WO2021068753A1 - 光学成像系统 - Google Patents

光学成像系统 Download PDF

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Publication number
WO2021068753A1
WO2021068753A1 PCT/CN2020/117368 CN2020117368W WO2021068753A1 WO 2021068753 A1 WO2021068753 A1 WO 2021068753A1 CN 2020117368 W CN2020117368 W CN 2020117368W WO 2021068753 A1 WO2021068753 A1 WO 2021068753A1
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Prior art keywords
lens
imaging system
optical imaging
object side
optical
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PCT/CN2020/117368
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English (en)
French (fr)
Inventor
闻人建科
孔旭乐
戴付建
赵烈烽
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浙江舜宇光学有限公司
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Priority to US17/598,315 priority Critical patent/US20220229275A1/en
Publication of WO2021068753A1 publication Critical patent/WO2021068753A1/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
    • G02B13/02—Telephoto objectives, i.e. systems of the type + - in which the distance from the front vertex to the image plane is less than the equivalent focal length
    • 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

  • This application relates to the field of optical elements, and more specifically, to an optical imaging system.
  • multiple lens groups are usually used to achieve photography with different focal lengths, which usually include an optical imaging system that is equivalent to the telephoto end of a zoom imaging system.
  • the present application provides an optical imaging system that can be applied to portable electronic products and can at least solve or partially solve at least one of the above-mentioned shortcomings in the prior art.
  • the present application provides such an optical imaging system, which includes in order from the object side to the image side along the optical axis: a first lens with optical power; a second lens with optical power, the image side surface of which may be concave; The third lens with optical power; the fourth lens with optical power; the fifth lens with optical power; the sixth lens with optical power; the seventh lens with optical power, whose object side can be Convex; the eighth lens with optical power.
  • the image side surface of the first lens may be convex.
  • the second lens may have negative refractive power.
  • the object side surface of the fifth lens may be convex.
  • Semi-FOV of half of the maximum angle of view of the optical imaging system may satisfy Semi-FOV ⁇ 30°.
  • the image side surface of the first lens is 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 ⁇ 1.3.
  • the maximum effective half-aperture DT11 of the object side of the first lens and the maximum effective half-aperture DT81 of the object side of the eighth lens may satisfy DT81/DT11 ⁇ 0.87.
  • the on-axis distance from the intersection of the object side surface of the fourth lens and the optical axis to the apex of the effective radius of the object side of the fourth lens SAG41 and the intersection point of the object side surface of the third lens and the optical axis to the object side surface of the third lens can satisfy 0.1 ⁇ SAG41/SAG31 ⁇ 0.9.
  • the curvature radius R3 of the object side surface of the second lens and the curvature radius R4 of the image side surface of the second lens may satisfy 0.2 ⁇ R4/R3 ⁇ 0.8.
  • the maximum effective half-aperture DT41 of the object side of the fourth lens and the maximum effective half-aperture DT51 of the object side of the fifth lens may satisfy DT51/DT41 ⁇ 1.
  • the radius of curvature R1 of the object side surface of the first lens and the effective focal length f1 of the first lens may satisfy
  • the separation distance T56 between the fifth lens and the sixth lens on the optical axis, the separation distance T67 between the sixth lens and the seventh lens on the optical axis, and the distance between the seventh lens and the eighth lens on the optical axis can satisfy 0 ⁇ (T56+T67+T78)/TTL ⁇ 0.4.
  • the central thickness CT1 of the first lens on the optical axis and the central thickness CT3 of the third lens on the optical axis may satisfy 0.2 ⁇ CT3/CT1 ⁇ 1.0.
  • the central thickness CT4 of the fourth lens on the optical axis and the central thickness CT5 of the fifth lens on the optical axis may satisfy 0.3 ⁇ CT5/CT4 ⁇ 1.0.
  • the radius of curvature R13 of the object side surface of the seventh lens and the total effective focal length f of the optical imaging system may satisfy 0.1 ⁇ R13/f ⁇ 1.0.
  • the separation distance between the object side surface of the first lens and the imaging surface of the optical imaging system on the optical axis TTL and the total effective focal length f of the optical imaging system may satisfy TTL/f ⁇ 1.18.
  • the radius of curvature R9 of the object side surface of the fifth lens and the radius of curvature R10 of the image side surface of the fifth lens may satisfy 0.5 ⁇
  • This application uses eight lenses. By reasonably distributing the refractive power, surface shape, center thickness of each lens, and on-axis distance between each lens, the above-mentioned optical imaging system has a long focal length, a large aperture, and a small size. At least one beneficial effect.
  • Figure 1 shows a schematic structural diagram of an optical imaging system according to Embodiment 1 of the present application
  • Figures 2A to 2D respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration 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 respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve, and chromatic aberration of magnification of the optical imaging system of Embodiment 2 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 axial chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration of the optical imaging system of Embodiment 3, respectively curve;
  • FIGS. 8A to 8D show the axial chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration of the optical imaging system of Embodiment 4, respectively. curve;
  • FIGS. 10A to 10D respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration of the optical imaging system of Embodiment 5 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 respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve, and chromatic aberration of magnification of the optical imaging system of Embodiment 6 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 respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration of the optical imaging system of Embodiment 7 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 respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve, and chromatic aberration of magnification of the optical imaging system of Embodiment 8 curve.
  • first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any restriction on the feature. Therefore, without departing from the teachings of the present application, the first lens discussed below may also be referred to as a second lens or a third lens.
  • the thickness, size, and shape of the lens have been slightly exaggerated for ease of description.
  • the shape of the spherical or aspherical surface shown in the drawings is shown by way of example. That is, the shape of the spherical surface or the aspheric surface is not limited to the shape of the spherical surface or the aspheric surface shown in the drawings.
  • the drawings are only examples and are not drawn strictly to scale.
  • the paraxial area refers to the area near the optical axis. If the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the position of the concave surface is not defined, it means that the lens surface is at least in the paraxial region. Concave. The surface of each lens closest to the object is called the object side of the lens, and the surface of each lens closest to the imaging surface is called the image side of the lens.
  • the optical imaging system may include, for example, eight lenses with optical power, namely, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a second lens. Seven lens and eighth lens.
  • the eight lenses are arranged in order from the object side to the image side along the optical axis. In the first lens to the eighth lens, there may be an air gap between any two adjacent lenses.
  • the first lens may have positive refractive power or negative refractive power.
  • the second lens may have negative refractive power.
  • the third lens may have positive refractive power or negative refractive power
  • the fourth lens may have positive refractive power or negative refractive power
  • the fifth lens may have positive refractive power or negative refractive power
  • the sixth lens may have positive refractive power or negative refractive power. It has positive refractive power or negative refractive power
  • the seventh lens may have positive refractive power or negative refractive power
  • the eighth lens may have positive refractive power or negative refractive power.
  • the image side surface of the first lens when the image side surface of the first lens is convex, the image side surface of the second lens is concave, and the object side surface of the seventh lens is convex, or when the image side surface of the second lens is concave and the fifth lens
  • the optical imaging system of the present application may satisfy the conditional Semi-FOV ⁇ 30°, where Semi-FOV is half of the maximum field of view of the optical imaging system.
  • Semi-FOV may satisfy Semi-FOV ⁇ 22.5°, and more specifically, may satisfy 20.0° ⁇ Semi-FOV ⁇ 22.0°.
  • the optical imaging system of the present application can clearly image a distant object, and can be used in a multi-lens group, so that the multi-lens group has at least a telephoto end.
  • the optical imaging system of the present application may satisfy the condition f/EPD ⁇ 1.3, where f is the total effective focal length of the optical imaging system, and EPD is the entrance pupil diameter of the optical imaging system. More specifically, f and EPD may satisfy 1.05 ⁇ f/EPD ⁇ 1.3.
  • the optical imaging system can have a larger aperture, which is beneficial to increase the amount of light entering the optical imaging system, thereby improving the illuminance and imaging quality of the optical imaging system.
  • the optical imaging system of the present application can satisfy the conditional formula DT81/DT11 ⁇ 0.87, where DT11 is the maximum effective half diameter of the object side of the first lens, and the maximum effective half of the object side of the DT81 eighth lens caliber. More specifically, DT11 and DT81 may satisfy 0.7 ⁇ DT81/DT11 ⁇ 0.87. By controlling the ratio of the maximum effective semi-aperture of the object side surfaces of the first lens and the eighth lens, it is beneficial to reduce the size of the first lens and effectively reduce the size of the optical imaging system.
  • the optical imaging system of the present application may satisfy the conditional formula 0.1 ⁇ SAG41/SAG31 ⁇ 0.9, where SAG41 is the intersection of the object side surface of the fourth lens and the optical axis to the effective radius vertex of the object side surface of the fourth lens SAG31 is the on-axis distance from the intersection of the object side surface of the third lens and the optical axis to the vertex of the effective radius of the object side surface of the third lens. More specifically, SAG41 and SAG31 can satisfy 0.4 ⁇ SAG41/SAG31 ⁇ 0.6.
  • the optical imaging system of the present application may satisfy the conditional expression 0.2 ⁇ R4/R3 ⁇ 0.8, where R3 is the radius of curvature of the object side surface of the second lens, and R4 is the radius of curvature of the image side surface of the second lens . More specifically, R3 and R4 may satisfy 0.53 ⁇ R4/R3 ⁇ 0.63.
  • R3 and R4 may satisfy 0.53 ⁇ R4/R3 ⁇ 0.63.
  • the optical imaging system of the present application can satisfy the conditional expression DT51/DT41 ⁇ 1, where DT41 is the maximum effective half-aperture of the object side of the fourth lens, and DT51 is the maximum effective half of the object side of the fifth lens.
  • DT41 and DT51 can satisfy 0.80 ⁇ DT51/DT41 ⁇ 0.95.
  • the optical imaging system of the present application may satisfy the conditional formula
  • the optical imaging system of the present application may satisfy the conditional expression 0 ⁇ (T56+T67+T78)/TTL ⁇ 0.4, where T56 is the separation distance between the fifth lens and the sixth lens on the optical axis, T67 is the distance between the sixth lens and the seventh lens on the optical axis, T78 is the distance between the seventh lens and the eighth lens on the optical axis, and TTL is the distance between the object side of the first lens and the imaging surface of the optical imaging system The separation distance on the optical axis. More specifically, T56, T67, T78, and TTL may satisfy 0.15 ⁇ (T56+T67+T78)/TTL ⁇ 0.25.
  • optical imaging system By matching the sum of the separation distances between adjacent lenses of the fifth lens to the eighth lens with the total optical length of the optical imaging system, it is beneficial to reduce the total optical length of the optical imaging system and effectively reduce the overall size of the optical imaging system to enable optical imaging
  • the miniaturization of the system is more prominent.
  • the optical imaging system occupies a smaller assembly space and can be better adapted to equipment.
