WO2019233159A1 - 光学成像镜头 - Google Patents

光学成像镜头 Download PDF

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Publication number
WO2019233159A1
WO2019233159A1 PCT/CN2019/078960 CN2019078960W WO2019233159A1 WO 2019233159 A1 WO2019233159 A1 WO 2019233159A1 CN 2019078960 W CN2019078960 W CN 2019078960W WO 2019233159 A1 WO2019233159 A1 WO 2019233159A1
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Prior art keywords
lens
optical imaging
imaging lens
satisfy
object side
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PCT/CN2019/078960
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English (en)
French (fr)
Inventor
徐标
张凯元
黄林
Original Assignee
浙江舜宇光学有限公司
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Publication of WO2019233159A1 publication Critical patent/WO2019233159A1/zh
Priority to US16/832,892 priority Critical patent/US11385439B2/en

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    • 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 -
    • G02B9/60—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having five components only
    • 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
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/0025—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for optical correction, e.g. distorsion, aberration
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/50—Constructional details
    • H04N23/55—Optical parts specially adapted for electronic image sensors; Mounting thereof

Definitions

  • the present application relates to an optical imaging lens, and more particularly, the present application relates to an optical imaging lens including five lenses.
  • a combination of a telephoto lens and a wide-angle lens is usually used to achieve automatic zoom, and to meet the market demand for high imaging performance.
  • a combination of a telephoto lens and a wide-angle lens is usually used to achieve automatic zoom, and to meet the market demand for high imaging performance.
  • corresponding requirements are put forward for the telephoto lens.
  • it is also required to have excellent imaging quality and low sensitivity.
  • the present application provides an optical imaging lens, for example, a telephoto lens, which can at least partially or partially solve the above-mentioned at least one disadvantage of the prior art.
  • the present application provides such an optical imaging lens, which includes, in order from the object side to the image side along the optical axis, a first lens, a second lens, a third lens, a fourth lens, and a fifth lens.
  • the first lens may have positive power, the object side may be convex, and the image side may be convex; the second lens may have negative power; the third lens may have positive power or negative power, and the object side may be
  • the fourth lens may have a positive power; the fifth lens may have a negative power, and the object side may be concave, and the image side may be concave.
  • the separation distance T34 on the optical axis of the third lens and the fourth lens and the separation distance T23 on the optical axis of the second lens and the third lens may satisfy 3 ⁇ T34 / T23 ⁇ 7.
  • the maximum half field angle HFOV of the optical imaging lens can satisfy HFOV ⁇ 30 °.
  • the effective focal length f2 of the second lens and the curvature radius R4 of the image side of the second lens may satisfy -2.5 ⁇ f2 / R4 ⁇ -1.4.
  • the curvature radius R2 of the image side of the first lens and the curvature radius R1 of the object side of the first lens may satisfy 1 ⁇ (R2-R1) / (R2 + R1) ⁇ 2.
  • the effective focal length f1 of the first lens and the center thickness CT1 of the first lens on the optical axis may satisfy 2 ⁇ f1 / CT1 ⁇ 3.
  • the curvature radius R5 of the object side of the third lens and the curvature radius R8 of the image side of the fourth lens may satisfy
  • the total effective focal length f of the optical imaging lens and the combined focal length f123 of the first lens, the second lens, and the third lens may satisfy 0.5 ⁇ f / f123 ⁇ 1.5.
  • the effective focal length f4 of the fourth lens and the effective focal length f5 of the fifth lens may satisfy -2 ⁇ f4 / f5 ⁇ -1.
  • the curvature radius R9 of the object side of the fifth lens and the curvature radius R10 of the image side of the fifth lens may satisfy
  • the total effective focal length f of the optical imaging lens and the combined focal length f45 of the fourth lens and the fifth lens may satisfy -1 ⁇ f / f45 ⁇ 0.
  • the center thickness CT5 of the fifth lens on the optical axis and the center thickness CT4 of the fourth lens on the optical axis may satisfy 0.4 ⁇ CT5 / CT4 ⁇ 1.4.
  • the distance TTL on the optical axis from the object side of the first lens to the imaging surface of the optical imaging lens and the total effective focal length f of the optical imaging lens may satisfy TTL / f ⁇ 0.95.
  • This application uses five lenses. By reasonably distributing the power, surface shape, center thickness of each lens, and the axial distance between each lens, the above optical imaging lens has a telephoto, high imaging quality and Low sensitivity etc. at least one beneficial effect.
