WO2020168717A1 - 光学成像镜头 - Google Patents

光学成像镜头 Download PDF

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Publication number
WO2020168717A1
WO2020168717A1 PCT/CN2019/108451 CN2019108451W WO2020168717A1 WO 2020168717 A1 WO2020168717 A1 WO 2020168717A1 CN 2019108451 W CN2019108451 W CN 2019108451W WO 2020168717 A1 WO2020168717 A1 WO 2020168717A1
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Prior art keywords
lens
optical imaging
imaging lens
object side
optical
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PCT/CN2019/108451
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English (en)
French (fr)
Inventor
耿晓婷
吕赛锋
邢天祥
李龙
戴付建
赵烈烽
Original Assignee
浙江舜宇光学有限公司
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Application filed by 浙江舜宇光学有限公司 filed Critical 浙江舜宇光学有限公司
Publication of WO2020168717A1 publication Critical patent/WO2020168717A1/zh
Priority to US17/235,893 priority Critical patent/US20210239947A1/en

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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
    • G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B9/00—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or -
    • G02B9/64—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having more than six components

Definitions

  • the present application relates to an optical imaging lens, and more specifically, to an optical imaging lens including seven lenses.
  • the present application provides an optical imaging lens suitable for portable electronic products, which 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 lens, which can include in order from the object side to the image side along the optical axis: a first lens with positive refractive power, and a concave image side surface; and a second lens with refractive power ,
  • the image side is concave; the third lens with refractive power; the fourth lens with refractive power; the fifth lens with positive refractive power; the sixth lens with refractive power, the object side is convex, image
  • the side surface is concave; and the seventh lens with refractive power has a concave surface on the object side.
  • the maximum half-field angle HFOV of the optical imaging lens and the total effective focal length f of the optical imaging lens may satisfy tan(HFOV)*f ⁇ 4.34mm.
  • the distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens on the optical axis and the effective focal length f1 of the first lens may satisfy 0.6 ⁇ TTL/f1 ⁇ 1.3.
  • the total effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens may satisfy f/EPD ⁇ 2.
  • the total effective focal length f of the optical imaging lens and the effective focal length f5 of the fifth lens may satisfy 0 ⁇ f/f5 ⁇ 1.
  • the total effective focal length f of the optical imaging lens and the effective focal length f7 of the seventh lens may satisfy 0.5 ⁇
  • the total effective focal length f of the optical imaging lens and the radius of curvature R13 of the object side surface of the seventh lens may satisfy -1.3 ⁇ R13/f ⁇ -0.3.
  • the radius of curvature R11 of the object side surface of the sixth lens and the radius of curvature R12 of the image side surface of the sixth lens may satisfy 0 ⁇
  • the center thickness CT6 of the sixth lens on the optical axis, the center thickness CT7 of the seventh lens on the optical axis, and the separation distance T67 between the sixth lens and the seventh lens on the optical axis may satisfy 0.8 ⁇ T67 /(CT6+CT7) ⁇ 1.5.
  • the radius of curvature R1 of the object side surface of the first lens and the radius of curvature R4 of the image side surface of the fourth lens may satisfy 0.2 ⁇ R1/R4 ⁇ 0.7.
  • the separation distance T12 between the first lens and the second lens on the optical axis and the separation distance T23 between the second lens and the third lens on the optical axis may satisfy 0 ⁇ T23/T12 ⁇ 0.7.
  • the maximum effective radius DT21 of the object side surface of the second lens and the maximum effective radius DT31 of the object side surface of the third lens may satisfy 1.01 ⁇ DT31/DT21 ⁇ 1.4.
  • the distance from the object side of the first lens to the imaging surface of the optical imaging lens on the optical axis is TTL and half the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens, ImgH, may satisfy TTL/ImgH ⁇ 1.33.
  • This application uses seven lenses. By reasonably distributing the refractive power, surface shape, center thickness of each lens, and on-axis distance between each lens, the above optical imaging lens has ultra-thin and high imaging quality. , At least one beneficial effect such as large aperture, long focal length, and ease of processing and manufacturing.
  • FIG. 1 shows a schematic structural diagram of an optical imaging lens according to Embodiment 1 of the present application
  • 2A to 2D respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens of Embodiment 1;
  • FIG. 3 shows a schematic structural diagram of an optical imaging lens according to Embodiment 2 of the present application
  • 4A to 4D respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens of Embodiment 2;
  • Fig. 5 shows a schematic structural diagram of an optical imaging lens according to Embodiment 3 of the present application
  • 6A to 6D respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens of Embodiment 3;
  • FIG. 7 shows a schematic structural diagram of an optical imaging lens according to Embodiment 4 of the present application.
  • 8A to 8D respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens of Embodiment 4;
  • FIG. 9 shows a schematic structural diagram of an optical imaging lens according to Embodiment 5 of the present application.
  • 10A to 10D respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens of Embodiment 5;
  • FIG. 11 shows a schematic structural diagram of an optical imaging lens according to Embodiment 6 of the present application.
  • 12A to 12D respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens of Embodiment 6;
  • FIG. 13 shows a schematic structural diagram of an optical imaging lens according to Embodiment 7 of the present application.
  • 14A to 14D respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens of Embodiment 7;
  • FIG. 15 shows a schematic structural diagram of an optical imaging lens according to Embodiment 8 of the present application.
  • 16A to 16D respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens of Example 8.
  • 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 lens according to the exemplary embodiment of the present application may include, for example, seven lenses having refractive power, namely, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a first lens. Seven lenses. The seven lenses are arranged in order from the object side to the image side along the optical axis. In the first lens to the seventh lens, there may be an air gap between any two adjacent lenses.
  • the first lens may have positive refractive power, and its image side surface may be concave; the second lens may have positive refractive power or negative refractive power, and its image side surface may be concave; and the third lens may have positive refractive power Or negative refractive power; the fourth lens has positive refractive power or negative refractive power; the fifth lens can have positive refractive power; the sixth lens has positive refractive power or negative refractive power, and its object side can be convex, image side It can be concave; the seventh lens has positive or negative refractive power, and its object side surface can be concave.
  • the first lens with positive refractive power and concave image side is responsible for light convergence. With the 6 lenses behind, the focal length can be maximized while maintaining good light convergence of the lens. At the same time, this arrangement also helps to reduce the size of the lens, enabling a lower ratio of TTL and f1.
  • the image side of the second lens is kept as a concave surface, and its function is similar to that of the first lens, so that light rays can converge when passing through the surface. At the same time, it also helps the system to minimize the TTL/f1 value under the premise of better imaging quality.
  • the object side surface of the first lens may be a convex surface.
  • the object side surface of the second lens may be a convex surface.
  • the seventh lens may have negative refractive power.
  • the optical imaging lens of the present application may satisfy the conditional formula tan(HFOV)*f ⁇ 4.34mm, where HFOV is the maximum half-field angle of the optical imaging lens, and f is the total effective focal length of the optical imaging lens . More specifically, HFOV and f may further satisfy 4.34mm ⁇ tan(HFOV)*f ⁇ 5.0mm, for example, 4.34mm ⁇ tan(HFOV)*f ⁇ 4.93mm. Satisfying the conditional formula tan(HFOV)*f ⁇ 4.34mm can make the lens have a wider imaging surface while maintaining the ultra-thin characteristics of the lens group, which helps to broaden the scope of use of the lens.
  • the optical imaging lens of the present application may satisfy the conditional expression 0.6 ⁇ TTL/f1 ⁇ 1.3, where TTL is the distance from the object side of the first lens to the imaging surface of the optical imaging lens on the optical axis, f1 Is the effective focal length of the first lens. More specifically, TTL and f1 may further satisfy 0.82 ⁇ TTL/f1 ⁇ 1.01. Controlling the ratio of TTL to f1 in a reasonable range can prevent the first lens from taking on too much power, which is helpful for the distribution of power of the lens group. With tan(HFOV)*f ⁇ 4.34mm, it can make the lens have a wider imaging surface while maintaining the ultra-thin characteristics of the lens group.
  • the optical imaging lens of the present application may satisfy the condition f/EPD ⁇ 2, where f is the total effective focal length of the optical imaging lens, and EPD is the entrance pupil diameter of the optical imaging lens. More specifically, f and EPD may further satisfy 1.66 ⁇ f/EPD ⁇ 2.00. Controlling the ratio range of f to EPD can effectively increase the amount of light through the lens and make it have a higher relative contrast, which can improve the imaging quality of the lens in a darker environment and make the lens more practical
  • the optical imaging lens of the present application may satisfy the conditional formula TTL/ImgH ⁇ 1.33, where TTL is the distance from the object side of the first lens to the imaging surface of the optical imaging lens on the optical axis, and ImgH is the optical axis. Half of the diagonal length of the effective pixel area on the imaging surface of the imaging lens. More specifically, TTL and ImgH can further satisfy 1.21 ⁇ TTL/ImgH ⁇ 1.33. Satisfying this conditional formula can effectively reduce the total size of the lens group, realize the ultra-thin characteristics and miniaturization of the lens group, so that the lens group can be better adapted to more and more ultra-thin electronic products on the market.
  • the optical imaging lens of the present application may satisfy the conditional expression 0 ⁇ f/f5 ⁇ 1, where f is the total effective focal length of the optical imaging lens, and f5 is the effective focal length of the fifth lens. More specifically, f and f5 may further satisfy 0.09 ⁇ f/f5 ⁇ 0.92.
  • f and f5 may further satisfy 0.09 ⁇ f/f5 ⁇ 0.92.
  • the optical imaging lens of the present application may satisfy the conditional expression 0.5 ⁇
  • the lens group can better correct system aberrations while maintaining ultra-thin characteristics, and is beneficial to balance the aberrations introduced by the first six lenses.
