WO2020073702A1 - Ensemble de lentilles d'imagerie optique - Google Patents

Ensemble de lentilles d'imagerie optique Download PDF

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Publication number
WO2020073702A1
WO2020073702A1 PCT/CN2019/095359 CN2019095359W WO2020073702A1 WO 2020073702 A1 WO2020073702 A1 WO 2020073702A1 CN 2019095359 W CN2019095359 W CN 2019095359W WO 2020073702 A1 WO2020073702 A1 WO 2020073702A1
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Prior art keywords
lens
optical imaging
imaging lens
object side
lens group
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PCT/CN2019/095359
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English (en)
Chinese (zh)
Inventor
李龙
吕赛锋
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浙江舜宇光学有限公司
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Publication of WO2020073702A1 publication Critical patent/WO2020073702A1/fr

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • 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
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
    • G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
    • G02B13/0045—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having five or more lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration

Definitions

  • the present application relates to an optical imaging lens group, and more specifically, the present application relates to an optical imaging lens group including eight lenses.
  • the present application provides an optical imaging lens set applicable to portable electronic products, which can at least solve or partially solve the above-mentioned at least one disadvantage in the prior art.
  • the present application provides an optical imaging lens group, the optical imaging lens group including, in order from the object side to the image side along the optical axis: a first lens, a second lens, a third lens, a fourth lens, The fifth lens, the sixth lens, the seventh lens, and the eighth lens.
  • the first lens has positive power or negative power; the second lens can have positive power; the third lens has positive power or negative power; the fourth lens can have negative power; the fifth lens has positive power Power or negative power; the sixth lens has positive power or negative power, the object side can be concave and the image side can be convex; the seventh lens can have positive power; and the eighth lens has positive power Degrees or negative power.
  • the image side of the third lens may be convex.
  • the object side of the second lens may be convex.
  • the image side of the fourth lens may be concave.
  • the object side of the seventh lens may be convex.
  • the effective focal length f2 of the second lens and the effective focal length f7 of the seventh lens may satisfy 0 ⁇ f2 / f7 ⁇ 0.8.
  • the total effective focal length f of the optical imaging lens group and the effective focal length f4 of the fourth lens may satisfy -0.8 ⁇ f / f4 ⁇ 0.
  • the distance between the center thickness of the seventh lens on the optical axis CT7 and the object side of the first lens to the imaging surface of the optical imaging lens group on the optical axis TTL can satisfy 1.5 ⁇ CT7 / TTL ⁇ 10 ⁇ 2.5 .
  • the maximum effective radius DT61 of the object side of the sixth lens and the maximum effective radius DT71 of the object side of the seventh lens may satisfy 0.2 ⁇ DT61 / DT71 ⁇ 0.7.
  • the radius of curvature R1 of the object side of the first lens, the radius of curvature R2 of the image side of the first lens, and the effective focal length f1 of the first lens can satisfy 0 ⁇ (R1 + R2) /
  • the curvature radius R6 of the image side of the third lens and the effective focal length f3 of the third lens may satisfy 0 ⁇
  • the radius of curvature R15 of the object side of the eighth lens and the radius of curvature R16 of the image side of the eighth lens can satisfy -0.8 ⁇ R15 / R16 ⁇ -0.3.
  • the radius of curvature R12 of the image side of the sixth lens and the radius of curvature R11 of the object side of the sixth lens may satisfy 0.3 ⁇ R12 / R11 ⁇ 1.3.
  • the total effective focal length f of the optical imaging lens group and the entrance pupil diameter EPD of the optical imaging lens group can satisfy f / EPD ⁇ 2.0.
  • the maximum half angle of view HFOV of the optical imaging lens group may satisfy 40 ° ⁇ HFOV ⁇ 50 °.
  • the distance between the object side of the first lens and the imaging surface of the optical imaging lens group on the optical axis is TTL and the effective pixel area on the imaging surface of the optical imaging lens group is half the diagonal of ImgH. ImgH ⁇ 1.4.
  • the combined focal length f123456 of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens and the total effective focal length f of the optical imaging lens group can satisfy 1.0 ⁇ f123456 / f ⁇ 1.5.
  • the separation distance T67 between the sixth lens and the seventh lens on the optical axis and the separation distance T78 between the seventh lens and the eighth lens on the optical axis may satisfy 0.4 ⁇ T67 / T78 ⁇ 1.0.
  • This application uses eight lenses.
  • the above optical imaging lens group has ultra-thin and large light flux , Wide imaging range, miniaturization and other at least one beneficial effect.
  • FIGS. 2A to 2D respectively show an on-axis chromatic aberration curve, astigmatism curve, and distortion curve of the optical imaging lens group of Example 1. Magnification color difference curve;
  • FIG. 3 shows a schematic structural diagram of an optical imaging lens group according to Example 2 of the present application
  • FIGS. 4A to 4D show axial chromatic aberration curves, astigmatism curves, distortion curves, and Magnification color difference curve
  • FIG. 5 shows a schematic structural diagram of an optical imaging lens group according to Example 3 of the present application
  • FIGS. 6A to 6D respectively show an on-axis chromatic aberration curve, astigmatism curve, and distortion curve of the optical imaging lens group of Example 3
  • Magnification color difference curve
  • FIGS. 8A to 8D show axial chromatic aberration curves, astigmatism curves, and distortion curves of the optical imaging lens group of Example 4 and Magnification color difference curve;
  • FIGS. 10A to 10D show axial chromatic aberration curves, astigmatism curves, and distortion curves of the optical imaging lens group of Example 5 and Magnification color difference curve;
  • FIG 11 shows a schematic structural diagram of an optical imaging lens group according to Example 6 of the present application
  • FIGS. 12A to 12D respectively show an on-axis chromatic aberration curve, astigmatism curve, and distortion curve of the optical imaging lens group of Example 6; Magnification color difference curve;
  • FIG. 13 shows a schematic structural view of an optical imaging lens group according to Example 7 of the present application
  • FIGS. 14A to 14D respectively show an on-axis chromatic aberration curve, astigmatism curve, and distortion curve of the optical imaging lens group of Example 7; Magnification color difference curve;
  • FIG. 15 shows a schematic structural diagram of an optical imaging lens group according to Example 8 of the present application
  • FIGS. 16A to 16D show axial chromatic aberration curves, astigmatism curves, and distortion curves of the optical imaging lens group of Example 8 and Magnification color difference curve;
  • FIG. 17 shows a schematic structural diagram of an optical imaging lens group according to Example 9 of the present application
  • FIGS. 18A to 18D show on-axis chromatic aberration curves, astigmatism curves, and distortion curves of the optical imaging lens group of Example 9 and Magnification color difference curve;
  • FIGS. 20A to 20D respectively show an on-axis chromatic aberration curve, astigmatism curve, and distortion curve of the optical imaging lens group of Example 10; Magnification chromatic aberration curve.