  • the optical imaging system of the present application can satisfy the conditional expression 0.2 ⁇ CT3/CT1 ⁇ 1.0, where CT1 is the central thickness of the first lens on the optical axis, and CT3 is the thickness of the third lens on the optical axis. Center thickness. More specifically, CT1 and CT3 can satisfy 0.50 ⁇ CT3/CT1 ⁇ 0.75.
  • CT1 and CT3 can satisfy 0.50 ⁇ CT3/CT1 ⁇ 0.75.
  • the optical imaging system of the present application can satisfy the conditional expression 0.3 ⁇ CT5/CT4 ⁇ 1.0, where CT4 is the central thickness of the fourth lens on the optical axis, and CT5 is the thickness of the fifth lens on the optical axis. Center thickness. More specifically, CT4 and CT5 can satisfy 0.55 ⁇ CT5/CT4 ⁇ 0.85.
  • CT4 and CT5 can satisfy 0.55 ⁇ CT5/CT4 ⁇ 0.85.
  • the optical imaging system of the present application may satisfy the conditional formula 0.1 ⁇ R13/f ⁇ 1.0, where R12 is the radius of curvature of the object side surface of the seventh lens, and f is the total effective focal length of the optical imaging system. More specifically, R13 and f may satisfy 0.45 ⁇ R13/f ⁇ 0.80.
  • R13 and f may satisfy 0.45 ⁇ R13/f ⁇ 0.80.
  • the optical imaging system of the present application can satisfy the conditional TTL/f ⁇ 1.18, where TTL is the separation distance from the object side of the first lens to the imaging surface of the optical imaging system on the optical axis, and f is The total effective focal length of the optical imaging system. More specifically, TTL and f may satisfy 1.09 ⁇ TTL/f ⁇ 1.18.
  • TTL and f may satisfy 1.09 ⁇ TTL/f ⁇ 1.18.
  • the optical imaging system of the present application may satisfy the conditional expression 0.5 ⁇
  • the radius of curvature. More specifically, R9 and R10 may satisfy 0.78 ⁇
  • the optical power of the fifth lens can be made relative to the optical power. The total optical power of the imaging system is matched.
  • the above-mentioned optical imaging system may further include at least one diaphragm.
  • the diaphragm can be arranged at an appropriate position as required, for example, 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 the photosensitive element on the imaging surface.
  • the optical imaging system according to the above-mentioned embodiment of the present application may use a plurality of lenses, for example, the above-mentioned eight lenses.
  • the volume of the imaging system can be effectively reduced, the sensitivity of the imaging system is reduced, and the reliability of the imaging system is improved.
  • Processability makes the optical imaging system more conducive to production and processing and can be applied to portable electronic products.
  • the optical imaging system of the present application also has excellent optical performance such as long focal length, large aperture, and miniaturization.
  • At least one of the mirror surfaces of each lens is an aspheric mirror surface, that is, at least one of the object side surface of the first lens to the image side surface of the eighth lens is an aspheric mirror surface.
  • the characteristic of an aspheric lens is that the curvature changes continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens with a constant curvature from the center of the lens to the periphery of the lens, an aspheric lens has better curvature radius characteristics, and has the advantages of improving distortion and astigmatism. After the aspheric lens is used, the aberrations that occur during imaging can be eliminated as much as possible, thereby improving the imaging quality.
  • At least one of the object side surface and the image side surface of each of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, and the eighth lens It is an aspherical mirror surface.
  • the object side and the image side of each of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, and the eighth lens are aspherical lenses. surface.
  • the number of lenses constituting the optical imaging system can be changed to obtain the various results and advantages described in this specification.
  • the optical imaging system is not limited to including eight lenses. If necessary, the optical imaging system may also include other numbers of lenses.
  • FIG. 1 shows a schematic structural diagram of an optical imaging system according to Embodiment 1 of the present application.
  • the optical imaging system includes in order from the object side to the image side along the optical axis: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, and a fifth lens E5. ,
  • the sixth lens E6 the seventh lens E7, the eighth lens E8 and the filter E9.
  • the first lens E1 has a positive refractive power
  • the object side surface S1 is a convex surface
  • the image side surface S2 is a convex surface.
  • the second lens E2 has a negative refractive power
  • the object side surface S3 is a convex surface
  • the image side surface S4 is a concave surface.
  • the third lens E3 has a negative refractive power
  • the object side surface S5 is a convex surface
  • the image side surface S6 is a concave surface.
  • the fourth lens E4 has a positive refractive power
  • the object side surface S7 is a convex surface
  • the image side surface S8 is a concave surface.
  • the fifth lens E5 has a negative refractive 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 refractive power
  • the object side surface S11 is a convex surface
  • the image side surface S12 is a convex surface.
  • the seventh lens E7 has a negative refractive power
  • the object side surface S13 is a convex surface
  • the image side surface S14 is a concave surface.
  • the eighth lens E8 has a negative refractive power
  • the object side surface S15 is a convex surface
  • the image side surface S16 is a concave surface.
  • the filter E9 has an object side surface S17 and an image side surface S18.
  • the optical imaging system has an imaging surface S19, and the light from the object sequentially passes through the surfaces S1 to S18 and is finally imaged on the imaging surface S19.
  • Table 1 shows the basic parameter table of the optical imaging system of Embodiment 1, wherein the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm).
  • the value of the total effective focal length f of the optical imaging system is 7.98mm
  • the value of the on-axis distance TTL from the object side S1 of the first lens E1 to the imaging surface S19 is 8.70mm
  • the effective pixel area on the imaging surface S19 The value of ImgH, which is half of the diagonal length, is 3.43mm
  • the value of Semi-FOV, which is half of the maximum angle of view, is 21.61°
  • the value of the aperture number Fno of the optical imaging system is 1.30.
  • the object side and image side of any one of the first lens E1 to the eighth lens E8 are aspherical surfaces, and the surface shape x of each aspherical lens can be defined by but not limited to the following aspherical surface formula :
  • x is the distance vector height of the aspheric surface from the vertex of the aspheric surface when the height is h along the optical axis direction;
  • k is the conic coefficient;
  • Ai is the correction coefficient of the i-th order of the aspheric surface.
  • Table 2 shows the high-order coefficients A 4 , A 6 , A 8 , A 10 , A 12 , A 14 , A 16 , A 18 and A 20 that can be used for each aspheric mirror surface S1 to S16 in Example 1. .
  • FIGS. 2A to 2D it can be seen that the optical imaging system given in Embodiment 1 can achieve good imaging quality.
  • FIG. 3 shows 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: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, and a fifth lens E5. ,
  • the first lens E1 has a positive refractive power
  • the object side surface S1 is a convex surface
  • the image side surface S2 is a convex surface.
  • the second lens E2 has a negative refractive power
  • the object side surface S3 is a convex surface
  • the image side surface S4 is a concave surface.
  • the third lens E3 has a negative refractive power
  • the object side surface S5 is a convex surface
  • the image side surface S6 is a concave surface.
  • the fourth lens E4 has a positive refractive power
  • the object side surface S7 is a convex surface
  • the image side surface S8 is a concave surface.
  • the fifth lens E5 has a negative refractive 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 refractive power
  • the object side surface S11 is a convex surface
  • the image side surface S12 is a convex surface.
  • the seventh lens E7 has a negative refractive power
  • the object side surface S13 is a convex surface
  • the image side surface S14 is a concave surface.
  • the eighth lens E8 has a negative refractive power
  • the object side surface S15 is a convex surface
  • the image side surface S16 is a concave surface.
  • the filter E9 has an object side surface S17 and an image side surface S18.
  • the optical imaging system has an imaging surface S19, and the light from the object sequentially passes through the surfaces S1 to S18 and is finally imaged on the imaging surface S19.
  • the value of the total effective focal length f of the optical imaging system is 7.80 mm
  • the value of the on-axis distance TTL from the object side S1 of the first lens E1 to the imaging surface S19 is 8.80 mm
  • the effective pixel area on the imaging surface S19 The value of ImgH, which is half the diagonal length, is 3.43mm
  • the value of Semi-FOV, which is half of the maximum angle of view, is 21.56°
  • the value of the aperture number Fno of the optical imaging system is 1.20.
  • Table 3 shows the basic parameter table of the optical imaging system of Embodiment 2, wherein the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm).
  • Table 4 shows the coefficients of higher-order terms that can be used for each aspheric mirror surface in Embodiment 2, where each aspheric surface type can be defined by the formula (1) given in Embodiment 1 above.
  • FIG. 4A shows the on-axis chromatic aberration curve of the optical imaging system of Embodiment 2, which represents the deviation of the convergence point of light of different wavelengths after passing through the system.
  • 4B shows the astigmatism curve of the optical imaging system of Example 2, which represents meridional field curvature and sagittal field curvature.
  • FIG. 4C shows a distortion curve of the optical imaging system of Embodiment 2, which represents the distortion magnitude values corresponding to different field angles.
  • 4D shows the chromatic aberration curve of magnification of the optical imaging system of Embodiment 2, which represents the deviation of different image heights on the imaging surface after light passes through the system. According to FIGS. 4A to 4D, it can be seen that the optical imaging system provided in Embodiment 2 can achieve good imaging quality.
  • FIG. 5 shows 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: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, and a fifth lens E5. ,
  • the sixth lens E6 the seventh lens E7, the eighth lens E8 and the filter E9.
  • the first lens E1 has a positive refractive power
  • the object side surface S1 is a convex surface
  • the image side surface S2 is a convex surface.
  • the second lens E2 has a negative refractive power
  • the object side surface S3 is a convex surface
  • the image side surface S4 is a concave surface.
  • the third lens E3 has a negative refractive power
  • the object side surface S5 is a convex surface
  • the image side surface S6 is a concave surface.
  • the fourth lens E4 has a positive refractive power
  • the object side surface S7 is a convex surface
  • the image side surface S8 is a concave surface.
  • the fifth lens E5 has a negative refractive 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 refractive 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 refractive power
  • the object side surface S13 is a convex surface
  • the image side surface S14 is a concave surface.
  • the eighth lens E8 has a negative refractive power
  • the object side surface S15 is a concave surface
  • the image side surface S16 is a concave surface.
  • the filter E9 has an object side surface S17 and an image side surface S18.
  • the optical imaging system has an imaging surface S19, and the light from the object sequentially passes through the surfaces S1 to S18 and is finally imaged on the imaging surface S19.
  • the value of the total effective focal length f of the optical imaging system is 7.80mm
  • the value of the on-axis distance TTL from the object side S1 of the first lens E1 to the imaging surface S19 is 8.80mm
  • the effective pixel area on the imaging surface S19 The value of ImgH, which is half of the diagonal length, is 3.43mm
  • the value of Semi-FOV, which is half of the maximum angle of view, is 21.58°
  • the value of Fno of the optical imaging system is 1.16.
  • Table 5 shows the basic parameter table of the optical imaging system of Embodiment 3, wherein the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm).
