WO2020010878A1 - 光学成像系统 - Google Patents

光学成像系统 Download PDF

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Publication number
WO2020010878A1
WO2020010878A1 PCT/CN2019/081361 CN2019081361W WO2020010878A1 WO 2020010878 A1 WO2020010878 A1 WO 2020010878A1 CN 2019081361 W CN2019081361 W CN 2019081361W WO 2020010878 A1 WO2020010878 A1 WO 2020010878A1
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Prior art keywords
lens
imaging system
optical imaging
object side
image side
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PCT/CN2019/081361
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English (en)
French (fr)
Inventor
游兴海
张凯元
黄林
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浙江舜宇光学有限公司
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Priority to US17/257,304 priority Critical patent/US20210231925A1/en
Publication of WO2020010878A1 publication Critical patent/WO2020010878A1/zh

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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
    • 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
    • G02B13/06—Panoramic objectives; So-called "sky lenses" including panoramic objectives having reflecting surfaces
    • 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
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/0025—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for optical correction, e.g. distorsion, aberration
    • 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 present application relates to an optical imaging system, and more particularly, the present application relates to an optical imaging system including seven lenses.
  • the aperture number (F-number) of existing lenses is usually configured to be 2.0 or more, so as to balance miniaturization and good optical performance.
  • the F number is 2.0 Or lenses of 2.0 or higher can no longer meet higher-level imaging requirements.
  • the present application provides an optical imaging system, such as a large-aperture imaging lens, which is applicable to portable electronic products and can at least partially solve at least one of the above disadvantages in the prior art.
  • the imaging system includes, 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, a fifth lens, Sixth lens and seventh lens.
  • the first lens may have positive power
  • the second lens may have negative power
  • the object side may be concave
  • the image side may be convex
  • the third lens has power
  • the fourth lens may have positive power
  • the object side may be concave and the image side may be convex
  • the fifth lens has power
  • the sixth lens has power
  • the seventh lens may have negative power and the object side may be convex.
  • the total effective focal length f of the optical imaging system and the entrance pupil diameter EPD of the optical imaging system may satisfy f / EPD ⁇ 1.8.
  • the total effective focal length f of the optical imaging system and the effective focal length f1 of the first lens may satisfy 1 ⁇ f / f1 ⁇ 1.5.
  • the total effective focal length f of the optical imaging system and the effective focal length f7 of the seventh lens may satisfy ⁇ 1 ⁇ f / f7 ⁇ 0.
  • the curvature radius R2 of the image side of the first lens and the curvature radius R1 of the object side of the first lens may satisfy 1 ⁇ R2 / (R1 * 2) ⁇ 2.5.
  • the curvature radius R13 of the object side of the seventh lens, the curvature radius R14 of the image side of the seventh lens, the curvature radius R11 of the object side of the sixth lens, and the curvature radius R12 of the image side of the sixth lens may be Satisfy 0.3 ⁇ (R13 + R14) / (R11 + R12) ⁇ 1.
  • the center thickness CT4 can satisfy 0.7 ⁇ CT1 / (CT2 + CT3 + CT4) ⁇ 1.1.
  • the separation distance T23 on the optical axis of the second lens and the third lens and the center thickness CT3 of the third lens on the optical axis may satisfy 0.1 ⁇ T23 / CT3 ⁇ 0.8.
  • the combined focal length f34 of the third lens and the fourth lens and the combined focal length f56 of the fifth lens and the sixth lens may satisfy -5 ⁇ f34 / f56 ⁇ 1.
  • the sum of the center thicknesses of the first lens to the seventh lens on the optical axis, ⁇ CT, and the distance TTL on the optical axis from the object side of the first lens to the imaging surface of the optical imaging system may satisfy 0.5 ⁇ ⁇ CT / TTL ⁇ 0.7.
  • the total effective focal length f of the optical imaging system and the maximum half field angle HFOV of the optical imaging system may satisfy 3.9 mm ⁇ f * TAN (HFOV) ⁇ 4.5 mm.
  • This application uses multiple (for example, seven) lenses, and by reasonably distributing the power, surface shape, center thickness of each lens, and the axial distance between each lens, etc., the above optical imaging system has super At least one beneficial effect such as thinness, miniaturization, large aperture, and high imaging quality.
  • FIG. 1 shows a schematic structural diagram of an optical imaging system according to Embodiment 1 of the present application
  • FIGS. 2A to 2D respectively show on-axis chromatic aberration curves, astigmatism curves, distortion curves, and magnification chromatic aberrations of the optical imaging system of Embodiment 1; curve;
  • FIG. 3 shows a schematic structural diagram of an optical imaging system according to Embodiment 2 of the present application
  • FIGS. 4A to 4D show on-axis chromatic aberration curves, astigmatism curves, distortion curves, and magnification chromatic aberrations of the optical imaging system of Embodiment 2 respectively. curve;
  • FIG. 5 shows a schematic structural diagram of an optical imaging system according to Embodiment 3 of the present application
  • FIGS. 6A to 6D show the on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration of the optical imaging system of Embodiment 3, respectively. curve;
  • FIG. 7 shows a schematic structural diagram of an optical imaging system according to Embodiment 4 of the present application
  • FIGS. 8A to 8D show on-axis chromatic aberration curves, astigmatism curves, distortion curves, and magnification chromatic aberrations of the optical imaging system of Embodiment 4 respectively. curve;
  • FIG. 9 shows a schematic structural diagram of an optical imaging system according to Embodiment 5 of the present application
  • FIGS. 10A to 10D show on-axis chromatic aberration curves, astigmatism curves, distortion curves, and magnification chromatic aberrations of the optical imaging system of Embodiment 5 respectively. curve;
  • FIG. 11 shows a schematic structural diagram of an optical imaging system according to Embodiment 6 of the present application
  • FIGS. 12A to 12D show on-axis chromatic aberration curves, astigmatism curves, distortion curves, and magnification chromatic aberrations of the optical imaging system of Embodiment 6 respectively. curve;
  • FIG. 13 shows a schematic structural diagram of an optical imaging system according to Embodiment 7 of the present application
  • FIGS. 14A to 14D show on-axis chromatic aberration curves, astigmatism curves, distortion curves, and magnification chromatic aberrations of the optical imaging system of Embodiment 7 respectively. curve;
  • FIG. 15 shows a schematic structural diagram of an optical imaging system according to Embodiment 8 of the present application
  • FIGS. 16A to 16D show on-axis chromatic aberration curves, astigmatic curves, distortion curves, and magnification chromatic aberrations of the optical imaging system of Embodiment 8 respectively. curve;
  • FIG. 17 shows a schematic structural diagram of an optical imaging system according to Embodiment 9 of the present application
  • FIGS. 18A to 18D show on-axis chromatic aberration curves, astigmatism curves, distortion curves, and magnification chromatic aberrations of the optical imaging system of Embodiment 9 respectively. curve;
  • FIG. 19 shows a schematic structural diagram of an optical imaging system according to Embodiment 10 of the present application
  • FIGS. 20A to 20D show on-axis chromatic aberration curves, astigmatism curves, distortion curves, and magnification chromatic aberrations of the optical imaging system of Embodiment 10, respectively. curve.
  • first, second, third, etc. are only used to distinguish one feature from another feature, and do not indicate any limitation on the feature. Therefore, without departing from the teachings of this application, a 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.
  • the shape of the spherical or aspherical surface shown in the drawings is shown by way of example. That is, the shape of the spherical or aspherical surface is not limited to the shape of the spherical or aspherical surface shown in the drawings.
  • the drawings are only examples and are not drawn to scale.
  • the paraxial region refers to a 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 area; 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 area. Concave. The surface closest to the object side in each lens is called the object side of the lens; the surface closest to the image side in each lens is called the image side of the lens.
  • An optical imaging system may include, for example, seven lenses having optical power, that is, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a first lens. Seven lenses. These seven lenses are arranged in order from the object side to the image side along the optical axis, and any two adjacent lenses can have an air gap.
  • the first lens may have a positive power; the second lens may have a negative power; the object side may be concave, and the image side may be convex; the third lens may have a positive power or a negative power.
  • the fourth lens may have positive power, the object side may be concave, and the image side may be convex; the fifth lens has positive or negative power; the sixth lens has positive or negative power; And the seventh lens may have a negative power, and an object side thereof may be a convex surface.
  • the object side surface of the first lens may be a convex surface
  • the image side surface may be a concave surface
  • the object side of the sixth lens may be convex, and the image side may be concave.
  • the image side of the seventh lens may be concave.
  • the optical imaging system of the present application may satisfy a conditional expression f / EPD ⁇ 1.8, where f is a total effective focal length of the optical imaging system and EPD is an entrance pupil diameter of the optical imaging system. More specifically, f and EPD can further satisfy 1.60 ⁇ f / EPD ⁇ 1.77.
  • f and EPD can further satisfy 1.60 ⁇ f / EPD ⁇ 1.77.
  • the optical imaging system of the present application can satisfy a conditional expression of 3.9 mm ⁇ f * TAN (HFOV) ⁇ 4.5 mm, where f is a total effective focal length of the optical imaging system, and HFOV is a maximum half of the optical imaging system. Field of View. More specifically, f and HFOV can further satisfy 3.90 mm ⁇ f * TAN (HFOV) ⁇ 4.10 mm, for example, 3.90 mm ⁇ f * TAN (HFOV) ⁇ 3.95 mm.
  • the image height of the optical system is controlled within a certain reasonable range, so that it can be matched with a large image surface chip, so that the system also has high pixels , Low sensitivity, easy processing and so on.
  • the optical imaging system of the present application can satisfy the conditional expression 1 ⁇ f / f1 ⁇ 1.5, where f is a total effective focal length of the optical imaging system and f1 is an effective focal length of the first lens. More specifically, f and f1 can further satisfy 1.02 ⁇ f / f1 ⁇ 1.22.
  • the first lens can not only bear the positive power required by the system, but also control the spherical aberration contributed by the first lens within a certain range, thereby ensuring follow-up
  • the optical lens can reasonably correct the negative spherical aberration contributed by the first lens, so that the system has better image quality in the field of view area on the axis.
  • the optical imaging system of the present application can satisfy a conditional expression ⁇ 1 ⁇ f / f7 ⁇ 0, where f is a total effective focal length of the optical imaging system and f7 is an effective focal length of the seventh lens. More specifically, f and f7 can further satisfy -0.76 ⁇ f / f7 ⁇ -0.25.
  • the power of the seventh lens to a reasonable range, the third-order positive spherical aberration and fifth-order negative spherical aberration contributed by it are within a reasonable range, so that the remaining spherical aberration generated by the front lens can be balanced, so that the system The image quality in the field of view area on the axis reaches a better level.
  • the optical imaging system of the present application can satisfy the conditional expression 1 ⁇ R2 / (R1 * 2) ⁇ 2.5, where R2 is the radius of curvature of the image side of the first lens and R1 is the radius of curvature of the object side of the first lens.
  • the radius of curvature. More specifically, R2 and R1 can further satisfy 1.49 ⁇ R2 / (R1 * 2) ⁇ 2.48.
  • the optical imaging system of the present application can satisfy the conditional expression 0.3 ⁇ (R13 + R14) / (R11 + R12) ⁇ 1, where R13 is the curvature radius of the object side of the seventh lens, and R14 is the first The curvature radius of the image side of the seventh lens, R11 is the curvature radius of the object side of the sixth lens, and R12 is the curvature radius of the image side of the sixth lens. More specifically, R13, R14, R11, and R12 can further satisfy 0.38 ⁇ (R13 + R14) / (R11 + R12) ⁇ 0.73.
  • the incident angle of the main ray in each field of view on the image plane can be controlled reasonably, which is conducive to meeting the requirements of the main ray incident angle in the design of the optical system.
  • the optical imaging system of the present application can satisfy the conditional expression 0.7 ⁇ CT1 / (CT2 + CT3 + CT4) ⁇ 1.1, where CT1 is the center thickness of the first lens on the optical axis and CT2 is the second The central thickness of the lens on the optical axis, CT3 is the central thickness of the third lens on the optical axis, and CT4 is the central thickness of the fourth lens on the optical axis. More specifically, CT1, CT2, CT3, and CT4 can further satisfy 0.73 ⁇ CT1 / (CT2 + CT3 + CT4) ⁇ 1.03.
  • the optical imaging system of the present application can satisfy the conditional expression 0.1 ⁇ T23 / CT3 ⁇ 0.8, where T23 is the distance between the second lens and the third lens on the optical axis, and CT3 is the distance between the third lens and the third lens. Center thickness on the optical axis. More specifically, T23 and CT3 can further satisfy 0.11 ⁇ T23 / CT3 ⁇ 0.59. By properly restricting the ratio of the separation distance between the second lens and the third lens to the center thickness of the third lens, the field curvature and distortion of the system can be effectively guaranteed, and the off-axis field of view has good imaging quality.
  • the optical imaging system of the present application may satisfy a conditional expression -5 ⁇ f34 / f56 ⁇ 1, where f34 is a combined focal length of the third lens and the fourth lens, and f56 is a fifth lens and a sixth lens. Combined focal length. More specifically, f34 and f56 can further satisfy ⁇ 4.82 ⁇ f34 / f56 ⁇ 0.91.
  • the contribution amounts of the aberrations of these four lenses can be reasonably controlled, so that the contribution amounts of the aberrations of these four lenses can be compared with The aberrations generated by the front-end optical lens are balanced, so that the system aberrations are at a reasonable level, so that the optical imaging system has good imaging quality.
  • the optical imaging system of the present application can satisfy the conditional expression 0.5 ⁇ ⁇ CT / TTL ⁇ 0.7, where ⁇ CT is the sum of the center thicknesses of the first lens to the seventh lens on the optical axis, TTL The distance from the object side of the first lens to the imaging surface of the optical imaging system on the optical axis. More specifically, ⁇ CT and TTL can further satisfy 0.54 ⁇ ⁇ CT / TTL ⁇ 0.62.
  • the optical imaging system may further include a diaphragm to improve the imaging quality of the imaging system.
  • the stop can be set at any position between the object side and the image side as needed, for example, the stop can be set between the object side and the first lens.
  • the above-mentioned optical imaging system may further include a filter for correcting color deviation and / or a protective glass for protecting a photosensitive element on the imaging surface.
  • the optical imaging system according to the above embodiment of the present application may employ multiple lenses, such as the seven lenses described above.
  • the size of the system can be effectively reduced, the sensitivity of the system can be reduced, and the processability of the system can be improved.
  • the optical imaging system configured as described above can also have beneficial effects such as ultra-thinness, miniaturization, large aperture, high imaging quality, and the like.
  • At least one of the mirror surfaces of each lens is an aspherical mirror surface.
  • Aspheric lenses are characterized by a curvature that varies continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens with a constant curvature from the lens center to the periphery of the lens, an aspheric lens has better curvature radius characteristics, and has the advantages of improving distortion and astigmatic aberration. The use of aspheric lenses can eliminate as much aberrations as possible during imaging, thereby improving imaging quality.
  • the number of lenses constituting the optical imaging system can be changed to obtain various results and advantages described in this specification.
  • the optical imaging system is not limited to including seven lenses. If desired, the optical imaging system may include other numbers of lenses. Specific examples of the optical imaging system applicable to the above embodiments will be further described below with reference to the drawings.
  • FIG. 1 is a schematic structural diagram of an optical imaging system according to Embodiment 1 of the present application.