  • first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation 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 thickness, size, and shape of the lens have been slightly exaggerated for ease of explanation.
  • the shape of the spherical surface or aspherical surface shown in the drawings is shown by way of example. That is, the shape of the spherical surface or aspherical surface is not limited to the shape of the spherical surface or aspherical surface shown in the drawings.
  • the drawings are only examples and are not strictly drawn to scale.
  • the paraxial region refers to the region near the optical axis. If the lens surface is convex and the convex position is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the concave position is not defined, it means that the lens surface is at least in the paraxial region. Concave. The surface of each lens closest to the object is called the object side of the lens, and the surface of each lens closest to the imaging surface is called the image side of the lens.
  • the optical imaging lens group may include, for example, eight lenses having optical power, that is, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, The seventh lens and the eighth lens.
  • the eight lenses are arranged in sequence along the optical axis from the object side to the image side, and each adjacent lens can have an air gap.
  • the first lens has positive power or negative power; the second lens may have positive power; the third lens has positive power or negative power, and its image side may be convex; The four lenses may have negative power; the fifth lens has positive power or negative power; the sixth lens has positive power or negative power, and the object side may be concave and the image side may be convex; seventh The lens may have positive power; the eighth lens has positive power or negative power.
  • the power distribution of the entire lens group avoids excessive concentration of power, and also helps balance the vertical and lateral chromatic aberrations of the lens group.
  • the image side of the third lens is designed to be convex, which can effectively cooperate with the first lens and the second lens to reduce the system spherical aberration and improve the system aberration correction ability.
  • the design of the sixth lens as a concave-convex structure can help expand the imaging range of the system, increase the image height, and realize the characteristics of the high image height of the system.
  • the object side of the first lens may be convex, and the image side may be concave.
  • the object side of the second lens may be convex.
  • the second lens can assume positive power, and can effectively reduce the aberration of the entire system, reduce the system sensitivity, improve the system yield, and also benefit the follow-up Processing and assembly of structures.
  • the image side of the fourth lens may be concave. Designing the image side of the fourth lens to be concave makes the fourth lens assume negative power, which helps to improve the aberration correction capability of the system.
  • the seventh lens object side surface may be convex. Designing the object side of the seventh lens as a convex surface allows the seventh lens to assume a certain degree of positive power, and can share part of the power of the system to avoid excessive concentration of power.
  • the eighth lens may have negative refractive power, and both the object side and the image side may be concave.
  • the optical imaging lens group of the present application may satisfy the conditional expression f / EPD ⁇ 2.0, where f is the total effective focal length of the optical imaging lens group, and EPD is the entrance pupil diameter of the optical imaging lens group. More specifically, f and EPD may further satisfy 1.6 ⁇ f / EPD ⁇ 2.0, for example, 1.70 ⁇ f / EPD ⁇ 1.98.
  • the control meets the conditional expression f / EPD ⁇ 2.0, which can effectively increase the light flux per unit time of the lens, make the lens have higher relative illuminance, and can better improve the imaging quality of the lens in a dark environment, making the lens more Practicality.
  • the optical imaging lens group of the present application may satisfy the conditional expression 40 ° ⁇ HFOV ⁇ 50 °, where HFOV is the maximum half angle of view of the optical imaging lens group. More specifically, HFOV may further satisfy 43 ° ⁇ HFOV ⁇ 48 °, for example, 45.2 ° ⁇ HFOV ⁇ 47.1 °.
  • the angle of view of the system By adjusting the angle of view of the system, the image height of the system can be improved while avoiding excessive aberrations in the edge field of view, which helps to better achieve the characteristics of a wide imaging range and high imaging quality.
  • the optical imaging lens group of the present application may satisfy the conditional expression 0 ⁇ f2 / f7 ⁇ 0.8, where f2 is the effective focal length of the second lens and f7 is the effective focal length of the seventh lens. More specifically, f2 and f7 may further satisfy 0.25 ⁇ f2 / f7 ⁇ 0.59.
  • the first function is to make the power of the lens group more reasonably distributed, so as not to be excessively concentrated on the seventh lens, which is conducive to improving the imaging quality of the system and Reduce the sensitivity of the system; the second role is to effectively maintain the ultra-thin characteristics of the lens group.
  • the optical imaging lens group of the present application may satisfy the conditional expression -0.8 ⁇ f / f4 ⁇ 0, where f is the total effective focal length of the optical imaging lens group, and f4 is the effective focal length of the fourth lens. More specifically, f and f4 may further satisfy -0.64 ⁇ f / f4 ⁇ -0.19.
  • the spherical aberration contribution of the fourth lens can be controlled within a reasonable range, so that the on-axis field of view of the optical system has a better Image quality.
  • the optical imaging lens group of the present application may satisfy the conditional expression 0 ⁇ (R1 + R2) /
  • Reasonable control of the radius of curvature and effective focal length of the object side and image side of the first lens can effectively reduce the size of the system, and can reasonably distribute the optical power of the system to avoid excessive concentration on the first lens, and also facilitate the correction
  • the aberration of the end lens is beneficial to the first lens to maintain good processability.
