .
  • the imaging module 200 may also be provided with an infrared filter L8, and the infrared filter L8 is disposed between the image side S14 and the image surface S17 of the seventh lens L7.
  • the photosensitive element 210 may be a Charge Coupled Device (CCD) or a Complementary Metal-Oxide Semiconductor (Complementary Metal-Oxide Semiconductor Sensor, CMOS Sensor).
  • CCD Charge Coupled Device
  • CMOS Sensor Complementary Metal-Oxide Semiconductor Sensor
  • the imaging module 200 can be applied to an electronic device 300 , the electronic device includes a casing 310 , and the imaging module 200 is disposed in the casing 310 .
  • the electronic device 300 may be, but is not limited to, a mobile phone, a video phone, a smart phone, an electronic book reader, a vehicle-mounted camera device such as a driving recorder, or a wearable device such as a smart watch.
  • the housing 310 may be a middle frame of the electronic device 300 .
  • Using the imaging module 200 in the electronic device 300 is beneficial to the miniaturized design of the electronic device 300 .
  • first and second are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature delimited with “first”, “second” may expressly or implicitly include at least one of that feature.
  • plurality means at least two, such as two, three, etc., unless otherwise expressly and specifically defined.
  • a first feature "on” or “under” a second feature may be in direct contact between the first and second features, or the first and second features indirectly through an intermediary touch.
  • the first feature being “above”, “over” and “above” the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is level higher than the second feature.
  • the first feature being “below”, “below” and “below” the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)

Abstract

一种光学系统(100)，由物侧至像侧依次包括：具有负屈折力的第一透镜(L1)，物侧面(S1)于近光轴(110)处为凹面；具有正屈折力的第二透镜(L2)，物侧面(S3)于近光轴(110)处为凸面；具有屈折力的第三透镜(L3)，物侧面(S5)于近光轴(110)处为凸面，像侧面(L6)于近光轴(110)处为凹面；具有正屈折力的第四透镜(L4)；具有屈折力的第五透镜(L5)；具有正屈折力的第六透镜(L6)；具有负屈折力的第七透镜(L7)；光学系统(100)满足以下条件式：|SAG1/f1|*100≤2；其中，SAG1为第一透镜(L1)的物侧面(S1)的矢高，f1为第一透镜(L1)的有效焦距。