  • FIG. 1 is a schematic structural diagram of an optical imaging lens according to Embodiment 1 of the present application.
  • 2A to 2D respectively show the chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens of Example 1 on the axis;
  • FIG. 3 is a schematic structural diagram of an optical imaging lens according to Embodiment 2 of the present application.
  • 4A to 4D respectively show the on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens of Example 2;
  • FIG. 5 is a schematic structural diagram of an optical imaging lens according to Embodiment 3 of the present application.
  • 6A to 6D respectively show on-axis chromatic aberration curves, astigmatism curves, distortion curves, and magnification chromatic aberration curves of the optical imaging lens of Example 3;
  • FIG. 7 is a schematic structural diagram of an optical imaging lens according to Embodiment 4 of the present application.
  • 8A to 8D respectively show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of the optical imaging lens of Example 4;
  • FIG. 9 is a schematic structural diagram of an optical imaging lens according to Embodiment 5 of the present application.
  • FIG. 10A to FIG. 10D respectively show on-axis chromatic aberration curves, astigmatism curves, distortion curves, and magnification chromatic aberration curves of the optical imaging lens of Example 5;
  • FIG. 11 is a schematic structural diagram of an optical imaging lens according to Embodiment 6 of the present application.
  • 12A to 12D respectively show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of the optical imaging lens of Embodiment 6;
  • FIG. 13 is a schematic structural diagram of an optical imaging lens according to Embodiment 7 of the present application.
  • 14A to 14D respectively show on-axis chromatic aberration curves, astigmatism curves, distortion curves, and magnification chromatic aberration curves of the optical imaging lens of Example 7.
  • first, second, third, etc. are only used to distinguish one feature from another feature, and do not indicate any limitation on the feature. Therefore, without departing from the teachings of this application, a first lens discussed below may also be referred to as a second lens or a third lens.
  • the thickness, size, and shape of the lens have been slightly exaggerated.
  • the shape of the spherical or aspherical surface shown in the drawings is shown by way of example. That is, the shape of the spherical or aspherical surface is not limited to the shape of the spherical or aspherical surface shown in the drawings.
  • the drawings are only examples and are not drawn to scale.
  • the paraxial region refers to a region near the optical axis. If the lens surface is convex and the convex position is not defined, it means that the lens surface is convex at least in the paraxial area; if the lens surface is concave and the concave position is not defined, it means that the lens surface is at least in the paraxial area. Concave. The surface closer to the object side of each lens is called the object side of the lens; the surface closer to the image side of each lens 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, five lenses having power, that is, a first lens, a second lens, a third lens, a fourth lens, and a fifth lens. These five lenses are arranged in order from the object side to the image side along the optical axis, and there can be an air gap between each adjacent lens.
  • the first lens may have a positive power
  • the object side may be convex
  • the image side may be convex
  • the second lens may have a negative power
  • the third lens may have a positive power or a negative power Degree, its object side may be concave.
  • Reasonably controlling the power and surface shape of the first lens, the second lens, and the third lens can help reduce the aberrations of the field of view on the system axis and make the system axis have good imaging performance; at the same time, there can be It is beneficial to shorten the overall length of the imaging lens and achieve the characteristics of miniaturization.
  • the image side of the second lens may be concave.
  • the fourth lens may have a positive refractive power; the fifth lens may have a negative refractive power, and an object-side surface thereof may be concave and an image-side surface may be concave.
  • the rational distribution of the power and surface shape of the fourth lens and the fifth lens can reduce the incident angle of the main ray of the optical system and improve the matching with the main ray angle of the chip. Further, the image side of the fourth lens may be convex.
  • the optical imaging lens of the present application can satisfy a conditional expression HFOV ⁇ 30 °, where HFOV is a maximum half field angle of the optical imaging lens. More specifically, HFOV can further satisfy 22 ° ⁇ HFOV ⁇ 25 °, such as 23.0 ° ⁇ HFOV ⁇ 23.6 °.
  • the optical imaging lens of the present application can satisfy the conditional expression 3 ⁇ T34 / T23 ⁇ 7, where T34 is the distance between the third lens and the fourth 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, T34 and T23 can further satisfy 3.24 ⁇ T34 / T23 ⁇ 7.00.
  • the system can have a telephoto characteristic and have easy processing characteristics.