  • an optical imaging system includes: an aperture STO, a first lens E1, a second lens E2, a third lens E3, The four lenses E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, the filter E8, and the imaging surface S17.
  • the first lens E1 has a positive power, and the object side surface S1 is a convex surface, and the image side surface S2 is a concave surface.
  • the second lens E2 has a negative power, and the object side surface S3 is a concave surface, and the image side surface S4 is a convex surface.
  • the third lens E3 has a negative power, and the object side surface S5 is a convex surface, and the image side surface S6 is a concave surface.
  • the fourth lens E4 has a positive power, and the object side surface S7 is a concave surface, and the image side surface S8 is a convex surface.
  • the fifth lens E5 has a positive power
  • the object side surface S9 is a concave surface
  • the image side surface S10 is a convex surface.
  • the sixth lens E6 has a negative power
  • the object side surface S11 is a convex surface
  • the image side surface S12 is a concave surface.
  • the seventh lens E7 has a negative power
  • its object side surface S13 is a convex surface
  • its image side surface S14 is a concave surface.
  • the filter E8 has an object side surface S15 and an image side surface S16. The light from the object sequentially passes through the surfaces S1 to S16 and is finally imaged on the imaging surface S17.
  • Table 1 shows the surface type, the radius of curvature, the thickness, the material, and the conic coefficient of each lens of the optical imaging system of Example 1.
  • the units of the radius of curvature and thickness are millimeters (mm).
  • each aspheric lens can be defined using, but not limited to, the following aspheric formula:
  • x is the distance vector from the vertex of the aspheric surface when the aspheric surface is at the height h along the optical axis;
  • k is the conic coefficient (given in Table 1);
  • Ai is the correction coefficient of the aspherical i-th order.
  • Table 2 below shows the higher-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-S14 in Example 1. .
  • Table 3 shows the effective focal lengths f1 to f7 of each lens in Example 1, the total effective focal length f of the optical imaging system, the distance TTL on the optical axis from the object side S1 to the imaging surface S17 of the first lens E1, and The diagonal of the effective pixel area is half ImgH and the maximum half field angle HFOV of the optical imaging system.
  • FIG. 2A shows an on-axis chromatic aberration curve of the optical imaging system of Embodiment 1, which indicates that the focal points of light with different wavelengths deviate after passing through the system.
  • FIG. 2B shows an astigmatism curve of the optical imaging system of Example 1, which represents a meridional image plane curvature and a sagittal image plane curvature.
  • FIG. 2C shows a distortion curve of the optical imaging system of Example 1, which represents the magnitude of distortion corresponding to different image heights.
  • FIG. 2D shows the magnification chromatic aberration curve of the optical imaging system of Example 1, which represents the deviation of different image heights on the imaging plane after the light passes through the system. It can be known from FIG. 2A to FIG. 2D that the optical imaging system provided in Embodiment 1 can achieve good imaging quality.
  • FIG. 3 is a schematic structural diagram of an optical imaging system according to Embodiment 2 of the present application.
  • the optical imaging system 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, and a first lens.
  • the first lens E1 has a positive power, and the object side surface S1 is a convex surface, and the image side surface S2 is a concave surface.
  • the second lens E2 has a negative power, and the object side surface S3 is a concave surface, and the image side surface S4 is a convex surface.
  • the third lens E3 has a positive power, and the object side surface S5 is a convex surface, and the image side surface S6 is a concave surface.
  • the fourth lens E4 has a positive power, and the object side surface S7 is a concave surface, and the image side surface S8 is a convex surface.
  • the fifth lens E5 has a negative power
  • the object side surface S9 is a concave surface
  • the image side surface S10 is a convex surface.
  • the sixth lens E6 has a negative power
  • the object side surface S11 is a convex surface
  • the image side surface S12 is a concave surface.
  • the seventh lens E7 has a negative power
  • its object side surface S13 is a convex surface
  • its image side surface S14 is a concave surface.
  • the filter E8 has an object side surface S15 and an image side surface S16. The light from the object sequentially passes through the surfaces S1 to S16 and is finally imaged on the imaging surface S17.
  • Table 4 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical imaging system of Example 2, where the units of the radius of curvature and thickness are millimeters (mm).
  • Table 5 shows the higher-order term coefficients that can be used for each aspherical mirror surface in Embodiment 2, where each aspheric surface type can be defined by the formula (1) given in the above Embodiment 1.
  • Table 6 shows the effective focal lengths f1 to f7 of the lenses in Example 2, the total effective focal length f of the optical imaging system, the distance TTL on the optical axis from the object side S1 to the imaging surface S17 of the first lens E1, and the imaging surface S17.
  • the diagonal of the effective pixel area is half ImgH and the maximum half field angle HFOV of the optical imaging system.
  • FIG. 4A shows an on-axis chromatic aberration curve of the optical imaging system of Embodiment 2, which indicates that the focal points of light with different wavelengths deviate after passing through the system.
  • FIG. 4B shows an astigmatism curve of the optical imaging system of Example 2, which represents a meridional image plane curvature and a sagittal image plane curvature.
  • FIG. 4C illustrates a distortion curve of the optical imaging system of Example 2, which represents the magnitude of distortion corresponding to different image heights.
  • FIG. 4D shows a magnification chromatic aberration curve of the optical imaging system of Example 2, which represents the deviation of different image heights on the imaging plane after the light passes through the system. According to FIG. 4A to FIG. 4D, it can be known that the optical imaging system provided in Embodiment 2 can achieve good imaging quality.
  • FIG. 5 is a schematic structural diagram of an optical imaging system according to Embodiment 3 of the present application.
  • the optical imaging system 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, and a first lens.
  • the first lens E1 has a positive power, and the object side surface S1 is a convex surface, and the image side surface S2 is a concave surface.
  • the second lens E2 has a negative power, and the object side surface S3 is a concave surface, and the image side surface S4 is a convex surface.
  • the third lens E3 has a positive power, and the object side surface S5 is a convex surface, and the image side surface S6 is a concave surface.
  • the fourth lens E4 has a positive power, and the object side surface S7 is a concave surface, and the image side surface S8 is a convex surface.
  • the fifth lens E5 has a positive power
  • the object side surface S9 is a concave surface
  • the image side surface S10 is a convex surface.
  • the sixth lens E6 has a negative power
  • the object side surface S11 is a convex surface
  • the image side surface S12 is a concave surface.
  • the seventh lens E7 has a negative power
  • its object side surface S13 is a convex surface
  • its image side surface S14 is a concave surface.
  • the filter E8 has an object side surface S15 and an image side surface S16. The light from the object sequentially passes through the surfaces S1 to S16 and is finally imaged on the imaging surface S17.
  • Table 7 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical imaging system of Example 3.
  • the units of the radius of curvature and thickness are millimeters (mm).
  • Table 8 shows the higher-order term coefficients that can be used for each aspherical mirror surface in Embodiment 3, where each aspheric surface type can be defined by the formula (1) given in Embodiment 1 above.
  • Table 9 shows the effective focal lengths f1 to f7 of each lens in Example 3, the total effective focal length f of the optical imaging system, the distance TTL on the optical axis from the object side S1 to the imaging surface S17 of the first lens E1, and the imaging surface S17.
  • the diagonal of the effective pixel area is half ImgH and the maximum half field angle HFOV of the optical imaging system.
  • FIG. 6A shows an on-axis chromatic aberration curve of the optical imaging system of Embodiment 3, which indicates that the focal points of light with different wavelengths deviate after passing through the system.
  • FIG. 6B shows an astigmatism curve of the optical imaging system of Example 3, which represents a meridional image plane curvature and a sagittal image plane curvature.
  • FIG. 6C shows a distortion curve of the optical imaging system of Example 3, which represents the magnitude of the distortion corresponding to different image heights.
  • Fig. 6D shows a magnification chromatic aberration curve of the optical imaging system of Example 3, which represents the deviation of different image heights on the imaging plane after the light passes through the system. According to FIG. 6A to FIG. 6D, it can be known that the optical imaging system provided in Embodiment 3 can achieve good imaging quality.
  • FIG. 7 is a schematic structural diagram of an optical imaging system according to Embodiment 4 of the present application.
  • the optical imaging system 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 four lenses E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, the filter E8, and the imaging surface S17.
  • the first lens E1 has a positive power, and the object side surface S1 is a convex surface, and the image side surface S2 is a concave surface.
  • the second lens E2 has a negative power, and the object side surface S3 is a concave surface, and the image side surface S4 is a convex surface.
  • the third lens E3 has a positive power, and the object side surface S5 is a convex surface, and the image side surface S6 is a concave surface.
  • the fourth lens E4 has a positive power, and the object side surface S7 is a concave surface, and the image side surface S8 is a convex surface.
  • the fifth lens E5 has a positive power
  • the object side surface S9 is a concave surface
  • the image side surface S10 is a convex surface.
  • the sixth lens E6 has a positive power
  • the object side surface S11 is a convex surface
  • the image side surface S12 is a concave surface.
  • the seventh lens E7 has a negative power
  • its object side surface S13 is a convex surface
  • its image side surface S14 is a concave surface.
  • the filter E8 has an object side surface S15 and an image side surface S16. The light from the object sequentially passes through the surfaces S1 to S16 and is finally imaged on the imaging surface S17.
  • Table 10 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical imaging system of Example 4, where the units of the radius of curvature and thickness are millimeters (mm).
  • Table 11 shows the higher-order term coefficients that can be used for each aspherical mirror surface in Embodiment 4, where each aspheric surface type can be defined by the formula (1) given in Embodiment 1 above.
  • Table 12 shows the effective focal lengths f1 to f7 of the lenses in Example 4, the total effective focal length f of the optical imaging system, the distance TTL on the optical axis from the object side S1 to the imaging surface S17 of the first lens E1, and the imaging surface S17.
  • the diagonal of the effective pixel area is half ImgH and the maximum half field angle HFOV of the optical imaging system.
  • FIG. 8A shows an on-axis chromatic aberration curve of the optical imaging system of Embodiment 4, which indicates that the focal points of light with different wavelengths deviate after passing through the system.
  • FIG. 8B shows an astigmatism curve of the optical imaging system of Example 4, which represents a meridional image plane curvature and a sagittal image plane curvature.
  • FIG. 8C shows a distortion curve of the optical imaging system of Example 4, which represents the value of the distortion magnitude corresponding to different image heights.
  • FIG. 8D shows the magnification chromatic aberration curve of the optical imaging system of Example 4, which represents the deviation of different image heights on the imaging plane after the light passes through the system. According to FIG. 8A to FIG. 8D, it can be known that the optical imaging system provided in Embodiment 4 can achieve good imaging quality.
  • FIG. 9 is a schematic structural diagram of an optical imaging system according to Embodiment 5 of the present application.
  • the optical imaging system 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, and a first lens.
  • the first lens E1 has a positive power, and the object side surface S1 is a convex surface, and the image side surface S2 is a concave surface.
  • the second lens E2 has a negative power, and the object side surface S3 is a concave surface, and the image side surface S4 is a convex surface.
  • the third lens E3 has a negative power, and the object side surface S5 is a convex surface, and the image side surface S6 is a concave surface.
  • the fourth lens E4 has a positive power, and the object side surface S7 is a concave surface, and the image side surface S8 is a convex surface.
  • the fifth lens E5 has a positive power
  • the object side surface S9 is a concave surface
  • the image side surface S10 is a convex surface.
  • the sixth lens E6 has a positive power
  • the object side surface S11 is a convex surface
  • the image side surface S12 is a concave surface.
  • the seventh lens E7 has a negative power
  • its object side surface S13 is a convex surface
  • its image side surface S14 is a concave surface.
  • the filter E8 has an object side surface S15 and an image side surface S16. The light from the object sequentially passes through the surfaces S1 to S16 and is finally imaged on the imaging surface S17.
  • Table 13 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical imaging system of Example 5, where the units of the radius of curvature and thickness are millimeters (mm).
  • Table 14 shows the higher-order term coefficients that can be used for each aspherical mirror surface in Embodiment 5, where each aspheric surface type can be defined by the formula (1) given in Embodiment 1 above.
  • Table 15 shows the effective focal lengths f1 to f7 of each lens in Example 5, the total effective focal length f of the optical imaging system, the distance TTL on the optical axis from the object side S1 to the imaging surface S17 of the first lens E1, and the imaging surface S17.
  • the diagonal of the effective pixel area is half ImgH and the maximum half field angle HFOV of the optical imaging system.
  • FIG. 10A shows an on-axis chromatic aberration curve of the optical imaging system of Embodiment 5, which shows that the focal points of light with different wavelengths deviate after passing through the system.
  • FIG. 10B shows an astigmatism curve of the optical imaging system of Example 5, which represents a meridional image plane curvature and a sagittal image plane curvature.
  • FIG. 10C shows a distortion curve of the optical imaging system of Embodiment 5, which represents the magnitude of the distortion at different viewing angles.
  • FIG. 10D shows the magnification chromatic aberration curve of the optical imaging system of Example 5, which represents the deviation of different image heights on the imaging plane after the light passes through the system. It can be seen from FIGS. 10A to 10D that the optical imaging system given in Embodiment 5 can achieve good imaging quality.
  • FIG. 11 is a schematic structural diagram of an optical imaging system according to Embodiment 6 of the present application.
  • the optical imaging system sequentially includes an aperture STO, a first lens E1, a second lens E2, a third lens E3, The four lenses E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, the filter E8, and the imaging surface S17.
  • the first lens E1 has a positive power, and the object side surface S1 is a convex surface, and the image side surface S2 is a concave surface.
  • the second lens E2 has a negative power, and the object side surface S3 is a concave surface, and the image side surface S4 is a convex surface.
  • the third lens E3 has a positive power, and the object side surface S5 is a convex surface, and the image side surface S6 is a concave surface.
  • the fourth lens E4 has a positive power, and the object side surface S7 is a concave surface, and the image side surface S8 is a convex surface.
  • the fifth lens E5 has a negative power
  • the object side surface S9 is a convex surface
  • the image side surface S10 is a concave surface.
  • the sixth lens E6 has a positive power
  • the object side surface S11 is a convex surface
  • the image side surface S12 is a concave surface.
  • the seventh lens E7 has a negative power
  • its object side surface S13 is a convex surface
  • its image side surface S14 is a concave surface.
  • the filter E8 has an object side surface S15 and an image side surface S16. The light from the object sequentially passes through the surfaces S1 to S16 and is finally imaged on the imaging surface S17.
  • Table 16 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical imaging system of Example 6, where the units of the radius of curvature and thickness are millimeters (mm).
  • Table 17 shows the higher-order term coefficients that can be used for each aspherical mirror surface in Embodiment 6, where each aspheric surface type can be defined by the formula (1) given in Embodiment 1 above.
  • Table 18 shows the effective focal lengths f1 to f7 of the lenses in Example 6, the total effective focal length f of the optical imaging system, the distance TTL on the optical axis from the object side S1 to the imaging surface S17 of the first lens E1, and the imaging surface S17.
  • the diagonal of the effective pixel area is half ImgH and the maximum half field angle HFOV of the optical imaging system.
  • FIG. 12A shows an on-axis chromatic aberration curve of the optical imaging system of Embodiment 6, which indicates that the focal points of light with different wavelengths deviate after passing through the system.
  • FIG. 12B shows an astigmatism curve of the optical imaging system of Example 6, which represents a meridional image plane curvature and a sagittal image plane curvature.