  • the optical imaging lens group of the present application may satisfy the conditional expression 0 ⁇
  • the astigmatism and coma contribution of the third lens can be controlled within a reasonable range, and the remaining astigmatism and coma of the front lens can be effectively balanced. So that the lens group has better imaging quality.
  • the optical imaging lens group of the present application may satisfy the conditional expression TTL / ImgH ⁇ 1.4, where TTL is the distance from the object side of the first lens to the imaging surface of the optical imaging lens group on the optical axis, ImgH It is half the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens group. More specifically, TTL and ImgH may further satisfy 1.0 ⁇ TTL / ImgH ⁇ 1.4, for example, 1.27 ⁇ TTL / ImgH ⁇ 1.35. Satisfying the conditional TTL / ImgH ⁇ 1.4 can effectively reduce the total size of the lens group, realize the ultra-thin characteristics and miniaturization of the lens group, thereby making the lens group better suitable for ultra-thin portable electronic products.
  • the optical imaging lens group of the present application may satisfy the conditional expression 0.3 ⁇ R12 / R11 ⁇ 1.3, where R12 is the radius of curvature of the image side of the sixth lens, and R11 is the curvature of the object side of the sixth lens radius. More specifically, R12 and R11 may further satisfy 0.54 ⁇ R12 / R11 ⁇ 1.14.
  • the optical imaging lens group of the present application may satisfy the conditional expression -0.8 ⁇ R15 / R16 ⁇ -0.3, where R15 is the curvature radius of the object side of the eighth lens and R16 is the image side of the eighth lens Radius of curvature. More specifically, R15 and R16 can further satisfy -0.71 ⁇ R15 / R16 ⁇ -0.41.
  • R15 and R16 can further satisfy -0.71 ⁇ R15 / R16 ⁇ -0.41.
  • the optical imaging lens group of the present application may satisfy the conditional expression 0.2 ⁇ DT61 / DT71 ⁇ 0.7, where DT61 is the maximum effective radius of the object side of the sixth lens and DT71 is the object effective side of the seventh lens Maximum effective radius. More specifically, DT61 and DT71 can further satisfy 0.35 ⁇ DT61 / DT71 ⁇ 0.65, for example 0.50 ⁇ DT61 / DT71 ⁇ 0.64. By reasonably controlling the effective radius of the sixth lens object side and the seventh lens object side, it can effectively increase the light flux of the lens group and increase the relative illuminance of the edge field of view of the system, so that the system can be in a dark environment It still has good imaging quality.
  • the optical imaging lens group of the present application may satisfy the conditional expression 1.5 ⁇ CT7 / TTL ⁇ 10 ⁇ 2.5, where CT7 is the center thickness of the seventh lens on the optical axis, and TTL is the object of the first lens The distance from the side to the imaging surface of the optical imaging lens group on the optical axis. More specifically, CT7 and TTL can further satisfy 1.74 ⁇ CT7 / TTL ⁇ 10 ⁇ 2.27. Reasonable control of the center thickness of the seventh lens on the optical axis is conducive to the miniaturization of the system and can reduce the risk of ghost images. At the same time, the fifth lens and the sixth lens can effectively reduce the chromatic aberration of the system, while The lens is too thin and the system performance is degraded.
  • the optical imaging lens group of the present application may satisfy the conditional expression 1.0 ⁇ f123456 / f ⁇ 1.5, where f123456 is a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and The combined focal length of the sixth lens, f is the total effective focal length of the optical imaging lens group. More specifically, f123456 and f can further satisfy 1.03 ⁇ f123456 / f ⁇ 1.20.
  • the optical power of the system is more distributed on the first lens to the sixth lens, which can better improve the aberration of the system Correction ability, while also effectively reducing the size of the lens group so that it can maintain ultra-thin characteristics.
  • the optical imaging lens group of the present application may satisfy the conditional expression 0.4 ⁇ T67 / T78 ⁇ 1.0, where T67 is the separation distance between the sixth lens and the seventh lens on the optical axis, and T78 is the seventh lens The distance from the eighth lens on the optical axis. More specifically, T67 and T78 can further satisfy 0.47 ⁇ T67 / T78 ⁇ 0.91.
  • the above-mentioned optical imaging lens group may further include at least one diaphragm to improve the imaging quality of the optical imaging lens group.
  • the diaphragm may be provided between the object side and the first lens.
  • the above-mentioned optical imaging lens group may further include a filter for correcting color deviation and / or a protective glass for protecting the photosensitive element on the imaging surface.
  • the optical imaging lens group according to the above embodiments of the present application may employ multiple lenses, such as the eight described above.
  • the volume of the optical imaging lens group can be effectively reduced, the sensitivity of the optical imaging lens group can be reduced, and the The processability of the optical imaging lens group makes the optical imaging lens group more conducive to production and processing and applicable to portable electronic products.
  • the optical imaging lens set with the above configuration can also have beneficial effects such as ultra-thin, large aperture, large angle of view, and high imaging quality.
  • At least one of the mirror surfaces of each lens is an aspheric mirror surface, that is, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens
  • At least one of the object side and the image side of each of the eighth lenses is aspherical.
  • the characteristics of aspheric lenses are: from the lens center to the lens periphery, the curvature is continuously changing. Unlike spherical lenses, which have a constant curvature from the center of the lens to the periphery of the lens, aspheric lenses have better curvature radius characteristics, and have the advantages of improving distortion aberrations and improving astigmatic aberrations.
  • the object side and the image side of each of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, and the eighth lens may be non- Sphere.
  • the number of lenses constituting the optical imaging lens group can be changed to obtain various results and advantages described in this specification without departing from the technical solution claimed in this application.
  • the optical imaging lens group is not limited to include eight lenses.
  • the optical imaging lens set may also include other numbers of lenses. Specific examples of the optical imaging lens set applicable to the above-mentioned embodiment will be further described below with reference to the drawings.
  • FIG. 1 shows a schematic structural diagram of an optical imaging lens group according to Example 1 of the present application.