  • Table 6 shows the coefficients of higher-order terms that can be used for each aspheric mirror surface in Embodiment 3, where each aspheric surface type can be defined by the formula (1) given in Embodiment 1 above.
  • 6A shows the on-axis chromatic aberration curve of the optical imaging system of Embodiment 3, which represents the deviation of the convergence point of light rays of different wavelengths after passing through the system.
  • 6B shows the astigmatism curve of the optical imaging system of Example 3, which represents meridional field curvature and sagittal field curvature.
  • FIG. 6C shows a distortion curve of the optical imaging system of Embodiment 3, which represents the distortion magnitude values corresponding to different field angles.
  • 6D shows the chromatic aberration curve of magnification of the optical imaging system of Embodiment 3, which represents the deviation of different image heights on the imaging surface after light passes through the system. It can be seen from FIGS. 6A to 6D that the optical imaging system provided in Embodiment 3 can achieve good imaging quality.
  • FIG. 7 shows 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: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, and a fifth lens E5. ,
  • the first lens E1 has a positive refractive power
  • the object side surface S1 is a convex surface
  • the image side surface S2 is a convex surface.
  • the second lens E2 has a negative refractive power
  • the object side surface S3 is a convex surface
  • the image side surface S4 is a concave surface.
  • the third lens E3 has a positive refractive power
  • the object side surface S5 is a convex surface
  • the image side surface S6 is a concave surface.
  • the fourth lens E4 has a positive refractive power
  • the object side surface S7 is a convex surface
  • the image side surface S8 is a concave surface.
  • the fifth lens E5 has a negative refractive 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 refractive 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 refractive power
  • the object side surface S13 is a convex surface
  • the image side surface S14 is a concave surface.
  • the eighth lens E8 has a negative refractive power
  • the object side surface S15 is a convex surface
  • the image side surface S16 is a concave surface.
  • the filter E9 has an object side surface S17 and an image side surface S18.
  • the optical imaging system has an imaging surface S19, and the light from the object sequentially passes through the surfaces S1 to S18 and is finally imaged on the imaging surface S19.
  • the value of the total effective focal length f of the optical imaging system is 7.80mm
  • the value of the on-axis distance TTL from the object side S1 of the first lens E1 to the imaging surface S19 is 8.90mm
  • the effective pixel area on the imaging surface S19 The value of ImgH, which is half of the diagonal length, is 3.43mm
  • the value of Semi-FOV, which is half of the maximum angle of view, is 21.59°
  • the value of Fno of the optical imaging system is 1.15.
  • Table 7 shows the basic parameter table of the optical imaging system of Embodiment 4, wherein the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm).
  • Table 8 shows the high-order term coefficients A 4 , A 6 , A 8 , A 10 , A 12 , A 14 , A 16 , A 18 , A 20 and each of the aspheric mirror surfaces S1 to S16 that can be used in Embodiment 4.
  • a 22 where each aspheric surface type can be defined by the formula (1) given in the above embodiment 1.
  • FIG. 8A shows the on-axis chromatic aberration curve of the optical imaging system of Embodiment 4, which indicates the deviation of the convergence point of light rays of different wavelengths after passing through the system.
  • FIG. 8B shows the astigmatism curve of the optical imaging system of Example 4, which represents meridional field curvature and sagittal field curvature.
  • FIG. 8C shows the distortion curve of the optical imaging system of Embodiment 4, which represents the distortion magnitude values corresponding to different field angles.
  • FIG. 8D shows the chromatic aberration curve of magnification of the optical imaging system of Embodiment 4, which represents the deviation of different image heights on the imaging surface after light passes through the system. It can be seen from FIGS. 8A to 8D that the optical imaging system provided in Embodiment 4 can achieve good imaging quality.
  • FIG. 9 shows 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: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, and a fifth lens E5. ,
  • the first lens E1 has a positive refractive power
  • the object side surface S1 is a convex surface
  • the image side surface S2 is a convex surface.
  • the second lens E2 has a negative refractive power
  • the object side surface S3 is a convex surface
  • the image side surface S4 is a concave surface.
  • the third lens E3 has a positive refractive power
  • the object side surface S5 is a convex surface
  • the image side surface S6 is a concave surface.
  • the fourth lens E4 has a positive refractive power
  • the object side surface S7 is a convex surface
  • the image side surface S8 is a concave surface.
  • the fifth lens E5 has a negative refractive 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 refractive 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 refractive power
  • the object side surface S13 is a convex surface
  • the image side surface S14 is a concave surface.
  • the eighth lens E8 has a negative refractive power
  • the object side surface S15 is a convex surface
  • the image side surface S16 is a concave surface.
  • the filter E9 has an object side surface S17 and an image side surface S18.
  • the optical imaging system has an imaging surface S19, and the light from the object sequentially passes through the surfaces S1 to S18 and is finally imaged on the imaging surface S19.
  • the value of the total effective focal length f of the optical imaging system is 7.70mm
  • the value of the on-axis distance TTL from the object side S1 of the first lens E1 to the imaging surface S19 is 8.90mm
  • the effective pixel area on the imaging surface S19 The value of ImgH, which is half of the diagonal length, is 3.43mm
  • the value of Semi-FOV, which is half of the maximum angle of view, is 21.60°
  • the value of Fno of the optical imaging system is 1.12.
  • Table 9 shows the basic parameter table of the optical imaging system of Embodiment 5, in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm).
  • Table 10 shows the coefficients of higher-order terms that can be used for each aspheric mirror surface in Embodiment 5, where each aspheric surface type can be defined by the formula (1) given in Embodiment 1 above.
  • FIG. 10A shows the on-axis chromatic aberration curve of the optical imaging system of Embodiment 5, which represents the deviation of the convergence point of light rays of different wavelengths after passing through the system.
  • FIG. 10B shows the astigmatism curve of the optical imaging system of Example 5, which represents meridional field curvature and sagittal field curvature.
  • Fig. 10C shows a distortion curve of the optical imaging system of Embodiment 5, which represents the magnitude of distortion corresponding to different angles of view.
  • FIG. 10D shows the chromatic aberration curve of magnification of the optical imaging system of Embodiment 5, which represents the deviation of different image heights on the imaging surface after light passes through the system. According to FIGS. 10A to 10D, it can be seen that the optical imaging system provided in Embodiment 5 can achieve good imaging quality.
  • FIG. 11 shows a schematic structural diagram of an optical imaging system according to Embodiment 6 of the present application.
  • the optical imaging system includes in order from the object side to the image side along the optical axis: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, and a fifth lens E5. ,
  • the first lens E1 has a positive refractive power
  • the object side surface S1 is a convex surface
  • the image side surface S2 is a convex surface.
  • the second lens E2 has a negative refractive power
  • the object side surface S3 is a convex surface
  • the image side surface S4 is a concave surface.
  • the third lens E3 has a negative refractive power
  • the object side surface S5 is a convex surface
  • the image side surface S6 is a concave surface.
  • the fourth lens E4 has a positive refractive power
  • the object side surface S7 is a convex surface
  • the image side surface S8 is a concave surface.
  • the fifth lens E5 has a negative refractive 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 refractive 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 refractive power
  • the object side surface S13 is a convex surface
  • the image side surface S14 is a concave surface.
  • the eighth lens E8 has a negative refractive power
  • the object side surface S15 is a convex surface
  • the image side surface S16 is a concave surface.
  • the filter E9 has an object side surface S17 and an image side surface S18.
  • the optical imaging system has an imaging surface S19, and the light from the object sequentially passes through the surfaces S1 to S18 and is finally imaged on the imaging surface S19.
  • Example 6 the value of the total effective focal length f of the optical imaging system is 7.70mm, the value of the on-axis distance TTL from the object side S1 of the first lens E1 to the imaging surface S19 is 8.90mm, and the effective pixel area on the imaging surface S19
  • Table 11 shows the basic parameter table of the optical imaging system of Embodiment 6, wherein the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm).
  • Table 12 shows the coefficients of higher-order terms that can be used for each aspheric mirror surface in Embodiment 6, where each aspheric surface type can be defined by the formula (1) given in Embodiment 1 above.
  • FIG. 12A shows the on-axis chromatic aberration curve of the optical imaging system of Embodiment 6, which indicates the deviation of the convergence point of light rays of different wavelengths after passing through the system.
  • FIG. 12B shows the astigmatism curve of the optical imaging system of Example 6, which represents meridional field curvature and sagittal field curvature.
  • FIG. 12C shows a distortion curve of the optical imaging system of Embodiment 6, which represents the distortion magnitude values corresponding to different field angles.
  • FIG. 12D shows the chromatic aberration curve of magnification of the optical imaging system of Example 6, which represents the deviation of different image heights on the imaging surface after light passes through the system. It can be seen from FIGS. 12A to 12D that the optical imaging system provided in Embodiment 6 can achieve good imaging quality.
  • FIG. 13 shows 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: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, and a fifth lens E5. ,
  • the first lens E1 has a positive refractive power
  • the object side surface S1 is a convex surface
  • the image side surface S2 is a convex surface.
  • the second lens E2 has a negative refractive power
  • the object side surface S3 is a convex surface
  • the image side surface S4 is a concave surface.
  • the third lens E3 has a positive refractive power
  • the object side surface S5 is a convex surface
  • the image side surface S6 is a concave surface.
  • the fourth lens E4 has a positive refractive power
  • the object side surface S7 is a convex surface
  • the image side surface S8 is a concave surface.
  • the fifth lens E5 has a negative refractive 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 refractive 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 refractive power
  • the object side surface S13 is a convex surface
  • the image side surface S14 is a concave surface.
  • the eighth lens E8 has a negative refractive power
  • the object side surface S15 is a convex surface
  • the image side surface S16 is a concave surface.
  • the filter E9 has an object side surface S17 and an image side surface S18.
  • the optical imaging system has an imaging surface S19, and the light from the object sequentially passes through the surfaces S1 to S18 and is finally imaged on the imaging surface S19.
  • the value of the total effective focal length f of the optical imaging system is 7.70mm
  • the value of the on-axis distance TTL from the object side S1 of the first lens E1 to the imaging surface S19 is 8.90mm
  • the effective pixel area on the imaging surface S19 The value of ImgH, which is half of the diagonal length, is 3.43mm
  • the value of Semi-FOV, which is half of the maximum angle of view, is 21.55°
  • the value of Fno of the optical imaging system is 1.10.
  • Table 13 shows the basic parameter table of the optical imaging system of Embodiment 7, wherein the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm).
  • Table 14 shows the high-order coefficients A 4 , A 6 , A 8 , A 10 , A 12 , A 14 , A 16 , A 18 , A 20 , A 4, A 6, A 8, A 10, A 12, A 14, A 16, A 18, A 20, A 4, A 6, A 8, A 10, A 12, A 14, A 16, A 18, A 20, A 4, A 6, A 8, A 10, A 12, A 14, A 16 that can be used for each aspheric mirror S1 to S 16 in Example 7 A 22 , A 24 , A 26 , A 28 and A 30 , where each aspheric surface type can be defined by the formula (1) given in the above embodiment 1.