Description

光学系统、取像模组及电子设备 技术领域
本发明涉及摄像领域，特别是涉及一种光学系统、取像模组及电子设备。
背景技术
随着摄像领域的迅速发展，光学系统越来越广泛运用于智能手机、平板电脑、可穿戴设备等电子设备中，以使电子设备具备拍摄功能，提升电子设备的多样化功能。同时，随着电子设备的迅速发展，市场对摄像功能的要求也越来越高，具有高像素的摄像镜头逐渐流行，搭载的感光元件尺寸越来越大。然而，目前常见的光学系统通常通过增加透镜的数量来提高成像分辨率，导致光学系统的总长增大，制约了电子设备厚度的缩小，难以满足电子设备小型化设计的要求。
发明内容
根据本申请的各种实施例，提供一种光学系统、取像模组及电子设备。
一种光学系统，由物侧至像侧依次包括：
具有负屈折力的第一透镜，所述第一透镜的物侧面于近光轴处为凹面；
具有正屈折力的第二透镜，所述第二透镜的物侧面于近光轴处为凸面；
具有屈折力的第三透镜，所述第三透镜的物侧面于近光轴处为凸面，像侧面于近光轴处为凹面；
具有正屈折力的第四透镜；
具有屈折力的第五透镜；
具有正屈折力的第六透镜；
具有负屈折力的第七透镜；
且所述光学系统满足以下条件式：
|SAG1/f1|*100≤2；
其中，SAG1为所述第一透镜的物侧面的最大有效通光口径处的矢高，即所述第一透镜的物侧面与光轴的交点至所述第一透镜的物侧面的最大有效通光口径处于光轴方向上的距离，f1为所述第一透镜的有效焦距。
一种取像模组，包括感光元件以及上述任一实施例所述的光学系统，所述感光元件设置于所述光学系统的像侧。
一种电子设备，包括壳体以及上述的取像模组，所述取像模组设置于所述壳体。
本发明的一个或多个实施例的细节在下面的附图和描述中提出。本发明的其它特征、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和/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、目前描述的实施例和/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为本申请第一实施例中的光学系统的示意图；
图2为本申请第一实施例中的光学系统的球差图、像散图及畸变图；
图3为本申请第二实施例中的光学系统的示意图；
图4为本申请第二实施例中的光学系统的球差图、像散图及畸变图；
图5为本申请第三实施例中的光学系统的示意图；
图6为本申请第三实施例中的光学系统的球差图、像散图及畸变图；
图7为本申请第四实施例中的光学系统的示意图；
图8为本申请第四实施例中的光学系统的球差图、像散图及畸变图；
图9为本申请第五实施例中的光学系统的示意图；
图10为本申请第五实施例中的光学系统的球差图、像散图及畸变图；
图11为本申请第六实施例中的光学系统的示意图；
图12为本申请第六实施例中的光学系统的球差图、像散图及畸变图；
图13为本申请一实施例中的取像模组的示意图；
图14为本申请一实施例中的电子设备的示意图。
具体实施方式
为了便于理解本发明，下面将参照相关附图对本发明进行更全面的描述。附图中给出了本发明的较佳实施方式。但是，本发明可以以许多不同的形式来实现，并不限于本文所描述的实施方式。相反地，提供这些实施方式的目的是使对本发明的公开内容理解的更加透彻全面。
需要说明的是，当元件被称为“固定于”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“内”、“外”、“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。
请参见图1，在本申请的一些实施例中，光学系统100由物侧到像侧依次包括第一透镜L1、第二透镜L2、第三透镜L3、第四透镜L4、第五透镜L5、第六透镜L6以及第七透镜L7。具体地，第一透镜L1包括物侧面S1及像侧面S2，第二透镜L2包括物侧面S3及像侧面S4，第三透镜L3包括物侧面S5及像侧面S6，第四透镜L4包括物侧面S7及像侧面S8，第五透镜L5包括物侧面S9及像侧面S10，第六透镜L6包括物侧面S11及像侧面S12，第七透镜L7包括物侧面S13及像侧面S14。
其中，第一透镜L1具有负屈折力，第一透镜L1的物侧面S1于近光轴110处为凹面。第二透镜L2具有正屈折力，第二透镜L2的物侧面S3于近光轴110处为凸面，有利于提升第二透镜L2会聚光线的能力，进而有利于缩短光学系统100的系统总长。第三透镜L3的物侧面S5于近光轴110处为凸面，像侧面S6于近光轴110处为凹面。第四透镜L4具有正屈折力，第五透镜L5具有屈折力，第六透镜L6具有正屈折力，第七透镜L7具有负屈折力。
另外，在一些实施例中，光学系统100设置有光阑(图未示出)，光阑可设置于第一透镜L1的物方，进一步的，光阑可设置于第一透镜L1的物侧面S1之前或物侧面S1上，或光阑可设置于第七透镜L7的像方，进一步的，光阑可设置于第七透镜L7的像侧面S14之后或像侧面S14上，或者光阑可设置于第一透镜L1至第七透镜L7的任意两个透镜之间，具体地，在一些实施例中，光阑可设置于第二透镜L2和第三透镜L3之间，例如设置于第二透镜L2的像侧面。需要说明的是，光阑即为光学系统100的孔径光阑。
在一些实施例中，光学系统100还包括设置于第七透镜L7像方的红外滤光片L8，红外滤光片L8包括物侧面S15及像侧面S16。进一步地，光学系统100还包括位于第七透镜L7像方的像面S17，像面S17即为光学系统100的成像面，入射光经第一透镜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以及第七透镜L7调节后能够成像于像面S17。值得注意的是，红外滤光片L8可为红外截止滤光片，用于滤除干扰光，防止干扰光到达光学系统100的像面S17而影响正常成像。
在一些实施例中，光学系统100的各透镜的物侧面和像侧面均为非球面。非球面结构的采用能够提高透镜设计的灵活性，并有效地校正光学系统100的球差，改善成像质量。在另一些实施例中，光学系统100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100中各透镜的表面可以是非球面或球面的任意组合。
在一些实施例中，光学系统100中的各透镜的材质可以均为玻璃或均为塑料。采用塑料材质的透镜能够减少光学系统100的重量并降低生产成本，配合光学系统的较小尺寸以实现光学系统的轻小型化设计。而采用玻璃材质的透镜使光学系统100具备优良的光学性能以及较高的耐温性能。需要注意的是，光学系统100中各透镜的材质也可以为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。
需要注意的是，第一透镜L1并不意味着只存在一片透镜，在一些实施例中，第一透镜L1中也可以存在两片或多片透镜，两片或多片透镜能够形成胶合透镜，胶合透镜最靠近物侧的表面可视为物侧面S1，最 靠近像侧的表面可视为像侧面S2。或者，第一透镜L1中的各透镜之间并不形成胶合透镜，但各透镜之间的距离相对固定，此时最靠近物侧的透镜的物侧面为物侧面S1，最靠近像侧的透镜的像侧面为像侧面S2。另外，一些实施例中的第二透镜L2、第三透镜L3、第四透镜L4、第五透镜L5、第六透镜L6或第七透镜L7中的透镜数量也可大于或等于两片，且任意相邻透镜之间可以形成胶合透镜，也可以为非胶合透镜。
进一步地，在一些实施例中，光学系统100满足条件式：|SAG1/f1|*100≤2；其中，SAG1为第一透镜L1的物侧面S1的最大有效通光口径处的矢高，f1为第一透镜L1的有效焦距。具体地，|SAG1/f1|*100可以为：0.5、0.6、0.7、0.8、0.9、1.0、1.1或1.2。满足以上条件式时，第一透镜L1的物侧面S1趋于平缓，从而有利于缩短第一透镜L1于光轴110方向上的尺寸，进而缩短光学系统100的系统总长，实现光学系统100的小型化设计。同时，第一透镜L1的物侧面S1的面型平缓，弯曲度小，有利于第一透镜L1的注塑成型。当超过上述条件式的上限时，第一透镜L1的物侧面S1的矢高过大，面型过于弯曲，导致第一透镜L1于光轴110方向上的尺寸过大，进而使第一透镜L1占据过大的空间，阻碍光学系统100的系统总长缩小，从而不利于光学系统100的小型化设计。
在一些实施例中，光学系统100满足条件式：TTL/ImgH≤1.7；其中，TTL为第一透镜L1的物侧面S1至光学系统100的成像面于光轴110上的距离，ImgH为光学系统100的最大视场角所对应的像高的一半。具体地，TTL/ImgH可以为：1.514、1.532、1.539、1.554、1.562、1.593、1.605、1.633、1.656或1.670。满足以上条件式时，能够对光学系统100的光学总长以及半像高的比值进行合理配置，从而有效压缩光学系统100的系统总长，有利于光学系统100的小型化设计。另外，ImgH决定光学系统100的成像尺寸大小，满足以上条件式时，系统可匹配大尺寸的感光元件，从而可实现大像面、高像素摄像。当超过上述条件式的上限时，光学系统100的系统总长过长，不利于光学系统100的小型化设计，使光学系统100难以匹配超薄电子设备。