  • the optical imaging lens of the present application may satisfy the conditional expression -1.3 ⁇ R13/f ⁇ -0.3, where f is the total effective focal length of the optical imaging lens, and R13 is the radius of curvature of the object side of the seventh lens . More specifically, R13 and f may further satisfy -1.10 ⁇ R13/f ⁇ -0.69.
  • R13 and f may further satisfy -1.10 ⁇ R13/f ⁇ -0.69.
  • the optical imaging lens of the present application may satisfy the conditional expression 0 ⁇
  • the sixth lens With the convex-concave surface of the sixth lens, it can effectively make the sixth lens have a better condensing effect on the edge field of view light, thereby helping to improve the system image Quality, and help to improve the relative contrast of the system. At the same time, the sixth lens can maintain good processing technology and improve the practicability of the lens group.
  • the optical imaging lens of the present application may satisfy the conditional expression 0.8 ⁇ T67/(CT6+CT7) ⁇ 1.5, where CT6 is the center thickness of the sixth lens on the optical axis, and CT7 is the seventh lens on the optical axis.
  • the center thickness on the optical axis, T67 is the separation distance between the sixth lens and the seventh lens on the optical axis.
  • CT6, CT7, and T67 may further satisfy 1.01 ⁇ T67/(CT6+CT7) ⁇ 1.33.
  • the size of the system can be reduced and the effective focal length of the lens can be increased, so that the system has a lower TTL/EFL ratio; 4.
  • the gap between the sixth lens and the seventh lens can be reduced The risk of ghost images makes the lens have better imaging quality.
  • the optical imaging lens of the present application may satisfy the conditional expression 0.2 ⁇ R1/R4 ⁇ 0.7, where R1 is the curvature radius of the object side surface of the first lens, and R4 is the curvature radius of the image side surface of the fourth lens . More specifically, R1 and R4 may further satisfy 0.40 ⁇ R1/R4 ⁇ 0.61.
  • a reasonable allocation of R1 and R4 can effectively reduce the aberration of the entire system, reduce the sensitivity of the system, avoid the possibility of poor manufacturability due to too large f1, and avoid the fourth lens due to excessive inclination. High sensitivity helps to improve system yield.
  • the optical imaging lens of the present application may satisfy the conditional expression 0 ⁇ T23/T12 ⁇ 0.7, where T12 is the distance between the first lens and the second lens on the optical axis, and T23 is the second lens and The separation distance of the third lens on the optical axis. More specifically, T23 and T12 may further satisfy 0.28 ⁇ T23/T12 ⁇ 0.55. Controlling T23 and T12 in a reasonable range is beneficial to: 1. Reduce the size of the system and keep the lens ultra-thin; 2. Effectively reduce ghost images between the first lens, the second lens and the third lens The risk of the lens group has a better imaging quality; 3. Effectively reduce the distortion of the system.
  • the optical imaging lens of the present application may satisfy the conditional formula 1.01 ⁇ DT31/DT21 ⁇ 1.4, where DT21 is the maximum effective radius of the object side of the second lens, and DT31 is the maximum of the object side of the third lens. Effective radius. More specifically, DT21 and DT31 may further satisfy 1.01 ⁇ DT31/DT21 ⁇ 1.09. Satisfying the conditional formula 1.01 ⁇ DT31/DT21 ⁇ 1.4 will help: 1. Improve the height of the system imaging surface and increase the effective focal length of the system; 2. Make the system better balance the aberration of the intermediate field of view; 3. Improve The processability of the second lens and the third lens makes the lens group more practical.
  • the above-mentioned optical imaging lens may further include at least one diaphragm.
  • the diaphragm can be set at an appropriate position as required, for example, between the object side and the first lens.
  • the above-mentioned optical imaging lens may further include a filter for correcting color deviation and/or a protective glass for protecting the photosensitive element located on the imaging surface.
  • the optical imaging lens according to the above-mentioned embodiment of the present application may use multiple lenses, for example, the above-mentioned seven lenses.
  • the volume of the imaging lens can be effectively reduced, the sensitivity of the imaging lens is reduced, and the performance of the imaging lens is improved.
  • Processability makes the optical imaging lens more conducive to production and processing and can be applied to portable electronic products.
  • This application proposes a solution for a seven-piece lens, which has a smaller size and higher imaging quality, and can match a higher-pixel sensor and stronger image processing technology.
  • At least one of the mirror surfaces of each lens is an aspheric mirror surface, that is, the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens
  • At least one of the object side surface and the image side surface of each lens in 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 astigmatic aberration.
  • the use of aspheric lenses can eliminate as much as possible the aberrations that occur during imaging, thereby improving imaging quality.
  • 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, and the seventh lens are aspheric mirror surfaces.
  • the number of lenses constituting the optical imaging lens can be changed to obtain the various results and advantages described in this specification.
  • the optical imaging lens is not limited to including seven lenses. If necessary, the optical imaging lens may include other numbers of lenses.
  • FIG. 1 shows a schematic structural diagram of an optical imaging lens according to Embodiment 1 of the present application.
  • the optical imaging lens 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 filter E8 and the imaging surface S17.
  • the first lens E1 has a positive refractive power, the object side S1 is convex, and the image side S2 is concave.
  • the second lens E2 has negative refractive power, the object side surface S3 is a convex surface, and 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, and the image side surface S6 is a convex surface.
  • the fourth lens E4 has negative refractive power, the object side surface S7 is concave, and the image side surface S8 is convex.
  • the fifth lens E5 has a positive refractive 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 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 negative refractive power
  • the object side surface S13 is a concave surface
  • the 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 each surface S1 to S16 and is finally imaged on the imaging surface S17.
  • Table 1 shows the basic parameter table of the optical imaging lens of Embodiment 1, wherein the units of the radius of curvature, thickness and focal length are all millimeters (mm).
  • f is the total effective focal length of the optical imaging lens
  • Fno is the aperture value of the optical imaging lens
  • HFOV is the maximum half-field angle of the optical imaging lens
  • ImgH is half of the diagonal length of the effective pixel area on the imaging surface.
  • the object and image sides of any one of the first lens E1 to the seventh lens E7 are aspherical, and the surface shape x of each aspherical lens can be defined by but not limited to the following aspherical formula :
  • x is the distance vector height of the aspheric surface at a height 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 S1-S14 in Example 1. .
  • FIG. 2A shows the axial chromatic aberration curve of the optical imaging lens of Embodiment 1, which indicates the deviation of the focusing point of light of different wavelengths after passing through the lens.
  • 2B shows the astigmatism curve of the optical imaging lens of Example 1, which represents meridional field curvature and sagittal field curvature.
  • FIG. 2C shows a distortion curve of the optical imaging lens of Embodiment 1, which represents the distortion magnitude values corresponding to different image heights.
  • 2D shows the chromatic aberration curve of magnification of the optical imaging lens of Example 1, which represents the deviation of different image heights on the imaging surface after light passes through the lens. According to FIGS. 2A to 2D, it can be seen that the optical imaging lens provided in Embodiment 1 can achieve good imaging quality.
  • FIG. 3 shows a schematic structural diagram of an optical imaging lens according to Embodiment 2 of the present application.
  • the optical imaging lens 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 filter E8 and the imaging surface S17.
  • the first lens E1 has a positive refractive power, the object side S1 is convex, and the image side S2 is concave.
  • the second lens E2 has positive refractive power, the object side surface S3 is a convex surface, and the image side surface S4 is a concave surface.
  • the third lens E3 has positive refractive power, the object side surface S5 is concave, and the image side surface S6 is convex.
  • the fourth lens E4 has negative refractive power, the object side surface S7 is concave, and the image side surface S8 is convex.
  • the fifth lens E5 has a positive refractive power, the object side surface S9 is a convex surface, and the image side surface S10 is a convex surface.
  • the sixth lens E6 has a negative refractive power, the object side surface S11 is a convex surface, and the image side surface S12 is a concave surface.
  • the seventh lens E7 has negative refractive power, the object side surface S13 is a concave surface, and the 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 each surface S1 to S16 and is finally imaged on the imaging surface S17.
  • Table 3 shows the basic parameter table of the optical imaging lens of Embodiment 2, in which the units of the radius of curvature, thickness 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 axial chromatic aberration curve of the optical imaging lens of Embodiment 2, which represents the deviation of the focusing point of light of different wavelengths after passing through the lens.
  • 4B shows the astigmatism curve of the optical imaging lens of Example 2, which represents meridional field curvature and sagittal field curvature.
  • FIG. 4C shows a distortion curve of the optical imaging lens of Embodiment 2, which represents the distortion magnitude values corresponding to different image heights.
  • FIG. 4D shows the chromatic aberration curve of magnification of the optical imaging lens of Embodiment 2, which represents the deviation of different image heights on the imaging surface after light passes through the lens. It can be seen from FIGS. 4A to 4D that the optical imaging lens provided in Embodiment 2 can achieve good imaging quality.
  • FIG. 5 shows a schematic structural diagram of an optical imaging lens according to Embodiment 3 of the present application.
  • the optical imaging lens 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 filter E8 and the imaging surface S17.
  • the first lens E1 has a positive refractive power, the object side S1 is convex, and the image side S2 is concave.
  • the second lens E2 has negative refractive power, the object side surface S3 is a convex surface, and 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, and the image side surface S6 is a convex surface.
  • the fourth lens E4 has negative refractive power, the object side surface S7 is concave, and the image side surface S8 is convex.
  • the fifth lens E5 has a positive refractive power
  • the object side surface S9 is a convex surface
  • the image side surface S10 is a convex surface.
  • the sixth lens E6 has a negative 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 concave surface
  • the image side surface S14 is a convex surface.
  • the filter E8 has an object side surface S15 and an image side surface S16. The light from the object sequentially passes through each surface S1 to S16 and is finally imaged on the imaging surface S17.
  • Table 5 shows the basic parameter table of the optical imaging lens of Embodiment 3, wherein the units of the radius of curvature, thickness 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.