  • FIG. 14A shows the on-axis chromatic aberration curve of the optical imaging system of Embodiment 7, which indicates the deviation of the convergence point of light of different wavelengths after passing through the system.
  • FIG. 14B shows the astigmatism curve of the optical imaging system of Example 7, which represents meridional field curvature and sagittal field curvature.
  • FIG. 14C shows the distortion curve of the optical imaging system of Embodiment 7, which represents the distortion magnitude values corresponding to different field angles.
  • FIG. 14D shows the chromatic aberration curve of magnification of the optical imaging system of Example 7, which represents the deviation of different image heights on the imaging surface after light passes through the system. According to FIGS. 14A to 14D, it can be seen that the optical imaging system provided in Embodiment 7 can achieve good imaging quality.
  • FIG. 15 shows 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: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, and a fifth lens E5. ,
  • the sixth lens E6 the seventh lens E7, the eighth lens E8 and the filter E9.
  • the first lens E1 has a positive refractive power
  • the object side surface S1 is a convex surface
  • the image side surface S2 is a convex surface.
  • the second lens E2 has a negative refractive power
  • the object side surface S3 is a convex surface
  • the image side surface S4 is a concave surface.
  • the third lens E3 has a positive refractive power
  • the object side surface S5 is a convex surface
  • the image side surface S6 is a concave surface.
  • the fourth lens E4 has a positive refractive power
  • the object side surface S7 is a convex surface
  • the image side surface S8 is a concave surface.
  • the fifth lens E5 has a negative refractive 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 refractive 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 refractive power
  • the object side surface S13 is a convex surface
  • the image side surface S14 is a concave surface.
  • the eighth lens E8 has a negative refractive power
  • the object side surface S15 is a convex surface
  • the image side surface S16 is a concave surface.
  • the filter E9 has an object side surface S17 and an image side surface S18.
  • the optical imaging system has an imaging surface S19, and the light from the object sequentially passes through the surfaces S1 to S18 and is finally imaged on the imaging surface S19.
  • the value of the total effective focal length f of the optical imaging system is 7.54mm
  • the value of the on-axis distance TTL from the object side S1 of the first lens E1 to the imaging surface S19 is 8.90mm
  • the effective pixel area on the imaging surface S19 The value of ImgH, which is half of the diagonal length, is 3.43mm
  • the value of Semi-FOV, which is half of the maximum angle of view, is 21.62°
  • the value of Fno of the optical imaging system is 1.09.
  • Table 15 shows the basic parameter table of the optical imaging system of Embodiment 8, wherein the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm).
  • Table 16 shows the coefficients of higher-order terms that can be used for each aspheric mirror surface in Embodiment 8, where each aspheric surface type can be defined by the formula (1) given in Embodiment 1 above.
  • FIG. 16A shows the on-axis chromatic aberration curve of the optical imaging system of Embodiment 8, which indicates the deviation of the convergence point of light rays of different wavelengths after passing through the system.
  • 16B shows the astigmatism curve of the optical imaging system of Example 8, which represents meridional field curvature and sagittal field curvature.
  • FIG. 16C shows the distortion curve of the optical imaging system of Embodiment 8, which represents the distortion magnitude values corresponding to different field angles.
  • 16D shows the chromatic aberration curve of magnification of the optical imaging system of Example 8, which represents the deviation of different image heights on the imaging surface after 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.
  • Examples 1 to 8 satisfy the relationships shown in Table 17 respectively.
  • the present application also provides an imaging device, which is provided with an electronic photosensitive element for imaging.
  • the electronic photosensitive element may be a Charge Coupled Device (CCD) or a Complementary Metal Oxide Semiconductor (CMOS).
  • CMOS Complementary Metal Oxide Semiconductor
  • 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.

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Abstract

本申请公开了一种光学成像系统，其沿光轴由物侧至像侧依序包括：具有光焦度的第一透镜；具有负光焦度的第二透镜，其像侧面为凹面；具有光焦度的第三透镜；具有光焦度的第四透镜；具有光焦度的第五透镜，其物侧面为凸面；具有光焦度的第六透镜；具有光焦度的第七透镜，其物侧面为凸面；具有光焦度的第八透镜；光学成像系统的最大视场角的一半Semi-FOV满足Semi-FOV＜30°。

Description

光学成像系统
相关申请的交叉引用
本申请要求于2019年10月08日递交于中国国家知识产权局(CNIPA)的、申请号为201910949230.5、发明名称为“光学成像系统”的中国发明专利申请的优先权和权益，这项申请通过引用整体并入本文。
技术领域
本申请涉及光学元件领域，更具体地，涉及一种光学成像系统。
背景技术
近年来，随着消费式电子产品的升级换代以及消费式电子产品上图像软件功能、视频软件功能的发展，市场对适用于便携式电子产品的光学成像系统的需求逐渐增加。
由于便携式设备的机身尺寸的限制，在其中设置尺寸较大的变焦成像系统很困难。因此通常采用多镜头组来实现不同焦距的摄影，其中，通常包括有用作相当于变焦成像系统的长焦端的光学成像系统。
为了满足小型化需求并满足成像要求，市场期望一种能够兼顾小型化和长焦距、大孔径的光学成像系统。
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。
本申请提供了这样一种光学成像系统，其沿光轴由物侧至像侧依序包括：具有光焦度的第一透镜；具有光焦度的第二透镜，其像侧面可为凹面；具有光焦度的第三透镜；具有光焦度的第四透镜；具有光焦度的第五透镜；具有光焦度的第六透镜；具有光焦度的第七透镜，其物侧面可为凸面；具有光焦度的第八透镜。
在一个实施方式中，第一透镜的像侧面可为凸面。
在一个实施方式中，第二透镜可具有负光焦度。
在一个实施方式中，第五透镜的物侧面可为凸面。
在一个实施方式中，光学成像系统的最大视场角的一半Semi-FOV可满足Semi-FOV＜30°。
在一个实施方式中，第一透镜的像侧面为凸面。
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≤1.3。
在一个实施方式中，第一透镜的物侧面的最大有效半口径DT11和第八透镜的物侧面的最大有效半口径DT81可满足DT81/DT11≤0.87。
在一个实施方式中，第四透镜的物侧面和光轴的交点至第四透镜的物侧面的有效半径顶点的轴上距离SAG41与第三透镜的物侧面和光轴的交点至第三透镜的物侧面的有效半径顶点的轴上距离SAG31可满足0.1＜SAG41/SAG31＜0.9。
在一个实施方式中，第二透镜的物侧面的曲率半径R3与第二透镜的像侧面的曲率半径R4可满足0.2＜R4/R3＜0.8。
在一个实施方式中，第四透镜的物侧面的最大有效半口径DT41与第五透镜的物侧面的最大有效半口径DT51可满足DT51/DT41＜1。
在一个实施方式中，第一透镜的物侧面的曲率半径R1与第一透镜的有效焦距f1可满足|R1/f1|≤0.60。
在一个实施方式中，第五透镜和第六透镜在光轴上的间隔距离T56、第六透镜和第七透镜在光轴上的间隔距离T67、第七透镜和第八透镜在光轴上的间隔距离T78以及第一透镜的物侧面至光学成像系统的成像面在光轴上的间隔距离TTL可满足0＜(T56+T67+T78)/TTL＜0.4。
在一个实施方式中，第一透镜在光轴上的中心厚度CT1与第三透镜在光轴上的中心厚度CT3可满足0.2＜CT3/CT1＜1.0。
在一个实施方式中，第四透镜在光轴上的中心厚度CT4与第五透镜在光轴上的中心厚度CT5可满足0.3＜CT5/CT4＜1.0。
在一个实施方式中，第七透镜的物侧面的曲率半径R13与光学成像系统的总有效焦距f可满足0.1＜R13/f＜1.0。
在一个实施方式中，第一透镜的物侧面至光学成像系统的成像面在光轴上的间隔距离TTL与光学成像系统的总有效焦距f可满足TTL/f≤1.18。
在一个实施方式中，第五透镜的物侧面的曲率半径R9与第五透镜的像侧面的曲率半径R10可满足0.5＜|R10/R9|＜1。
本申请采用了八片透镜，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长焦距、大孔径和小型化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。