  • the optical imaging lens of the present application may satisfy a conditional expression -2.5 ⁇ f2 / R4 ⁇ -1.4, where f2 is an effective focal length of the second lens and R4 is a radius of curvature of an image side of the second lens. More specifically, f2 and R4 can further satisfy -2.43 ⁇ f2 / R4 ⁇ -1.48.
  • the field curvature contribution of the image side of the second lens can be controlled within a reasonable range to balance the Field curvature.
  • the optical imaging lens of the present application can satisfy the conditional expression 1 ⁇ (R2-R1) / (R2 + R1) ⁇ 2, where R2 is the curvature radius of the image side of the first lens, and R1 is the first The radius of curvature of the object side of a lens. More specifically, R2 and R1 can further satisfy 1.28 ⁇ (R2-R1) / (R2 + R1) ⁇ 1.83.
  • the on-axis and off-axis fields of view can be effectively reduced Coma, so that the imaging system has good imaging quality.
  • the optical imaging lens of the present application can satisfy the conditional expression 2 ⁇ f1 / CT1 ⁇ 3, where f1 is the effective focal length of the first lens and CT1 is the center thickness of the first lens on the optical axis. More specifically, f1 and CT1 can further satisfy 2.23 ⁇ f1 / CT1 ⁇ 2.77.
  • the optical imaging lens of the present application may satisfy a conditional expression -2 ⁇ f4 / f5 ⁇ -1, where f4 is an effective focal length of the fourth lens and f5 is an effective focal length of the fifth lens. More specifically, f4 and f5 can further satisfy ⁇ 1.65 ⁇ f4 / f5 ⁇ -1.13.
  • the optical imaging lens of the present application may satisfy the conditional expression
  • the field curvature of each field of view can be effectively balanced within a reasonable range, and Can make the imaging system have good imaging quality.
  • the optical imaging lens of the present application may satisfy the conditional expression
  • the incident light from the system can be effectively reduced
  • the deflection angle of the lens to the fourth lens can reasonably adjust the distribution of the light beam on the curved surface and reduce the sensitivity of the system.
  • the optical imaging lens of the present application may satisfy a conditional expression of 0.5 ⁇ f / f123 ⁇ 1.5, where f is a total effective focal length of the optical imaging lens, and f123 is a first lens, a second lens, and a third lens. Combined focal length. More specifically, f and f123 can further satisfy 0.90 ⁇ f / f123 ⁇ 1.30, for example, 0.99 ⁇ f / f123 ⁇ 1.25. By constraining the ratio of f and f123 within a certain range, the optical power of the system can be reasonably distributed, so that the system has good imaging quality and effectively reduces the sensitivity of the system.
  • the optical imaging lens of the present application can satisfy the conditional expression -1 ⁇ f / f45 ⁇ 0, where f is a total effective focal length of the optical imaging lens, and f45 is a combined focal length of the fourth lens and the fifth lens. . More specifically, f and f45 can further satisfy -0.79 ⁇ f / f45 ⁇ -0.06. By constraining the ratio of f to f45 within a certain range, the principal ray angle of the image plane of the incident system can be reasonably and effectively reduced, and the matching between the lens and the chip can be improved.
  • the optical imaging lens of the present application can satisfy the conditional TTL / f ⁇ 0.95, where TTL is the distance on the optical axis from the object side of the first lens to the imaging surface of the optical imaging lens, and f is optical The total effective focal length of the imaging lens. More specifically, TTL and f can further satisfy 0.8 ⁇ TTL / f ⁇ 0.95, such as 0.90 ⁇ TTL / f ⁇ 0.95. By controlling the ratio of the total optical length of the imaging system to the total effective focal length of the system, it can help achieve the telephoto characteristics and high pixel characteristics of the optical system.
  • the optical imaging lens of the present application can satisfy the conditional expression 0.4 ⁇ CT5 / CT4 ⁇ 1.4, where CT5 is the center thickness of the fifth lens on the optical axis, and CT4 is the fourth lens on the optical axis. Center thickness. More specifically, CT5 and CT4 can further satisfy 0.45 ⁇ CT5 / CT4 ⁇ 1.38.
  • the system can be provided with process characteristics that are easy to process.
  • the above-mentioned optical imaging lens may further include at least one diaphragm to improve the imaging quality of the lens.
  • the diaphragm can be set at any position between the object side and the image side as needed.
  • the diaphragm may be disposed between the object side and the first lens, between the first lens and the second lens, or between the second lens and the third 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 on the imaging surface.