  • the optical imaging lens group includes, in order from the object side to the image side along the optical axis: an aperture STO, a first lens E1, a second lens E2, a third lens E3, The fourth lens E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, the eighth lens E8, the filter E9, and the imaging plane S19.
  • the first lens E1 has negative refractive power, its object side S1 is convex, and its image side S2 is concave.
  • the second lens E2 has positive refractive power, and its object side S3 is convex, and its image side S4 is convex.
  • the third lens E3 has positive refractive power, and its object side surface S5 is a concave surface, and its image side surface S6 is a convex surface.
  • the fourth lens E4 has negative refractive power, and its object side surface S7 is concave and the image side surface S8 is concave.
  • the fifth lens E5 has positive refractive power, and its object side surface S9 is convex, and its image side surface S10 is convex.
  • the sixth lens E6 has negative refractive power, and its object side surface S11 is concave and its image side surface S12 is convex.
  • the seventh lens E7 has positive refractive power, and its object side surface S13 is convex, and its image side surface S14 is concave.
  • the eighth lens E8 has negative refractive power, and its object side surface S15 is concave and the image side surface S16 is concave.
  • the filter E9 has an object side S17 and an image side S18. The light from the object sequentially passes through the surfaces S1 to S18 and is finally imaged on the imaging plane S19.
  • Table 1 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical imaging lens group of Example 1, wherein the units of radius of curvature and thickness are both millimeters (mm).
  • each aspheric lens can be defined by, but not limited to, the following aspheric formula:
  • x is the distance from the apex of the aspheric surface to the height of the aspheric surface at the height h along the optical axis;
  • k is the conic coefficient (given in Table 1);
  • Ai is the correction coefficient of the i-th order of the aspheric surface.
  • Table 2 shows the high-order coefficients A 4 , A 6 , A 8 , A 10 , A 12 , A 14 , A 16 , A 18 and A 20 that can be used for each aspherical mirror surface S1-S16 in Example 1 .
  • Table 3 shows the effective focal lengths f1 to f8 of each lens of the optical imaging lens group in Example 1, the total effective focal length f of the optical imaging lens group, and the total optical length TTL (ie, from the object side S1 of the first lens E1 to The distance of the plane S19 on the optical axis), the effective pixel area on the imaging plane S19 is half the diagonal length of ImgH and the maximum half angle of view HFOV.
  • FIG. 2A shows the on-axis chromatic aberration curve of the optical imaging lens group of Example 1, which indicates that rays of different wavelengths will deviate from the focal point after passing through the optical imaging lens group.
  • 2B shows the astigmatism curve of the optical imaging lens set of Example 1, which represents meridional image plane curvature and sagittal image plane curvature.
  • 2C shows the distortion curve of the optical imaging lens set of Example 1, which represents the distortion magnitude values corresponding to different image heights.
  • 2D shows the magnification chromatic aberration curve of the optical imaging lens group of Example 1, which represents the deviation of different image heights on the imaging plane of light rays passing through the optical imaging lens group. It can be seen from FIGS. 2A to 2D that the optical imaging lens group provided in Example 1 can achieve good imaging quality.
  • FIG. 3 shows a schematic structural diagram of an optical imaging lens group according to Example 2 of the present application.
  • the optical imaging lens group includes, in order from the object side to the image side along the optical axis: an aperture STO, a first lens E1, a second lens E2, a third lens E3, The fourth lens E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, the eighth lens E8, the filter E9, and the imaging plane S19.
  • the first lens E1 has positive refractive power, and its object side surface S1 is convex, and its image side surface S2 is concave.
  • the second lens E2 has positive refractive power, and its object side S3 is convex, and its image side S4 is convex.
  • the third lens E3 has positive refractive power, and its object side surface S5 is a concave surface, and its image side surface S6 is a convex surface.
  • the fourth lens E4 has negative refractive power, and its object side surface S7 is concave and the image side surface S8 is concave.
  • the fifth lens E5 has positive refractive power, and its object side surface S9 is a concave surface, and its image side surface S10 is a convex surface.
  • the sixth lens E6 has positive refractive power, and its object side surface S11 is a concave surface, and its image side surface S12 is a convex surface.
  • the seventh lens E7 has positive refractive power, and its object side surface S13 is convex, and its image side surface S14 is concave.
  • the eighth lens E8 has negative refractive power, and its object side surface S15 is concave and the image side surface S16 is concave.
  • the filter E9 has an object side S17 and an image side S18. The light from the object sequentially passes through the surfaces S1 to S18 and is finally imaged on the imaging plane S19.
  • Table 4 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical imaging lens group of Example 2, wherein the units of radius of curvature and thickness are both millimeters (mm).
  • Table 5 shows the coefficients of higher order that can be used for each aspherical mirror surface in Example 2, where each aspherical surface type can be defined by the formula (1) given in Example 1 above.
  • Table 6 shows the effective focal length f1 to f8 of each lens of the optical imaging lens group in Example 2, the total effective focal length f of the optical imaging lens group, the total optical length TTL, and the half of the diagonal length of the effective pixel area on the imaging surface S19 ImgH and the maximum half angle of view HFOV.
  • FIG. 4A shows the on-axis chromatic aberration curve of the optical imaging lens group of Example 2, which indicates that rays of different wavelengths will deviate from the focal point after passing through the optical imaging lens group.
  • 4B shows the astigmatism curve of the optical imaging lens group of Example 2, which represents the meridional image plane curvature and sagittal image plane curvature.
  • 4C shows the distortion curve of the optical imaging lens set of Example 2, which represents the distortion magnitude values corresponding to different image heights.
  • 4D shows the magnification chromatic aberration curve of the optical imaging lens group of Example 2, which represents the deviation of different image heights on the imaging plane of light rays passing through the optical imaging lens group. It can be seen from FIGS. 4A to 4D that the optical imaging lens set provided in Example 2 can achieve good imaging quality.
  • FIG. 5 shows a schematic structural diagram of an optical imaging lens group according to Example 3 of the present application.