  • FIG. 12C shows a distortion curve of the optical imaging system of Example 6, which represents the magnitude of the distortion corresponding to different image heights.
  • FIG. 12D shows a magnification chromatic aberration curve of the optical imaging system of Example 6, which represents deviations of different image heights on the imaging plane after light passes through the system. According to FIG. 12A to FIG. 12D, it can be known that the optical imaging system provided in Embodiment 6 can achieve good imaging quality.
  • FIG. 13 is a schematic structural diagram of an optical imaging system according to Embodiment 7 of the present application.
  • the optical imaging system 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, and a first lens.
  • the first lens E1 has a positive power, and the object side surface S1 is a convex surface, and the image side surface S2 is a concave surface.
  • the second lens E2 has a negative power, and the object side surface S3 is a concave surface, and the image side surface S4 is a convex surface.
  • the third lens E3 has a negative power, and the object side surface S5 is a convex surface, and the image side surface S6 is a concave surface.
  • the fourth lens E4 has a positive power, and the object side surface S7 is a concave surface, and the image side surface S8 is a convex surface.
  • the fifth lens E5 has a negative power
  • the object side surface S9 is a concave surface
  • the image side surface S10 is a convex surface.
  • the sixth lens E6 has a positive power
  • the object side surface S11 is a convex surface
  • the image side surface S12 is a concave surface.
  • the seventh lens E7 has a negative power
  • its object side surface S13 is a convex surface
  • its image side surface S14 is a concave surface.
  • the filter E8 has an object side surface S15 and an image side surface S16. The light from the object sequentially passes through the surfaces S1 to S16 and is finally imaged on the imaging surface S17.
  • Table 19 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical imaging system of Example 7, where the units of the radius of curvature and thickness are both millimeters (mm).
  • Table 20 shows the higher-order term coefficients that can be used for each aspherical mirror surface in Embodiment 7, where each aspheric surface type can be defined by the formula (1) given in Embodiment 1 above.
  • Table 21 shows the effective focal lengths f1 to f7 of the lenses in Example 7, the total effective focal length f of the optical imaging system, the distance TTL on the optical axis from the object side S1 to the imaging surface S17 of the first lens E1, and the imaging surface S17.
  • the diagonal of the effective pixel area is half ImgH and the maximum half field angle HFOV of the optical imaging system.
  • FIG. 14A shows an on-axis chromatic aberration curve of the optical imaging system of Embodiment 7, which indicates that the focal points of light with different wavelengths deviate after passing through the system.
  • FIG. 14B shows an astigmatism curve of the optical imaging system of Example 7, which represents a meridional image plane curvature and a sagittal image plane curvature.
  • FIG. 14C illustrates a distortion curve of the optical imaging system of Example 7, which represents the magnitude of distortion corresponding to different image heights.
  • FIG. 14D shows a magnification chromatic aberration curve of the optical imaging system of Example 7, which represents deviations of different image heights on the imaging plane after light passes through the system.
  • the optical imaging system provided in Embodiment 7 can achieve good imaging quality.
  • FIG. 15 is a schematic structural diagram of an optical imaging system according to Embodiment 8 of the present application.
  • the optical imaging system 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 four lenses E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, the filter E8, and the imaging surface S17.
  • the first lens E1 has a positive power, and the object side surface S1 is a convex surface, and the image side surface S2 is a concave surface.
  • the second lens E2 has a negative power, and the object side surface S3 is a concave surface, and the image side surface S4 is a convex surface.
  • the third lens E3 has a negative power, and the object side surface S5 is a concave surface, and the image side surface S6 is a concave surface.
  • the fourth lens E4 has a positive power, and the object side surface S7 is a concave surface, and the image side surface S8 is a convex surface.
  • the fifth lens E5 has a negative power
  • the object side surface S9 is a concave surface
  • the image side surface S10 is a convex surface.
  • the sixth lens E6 has a positive power
  • the object side surface S11 is a convex surface
  • the image side surface S12 is a concave surface.
  • the seventh lens E7 has a negative power
  • its object side surface S13 is a convex surface
  • its image side surface S14 is a concave surface.
  • the filter E8 has an object side surface S15 and an image side surface S16. The light from the object sequentially passes through the surfaces S1 to S16 and is finally imaged on the imaging surface S17.
  • Table 22 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical imaging system of Example 8, where the units of the radius of curvature and thickness are millimeters (mm).
  • Table 23 shows the higher-order term coefficients that can be used for each aspherical mirror surface in Embodiment 8, where each aspheric surface type can be defined by the formula (1) given in the above-mentioned Embodiment 1.
  • Table 24 shows the effective focal lengths f1 to f7 of each lens in Example 8, the total effective focal length f of the optical imaging system, the distance TTL on the optical axis from the object side S1 to the imaging surface S17 of the first lens E1, and the imaging surface S17.
  • the diagonal of the effective pixel area is half ImgH and the maximum half field angle HFOV of the optical imaging system.
  • FIG. 16A shows an on-axis chromatic aberration curve of the optical imaging system of Embodiment 8, which indicates that the focal points of light with different wavelengths deviate after passing through the system.
  • FIG. 16B shows an astigmatism curve of the optical imaging system of Example 8, which represents a meridional image plane curvature and a sagittal image plane curvature.
  • FIG. 16C shows a distortion curve of the optical imaging system of Example 8, which represents the value of the distortion magnitude corresponding to different image heights.
  • FIG. 16D shows a magnification chromatic aberration curve of the optical imaging system of Example 8, which represents the deviation of different image heights on the imaging plane after the light passes through the system. It can be seen from FIGS. 16A to 16D that the optical imaging system given in Embodiment 8 can achieve good imaging quality.
  • FIG. 17 is a schematic structural diagram of an optical imaging system according to Embodiment 9 of the present application.
  • the optical imaging system 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, and a first lens.
  • the first lens E1 has a positive power, and the object side surface S1 is a convex surface, and the image side surface S2 is a concave surface.
  • the second lens E2 has a negative power, and the object side surface S3 is a concave surface, and the image side surface S4 is a convex surface.
  • the third lens E3 has a positive power, and the object side surface S5 is a concave surface, and the image side surface S6 is a convex surface.
  • the fourth lens E4 has a positive power, and the object side surface S7 is a concave surface, and the image side surface S8 is a convex surface.
  • the fifth lens E5 has a negative power
  • the object side surface S9 is a concave surface
  • the image side surface S10 is a convex surface.
  • the sixth lens E6 has a positive power
  • the object side surface S11 is a convex surface
  • the image side surface S12 is a concave surface.
  • the seventh lens E7 has a negative power
  • its object side surface S13 is a convex surface
  • its image side surface S14 is a concave surface.
  • the filter E8 has an object side surface S15 and an image side surface S16. The light from the object sequentially passes through the surfaces S1 to S16 and is finally imaged on the imaging surface S17.
  • Table 25 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical imaging system of Example 9, where the units of the radius of curvature and thickness are millimeters (mm).
  • Table 26 shows the higher-order term coefficients that can be used for each aspherical mirror surface in Embodiment 9, where each aspheric surface type can be defined by the formula (1) given in Embodiment 1 above.
  • Table 27 shows the effective focal lengths f1 to f7 of the lenses in Example 9, the total effective focal length f of the optical imaging system, the distance TTL on the optical axis from the object side S1 to the imaging surface S17 of the first lens E1, and the imaging surface S17.
  • the diagonal of the effective pixel area is half ImgH and the maximum half field angle HFOV of the optical imaging system.
  • FIG. 18A shows an on-axis chromatic aberration curve of the optical imaging system of Embodiment 9, which indicates that the focal points of light with different wavelengths deviate through the system.
  • FIG. 18B shows an astigmatism curve of the optical imaging system of Example 9, which represents a meridional image plane curvature and a sagittal image plane curvature.
  • FIG. 18C shows a distortion curve of the optical imaging system of Example 9, which represents the magnitude of the distortion corresponding to different image heights.
  • FIG. 18D shows a magnification chromatic aberration curve of the optical imaging system of Example 9, which represents the deviation of different image heights on the imaging plane after the light passes through the system.
  • the optical imaging system provided in Embodiment 9 can achieve good imaging quality.
  • FIG. 19 is a schematic structural diagram of an optical imaging system according to Embodiment 10 of the present application.
  • the optical imaging system 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, and a first lens.
  • the first lens E1 has a positive power, and the object side surface S1 is a convex surface, and the image side surface S2 is a concave surface.
  • the second lens E2 has a negative power, and the object side surface S3 is a concave surface, and the image side surface S4 is a convex surface.
  • the third lens E3 has a negative power, and the object side surface S5 is a convex surface, and the image side surface S6 is a concave surface.
  • the fourth lens E4 has a positive power, and the object side surface S7 is a concave surface, and the image side surface S8 is a convex surface.
  • the fifth lens E5 has a negative power
  • the object side surface S9 is a concave surface
  • the image side surface S10 is a convex surface.
  • the sixth lens E6 has a negative power
  • the object side surface S11 is a convex surface
  • the image side surface S12 is a concave surface.
  • the seventh lens E7 has a negative power
  • its object side surface S13 is a convex surface
  • its image side surface S14 is a concave surface.
  • the filter E8 has an object side surface S15 and an image side surface S16. The light from the object sequentially passes through the surfaces S1 to S16 and is finally imaged on the imaging surface S17.
  • Table 28 shows the surface type, the radius of curvature, the thickness, the material, and the conic coefficient of each lens of the optical imaging system of Example 10.
  • the units of the radius of curvature and the thickness are millimeters (mm).
  • Table 29 shows the higher-order coefficients that can be used for each aspherical mirror surface in Embodiment 10, where each aspherical surface type can be defined by the formula (1) given in the above-mentioned Embodiment 1.
  • Table 30 shows the effective focal lengths f1 to f7 of each lens in Example 10, the total effective focal length f of the optical imaging system, the distance TTL on the optical axis from the object side S1 to the imaging surface S17 of the first lens E1, and the imaging surface S17.
  • the diagonal of the effective pixel area is half ImgH and the maximum half field angle HFOV of the optical imaging system.
  • FIG. 20A shows an on-axis chromatic aberration curve of the optical imaging system of Example 10, which indicates that the focal points of light with different wavelengths deviate after passing through the system.
  • FIG. 20B shows an astigmatism curve of the optical imaging system of Example 10, which represents a meridional image plane curvature and a sagittal image plane curvature.
  • FIG. 20C shows a distortion curve of the optical imaging system of Example 10, which represents the magnitude of distortion corresponding to different image heights.
  • FIG. 20D shows a magnification chromatic aberration curve of the optical imaging system of Example 10, which represents deviations of different image heights on the imaging plane after light passes through the system. It can be seen from FIGS. 20A to 20D that the optical imaging system provided in Embodiment 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 system described above.