  • FIG. 6A shows the axial chromatic aberration curve of the optical imaging lens of Embodiment 3, which indicates the deviation of the focusing point of light of different wavelengths after passing through the lens.
  • 6B shows the astigmatism curve of the optical imaging lens of Example 3, which represents meridional field curvature and sagittal field curvature.
  • FIG. 6C shows a distortion curve of the optical imaging lens of Embodiment 3, which represents the distortion magnitude values corresponding to different image heights.
  • FIG. 6D shows the chromatic aberration curve of magnification of the optical imaging lens of Embodiment 3, which represents the deviation of different image heights on the imaging surface after light passes through the lens. According to FIGS. 6A to 6D, it can be known that the optical imaging lens provided in Embodiment 3 can achieve good imaging quality.
  • FIG. 7 shows a schematic structural diagram of an optical imaging lens according to Embodiment 4 of the present application.
  • the optical imaging lens 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 filter E8 and the imaging surface S17.
  • the first lens E1 has a positive refractive power, the object side S1 is convex, and the image side S2 is concave.
  • the second lens E2 has positive refractive power, the object side surface S3 is a convex surface, and the image side surface S4 is a concave surface.
  • the third lens E3 has a positive refractive power, the object side surface S5 is concave, and the image side surface S6 is convex.
  • the fourth lens E4 has negative refractive power, the object side surface S7 is concave, and the image side surface S8 is convex.
  • the fifth lens E5 has a positive refractive power, the object side surface S9 is a concave surface, and the image side surface S10 is a convex surface.
  • the sixth lens E6 has a positive refractive power, the object side surface S11 is a convex surface, and the image side surface S12 is a concave surface.
  • the seventh lens E7 has negative refractive power, the object side surface S13 is a concave surface, and the 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 each surface S1 to S16 and is finally imaged on the imaging surface S17.
  • Table 7 shows the basic parameter table of the optical imaging lens of Embodiment 4, wherein the units of the radius of curvature, thickness, and focal length are all millimeters (mm).
  • Table 8 shows the coefficients of higher-order terms that can be used for each aspheric mirror surface in Embodiment 4, where each aspheric surface type can be defined by the formula (1) given in Embodiment 1 above.
  • FIG. 8A shows the on-axis chromatic aberration curve of the optical imaging lens of Embodiment 4, which represents the deviation of the focusing point of light of different wavelengths after passing through the lens.
  • 8B shows the astigmatism curve of the optical imaging lens of Example 4, which represents meridional field curvature and sagittal field curvature.
  • FIG. 8C shows a distortion curve of the optical imaging lens of Embodiment 4, which represents the distortion magnitude values corresponding to different image heights.
  • FIG. 8D shows a chromatic aberration curve of magnification of the optical imaging lens of Embodiment 4, which represents the deviation of different image heights on the imaging surface after light passes through the lens. It can be seen from FIGS. 8A to 8D that the optical imaging lens provided in Embodiment 4 can achieve good imaging quality.
  • FIG. 9 shows a schematic structural diagram of an optical imaging lens according to Embodiment 5 of the present application.
  • the optical imaging lens 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 filter E8 and the imaging surface S17.
  • the first lens E1 has a positive refractive power, the object side S1 is convex, and the image side S2 is concave.
  • the second lens E2 has negative refractive power, the object side surface S3 is a convex surface, and 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, and the image side surface S6 is a convex surface.
  • the fourth lens E4 has a positive refractive power, 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 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 negative refractive power
  • the object side surface S13 is a concave surface
  • the 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 each surface S1 to S16 and is finally imaged on the imaging surface S17.
  • Table 9 shows the basic parameter table of the optical imaging lens of Embodiment 5, wherein the units of the radius of curvature, thickness 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 axial chromatic aberration curve of the optical imaging lens of Embodiment 5, which indicates the deviation of the focusing point of light of different wavelengths after passing through the lens.
  • 10B shows the astigmatism curve of the optical imaging lens of Example 5, which represents meridional field curvature and sagittal field curvature.
  • FIG. 10C shows a distortion curve of the optical imaging lens of Embodiment 5, which represents the distortion magnitude values corresponding to different image heights.
  • FIG. 10D shows the chromatic aberration curve of magnification of the optical imaging lens of Embodiment 5, which represents the deviation of different image heights on the imaging surface after light passes through the lens. It can be seen from FIGS. 10A to 10D that the optical imaging lens provided in Embodiment 5 can achieve good imaging quality.
  • FIG. 11 shows a schematic structural diagram of an optical imaging lens according to Embodiment 6 of the present application.
  • the optical imaging lens 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 filter E8 and the imaging surface S17.
  • the first lens E1 has a positive refractive power, the object side S1 is convex, and the image side S2 is concave.
  • the second lens E2 has negative refractive power, the object side surface S3 is a convex surface, and 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, and 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, and the image side surface S8 is a convex surface.
  • the fifth lens E5 has a positive 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 negative refractive power
  • the object side surface S13 is a concave surface
  • the 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 each surface S1 to S16 and is finally imaged on the imaging surface S17.
  • Table 11 shows the basic parameter table of the optical imaging lens of Example 6, wherein the units of the radius of curvature, thickness 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 axial chromatic aberration curve of the optical imaging lens of Embodiment 6, which represents the deviation of the focusing point of light of different wavelengths after passing through the lens.
  • 12B shows the astigmatism curve of the optical imaging lens of Example 6, which represents meridional field curvature and sagittal field curvature.
  • FIG. 12C shows the distortion curve of the optical imaging lens of Embodiment 6, which represents the distortion magnitude values corresponding to different image heights.
  • FIG. 12D shows the chromatic aberration curve of magnification of the optical imaging lens of Example 6, which represents the deviation of different image heights on the imaging surface after light passes through the lens. According to FIGS. 12A to 12D, it can be seen that the optical imaging lens given in Embodiment 6 can achieve good imaging quality.
  • FIG. 13 shows a schematic structural diagram of an optical imaging lens according to Embodiment 7 of the present application.
  • the optical imaging lens 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 filter E8 and the imaging surface S17.
  • the first lens E1 has a positive refractive power, the object side S1 is convex, and the image side S2 is concave.
  • the second lens E2 has negative refractive power, the object side surface S3 is a convex surface, and 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, and the image side surface S6 is a convex surface.
  • the fourth lens E4 has a positive refractive power, the object side surface S7 is a convex surface, and the image side surface S8 is a concave surface.
  • the fifth lens E5 has a positive refractive 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 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 negative refractive power
  • the object side surface S13 is a concave surface
  • the 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 each surface S1 to S16 and is finally imaged on the imaging surface S17.
  • Table 13 shows the basic parameter table of the optical imaging lens of Embodiment 7, wherein the units of the radius of curvature, thickness and focal length are all millimeters (mm).
  • Table 14 shows the coefficients of higher-order terms that can be used for each aspheric mirror surface in Embodiment 7, where each aspheric surface type can be defined by the formula (1) given in Embodiment 1 above.
  • FIG. 14A shows the axial chromatic aberration curve of the optical imaging lens of Example 7, which represents the deviation of the focusing point of light of different wavelengths after passing through the lens.
  • 14B shows the astigmatism curve of the optical imaging lens of Example 7, which represents meridional field curvature and sagittal field curvature.
  • FIG. 14C shows a distortion curve of the optical imaging lens of Embodiment 7, which represents the distortion magnitude values corresponding to different image heights.
  • FIG. 14D shows the chromatic aberration curve of magnification of the optical imaging lens of Example 7, which represents the deviation of different image heights on the imaging surface after light passes through the lens. It can be seen from FIGS. 14A to 14D that the optical imaging lens provided in Embodiment 7 can achieve good imaging quality.
  • FIG. 15 shows a schematic structural diagram of an optical imaging lens according to Embodiment 8 of the present application.
  • the optical imaging lens 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 filter E8 and the imaging surface S17.
  • the first lens E1 has a positive refractive power, the object side S1 is convex, and the image side S2 is concave.
  • the second lens E2 has negative refractive power, the object side surface S3 is a convex surface, and 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, and the image side surface S6 is a convex surface.
  • the fourth lens E4 has a positive refractive power, the object side surface S7 is a convex surface, and the image side surface S8 is a concave surface.
  • the fifth lens E5 has a positive refractive 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 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 negative refractive power
  • the object side surface S13 is a concave surface
  • the 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 each surface S1 to S16 and is finally imaged on the imaging surface S17.
  • Table 15 shows the basic parameter table of the optical imaging lens of Embodiment 8, wherein the units of the radius of curvature, thickness 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 axial chromatic aberration curve of the optical imaging lens of Example 8, which represents the deviation of the focusing point of light of different wavelengths after passing through the lens.
  • 16B shows the astigmatism curve of the optical imaging lens of Example 8, which represents meridional field curvature and sagittal field curvature.
  • FIG. 16C shows a distortion curve of the optical imaging lens of Embodiment 8, which represents the distortion magnitude values corresponding to different image heights.
  • 16D shows the chromatic aberration curve of magnification of the optical imaging lens of Example 8, which represents the deviation of different image heights on the imaging surface after light passes through the lens. According to FIGS. 16A to 16D, it can be seen that the optical imaging lens provided in Embodiment 8 can achieve good imaging quality.
  • Example 1 to Example 8 satisfy the relationship shown in Table 17 respectively.
  • the present application also provides an imaging device, the electronic photosensitive element of which may be a photosensitive coupling element (CCD) or a complementary metal oxide semiconductor element (CMOS).
  • the imaging device may be an independent imaging device such as a digital camera, or an imaging module integrated on a mobile electronic device such as a mobile phone.
  • the imaging device is equipped with the optical imaging lens described above.