在一些实施例中，光学系统100满足条件式：1.7≤FNO/tan(HFOV)≤2.0；其中，FNO为光学系统100的光圈数，HFOV为光学系统100的最大视场角的一半。具体地，FNO/tan(HFOV)可以为：1.797、1.803、1.825、1.866、1.876、1.899、1.925、1.964、1.977或1.987。满足以上条件式时，能够对光学系统100的光圈数及视场角进行合理配置，使得光学系统100具有大光圈，有利于校正光学系统100的像差，提升光学系统100的成像质量。当超过上述条件式的上限时，光学系统100的光圈数过大，进光量减小，容易降低光学系统100于弱光线的环境下的成像质量。当低于上述条件式的下限，光学系统100的光圈数过小，从而使光阑的有效通光口径过大，难以对视场的边缘光线形成有效调节，从而不利于校正光学系统100的像差。
需要说明的是，在本申请中，光学系统100可以匹配具有矩形感光面的感光元件，光学系统100的成像面与感光元件的感光面重合。此时，光学系统100成像面上有效像素区域具有水平方向以及对角线方向，则ImgH可以理解为光学系统100成像面上有效像素区域对角线方向的长度的一半，HFOV可理解为光学系统100对角线方向的最大视场角的一半。
在一些实施例中，光学系统100满足条件式：90≤V3+V4+V5≤110；其中，V3为第三透镜L3于d线下的阿贝数，V4为第四透镜L4于d线下的阿贝数，V5为第五透镜L5于d线下的阿贝数，即V3、V4、V5分别为第三透镜L3、第四透镜L4和第五透镜L5在参考波长为587.56nm下的阿贝数。具体地，V3+V4+V5可以为：98.888、99.125、101.552、102.376、103.645、105.285、106.968、107.332、107.453或108.279。满足以上条件式时，能够对第三透镜L3、第四透镜L4及第五透镜L5的阿贝数进行合理配置，从而有效修正光学系统100的色差，提高光学系统100的成像质量。当低于上述条件式的下限，第三透镜L3、第四透镜L4及第五透镜L5的阿贝数过小，第三透镜L3、第四透镜L4及第五透镜L5对色差的校正不充分，容易导致光学系统100的成像质量降低。当超过上述条件式的上限，第三透镜L3、第四透镜L4及第五透镜L5的阿贝数过大，导致光学系统100的成本增加。
在一些实施例中，光学系统100满足条件式：1.8≤f2/R3≤2.0；其中，f2为第二透镜L2的有效焦距，R3为第二透镜L2的物侧面S3于光轴110处的曲率半径。具体地，f2/R3可以为：1.836、1.852、1.864、1.882、1.893、1.905、1.965、1.973、1.979或1.987。满足以上条件式时，第二透镜L2为光学系统100提供足够的正屈折力，有利于缩短光学系统100的系统总长，同时，第二透镜L2的屈折力不会过强，有利于校正光学系统100的球差。超过上述条件式的上限时，第二透镜L2的有效焦距过长，正屈 折力过弱，不利于缩短光学系统100的系统总长。低于上述条件式的下限时，第二透镜L2的正屈折力过强，导致光学系统100的球差校正困难，不利于提升光学系统100的成像质量。
在一些实施例中，光学系统100满足条件式：2.5≤CT2/CT1≤3.5；其中，CT2为第二透镜L2于光轴110上的厚度，即第二透镜L2的中心厚度，CT1为第一透镜L1于光轴110上的厚度，即第一透镜L1的中心厚度。具体地，CT2/CT1可以为：2.529、2.616、2.751、2.863、2.964、3.021、3.112、3.220、3.365、或3.486。满足以上条件式时，第一透镜L1于光轴110上的厚度小，面型平缓，有利于减小第一透镜L1在光学系统100中的空间占比，进而有利于光学系统100的小型化设计。超过上述条件式的上限时，第二透镜L2于光轴110上的尺寸过大，不利于光学系统100的小型化设计。低于上述条件式的下限，第一透镜L1于光轴110上的尺寸过大，导致光学系统100的系统总长增加，不利于光学系统100的小型化设计。
在一些实施例中，光学系统100满足条件式：-10≤(R7+R8)/(R7-R8)≤1.5；其中，R7为第四透镜L4的物侧面S7于光轴110处的曲率半径，R8为第四透镜L4的像侧面S8于光轴110处的曲率半径。具体地，(R7+R8)/(R7-R8)可以为：-9.820、-8.324、-7.635、-6.558、-5.374、-4.615、-3.669、-2.112、-1.036或1.339。第四透镜L4位于光学系统100的中间位置，满足以上条件式时，能够合理增大第四透镜L4的物侧面S7及像侧面S8的面型弯曲程度，有利于第四透镜L4配合光学系统100的其余透镜成像，进而有利于校正光学系统100的像差，提升光学系统100的成像质量。
在一些实施例中，光学系统100满足条件式：Y1/Y2≤1.5；其中，Y1为第一透镜L1的物侧面S1的最大有效通光口径的一半，Y2为第二透镜L2的物侧面S3的最大有效通光口径的一半。具体地，Y1/Y2可以为：1.373、1.376、1.380、1.388、1.392、1.395、1.401、1.405、1.411或1.425。满足以上条件式时，能够缩小第一透镜L1物侧面S1与第二透镜L2物侧面S3的最大有效通光口径之间的差异，从而使得光线进入光学系统100时偏折角度不会过大，有利于减少像差的产生。超过上述条件式的上限，第一透镜L1物侧面S1与第二透镜L2物侧面S3的最大有效通光口径差异过大，容易导致第一透镜L1及第二透镜L2的公差敏感度增大，进而降低第一透镜L1及第二透镜L2的成型良率。
在一些实施例中，光学系统100满足条件式：-0.65≤R12/f6≤-0.45；其中，R12为第六透镜L6的像侧面S12于光轴110处的曲率半径，f6为第六透镜L6的有效焦距。具体地，R12/f6可以为：-0.608、-0.595、-0.564、-5.551、-0.531、-0.523、-0.502、-4.998、-4.925或-0.487。第六透镜L6为光学系统100提供正屈折力，满足以上条件式时，第六透镜L6的像侧面S12于近光轴110处为凸面，有利于第六透镜L6与第七透镜L7相配合，以缩短光学系统100的后焦距，同时可有效校正光学系统100的畸变。
根据上述各实施例的描述，以下提出更为具体的实施例及附图予以详细说明。
第一实施例
请参见图1和图2，图1为第一实施例中的光学系统100的示意图，光学系统100由物侧至像侧依次包括具有负屈折力的第一透镜L1、具有正屈折力的第二透镜L2、具有负屈折力的第三透镜L3、具有正屈折力的第四透镜L4、具有负屈折力的第五透镜L5、具有正屈折力的第六透镜L6以及具有负屈折力的第七透镜L7。图2由左至右依次为第一实施例中光学系统100的球差、像散及畸变的曲线图，其中像散图和畸变图的参考波长为587.56nm(d线)，其他实施例相同。
第一透镜L1的物侧面S1于近光轴110处为凹面，于近圆周处为凸面；
第一透镜L1的像侧面S2于近光轴110处为凹面，于近圆周处为凹面；
第二透镜L2的物侧面S3于近光轴110处为凸面，于近圆周处为凸面；
第二透镜L2的像侧面S4于近光轴110处为凸面，于近圆周处为凹面；
第三透镜L3的物侧面S5于近光轴110处为凸面，于近圆周处为凸面；
第三透镜L3的像侧面S6于近光轴110处为凹面，于近圆周处为凹面；
第四透镜L4的物侧面S7于近光轴110处为凹面，于近圆周处为凹面；
第四透镜L4的像侧面S8于近光轴110处为凸面，于近圆周处为凸面；
第五透镜L5的物侧面S9于近光轴110处为凹面，于近圆周处为凹面；
第五透镜L5的像侧面S10于近光轴110处为凸面，于近圆周处为凸面；
第六透镜L6的物侧面S11于近光轴110处为凹面，于近圆周处为凸面；
第六透镜L6的像侧面S12于近光轴110处为凸面，于近圆周处为凹面；
第七透镜L7的物侧面S13于近光轴110处为凸面，于近圆周处为凹面；
第七透镜L7的像侧面S14于近光轴110处为凹面，于近圆周处为凸面。
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以及第七透镜L7的物侧面和像侧面均为非球面。