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。每个透镜最靠近被摄物体的表面称为该透镜的物侧面，每个透镜最靠近成像面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八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、第七透镜和第八透镜。这八片透镜沿着光轴由物侧至像侧依序排列。在第一透镜至第八透镜中，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或负光焦度。示例性的，第二透镜可具有负光焦度。示例性的，第三透镜可具有正光焦度或负光焦度，第四透镜可具有正光焦度或负光焦度，第五透镜可具有正光焦度或负光焦度，第六透镜可具有正光焦度或负光焦度；第七透镜可具有正光焦度或负光焦度，第八透镜可具有正光焦度或负光焦度。
在示例性实施中，当第一透镜的像侧面为凸面、第二透镜的像侧面为凹面且第七透镜的物侧面为凸面时，或者，当第二透镜的像侧面为凹面、第五透镜的物侧面为凸面且第七透镜物侧面为凸面时，有利于使每个透镜的光焦度适当，并有利于平衡控制光学成像系统的像差。
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Semi-FOV＜30°，其中， Semi-FOV是光学成像系统的最大视场角的一半。示例性地，Semi-FOV可满足Semi-FOV＜22.5°，更具体地可满足20.0°＜Semi-FOV＜22.0°。本申请的光学成像系统能够对较远的物体清晰成像，进而可以用于多镜头组，使多镜头组至少具有长焦端。
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≤1.3，其中，f是光学成像系统的总有效焦距，EPD是光学成像系统的入瞳直径。更具体地，f与EPD可满足1.05＜f/EPD≤1.3。通过控制光学成像系统的总有效焦距与入瞳直径的比值，可以使光学成像系统具有较大的孔径，并有利于提升光学成像系统的进光量，进而提升光学成像系统的照度和成像质量。
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DT81/DT11≤0.87，其中，DT11是第一透镜的物侧面的最大有效半口径，DT81第八透镜的物侧面的最大有效半口径。更具体地，DT11和DT81可满足0.7＜DT81/DT11≤0.87。通过控制第一透镜和第八透镜二者的物侧面的最大有效半口径之比，有利于减小第一透镜的尺寸，并有效减小光学成像系统的尺寸。
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＜SAG41/SAG31＜0.9，其中，SAG41是第四透镜的物侧面和光轴的交点至第四透镜的物侧面的有效半径顶点的轴上距离，SAG31是第三透镜的物侧面和光轴的交点至第三透镜的物侧面的有效半径顶点的轴上距离。更具体地，SAG41与SAG31可满足0.4＜SAG41/SAG31＜0.6。通过控制第四透镜的物侧面的矢高与第三透镜的物侧面的矢高之比，有利于控制第三透镜和第四透镜各自的光焦度，进而使光学成像系统的各透镜的光焦度比较平衡，进而有效地平衡各透镜贡献的像差。
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0.2＜R4/R3＜0.8，其中，R3是第二透镜的物侧面的曲率半径，R4是第二透镜的像侧面的曲率半径。更具体地，R3与R4可满足0.53＜R4/R3＜0.63。通过控制第二透镜的两个镜面的曲率半径比，有利于控制第二透镜的形状，进而使第二透镜具有较好的加工工艺性，此外，还有利于使光学成像系统的各透镜的光焦度比较平衡。
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DT51/DT41＜1，其中，DT41是第四透镜的物侧面的最大有效半口径，DT51是第五透镜的物侧面的最大有效半口径。更具体地，DT41与DT51可满足0.80＜DT51/DT41＜0.95。通过控制第四透镜和第五透镜二者的物侧面的最大有效半口径之比，有利于控制第四透镜的形状和第五透镜的形状，进而提升第四透镜和第五透镜各自的加工工艺性并提高光学成像系统的组装工艺性，还有利于提升光学成像系统的成像质量。
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|R1/f1|≤0.60，其中，R1是第一透镜的物侧面的曲率半径，f1是第一透镜的有效焦距。更具体地，R1与f1可满足0.55＜|R1/f1|≤0.60。通过使第一透镜的物侧面的曲率半径与其有效焦距匹配，有利于控制第一透镜的光焦度，并有利于约束第一透镜的加工张角，进而可提升第一透镜的加工工艺性。
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＜(T56+T67+T78)/TTL＜0.4，其中，T56是第五透镜和第六透镜在光轴上的间隔距离，T67是第六透镜和第七透镜在光轴上的间隔距离，T78是第七透镜和第八透镜在光轴上的间隔距离，TTL是第一透镜的物侧面至光学成像系统的成像面在光轴上的间隔距离。更具体地，T56、T67、T78以及TTL可满足0.15＜(T56+T67+T78)/TTL＜0.25。通过使第五透镜至第八透镜中相邻透镜的间隔距离之和与光学成像系统的光学总长匹配，有利于减小光学成像系统的光学总长并有效缩小光学成像系统的整体尺寸，使光学成像系统的小型化的特点更突出。该光学成像系统占有较小的装配空间，可更好的适用于设备。
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0.2＜CT3/CT1＜1.0，其中， CT1是第一透镜在光轴上的中心厚度，CT3是第三透镜在光轴上的中心厚度。更具体地，CT1与CT3可满足0.50＜CT3/CT1＜0.75。通过控制第三透镜的中心厚度与第一透镜的中心厚度的比值，有利于减小第一透镜的中心厚度以及第三透镜的中心厚度，进而有利于使光学成像系统的总长进一步减小，以有效减小光学成像系统的体积。
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＜CT5/CT4＜1.0，其中，CT4是第四透镜在光轴上的中心厚度，CT5是第五透镜在光轴上的中心厚度。更具体地，CT4与CT5可满足0.55＜CT5/CT4＜0.85。通过控制第五透镜的中心厚度和第四透镜的中心厚度的比值，有利于减小第四透镜的中心厚度和第五透镜的中心厚度，进而有利于使光学成像系统的总长进一步减小，以有效减小光学成像系统的体积。
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＜R13/f＜1.0，其中，R12是第七透镜的物侧面的曲率半径，f是光学成像系统的总有效焦距。更具体地，R13与f可满足0.45＜R13/f＜0.80。通过控制第七透镜的物侧面的曲率半径与总有效焦距的比值，可以有效控制第七透镜的形状和光焦度，使第七透镜的光焦度相对光学成像系统的总光焦度是匹配的，进而有利于使各个透镜的光焦度相互之间平衡。
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TTL/f≤1.18，其中，TTL是第一透镜的物侧面至光学成像系统的成像面在光轴上的间隔距离，f是光学成像系统的总有效焦距。更具体地，TTL与f可满足1.09≤TTL/f≤1.18。通过控制光学成像系统的光学总长与总有效焦距的比值，有利于控制光学总长，以使得光学成像系统在有限的光学总长条件下具有较长的焦距，使得光学成像系统拍摄距离较远的物体时具有更好的成像质量。
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＜|R10/R9|＜1，其中，R9是第五透镜的物侧面的曲率半径，R10是第五透镜的像侧面的曲率半径。更具体地，R9与R10可满足0.78＜|R10/R9|＜0.87。通过控制第五透镜的两个镜面的曲率半径之比，有利于控制第五透镜的形状，进而使第五透镜具有较好的加工工艺性，此外还可以使第五透镜的光焦度相对光学成像系统的总光焦度是匹配的。
在示例性实施方式中，上述光学成像系统还可包括至少一个光阑。光阑可根据需要设置在适当位置处，例如，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，例如上文所述的八片。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，可有效地缩小成像系统的体积、降低成像系统的敏感度并提高成像系统的可加工性，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。同时，本申请的光学成像系统还具备长焦距、大孔径及小型化等优良光学性能。
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，即，第一透镜的物侧面至第八透镜的像侧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。可选地，第一透镜、第二透镜、第三透镜、第四透镜、第五透镜、第六透镜、第七透镜和第八透镜中的每个透镜的物侧面和像侧面中的至少一个为非球面镜面。可选地，第一透镜、第二透镜、第三透镜、第四透镜、第五透镜、第六透镜、第七透镜和第八透镜中的每个透镜的物侧面和像侧面均为非球面镜面。
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八个透镜为例进行了描述，但是该光学成像系统不限于包括八个透镜。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，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、第八透镜E8和滤光片E9。
第一透镜E1具有正光焦度，其物侧面S1为凸面，像侧面S2为凸面。第二透镜E2具有负光焦度，其物侧面S3为凸面，像侧面S4为凹面。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为凸面，像侧面S8为凹面。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为凸面。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。第八透镜E8具有负光焦度，其物侧面S15为凸面，像侧面S16为凹面。滤光片E9具有物侧面S17和像侧面S18。光学成像系统具有成像面S19，来自物体的光依序穿过各表面S1至S18并最终成像在成像面S19上。
表1示出了实施例1的光学成像系统的基本参数表，其中，曲率半径、厚度/距离和焦距的单位均为毫米(mm)。
Figure PCTCN2020117368-appb-000001
表1
在实施例1中，光学成像系统的总有效焦距f的值是7.98mm，第一透镜E1的物侧面S1至成像面S19的轴上距离TTL的值是8.70mm，成像面S19上有效像素区域对角线长的一半ImgH的值是3.43mm，以及最大视场角的一半Semi-FOV的值是21.61°，光学成像系统的光圈数Fno的值是1.30。
在实施例1中，第一透镜E1至第八透镜E8中的任意一个透镜的物侧面和像侧面均为非球面，各非球面透镜的面型x可利用但不限于以下非球面公式进行限定：
Figure PCTCN2020117368-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；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至S16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 -8.4581E-04 -1.4862E-04 9.9297E-06 -5.0798E-07 -9.9798E-07 2.5979E-07 -3.6451E-08 2.4227E-09 -6.1355E-11
S2 6.3103E-03 4.9251E-04 -2.5899E-04 1.4646E-05 2.2693E-06 -3.0603E-07 1.0603E-08 0.0000E+00 0.0000E+00
S3 -1.8083E-02 3.8322E-03 3.2383E-04 -3.4201E-04 6.5606E-05 -5.0970E-06 1.2209E-07 1.7279E-09 0.0000E+00
S4 -2.4387E-02 7.1184E-03 -2.1316E-03 4.7043E-04 -7.6618E-05 4.9190E-06 3.7068E-07 -4.9076E-08 0.0000E+00
S5 -5.5888E-04 1.1094E-02 -5.9571E-03 1.6572E-03 -2.4335E-04 1.7641E-05 -4.5972E-07 0.0000E+00 0.0000E+00
S6 -1.0029E-01 5.0060E-02 -1.6509E-02 3.1216E-03 -1.3973E-04 -4.3524E-05 4.5945E-06 6.0271E-08 0.0000E+00
S7 -9.2730E-03 1.0104E-02 -1.7386E-02 8.6327E-03 -1.8260E-03 1.4119E-04 -1.7086E-07 1.1812E-07 0.0000E+00
S8 1.2192E-01 -4.9273E-02 -6.1404E-03 1.0700E-02 -3.7145E-03 5.4234E-04 -2.1697E-05 -1.0303E-06 0.0000E+00
S9 -5.8760E-02 6.3996E-03 2.1661E-03 -3.9077E-03 1.7098E-03 -3.3384E-04 2.8609E-05 -1.2463E-06 0.0000E+00
S10 -1.1721E-01 6.7508E-02 -1.0632E-01 1.5805E-01 -1.6123E-01 1.0304E-01 -3.9641E-02 8.4024E-03 -7.5697E-04
S11 -2.1902E-02 1.0901E-03 -8.5388E-03 6.6021E-03 -3.0419E-03 6.7900E-04 -4.9182E-05 -5.3913E-07 -1.1116E-07
S12 -2.5838E-02 6.0497E-03 -7.3894E-03 4.3337E-03 -1.5433E-03 2.8918E-04 -2.0239E-05 2.3189E-07 -6.9718E-08
S13 -8.7128E-02 3.9503E-03 5.3564E-03 -1.9759E-03 2.9056E-04 -1.4670E-05 -6.0004E-08 1.4079E-10 -2.4508E-10