  • the optical imaging lens according to the above embodiment of the present application may employ multiple lenses, such as the five described above.
  • the size of the lens can be effectively reduced, the sensitivity of the lens can be reduced, and the processability of the lens can be improved.
  • the optical imaging lens configured as described above can have beneficial effects such as telephoto, high imaging quality, and low sensitivity.
  • the optical imaging lens as described above can be used as a telephoto lens and can be used with other well-known wide-angle lenses.
  • At least one of the mirror surfaces of each lens is an aspherical mirror surface.
  • Aspheric lenses are characterized by a curvature that varies continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens with a constant curvature from the lens center to the periphery of the lens, an aspheric lens has better curvature radius characteristics, and has the advantages of improving distortion and astigmatic aberration. The use of aspheric lenses can eliminate as much aberrations as possible during imaging, thereby improving imaging quality.
  • the number of lenses constituting the optical imaging lens may be changed to obtain various results and advantages described in this specification.
  • the optical imaging lens is not limited to including five lenses. If necessary, the optical imaging lens may further include other numbers of lenses. Specific examples of the optical imaging lens applicable to the above embodiments will be further described below with reference to the drawings.
  • FIG. 1 is a schematic structural diagram of an optical imaging lens according to Embodiment 1 of the present application.
  • an optical imaging lens includes: a first lens E1, a diaphragm STO, a second lens E2, a third lens E3, a first lens
  • the first lens E1 has a positive power, and the object side surface S1 is a convex surface, and the image side surface S2 is a convex surface.
  • the second lens E2 has a negative power, and 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 power, and the object side surface S5 is a concave surface, and the image side surface S6 is a concave surface.
  • the fourth lens E4 has a positive power, and the object side surface S7 is a concave surface, and the image side surface S8 is a convex surface.
  • the fifth lens E5 has a negative power
  • the object side surface S9 is a concave surface
  • the image side surface S10 is a concave surface
  • the filter E6 has an object side surface S11 and an image side surface S12. The light from the object sequentially passes through the surfaces S1 to S12 and is finally imaged on the imaging surface S13.
  • Table 1 shows the surface type, the radius of curvature, the thickness, the material, and the conic coefficient of each lens of the optical imaging lens of Example 1.
  • the units of the radius of curvature and thickness are millimeters (mm).
  • each aspheric lens can be defined using, but not limited to, the following aspheric formula:
  • x is the distance vector from the vertex of the aspheric surface when the aspheric surface is at the height h along the optical axis;
  • k is the conic coefficient (given in Table 1);
  • Ai is the correction coefficient of the aspherical i-th order.
  • Table 2 below shows the higher-order coefficients A 4 , A 6 , A 8 , A 10 , A 12 , A 14 , A 16 , A 18, and A 20 that can be used for each aspherical mirror surface S1-S10 in Example 1. .
  • Table 3 shows the effective focal lengths f1 to f5 of each lens in Example 1, the total effective focal length f of the optical imaging lens, and the total optical length TTL (that is, from the object side S1 to the imaging surface S13 of the first lens E1 on the optical axis Distance), half the ImgH of the diagonal of the effective pixel area on the imaging plane S13, and the maximum half field of view angle HFOV.
  • FIG. 2A shows an on-axis chromatic aberration curve of the optical imaging lens of Example 1, which indicates that light rays with different wavelengths deviate from the focal point after passing through the lens.
  • FIG. 2B shows an astigmatism curve of the optical imaging lens of Example 1, which represents a meridional image plane curvature and a sagittal image plane curvature.
  • FIG. 2C shows a distortion curve of the optical imaging lens of Example 1, which represents the value of the distortion at different image heights.
  • FIG. 2D shows the magnification chromatic aberration curve of the optical imaging lens of Example 1, which represents the deviation of different image heights on the imaging plane after the light passes through the lens. According to FIG. 2A to FIG. 2D, it can be known that the optical imaging lens provided in Embodiment 1 can achieve good imaging quality.
  • FIG. 3 is 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, an aperture STO, a first lens E1, a second lens E2, a third lens E3, and a first lens.
  • the first lens E1 has a positive power, and the object side surface S1 is a convex surface, and the image side surface S2 is a convex surface.
  • the second lens E2 has a negative power, and 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 power, and the object side surface S5 is a concave surface, and the image side surface S6 is a convex surface.