需要注意的是，在本申请中，当描述透镜的一个表面于近光轴110处(该表面的中心区域)为凸面时，可理解为该透镜的该表面于光轴110附近的区域为凸面。当描述透镜的一个表面于近圆周处为凹面时，可理解为该表面在靠近最大有效半径处的区域为凹面。举例而言，当该表面于近光轴110处为凸面，且于圆周处也为凸面时，该表面由中心(该表面与光轴110的交点)至边缘方向的形状可以为纯粹的凸面；或者是先由中心区域的凸面形状过渡到凹面形状，随后在靠近最大有效半径处时变为凸面。此处仅为说明光轴110处与圆周处的关系而做出的示例，表面的多种形状结构(凹凸关系)并未完全体现，但其他情况可根据以上示例推导得出。
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以及第七透镜L7的材质均为塑料。
进一步地，光学系统100满足条件式：|SAG1/f1|*100＝0.8；其中，SAG1为第一透镜L1的物侧面S1的最大有效通光口径处的矢高，f1为第一透镜L1的有效焦距。满足以上条件式时，第一透镜L1的物侧面S1趋于平缓，从而有利于缩短第一透镜L1于光轴110方向上的尺寸，进而缩短光学系统100的系统总长，实现光学系统100的小型化设计。同时，第一透镜L1的物侧面S1的面型平缓，弯曲度小，有利于第一透镜L1的注塑成型。
光学系统100满足条件式：TTL/ImgH＝1.559；其中，TTL为第一透镜L1的物侧面S1至光学系统100的成像面于光轴110上的距离，ImgH为光学系统100的最大视场角所对应的像高的一半。满足以上条件式时，能够对光学系统100的光学总长以及半像高的比值进行合理配置，从而有效压缩光学系统100的系统总长，有利于光学系统100的小型化设计。另外，ImgH决定光学系统100的成像尺寸大小，满足以上条件式时，系统可匹配大尺寸的感光元件，从而可实现大像面、高像素摄像。
光学系统100满足条件式：FNO/tan(HFOV)＝1.987；其中，FNO为光学系统100的光圈数，HFOV为光学系统100的最大视场角的一半。满足以上条件式时，能够对光学系统100的光圈数及视场角进行合理配置，使得光学系统100具有大光圈，有利于校正光学系统100的像差，提升光学系统100的成像质量。同时，光学系统100的光圈数不会过大，保证光学系统100具有足够的进光量，进而提升光学系统100于弱光线的环境下的成像质量。
光学系统100满足条件式：V3+V4+V5＝98.888；其中，V3为第三透镜L3于d线下的阿贝数，V4为第四透镜L4于d线下的阿贝数，V5为第五透镜L5于d线下的阿贝数。满足以上条件式时，能够对第三透镜L3、第四透镜L4及第五透镜L5的阿贝数进行合理配置，从而有效修正光学系统100的色差，提高光学系统100的成像质量。同时，第三透镜L3、第四透镜L4及第五透镜L5的阿贝数不会过大，有利于降低光学系统100的成本。
光学系统100满足条件式：f2/R3＝1.836；其中，f2为第二透镜L2的有效焦距，R3为第二透镜L2的物侧面S3于光轴110处的曲率半径。满足以上条件式时，第二透镜L2为光学系统100提供足够的正屈折力，有利于缩短光学系统100的系统总长，同时，第二透镜L2的屈折力不会过强，有利于校正光学系统100的球差。
光学系统100满足条件式：CT2/CT1＝3.055；其中，CT2为第二透镜L2于光轴110上的厚度，即第二透镜L2的中心厚度，CT1为第一透镜L1于光轴110上的厚度，即第一透镜L1的中心厚度。满足以上条件式时，第一透镜L1于光轴110上的厚度小，面型平缓，有利于减小第一透镜L1在光学系统100中的空间占比，进而有利于光学系统100的小型化设计。
光学系统100满足条件式：(R7+R8)/(R7-R8)＝1.027；其中，R7为第四透镜L4的物侧面S7于光轴110处的曲率半径，R8为第四透镜L4的像侧面S8于光轴110处的曲率半径。第四透镜L4位于光学系统100的中间位置，满足以上条件式时，能够合理增大第四透镜L4的物侧面S7及像侧面S8的面型弯曲程度，有利于第四透镜L4配合光学系统100的其余透镜成像，进而有利于校正光学系统100的像差，提升光学系统100的成像质量。
光学系统100满足条件式：Y1/Y2＝1.383；其中，Y1为第一透镜L1的物侧面S1的最大有效通光口径的一半，Y2为第二透镜L2的物侧面S3的最大有效通光口径的一半。满足以上条件式时，能够缩小第一透镜L1及第二透镜L2的物侧面的最大有效通光口径之间的差异，从而使得光线进入光学系统100时偏折角度不会过大，有利于减小像差的产生，同时也能够降低第一透镜L1及第二透镜L2的公差敏感度，提升第一透镜L1及第二透镜L2的成型良率。
光学系统100满足条件式：R12/f6＝-0.487；其中，R12为第六透镜L6的像侧面S12于光轴110处的曲率半径，f6为第六透镜L6的有效焦距。第六透镜L6为光学系统100提供正屈折力，满足以上条件式时，第六透镜L6的像侧面S12于近光轴110处为凸面，有利于第六透镜L6与第七透镜L7相配合，以缩短光学系统100的后焦距，同时有效校正光学系统100的畸变。
另外，光学系统100的各项参数由表1给出。其中，表1中的像面S17可理解为光学系统100的成像面。由物面(图未示出)至像面S17的各元件依次按照表1从上至下的各元件的顺序排列。表1中的Y半径为相应面序号的物侧面或像侧面于光轴110处的曲率半径。面序号1和面序号2分别为第一透镜L1的物侧面S1和像侧面S2，即同一透镜中，面序号较小的表面为物侧面，面序号较大的表面为像侧面。第一透镜L1的“厚度”参数列中的第一个数值为该透镜于光轴110上的厚度，第二个数值为该透镜的像侧面至像侧方向的后一表面于光轴110上的距离。
需要注意的是，在该实施例及以下各实施例中，光学系统100也可不设置红外滤光片L8，但此时第七透镜L7的像侧面S14至像面S17的距离保持不变。
在第一实施例中，光学系统100的总有效焦距f＝4.88mm，光圈数FNO＝1.776，最大视场角的一半HFOV＝41.8°，光学系统100的光学总长TTL＝7.0mm。
且各透镜的焦距、折射率和阿贝数的参考波长均为587.56nm(d线)，其他实施例也相同。
表1
Figure PCTCN2020142404-appb-000001
进一步地，光学系统100各透镜像侧面或物侧面的非球面系数由表2给出。其中，面序号从1-14分别表示像侧面或物侧面S1-S14。而从上到下的K-A20分别表示非球面系数的类型，其中，K表示圆锥系数，A4表示四次非球面系数，A6表示六次非球面系数，A8表示八次非球面系数，以此类推。另外，非球面系数可以使用但不限于如下公式：
Figure PCTCN2020142404-appb-000002
其中，Z为非球面上相应点到与表面顶点相切的平面于光轴110方向上的距离，r为非球面上相应点到光轴110的垂直距离，c为非球面顶点的曲率，k为圆锥系数，Ai为非球面面型公式中与第i项高次项相对应的系数。
表2
Figure PCTCN2020142404-appb-000003
另外，图2包括光学系统100的纵向球面像差图(Longitudinal Spherical Aberration)，其表示不同波长的光线经由镜头后的汇聚焦点偏离。纵向球面像差图的纵坐标表示归一化的由光瞳中心至光瞳边缘的光瞳坐标(Normalized Pupil Coordinator)，横坐标表示成像面到光线与光轴110交点的距离(单位为mm)。由纵向球面像差图可知，第一实施例中的各波长光线的汇聚焦点偏离程度趋于一致，成像画面中的弥散斑或色晕得到有效抑制。图2还包括光学系统100的场曲图(ASTIGMATIC FIELD CURVES)，其中S曲线代表587.56nm下的弧矢场曲，T曲线代表587.56nm下的子午场曲。由图中可知，光学系统100的场曲较小，各视场的场曲和像散均得到了良好的校正，视场中心和边缘均拥有清晰的成像。图2还包括光学系统100的畸变图(DISTORTION)，由图中可知，由主光束引起的图像变形较小，系统的成像质量优良。
第二实施例
请参见图3和图4，图3为第二实施例中的光学系统100的示意图，光学系统100由物侧至像侧依次包括具有负屈折力的第一透镜L1、具有正屈折力的第二透镜L2、具有负屈折力的第三透镜L3、具有正屈折力的第四透镜L4、具有负屈折力的第五透镜L5、具有正屈折力的第六透镜L6以及具有负屈折力的第七透镜L7。图4由左至右依次为第二实施例中光学系统100的球差、像散及畸变的曲线图。
第一透镜L1的物侧面S1于近光轴110处为凹面，于近圆周处为凸面；
第一透镜L1的像侧面S2于近光轴110处为凹面，于近圆周处为凹面；
第二透镜L2的物侧面S3于近光轴110处为凸面，于近圆周处为凸面；
第二透镜L2的像侧面S4于近光轴110处为凹面，于近圆周处为凹面；
第三透镜L3的物侧面S5于近光轴110处为凸面，于近圆周处为凸面；
第三透镜L3的像侧面S6于近光轴110处为凹面，于近圆周处为凹面；