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Abstract

一种光学成像镜头，其沿着光轴由物侧至像侧依序包括：具有正光焦度的第一透镜（E1），其像侧面（S2）为凹面；具有光焦度的第二透镜（E2），其像侧面（S4）为凹面；具有光焦度的第三透镜（E3）；具有光焦度的第四透镜（E4）；具有正光焦度的第五透镜（E5）；具有光焦度的第六透镜（E6），其物侧面（S11）为凸面，像侧面（S12）为凹面；以及具有光焦度的第七透镜（E7），其物侧面（S13）为凹面。其中，光学成像镜头的最大半视场角HFOV与光学成像镜头的总有效焦距f满足tan(HFOV)*f≥4.34mm。

Description

光学成像镜头
相关申请的交叉引用
本申请要求于2019年02月18日提交于中国国家知识产权局(CNIPA)的、专利申请号为201910123355.2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镜头，更具体地，涉及一种包括七片透镜的光学成像镜头。
背景技术
近些年来，便携式电子产品飞速发展，手机像素迅猛提升，市面上已经出现主摄像头像素高达4000万像素的手机。按照这样的发展速度，生产商设计出更高像质的手机迫在眉睫。理论上，通过增加镜头的镜片数，使用更多的镜片来平衡各种像差可以大幅度提升镜头的成像质量。但是，如果对镜片数量不加以限制，无疑会增加镜头尺寸，这和手机等便携式设备不断超薄化的趋势相悖。因此，如何在镜头尺寸保持不变甚至变得更小的情况下设计出具有更高成像质量、能够匹配更高像素的传感器和更强的图像处理技术的镜头成为目前亟需解决的问题。
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镜头。
本申请提供了这样一种光学成像镜头，其沿着光轴由物侧至像侧可依序包括：具有正光焦度的第一透镜，其像侧面为凹面；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；具有正光焦度的第五透镜；具有光焦度的第六透镜，其物侧面为凸面，像侧面为凹面；以及具有光焦度的第七透镜，其物侧面为凹面。
在一个实施方式中，光学成像镜头的最大半视场角HFOV与光学成像镜头的总有效焦距f可满足tan(HFOV)*f≥4.34mm。
在一个实施方式中，第一透镜的物侧面至光学成像镜头的成像面在光轴上的距离TTL与第一透镜的有效焦距f1可满足0.6＜TTL/f1＜1.3。
在一个实施方式中，光学成像镜头的总有效焦距f与光学成像镜头的入瞳直径EPD可满足f/EPD≤2。
在一个实施方式中，光学成像镜头的总有效焦距f与第五透镜的有效焦距f5可满足0＜f/f5＜1。
在一个实施方式中，光学成像镜头的总有效焦距f与第七透镜的有效焦距f7可满足0.5＜|f7/f|＜1.3。
在一个实施方式中，光学成像镜头的总有效焦距f与第七透镜的物侧面的曲率半径R13可满足-1.3＜R13/f＜-0.3。
在一个实施方式中，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＜|R11-R12|/|R11+R12|＜0.5。
在一个实施方式中，第六透镜在光轴上的中心厚度CT6、第七透镜在光轴上的中心厚度CT7与第六透镜和第七透镜在光轴上的间隔距离T67可满足0.8＜T67/(CT6+CT7)＜1.5。
在一个实施方式中，第一透镜的物侧面的曲率半径R1与第四透镜的像侧面的曲率半径R4可满足0.2＜R1/R4＜0.7。
在一个实施方式中，第一透镜和第二透镜在光轴上的间隔距离T12与第二透镜和第三透镜在光轴上的间隔距离T23可满足0＜T23/T12＜0.7。
在一个实施方式中，第二透镜的物侧面的最大有效半径DT21与第三透镜的物侧面的最大有效半径DT31可满足1.01≤DT31/DT21＜1.4。
在一个实施方式中，第一透镜的物侧面至光学成像镜头的成像面在光轴上的距离TTL与光学成像镜头的成像面上有效像素区域对角线长的一半ImgH可满足TTL/ImgH≤1.33。
本申请采用了七片透镜，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，使得上述光学成像镜头具有超薄化、高成像质量、大孔径、长焦距、便于加工制造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的光学成像镜头的结构示意图；
图2A至图2D分别示出了实施例1的光学成像镜头的轴上色差曲线、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的光学成像镜头的结构示意图；
图4A至图4D分别示出了实施例2的光学成像镜头的轴上色差曲线、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的光学成像镜头的结构示意图；
图6A至图6D分别示出了实施例3的光学成像镜头的轴上色差曲线、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的光学成像镜头的结构示意图；
图8A至图8D分别示出了实施例4的光学成像镜头的轴上色差曲线、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的光学成像镜头的结构示意图；
图10A至图10D分别示出了实施例5的光学成像镜头的轴上色差曲线、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的光学成像镜头的结构示意图；
图12A至图12D分别示出了实施例6的光学成像镜头的轴上色差曲线、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的光学成像镜头的结构示意图；
图14A至图14D分别示出了实施例7的光学成像镜头的轴上色差曲线、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的光学成像镜头的结构示意图；
图16A至图16D分别示出了实施例8的光学成像镜头的轴上色差曲线、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镜头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。在第一透镜至第七透镜中，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，其像侧面可为凹面；第二透镜具有正光焦度或负光焦度，其像侧面可为凹面；第三透镜具有正光焦度或负光焦度；第四透镜具有正光焦度或负光焦度；第五透镜可具有正光焦度；第六透镜具有正光焦度或负光焦度，其物侧面可为凸面，像侧面可为凹面；第七透镜具有正光焦度或负光焦度，其物侧面可为凹面。
具有正光焦度且像侧面为凹面的第一透镜，承担着光线会聚的作用，配合后面6片镜片，可以在保持镜头对光线具有良好汇聚性的前提下，最大程度地提升焦距。同时，这样的布置还有助于减小镜头尺寸，使得TTL和f1能够获得更低的比值。
第二透镜像侧面保持为凹面，其作用类似于第一片透镜，使光线在经过该面的时候有汇聚的作用。同时，也有助于***在具有较佳成像质量的前提下，最大限度地去降低TTL/f1值。
在示例性实施方式中，第一透镜的物侧面可为凸面。
在示例性实施方式中，第二透镜的物侧面可为凸面。
在示例性实施方式中，第七透镜可具有负光焦度。
在示例性实施方式中，本申请的光学成像镜头可满足条件式tan(HFOV)*f≥4.34mm，其中，HFOV为光学成像镜头的最大半视场角，f为光学成像镜头的总有效焦距。更具体地，HFOV和f进一步可满足4.34mm≤tan(HFOV)*f≤5.0mm，例如，4.34mm≤tan(HFOV)*f≤4.93mm。满足条件式tan(HFOV)*f≥4.34mm，可以在保持镜头组超薄的特性下，使得镜头拥有更广的成像面，有助于拓宽镜头的使用范围。
在示例性实施方式中，本申请的光学成像镜头可满足条件式0.6＜TTL/f1＜1.3，其中，TTL为第一透镜的物侧面至光学成像镜头的成像面在光轴上的距离，f1为第一透镜的有效焦距。更具体地，TTL和f1进一步可满足0.82≤TTL/f1≤1.01。将TTL和f1的比值控制在合理的范围可以避免第一透镜承担过多光焦度，有助于镜头组光焦度的分配。与tan(HFOV)*f≥4.34mm配合，可以在保持镜头组超薄的特性下，使得镜头拥有更广的成像面。
在示例性实施方式中，本申请的光学成像镜头可满足条件式f/EPD≤2，其中，f为光学成像镜头的总有效焦距，EPD为光学成像镜头的入瞳直径。更具体地，f和EPD进一步可满足1.66≤f/EPD≤2.00。控制f与EPD的比值范围，可以有效地增大镜头通光量，使其拥有较高的相对照度，可以很好的提升镜头在较暗环境下的成像质量，让镜头更具有实用性
在示例性实施方式中，本申请的光学成像镜头可满足条件式TTL/ImgH≤1.33，其中，TTL为第一透镜的物侧面至光学成像镜头的成像面在光轴上的距离，ImgH为光学成像镜头的成像面上有效像素区域对角线长的一半。更具体地，TTL和ImgH进一步可满足1.21≤TTL/ImgH≤1.33。满足该条件式，可以有效地缩小镜头组的总尺寸，实现镜头组的超薄特性和小型化，从而使得镜头组能够更好地适用于市场上愈来愈多的超薄电子产品。
在示例性实施方式中，本申请的光学成像镜头可满足条件式0＜f/f5＜1，其中，f为光学成像镜头的总有效焦距，f5为第五透镜的有效焦距。更具体地，f和f5进一步可满足0.09≤f/f5≤0.92。通过合理分配镜头组的有效焦距和第五透镜的有效焦距，能更加有效地缩减镜头组尺寸。同时，有利于在保持超薄特性的同时，避免***光焦度的过度集中，第五透镜与前四片透镜配合可使得***像差得到更好的校正。
在示例性实施方式中，本申请的光学成像镜头可满足条件式0.5＜|f7/f|＜1.3，其中，f为光学成像镜头的总有效焦距，f7为第七透镜的有效焦距。更具体地，f和f7进一步可满足0.78≤|f7/f|≤1.14。通过合理分配镜头组的有效焦距和第七透镜的有效焦距，可使得镜头组在保持超薄特性的同时，更好的校正***像差，并有利于平衡由前六片透镜引入的像差。
在示例性实施方式中，本申请的光学成像镜头可满足条件式-1.3＜R13/f＜-0.3，其中，f为光学成像镜头的总有效焦距，R13为第七透镜的物侧面的曲率半径。更具体地，R13和f进一步可满足-1.10≤R13/f≤-0.69。通过将***的总有效焦距和第七透镜物侧面的曲率半径比例控制在合理的范围，可以在保持***小型化的同时，使得其拥有较好的工艺性，方便后期加工量产，提升镜头实用性。除此之外，配合0.5＜|f7/f|＜1.3，可以使得中间视场和边缘视场的像差均得到有效地校正。
在示例性实施方式中，本申请的光学成像镜头可满足条件式0＜|R11-R12|/|R11+R12|＜0.5，其中，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，R11和R12进一步可满足0.03≤|R11-R12|/|R11+R12|≤0.36。有助于降低第六透镜口径附近的光焦度值，配合第六透镜的凸凹面型，可以有效地使第六透镜对边缘视场光线具 有更好的汇聚作用，从而有助于提升***像质，并且有助于提升***的相对照度。同时，能让第六透镜保持良好的加工工艺性，提升镜头组的实用性。
在示例性实施方式中，本申请的光学成像镜头可满足条件式0.8＜T67/(CT6+CT7)＜1.5，其中，CT6为第六透镜在光轴上的中心厚度，CT7为第七透镜在光轴上的中心厚度，T67为第六透镜和第七透镜在光轴上的间隔距离。更具体地，CT6、CT7和T67进一步可满足1.01≤T67/(CT6+CT7)≤1.33。通过合理控制第六、第七透镜的中厚和两透镜之间的空气间隙，有利于：1、使得镜头组可以更好的平衡***色差，有效地控制镜头的畸变量；2、有效地避免了由于第七透镜过薄而导致加工工艺困难；3、可以缩减***尺寸并提升镜头的有效焦距，使得***具有更低的TTL/EFL比值；4、降低第六透镜和第七透镜之间的鬼像风险，使镜头拥有更加优秀的成像质量。
在示例性实施方式中，本申请的光学成像镜头可满足条件式0.2＜R1/R4＜0.7，其中，R1为第一透镜的物侧面的曲率半径，R4为第四透镜的像侧面的曲率半径。更具体地，R1和R4进一步可满足0.40≤R1/R4≤0.61。合理分配R1和R4可以有效地减小整个***的像差，降低***的敏感性，避免由于f1过大而可能造成的工艺性太差，同时也避免了第四透镜由于倾角过大而造成较高的敏感性，有助于提升***良率。
在示例性实施方式中，本申请的光学成像镜头可满足条件式0＜T23/T12＜0.7，其中，T12为第一透镜和第二透镜在光轴上的间隔距离，T23为第二透镜和第三透镜在光轴上的间隔距离。更具体地，T23和T12进一步可满足0.28≤T23/T12≤0.55。将T23和T12控制在合理的范围，有利于：1、减小***的尺寸，使镜头保持超薄的特性；2、有效减小第一透镜和第二透镜以及第三透镜之间产生鬼像的风险，使得镜头组拥有更优质的成像质量；3、有效地降低了***的畸变量。