  • the fourth lens E4 has a positive power, and the object side surface S7 is a concave surface, and the image side surface S8 is a convex surface.
  • the fifth lens E5 has a negative power
  • the object side surface S9 is a concave surface
  • the image side surface S10 is a concave surface
  • the filter E6 has an object side surface S11 and an image side surface S12. The light from the object sequentially passes through the surfaces S1 to S12 and is finally imaged on the imaging surface S13.
  • Table 4 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical imaging lens of Example 2, where the units of the radius of curvature and thickness are millimeters (mm).
  • Table 5 shows the higher-order term coefficients that can be used for each aspherical mirror surface in Embodiment 2, where each aspheric surface type can be defined by the formula (1) given in the above-mentioned Embodiment 1.
  • Table 6 shows the effective focal lengths f1 to f5 of each lens, the total effective focal length f of the optical imaging lens, the total optical length TTL, half the ImgH of the diagonal length of the effective pixel area on the imaging surface S13, and the maximum half field of view. Angular HFOV.
  • FIG. 4A shows an on-axis chromatic aberration curve of the optical imaging lens of Embodiment 2, which indicates that light rays with different wavelengths deviate from the focal point after passing through the lens.
  • FIG. 4B shows an astigmatism curve of the optical imaging lens of Example 2, which represents a meridional image plane curvature and a sagittal image plane curvature.
  • FIG. 4C shows the distortion curve of the optical imaging lens of Example 2, which represents the value of the distortion magnitude at different image heights.
  • FIG. 4D shows a magnification chromatic aberration curve of the optical imaging lens of Example 2, which represents deviations of different image heights on the imaging plane after light passes through the lens. According to FIG. 4A to FIG. 4D, it can be known that the optical imaging lens provided in Embodiment 2 can achieve good imaging quality.
  • FIG. 5 is 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 first lens E1, a second lens E2, a diaphragm STO, a third lens E3, a first lens
  • the four lenses E4, the fifth lens E5, the filter E6, and the imaging surface S13 are shown in FIG. 5, the optical imaging lens according to the exemplary embodiment of the present application.
  • the first lens E1 has a positive power, and the object side surface S1 is a convex surface, and the image side surface S2 is a convex surface.
  • the second lens E2 has a negative power, and 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 power, and the object side surface S5 is a concave surface, and the image side surface S6 is a concave surface.
  • the fourth lens E4 has a positive power, and the object side surface S7 is a concave surface, and the image side surface S8 is a convex surface.
  • the fifth lens E5 has a negative power
  • the object side surface S9 is a concave surface
  • the image side surface S10 is a concave surface
  • the filter E6 has an object side surface S11 and an image side surface S12. The light from the object sequentially passes through the surfaces S1 to S12 and is finally imaged on the imaging surface S13.
  • Table 7 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical imaging lens of Example 3.
  • the units of the radius of curvature and thickness are millimeters (mm).
  • Table 8 shows the higher-order term coefficients that can be used for each aspherical mirror surface in Embodiment 3, where each aspheric surface type can be defined by the formula (1) given in Embodiment 1 above.
  • Table 9 shows the effective focal lengths f1 to f5 of each lens in Example 3, the total effective focal length f of the optical imaging lens, the total optical length TTL, half the ImgH diagonal length of the effective pixel area on the imaging surface S13, and the maximum half field Angular HFOV.
  • FIG. 6A shows an on-axis chromatic aberration curve of the optical imaging lens of Embodiment 3, which indicates that light rays with different wavelengths deviate from the focal point after passing through the lens.
  • FIG. 6B shows an astigmatism curve of the optical imaging lens of Example 3, which represents a meridional image plane curvature and a sagittal image plane curvature.
  • FIG. 6C shows a distortion curve of the optical imaging lens of Example 3, which represents the magnitude of the distortion at different image heights.
  • FIG. 6D shows a magnification chromatic aberration curve of the optical imaging lens of Example 3, which represents deviations of different image heights on the imaging plane after light passes through the lens. According to FIG. 6A to FIG. 6D, it can be known that the optical imaging lens provided in Embodiment 3 can achieve good imaging quality.
  • FIG. 7 is 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 first lens E1, a second lens E2, a diaphragm STO, a third lens E3, a first lens
  • the four lenses E4, the fifth lens E5, the filter E6, and the imaging surface S13 are included in the optical imaging lens.
  • the first lens E1 has a positive power, and the object side surface S1 is a convex surface, and the image side surface S2 is a convex surface.