  • the optical imaging lens group includes, in order from the object side to the image side along the optical axis: an aperture STO, a first lens E1, a second lens E2, a third lens E3, The fourth lens E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, the eighth lens E8, the filter E9, and the imaging plane S19.
  • the first lens E1 has negative refractive power, its object side S1 is convex, and its image side S2 is concave.
  • the second lens E2 has positive refractive power, and its object side surface S3 is convex, and its image side surface S4 is concave.
  • the third lens E3 has positive refractive power, and its object side surface S5 is a concave surface, and its image side surface S6 is a convex surface.
  • the fourth lens E4 has negative refractive power, and its object side surface S7 is concave and the image side surface S8 is concave.
  • the fifth lens E5 has positive refractive power, and its object side surface S9 is a concave surface, and its image side surface S10 is a convex surface.
  • the sixth lens E6 has positive refractive power, and its object side surface S11 is a concave surface, and its image side surface S12 is a convex surface.
  • the seventh lens E7 has positive refractive power, and its object side surface S13 is convex, and its image side surface S14 is concave.
  • the eighth lens E8 has negative refractive power, and its object side surface S15 is concave and the image side surface S16 is concave.
  • the filter E9 has an object side S17 and an image side S18. The light from the object sequentially passes through the surfaces S1 to S18 and is finally imaged on the imaging plane S19.
  • Table 7 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical imaging lens group of Example 3, wherein the units of radius of curvature and thickness are both millimeters (mm).
  • Table 8 shows the coefficients of higher order that can be used for each aspherical mirror surface in Example 3, where each aspherical surface type can be defined by the formula (1) given in Example 1 above.
  • Table 9 shows the effective focal lengths f1 to f8 of each lens of the optical imaging lens group in Example 3, the total effective focal length f of the optical imaging lens group, the total optical length TTL, and the half of the diagonal length of the effective pixel area on the imaging surface S19 ImgH and the maximum half angle of view HFOV.
  • FIG. 6A shows the on-axis chromatic aberration curve of the optical imaging lens group of Example 3, which indicates that rays of different wavelengths will deviate from the focal point after passing through the optical imaging lens group.
  • 6B shows the astigmatism curve of the optical imaging lens set of Example 3, which represents meridional image plane curvature and sagittal image plane curvature.
  • 6C shows the distortion curve of the optical imaging lens set of Example 3, which represents the distortion magnitude values corresponding to different image heights.
  • 6D shows the magnification chromatic aberration curve of the optical imaging lens group of Example 3, which represents the deviation of different image heights on the imaging plane of light rays passing through the optical imaging lens group. It can be seen from FIGS. 6A to 6D that the optical imaging lens set provided in Example 3 can achieve good imaging quality.
  • FIGS. 7 to 8D shows a schematic structural diagram of an optical imaging lens group according to Example 4 of the present application.
  • the optical imaging lens group includes, in order from the object side to the image side along the optical axis: an aperture STO, a first lens E1, a second lens E2, a third lens E3
  • the fourth lens E4 the fifth lens E5, the sixth lens E6, the seventh lens E7, the eighth lens E8, the filter E9, and the imaging plane S19.
  • the first lens E1 has positive refractive power, and its object side surface S1 is convex, and its image side surface S2 is concave.
  • the second lens E2 has positive refractive power, and its object side surface S3 is convex, and its image side surface S4 is concave.
  • the third lens E3 has positive refractive power, and its object side surface S5 is convex, and its image side surface S6 is convex.
  • the fourth lens E4 has negative refractive power, and its object side surface S7 is concave and the image side surface S8 is concave.
  • the fifth lens E5 has positive refractive power, and its object side surface S9 is convex, and its image side surface S10 is convex.
  • the sixth lens E6 has negative refractive power, and its object side surface S11 is concave and its image side surface S12 is convex.
  • the seventh lens E7 has positive refractive power, and its object side surface S13 is convex, and its image side surface S14 is concave.
  • the eighth lens E8 has negative refractive power, and its object side surface S15 is concave and the image side surface S16 is concave.
  • the filter E9 has an object side S17 and an image side S18. The light from the object sequentially passes through the surfaces S1 to S18 and is finally imaged on the imaging plane S19.
  • Table 10 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical imaging lens group of Example 4, wherein the units of radius of curvature and thickness are both millimeters (mm).
  • Table 11 shows the coefficients of higher order that can be used for each aspherical mirror surface in Example 4, where each aspherical surface type can be defined by the formula (1) given in Example 1 above.
  • Table 12 shows the effective focal lengths f1 to f8 of each lens of the optical imaging lens group in Example 4, the total effective focal length f of the optical imaging lens group, the total optical length TTL, and the half of the diagonal length of the effective pixel area on the imaging surface S19 ImgH and the maximum half angle of view HFOV.
  • FIG. 8A shows the on-axis chromatic aberration curve of the optical imaging lens group of Example 4, which indicates that rays of different wavelengths will deviate from the focal point after passing through the optical imaging lens group.
  • 8B shows the astigmatism curve of the optical imaging lens group of Example 4, which represents meridional image plane curvature and sagittal image plane curvature.
  • 8C shows the distortion curve of the optical imaging lens group of Example 4, which represents the distortion magnitude values corresponding to different image heights.
  • 8D shows the magnification chromatic aberration curve of the optical imaging lens group of Example 4, which represents the deviation of different image heights on the imaging plane of light rays passing through the optical imaging lens group. It can be known from FIGS. 8A to 8D that the optical imaging lens group provided in Example 4 can achieve good imaging quality.
  • FIGS. 9 to 10D shows a schematic structural diagram of an optical imaging lens group according to Example 5 of the present application.
  • the optical imaging lens group includes, in order from the object side to the image side along the optical axis: an aperture STO, a first lens E1, a second lens E2, a third lens E3, The fourth lens E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, the eighth lens E8, the filter E9, and the imaging plane S19.
  • the first lens E1 has positive refractive power, and its object side surface S1 is convex, and its image side surface S2 is concave.
  • the second lens E2 has positive refractive power, and its object side surface S3 is convex, and its image side surface S4 is concave.