第四透镜L4的物侧面S7于近光轴110处为凸面，于近圆周处为凸面；
第四透镜L4的像侧面S8于近光轴110处为凸面，于近圆周处为凸面；
第五透镜L5的物侧面S9于近光轴110处为凹面，于近圆周处为凹面；
第五透镜L5的像侧面S10于近光轴110处为凹面，于近圆周处为凸面；
第六透镜L6的物侧面S11于近光轴110处为凹面，于近圆周处为凹面；
第六透镜L6的像侧面S12于近光轴110处为凸面，于近圆周处为凸面；
第七透镜L7的物侧面S13于近光轴110处为凸面，于近圆周处为凹面；
第七透镜L7的像侧面S14于近光轴110处为凹面，于近圆周处为凸面。
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以及第七透镜L7的物侧面和像侧面均为非球面。
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以及第七透镜L7的材质均为塑料。
另外，光学系统100的各项参数由表3给出，且其中各参数的定义可由第一实施例得出，此处不加以赘述。
表3
Figure PCTCN2020142404-appb-000004
进一步地，光学系统100各透镜像侧面或物侧面的非球面系数由表4给出，且其中各参数的定义可由第一实施例得出，此处不加以赘述。
表4
Figure PCTCN2020142404-appb-000005
Figure PCTCN2020142404-appb-000006
并且，根据上述所提供的各参数信息，可推得以下数据：
|SAG1/f1|*100 1.1 CT2/CT1 2.529
TTL/ImgH 1.670 (R7+R8)/(R7-R8) -0.584
FNO/tan(HFOV) 1.987 Y1/Y2 1.425
V3+V4+V5 98.888 R12/f6 -0.493
f2/R3 1.891    
另外，由图4中的像差图可知，光学系统100的纵向球差、场曲和畸变均得到良好的控制，从而该实施例的光学系统100拥有良好的成像品质。
第三实施例
请参见图5和图6，图5为第三实施例中的光学系统100的示意图，光学系统100由物侧至像侧依次包括具有负屈折力的第一透镜L1、具有正屈折力的第二透镜L2、具有正屈折力的第三透镜L3、具有正屈折力的第四透镜L4、具有负屈折力的第五透镜L5、具有正屈折力的第六透镜L6以及具有负屈折力的第七透镜L7。图6由左至右依次为第三实施例中光学系统100的球差、像散及畸变的曲线图。
第一透镜L1的物侧面S1于近光轴110处为凹面，于近圆周处为凸面；
第一透镜L1的像侧面S2于近光轴110处为凹面，于近圆周处为凹面；
第二透镜L2的物侧面S3于近光轴110处为凸面，于近圆周处为凸面；
第二透镜L2的像侧面S4于近光轴110处为凹面，于近圆周处为凹面；
第三透镜L3的物侧面S5于近光轴110处为凸面，于近圆周处为凸面；
第三透镜L3的像侧面S6于近光轴110处为凹面，于近圆周处为凹面；
第四透镜L4的物侧面S7于近光轴110处为凹面，于近圆周处为凹面；
第四透镜L4的像侧面S8于近光轴110处为凸面，于近圆周处为凸面；
第五透镜L5的物侧面S9于近光轴110处为凹面，于近圆周处为凹面；
第五透镜L5的像侧面S10于近光轴110处为凸面，于近圆周处为凸面；
第六透镜L6的物侧面S11于近光轴110处为凹面，于近圆周处为凸面；
第六透镜L6的像侧面S12于近光轴110处为凸面，于近圆周处为凸面；
第七透镜L7的物侧面S13于近光轴110处为凸面，于近圆周处为凹面；
第七透镜L7的像侧面S14于近光轴110处为凹面，于近圆周处为凸面。
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以及第七透镜L7的物侧面和像侧面均为非球面。
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以及第七透镜L7 的材质均为塑料。
另外，光学系统100的各项参数由表5给出，且其中各参数的定义可由第一实施例得出，此处不加以赘述。
表5
Figure PCTCN2020142404-appb-000007
进一步地，光学系统100各透镜像侧面或物侧面的非球面系数由表6给出，且其中各参数的定义可由第一实施例得出，此处不加以赘述。
表6
Figure PCTCN2020142404-appb-000008
Figure PCTCN2020142404-appb-000009
并且，根据上述所提供的各参数信息，可推得以下数据：
|SAG1/f1|*100 1.0 CT2/CT1 3.005
TTL/ImgH 1.604 (R7+R8)/(R7-R8) 1.339
FNO/tan(HFOV) 1.965 Y1/Y2 1.405
V3+V4+V5 98.888 R12/f6 -0.522
f2/R3 1.987    
另外，由图6中的像差图可知，光学系统100的纵向球差、场曲和畸变均得到良好的控制，从而该实施例的光学系统100拥有良好的成像品质。
第四实施例
请参见图7和图8，图7为第四实施例中的光学系统100的示意图，光学系统100由物侧至像侧依次包括具有负屈折力的第一透镜L1、具有正屈折力的第二透镜L2、具有负屈折力的第三透镜L3、具有正屈折力的第四透镜L4、具有负屈折力的第五透镜L5、具有正屈折力的第六透镜L6以及具有负屈折力的第七透镜L7。图8由左至右依次为第四实施例中光学系统100的球差、像散及畸变的曲线图。
第一透镜L1的物侧面S1于近光轴110处为凹面，于近圆周处为凸面；
第一透镜L1的像侧面S2于近光轴110处为凹面，于近圆周处为凹面；
第二透镜L2的物侧面S3于近光轴110处为凸面，于近圆周处为凸面；
第二透镜L2的像侧面S4于近光轴110处为凹面，于近圆周处为凹面；
第三透镜L3的物侧面S5于近光轴110处为凸面，于近圆周处为凸面；
第三透镜L3的像侧面S6于近光轴110处为凹面，于近圆周处为凹面；
第四透镜L4的物侧面S7于近光轴110处为凸面，于近圆周处为凹面；
第四透镜L4的像侧面S8于近光轴110处为凸面，于近圆周处为凸面；
第五透镜L5的物侧面S9于近光轴110处为凹面，于近圆周处为凹面；
第五透镜L5的像侧面S10于近光轴110处为凹面，于近圆周处为凸面；
第六透镜L6的物侧面S11于近光轴110处为凸面，于近圆周处为凹面；
第六透镜L6的像侧面S12于近光轴110处为凸面，于近圆周处为凹面；
第七透镜L7的物侧面S13于近光轴110处为凹面，于近圆周处为凹面；
第七透镜L7的像侧面S14于近光轴110处为凹面，于近圆周处为凸面。
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以及第七透镜L7的物侧面和像侧面均为非球面。
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以及第七透镜L7的材质均为塑料。
另外，光学系统100的各项参数由表7给出，且其中各参数的定义可由第一实施例得出，此处不加以赘述。
表7
Figure PCTCN2020142404-appb-000010
Figure PCTCN2020142404-appb-000011
进一步地，光学系统100各透镜像侧面或物侧面的非球面系数由表8给出，且其中各参数的定义可由第一实施例得出，此处不加以赘述。
表8
Figure PCTCN2020142404-appb-000012
并且，根据上述所提供的各参数信息，可推得以下数据：
|SAG1/f1|*100 0.5 CT2/CT1 3.064
TTL/ImgH 1.581 (R7+R8)/(R7-R8) 0.886
FNO/tan(HFOV) 1.889 Y1/Y2 1.373
V3+V4+V5 101.841 R12/f6 -0.608
f2/R3 1.870    
另外，由图8中的像差图可知，光学系统100的纵向球差、场曲和畸变均得到良好的控制，从而该实施例的光学系统100拥有良好的成像品质。
第五实施例
请参见图9和图10，图9为第五实施例中的光学系统100的示意图，光学系统100由物侧至像侧依次包括具有负屈折力的第一透镜L1、具有正屈折力的第二透镜L2、具有负屈折力的第三透镜L3、具有正屈折力的第四透镜L4、具有负屈折力的第五透镜L5、具有正屈折力的第六透镜L6以及具有负屈折力的第七透镜L7。图10由左至右依次为第五实施例中光学系统100的球差、像散及畸变的曲线图。
第一透镜L1的物侧面S1于近光轴110处为凹面，于近圆周处为凸面；
第一透镜L1的像侧面S2于近光轴110处为凹面，于近圆周处为凹面；
第二透镜L2的物侧面S3于近光轴110处为凸面，于近圆周处为凸面；
第二透镜L2的像侧面S4于近光轴110处为凹面，于近圆周处为凸面；