在示例性实施方式中，本申请的光学成像镜头可满足条件式1.01≤DT31/DT21＜1.4，其中，DT21为第二透镜的物侧面的最大有效半径，DT31为第三透镜的物侧面的最大有效半径。更具体地，DT21和DT31进一步可满足1.01≤DT31/DT21≤1.09。满足条件式1.01≤DT31/DT21＜1.4，有助于：1、提升***成像面的高度，并且提升***的有效焦距；2、使得***能够更好地平衡中间视场的像差；3、提升第二透镜和第三透镜的工艺加工性，使得镜头组具有更高的实用性。
在示例性实施方式中，上述光学成像镜头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，上述光学成像镜头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镜头可采用多片镜片，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，可有效地缩小成像镜头的体积、降低成像镜头的敏感度并提高成像镜头的可加工性，使得光学成像镜头更有利于生产加工并且可适用于便携式电子产品。本申请提出了一种七片式镜头的解决方案，该镜头具有较小的尺寸和较高的成像质量，能够匹配更高像素的传感器和更强的图像处理技术。
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、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。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、第六透镜和第七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镜头的透镜数量，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，但是该光学成像镜头不限于包括七个透镜。如果需要，该光学成像镜头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镜头的具体实施例。
实施例1
以下参照图1至图2D描述根据本申请实施例1的光学成像镜头。图1示出了根据本申请实施例1的光学成像镜头的结构示意图。
如图1所示，光学成像镜头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为凸面。第四透镜E4具有负光焦度，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为凹面，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的光学成像镜头的基本参数表，其中，曲率半径、厚度和焦距的单位均为毫米(mm)。
Figure PCTCN2019108451-appb-000001
Figure PCTCN2019108451-appb-000002
表1
其中，f为光学成像镜头的总有效焦距，Fno为光学成像镜头的光圈值，HFOV为光学成像镜头的最大半视场角，ImgH为成像面上有效像素区域对角线长的一半。
在实施例1中，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，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 PCTCN2019108451-appb-000003
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-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 -4.8762E-03 7.4205E-03 -1.8032E-02 2.0414E-02 -1.4879E-03 -1.9219E-02 1.9478E-02 -8.0047E-03 1.2428E-03
S2 -1.1238E-02 -2.7533E-02 1.2530E-01 -3.0985E-01 4.6231E-01 -4.2213E-01 2.3000E-01 -6.8312E-02 8.4453E-03
S3 -9.4076E-02 2.1330E-02 -7.2566E-02 1.7203E-01 -2.1528E-01 1.7086E-01 -8.7177E-02 2.6079E-02 -3.5664E-03
S4 -7.9834E-02 4.7139E-03 -1.0794E-03 -1.8864E-02 9.1408E-02 -1.2393E-01 8.1606E-02 -2.7215E-02 3.6004E-03
S5 1.8516E-03 1.6008E-02 -5.9140E-02 1.2229E-01 -1.6218E-01 1.4696E-01 -8.5976E-02 2.9296E-02 -4.3566E-03
S6 -1.8125E-02 3.6417E-03 4.3681E-02 -9.7294E-02 1.2502E-01 -1.0205E-01 5.0656E-02 -1.3789E-02 1.7353E-03
S7 -6.5384E-02 1.6703E-02 -2.9895E-02 1.1066E-01 -1.7897E-01 1.5912E-01 -8.3172E-02 2.3972E-02 -2.9227E-03
S8 -5.6700E-02 -3.9666E-02 1.0471E-01 -1.1920E-01 8.9672E-02 -4.4574E-02 1.3666E-02 -2.2440E-03 1.4342E-04
S9 1.7896E-02 -7.5224E-02 9.1297E-02 -7.7054E-02 4.4029E-02 -1.6966E-02 4.1026E-03 -5.4192E-04 2.9195E-05
S10 1.4225E-02 -1.9184E-02 1.4197E-02 -7.0583E-03 1.8144E-03 -2.8710E-04 6.3263E-05 -1.3581E-05 1.1295E-06
S11 -1.7088E-02 -1.5633E-02 7.4150E-03 -1.7649E-03 1.8357E-05 1.0409E-04 -2.6123E-05 2.7023E-06 -1.0589E-07
S12 1.8057E-02 -3.2062E-02 1.4546E-02 -4.2370E-03 8.1907E-04 -1.0229E-04 7.8817E-06 -3.3982E-07 6.2552E-09
S13 9.7692E-03 -1.6774E-02 5.5153E-03 -7.4768E-04 4.3864E-05 -2.0693E-08 -1.2055E-07 4.3218E-09 -1.3250E-11
S14 -3.3666E-03 -1.0555E-02 4.0499E-03 -9.7740E-04 1.6788E-04 -1.9028E-05 1.3150E-06 -4.9840E-08 7.9178E-10
表2
图2A示出了实施例1的光学成像镜头的轴上色差曲线，其表示不同波长的光线经由镜头后的会聚焦点偏离。图2B示出了实施例1的光学成像镜头的象散曲线，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的光学成像镜头的畸变曲线，其表示不同像高对应的畸变大小值。图2D示出了实施例1的光学成像镜头的倍率色差曲线，其表示光线经由镜头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所给出的光学成像镜头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的光学成像镜头。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的光学成像镜头的结构示意图。
如图3所示，光学成像镜头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具有正光焦度，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为凹面，像侧面S6为凸面。第四透镜E4具有负光焦度，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为凸面，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为凹面，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3示出了实施例2的光学成像镜头的基本参数表，其中，曲率半径、厚度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 PCTCN2019108451-appb-000004
表3
面号 A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 -6.9220E-03 1.8797E-02 -6.5978E-02 1.2521E-01 -1.2946E-01 6.8384E-02 -1.0601E-02 -4.8453E-03 1.6891E-03
S2 -1.3530E-02 -3.5778E-02 1.4301E-01 -3.2839E-01 4.4203E-01 -3.3504E-01 1.2574E-01 -1.1743E-02 -3.3928E-03
S3 -9.3508E-02 9.9802E-03 -1.8535E-01 5.1592E-01 -8.0703E-01 8.4940E-01 -5.7519E-01 2.2236E-01 -3.7429E-02
S4 -5.5452E-02 -5.9281E-02 1.5631E-01 -4.6261E-01 9.1891E-01 -1.0465E+00 6.8766E-01 -2.4370E-01 3.5704E-02
S5 3.3688E-02 3.4050E-03 2.2580E-02 -1.5021E-01 3.3237E-01 -3.8953E-01 2.5344E-01 -8.2929E-02 1.0253E-02
S6 -2.9809E-02 2.3245E-02 -1.5962E-02 8.5374E-02 -2.6692E-01 4.0686E-01 -3.3914E-01 1.4833E-01 -2.6029E-02
S7 -6.9750E-02 3.8655E-02 -1.1014E-01 3.2148E-01 -5.4601E-01 5.4663E-01 -3.2562E-01 1.0750E-01 -1.5093E-02
S8 -6.9448E-02 -3.5400E-02 1.2423E-01 -1.7851E-01 1.6399E-01 -9.7235E-02 3.5772E-02 -7.3165E-03 6.2683E-04
S9 2.6563E-02 -4.4213E-02 5.8923E-02 -5.6057E-02 3.2982E-02 -1.2338E-02 2.8438E-03 -3.6905E-04 2.0786E-05
S10 2.6215E-02 -4.7472E-03 1.4304E-02 -1.7224E-02 9.3204E-03 -2.9198E-03 5.4765E-04 -5.7156E-05 2.5568E-06
S11 -1.6852E-02 -1.9786E-02 1.0506E-02 -2.9203E-03 4.6410E-04 -3.2704E-05 -1.2425E-06 3.5792E-07 -1.6908E-08
S12 1.1740E-03 -3.0690E-02 1.6154E-02 -4.9877E-03 1.0018E-03 -1.2884E-04 1.0144E-05 -4.4410E-07 8.2747E-09
S13 6.6498E-03 -2.4500E-02 9.6657E-03 -1.4892E-03 7.6480E-05 6.5346E-06 -1.1681E-06 6.4066E-08 -1.2740E-09
S14 -1.4096E-02 -9.4011E-03 3.7642E-03 -6.6662E-04 7.6204E-05 -6.3863E-06 3.8241E-07 -1.4015E-08 2.2654E-10
表4