  • the third lens E3 has negative refractive power, and its object side surface S5 is a concave surface, and its image side surface S6 is a convex surface.
  • the fourth lens E4 has negative refractive power, and its object side surface S7 is convex, and its image side surface S8 is concave.
  • the fifth lens E5 has positive refractive power, and its object side surface S9 is convex, and its image side surface S10 is convex.
  • the sixth lens E6 has negative refractive power, and its object side surface S11 is concave and its image side surface S12 is convex.
  • the seventh lens E7 has positive refractive power, and its object side surface S13 is convex, and its image side surface S14 is concave.
  • the eighth lens E8 has negative refractive power, and its object side surface S15 is concave and the image side surface S16 is concave.
  • the filter E9 has an object side S17 and an image side S18. The light from the object sequentially passes through the surfaces S1 to S18 and is finally imaged on the imaging plane S19.
  • Table 13 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical imaging lens group of Example 5, wherein the units of radius of curvature and thickness are both millimeters (mm).
  • Table 14 shows the coefficients of higher order that can be used for each aspherical mirror surface in Example 5, where each aspherical surface type can be defined by the formula (1) given in Example 1 above.
  • Table 15 shows the effective focal lengths f1 to f8 of each lens of the optical imaging lens group in Example 5, the total effective focal length f of the optical imaging lens group, the total optical length TTL, and the half of the diagonal length of the effective pixel area on the imaging surface S19 ImgH and the maximum half angle of view HFOV.
  • FIG. 10A shows the on-axis chromatic aberration curve of the optical imaging lens group of Example 5, which indicates that rays of different wavelengths will deviate from the focus point after passing through the optical imaging lens group.
  • 10B shows the astigmatism curve of the optical imaging lens group of Example 5, which represents meridional image plane curvature and sagittal image plane curvature.
  • 10C shows the distortion curve of the optical imaging lens group of Example 5, which represents the distortion magnitude values corresponding to different image heights.
  • 10D shows the magnification chromatic aberration curve of the optical imaging lens group of Example 5, which represents the deviation of different image heights on the imaging plane of light rays passing through the optical imaging lens group. It can be known from FIGS. 10A to 10D that the optical imaging lens group provided in Example 5 can achieve good imaging quality.
  • FIG. 11 shows a schematic structural diagram of an optical imaging lens group according to Example 6 of the present application.
  • the optical imaging lens group includes, in order from the object side to the image side along the optical axis: an aperture STO, a first lens E1, a second lens E2, a third lens E3
  • the fourth lens E4 the fifth lens E5, the sixth lens E6, the seventh lens E7, the eighth lens E8, the filter E9, and the imaging plane S19.
  • the first lens E1 has positive refractive power, and its object side surface S1 is convex, and its image side surface S2 is concave.
  • the second lens E2 has positive refractive power, and its object side surface S3 is convex, and its image side surface S4 is concave.
  • the third lens E3 has negative refractive power, and its object side surface S5 is a concave surface, and its image side surface S6 is a convex surface.
  • the fourth lens E4 has negative refractive power, and its object side surface S7 is concave and the image side surface S8 is concave.
  • the fifth lens E5 has positive refractive power, and its object side surface S9 is convex, and its image side surface S10 is convex.
  • the sixth lens E6 has positive refractive power, and its object side surface S11 is a concave surface, and its image side surface S12 is a convex surface.
  • the seventh lens E7 has positive refractive power, and its object side surface S13 is convex, and its image side surface S14 is concave.
  • the eighth lens E8 has negative refractive power, and its object side surface S15 is concave and the image side surface S16 is concave.
  • the filter E9 has an object side S17 and an image side S18. The light from the object sequentially passes through the surfaces S1 to S18 and is finally imaged on the imaging plane S19.
  • Table 16 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical imaging lens group of Example 6, wherein the units of radius of curvature and thickness are both millimeters (mm).
  • Table 17 shows the coefficients of higher order that can be used for each aspherical mirror surface in Example 6, where each aspherical surface type can be defined by the formula (1) given in Example 1 above.
  • Table 18 shows the effective focal length f1 to f8 of each lens of the optical imaging lens group in Example 6, the total effective focal length f of the optical imaging lens group, the total optical length TTL, and the half of the diagonal length of the effective pixel area on the imaging surface S19 ImgH and the maximum half angle of view HFOV.
  • FIG. 12A shows the on-axis chromatic aberration curve of the optical imaging lens group of Example 6, which indicates that rays of different wavelengths will deviate from the focal point after passing through the optical imaging lens group.
  • 12B shows the astigmatism curve of the optical imaging lens group of Example 6, which represents meridional image plane curvature and sagittal image plane curvature.
  • 12C shows the distortion curve of the optical imaging lens set of Example 6, which represents the distortion magnitude values corresponding to different image heights.
  • 12D shows the magnification chromatic aberration curve of the optical imaging lens group of Example 6, which represents the deviation of different image heights on the imaging plane of light rays passing through the optical imaging lens group. It can be seen from FIGS. 12A to 12D that the optical imaging lens group provided in Example 6 can achieve good imaging quality.
  • FIGS. Fig. 13 shows a schematic structural diagram of an optical imaging lens group according to Example 7 of the present application.
  • the optical imaging lens group includes, in order from the object side to the image side along the optical axis: an aperture STO, a first lens E1, a second lens E2, a third lens E3
  • the fourth lens E4 the fifth lens E5, the sixth lens E6, the seventh lens E7, the eighth lens E8, the filter E9, and the imaging plane S19.
  • the first lens E1 has negative refractive power, its object side S1 is convex, and its image side S2 is concave.
  • the second lens E2 has positive refractive power, and its object side surface S3 is convex, and its image side surface S4 is concave.
  • the third lens E3 has negative refractive power, and its object side surface S5 is a concave surface, and its image side surface S6 is a convex surface.
  • the fourth lens E4 has negative refractive power, and its object side surface S7 is concave and the image side surface S8 is concave.
  • the fifth lens E5 has positive refractive power, and its object side surface S9 is convex, and its image side surface S10 is convex.