第三透镜L3的物侧面S5于近光轴110处为凸面，于近圆周处为凸面；
第三透镜L3的像侧面S6于近光轴110处为凹面，于近圆周处为凹面；
第四透镜L4的物侧面S7于近光轴110处为凸面，于近圆周处为凸面；
第四透镜L4的像侧面S8于近光轴110处为凹面，于近圆周处为凸面；
第五透镜L5的物侧面S9于近光轴110处为凸面，于近圆周处为凹面；
第五透镜L5的像侧面S10于近光轴110处为凹面，于近圆周处为凸面；
第六透镜L6的物侧面S11于近光轴110处为凸面，于近圆周处为凹面；
第六透镜L6的像侧面S12于近光轴110处为凸面，于近圆周处为凸面；
第七透镜L7的物侧面S13于近光轴110处为凹面，于近圆周处为凹面；
第七透镜L7的像侧面S14于近光轴110处为凹面，于近圆周处为凸面。
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以及第七透镜L7的物侧面和像侧面均为非球面。
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以及第七透镜L7的材质均为塑料。
另外，光学系统100的各项参数由表9给出，且其中各参数的定义可由第一实施例得出，此处不加以赘述。
表9
Figure PCTCN2020142404-appb-000013
Figure PCTCN2020142404-appb-000014
进一步地，光学系统100各透镜像侧面或物侧面的非球面系数由表10给出，且其中各参数的定义可由第一实施例得出，此处不加以赘述。
表10
Figure PCTCN2020142404-appb-000015
并且，根据上述所提供的各参数信息，可推得以下数据：
|SAG1/f1|*100 0.8 CT2/CT1 3.286
TTL/ImgH 1.605 (R7+R8)/(R7-R8) -7.485
FNO/tan(HFOV) 1.899 Y1/Y2 1.381
V3+V4+V5 105.037 R12/f6 -0.573
f2/R3 1.856    
另外，由图10中的像差图可知，光学系统100的纵向球差、场曲和畸变均得到良好的控制，从而该实施例的光学系统100拥有良好的成像品质。
第六实施例
请参见图11和图12，图11为第六实施例中的光学系统100的示意图，光学系统100由物侧至像侧依次包括具有负屈折力的第一透镜L1、具有正屈折力的第二透镜L2、具有负屈折力的第三透镜L3、具有正屈折力的第四透镜L4、具有正屈折力的第五透镜L5、具有正屈折力的第六透镜L6以及具有负屈折力的第七透镜L7。图12由左至右依次为第六实施例中光学系统100的球差、像散及畸变的曲线图。
第一透镜L1的物侧面S1于近光轴110处为凹面，于近圆周处为凸面；
第一透镜L1的像侧面S2于近光轴110处为凹面，于近圆周处为凹面；
第二透镜L2的物侧面S3于近光轴110处为凸面，于近圆周处为凸面；
第二透镜L2的像侧面S4于近光轴110处为凹面，于近圆周处为凹面；
第三透镜L3的物侧面S5于近光轴110处为凸面，于近圆周处为凸面；
第三透镜L3的像侧面S6于近光轴110处为凹面，于近圆周处为凹面；
第四透镜L4的物侧面S7于近光轴110处为凸面，于近圆周处为凸面；
第四透镜L4的像侧面S8于近光轴110处为凹面，于近圆周处为凹面；
第五透镜L5的物侧面S9于近光轴110处为凸面，于近圆周处为凹面；
第五透镜L5的像侧面S10于近光轴110处为凹面，于近圆周处为凸面；
第六透镜L6的物侧面S11于近光轴110处为凸面，于近圆周处为凸面；
第六透镜L6的像侧面S12于近光轴110处为凸面，于近圆周处为凸面；
第七透镜L7的物侧面S13于近光轴110处为凹面，于近圆周处为凹面；
第七透镜L7的像侧面S14于近光轴110处为凹面，于近圆周处为凸面。
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以及第七透镜L7的物侧面和像侧面均为非球面。
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以及第七透镜L7的材质均为塑料。
另外，光学系统100的各项参数由表11给出，且其中各参数的定义可由第一实施例得出，此处不加以赘述。
表11
Figure PCTCN2020142404-appb-000016
进一步地，光学系统100各透镜像侧面或物侧面的非球面系数由表12给出，且其中各参数的定义可由第一实施例得出，此处不加以赘述。
表12
Figure PCTCN2020142404-appb-000017
Figure PCTCN2020142404-appb-000018
并且，根据上述所提供的各参数信息，可推得以下数据：
|SAG1/f1|*100 1.2 CT2/CT1 3.486
TTL/ImgH 1.514 (R7+R8)/(R7-R8) -9.820
FNO/tan(HFOV) 1.797 Y1/Y2 1.387
V3+V4+V5 108.279 R12/f6 -0.563
f2/R3 1.838    
另外，由图12中的像差图可知，光学系统100的纵向球差、场曲和畸变均得到良好的控制，从而该实施例的光学系统100拥有良好的成像品质。
请参见图13，在一些实施例中，光学系统100可与感光元件210组装形成取像模组200。此时，感光元件210的感光面可视为光学系统100的像面S17。取像模组200还可设置有红外滤光片L8，红外滤光片L8设置于第七透镜L7的像侧面S14与像面S17之间。具体地，感光元件210可以为电荷耦合元件(Charge Coupled Device，CCD)或互补金属氧化物半导体器件(Complementary Metal-Oxide Semiconductor Sensor，CMOS Sensor)。在取像模组200中采用上述光学系统100，有利于减小光学系统100的系统总长，从而有利于取像模组200的小型化设计。
请参见图13和图14，在一些实施例中，取像模组200可运用于电子设备300中，电子设备包括壳体310，取像模组200设置于壳体310。具体地，电子设备300可以为但不限于便携电话机、视频电话、智能手机、电子书籍阅读器、行车记录仪等车载摄像设备或智能手表等可穿戴装置。当电子设备300为智能手机时，壳体310可以为电子设备300的中框。在电子设备300中采用取像模组200，有利于电子设备300的小型化设计。
在本发明的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”“内”、“外”、“顺时针”、“逆时针”、“轴向”、“径向”、“周向”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。
此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括至少一个该特征。在本发明的描述中，“多个”的含义是至少两个，例如两个，三个等，除非另有明确具体的限定。
在本发明中，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”、“固定”等术语应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系，除非另有明确的限定。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本发明中的具体含义。
在本发明中，除非另有明确的规定和限定，第一特征在第二特征“上”或“下”可以是第一和第二特征直接接触，或第一和第二特征通过中间媒介间接接触。而且，第一特征在第二特征“之上”、“上方”和“上面”可是第一特征在第二特征正上方或斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”可以是第一特征在第二特征正下方或斜下方，或仅仅表示第一特征水平高度小于第二特征。
在本说明书的描述中，参考术语“一个实施例”、“一些实施例”、“示例”、“具体示例”、或“一些示例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或者特点包含于本发明的至少一个实施例或示例中。在本说明书中，对上述术语的示意性表述不必须针对的是相同的实施例或示例。而且，描述的具体特征、结构、材料或者特点可以在任一个或多个实施例或示例中以合适的方式结合。此外，在不相互矛盾的情况下，本领域的技术人员可以将本说明书中描述的不同实施例或示例以及不同实施例或示例的特征进行结合和组合。
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。