图4A示出了实施例2的光学成像镜头的轴上色差曲线，其表示不同波长的光线经由镜头后的会聚焦点偏离。图4B示出了实施例2的光学成像镜头的象散曲线，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的光学成像镜头的畸变曲线，其表示不同像高对应的畸变大小值。图4D示出了实施例2的光学成像镜头的倍率色差曲线，其表示光线经由镜头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所给出的光学成像镜头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的光学成像镜头。图5示出了根据本申请实施例3的光学成像镜头的结构示意图。
如图5所示，光学成像镜头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为凸面。第四透镜E4具有负光焦度，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为凸面，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为凹面，像侧面S14为凸面。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5示出了实施例3的光学成像镜头的基本参数表，其中，曲率半径、厚度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 PCTCN2019108451-appb-000005
Figure PCTCN2019108451-appb-000006
表5
面号 A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 -4.8664E-03 -2.8925E-03 1.2974E-02 -3.2017E-02 5.3838E-02 -5.5334E-02 3.2888E-02 -1.0219E-02 1.2604E-03
S2 -1.1626E-02 -4.3390E-02 1.9539E-01 -4.8488E-01 7.2849E-01 -6.7133E-01 3.6931E-01 -1.1089E-01 1.3876E-02
S3 -8.1632E-02 -6.0587E-03 -5.3651E-03 7.1243E-02 -1.5741E-01 1.8687E-01 -1.2711E-01 4.6173E-02 -7.0589E-03
S4 -7.2079E-02 -3.2309E-03 -2.8217E-02 1.0753E-01 -1.5381E-01 1.3619E-01 -7.5451E-02 2.3372E-02 -3.1274E-03
S5 -5.4320E-03 1.0978E-02 -8.5857E-02 1.9161E-01 -2.3774E-01 1.8822E-01 -9.3570E-02 2.7248E-02 -3.5904E-03
S6 -1.8450E-02 -1.9538E-02 9.2408E-02 -1.8334E-01 2.1676E-01 -1.4893E-01 5.2866E-02 -6.2305E-03 -4.5696E-04
S7 -2.5005E-02 -1.3296E-01 4.4128E-01 -7.5330E-01 8.2776E-01 -5.9061E-01 2.5954E-01 -6.3163E-02 6.4831E-03
S8 -8.8758E-02 -1.8051E-03 8.1985E-02 -1.0869E-01 9.6908E-02 -6.1203E-02 2.4435E-02 -5.3608E-03 4.8984E-04
S9 -2.7254E-02 -6.9672E-03 -1.6840E-03 1.8041E-02 -1.9265E-02 9.7839E-03 -2.8416E-03 4.6572E-04 -3.3303E-05
S10 -2.2137E-02 3.2554E-02 -4.8158E-02 3.9056E-02 -1.8757E-02 5.4699E-03 -9.5860E-04 9.5454E-05 -4.3001E-06
S11 -3.2521E-02 -1.5122E-02 2.0028E-02 -2.0162E-02 1.1197E-02 -3.5303E-03 6.3422E-04 -6.0255E-05 2.3463E-06
S12 -2.4738E-02 6.5119E-03 -1.2699E-02 7.3995E-03 -2.2657E-03 4.0902E-04 -4.3180E-05 2.4474E-06 -5.7144E-08
S13 -3.5482E-02 1.7490E-02 -4.9314E-03 1.3802E-03 -2.9504E-04 4.0866E-05 -3.4578E-06 1.6332E-07 -3.3116E-09
S14 -2.7084E-02 8.5246E-03 -2.5716E-03 7.4588E-04 -1.4786E-04 1.7863E-05 -1.2667E-06 4.8683E-08 -7.8598E-10
表6
图6A示出了实施例3的光学成像镜头的轴上色差曲线，其表示不同波长的光线经由镜头后的会聚焦点偏离。图6B示出了实施例3的光学成像镜头的象散曲线，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的光学成像镜头的畸变曲线，其表示不同像高对应的畸变大小值。图6D示出了实施例3的光学成像镜头的倍率色差曲线，其表示光线经由镜头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所给出的光学成像镜头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的光学成像镜头。图7示出了根据本申请实施例4的光学成像镜头的结构示意图。
如图7所示，光学成像镜头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具有正光焦度，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为凹面，像侧面S6为凸面。第四透镜E4具有负光焦度，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为凹面，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4的光学成像镜头的基本参数表，其中，曲率半径、厚度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 PCTCN2019108451-appb-000007
Figure PCTCN2019108451-appb-000008
表7
面号 A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 -6.9970E-03 1.6579E-02 -6.4940E-02 1.4062E-01 -1.7804E-01 1.3455E-01 -5.8346E-02 1.2969E-02 -1.0303E-03
S2 -1.7547E-02 -3.4413E-02 1.5492E-01 -3.9478E-01 5.9935E-01 -5.3807E-01 2.7350E-01 -6.8621E-02 5.5634E-03
S3 -9.4312E-02 1.2733E-02 -1.9705E-01 5.7364E-01 -9.5188E-01 1.0487E+00 -7.3271E-01 2.8969E-01 -4.9588E-02
S4 -6.2496E-02 -6.3174E-02 1.7799E-01 -5.3108E-01 1.0756E+00 -1.2625E+00 8.5875E-01 -3.1600E-01 4.8168E-02
S5 2.1209E-02 -2.0850E-03 3.5558E-02 -1.5703E-01 3.3935E-01 -3.9710E-01 2.5689E-01 -8.1887E-02 9.3602E-03
S6 -3.1371E-02 3.7085E-02 -1.1401E-01 3.8417E-01 -7.9824E-01 9.9474E-01 -7.3710E-01 2.9928E-01 -5.0229E-02
S7 -7.3168E-02 5.1194E-02 -1.5707E-01 4.9876E-01 -9.0352E-01 9.6753E-01 -6.2035E-01 2.2147E-01 -3.3775E-02
S8 -6.2021E-02 -5.2886E-02 1.7572E-01 -2.5602E-01 2.5203E-01 -1.6641E-01 6.9237E-02 -1.6047E-02 1.5541E-03
S9 3.5044E-02 -1.0639E-01 1.4899E-01 -1.5138E-01 1.0657E-01 -5.1495E-02 1.6050E-02 -2.8786E-03 2.2578E-04
S10 2.0766E-02 -2.6001E-02 2.6488E-02 -1.9597E-02 8.7226E-03 -2.6016E-03 5.5214E-04 -7.7167E-05 5.1454E-06
S11 -3.2012E-02 -1.6769E-02 1.0716E-02 -3.0231E-03 3.8638E-05 2.2875E-04 -6.5501E-05 7.7546E-06 -3.4810E-07
S12 1.6675E-02 -4.3285E-02 2.3297E-02 -7.8608E-03 1.7429E-03 -2.4800E-04 2.1670E-05 -1.0565E-06 2.1981E-08
S13 9.9941E-03 -2.3687E-02 8.8060E-03 -1.2839E-03 5.7151E-05 6.9550E-06 -1.1274E-06 6.2123E-08 -1.2696E-09
S14 -1.1094E-02 -1.0016E-02 4.3420E-03 -1.0323E-03 1.7831E-04 -2.1665E-05 1.6671E-06 -7.1321E-08 1.2815E-09
表8
图8A示出了实施例4的光学成像镜头的轴上色差曲线，其表示不同波长的光线经由镜头后的会聚焦点偏离。图8B示出了实施例4的光学成像镜头的象散曲线，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的光学成像镜头的畸变曲线，其表示不同像高对应的畸变大小值。图8D示出了实施例4的光学成像镜头的倍率色差曲线，其表示光线经由镜头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所给出的光学成像镜头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的光学成像镜头。图9示出了根据本申请实施例5的光学成像镜头的结构示意图。
如图9所示，光学成像镜头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具有正光焦度，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为凹面，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9示出了实施例5的光学成像镜头的基本参数表，其中，曲率半径、厚度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 PCTCN2019108451-appb-000009
表9
面号 A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 -1.2012E-02 4.9912E-02 -1.8005E-01 3.6625E-01 -4.3771E-01 3.0536E-01 -1.1475E-01 1.8029E-02 1.4586E-05
S2 -7.5971E-03 -9.0035E-02 4.1786E-01 -1.1531E+00 1.9514E+00 -2.0407E+00 1.2890E+00 -4.5028E-01 6.6819E-02
S3 -6.7389E-02 -1.5797E-02 6.2454E-02 -2.2484E-01 5.1337E-01 -6.3782E-01 4.4814E-01 -1.6941E-01 2.6671E-02
S4 -4.5204E-02 -3.9941E-02 1.3503E-01 -3.4637E-01 6.0052E-01 -6.0429E-01 3.5422E-01 -1.1399E-01 1.5495E-02
S5 2.9441E-03 1.9107E-02 -1.1025E-01 2.6282E-01 -4.0721E-01 4.0857E-01 -2.4664E-01 8.1863E-02 -1.1472E-02