  • the sixth lens E6 has positive refractive power, and its object side surface S11 is a concave surface, and its image side surface S12 is a convex surface.
  • the seventh lens E7 has positive refractive power, and its object side surface S13 is convex and the image side surface S14 is convex.
  • the eighth lens E8 has negative refractive power, and its object side surface S15 is concave and the image side surface S16 is concave.
  • the filter E9 has an object side S17 and an image side S18. The light from the object sequentially passes through the surfaces S1 to S18 and is finally imaged on the imaging plane S19.
  • Table 19 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical imaging lens group of Example 7, wherein the units of radius of curvature and thickness are both millimeters (mm).
  • Table 20 shows the coefficients of higher order that can be used for each aspherical mirror surface in Example 7, where each aspherical surface type can be defined by the formula (1) given in Example 1 above.
  • Table 21 shows the effective focal length f1 to f8 of each lens of the optical imaging lens group in Example 7, the total effective focal length f of the optical imaging lens group, the total optical length TTL, and the half of the diagonal length of the effective pixel area on the imaging surface S19 ImgH and maximum half angle of view.
  • FIG. 14A shows the on-axis chromatic aberration curve of the optical imaging lens group of Example 7, which indicates that rays of different wavelengths will deviate from the focal point after passing through the optical imaging lens group.
  • 14B shows the astigmatism curve of the optical imaging lens group of Example 7, which represents meridional image plane curvature and sagittal image plane curvature.
  • 14C shows the distortion curve of the optical imaging lens group of Example 7, which represents the distortion magnitude values corresponding to different image heights.
  • 14D shows the magnification chromatic aberration curve of the optical imaging lens group of Example 7, which represents the deviation of different image heights on the imaging plane of light rays passing through the optical imaging lens group. It can be seen from FIGS. 14A to 14D that the optical imaging lens group provided in Example 7 can achieve good imaging quality.
  • FIGS. 15 to 16D shows a schematic structural diagram of an optical imaging lens group according to Example 8 of the present application.
  • the optical imaging lens group includes, in order from the object side to the image side along the optical axis: an aperture STO, a first lens E1, a second lens E2, a third lens E3, The fourth lens E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, the eighth lens E8, the filter E9, and the imaging plane S19.
  • the first lens E1 has positive refractive power, and its object side surface S1 is convex, and its image side surface S2 is concave.
  • the second lens E2 has positive refractive power, and its object side surface S3 is convex, and its image side surface S4 is concave.
  • the third lens E3 has positive refractive power, and its object side surface S5 is convex, and its image side surface S6 is convex.
  • the fourth lens E4 has negative refractive power, and its object side surface S7 is convex, and its image side surface S8 is concave.
  • the fifth lens E5 has negative refractive power, and its object side surface S9 is convex, and its image side surface S10 is concave.
  • the sixth lens E6 has positive refractive power, and its object side surface S11 is concave and its image side surface S12 is convex.
  • the seventh lens E7 has positive refractive power, and its object side surface S13 is convex, and its image side surface S14 is concave.
  • the eighth lens E8 has negative refractive power, and its object side surface S15 is concave and the image side surface S16 is concave.
  • the filter E9 has an object side S17 and an image side S18. The light from the object sequentially passes through the surfaces S1 to S18 and is finally imaged on the imaging plane S19.
  • Table 22 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical imaging lens group of Example 8, wherein the units of radius of curvature and thickness are both millimeters (mm).
  • Table 23 shows the coefficients of higher order that can be used for each aspherical mirror surface in Example 8, where each aspherical surface type can be defined by the formula (1) given in Example 1 above.
  • Table 24 shows the effective focal lengths f1 to f8 of each lens of the optical imaging lens group in Example 8, the total effective focal length f of the optical imaging lens group, the total optical length TTL, and the half of the diagonal length of the effective pixel area on the imaging surface S19 ImgH and the maximum half angle of view HFOV.
  • FIG. 16A shows an on-axis chromatic aberration curve of the optical imaging lens group of Example 8, which indicates that rays of different wavelengths will deviate from the focal point after passing through the optical imaging lens group.
  • 16B shows the astigmatism curve of the optical imaging lens group of Example 8, which represents meridional image plane curvature and sagittal image plane curvature.
  • FIG. 16C shows the distortion curve of the optical imaging lens group of Example 8, which represents the distortion magnitude values corresponding to different image heights.
  • 16D shows the magnification chromatic aberration curve of the optical imaging lens group of Example 8, which represents the deviation of different image heights on the imaging plane of light rays passing through the optical imaging lens group. It can be known from FIGS. 16A to 16D that the optical imaging lens group provided in Example 8 can achieve good imaging quality.
  • FIGS. 17 to 18D show a schematic structural diagram of an optical imaging lens group according to Example 9 of the present application.
  • the optical imaging lens group includes, in order from the object side to the image side along the optical axis: an aperture STO, a first lens E1, a second lens E2, a third lens E3
  • the fourth lens E4 the fifth lens E5, the sixth lens E6, the seventh lens E7, the eighth lens E8, the filter E9, and the imaging plane S19.
  • the first lens E1 has negative refractive power, its object side S1 is convex, and its image side S2 is concave.
  • the second lens E2 has positive refractive power, and its object side surface S3 is convex, and its image side surface S4 is concave.
  • the third lens E3 has negative refractive power, and its object side surface S5 is a concave surface, and its image side surface S6 is a convex surface.
  • the fourth lens E4 has negative refractive power, and its object side surface S7 is concave and the image side surface S8 is concave.
  • the fifth lens E5 has negative refractive power, and its object side surface S9 is convex, and its image side surface S10 is concave.
  • the sixth lens E6 has positive refractive power, and its object side surface S11 is a concave surface, and its image side surface S12 is a convex surface.
  • the seventh lens E7 has positive refractive power, and its object side surface S13 is convex, and its image side surface S14 is concave.
  • the eighth lens E8 has negative refractive power, and its object side surface S15 is concave and the image side surface S16 is concave.