S14 -9.2880E-02 1.2841E-02 4.9539E-04 -1.0963E-03 2.4921E-04 -1.8789E-05 -3.2355E-07 9.5551E-08 -2.8418E-09
S15 -5.4844E-02 2.4371E-02 -7.7130E-03 1.1052E-03 -5.2881E-05 -1.3503E-06 1.2587E-07 -2.2431E-09 2.3164E-10
S16 -5.9574E-02 2.1618E-02 -5.5450E-03 7.4377E-04 -4.2553E-05 -9.0272E-07 2.2985E-07 -1.2749E-08 6.1933E-10
表2
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汇聚焦点偏离。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，其表示不同视场角对应的畸变大小值。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，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、第 八透镜E8和滤光片E9。
第一透镜E1具有正光焦度，其物侧面S1为凸面，像侧面S2为凸面。第二透镜E2具有负光焦度，其物侧面S3为凸面，像侧面S4为凹面。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为凸面，像侧面S8为凹面。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为凸面。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。第八透镜E8具有负光焦度，其物侧面S15为凸面，像侧面S16为凹面。滤光片E9具有物侧面S17和像侧面S18。光学成像系统具有成像面S19，来自物体的光依序穿过各表面S1至S18并最终成像在成像面S19上。
在实施例2中，光学成像系统的总有效焦距f的值是7.80mm，第一透镜E1的物侧面S1至成像面S19的轴上距离TTL的值是8.80mm，成像面S19上有效像素区域对角线长的一半ImgH的值是3.43mm，以及最大视场角的一半Semi-FOV的值是21.56°，光学成像系统的光圈数Fno的值是1.20。
表3示出了实施例2的光学成像系统的基本参数表，其中，曲率半径、厚度/距离和焦距的单位均为毫米(mm)。表4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。
Figure PCTCN2020117368-appb-000003
表3
面号 A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 -1.0999E-03 -6.8705E-05 -3.6452E-05 1.6035E-05 -4.3954E-06 6.9764E-07 -6.9915E-08 3.9000E-09 -9.2004E-11
S2 4.8678E-03 3.9769E-04 -9.8894E-05 -1.4859E-05 4.3812E-06 -3.5031E-07 9.7302E-09 0.0000E+00 0.0000E+00
S3 -1.2260E-02 1.4121E-03 6.2931E-04 -2.6565E-04 3.9488E-05 -2.5589E-06 5.4748E-08 2.6707E-10 1.5114E-11
S4 -1.6379E-02 3.0816E-03 -8.4031E-04 2.2306E-04 -5.8740E-05 1.1048E-05 -1.4874E-06 1.3127E-07 -5.4726E-09
S5 -1.0642E-03 7.3851E-03 -3.2272E-03 7.4510E-04 -9.1185E-05 6.1291E-06 -2.5953E-07 1.2820E-08 -8.5576E-10
S6 -7.3385E-02 2.5840E-02 -3.4342E-03 -1.0551E-03 5.7726E-04 -9.8252E-05 5.5386E-06 5.5853E-08 0.0000E+00
S7 -8.9671E-04 -6.7073E-03 -9.4884E-04 9.5800E-04 -3.0328E-05 -4.7725E-05 5.7345E-06 2.0554E-08 1.0566E-08
S8 9.3471E-02 -3.4969E-02 -5.7553E-03 7.2428E-03 -2.2420E-03 3.0236E-04 -1.3243E-05 -4.9228E-08 -2.7059E-08
S9 -5.8804E-02 1.2458E-02 -1.5305E-03 -3.1268E-03 1.7832E-03 -3.2601E-04 2.4690E-06 4.1965E-06 -2.4783E-07
S10 -1.0007E-01 3.8174E-02 -1.7400E-02 3.3743E-03 1.2855E-03 -1.0932E-03 3.2277E-04 -3.7856E-05 0.0000E+00
S11 -2.3304E-02 9.2170E-04 -5.3761E-03 3.3896E-03 -1.4899E-03 3.2443E-04 -2.2233E-05 -1.1131E-07 -7.3632E-08
S12 -3.6139E-02 1.0680E-02 -7.5258E-03 3.3307E-03 -1.0056E-03 1.7419E-04 -1.2040E-05 2.5807E-07 -4.9712E-08
S13 -8.3830E-02 -2.9439E-03 9.0437E-03 -3.3930E-03 5.9696E-04 -4.5177E-05 9.3282E-07 3.8790E-09 6.4870E-10
S14 -7.3315E-02 -9.8581E-04 7.5097E-03 -3.3104E-03 6.5274E-04 -5.8209E-05 1.7427E-06 6.4850E-09 1.2398E-09
S15 -5.3565E-02 2.4799E-02 -8.3942E-03 1.4320E-03 -1.1077E-04 3.0216E-06 6.8725E-09 5.2894E-11 1.6593E-11
S16 -5.8378E-02 2.3215E-02 -7.3270E-03 1.4214E-03 -1.6092E-04 9.2608E-06 -1.7972E-07 8.5716E-10 -1.4875E-10
表4
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汇聚焦点偏离。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，其表示不同视场角对应的畸变大小值。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，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、第八透镜E8和滤光片E9。
第一透镜E1具有正光焦度，其物侧面S1为凸面，像侧面S2为凸面。第二透镜E2具有负光焦度，其物侧面S3为凸面，像侧面S4为凹面。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为凸面，像侧面S8为凹面。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。第八透镜E8具有负光焦度，其物侧面S15为凹面，像侧面S16为凹面。滤光片E9具有物侧面S17和像侧面S18。光学成像系统具有成像面S19，来自物体的光依序穿过各表面S1至S18并最终成像在成像面S19上。
在实施例3中，光学成像系统的总有效焦距f的值是7.80mm，第一透镜E1的物侧面S1至成像面S19的轴上距离TTL的值是8.80mm，成像面S19上有效像素区域对角线长的一半ImgH的值是3.43mm，以及最大视场角的一半Semi-FOV的值是21.58°，光学成像系统的光圈数Fno的值是1.16。
表5示出了实施例3的光学成像系统的基本参数表，其中，曲率半径、厚度/距离和焦距的单位均为毫米(mm)。表6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。
Figure PCTCN2020117368-appb-000004
Figure PCTCN2020117368-appb-000005
表5
面号 A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 -9.5116E-04 -1.0364E-04 -2.6724E-05 1.6176E-05 -4.7581E-06 7.4833E-07 -7.0579E-08 3.6592E-09 -8.0243E-11
S2 4.3136E-03 7.0713E-04 -2.2207E-04 1.2389E-05 1.1231E-06 -1.5157E-07 4.8449E-09 0.0000E+00 0.0000E+00
S3 -1.3291E-02 2.5164E-03 1.2074E-04 -1.4763E-04 2.4588E-05 -1.6124E-06 3.4114E-08 -5.5780E-11 2.2166E-11
S4 -1.7510E-02 4.6811E-03 -2.0722E-03 8.3901E-04 -2.8889E-04 7.0070E-05 -1.0908E-05 9.6125E-07 -3.6479E-08
S5 2.0843E-03 6.0969E-03 -3.0395E-03 7.5703E-04 -9.8319E-05 7.0154E-06 -3.2065E-07 1.6285E-08 -1.0409E-09
S6 -6.0892E-02 1.6379E-02 3.2453E-04 -1.7240E-03 5.8372E-04 -8.5639E-05 4.5224E-06 3.7865E-08 0.0000E+00
S7 2.7342E-04 -9.8443E-03 3.7864E-04 1.1102E-03 -2.4538E-04 2.1941E-06 1.5788E-06 1.3412E-07 0.0000E+00
S8 8.9914E-02 -3.1969E-02 -7.2733E-03 7.7723E-03 -2.3699E-03 3.2337E-04 -1.4865E-05 -8.9853E-08 -2.5994E-08
S9 -5.3305E-02 1.2388E-02 -2.2815E-03 -2.7588E-03 1.7946E-03 -3.7699E-04 2.1735E-05 8.4914E-07 8.1684E-10
S10 -9.9136E-02 4.0105E-02 -2.0426E-02 6.2514E-03 -4.1326E-04 -4.3486E-04 1.7381E-04 -2.2779E-05 0.0000E+00
S11 -2.2426E-02 -1.2890E-03 -2.5531E-03 1.4135E-03 -7.9926E-04 2.1792E-04 -1.7138E-05 -2.0121E-07 -3.2140E-08
S12 -3.3264E-02 8.8672E-03 -6.7557E-03 2.9381E-03 -9.0464E-04 1.6814E-04 -1.1800E-05 -1.4099E-08 -2.4558E-08
S13 -6.9077E-02 -1.5093E-02 1.2533E-02 -3.9785E-03 6.8381E-04 -5.5319E-05 1.4116E-06 5.8440E-09 1.1043E-09
S14 -5.8063E-02 -8.2575E-03 8.7559E-03 -3.2731E-03 6.1252E-04 -5.3488E-05 1.5710E-06 1.0517E-08 7.3223E-10
S15 -5.7433E-02 3.2504E-02 -1.2430E-02 2.5058E-03 -2.6284E-04 1.3604E-05 -2.5004E-07 -1.4012E-09 -6.7699E-11
S16 -6.5914E-02 2.6093E-02 -8.1130E-03 1.5621E-03 -1.7443E-04 9.8446E-06 -1.9046E-07 1.3952E-09 -1.7426E-10
表6
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汇聚焦点偏离。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，其表示不同视场角对应的畸变大小值。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，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、第八透镜E8和滤光片E9。
第一透镜E1具有正光焦度，其物侧面S1为凸面，像侧面S2为凸面。第二透镜E2具有负光焦度，其物侧面S3为凸面，像侧面S4为凹面。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为凸面，像侧面S8为凹面。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。第八透镜E8具有负光焦度，其物侧面S15为凸面，像侧面S16为凹面。滤光片E9具有物侧面S17和像侧面S18。光学成像系统具有成像面S19，来自物体的光依序穿过各表面S1至S18并最终成像在成像面S19上。
在实施例4中，光学成像系统的总有效焦距f的值是7.80mm，第一透镜E1的物侧面S1至成像面S19的轴上距离TTL的值是8.90mm，成像面S19上有效像素区域对角线长的一半ImgH的值是3.43mm，以及最大视场角的一半Semi-FOV的值是21.59°，光学成像系统的光圈数Fno的值是1.15。
表7示出了实施例4的光学成像系统的基本参数表，其中，曲率半径、厚度/距离和焦距的单位均为毫米(mm)。表8示出了可用于实施例4中各非球面镜面S1至S16的高次项系数A 4、A 6、A 8、A 10、A 12、A 14、A 16、A 18、A 20和A 22，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。
Figure PCTCN2020117368-appb-000006
表7
Figure PCTCN2020117368-appb-000007
表8