S6 -4.2475E-02 -6.7218E-03 1.9866E-02 7.1734E-03 -3.9361E-02 2.9812E-02 -2.8086E-03 -5.5137E-03 1.9602E-03
S7 -5.8945E-02 -2.5185E-02 -2.3433E-02 2.1933E-01 -3.5960E-01 3.1708E-01 -1.6483E-01 4.7249E-02 -5.7785E-03
S8 -4.7425E-02 2.6956E-02 -1.2618E-01 2.6713E-01 -2.9300E-01 1.9347E-01 -7.6821E-02 1.6906E-02 -1.5943E-03
S9 -4.0900E-02 7.5937E-02 -1.2013E-01 1.3318E-01 -1.0422E-01 5.3476E-02 -1.7008E-02 3.0401E-03 -2.3231E-04
S10 -6.6235E-02 6.9186E-02 -6.4061E-02 5.1450E-02 -3.2456E-02 1.3741E-02 -3.5711E-03 5.1389E-04 -3.1343E-05
S11 -2.4536E-02 8.3653E-04 -1.1507E-02 7.0366E-03 -3.4415E-03 1.4307E-03 -3.9772E-04 6.0362E-05 -3.6926E-06
S12 2.6312E-02 -8.4589E-03 -1.2367E-02 8.4804E-03 -2.6882E-03 5.0150E-04 -5.6315E-05 3.5410E-06 -9.6203E-08
S13 -4.1176E-02 1.7394E-02 -5.1908E-03 1.4285E-03 -2.9223E-04 3.9611E-05 -3.3117E-06 1.5388E-07 -3.0442E-09
S14 -2.7061E-02 2.9021E-03 3.0218E-04 -4.1879E-04 1.3581E-04 -2.1960E-05 1.9241E-06 -8.7348E-08 1.6144E-09
表10
图10A示出了实施例5的光学成像镜头的轴上色差曲线，其表示不同波长的光线经由镜头后的会聚焦点偏离。图10B示出了实施例5的光学成像镜头的象散曲线，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的光学成像镜头的畸变曲线，其表示不同像高对应的畸变大小值。图10D示出了实施例5的光学成像镜头的倍率色差曲线，其表示光线经由镜头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所给出的光学成像镜头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的光学成像镜头。图11示出了根据本申请实施例6的光学成像镜头的结构示意图。
如图11所示，光学成像镜头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为凸面。第五透镜E5具有正光焦度，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为凹面，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11示出了实施例6的光学成像镜头的基本参数表，其中，曲率半径、厚度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 PCTCN2019108451-appb-000010
Figure PCTCN2019108451-appb-000011
表11
面号 A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 -1.2072E-02 5.1783E-02 -1.9401E-01 4.1289E-01 -5.2285E-01 3.9347E-01 -1.6429E-01 3.1330E-02 -1.0429E-03
S2 -1.3377E-02 -6.7076E-02 3.1562E-01 -8.8748E-01 1.5319E+00 -1.6236E+00 1.0358E+00 -3.6513E-01 5.4909E-02
S3 -7.7424E-02 5.0326E-03 -7.4194E-02 2.1316E-01 -2.8236E-01 2.5680E-01 -1.6180E-01 5.9894E-02 -9.6832E-03
S4 -4.5536E-02 -5.8935E-02 1.9213E-01 -4.6466E-01 7.5146E-01 -7.0004E-01 3.7051E-01 -1.0438E-01 1.1947E-02
S5 4.2183E-03 2.6869E-02 -1.2481E-01 2.9701E-01 -4.9753E-01 5.3672E-01 -3.4032E-01 1.1676E-01 -1.6796E-02
S6 -5.9552E-02 1.6165E-02 -8.3424E-03 4.9366E-02 -8.3357E-02 5.7546E-02 -1.2974E-02 -3.4329E-03 1.8097E-03
S7 -6.3398E-02 -3.6572E-02 -2.9332E-02 3.1204E-01 -5.3177E-01 4.8434E-01 -2.6187E-01 7.8695E-02 -1.0115E-02
S8 -5.4375E-02 2.1603E-02 -9.0704E-02 2.2422E-01 -2.6516E-01 1.8372E-01 -7.5854E-02 1.7282E-02 -1.6811E-03
S9 -4.2543E-02 7.3184E-02 -1.0628E-01 1.1749E-01 -9.4207E-02 4.9599E-02 -1.6106E-02 2.9253E-03 -2.2656E-04
S10 -5.4781E-02 6.1263E-02 -5.9615E-02 4.9300E-02 -3.1253E-02 1.3207E-02 -3.4319E-03 4.9523E-04 -3.0325E-05
S11 -2.4469E-02 4.5249E-03 -1.0217E-02 3.9906E-03 -8.5009E-04 1.9617E-04 -6.2926E-05 1.2166E-05 -8.5831E-07
S12 1.5761E-02 -3.8616E-03 -1.0672E-02 6.4433E-03 -1.8751E-03 3.2428E-04 -3.3942E-05 1.9995E-06 -5.1211E-08
S13 -4.0618E-02 1.8999E-02 -6.8139E-03 2.3248E-03 -5.7105E-04 9.0414E-05 -8.7087E-06 4.6389E-07 -1.0493E-08
S14 -3.6950E-02 1.0175E-02 -2.7906E-03 5.5059E-04 -6.6515E-05 4.0421E-06 -4.3017E-08 -6.5861E-09 2.1657E-10
表12
图12A示出了实施例6的光学成像镜头的轴上色差曲线，其表示不同波长的光线经由镜头后的会聚焦点偏离。图12B示出了实施例6的光学成像镜头的象散曲线，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的光学成像镜头的畸变曲线，其表示不同像高对应的畸变大小值。图12D示出了实施例6的光学成像镜头的倍率色差曲线，其表示光线经由镜头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所给出的光学成像镜头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的光学成像镜头。图13示出了根据本申请实施例7的光学成像镜头的结构示意图。
如图13所示，光学成像镜头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为凸面。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为凹面，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7的光学成像镜头的基本参数表，其中，曲率半径、厚度和焦距的 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 PCTCN2019108451-appb-000012
表13
面号 A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 -9.3729E-03 2.7810E-02 -8.4339E-02 1.3604E-01 -1.2044E-01 5.0103E-02 1.1294E-04 -7.2832E-03 1.7870E-03
S2 -1.5521E-02 -4.7637E-02 1.8647E-01 -4.3552E-01 6.2633E-01 -5.5078E-01 2.8871E-01 -8.2438E-02 9.8371E-03
S3 -8.9905E-02 1.9170E-02 -1.5090E-01 4.2462E-01 -6.1290E-01 5.6408E-01 -3.3306E-01 1.1361E-01 -1.6960E-02
S4 -4.8762E-02 -3.8302E-02 1.0766E-01 -2.8954E-01 5.5455E-01 -6.0881E-01 3.7961E-01 -1.2644E-01 1.7269E-02
S5 3.5598E-02 3.6573E-02 -1.3697E-01 2.6977E-01 -3.7991E-01 3.6176E-01 -2.1367E-01 7.2095E-02 -1.0694E-02
S6 -2.8794E-02 7.4709E-02 -1.4524E-01 2.4545E-01 -3.2356E-01 2.8359E-01 -1.5499E-01 4.8360E-02 -6.2185E-03
S7 -9.6145E-02 7.0495E-02 -2.1547E-01 5.5206E-01 -8.7355E-01 8.3746E-01 -4.8101E-01 1.5246E-01 -2.0505E-02
S8 -6.0118E-02 -3.7215E-02 1.1292E-01 -1.6058E-01 1.4596E-01 -8.5589E-02 3.1124E-02 -6.2953E-03 5.3390E-04
S9 2.5178E-02 -3.8244E-02 5.5954E-02 -5.6662E-02 3.4974E-02 -1.3505E-02 3.1702E-03 -4.1132E-04 2.2615E-05
S10 1.6782E-02 -4.8524E-03 1.2993E-02 -1.3079E-02 6.4849E-03 -1.9306E-03 3.5252E-04 -3.6485E-05 1.6401E-06
S11 -1.4546E-02 -2.0648E-02 1.0008E-02 -2.5989E-03 3.6867E-04 -1.2848E-05 -3.9857E-06 5.7053E-07 -2.3774E-08
S12 3.2902E-04 -2.9014E-02 1.4984E-02 -4.5673E-03 9.0781E-04 -1.1558E-04 9.0294E-06 -3.9385E-07 7.3483E-09
S13 7.1021E-03 -2.2151E-02 8.3170E-03 -1.2203E-03 5.8204E-05 5.4295E-06 -9.0880E-07 4.8456E-08 -9.4583E-10
S14 -1.6324E-02 -4.8598E-03 1.5722E-03 -1.5265E-04 5.5032E-06 -3.9530E-07 7.7808E-08 -5.6411E-09 1.3402E-10
表14
图14A示出了实施例7的光学成像镜头的轴上色差曲线，其表示不同波长的光线经由镜头后的会聚焦点偏离。图14B示出了实施例7的光学成像镜头的象散曲线，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的光学成像镜头的畸变曲线，其表示不同像高对应的畸变大小值。图14D示出了实施例7的光学成像镜头的倍率色差曲线，其表示光线经由镜头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 所给出的光学成像镜头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的光学成像镜头。图15示出了根据本申请实施例8的光学成像镜头的结构示意图。