Abstract

一种光学成像系统，该光学成像系统沿着光轴由物侧至像侧依序包括：第一透镜、第二透镜、第三透镜、第四透镜、第五透镜、第六透镜和第七透镜。其中，第一透镜具有正光焦度；第二透镜具有负光焦度，其物侧面为凹面，像侧面为凸面；第三透镜具有光焦度；第四透镜具有正光焦度，其物侧面为凹面，像侧面为凸面；第五透镜具有光焦度；第六透镜具有光焦度；第七透镜具有负光焦度，其物侧面为凸面。光学成像系统的总有效焦距f与光学成像系统的入瞳直径EPD满足f/EPD≤1.8。

Description

光学成像系统
相关申请的交叉引用
本申请要求于2018年07月09日提交于中国国家知识产权局(CNIPA)的、专利申请号为201810746192.9的中国专利申请的优先权和权益，该中国专利申请通过引用整体并入本文。
技术领域
本申请涉及一种光学成像系统，更具体地，本申请涉及一种包括七片透镜的光学成像系统。
背景技术
随着科学技术的发展，便携式电子产品逐步兴起，具有摄像功能的便携式电子产品得到人们更多的青睐，因此市场对适用于便携式电子产品的摄像镜头的需求逐渐增大。一方面，由于例如智能手机等便携式电子产品趋于小型化，限制了镜头的总长，从而增加了镜头的设计难度。另一方面，随着例如感光耦合元件(CCD)或互补性氧化金属半导体元件(CMOS)等常用感光元件性能的提高及尺寸的减小，使得感光元件的像元数增加及像元尺寸减小，从而对相配套的摄像镜头的高成像品质及小型化均提出了更高的要求。
为了满足小型化的要求，现有镜头通常配置的光圈数(F数)均在2.0或2.0以上，以兼顾小型化与良好的光学性能。但是随着智能手机等便携式电子产品的不断发展，对配套使用的摄像镜头提出了更高的要求，特别是在光线不足(如阴雨天、黄昏等)、手抖等情况下，F数为2.0或2.0以上的镜头已经无法满足更高阶的成像要求。
发明内容
本申请提供了可适用于便携式电子产品的、可至少解决或部分解决现有技术中的上述至少一个缺点的光学成像系统，例如大孔径成像镜头。
本申请一方面提供了这样一种光学成像系统，该成像系统沿着光轴由物侧至像侧依序包括：第一透镜、第二透镜、第三透镜、第四透镜、第五透镜、第六透镜和第七透镜。其中，第一透镜可具有正光焦度；第二透镜可具有负光焦度，其物侧面可为凹面，像侧面可为凸面；第三透镜具有光焦度；第四透镜可具有正光焦度，其物侧面可为凹面，像侧面可为凸面；第五透镜具有光焦度；第六透镜具有光焦度；第七透镜可具有负光焦度，其物侧面可为凸面。
在一个实施方式中，光学成像系统的总有效焦距f与光学成像系统的入瞳直径EPD可满足f/EPD≤1.8。
在一个实施方式中，光学成像系统的总有效焦距f与第一透镜的有效焦距f1可满足1≤f/f1＜1.5。
在一个实施方式中，光学成像系统的总有效焦距f与第七透镜的有效焦距f7可满足-1＜f/f7＜0。
在一个实施方式中，第一透镜像侧面的曲率半径R2与第一透镜物侧面的曲率半径R1可满足1＜R2/(R1*2)≤2.5。
在一个实施方式中，第七透镜的物侧面的曲率半径R13、第七透镜的像侧面的曲率半径R14、第六透镜的物侧面的曲率半径R11与第六透镜的像侧面的曲率半径R12可满足0.3＜(R13+R14)/(R11+R12)＜1。
在一个实施方式中，第一透镜在光轴上的中心厚度CT1、第二透镜在光轴上的中心厚度CT2、第三透镜在光轴上的中心厚度CT3与第四透镜在光轴上的中心厚度CT4可满足0.7≤CT1/(CT2+CT3+CT4)＜1.1。
在一个实施方式中，第二透镜和第三透镜在光轴上的间隔距离T23与第三透镜在光轴上的中心厚度CT3可满足0.1≤T23/CT3＜0.8。
在一个实施方式中，第三透镜和第四透镜的组合焦距f34与第五透镜和第六透镜的组合焦距f56可满足-5＜f34/f56＜1。
在一个实施方式中，第一透镜至第七透镜分别于光轴上的中心厚度的总和∑CT与第一透镜的物侧面至光学成像系统的成像面在光轴上的距离TTL可满足0.5≤∑CT/TTL≤0.7。
在一个实施方式中，光学成像系统的总有效焦距f与光学成像系统的最大半视场角HFOV可满足3.9mm≤f*TAN(HFOV)＜4.5mm。
本申请采用了多片(例如，七片)透镜，通过合理分配各透镜的光焦度、面型、各透镜的中心厚度以及各透镜之间的轴上间距等，使得上述光学成像系统具有超薄、小型化、大孔径、高成像品质等至少一个有益效果。
附图说明
结合附图，通过以下非限制性实施方式的详细描述，本申请的其他特征、目的和优点将变得更加明显。在附图中：
图1示出了根据本申请实施例1的光学成像系统的结构示意图；图2A至图2D分别示出了实施例1的光学成像系统的轴上色差曲线、象散曲线、畸变曲线以及倍率色差曲线；
图3示出了根据本申请实施例2的光学成像系统的结构示意图；图4A至图4D分别示出了实施例2的光学成像系统的轴上色差曲线、象散曲线、畸变曲线以及倍率色差曲线；
图5示出了根据本申请实施例3的光学成像系统的结构示意图；图6A至图6D分别示出了实施例3的光学成像系统的轴上色差曲线、象散曲线、畸变曲线以及倍率色差曲线；
图7示出了根据本申请实施例4的光学成像系统的结构示意图；图8A至图8D分别示出了实施例4的光学成像系统的轴上色差曲线、象散曲线、畸变曲线以及倍率色差曲线；
图9示出了根据本申请实施例5的光学成像系统的结构示意图；图10A至图10D分别示出了实施例5的光学成像系统的轴上色差曲线、象散曲线、畸变曲线以及倍率色差曲线；
图11示出了根据本申请实施例6的光学成像系统的结构示意图；图12A至图12D分别示出了实施例6的光学成像系统的轴上色差曲线、象散曲线、畸变曲线以及倍率色差曲线；
图13示出了根据本申请实施例7的光学成像系统的结构示意图；图14A至图14D分别示出了实施例7的光学成像系统的轴上色差曲线、象散曲线、畸变曲线以及倍率色差曲线；
图15示出了根据本申请实施例8的光学成像系统的结构示意图；图16A至图16D分别示出了实施例8的光学成像系统的轴上色差曲线、象散曲线、畸变曲线以及倍率色差曲线；
图17示出了根据本申请实施例9的光学成像系统的结构示意图；图18A至图18D分别示出了实施例9的光学成像系统的轴上色差曲线、象散曲线、畸变曲线以及倍率色差曲线；
图19示出了根据本申请实施例10的光学成像系统的结构示意图；图20A至图20D分别示出了实施例10的光学成像系统的轴上色差曲线、象散曲线、畸变曲线以及倍率色差曲线。
具体实施方式
为了更好地理解本申请，将参考附图对本申请的各个方面做出更详细的说明。应理解，这些详细说明只是对本申请的示例性实施方式的描述，而非以任何方式限制本申请的范围。在说明书全文中，相同的附图标号指代相同的元件。表述“和/或”包括相关联的所列项目中的一个或多个的任何和全部组合。
应注意，在本说明书中，第一、第二、第三等的表述仅用于将一个特征与另一个特征区分开来，而不表示对特征的任何限制。因此，在不背离本申请的教导的情况下，下文中讨论的第一透镜也可被称作第二透镜或第三透镜。
在附图中，为了便于说明，已稍微夸大了透镜的厚度、尺寸和形状。具体来讲，附图中所示的球面或非球面的形状通过示例的方式示出。即，球面或非球面的形状不限于附图中示出的球面或非球面的形状。附图仅为示例而并非严格按比例绘制。
在本文中，近轴区域是指光轴附近的区域。若透镜表面为凸面且未界定该凸面位置时，则表示该透镜表面至少于近轴区域为凸面；若透镜表面为凹面且未界定该凹面位置时，则表示该透镜表面至少于近轴区域为凹面。每个透镜中，最靠近物侧的表面称为该透镜的物侧面；每个透镜中，最靠近像侧的表面称为该透镜的像侧面。
还应理解的是，用语“包括”、“包括有”、“具有”、“包含”和/或“包含有”，当在本说明书中使用时表示存在所陈述的特征、元件和/或部件，但不排除存在或附加有一个或多个其它特征、元件、部件和/或它们的组合。此外，当诸如“...中的至少一个”的表述出现在所列特征的列表之后时，修饰整个所列特征，而不是修饰列表中的单独元件。此外，当描述本申请的实施方式时，使用“可”表示“本申请的一个或多个实施方式”。并且，用语“示例性的”旨在指代示例或举例说明。
除非另外限定，否则本文中使用的所有用语(包括技术用语和科学用语)均具有与本申请所属领域普通技术人员的通常理解相同的含义。还应理解的是，用语(例如在常用词典中定义的用语)应被解释为具有与它们在相关技术的上下文中的含义一致的含义，并且将不被以理想化或过度正式意义解释，除非本文中明确如此限定。
需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互组合。下面将参考附图并结合实施例来详细说明本申请。以下对本申请的特征、原理和其他方面进行详细描述。
根据本申请示例性实施方式的光学成像系统可包括例如七片具有光焦度的透镜，即，第一透镜、第二透镜、第三透镜、第四透镜、第五透镜、第六透镜和第七透镜。这七片透镜沿着光轴由物侧至像侧依序排列，且任意相邻两透镜之间均可具有空气间隔。
在示例性实施方式中，第一透镜可具有正光焦度；第二透镜可具有负光焦度，其物侧面可为凹面，像侧面可为凸面；第三透镜具有正光焦度或负光焦度；第四透镜可具有正光焦度，其物侧面可为凹面，像侧面可为凸面；第五透镜具有正光焦度或负光焦度；第六透镜具有正光焦度或负光焦度；以及第七透镜可具有负光焦度，其物侧面可为凸面。
在示例性实施方式中，第一透镜的物侧面可为凸面，像侧面可为凹面。
在示例性实施方式中，第六透镜的物侧面可为凸面，像侧面可为凹面。
在示例性实施方式中，第七透镜的像侧面可为凹面。
在示例性实施方式中，本申请的光学成像系统可满足条件式f/EPD≤1.8，其中，f为光学成像系统的总有效焦距，EPD为光学成像系统的入瞳直径。更具体地，f和EPD进一步可满足1.60≤f/EPD≤1.77。通过合理控制光学成像系统的总有效焦距与入瞳直径的比值，有利于增大镜头在单位时间内的通光量，使光学成像系统具有高像素、大孔径优势，从而能在减小边缘视场像差的同时增强暗环境下的成像效果，并有效地控制系统的畸变量。
在示例性实施方式中，本申请的光学成像系统可满足条件式3.9mm≤f*TAN(HFOV)＜4.5mm，其中，f为光学成像系统的总有效焦距，HFOV为光学成像系统的最大半视场角。更具体地，f和HFOV进一步可满足3.90mm≤f*TAN(HFOV)＜4.10mm，例如，3.90mm≤f*TAN(HFOV)≤3.95mm。通过控制光学成像系统的总有效焦距和光学成像系统的最大半视场角，将光学系统的像高控制在一定合理范围内，从而可以保证与大像面芯片的匹配，使得系统同时具有高像素、低敏感度、容易加工等特点。
在示例性实施方式中，本申请的光学成像系统可满足条件式1≤f/f1＜1.5，其中，f为光学成像系统的总有效焦距，f1为第一透镜的有效焦距。更具体地，f和f1进一步可满足1.02≤f/f1≤1.22。通过将第一透镜的正光焦度控制在合理范围，既可以使第一透镜承担系统所需要的正的光焦度，又能够将第一透镜贡献的球差控制在一定范围内，进而保证后续光学透镜能够合理地校正第一透镜所贡献的负球差，使得系统在轴上视场区域具有较佳像质。
在示例性实施方式中，本申请的光学成像系统可满足条件式-1＜f/f7＜0，其中，f为光学成像系统的总有效焦距，f7为第七透镜的有效焦距。更具体地，f和f7进一步可满足-0.76≤f/f7≤-0.25。通过将第七透镜的光焦度约束在合理的范围内，使其贡献的三阶正球差和五阶负球差在合理范围，以能够对前面透镜产生的剩余球差进行平衡，使得系统在轴上视场区域的像质达到较好的水平。
在示例性实施方式中，本申请的光学成像系统可满足条件式1＜R2/(R1*2)≤2.5，其中，R2为第一透镜像侧面的曲率半径，R1为第一透镜物侧面的曲率半径。更具体地，R2和R1进一步可满足1.49≤R2/(R1*2)≤2.48。通过控制第一透镜物侧面和像侧面的曲率半径，能够将光线在第一透镜物侧面及像侧面的边缘视场处的总偏转角度控制在合理的范围内，从而能够有效地降低系统的敏感性。
在示例性实施方式中，本申请的光学成像系统可满足条件式0.3＜(R13+R14)/(R11+R12)＜1，其中，R13为第七透镜的物侧面的曲率半径，R14为第七透镜的像侧面的曲率半径，R11为第六透镜的物侧面的曲率半径，R12为第六透镜的像侧面的曲率半径。更具体地，R13、R14、R11和R12进一步可满足0.38≤(R13+R14)/(R11+R12)≤0.73。通过控制第六透镜和第七透镜物侧面及像侧面的曲率半径，能够合理控制各个视场的主光线在像面的入射角，进而有利于满足光学系统设计中对主光线入射角度的要求。
在示例性实施方式中，本申请的光学成像系统可满足条件式0.7≤CT1/(CT2+CT3+CT4)＜1.1，其中，CT1为第一透镜在光轴上的中心厚度，CT2为第二透镜在光轴上的中心厚度，CT3为第三透镜在光轴上的中心厚度，CT4为第四透镜在光轴上的中心厚度。更具体地，CT1、CT2、CT3和CT4进一步可满足0.73≤CT1/(CT2+CT3+CT4)≤1.03。满足条件式0.7≤CT1/(CT2+CT3+CT4)＜1.1，使得第一透镜、第二透镜、第三透镜、第四透镜的中心厚度处在一定合理范围内，即有利于保证镜头的加工特性，又有利于使镜头满足超薄特性。
在示例性实施方式中，本申请的光学成像系统可满足条件式0.1≤T23/CT3＜0.8，其中，T23为第二透镜和第三透镜在光轴上的间隔距离，CT3为第三透镜在光轴上的中心厚度。更具体地，T23和CT3进一步可满足0.11≤T23/CT3≤0.59。通过合理约束第二透镜和第三透镜的间隔距离与第三透镜的中心厚度的比值，能够有效地保证系统的场曲和畸变量，使得其轴外视场具有良好的成像质量。
在示例性实施方式中，本申请的光学成像系统可满足条件式-5＜f34/f56＜1，其中，f34为第三透镜和第四透镜的组合焦距，f56为第五透镜和第六透镜的组合焦距。更具体地，f34和f56进一步可满足-4.82≤f34/f56≤0.91。通过合理控制第三透镜和第四透镜的组合焦距及第五透镜和第六透镜的组合焦距，能够合理控制这四个透镜像差的贡献量，使得这四个透镜的像差贡献量能够与前端光学透镜所产生的像差进行平衡，使系统像差处于合理的水平状态，进而使光学成像系统具有良好的成像质量。
在示例性实施方式中，本申请的光学成像系统可满足条件式0.5≤∑CT/TTL≤0.7，其中，∑CT为第一透镜至第七透镜分别于光轴上的中心厚度的总和，TTL为第一透镜的物侧面至光学成像系统的成像面在光轴上的距离。更具体地，∑CT和TTL进一步可满足0.54≤∑CT/TTL≤0.62。通过合理控制第一透镜、第二透镜、第三透镜、第四透镜、第五透镜、第六透镜及第七透镜的中心厚度的总和，能够合理控制七片透镜平衡后剩余畸变的范围，使得系统具有良好的畸变表现。
在示例性实施方式中，光学成像系统还可包括光阑，以提升成像系统的成像质量。光阑可根据需要设置在物侧与像侧之间的任意位置处，例如，光阑可设置在物侧与第一透镜之间。可选地，上述光学成像系统还可包括用于校正色彩偏差的滤光片和/或用于保护位于成像面上的感光元件的保护玻璃。
根据本申请的上述实施方式的光学成像系统可采用多片镜片，例如上文所述的七片。通过合理分配各透镜的光焦度、面型、各透镜的中心厚度以及各透镜之间的轴上间距等，可有效地缩小系统的体积、降低系统的敏感度并提高系统的可加工性，使得光学成像系统更有利于生产加工并且可适用于便携式电子产品。另外，通过上述配置的光学成像系统，还可具有例如超薄、小型化、大孔径、高成像质量等有益效果。
在本申请的实施方式中，各透镜的镜面中的至少一个为非球面镜面。非球面透镜的特点是：从透镜中心到透镜周边，曲率是连续变化的。与从透镜中心到透镜周边具有恒定曲率的球面透镜不同，非球面透镜具有更佳的曲率半径特性，具有改善歪曲像差及改善像散像差的优点。采用非球面透镜后，能够尽可能地消除在成像的时候出现的像差，从而改善成像质量。
然而，本领域的技术人员应当理解，在未背离本申请要求保护的技术方案的情况下，可改变构成光学成像系统的透镜数量，来获得本说明书中描述的各个结果和优点。例如，虽然在实施方式中以七个透镜为例进行了描述，但是该光学成像系统不限于包括七个透镜。如果需要，该光学成像系统还可包括其 它数量的透镜。下面参照附图进一步描述可适用于上述实施方式的光学成像系统的具体实施例。
实施例1
以下参照图1至图2D描述根据本申请实施例1的光学成像系统。图1示出了根据本申请实施例1的光学成像系统的结构示意图。
如图1所示，根据本申请示例性实施方式的光学成像系统沿光轴由物侧至像侧依序包括：光阑STO、第一透镜E1、第二透镜E2、第三透镜E3、第四透镜E4、第五透镜E5、第六透镜E6、第七透镜E7、滤光片E8和成像面S17。
第一透镜E1具有正光焦度，其物侧面S1为凸面，像侧面S2为凹面。第二透镜E2具有负光焦度，其物侧面S3为凹面，像侧面S4为凸面。第三透镜E3具有负光焦度，其物侧面S5为凸面，像侧面S6为凹面。第四透镜E4具有正光焦度，其物侧面S7为凹面，像侧面S8为凸面。第五透镜E5具有正光焦度，其物侧面S9为凹面，像侧面S10为凸面。第六透镜E6具有负光焦度，其物侧面S11为凸面，像侧面S12为凹面。第七透镜E7具有负光焦度，其物侧面S13为凸面，像侧面S14为凹面。滤光片E8具有物侧面S15和像侧面S16。来自物体的光依序穿过各表面S1至S16并最终成像在成像面S17上。
表1示出了实施例1的光学成像系统的各透镜的表面类型、曲率半径、厚度、材料及圆锥系数，其中，曲率半径和厚度的单位均为毫米(mm)。