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汇聚焦点偏离。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，其表示不同视场角对应的畸变大小值。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，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、第八透镜E8和滤光片E9。
第一透镜E1具有正光焦度，其物侧面S1为凸面，像侧面S2为凸面。第二透镜E2具有负光焦度，其物侧面S3为凸面，像侧面S4为凹面。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为凸面，像侧面S8为凹面。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。第八透镜E8具有负光焦度，其物侧面S15为凸面，像侧面S16为凹面。滤光片E9具有物侧面S17和像侧面S18。光学成像系统具有成像面S19，来自物体的光依序穿过各表面S1至S18并最终成像在成像面S19上。
在实施例5中，光学成像系统的总有效焦距f的值是7.70mm，第一透镜E1的物侧面S1至成像面S19的轴上距离TTL的值是8.90mm，成像面S19上有效像素区域对角线长的一半ImgH的值是3.43mm，以及最大视场角的一半Semi-FOV的值是21.60°，光学成像系统的光圈数Fno的值是1.12。
表9示出了实施例5的光学成像系统的基本参数表，其中，曲率半径、厚度/距离和焦 距的单位均为毫米(mm)。表10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。
Figure PCTCN2020117368-appb-000008
表9
Figure PCTCN2020117368-appb-000009
表10
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汇聚焦点偏离。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 同视场角对应的畸变大小值。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，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、第八透镜E8和滤光片E9。
第一透镜E1具有正光焦度，其物侧面S1为凸面，像侧面S2为凸面。第二透镜E2具有负光焦度，其物侧面S3为凸面，像侧面S4为凹面。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为凸面，像侧面S8为凹面。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。第八透镜E8具有负光焦度，其物侧面S15为凸面，像侧面S16为凹面。滤光片E9具有物侧面S17和像侧面S18。光学成像系统具有成像面S19，来自物体的光依序穿过各表面S1至S18并最终成像在成像面S19上。
在实施例6中，光学成像系统的总有效焦距f的值是7.70mm，第一透镜E1的物侧面S1至成像面S19的轴上距离TTL的值是8.90mm，成像面S19上有效像素区域对角线长的一半ImgH的值是3.43mm，以及最大视场角的一半Semi-FOV的值是21.57°，光学成像系统的光圈数Fno的值是1.12。
表11示出了实施例6的光学成像系统的基本参数表，其中，曲率半径、厚度/距离和焦距的单位均为毫米(mm)。表12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。
Figure PCTCN2020117368-appb-000010
Figure PCTCN2020117368-appb-000011
表11
Figure PCTCN2020117368-appb-000012
表12
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汇聚焦点偏离。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，其表示不同视场角对应的畸变大小值。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，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、第八透镜E8和滤光片E9。
第一透镜E1具有正光焦度，其物侧面S1为凸面，像侧面S2为凸面。第二透镜E2具有负光焦度，其物侧面S3为凸面，像侧面S4为凹面。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为凸面，像侧面S8为凹面。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。第八透镜E8具有负光焦度，其物侧面S15为凸面，像侧面S16为凹面。滤光片E9具有物侧面S17和像侧面S18。光学成像系统具有成像面S19，来自物体的光依序穿过各表面S1至S18并最终成像在成像面S19上。
在实施例7中，光学成像系统的总有效焦距f的值是7.70mm，第一透镜E1的物侧面S1 至成像面S19的轴上距离TTL的值是8.90mm，成像面S19上有效像素区域对角线长的一半ImgH的值是3.43mm，以及最大视场角的一半Semi-FOV的值是21.55°，光学成像系统的光圈数Fno的值是1.10。
表13示出了实施例7的光学成像系统的基本参数表，其中，曲率半径、厚度/距离和焦距的单位均为毫米(mm)。表14示出了可用于实施例7中各非球面镜面S1至S16的高次项系数A 4、A 6、A 8、A 10、A 12、A 14、A 16、A 18、A 20、A 22、A 24、A 26、A 28和A 30，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。
Figure PCTCN2020117368-appb-000013
表13
面号 A4 A6 A8 A10 A12 A14 A16
S1 3.3999E-02 -4.5617E+00 5.8706E+01 -4.9154E+02 2.7825E+03 -1.1021E+04 3.1116E+04
S2 7.7931E-01 -4.3444E-01 -4.8152E+00 1.1930E+02 -1.0602E+03 5.2396E+03 -1.6730E+04
S3 -8.4778E-01 -5.1861E-01 9.7952E+00 3.8569E+00 -3.0018E+02 1.6729E+03 -5.1804E+03
S4 -1.0192E+00 4.2120E+00 -3.6956E+01 2.3537E+02 -9.9271E+02 2.7551E+03 -4.8660E+03
S5 1.1053E-01 2.0061E+00 -6.7063E+00 1.0557E+01 -5.9042E+00 -1.2789E+01 5.8865E+01
S6 -2.4619E+00 9.6188E+00 -4.3032E+01 1.8959E+02 -5.5293E+02 5.7950E+02 2.4071E+03
S7 -5.1396E-01 1.4025E+00 -1.2234E+01 5.1298E+01 -1.4002E+02 2.5411E+02 -1.3235E+02
S8 1.7540E+00 -2.9687E+00 -2.6434E+00 1.4004E+01 -2.0434E+01 1.7297E+01 -2.1156E+01
S9 -5.9254E-01 -8.2620E-01 2.4357E+01 -2.4505E+02 1.4972E+03 -6.1944E+03 1.8036E+04
S10 -7.2317E-01 1.1913E+00 -5.6514E+00 4.5593E+01 -2.9907E+02 1.3481E+03 -4.2020E+03
S11 -2.2948E-01 -2.9089E-01 2.9147E+00 -2.1133E+01 9.4479E+01 -2.8471E+02 5.9488E+02
S12 -6.2762E-01 1.8587E+00 -2.1087E+01 1.6243E+02 -8.6209E+02 3.2224E+03 -8.6356E+03
S13 -1.4324E+00 -8.7245E+00 1.6306E+02 -1.9417E+03 1.3674E+04 -6.2209E+04 1.9350E+05
S14 -3.8311E+00 1.9332E+01 4.1407E+00 -1.3053E+03 1.0759E+04 -4.6891E+04 1.3124E+05
S15 -8.1918E+00 3.5010E+01 4.9587E+01 -1.9387E+03 1.3587E+04 -5.3573E+04 1.3795E+05
S16 -8.8064E+00 4.6558E+01 -2.1597E+02 6.9969E+02 -1.5425E+03 2.7672E+03 -6.3223E+03
面号 A18 A20 A22 A24 A26 A28 A30
S1 -6.3218E+04 9.2472E+04 -9.6377E+04 6.9752E+04 -3.3288E+04 9.4140E+03 -1.1944E+03
S2 3.6758E+04 -5.7034E+04 6.2705E+04 -4.7983E+04 2.4379E+04 -7.4086E+03 1.0205E+03
S3 1.0505E+04 -1.4602E+04 1.4024E+04 -9.1502E+03 .8691E+03 -9.5492E+02 1.0422E+02
S4 4.6049E+03 3.6498E+02 -7.4294E+03 1.0421E+04 -7.4419E+03 2.8455E+03 -4.6404E+02
S5 -1.5385E+02 2.8537E+02 -3.7557E+02 3.4117E+02 -2.0253E+02 7.0140E+01 -1.0596E+01
S6 -1.2698E+04 2.9974E+04 -4.3569E+04 4.1067E+04 -2.4565E+04 8.5035E+03 -1.3000E+03
S7 -8.1343E+02 2.7739E+03 -4.5598E+03 4.5053E+03 -2.7123E+03 9.1839E+02 -1.3416E+02
S8 4.8568E+01 -9.2487E+01 1.2587E+02 -1.1992E+02 7.5810E+01 -2.8539E+01 4.8353E+00
S9 -3.7575E+04 5.6208E+04 -5.9836E+04 4.4201E+04 -2.1517E+04 6.2026E+03 -8.0150E+02
S10 9.2210E+03 -1.4353E+04 1.5753E+04 -1.1912E+04 5.9033E+03 -1.7247E+03 2.2506E+02
S11 -8.7403E+02 9.0565E+02 -6.5573E+02 3.2356E+02 -1.0332E+02 1.9161E+01 -1.5556E+00
S12 1.6718E+04 -2.3327E+04 2.3157E+04 -1.5905E+04 7.1654E+03 -1.9009E+03 2.2468E+02
S13 -4.2316E+05 6.5668E+05 -7.1898E+05 5.4271E+05 -2.6866E+05 7.8481E+04 -1.0253E+04
S14 -2.5198E+05 3.4011E+05 -3.2313E+05 2.1185E+05 -9.1285E+04 2.3270E+04 -2.6586E+03
S15 -2.4468E+05 3.0503E+05 -2.6716E+05 1.6108E+05 -6.3667E+04 1.4844E+04 -1.5463E+03
S16 1.7259E+04 -3.6954E+04 5.3828E+04 -5.1789E+04 3.1700E+04 -1.1226E+04 1.7550E+03
表14
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汇聚焦点偏离。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，其表示不同视场角对应的畸变大小值。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，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、第八透镜E8和滤光片E9。
第一透镜E1具有正光焦度，其物侧面S1为凸面，像侧面S2为凸面。第二透镜E2具有负光焦度，其物侧面S3为凸面，像侧面S4为凹面。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为凸面，像侧面S8为凹面。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。第八透镜E8具有负光焦度，其物侧面S15为凸面，像侧面S16为凹面。滤光片E9具有物侧面S17和像侧面S18。光学成像系统具有成像面S19，来自物体的光依序穿过各表面S1至S18并最终成像在成像面S19上。
在实施例8中，光学成像系统的总有效焦距f的值是7.54mm，第一透镜E1的物侧面S1至成像面S19的轴上距离TTL的值是8.90mm，成像面S19上有效像素区域对角线长的一半ImgH的值是3.43mm，以及最大视场角的一半Semi-FOV的值是21.62°，光学成像系统的光圈数Fno的值是1.09。
表15示出了实施例8的光学成像系统的基本参数表，其中，曲率半径、厚度/距离和焦 距的单位均为毫米(mm)。表16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。
Figure PCTCN2020117368-appb-000014
表15
面号 A4 A6 A8 A10 A12 A14 A16
S1 -7.3865E-02 -1.6483E+00 1.8531E+01 -1.3164E+02 6.0227E+02 -1.8612E+03 3.9679E+03
S2 5.0698E-01 2.2386E+00 -3.1445E+01 2.9621E+02 -1.8191E+03 7.3812E+03 -2.0635E+04
S3 -1.0526E+00 3.3811E+00 -3.1889E+01 2.8952E+02 -1.6221E+03 5.9086E+03 -1.4750E+04
S4 -9.0869E-01 2.3005E+00 -1.0407E+01 -3.2674E+00 5.0273E+02 -3.9342E+03 1.6670E+04