Claims (20)

  1. 一种光学系统，由物侧至像侧依次包括：
    具有负屈折力的第一透镜，所述第一透镜的物侧面于近光轴处为凹面；
    具有正屈折力的第二透镜，所述第二透镜的物侧面于近光轴处为凸面；
    具有屈折力的第三透镜，所述第三透镜的物侧面于近光轴处为凸面，像侧面于近光轴处为凹面；
    具有正屈折力的第四透镜；
    具有屈折力的第五透镜；
    具有正屈折力的第六透镜；
    具有负屈折力的第七透镜；
    且所述光学系统满足以下条件式：
    |SAG1/f1|*100≤2；
    其中，SAG1为所述第一透镜的物侧面的最大有效通光口径处的矢高，f1为所述第一透镜的有效焦距。
  2. 根据权利要求1所述的光学系统，其特征在于，满足以下条件式：
    TTL/ImgH≤1.7；
    其中，TTL为所述第一透镜的物侧面至所述光学系统的成像面于光轴上的距离，ImgH为所述光学系统的最大视场角所对应的像高的一半。
  3. 根据权利要求1所述的光学系统，其特征在于，满足以下条件式：
    1.7≤FNO/tan(HFOV)≤2.0；
    其中，FNO为所述光学系统的光圈数，HFOV为所述光学系统最大视场角的一半。
  4. 根据权利要求1所述的光学系统，其特征在于，满足以下条件式：
    90≤V3+V4+V5≤110；
    其中，V3为所述第三透镜于d线下的阿贝数，V4为所述第四透镜于d线下的阿贝数，V5为所述第五透镜于d线下的阿贝数。
  5. 根据权利要求1所述的光学系统，其特征在于，满足以下条件式：
    1.8≤f2/R3≤2.0；
    其中，f2为所述第二透镜的有效焦距，R3为所述第二透镜的物侧面于光轴处的曲率半径。
  6. 根据权利要求1所述的光学系统，其特征在于，满足以下条件式：
    2.5≤CT2/CT1≤3.5；
    其中，CT2为所述第二透镜于光轴上的厚度，CT1为所述第一透镜于光轴上的厚度。
  7. 根据权利要求1所述的光学系统，其特征在于，满足以下条件式：
    -10≤(R7+R8)/(R7-R8)≤1.5；
    其中，R7为所述第四透镜的物侧面于光轴处的曲率半径，R8为所述第四透镜的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，满足以下条件式：
    Y1/Y2≤1.5；
    其中，Y1为所述第一透镜的物侧面的最大有效通光口径的一半，Y2为所述第二透镜的物侧面的最大有效通光口径的一半。
  9. 根据权利要求1所述的光学系统，其特征在于，满足以下条件式：
    -0.65≤R12/f6≤-0.45；
    其中，R12为所述第六透镜的像侧面于光轴处的曲率半径，f6为所述第六透镜的有效焦距。
  10. 根据权利要求1-9任一项所述的光学系统，其特征在于，还包括光阑，所述光阑设置于所述第一透镜的物方或者所述第七透镜的像方。
  11. 根据权利要求1-9任一项所述的光学系统，其特征在于，还包括光阑，所述光阑设置于所述第一透镜至所第七透镜的任意两个透镜之间。
  12. 根据权利要求11所述的光学系统，其特征在于，所述光阑设置于所述第二透镜和所述第三透镜之间。
  13. 根据权利要求12所述的光学系统，其特征在于，所述光阑设置于所述第二透镜的像侧面。
  14. 根据权利要求1-9任一项所述的光学系统，其特征在于，还包括红外滤光片，所述红外滤光片设置于所述第七透镜的像方。
  15. 根据权利要求1-9任一项所述的光学系统，其特征在于，所述光学系统中各透镜的物侧面及像侧面均为非球面。
  16. 根据权利要求1-9任一项所述的光学系统，其特征在于，所述光学系统中各透镜的材质均为塑料。
  17. 根据权利要求1-9任一项所述的光学系统，其特征在于，所述光学系统中各透镜的材质均为玻璃。
  18. 一种取像模组，包括感光元件以及权利要求1-17任一项所述的光学系统，所述感光元件设置于所述光学系统的像侧。
  19. 根据权利要求18所述的取像模组，其特征在于，所述感光元件为电荷耦合元件或互补金属氧化物半导体器件。
  20. 一种电子设备，包括壳体以及权利要求19所述的取像模组，所述取像模组设置于所述壳体。
PCT/CN2020/142404 2020-12-31 2020-12-31 光学系统、取像模组及电子设备 WO2022141514A1 (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2020/142404 WO2022141514A1 (zh) 2020-12-31 2020-12-31 光学系统、取像模组及电子设备