  • the second lens E2 has a negative power, and the object side surface S3 is a concave surface, and the image side surface S4 is a concave surface.
  • the third lens E3 has a negative power, and the object side surface S5 is a concave surface, and the image side surface S6 is a concave surface.
  • the fourth lens E4 has a positive power, and the object side surface S7 is a concave surface, and the image side surface S8 is a convex surface.
  • the fifth lens E5 has a negative power
  • the object side surface S9 is a concave surface
  • the image side surface S10 is a concave surface
  • the filter E6 has an object side surface S11 and an image side surface S12. The light from the object sequentially passes through the surfaces S1 to S12 and is finally imaged on the imaging surface S13.
  • Table 10 shows the surface type, the radius of curvature, the thickness, the material, and the conic coefficient of each lens of the optical imaging lens of Example 4, where the units of the radius of curvature and thickness are millimeters (mm).
  • Table 11 shows the higher-order term coefficients that can be used for each aspherical mirror surface in Embodiment 4, where each aspheric surface type can be defined by the formula (1) given in Embodiment 1 above.
  • Table 12 shows the effective focal lengths f1 to f5 of each lens, the total effective focal length f of the optical imaging lens, the total optical length TTL, half the ImgH of the diagonal length of the effective pixel area on the imaging surface S13, and the maximum half field of view. Angular HFOV.
  • FIG. 8A shows an on-axis chromatic aberration curve of the optical imaging lens of Example 4, which indicates that light rays with different wavelengths deviate from the focal point after passing through the lens.
  • FIG. 8B shows an astigmatism curve of the optical imaging lens of Example 4, which represents a meridional image plane curvature and a sagittal image plane curvature.
  • FIG. 8C shows a distortion curve of the optical imaging lens of Example 4, which represents values of distortion magnitude at different image heights.
  • FIG. 8D shows the magnification chromatic aberration curve of the optical imaging lens of Example 4, which represents the deviation of different image heights on the imaging plane after the light passes through the lens. 8A to 8D, it can be known that the optical imaging lens provided in Embodiment 4 can achieve good imaging quality.
  • FIG. 9 is a schematic structural diagram of an optical imaging lens according to Embodiment 5 of the present application.
  • the optical imaging lens includes: a first lens E1, a second lens E2, a diaphragm STO, a third lens E3, The four lenses E4, the fifth lens E5, the filter E6, and the imaging surface S13.
  • the first lens E1 has a positive power, and the object side surface S1 is a convex surface, and the image side surface S2 is a convex surface.
  • the second lens E2 has a negative power, and 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 power, and the object side surface S5 is a concave surface, and the image side surface S6 is a concave surface.
  • the fourth lens E4 has a positive power, and the object side surface S7 is a concave surface, and the image side surface S8 is a convex surface.
  • the fifth lens E5 has a negative power
  • the object side surface S9 is a concave surface
  • the image side surface S10 is a concave surface
  • the filter E6 has an object side surface S11 and an image side surface S12. The light from the object sequentially passes through the surfaces S1 to S12 and is finally imaged on the imaging surface S13.
  • Table 13 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical imaging lens of Example 5, where the units of the radius of curvature and thickness are millimeters (mm).
  • Table 14 shows the higher-order term coefficients that can be used for each aspherical mirror surface in Embodiment 5, where each aspheric surface type can be defined by the formula (1) given in the above Embodiment 1.
  • Table 15 shows the effective focal lengths f1 to f5 of each lens, the total effective focal length f of the optical imaging lens, the total optical length TTL, half the ImgH diagonal length of the effective pixel area on the imaging surface S13, and the maximum half field of view Angular HFOV.
  • FIG. 10A shows an on-axis chromatic aberration curve of the optical imaging lens of Example 5, which indicates that light rays with different wavelengths deviate from the focal point after passing through the lens.
  • FIG. 10B shows an astigmatism curve of the optical imaging lens of Example 5, which represents a meridional image plane curvature and a sagittal image plane curvature.
  • FIG. 10C shows a distortion curve of the optical imaging lens of Example 5, which represents the magnitude of the distortion at different image heights.
  • FIG. 10D shows the magnification chromatic aberration curve of the optical imaging lens of Example 5, which represents the deviation of different image heights on the imaging surface after the 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 is a schematic structural diagram of an optical imaging lens according to Embodiment 6 of the present application.