S5 5.8249E-02 1.9409E+00 -6.1095E+00 9.4193E+00 -6.4479E+00 -4.9091E+00 3.3214E+01
S6 -1.9180E+00 5.3337E+00 -7.1515E-01 -1.2873E+02 1.0760E+03 -5.1580E+03 1.6515E+04
S7 -3.9032E-01 -5.3165E-01 1.3789E+01 -1.4948E+02 8.7553E+02 -3.3131E+03 8.7820E+03
S8 1.7116E+00 -2.8649E+00 -2.6254E+00 1.4086E+01 -2.4121E+01 3.8550E+01 -9.5615E+01
S9 -5.7776E-01 5.1598E-01 3.8711E+00 -5.7562E+01 3.6646E+02 -1.4762E+03 4.0705E+03
S10 -6.3096E-01 7.4882E-01 -8.3725E-01 8.7681E-01 -1.4007E+01 1.0065E+02 -3.7424E+02
S11 -2.4511E-01 2.6869E-01 -3.2856E+00 1.8931E+01 -7.1411E+01 1.8178E+02 -3.2544E+02
S12 -5.9406E-01 1.6965E+00 -2.3104E+01 1.9272E+02 -1.0553E+03 3.9829E+03 -1.0676E+04
S13 -1.1943E+00 -6.5193E+00 9.7068E+01 -1.2476E+03 9.3224E+03 -4.3862E+04 1.3887E+05
S14 -4.1751E+00 3.2346E+01 -1.6828E+02 3.1801E+01 3.9154E+03 -2.2643E+04 7.0232E+04
S15 -9.4808E+00 5.7621E+01 -1.6512E+02 -5.9520E+02 7.7456E+03 -3.5401E+04 9.6893E+04
S16 -8.8072E+00 3.5465E+01 -1.4632E+01 -1.0928E+03 8.2757E+03 -3.3239E+04 8.5845E+04
面号 A18 A20 A22 A24 A26 A28 A30
S1 -5.8727E+03 5.9646E+03 -4.0055E+03 1.6254E+03 -3.0061E+02 -1.7566E+01 1.1822E+01
S2 4.0820E+04 -5.7740E+04 5.8140E+04 -4.0759E+04 1.8933E+04 -5.2442E+03 6.5635E+02
S3 2.5914E+04 -3.2308E+04 2.8390E+04 -1.7161E+04 6.7757E+03 -1.5687E+03 1.6088E+02
S4 -4.5516E+04 8.4585E+04 -1.0853E+05 9.4921E+04 -5.4148E+04 1.8189E+04 -2.7324E+03
S5 -9.8541E+01 2.0197E+02 -2.9018E+02 2.8647E+02 -1.8513E+02 7.0433E+01 -1.1920E+01
S6 -3.6940E+04 5.8587E+04 -6.5668E+04 5.0884E+04 -2.5937E+04 7.8247E+03 -1.0584E+03
S7 -1.6824E+04 2.3441E+04 -2.3511E+04 1.6515E+04 -7.6965E+03 2.1329E+03 -2.6539E+02
S8 2.3675E+02 -4.4524E+02 6.1057E+02 -5.9347E+02 3.8702E+02 -1.5185E+02 2.7109E+01
S9 -7.9104E+03 1.0941E+04 -1.0711E+04 7.2486E+03 -3.2233E+03 8.4648E+02 -9.9366E+01
S10 8.6445E+02 -1.3244E+03 1.3705E+03 -9.4651E+02 4.1673E+02 -1.0524E+02 1.1506E+01
S11 4.2040E+02 -3.9632E+02 2.7143E+02 -1.3154E+02 4.2555E+01 -8.1737E+00 6.9630E-01
S12 2.0595E+04 -2.8607E+04 2.8276E+04 -1.9351E+04 8.6938E+03 -2.3022E+03 2.7186E+02
S13 -3.0583E+05 4.7431E+05 -5.1604E+05 3.8539E+05 -1.8812E+05 5.4046E+04 -6.9291E+03
S14 -1.4161E+05 1.9649E+05 -1.9023E+05 1.2684E+05 -5.5729E+04 1.4578E+04 -1.7266E+03
S15 -1.7694E+05 2.2368E+05 -1.9702E+05 1.1887E+05 -4.6868E+04 1.0879E+04 -1.1269E+03
S16 -1.5080E+05 1.8253E+05 -1.4979E+05 7.9028E+04 -2.3529E+04 2.5216E+03 2.3112E+02
表16
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汇聚焦点偏离。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，其表示不同视场角对应的畸变大小值。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。
综上，实施例1至实施例8分别满足表17中所示的关系。
条件式\实施例 1 2 3 4 5 6 7 8
DT81/DT11 0.87 0.83 0.76 0.80 0.79 0.79 0.75 0.75
SAG41/SAG31 0.57 0.56 0.55 0.47 0.54 0.54 0.53 0.49
R4/R3 0.55 0.55 0.61 0.61 0.57 0.57 0.57 0.60
DT51/DT41 0.90 0.85 0.85 0.85 0.82 0.83 0.84 0.84
|R1/f1| 0.60 0.60 0.57 0.57 0.59 0.58 0.57 0.57
(T56+T67+T78)/TTL 0.24 0.22 0.22 0.21 0.21 0.20 0.19 0.19
CT3/CT1 0.52 0.58 0.59 0.67 0.66 0.67 0.72 0.71
CT5/CT4 0.80 0.67 0.65 0.56 0.64 0.67 0.65 0.70
R13/f 0.57 0.53 0.49 0.60 0.58 0.75 0.71 0.78
TTL/f 1.09 1.13 1.13 1.14 1.16 1.16 1.16 1.18
|R10/R9| 0.81 0.85 0.81 0.82 0.82 0.80 0.79 0.79
表17
本申请还提供一种成像装置，其设置有电子感光元件以成像，其电子感光元件可以是感光耦合元件(Charge Coupled Device，CCD)或互补性氧化金属半导体元件(Complementary Metal Oxide Semiconductor，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，本申请中所涉及的保护范围，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本申请构思的情况下，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 (28)

  1. 光学成像系统，其特征在于，沿光轴由物侧至像侧依序包括：
    具有光焦度的第一透镜；
    具有负光焦度的第二透镜，其像侧面为凹面；
    具有光焦度的第三透镜；
    具有光焦度的第四透镜；
    具有光焦度的第五透镜，其物侧面为凸面；
    具有光焦度的第六透镜；
    具有光焦度的第七透镜，其物侧面为凸面；
    具有光焦度的第八透镜；
    所述光学成像系统的最大视场角的一半Semi-FOV满足Semi-FOV＜30°。
  2. 根据权利要求1所述的光学成像系统，其特征在于，所述第一透镜的像侧面为凸面。
  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与所述光学成像系统的入瞳直径EPD满足f/EPD≤1.3。
  4. 根据权利要求1所述的光学成像系统，其特征在于，所述第一透镜的物侧面的最大有效半口径DT11和所述第八透镜的物侧面的最大有效半口径DT81满足DT81/DT11≤0.87。
  5. 根据权利要求1所述的光学成像系统，其特征在于，所述第四透镜的物侧面和所述光轴的交点至所述第四透镜的物侧面的有效半径顶点的轴上距离SAG41与所述第三透镜的物侧面和所述光轴的交点至所述第三透镜的物侧面的有效半径顶点的轴上距离SAG31满足0.1＜SAG41/SAG31＜0.9。
  6. 根据权利要求1所述的光学成像系统，其特征在于，所述第二透镜的物侧面的曲率半径R3与所述第二透镜的像侧面的曲率半径R4满足0.2＜R4/R3＜0.8。
  7. 根据权利要求1所述的光学成像系统，其特征在于，所述第四透镜的物侧面的最大有效半口径DT41与所述第五透镜的物侧面的最大有效半口径DT51满足DT51/DT41＜1。
  8. 根据权利要求1所述的光学成像系统，其特征在于，所述第一透镜的物侧面的曲率半径R1与所述第一透镜的有效焦距f1满足|R1/f1|≤0.60。
  9. 根据权利要求1所述的光学成像系统，其特征在于，所述第五透镜和所述第六透镜在所述光轴上的间隔距离T56、所述第六透镜和所述第七透镜在所述光轴上的间隔距离T67、所述第七透镜和所述第八透镜在所述光轴上的间隔距离T78以及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间隔距离TTL满足0＜(T56+T67+T78)/TTL＜0.4。
  10. 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与所述第三透镜在所述光轴上的中心厚度CT3满足0.2＜CT3/CT1＜1.0。
  11. 根据权利要求1所述的光学成像系统，其特征在于，所述第四透镜在所述光轴上的中心厚度CT4与所述第五透镜在所述光轴上的中心厚度CT5满足0.3＜CT5/CT4＜1.0。
  12. 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与所述光学成像系统的总有效焦距f满足0.1＜R13/f＜1.0。
  13. 根据权利要求1所述的光学成像系统，其特征在于，所述第一透镜的物侧面至所述光学成像系统的成像面在所述光轴上的间隔距离TTL与所述光学成像系统的总有效焦距f满足TTL/f≤1.18。
  14. 根据权利要求1至13中任一项所述的光学成像系统，其特征在于，所述第五透镜的物侧面的曲率半径R9与所述第五透镜的像侧面的曲率半径R10满足0.5＜|R10/R9|＜1。
  15. 光学成像系统，其特征在于，沿光轴由物侧至像侧依序包括：
    具有光焦度的第一透镜，其像侧面为凸面；
    具有光焦度的第二透镜，其像侧面为凹面；
    具有光焦度的第三透镜；
    具有光焦度的第四透镜；
    具有光焦度的第五透镜；
    具有光焦度的第六透镜；
    具有光焦度的第七透镜，其物侧面为凸面；
    具有光焦度的第八透镜；
    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≤1.3。
  16. 根据权利要求15所述的光学成像系统，其特征在于，所述第五透镜的物侧面为凸面。
  17. 根据权利要求15所述的光学成像系统，其特征在于，所述第一透镜的物侧面的最大有效半口径DT11和所述第八透镜的物侧面的最大有效半口径DT81满足DT81/DT11≤0.87。
  18. 根据权利要求17所述的光学成像系统，其特征在于，所述光学成像系统的最大视场角的一半Semi-FOV满足Semi-FOV＜30°。
  19. 根据权利要求15所述的光学成像系统，其特征在于，所述第四透镜的物侧面和所述光轴的交点至所述第四透镜的物侧面的有效半径顶点的轴上距离SAG41与所述第三透镜的物侧面和所述光轴的交点至所述第三透镜的物侧面的有效半径顶点的轴上距离SAG31满足0.1＜SAG41/SAG31＜0.9。
  20. 根据权利要求15所述的光学成像系统，其特征在于，所述第二透镜的物侧面的曲率半径R3与所述第二透镜的像侧面的曲率半径R4满足0.2＜R4/R3＜0.8。
  21. 根据权利要求15所述的光学成像系统，其特征在于，所述第四透镜的物侧面的最大有效半口径DT41与所述第五透镜的物侧面的最大有效半口径DT51满足DT51/DT41＜1。
  22. 根据权利要求15所述的光学成像系统，其特征在于，所述第一透镜的物侧面的曲率半径R1与所述第一透镜的有效焦距f1满足|R1/f1|≤0.60。
  23. 根据权利要求15所述的光学成像系统，其特征在于，所述第五透镜和所述第六透镜在所述光轴上的间隔距离T56、所述第六透镜和所述第七透镜在所述光轴上的间隔距离T67、所述第七透镜和所述第八透镜在所述光轴上的间隔距离T78以及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间隔距离TTL满足0＜(T56+T67+T78)/TTL＜0.4。
  24. 根据权利要求15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与所述第三透镜在所述光轴上的中心厚度CT3满足0.2＜CT3/CT1＜1.0。
  25. 根据权利要求15所述的光学成像系统，其特征在于，所述第四透镜在所述光轴上的中心厚度CT4与所述第五透镜在所述光轴上的中心厚度CT5满足0.3＜CT5/CT4＜1.0。
  26. 根据权利要求15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与所述光学成像系统的总有效焦距f满足0.1＜R13/f＜1.0。
  27. 根据权利要求15所述的光学成像系统，其特征在于，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间隔距离TTL与所述光学成像系统的总有效焦距f满足TTL/f≤1.18。
  28. 根据权利要求15至27中任一项所述的光学成像系统，其特征在于，所述第五透镜的物侧面的曲率半径R9与所述第五透镜的像侧面的曲率半径R10满足0.5＜|R10/R9|＜1。
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