Figure PCTCN2019081361-appb-000001
表1
由表1可知，第一透镜E1至第七透镜E7中的任意一个透镜的物侧面和像侧面均为非球面。在本实施例中，各非球面透镜的面型x可利用但不限于以下非球面公式进行限定：
Figure PCTCN2019081361-appb-000002
其中，x为非球面沿光轴方向在高度为h的位置时，距非球面顶点的距离矢高；c为非球面的近轴曲率，c＝1/R(即，近轴曲率c为上表1中曲率半径R的倒数)；k为圆锥系数(在表1中已给出)；Ai是非球面第i-th阶的修正系数。下表2给出了可用于实施例1中各非球面镜面S1-S14的高次项系数A 4、A 6、A 8、A 10、A 12、A 14、A 16、A 18和A 20。
面号 A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 9.3984E-04 -1.4241E-02 4.5529E-02 -8.6489E-02 9.9292E-02 -7.1064E-02 3.0874E-02 -7.4851E-03 7.7395E-04
S2 -1.2164E-02 2.5617E-04 -1.0874E-03 8.5633E-03 -1.0878E-02 6.6203E-03 -2.1397E-03 3.2787E-04 -1.3479E-05
S3 -7.3263E-03 2.6394E-04 1.2216E-02 -1.6279E-02 1.8783E-02 -1.6161E-02 8.7066E-03 -2.5558E-03 3.1607E-04
S4 -1.7700E-03 2.4464E-04 -6.3335E-04 2.0720E-03 -2.6951E-03 1.6091E-03 -5.5396E-04 1.0147E-04 -7.8847E-06
S5 -3.2560E-02 -1.1551E-02 2.5100E-02 -7.5281E-02 1.3011E-01 -1.3412E-01 8.1567E-02 -2.6910E-02 3.6787E-03
S6 -2.3848E-02 1.4849E-02 -7.4202E-02 2.0054E-01 -3.2274E-01 3.2516E-01 -1.9672E-01 6.5618E-02 -9.2267E-03
S7 -1.9919E-02 4.4035E-03 -2.5473E-02 3.4874E-02 -2.1120E-02 -1.1577E-02 2.6190E-02 -1.5316E-02 3.2277E-03
S8 -2.4045E-02 -3.1983E-03 -2.5589E-03 -2.3204E-03 7.9027E-03 -1.0895E-02 7.5881E-03 -2.7213E-03 4.1286E-04
S9 -3.5895E-02 4.7549E-03 -1.4475E-01 3.7512E-01 -5.1055E-01 3.9905E-01 -1.8143E-01 4.4444E-02 -4.5019E-03
S10 7.0291E-03 -2.0419E-01 2.7004E-01 -2.0752E-01 8.5691E-02 -1.2200E-02 -2.9210E-03 1.2153E-03 -1.1747E-04
S11 7.6409E-02 -2.1360E-01 1.9500E-01 -1.2737E-01 5.0916E-02 -1.1181E-02 1.1637E-03 -2.2637E-05 -3.3909E-06
S12 -1.7105E-02 -1.4637E-02 -2.2165E-03 4.0094E-03 -1.8733E-03 4.9939E-04 -7.2599E-05 4.8005E-06 -7.4651E-08
S13 -3.1455E-01 1.2949E-01 -3.1959E-02 5.8273E-03 -8.4398E-04 9.3610E-05 -7.1613E-06 3.2518E-07 -6.4932E-09
S14 -2.5933E-01 1.2818E-01 -5.3066E-02 1.5588E-02 -2.9955E-03 3.6370E-04 -2.6751E-05 1.0853E-06 -1.8607E-08
表2
表3给出实施例1中各透镜的有效焦距f1至f7、光学成像系统的总有效焦距f、第一透镜E1的物侧面S1至成像面S17在光轴上的距离TTL、成像面S17上有效像素区域对角线长的一半ImgH以及光学成像系统的最大半视场角HFOV。
f1(mm) 4.10 f7(mm) -10.96
f2(mm) -1112.41 f(mm) 4.92
f3(mm) -15.00 TTL(mm) 5.55
f4(mm) 39.33 ImgH(mm) 3.96
f5(mm) 849.20 HFOV(°) 38.7
f6(mm) -31.24    
表3
图2A示出了实施例1的光学成像系统的轴上色差曲线，其表示不同波长的光线经由系统后的会聚焦点偏离。图2B示出了实施例1的光学成像系统的象散曲线，其表示子午像面弯曲和弧矢像面弯曲。图2C示出了实施例1的光学成像系统的畸变曲线，其表示不同像高处对应的畸变大小值。图2D示出了实施例1的光学成像系统的倍率色差曲线，其表示光线经由系统后在成像面上的不同的像高的偏差。根据图2A至图2D可知，实施例1所给出的光学成像系统能够实现良好的成像品质。
实施例2
以下参照图3至图4D描述根据本申请实施例2的光学成像系统。在本实施例及以下实施例中，为简洁起见，将省略部分与实施例1相似的描述。图3示出了根据本申请实施例2的光学成像系统的结构示意图。
如图3所示，根据本申请示例性实施方式的光学成像系统沿光轴由物侧至像侧依序包括：光阑STO、 第一透镜E1、第二透镜E2、第三透镜E3、第四透镜E4、第五透镜E5、第六透镜E6、第七透镜E7、滤光片E8和成像面S17。
第一透镜E1具有正光焦度，其物侧面S1为凸面，像侧面S2为凹面。第二透镜E2具有负光焦度，其物侧面S3为凹面，像侧面S4为凸面。第三透镜E3具有正光焦度，其物侧面S5为凸面，像侧面S6为凹面。第四透镜E4具有正光焦度，其物侧面S7为凹面，像侧面S8为凸面。第五透镜E5具有负光焦度，其物侧面S9为凹面，像侧面S10为凸面。第六透镜E6具有负光焦度，其物侧面S11为凸面，像侧面S12为凹面。第七透镜E7具有负光焦度，其物侧面S13为凸面，像侧面S14为凹面。滤光片E8具有物侧面S15和像侧面S16。来自物体的光依序穿过各表面S1至S16并最终成像在成像面S17上。
表4示出了实施例2的光学成像系统的各透镜的表面类型、曲率半径、厚度、材料及圆锥系数，其中，曲率半径和厚度的单位均为毫米(mm)。表5示出了可用于实施例2中各非球面镜面的高次项系数，其中，各非球面面型可由上述实施例1中给出的公式(1)限定。表6给出实施例2中各透镜的有效焦距f1至f7、光学成像系统的总有效焦距f、第一透镜E1的物侧面S1至成像面S17在光轴上的距离TTL、成像面S17上有效像素区域对角线长的一半ImgH以及光学成像系统的最大半视场角HFOV。
Figure PCTCN2019081361-appb-000003
表4
面号 A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 2.8352E-05 -7.4615E-05 4.1434E-05 -1.3671E-05 2.7259E-06 -3.3885E-07 2.5568E-08 -1.0766E-09 1.9330E-11
S2 -1.0730E-03 6.7109E-06 -8.4606E-06 1.9788E-05 -7.4654E-06 1.3494E-06 -1.2953E-07 5.8947E-09 -7.1974E-11
S3 -6.2381E-05 2.0738E-07 8.8565E-07 -1.0891E-07 1.1595E-08 -9.2057E-10 4.5765E-11 -1.2396E-12 1.4146E-14
S4 -1.8624E-03 2.6405E-04 -7.0120E-04 2.3531E-03 -3.1396E-03 1.9228E-03 -6.7901E-04 1.2758E-04 -1.0169E-05
S5 -1.7308E-02 -4.4768E-03 7.0929E-03 -1.5510E-02 1.9545E-02 -1.4689E-02 6.5133E-03 -1.5667E-03 1.5615E-04
S6 -1.1788E-02 5.1608E-03 -1.8131E-02 3.4451E-02 -3.8982E-02 2.7613E-02 -1.1745E-02 2.7545E-03 -2.7231E-04
S7 -2.9382E-02 7.8890E-03 -5.5425E-02 9.2159E-02 -6.7785E-02 -4.5130E-02 1.2399E-01 -8.8066E-02 2.2541E-02
S8 -2.7768E-02 -3.9692E-03 -3.4127E-03 -3.3255E-03 1.2171E-02 -1.8032E-02 1.3496E-02 -5.2014E-03 8.4803E-04
S9 -3.0220E-02 3.6732E-03 -1.0260E-01 2.4397E-01 -3.0467E-01 2.1850E-01 -9.1152E-02 2.0488E-02 -1.9042E-03
S10 6.4405E-03 -1.7909E-01 2.2671E-01 -1.6677E-01 6.5919E-02 -8.9837E-03 -2.0589E-03 8.1997E-04 -7.5864E-05
S11 7.3303E-02 -2.0070E-01 1.7947E-01 -1.1482E-01 4.4955E-02 -9.6694E-03 9.8567E-04 -1.8780E-05 -2.7555E-06
S12 -1.4592E-02 -1.1532E-02 -1.6129E-03 2.6946E-03 -1.1628E-03 2.8631E-04 -3.8443E-05 2.3478E-06 -3.3720E-08
S13 -2.4437E-01 8.8671E-02 -1.9289E-02 3.1001E-03 -3.9574E-04 3.8689E-05 -2.6088E-06 1.0441E-07 -1.8377E-09
S14 -2.1062E-01 9.3822E-02 -3.5004E-02 9.2666E-03 -1.6048E-03 1.7560E-04 -1.1640E-05 4.2557E-07 -6.5756E-09
表5
f1(mm) 4.40 f7(mm) -14.00
f2(mm) -40.75 f(mm) 4.78
f3(mm) 251.00 TTL(mm) 5.55
f4(mm) 103.52 ImgH(mm) 3.96
f5(mm) -220.29 HFOV(°) 39.5
f6(mm) -17.84    
表6
图4A示出了实施例2的光学成像系统的轴上色差曲线，其表示不同波长的光线经由系统后的会聚焦点偏离。图4B示出了实施例2的光学成像系统的象散曲线，其表示子午像面弯曲和弧矢像面弯曲。图4C示出了实施例2的光学成像系统的畸变曲线，其表示不同像高处对应的畸变大小值。图4D示出了实施例2的光学成像系统的倍率色差曲线，其表示光线经由系统后在成像面上的不同的像高的偏差。根据图4A至图4D可知，实施例2所给出的光学成像系统能够实现良好的成像品质。
实施例3
以下参照图5至图6D描述了根据本申请实施例3的光学成像系统。图5示出了根据本申请实施例3的光学成像系统的结构示意图。
如图5所示，根据本申请示例性实施方式的光学成像系统沿光轴由物侧至像侧依序包括：光阑STO、第一透镜E1、第二透镜E2、第三透镜E3、第四透镜E4、第五透镜E5、第六透镜E6、第七透镜E7、滤光片E8和成像面S17。
第一透镜E1具有正光焦度，其物侧面S1为凸面，像侧面S2为凹面。第二透镜E2具有负光焦度，其物侧面S3为凹面，像侧面S4为凸面。第三透镜E3具有正光焦度，其物侧面S5为凸面，像侧面S6为凹面。第四透镜E4具有正光焦度，其物侧面S7为凹面，像侧面S8为凸面。第五透镜E5具有正光焦度，其物侧面S9为凹面，像侧面S10为凸面。第六透镜E6具有负光焦度，其物侧面S11为凸面，像侧面S12为凹面。第七透镜E7具有负光焦度，其物侧面S13为凸面，像侧面S14为凹面。滤光片E8具有物侧面S15和像侧面S16。来自物体的光依序穿过各表面S1至S16并最终成像在成像面S17上。
表7示出了实施例3的光学成像系统的各透镜的表面类型、曲率半径、厚度、材料及圆锥系数，其中，曲率半径和厚度的单位均为毫米(mm)。表8示出了可用于实施例3中各非球面镜面的高次项系数，其中，各非球面面型可由上述实施例1中给出的公式(1)限定。表9给出实施例3中各透镜的有效焦距f1至f7、光学成像系统的总有效焦距f、第一透镜E1的物侧面S1至成像面S17在光轴上的距离TTL、成像面S17上有效像素区域对角线长的一半ImgH以及光学成像系统的最大半视场角HFOV。
Figure PCTCN2019081361-appb-000004
Figure PCTCN2019081361-appb-000005
表7
面号 A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 1.1024E-04 -5.7206E-04 6.2639E-04 -4.0753E-04 1.6023E-04 -3.9275E-05 5.8438E-06 -4.8522E-07 1.7183E-08
S2 -1.1654E-03 7.5964E-06 -9.9808E-06 2.4328E-05 -9.5654E-06 1.8019E-06 -1.8026E-07 8.5495E-09 -1.0879E-10
S3 0.0000E+00 -1.2586E-226 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S4 -2.0789E-03 3.1138E-04 -8.7362E-04 3.0974E-03 -4.3661E-03 2.8251E-03 -1.0540E-03 2.0922E-04 -1.7619E-05
S5 -1.9735E-02 -5.4505E-03 9.2209E-03 -2.1531E-02 2.8971E-02 -2.3250E-02 1.1008E-02 -2.8273E-03 3.0090E-04
S6 -8.0844E-03 2.9309E-03 -8.5272E-03 1.3418E-02 -1.2573E-02 7.3753E-03 -2.5979E-03 5.0455E-04 -4.1307E-05
S7 -3.0076E-02 8.1703E-03 -5.8076E-02 9.7701E-02 -7.2706E-02 -4.8975E-02 1.3614E-01 -9.7828E-02 2.5334E-02
S8 -3.0162E-02 -4.4933E-03 -4.0264E-03 -4.0891E-03 1.5598E-02 -2.4084E-02 1.8787E-02 -7.5460E-03 1.2822E-03
S9 -2.7119E-02 3.1225E-03 -8.2623E-02 1.8611E-01 -2.2017E-01 1.4957E-01 -5.9109E-02 1.2586E-02 -1.1081E-03
S10 6.5211E-03 -1.8246E-01 2.3242E-01 -1.7204E-01 6.8423E-02 -9.3831E-03 -2.1638E-03 8.6713E-04 -8.0728E-05
S11 7.4237E-02 -2.0455E-01 1.8407E-01 -1.1851E-01 4.6695E-02 -1.0107E-02 1.0369E-03 -1.9881E-05 -2.9355E-06
S12 -1.4444E-02 -1.1357E-02 -1.5804E-03 2.6270E-03 -1.1279E-03 2.7630E-04 -3.6911E-05 2.2428E-06 -3.2049E-08
S13 -2.3677E-01 8.4569E-02 -1.8109E-02 2.8648E-03 -3.5998E-04 3.4642E-05 -2.2993E-06 9.0584E-08 -1.5693E-09
S14 -1.9798E-01 8.5502E-02 -3.0928E-02 7.9380E-03 -1.3328E-03 1.4139E-04 -9.0869E-06 3.2211E-07 -4.8252E-09
表8
f1(mm) 4.28 f7(mm) -13.53
f2(mm) -26.20 f(mm) 4.74
f3(mm) 251.00 TTL(mm) 5.55