  • the filter E9 has an object side S17 and an image side S18. The light from the object sequentially passes through the surfaces S1 to S18 and is finally imaged on the imaging plane S19.
  • Table 25 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical imaging lens group of Example 9, wherein the units of radius of curvature and thickness are both millimeters (mm).
  • Table 26 shows the coefficients of higher order that can be used for each aspherical mirror surface in Example 9, where each aspherical surface type can be defined by the formula (1) given in Example 1 above.
  • Table 27 shows the effective focal length f1 to f8 of each lens of the optical imaging lens group in Example 9, the total effective focal length f of the optical imaging lens group, the total optical length TTL, and the half of the diagonal length of the effective pixel area on the imaging surface S19 ImgH and the maximum half angle of view HFOV.
  • FIG. 18A shows the on-axis chromatic aberration curve of the optical imaging lens group of Example 9, which indicates that rays of different wavelengths will deviate from the focal point after passing through the optical imaging lens group.
  • 18B shows the astigmatism curve of the optical imaging lens set of Example 9, which represents meridional image plane curvature and sagittal image plane curvature.
  • 18C shows the distortion curve of the optical imaging lens group of Example 9, which represents the distortion magnitude values corresponding to different image heights.
  • 18D shows the magnification chromatic aberration curve of the optical imaging lens group of Example 9, which represents the deviation of different image heights on the imaging plane of light rays passing through the optical imaging lens group. It can be seen from FIGS. 18A to 18D that the optical imaging lens group provided in Example 9 can achieve good imaging quality.
  • FIG. 19 shows a schematic structural diagram of an optical imaging lens group according to Example 10 of the present application.
  • the optical imaging lens group includes, in order from the object side to the image side along the optical axis: an aperture STO, a first lens E1, a second lens E2, a third lens E3
  • the fourth lens E4 the fifth lens E5, the sixth lens E6, the seventh lens E7, the eighth lens E8, the filter E9, and the imaging plane S19.
  • the first lens E1 has negative refractive power, its object side S1 is convex, and its image side S2 is concave.
  • the second lens E2 has positive refractive power, and its object side surface S3 is convex, and its image side surface S4 is concave.
  • the third lens E3 has positive refractive power, and its object side surface S5 is convex, and its image side surface S6 is convex.
  • the fourth lens E4 has negative refractive power, and its object side surface S7 is concave and the image side surface S8 is concave.
  • the fifth lens E5 has negative refractive power, and its object side surface S9 is convex, and its image side surface S10 is concave.
  • the sixth lens E6 has positive refractive power, and its object side surface S11 is a concave surface, and its image side surface S12 is a convex surface.
  • the seventh lens E7 has positive refractive power, and its object side surface S13 is convex, and its image side surface S14 is concave.
  • the eighth lens E8 has negative refractive power, and its object side surface S15 is concave and the image side surface S16 is concave.
  • the filter E9 has an object side S17 and an image side S18. The light from the object sequentially passes through the surfaces S1 to S18 and is finally imaged on the imaging plane S19.
  • Table 28 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical imaging lens group of Example 10, in which the units of radius of curvature and thickness are both millimeters (mm).
  • Table 29 shows the coefficients of higher order that can be used for each aspherical mirror surface in Example 10, where each aspherical surface type can be defined by the formula (1) given in Example 1 above.
  • Table 30 shows the effective focal length f1 to f8 of each lens of the optical imaging lens group in Example 10, the total effective focal length f of the optical imaging lens group, the total optical length TTL, and the half of the diagonal length of the effective pixel area on the imaging surface S19 ImgH and the maximum half angle of view HFOV.
  • FIG. 20A shows the on-axis chromatic aberration curve of the optical imaging lens group of Example 10, which indicates that rays of different wavelengths will deviate from the focal point after passing through the optical imaging lens group.
  • 20B shows the astigmatism curve of the optical imaging lens group of Example 10, which represents meridional image plane curvature and sagittal image plane curvature.
  • FIG. 20C shows the distortion curve of the optical imaging lens group of Example 10, which represents the distortion magnitude values corresponding to different image heights.
  • FIG. 20D shows the magnification chromatic aberration curve of the optical imaging lens group of Example 10, which represents the deviation of different image heights on the imaging plane of light rays passing through the optical imaging lens group. It can be seen from FIGS. 20A to 20D that the optical imaging lens group provided in Example 10 can achieve good imaging quality.
  • Examples 1 to 10 satisfy the relationships shown in Table 31, respectively.
  • the present application also provides an imaging device whose electronic photosensitive element may be a photosensitive coupling element (CCD) or a complementary metal oxide semiconductor element (CMOS).
  • the imaging device may be an independent imaging device such as a digital camera, or an imaging module integrated on a mobile electronic device such as a mobile phone.
  • the imaging device is equipped with the optical imaging lens group described above.

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Abstract

La présente invention concerne une lentille d'imagerie optique qui comprend, dans l'ordre, du côté objet au côté image le long de l'axe optique : une première lentille (E1), une deuxième lentille (E2), une troisième lentille (E3), une quatrième lentille (E4), une cinquième lentille (E5), une sixième lentille (E6), une septième lentille (E7) et une huitième lentille (E8). La première lentille (E1) a une puissance focale positive ; la deuxième lentille (E2) a une puissance focale négative ; la troisième lentille (E3) a une puissance focale, et une surface côté image (S6) de celle-ci est une surface convexe ; la quatrième lentille (E4) a une puissance focale négative ; la cinquième lentille (E5) a une puissance focale ; la sixième lentille (E6) a une puissance focale, la surface côté objet (S11) de celle-ci est une surface convexe ; la septième lentille (E7) a une puissance focale positive ; et la huitième lentille (E8) a une puissance focale.
PCT/CN2019/095359 2018-10-08 2019-07-10 Ensemble de lentilles d'imagerie optique WO2020073702A1 (fr)

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CN208833988U (zh) * 2018-10-08 2019-05-07 浙江舜宇光学有限公司 光学成像镜片组

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