如图15所示，光学成像镜头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为凸面。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为凹面，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15示出了实施例8的光学成像镜头的基本参数表，其中，曲率半径、厚度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 PCTCN2019108451-appb-000013
表15
面号 A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 -8.7186E-03 2.6266E-02 -7.7347E-02 1.2868E-01 -1.3249E-01 8.5222E-02 -3.3390E-02 7.2939E-03 -6.7968E-04
S2 -1.2614E-02 -3.3183E-02 1.1812E-01 -2.4872E-01 3.2015E-01 -2.5144E-01 1.1767E-01 -3.0072E-02 3.2203E-03
S3 -8.8083E-02 2.0561E-02 -1.3362E-01 3.5995E-01 -4.8236E-01 4.0012E-01 -2.0891E-01 6.2338E-02 -8.0638E-03
S4 -4.9013E-02 -3.7356E-02 9.5772E-02 -2.4499E-01 4.5353E-01 -4.8601E-01 2.9846E-01 -9.8877E-02 1.3627E-02
S5 3.7307E-02 4.4228E-02 -1.5660E-01 2.4820E-01 -2.5884E-01 1.8095E-01 -7.9185E-02 2.0508E-02 -2.4969E-03
S6 -3.0030E-02 6.9191E-02 -1.0387E-01 1.0909E-01 -7.9140E-02 2.9284E-02 1.1559E-03 -4.4664E-03 1.2899E-03
S7 -9.6964E-02 7.4912E-02 -2.2140E-01 5.1128E-01 -7.6414E-01 7.0908E-01 -3.9826E-01 1.2406E-01 -1.6435E-02
S8 -5.4574E-02 -3.0356E-02 8.7012E-02 -1.2686E-01 1.1470E-01 -6.5407E-02 2.2795E-02 -4.3639E-03 3.4630E-04
S9 2.4820E-02 -3.3900E-02 4.9622E-02 -5.0820E-02 3.1123E-02 -1.1770E-02 2.6824E-03 -3.3562E-04 1.7708E-05
S10 1.3320E-02 -5.7867E-03 1.2860E-02 -1.1640E-02 5.5447E-03 -1.6276E-03 2.9489E-04 -3.0203E-05 1.3336E-06
S11 -1.7155E-02 -2.0596E-02 1.0015E-02 -2.5986E-03 3.6867E-04 -1.2850E-05 -3.9862E-06 5.7043E-07 -2.3790E-08
S12 3.2142E-04 -2.9566E-02 1.5326E-02 -4.7264E-03 9.5084E-04 -1.2264E-04 9.7422E-06 -4.3512E-07 8.3962E-09
S13 7.3195E-03 -2.0852E-02 7.6805E-03 -1.1073E-03 5.2382E-05 4.5967E-06 -7.6143E-07 3.9728E-08 -7.5678E-10
S14 -2.0242E-02 3.4893E-04 -1.0865E-03 5.8026E-04 -1.1471E-04 1.1663E-05 -6.4826E-07 1.8510E-08 -2.0788E-10
表16
图16A示出了实施例8的光学成像镜头的轴上色差曲线，其表示不同波长的光线经由镜头后的会聚焦点偏离。图16B示出了实施例8的光学成像镜头的象散曲线，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的光学成像镜头的畸变曲线，其表示不同像高对应的畸变大小值。图16D示出了实施例8的光学成像镜头的倍率色差曲线，其表示光线经由镜头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所给出的光学成像镜头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
tan(HFOV)*f(mm) 4.93 4.53 4.46 4.62 4.69 4.57 4.52 4.34
TTL/f1 0.94 0.87 0.82 0.89 0.88 0.91 0.97 1.01
TTL/ImgH 1.24 1.29 1.33 1.25 1.21 1.26 1.29 1.33
f/f5 0.47 0.79 0.92 0.44 0.09 0.43 0.66 0.70
|f7/f| 0.88 0.94 1.14 0.89 0.78 0.78 0.92 0.92
R13/f -0.77 -1.10 -0.69 -0.88 -0.78 -0.78 -1.02 -1.04
|R11-R12|/|R11+R12| 0.08 0.03 0.06 0.12 0.36 0.35 0.06 0.08
T67/(CT6+CT7) 1.33 1.10 1.15 1.07 1.04 1.01 1.25 1.15
R1/R4 0.55 0.43 0.61 0.50 0.40 0.40 0.50 0.52
T23/T12 0.28 0.34 0.28 0.46 0.52 0.55 0.47 0.40
DT31/DT21 1.07 1.07 1.08 1.05 1.09 1.09 1.04 1.01
表17
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镜头。
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 (24)

  1. 光学成像镜头，其特征在于，沿着光轴由物侧至像侧依序包括：
    具有正光焦度的第一透镜，其像侧面为凹面；
    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；
    具有正光焦度的第五透镜；
    具有光焦度的第六透镜，其物侧面为凸面，像侧面为凹面；以及
    具有光焦度的第七透镜，其物侧面为凹面，
    所述光学成像镜头的最大半视场角HFOV与所述光学成像镜头的总有效焦距f满足tan(HFOV)*f≥4.34mm。
  2. 根据权利要求1所述的光学成像镜头，其特征在于，所述第一透镜的物侧面至所述光学成像镜头的成像面在所述光轴上的距离TTL与所述第一透镜的有效焦距f1满足0.6＜TTL/f1＜1.3。
  3. 根据权利要求1所述的光学成像镜头，其特征在于，所述光学成像镜头的总有效焦距f与所述光学成像镜头的入瞳直径EPD满足f/EPD≤2。
  4. 根据权利要求1所述的光学成像镜头，其特征在于，所述光学成像镜头的总有效焦距f与所述第五透镜的有效焦距f5满足0＜f/f5＜1。
  5. 根据权利要求1所述的光学成像镜头，其特征在于，所述光学成像镜头的总有效焦距f与所述第七透镜的有效焦距f7满足0.5＜|f7/f|＜1.3。
  6. 根据权利要求5所述的光学成像镜头，其特征在于，所述光学成像镜头的总有效焦距f与所述第七透镜的物侧面的曲率半径R13满足-1.3＜R13/f＜-0.3。
  7. 根据权利要求1所述的光学成像镜头，其特征在于，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＜|R11-R12|/|R11+R12|＜0.5。
  8. 根据权利要求1所述的光学成像镜头，其特征在于，所述第六透镜在所述光轴上的中心厚度CT6、所述第七透镜在所述光轴上的中心厚度CT7与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满足0.8＜T67/(CT6+CT7)＜1.5。
  9. 根据权利要求1所述的光学成像镜头，其特征在于，所述第一透镜的物侧面的曲率半径R1与所述第四透镜的像侧面的曲率半径R4满足0.2＜R1/R4＜0.7。
  10. 根据权利要求1所述的光学成像镜头，其特征在于，所述第一透镜和所述第二透镜在所述光轴上的间隔距离T12与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满足0＜T23/T12＜0.7。
  11. 根据权利要求1所述的光学成像镜头，其特征在于，所述第二透镜的物侧面的最大有效半径DT21与所述第三透镜的物侧面的最大有效半径DT31满足1.01≤DT31/DT21＜1.4。
  12. 根据权利要求1至11中任一项所述的光学成像镜头，其特征在于，所述第一透镜的物侧面至所述光学成像镜头的成像面在所述光轴上的距离TTL与所述光学成像镜头的成像面上有效像素区域对角线长的一半ImgH满足TTL/ImgH≤1.33。
  13. 光学成像镜头，其特征在于，沿着光轴由物侧至像侧依序包括：
    具有正光焦度的第一透镜，其像侧面为凹面；
    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；
    具有正光焦度的第五透镜；
    具有光焦度的第六透镜，其物侧面为凸面，像侧面为凹面；
    具有光焦度的第七透镜，其物侧面为凹面，以及
    所述光学成像镜头的总有效焦距f与所述光学成像镜头的入瞳直径EPD满足f/EPD≤2。
  14. 根据权利要求13所述的光学成像镜头，其特征在于，所述第一透镜的物侧面至所述光学成像镜头的成像面在所述光轴上的距离TTL与所述第一透镜的有效焦距f1满足0.6＜TTL/f1＜1.3。
  15. 根据权利要求14所述的光学成像镜头，其特征在于，所述光学成像镜头的最大半视场角HFOV与所述光学成像镜头的总有效焦距f满足tan(HFOV)*f≥4.34mm。
  16. 根据权利要求13所述的光学成像镜头，其特征在于，所述光学成像镜头的总有效焦距f与所述第五透镜的有效焦距f5满足0＜f/f5＜1。
  17. 根据权利要求13所述的光学成像镜头，其特征在于，所述光学成像镜头的总有效焦距f与所述第七透镜的有效焦距f7满足0.5＜|f7/f|＜1.3。
  18. 根据权利要求17所述的光学成像镜头，其特征在于，所述光学成像镜头的总有效焦距f与所述第七透镜的物侧面的曲率半径R13满足-1.3＜R13/f＜-0.3。
  19. 根据权利要求13所述的光学成像镜头，其特征在于，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＜|R11-R12|/|R11+R12|＜0.5。
  20. 根据权利要求13所述的光学成像镜头，其特征在于，所述第一透镜的物侧面的曲率半径R1与所述第四透镜的像侧面的曲率半径R4满足0.2＜R1/R4＜0.7。
  21. 根据权利要求13所述的光学成像镜头，其特征在于，所述第二透镜的物侧面的最大有效半径DT21与所述第三透镜的物侧面的最大有效半径DT31满足1.01≤DT31/DT21＜1.4。
  22. 根据权利要求14所述的光学成像镜头，其特征在于，所述第六透镜在所述光轴上的中心厚度CT6、所述第七透镜在所述光轴上的中心厚度CT7与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满足0.8＜T67/(CT6+CT7)＜1.5。
  23. 根据权利要求14所述的光学成像镜头，其特征在于，所述第一透镜和所述第二透镜在所述光轴上的间隔距离T12与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满足0＜T23/T12＜0.7。
  24. 根据权利要求13至23中任一项所述的光学成像镜头，其特征在于，所述第一透镜的物侧面至所述光学成像镜头的成像面在所述光轴上的距离TTL与所述光学成像镜头的成像面上有效像素区域对角线长的一半ImgH满足TTL/ImgH≤1.33。
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