f4(mm) 43.30 ImgH(mm) 3.96
f5(mm) 603.00 HFOV(°) 39.7
f6(mm) -15.20    
表9
图6A示出了实施例3的光学成像系统的轴上色差曲线，其表示不同波长的光线经由系统后的会聚焦点偏离。图6B示出了实施例3的光学成像系统的象散曲线，其表示子午像面弯曲和弧矢像面弯曲。图6C示出了实施例3的光学成像系统的畸变曲线，其表示不同像高处对应的畸变大小值。图6D示出 了实施例3的光学成像系统的倍率色差曲线，其表示光线经由系统后在成像面上的不同的像高的偏差。根据图6A至图6D可知，实施例3所给出的光学成像系统能够实现良好的成像品质。
实施例4
以下参照图7至图8D描述了根据本申请实施例4的光学成像系统。图7示出了根据本申请实施例4的光学成像系统的结构示意图。
如图7所示，根据本申请示例性实施方式的光学成像系统沿光轴由物侧至像侧依序包括：光阑STO、第一透镜E1、第二透镜E2、第三透镜E3、第四透镜E4、第五透镜E5、第六透镜E6、第七透镜E7、滤光片E8和成像面S17。
第一透镜E1具有正光焦度，其物侧面S1为凸面，像侧面S2为凹面。第二透镜E2具有负光焦度，其物侧面S3为凹面，像侧面S4为凸面。第三透镜E3具有正光焦度，其物侧面S5为凸面，像侧面S6为凹面。第四透镜E4具有正光焦度，其物侧面S7为凹面，像侧面S8为凸面。第五透镜E5具有正光焦度，其物侧面S9为凹面，像侧面S10为凸面。第六透镜E6具有正光焦度，其物侧面S11为凸面，像侧面S12为凹面。第七透镜E7具有负光焦度，其物侧面S13为凸面，像侧面S14为凹面。滤光片E8具有物侧面S15和像侧面S16。来自物体的光依序穿过各表面S1至S16并最终成像在成像面S17上。
表10示出了实施例4的光学成像系统的各透镜的表面类型、曲率半径、厚度、材料及圆锥系数，其中，曲率半径和厚度的单位均为毫米(mm)。表11示出了可用于实施例4中各非球面镜面的高次项系数，其中，各非球面面型可由上述实施例1中给出的公式(1)限定。表12给出实施例4中各透镜的有效焦距f1至f7、光学成像系统的总有效焦距f、第一透镜E1的物侧面S1至成像面S17在光轴上的距离TTL、成像面S17上有效像素区域对角线长的一半ImgH以及光学成像系统的最大半视场角HFOV。
Figure PCTCN2019081361-appb-000006
表10
面号 A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 8.6504E-05 -3.9765E-04 3.8571E-04 -2.2229E-04 7.7422E-05 -1.6811E-05 2.2157E-06 -1.6297E-07 5.1125E-09
S2 -1.0878E-03 6.8509E-06 -8.6966E-06 2.0480E-05 -7.7800E-06 1.4160E-06 -1.3686E-07 6.2713E-09 -7.7100E-11
S3 0.0000E+00 -1.6712E-226 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S4 -1.7191E-03 2.3415E-04 -5.9739E-04 1.9260E-03 -2.4689E-03 1.4527E-03 -4.9285E-04 8.8967E-05 -6.8129E-06
S5 -2.4911E-02 -7.7298E-03 1.4692E-02 -3.8542E-02 5.8267E-02 -5.2537E-02 2.7946E-02 -8.0642E-03 9.6426E-04
S6 -1.2086E-02 5.3573E-03 -1.9057E-02 3.6666E-02 -4.2007E-02 3.0129E-02 -1.2976E-02 3.0813E-03 -3.0844E-04
S7 -2.6890E-02 6.9069E-03 -4.6422E-02 7.3843E-02 -5.1958E-02 -3.3093E-02 8.6981E-02 -5.9101E-02 1.4471E-02
S8 -2.6355E-02 -3.6701E-03 -3.0742E-03 -2.9184E-03 1.0406E-02 -1.5019E-02 1.0951E-02 -4.1119E-03 6.5310E-04
S9 -2.8838E-02 3.4240E-03 -9.3430E-02 2.1702E-01 -2.6475E-01 1.8547E-01 -7.5583E-02 1.6596E-02 -1.5068E-03
S10 6.4421E-03 -1.7915E-01 2.2682E-01 -1.6687E-01 6.5966E-02 -8.9913E-03 -2.0609E-03 8.2086E-04 -7.5956E-05
S11 7.6022E-02 -2.1197E-01 1.9303E-01 -1.2576E-01 5.0144E-02 -1.0984E-02 1.1402E-03 -2.2124E-05 -3.3057E-06
S12 -1.6675E-02 -1.4088E-02 -2.1064E-03 3.7621E-03 -1.7355E-03 4.5681E-04 -6.5568E-05 4.2808E-06 -6.5726E-08
S13 -2.5532E-01 9.4696E-02 -2.1056E-02 3.4591E-03 -4.5135E-04 4.5103E-05 -3.1087E-06 1.2718E-07 -2.2879E-09
S14 -2.5113E-01 1.2215E-01 -4.9764E-02 1.4385E-02 -2.7203E-03 3.2503E-04 -2.3526E-05 9.3924E-07 -1.5847E-08
表11
f1(mm) 4.35 f7(mm) -9.80
f2(mm) -27.51 f(mm) 4.84
f3(mm) 246.11 TTL(mm) 5.53
f4(mm) 201.55 ImgH(mm) 3.96
f5(mm) 155.69 HFOV(°) 39.1
f6(mm) 711.00    
表12
图8A示出了实施例4的光学成像系统的轴上色差曲线，其表示不同波长的光线经由系统后的会聚焦点偏离。图8B示出了实施例4的光学成像系统的象散曲线，其表示子午像面弯曲和弧矢像面弯曲。图8C示出了实施例4的光学成像系统的畸变曲线，其表示不同像高处对应的畸变大小值。图8D示出了实施例4的光学成像系统的倍率色差曲线，其表示光线经由系统后在成像面上的不同的像高的偏差。根据图8A至图8D可知，实施例4所给出的光学成像系统能够实现良好的成像品质。
实施例5
以下参照图9至图10D描述了根据本申请实施例5的光学成像系统。图9示出了根据本申请实施例5的光学成像系统的结构示意图。
如图9所示，根据本申请示例性实施方式的光学成像系统沿光轴由物侧至像侧依序包括：光阑STO、第一透镜E1、第二透镜E2、第三透镜E3、第四透镜E4、第五透镜E5、第六透镜E6、第七透镜E7、滤光片E8和成像面S17。
第一透镜E1具有正光焦度，其物侧面S1为凸面，像侧面S2为凹面。第二透镜E2具有负光焦度，其物侧面S3为凹面，像侧面S4为凸面。第三透镜E3具有负光焦度，其物侧面S5为凸面，像侧面S6为凹面。第四透镜E4具有正光焦度，其物侧面S7为凹面，像侧面S8为凸面。第五透镜E5具有正光焦度，其物侧面S9为凹面，像侧面S10为凸面。第六透镜E6具有正光焦度，其物侧面S11为凸面，像侧面S12为凹面。第七透镜E7具有负光焦度，其物侧面S13为凸面，像侧面S14为凹面。滤光片E8具有物侧面S15和像侧面S16。来自物体的光依序穿过各表面S1至S16并最终成像在成像面S17上。
表13示出了实施例5的光学成像系统的各透镜的表面类型、曲率半径、厚度、材料及圆锥系数，其中，曲率半径和厚度的单位均为毫米(mm)。表14示出了可用于实施例5中各非球面镜面的高次项系数，其中，各非球面面型可由上述实施例1中给出的公式(1)限定。表15给出实施例5中各透镜的有效焦距f1至f7、光学成像系统的总有效焦距f、第一透镜E1的物侧面S1至成像面S17在光轴上的距离TTL、成像面S17上有效像素区域对角线长的一半ImgH以及光学成像系统的最大半视场角HFOV。
Figure PCTCN2019081361-appb-000007
表13
面号 A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 1.4089E-04 -8.2659E-04 1.0232E-03 -7.5260E-04 3.3453E-04 -9.2702E-05 1.5594E-05 -1.4638E-06 5.8603E-08
S2 -1.0009E-03 6.0467E-06 -7.3629E-06 1.6633E-05 -6.0607E-06 1.0581E-06 -9.8097E-08 4.3120E-09 -5.0851E-11
S3 0.0000E+00 4.5658E-226 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S4 -1.8317E-03 2.5754E-04 -6.7824E-04 2.2572E-03 -2.9867E-03 1.8140E-03 -6.3527E-04 1.1837E-04 -9.3569E-06
S5 -2.7627E-02 -9.0280E-03 1.8071E-02 -4.9925E-02 7.9482E-02 -7.5472E-02 4.2279E-02 -1.2848E-02 1.6179E-03
S6 -1.2648E-02 5.7356E-03 -2.0872E-02 4.1081E-02 -4.8149E-02 3.5328E-02 -1.5565E-02 3.7812E-03 -3.8721E-04
S7 -2.6259E-02 6.6652E-03 -4.4269E-02 6.9586E-02 -4.8386E-02 -3.0454E-02 7.9099E-02 -5.3111E-02 1.2851E-02
S8 -2.8151E-02 -4.0515E-03 -3.5074E-03 -3.4413E-03 1.2682E-02 -1.8917E-02 1.4256E-02 -5.5319E-03 9.0811E-04
S9 -2.8351E-02 3.3378E-03 -9.0305E-02 2.0798E-01 -2.5158E-01 1.7475E-01 -7.0612E-02 1.5373E-02 -1.3839E-03
S10 6.6802E-03 -1.8918E-01 2.4390E-01 -1.8272E-01 7.3555E-02 -1.0209E-02 -2.3829E-03 9.6649E-04 -9.1070E-05
S11 7.7803E-02 -2.1947E-01 2.0218E-01 -1.3326E-01 5.3753E-02 -1.1911E-02 1.2509E-03 -2.4555E-05 -3.7117E-06
S12 -1.6049E-02 -1.3302E-02 -1.9511E-03 3.4186E-03 -1.5471E-03 3.9950E-04 -5.6255E-05 3.6031E-06 -5.4271E-08
S13 -2.4058E-01 8.6619E-02 -1.8696E-02 2.9815E-03 -3.7764E-04 3.6633E-05 -2.4509E-06 9.7331E-08 -1.6997E-09
S14 -2.3056E-01 1.0745E-01 -4.1945E-02 1.1618E-02 -2.1051E-03 2.4099E-04 -1.6714E-05 6.3935E-07 -1.0336E-08
表14
f1(mm) 4.29 f7(mm) -10.63
f2(mm) -30.76 f(mm) 4.83
f3(mm) -170.88 TTL(mm) 5.55
f4(mm) 303.85 ImgH(mm) 3.96
f5(mm) 603.00 HFOV(°) 39.1
f6(mm) 711.00    
表15
图10A示出了实施例5的光学成像系统的轴上色差曲线，其表示不同波长的光线经由系统后的会聚焦点偏离。图10B示出了实施例5的光学成像系统的象散曲线，其表示子午像面弯曲和弧矢像面弯曲。图10C示出了实施例5的光学成像系统的畸变曲线，其表示不同视角情况下的畸变大小值。图10D示出了实施例5的光学成像系统的倍率色差曲线，其表示光线经由系统后在成像面上的不同的像高的偏差。根据图10A至图10D可知，实施例5所给出的光学成像系统能够实现良好的成像品质。
实施例6
以下参照图11至图12D描述了根据本申请实施例6的光学成像系统。图11示出了根据本申请实施例6的光学成像系统的结构示意图。
如图11所示，根据本申请示例性实施方式的光学成像系统沿光轴由物侧至像侧依序包括：光阑STO、第一透镜E1、第二透镜E2、第三透镜E3、第四透镜E4、第五透镜E5、第六透镜E6、第七透镜E7、滤光片E8和成像面S17。
第一透镜E1具有正光焦度，其物侧面S1为凸面，像侧面S2为凹面。第二透镜E2具有负光焦度，其物侧面S3为凹面，像侧面S4为凸面。第三透镜E3具有正光焦度，其物侧面S5为凸面，像侧面S6为凹面。第四透镜E4具有正光焦度，其物侧面S7为凹面，像侧面S8为凸面。第五透镜E5具有负光焦度，其物侧面S9为凸面，像侧面S10为凹面。第六透镜E6具有正光焦度，其物侧面S11为凸面，像侧面S12为凹面。第七透镜E7具有负光焦度，其物侧面S13为凸面，像侧面S14为凹面。滤光片E8具有物侧面S15和像侧面S16。来自物体的光依序穿过各表面S1至S16并最终成像在成像面S17上。
表16示出了实施例6的光学成像系统的各透镜的表面类型、曲率半径、厚度、材料及圆锥系数，其中，曲率半径和厚度的单位均为毫米(mm)。表17示出了可用于实施例6中各非球面镜面的高次项系数，其中，各非球面面型可由上述实施例1中给出的公式(1)限定。表18给出实施例6中各透镜的有效焦距f1至f7、光学成像系统的总有效焦距f、第一透镜E1的物侧面S1至成像面S17在光轴上的距离TTL、成像面S17上有效像素区域对角线长的一半ImgH以及光学成像系统的最大半视场角HFOV。
Figure PCTCN2019081361-appb-000008
Figure PCTCN2019081361-appb-000009
表16
面号 A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 1.6394E-04 -1.0375E-03 1.3853E-03 -1.0991E-03 5.2700E-04 -1.5753E-04 2.8583E-05 -2.8943E-06 1.2499E-07
S2 1.6905E-16 -1.5297E-15 6.0490E-15 -1.2074E-14 1.2148E-14 -4.9780E-15 -7.3090E-16 1.2225E-15 -2.7282E-16
S3 0.0000E+00 -4.9588E-227 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S4 -2.4172E-04 1.2346E-05 -1.1811E-05 1.4279E-05 -6.8637E-06 1.5144E-06 -1.9266E-07 1.3041E-08 -3.7447E-10
S5 -2.2143E-02 -6.4782E-03 1.1609E-02 -2.8713E-02 4.0925E-02 -3.4791E-02 1.7448E-02 -4.7470E-03 5.3516E-04
S6 -1.4787E-02 7.2501E-03 -2.8527E-02 6.0710E-02 -7.6935E-02 6.1035E-02 -2.9076E-02 7.6372E-03 -8.4561E-04
S7 -2.2153E-02 5.1647E-03 -3.1507E-02 4.5490E-02 -2.9053E-02 -1.6796E-02 4.0068E-02 -2.4711E-02 5.4920E-03
S8 -2.0362E-02 -2.4924E-03 -1.8351E-03 -1.5313E-03 4.7992E-03 -6.0887E-03 3.9023E-03 -1.2879E-03 1.7980E-04
S9 -3.1346E-02 3.8804E-03 -1.1039E-01 2.6733E-01 -3.4002E-01 2.4835E-01 -1.0552E-01 2.4155E-02 -2.2865E-03
S10 4.1307E-03 -9.1984E-02 9.3256E-02 -5.4938E-02 1.7390E-02 -1.8980E-03 -3.4836E-04 1.1111E-04 -8.2326E-06