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2020/142404 WO2022141514A1 (zh) 2020-12-31 2020-12-31 光学系统、取像模组及电子设备

Publications (1)

Publication Number Publication Date
WO2022141514A1 true WO2022141514A1 (zh) 2022-07-07

Family

ID=82260116

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2020/142404 WO2022141514A1 (zh) 2020-12-31 2020-12-31 光学系统、取像模组及电子设备

Country Status (1)

Country Link
WO (1) WO2022141514A1 (zh)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160139372A1 (en) * 2014-11-17 2016-05-19 Fujifilm Corporation Imaging lens and imaging apparatus equipped with the imaging lens
CN110361854A (zh) * 2019-08-19 2019-10-22 浙江舜宇光学有限公司 光学成像系统
CN111123478A (zh) * 2020-01-15 2020-05-08 浙江舜宇光学有限公司 摄像镜头组
US20200355889A1 (en) * 2019-05-10 2020-11-12 Tamron Co., Ltd. Imaging optics and imaging device
CN112612117A (zh) * 2020-12-31 2021-04-06 江西晶超光学有限公司 光学系统、取像模组及电子设备

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160139372A1 (en) * 2014-11-17 2016-05-19 Fujifilm Corporation Imaging lens and imaging apparatus equipped with the imaging lens
US20200355889A1 (en) * 2019-05-10 2020-11-12 Tamron Co., Ltd. Imaging optics and imaging device
CN110361854A (zh) * 2019-08-19 2019-10-22 浙江舜宇光学有限公司 光学成像系统
CN111123478A (zh) * 2020-01-15 2020-05-08 浙江舜宇光学有限公司 摄像镜头组
CN112612117A (zh) * 2020-12-31 2021-04-06 江西晶超光学有限公司 光学系统、取像模组及电子设备

Similar Documents

Publication Publication Date Title
WO2021184165A1 (zh) 光学系统、摄像模组及电子装置
CN113552696B (zh) 光学系统、取像模组及电子设备
CN113138458B (zh) 光学系统、取像模组及电子设备
EP4170407A1 (en) Seven-lens imaging objective
CN112612117A (zh) 光学系统、取像模组及电子设备
CN113946038B (zh) 光学镜头、摄像模组及电子设备
CN112630933A (zh) 光学系统、摄像模组及电子设备
CN110389424B (zh) 摄像光学镜头
CN214151197U (zh) 光学系统、摄像模组及电子设备
CN113376810A (zh) 光学系统、取像模组及电子设备
CN113189748A (zh) 光学系统、取像模组及电子设备
CN109839727B (zh) 摄像光学镜头
CN114675407B (zh) 光学系统、镜头模组及电子设备
CN115480365B (zh) 光学系统、取像模组及电子设备
CN108681046B (zh) 摄像光学镜头
CN114326019B (zh) 光学系统、取像模组及电子设备
CN113900226B (zh) 光学系统、取像模组及电子设备
CN110927924A (zh) 光学摄像镜头组、取像模组和电子装置
CN114994880A (zh) 光学系统、镜头模组及电子设备
WO2022120678A1 (zh) 光学系统、取像模组及电子设备
WO2022160121A1 (zh) 光学成像镜头、取像装置及电子设备
WO2022151157A1 (zh) 光学系统、取像模组及电子设备
CN114755803A (zh) 光学镜头、摄像模组及电子设备
CN213182173U (zh) 光学系统、取像模组及电子设备
CN110955027B (zh) 摄像光学镜头

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: 20967852

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: 20967852

Country of ref document: EP

Kind code of ref document: A1