S11 5.1501E-02 -1.1819E-01 8.8588E-02 -4.7507E-02 1.5591E-02 -2.8108E-03 2.4016E-04 -3.8356E-06 -4.7170E-07
S12 -1.2633E-02 -9.2898E-03 -1.2090E-03 1.8794E-03 -7.5463E-04 1.7289E-04 -2.1599E-05 1.2274E-06 -1.6403E-08
S13 -1.5475E-01 4.4683E-02 -7.7350E-03 9.8925E-04 -1.0049E-04 7.8180E-06 -4.1950E-07 1.3361E-08 -1.8712E-10
S14 -1.2590E-01 4.3360E-02 -1.2507E-02 2.5599E-03 -3.4275E-04 2.8997E-05 -1.4861E-06 4.2007E-08 -5.0181E-10
表17
f1(mm) 4.67 f7(mm) -6.28
f2(mm) -74.13 f(mm) 4.79
f3(mm) 251.00 TTL(mm) 5.55
f4(mm) 182.87 ImgH(mm) 3.96
f5(mm) -165.26 HFOV(°) 39.4
f6(mm) 710.98    
表18
图12A示出了实施例6的光学成像系统的轴上色差曲线，其表示不同波长的光线经由系统后的会聚焦点偏离。图12B示出了实施例6的光学成像系统的象散曲线，其表示子午像面弯曲和弧矢像面弯曲。图12C示出了实施例6的光学成像系统的畸变曲线，其表示不同像高处对应的畸变大小值。图12D示出了实施例6的光学成像系统的倍率色差曲线，其表示光线经由系统后在成像面上的不同的像高的偏差。根据图12A至图12D可知，实施例6所给出的光学成像系统能够实现良好的成像品质。
实施例7
以下参照图13至图14D描述了根据本申请实施例7的光学成像系统。图13示出了根据本申请实施例7的光学成像系统的结构示意图。
如图13所示，根据本申请示例性实施方式的光学成像系统沿光轴由物侧至像侧依序包括：光阑STO、第一透镜E1、第二透镜E2、第三透镜E3、第四透镜E4、第五透镜E5、第六透镜E6、第七透镜E7、滤光片E8和成像面S17。
第一透镜E1具有正光焦度，其物侧面S1为凸面，像侧面S2为凹面。第二透镜E2具有负光焦度，其物侧面S3为凹面，像侧面S4为凸面。第三透镜E3具有负光焦度，其物侧面S5为凸面，像侧面S6为凹面。第四透镜E4具有正光焦度，其物侧面S7为凹面，像侧面S8为凸面。第五透镜E5具有负光焦度，其物侧面S9为凹面，像侧面S10为凸面。第六透镜E6具有正光焦度，其物侧面S11为凸面，像侧面S12为凹面。第七透镜E7具有负光焦度，其物侧面S13为凸面，像侧面S14为凹面。滤光片E8具有物侧面S15和像侧面S16。来自物体的光依序穿过各表面S1至S16并最终成像在成像面S17上。
表19示出了实施例7的光学成像系统的各透镜的表面类型、曲率半径、厚度、材料及圆锥系数，其中，曲率半径和厚度的单位均为毫米(mm)。表20示出了可用于实施例7中各非球面镜面的高次项系数，其中，各非球面面型可由上述实施例1中给出的公式(1)限定。表21给出实施例7中各透镜的有效焦距f1至f7、光学成像系统的总有效焦距f、第一透镜E1的物侧面S1至成像面S17在光轴上的距离TTL、成像面S17上有效像素区域对角线长的一半ImgH以及光学成像系统的最大半视场角HFOV。
Figure PCTCN2019081361-appb-000010
表19
面号 A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 4.3845E-13 4.7695E-15 -3.3248E-14 9.0904E-14 -1.3346E-13 1.1476E-13 -5.8031E-14 1.6000E-14 -1.8566E-15
S2 -1.4683E-16 4.1693E-15 -3.1166E-14 1.0291E-13 -1.8224E-13 1.8608E-13 -1.0990E-13 3.4909E-14 -4.6178E-15
S3 0.0000E+00 -3.0524E-225 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S4 -2.3843E-03 3.8246E-04 -1.1492E-03 4.3633E-03 -6.5869E-03 4.5644E-03 -1.8237E-03 3.8770E-04 -3.4965E-05
S5 -2.8924E-02 -9.6711E-03 1.9807E-02 -5.5991E-02 9.1209E-02 -8.8617E-02 5.0794E-02 -1.5794E-02 2.0350E-03
S6 -1.5349E-02 7.6677E-03 -3.0739E-02 6.6649E-02 -8.6053E-02 6.9555E-02 -3.3759E-02 9.0343E-03 -1.0192E-03
S7 -1.8454E-02 3.9269E-03 -2.1865E-02 2.8812E-02 -1.6795E-02 -8.8619E-03 1.9296E-02 -1.0861E-02 2.2032E-03
S8 -2.8046E-02 -4.0288E-03 -3.4813E-03 -3.4092E-03 1.2540E-02 -1.8671E-02 1.4044E-02 -5.4395E-03 8.9125E-04
S9 -3.1756E-02 3.9567E-03 -1.1330E-01 2.7616E-01 -3.5353E-01 2.5990E-01 -1.1114E-01 2.5609E-02 -2.4399E-03
S10 6.4070E-03 -1.7769E-01 2.2436E-01 -1.6461E-01 6.4894E-02 -8.8210E-03 -2.0163E-03 8.0092E-04 -7.3909E-05
S11 6.5105E-02 -1.6799E-01 1.4157E-01 -8.5358E-02 3.1495E-02 -6.3842E-03 6.1332E-04 -1.1013E-05 -1.5228E-06
S12 -1.3585E-02 -1.0360E-02 -1.3981E-03 2.2538E-03 -9.3844E-04 2.2295E-04 -2.8885E-05 1.7022E-06 -2.3589E-08
S13 -1.5961E-01 4.6806E-02 -8.2289E-03 1.0688E-03 -1.1027E-04 8.7123E-06 -4.7478E-07 1.5357E-08 -2.1844E-10
S14 -1.1845E-01 3.9570E-02 -1.1071E-02 2.1980E-03 -2.8546E-04 2.3424E-05 -1.1644E-06 3.1927E-08 -3.6995E-10
表20
f1(mm) 4.43 f7(mm) -12.18
f2(mm) -97.63 f(mm) 4.62
f3(mm) -800.00 TTL(mm) 5.55
f4(mm) 71.80 ImgH(mm) 3.96
f5(mm) -20.84 HFOV(°) 40.3
f6(mm) 711.00    
表21
图14A示出了实施例7的光学成像系统的轴上色差曲线，其表示不同波长的光线经由系统后的会聚焦点偏离。图14B示出了实施例7的光学成像系统的象散曲线，其表示子午像面弯曲和弧矢像面弯曲。图14C示出了实施例7的光学成像系统的畸变曲线，其表示不同像高处对应的畸变大小值。图14D示出了实施例7的光学成像系统的倍率色差曲线，其表示光线经由系统后在成像面上的不同的像高的偏差。根据图14A至图14D可知，实施例7所给出的光学成像系统能够实现良好的成像品质。
实施例8
以下参照图15至图16D描述了根据本申请实施例8的光学成像系统。图15示出了根据本申请实施例8的光学成像系统的结构示意图。
如图15所示，根据本申请示例性实施方式的光学成像系统沿光轴由物侧至像侧依序包括：光阑STO、第一透镜E1、第二透镜E2、第三透镜E3、第四透镜E4、第五透镜E5、第六透镜E6、第七透镜E7、滤光片E8和成像面S17。
第一透镜E1具有正光焦度，其物侧面S1为凸面，像侧面S2为凹面。第二透镜E2具有负光焦度，其物侧面S3为凹面，像侧面S4为凸面。第三透镜E3具有负光焦度，其物侧面S5为凹面，像侧面S6为凹面。第四透镜E4具有正光焦度，其物侧面S7为凹面，像侧面S8为凸面。第五透镜E5具有负光焦度，其物侧面S9为凹面，像侧面S10为凸面。第六透镜E6具有正光焦度，其物侧面S11为凸面，像侧面S12为凹面。第七透镜E7具有负光焦度，其物侧面S13为凸面，像侧面S14为凹面。滤光片E8具有物侧面S15和像侧面S16。来自物体的光依序穿过各表面S1至S16并最终成像在成像面S17上。
表22示出了实施例8的光学成像系统的各透镜的表面类型、曲率半径、厚度、材料及圆锥系数，其中，曲率半径和厚度的单位均为毫米(mm)。表23示出了可用于实施例8中各非球面镜面的高次项系数，其中，各非球面面型可由上述实施例1中给出的公式(1)限定。表24给出实施例8中各透镜的有效焦距f1至f7、光学成像系统的总有效焦距f、第一透镜E1的物侧面S1至成像面S17在光轴上的距离TTL、成像面S17上有效像素区域对角线长的一半ImgH以及光学成像系统的最大半视场角HFOV。
Figure PCTCN2019081361-appb-000011
Figure PCTCN2019081361-appb-000012
表22
面号 A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 -8.2699E-17 -2.3730E-15 1.8465E-14 -5.4063E-14 8.2695E-14 -7.2615E-14 3.6946E-14 -1.0145E-14 1.1643E-15
S2 2.0720E-15 -2.4688E-14 1.1888E-13 -3.0551E-13 4.6256E-13 -4.2589E-13 2.3440E-13 -7.0882E-14 9.0582E-15
S3 0.0000E+00 -7.5150E-226 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S4 -3.2756E-03 6.1588E-04 -2.1690E-03 9.6532E-03 -1.7081E-02 1.3873E-02 -6.4971E-03 1.6190E-03 -1.7113E-04
S5 -3.0348E-02 -1.0394E-02 2.1806E-02 -6.3141E-02 1.0536E-01 -1.0485E-01 6.1562E-02 -1.9608E-02 2.5878E-03
S6 -1.9050E-02 1.0601E-02 -4.7347E-02 1.1436E-01 -1.6450E-01 1.4812E-01 -8.0092E-02 2.3878E-02 -3.0008E-03
S7 -5.8151E-14 9.5564E-13 -6.0880E-12 2.0354E-11 -3.9756E-11 4.6978E-11 -3.3063E-11 1.2753E-11 -2.0749E-12
S8 -2.2304E-02 -2.8572E-03 -2.2017E-03 -1.9228E-03 6.3071E-03 -8.3745E-03 5.6175E-03 -1.9403E-03 2.8351E-04
S9 -3.5208E-02 4.6191E-03 -1.3927E-01 3.5743E-01 -4.8181E-01 3.7296E-01 -1.6794E-01 4.0744E-02 -4.0874E-03
S10 6.3078E-03 -1.7358E-01 2.1746E-01 -1.5831E-01 6.1926E-02 -8.3522E-03 -1.8943E-03 7.4662E-04 -6.8362E-05
S11 6.6722E-02 -1.7429E-01 1.4869E-01 -9.0758E-02 3.3901E-02 -6.9567E-03 6.7656E-04 -1.2299E-05 -1.7215E-06
S12 -1.4726E-02 -1.1691E-02 -1.6426E-03 2.7569E-03 -1.1951E-03 2.9561E-04 -3.9873E-05 2.4463E-06 -3.5295E-08
S13 -1.5313E-01 4.3986E-02 -7.5747E-03 9.6369E-04 -9.7385E-05 7.5367E-06 -4.0229E-07 1.2746E-08 -1.7758E-10
S14 -1.1052E-01 3.5663E-02 -9.6385E-03 1.8484E-03 -2.3188E-04 1.8380E-05 -8.8255E-07 2.3374E-08 -2.6162E-10
表23
f1(mm) 4.34 f7(mm) -17.67
f2(mm) -1000.00 f(mm) 4.49
f3(mm) -191.67 TTL(mm) 5.55
f4(mm) 55.49 ImgH(mm) 3.96
f5(mm) -16.36 HFOV(°) 41.0
f6(mm) 711.00    
表24
图16A示出了实施例8的光学成像系统的轴上色差曲线，其表示不同波长的光线经由系统后的会聚焦点偏离。图16B示出了实施例8的光学成像系统的象散曲线，其表示子午像面弯曲和弧矢像面弯曲。图16C示出了实施例8的光学成像系统的畸变曲线，其表示不同像高处对应的畸变大小值。图16D示出了实施例8的光学成像系统的倍率色差曲线，其表示光线经由系统后在成像面上的不同的像高的偏差。根据图16A至图16D可知，实施例8所给出的光学成像系统能够实现良好的成像品质。
实施例9
以下参照图17至图18D描述了根据本申请实施例9的光学成像系统。图17示出了根据本申请实施例9的光学成像系统的结构示意图。
如图17所示，根据本申请示例性实施方式的光学成像系统沿光轴由物侧至像侧依序包括：光阑STO、第一透镜E1、第二透镜E2、第三透镜E3、第四透镜E4、第五透镜E5、第六透镜E6、第七透镜E7、滤光片E8和成像面S17。
第一透镜E1具有正光焦度，其物侧面S1为凸面，像侧面S2为凹面。第二透镜E2具有负光焦度，其物侧面S3为凹面，像侧面S4为凸面。第三透镜E3具有正光焦度，其物侧面S5为凹面，像侧面S6为凸面。第四透镜E4具有正光焦度，其物侧面S7为凹面，像侧面S8为凸面。第五透镜E5具有负光焦度，其物侧面S9为凹面，像侧面S10为凸面。第六透镜E6具有正光焦度，其物侧面S11为凸面，像侧面S12为凹面。第七透镜E7具有负光焦度，其物侧面S13为凸面，像侧面S14为凹面。滤光片E8具有物侧面S15和像侧面S16。来自物体的光依序穿过各表面S1至S16并最终成像在成像面S17上。
表25示出了实施例9的光学成像系统的各透镜的表面类型、曲率半径、厚度、材料及圆锥系数，其中，曲率半径和厚度的单位均为毫米(mm)。表26示出了可用于实施例9中各非球面镜面的高次项系数，其中，各非球面面型可由上述实施例1中给出的公式(1)限定。表27给出实施例9中各透镜的有效焦距f1至f7、光学成像系统的总有效焦距f、第一透镜E1的物侧面S1至成像面S17在光轴上的距离TTL、成像面S17上有效像素区域对角线长的一半ImgH以及光学成像系统的最大半视场角HFOV。
Figure PCTCN2019081361-appb-000013
面号 A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 4.6939E-15 -5.3464E-14 2.3407E-13 -5.3422E-13 7.0981E-13 -5.6983E-13 2.7250E-13 -7.1477E-14 7.9168E-15
S2 -8.5454E-16 1.2468E-14 -7.1996E-14 2.1035E-13 -3.4728E-13 3.3899E-13 -1.9415E-13 6.0338E-14 -7.8569E-15
S3 0.0000E+00 1.8495E-225 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S4 -3.2650E-03 6.1290E-04 -2.1550E-03 9.5752E-03 -1.6916E-02 1.3717E-02 -6.4134E-03 1.5955E-03 -1.6838E-04
S5 -2.9704E-02 -1.0065E-02 2.0890E-02 -5.9841E-02 9.8785E-02 -9.7263E-02 5.6496E-02 -1.7802E-02 2.3244E-03
S6 -2.0694E-02 1.2004E-02 -5.5875E-02 1.4067E-01 -2.1089E-01 1.9792E-01 -1.1154E-01 3.4660E-02 -4.5399E-03
S7 -3.0672E-14 3.0830E-13 -1.2836E-12 2.9849E-12 -4.3688E-12 4.2054E-12 -2.6070E-12 9.3965E-13 -1.4809E-13
S8 -2.1772E-02 -2.7556E-03 -2.0979E-03 -1.8102E-03 5.8665E-03 -7.6960E-03 5.1004E-03 -1.7405E-03 2.5127E-04
S9 -3.4786E-02 4.5365E-03 -1.3595E-01 3.4683E-01 -4.6471E-01 3.5757E-01 -1.6004E-01 3.8595E-02 -3.8486E-03
S10 6.1751E-03 -1.6813E-01 2.0841E-01 -1.5012E-01 5.8099E-02 -7.7530E-03 -1.7399E-03 6.7847E-04 -6.1466E-05
S11 6.5547E-02 -1.6971E-01 1.4350E-01 -8.6815E-02 3.2141E-02 -6.5373E-03 6.3015E-04 -1.1354E-05 -1.5752E-06
S12 -1.4416E-02 -1.1324E-02 -1.5743E-03 2.6144E-03 -1.1214E-03 2.7444E-04 -3.6627E-05 2.2234E-06 -3.1741E-08
S13 -1.5911E-01 4.6588E-02 -8.1779E-03 1.0605E-03 -1.0924E-04 8.6180E-06 -4.6891E-07 1.5144E-08 -2.1507E-10
S14 -1.1924E-01 3.9964E-02 -1.1219E-02 2.2346E-03 -2.9117E-04 2.3972E-05 -1.1956E-06 3.2890E-08 -3.8237E-10
表26
f1(mm) 4.37 f7(mm) -14.64
f2(mm) -1000.00 f(mm) 4.52
f3(mm) 706.00 TTL(mm) 5.55
f4(mm) 61.09 ImgH(mm) 3.96
f5(mm) -16.32 HFOV(°) 40.8
f6(mm) 711.00    
表27
图18A示出了实施例9的光学成像系统的轴上色差曲线，其表示不同波长的光线经由系统后的会聚焦点偏离。图18B示出了实施例9的光学成像系统的象散曲线，其表示子午像面弯曲和弧矢像面弯曲。图18C示出了实施例9的光学成像系统的畸变曲线，其表示不同像高处对应的畸变大小值。图18D示出了实施例9的光学成像系统的倍率色差曲线，其表示光线经由系统后在成像面上的不同的像高的偏差。根据图18A至图18D可知，实施例9所给出的光学成像系统能够实现良好的成像品质。
实施例10
以下参照图19至图20D描述了根据本申请实施例10的光学成像系统。图19示出了根据本申请实施例10的光学成像系统的结构示意图。
如图19所示，根据本申请示例性实施方式的光学成像系统沿光轴由物侧至像侧依序包括：光阑STO、第一透镜E1、第二透镜E2、第三透镜E3、第四透镜E4、第五透镜E5、第六透镜E6、第七透镜E7、滤光片E8和成像面S17。
第一透镜E1具有正光焦度，其物侧面S1为凸面，像侧面S2为凹面。第二透镜E2具有负光焦度，其物侧面S3为凹面，像侧面S4为凸面。第三透镜E3具有负光焦度，其物侧面S5为凸面，像侧面S6为凹面。第四透镜E4具有正光焦度，其物侧面S7为凹面，像侧面S8为凸面。第五透镜E5具有负光焦度，其物侧面S9为凹面，像侧面S10为凸面。第六透镜E6具有负光焦度，其物侧面S11为凸面，像侧面S12为凹面。第七透镜E7具有负光焦度，其物侧面S13为凸面，像侧面S14为凹面。滤光片E8具有物侧面S15和像侧面S16。来自物体的光依序穿过各表面S1至S16并最终成像在成像面S17上。
表28示出了实施例10的光学成像系统的各透镜的表面类型、曲率半径、厚度、材料及圆锥系数，其中，曲率半径和厚度的单位均为毫米(mm)。表29示出了可用于实施例10中各非球面镜面的高次 项系数，其中，各非球面面型可由上述实施例1中给出的公式(1)限定。表30给出实施例10中各透镜的有效焦距f1至f7、光学成像系统的总有效焦距f、第一透镜E1的物侧面S1至成像面S17在光轴上的距离TTL、成像面S17上有效像素区域对角线长的一半ImgH以及光学成像系统的最大半视场角HFOV。
Figure PCTCN2019081361-appb-000014
表28
面号 A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 9.8884E-04 -1.5369E-02 5.0401E-02 -9.8207E-02 1.1565E-01 -8.4899E-02 3.7834E-02 -9.4086E-03 9.9788E-04
S2 -1.8075E-02 4.6402E-04 -2.4011E-03 2.3049E-02 -3.5691E-02 2.6479E-02 -1.0432E-02 1.9486E-03 -9.7653E-05
S3 -8.6467E-03 3.3842E-04 1.7016E-02 -2.4636E-02 3.0880E-02 -2.8864E-02 1.6894E-02 -5.3875E-03 7.2382E-04
S4 -2.7162E-03 4.6506E-04 -1.4914E-03 6.0444E-03 -9.7393E-03 7.2034E-03 -3.0719E-03 6.9704E-04 -6.7097E-05
S5 -3.5515E-02 -1.3159E-02 2.9864E-02 -9.3545E-02 1.6886E-01 -1.8179E-01 1.1546E-01 -3.9784E-02 5.6801E-03
S6 -2.3844E-02 1.4845E-02 -7.4175E-02 2.0045E-01 -3.2257E-01 3.2496E-01 -1.9658E-01 6.5565E-02 -9.2185E-03
S7 -1.8799E-02 4.0375E-03 -2.2690E-02 3.0178E-02 -1.7755E-02 -9.4554E-03 2.0780E-02 -1.1806E-02 2.4170E-03
S8 -2.1983E-02 -2.7958E-03 -2.1388E-03 -1.8544E-03 6.0388E-03 -7.9603E-03 5.3011E-03 -1.8178E-03 2.6369E-04
S9 -3.1769E-02 3.9592E-03 -1.1339E-01 2.7645E-01 -3.5397E-01 2.6028E-01 -1.1133E-01 2.5657E-02 -2.4450E-03
S10 7.0311E-03 -2.0428E-01 2.7020E-01 -2.0767E-01 8.5766E-02 -1.2213E-02 -2.9244E-03 1.2169E-03 -1.1764E-04
S11 8.0641E-02 -2.3158E-01 2.1720E-01 -1.4575E-01 5.9853E-02 -1.3503E-02 1.4437E-03 -2.8851E-05 -4.4399E-06
S12 -1.8237E-02 -1.6112E-02 -2.5193E-03 4.7054E-03 -2.2700E-03 6.2484E-04 -9.3791E-05 6.4036E-06 -1.0282E-07
S13 -2.9861E-01 1.1978E-01 -2.8803E-02 5.1171E-03 -7.2210E-04 7.8037E-05 -5.8168E-06 2.5735E-07 -5.0069E-09
S14 -2.5225E-01 1.2297E-01 -5.0208E-02 1.4546E-02 -2.7568E-03 3.3012E-04 -2.3948E-05 9.5820E-07 -1.6203E-08
表29
f1(mm) 4.04 f7(mm) -10.36
f2(mm) -1114.41 f(mm) 4.95
f3(mm) -11.76 TTL(mm) 5.55
f4(mm) 31.18 ImgH(mm) 3.96
f5(mm) -4025.15 HFOV(°) 38.6
f6(mm) -57.87    
表30
图20A示出了实施例10的光学成像系统的轴上色差曲线，其表示不同波长的光线经由系统后的会聚焦点偏离。图20B示出了实施例10的光学成像系统的象散曲线，其表示子午像面弯曲和弧矢像面弯曲。图20C示出了实施例10的光学成像系统的畸变曲线，其表示不同像高处对应的畸变大小值。图20D示出了实施例10的光学成像系统的倍率色差曲线，其表示光线经由系统后在成像面上的不同的像高的偏差。根据图20A至图20D可知，实施例10所给出的光学成像系统能够实现良好的成像品质。
综上，实施例1至实施例10分别满足表31中所示的关系。
条件式/实施例 1 2 3 4 5 6 7 8 9 10
f*tan(HFOV)(mm) 3.94 3.94 3.94 3.93 3.93 3.93 3.92 3.90 3.91 3.95
f/f1 1.20 1.09 1.11 1.11 1.13 1.02 1.04 1.03 1.03 1.22
f/f7 -0.45 -0.34 -0.35 -0.49 -0.45 -0.76 -0.38 -0.25 -0.31 -0.48
R2/(R1*2) 2.25 1.77 1.98 1.81 1.86 1.49 1.69 1.73 1.71 2.48
(R13+R14)/(R11+R12) 0.38 0.65 0.66 0.55 0.60 0.73 0.59 0.72 0.71 0.44
CT1/(CT2+CT3+CT4) 0.77 0.80 0.87 0.90 0.99 0.79 0.96 0.95 1.03 0.73
T23/CT3 0.21 0.34 0.30 0.37 0.33 0.11 0.33 0.46 0.59 0.11
f34/f56 0.77 -4.62 -2.47 0.91 -1.21 -0.53 -3.87 -4.82 -3.53 0.34
∑CT/TTL 0.58 0.60 0.61 0.54 0.55 0.58 0.60 0.61 0.62 0.57
f/EPD 1.77 1.72 1.70 1.73 1.73 1.70 1.65 1.60 1.61 1.76
表31
本申请还提供一种成像装置，其电子感光元件可以是感光耦合元件(CCD)或互补性氧化金属半导体元件(CMOS)。成像装置可以是诸如数码相机的独立成像设备，也可以是集成在诸如手机等移动电子设备上的成像模块。该成像装置装配有以上描述的光学成像系统。
以上描述仅为本申请的较佳实施例以及对所运用技术原理的说明。本领域技术人员应当理解，本申请中所涉及的发明范围，并不限于上述技术特征的特定组合而成的技术方案，同时也应涵盖在不脱离所述发明构思的情况下，由上述技术特征或其等同特征进行任意组合而形成的其它技术方案。例如上述特征与本申请中公开的(但不限于)具有类似功能的技术特征进行互相替换而形成的技术方案。

Claims (20)

  1. 光学成像系统，沿着光轴由物侧至像侧依序包括：第一透镜、第二透镜、第三透镜、第四透镜、第五透镜、第六透镜和第七透镜，
    其特征在于，
    所述第一透镜具有正光焦度；
    所述第二透镜具有负光焦度，其物侧面为凹面，像侧面为凸面；
    所述第三透镜具有光焦度；
    所述第四透镜具有正光焦度，其物侧面为凹面，像侧面为凸面；
    所述第五透镜具有光焦度；
    所述第六透镜具有光焦度；
    所述第七透镜具有负光焦度，其物侧面为凸面；以及
    所述光学成像系统的总有效焦距f与所述光学成像系统的入瞳直径EPD满足f/EPD≤1.8。
  2. 根据权利要求1所述的光学成像系统，其特征在于，所述光学成像系统的总有效焦距f与所述第一透镜的有效焦距f1满足1≤f/f1＜1.5。
  3. 根据权利要求1所述的光学成像系统，其特征在于，所述光学成像系统的总有效焦距f与所述第七透镜的有效焦距f7满足-1＜f/f7＜0。
  4. 根据权利要求2所述的光学成像系统，其特征在于，所述第一透镜像侧面的曲率半径R2与所述第一透镜物侧面的曲率半径R1满足1＜R2/(R1*2)≤2.5。
  5. 根据权利要求1所述的光学成像系统，其特征在于，所述第七透镜的物侧面的曲率半径R13、所述第七透镜的像侧面的曲率半径R14、所述第六透镜的物侧面的曲率半径R11与所述第六透镜的像侧面的曲率半径R12满足0.3＜(R13+R14)/(R11+R12)＜1。
  6. 根据权利要求1所述的光学成像系统，其特征在于，所述第一透镜在所述光轴上的中心厚度CT1、所述第二透镜在所述光轴上的中心厚度CT2、所述第三透镜在所述光轴上的中心厚度CT3与所述第四透镜在所述光轴上的中心厚度CT4满足0.7≤CT1/(CT2+CT3+CT4)＜1.1。
  7. 根据权利要求1所述的光学成像系统，其特征在于，所述第二透镜和所述第三透镜在所述光轴上的间隔距离T23与所述第三透镜在所述光轴上的中心厚度CT3满足0.1≤T23/CT3＜0.8。
  8. 根据权利要求1所述的光学成像系统，其特征在于，所述第三透镜和所述第四透镜的组合焦距f34与所述第五透镜和所述第六透镜的组合焦距f56满足-5＜f34/f56＜1。
  9. 根据权利要求1至8中任一项所述的光学成像系统，其特征在于，所述第一透镜至所述第七透镜分别于所述光轴上的中心厚度的总和∑CT与所述第一透镜的物侧面至所述光学成像系统的成像面在所述光轴上的距离TTL满足0.5≤∑CT/TTL≤0.7。
  10. 根据权利要求1至8中任一项所述的光学成像系统，其特征在于，所述光学成像系统的总有效焦距f与所述光学成像系统的最大半视场角HFOV满足3.9mm≤f*TAN(HFOV)＜4.5mm。
  11. 光学成像系统，沿着光轴由物侧至像侧依序包括：第一透镜、第二透镜、第三透镜、第四透镜、第五透镜、第六透镜和第七透镜，
    其特征在于，
    所述第一透镜具有正光焦度；
    所述第二透镜具有负光焦度，其物侧面为凹面，像侧面为凸面；
    所述第三透镜具有光焦度；
    所述第四透镜具有正光焦度，其物侧面为凹面，像侧面为凸面；
    所述第五透镜具有光焦度；
    所述第六透镜具有光焦度；
    所述第七透镜具有负光焦度，其物侧面为凸面；以及
    所述光学成像系统的总有效焦距f与所述第七透镜的有效焦距f7满足-1＜f/f7＜0。
  12. 根据权利要求11所述的光学成像系统，其特征在于，所述光学成像系统的总有效焦距f与所述光学成像系统的最大半视场角HFOV满足3.9mm≤f*TAN(HFOV)＜4.5mm。
  13. 根据权利要求11所述的光学成像系统，其特征在于，所述第一透镜至所述第七透镜分别于所述光轴上的中心厚度的总和∑CT与所述第一透镜的物侧面至所述光学成像系统的成像面在所述光轴上的距离TTL满足0.5≤∑CT/TTL≤0.7。
  14. 根据权利要求13所述的光学成像系统，其特征在于，所述第二透镜和所述第三透镜在所述光轴上的间隔距离T23与所述第三透镜在所述光轴上的中心厚度CT3满足0.1≤T23/CT3＜0.8。
  15. 根据权利要求13所述的光学成像系统，其特征在于，所述第一透镜在所述光轴上的中心厚度CT1、所述第二透镜在所述光轴上的中心厚度CT2、所述第三透镜在所述光轴上的中心厚度CT3与所述第四透镜在所述光轴上的中心厚度CT4满足0.7≤CT1/(CT2+CT3+CT4)＜1.1。
  16. 根据权利要求11所述的光学成像系统，其特征在于，所述第一透镜像侧面的曲率半径R2与所述第一透镜物侧面的曲率半径R1满足1＜R2/(R1*2)≤2.5。
  17. 根据权利要求16所述的光学成像系统，其特征在于，所述光学成像系统的总有效焦距f与所述第一透镜的有效焦距f1满足1≤f/f1＜1.5。
  18. 根据权利要求11所述的光学成像系统，其特征在于，所述第七透镜的物侧面的曲率半径R13、所述第七透镜的像侧面的曲率半径R14、所述第六透镜的物侧面的曲率半径R11与所述第六透镜的像侧面的曲率半径R12满足0.3＜(R13+R14)/(R11+R12)＜1。
  19. 根据权利要求11所述的光学成像系统，其特征在于，所述第三透镜和所述第四透镜的组合焦距f34与所述第五透镜和所述第六透镜的组合焦距f56满足-5＜f34/f56＜1。
  20. 根据权利要求19所述的光学成像系统，其特征在于，所述光学成像系统的总有效焦距f与所述光学成像系统的入瞳直径EPD满足f/EPD≤1.8。
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