  • the optical imaging lens includes: a first lens E1, a second lens E2, a diaphragm STO, a third lens E3, Four lenses E4, a fifth lens E5, a filter E6, and an imaging surface S13.
  • the first lens E1 has a positive power, and the object side surface S1 is a convex surface, and the image side surface S2 is a convex surface.
  • the second lens E2 has a negative optical power, and an object-side surface S3 thereof is convex, and an image-side surface S4 is concave.
  • the third lens E3 has a negative power, and the object side surface S5 is a concave surface, and the image side surface S6 is a concave surface.
  • the fourth lens E4 has a positive power, and the object side surface S7 is a convex surface, and the image side surface S8 is a convex surface.
  • the fifth lens E5 has a negative power
  • the object side surface S9 is a concave surface
  • the image side surface S10 is a concave surface
  • the filter E6 has an object side surface S11 and an image side surface S12. The light from the object sequentially passes through the surfaces S1 to S12 and is finally imaged on the imaging surface S13.
  • Table 16 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical imaging lens of Example 6, where the units of the radius of curvature and thickness are millimeters (mm).
  • Table 17 shows the higher-order term coefficients that can be used for each aspherical mirror surface in Embodiment 6, where each aspheric surface type can be defined by the formula (1) given in Embodiment 1 above.
  • Table 18 shows the effective focal lengths f1 to f5 of each lens, the total effective focal length f of the optical imaging lens, the total optical length TTL, half the ImgH diagonal length of the effective pixel area on the imaging surface S13, and the maximum half field of view Angular HFOV.
  • FIG. 12A shows an on-axis chromatic aberration curve of the optical imaging lens of Embodiment 6, which shows that the light beams with different wavelengths deviate from the focal point after passing through the lens.
  • FIG. 12B shows an astigmatism curve of the optical imaging lens of Example 6, which represents a meridional image plane curvature and a sagittal image plane curvature.
  • FIG. 12C shows a distortion curve of the optical imaging lens of Example 6, which represents the magnitude of the distortion at different image heights.
  • FIG. 12D shows the magnification chromatic aberration curve of the optical imaging lens of Example 6, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. According to FIG. 12A to FIG. 12D, it can be known that the optical imaging lens provided in Embodiment 6 can achieve good imaging quality.
  • FIG. 13 is 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, an aperture STO, a first lens E1, a second lens E2, a third lens E3, and a first lens.
  • the first lens E1 has a positive power, and the object side surface S1 is a convex surface, and the image side surface S2 is a convex surface.
  • the second lens E2 has a negative power, and the object side surface S3 is a concave surface, and the image side surface S4 is a concave surface.
  • the third lens E3 has a positive power, and the object side surface S5 is a concave surface, and the image side surface S6 is a convex surface.
  • the fourth lens E4 has a positive power, and the object side surface S7 is a concave surface, and the image side surface S8 is a convex surface.
  • the fifth lens E5 has a negative power
  • the object side surface S9 is a concave surface
  • the image side surface S10 is a concave surface
  • the filter E6 has an object side surface S11 and an image side surface S12. The light from the object sequentially passes through the surfaces S1 to S12 and is finally imaged on the imaging surface S13.
  • Table 19 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical imaging lens of Example 7, where the units of the radius of curvature and thickness are millimeters (mm).
  • Table 20 shows the higher-order term coefficients that can be used for each aspherical mirror surface in Embodiment 7, where each aspheric surface type can be defined by the formula (1) given in Embodiment 1 above.
  • Table 21 shows the effective focal lengths f1 to f5 of each lens, the total effective focal length f of the optical imaging lens, the total optical length TTL, half the ImgH of the diagonal length of the effective pixel area on the imaging surface S13, and the maximum half field of view. Angular HFOV.
  • FIG. 14A shows an on-axis chromatic aberration curve of the optical imaging lens of Embodiment 7, which indicates that light rays with different wavelengths deviate from the focal point after passing through the lens.
  • FIG. 14B shows an astigmatism curve of the optical imaging lens of Example 7, which represents a meridional image plane curvature and a sagittal image plane curvature.
  • FIG. 14C shows a distortion curve of the optical imaging lens of Example 7, which represents the magnitude of the distortion at different image heights.
  • FIG. 14D shows a magnification chromatic aberration curve of the optical imaging lens of Example 7, which represents the deviation of different image heights on the imaging plane after the light passes through the lens.
  • the optical imaging lens provided in Embodiment 7 can achieve good imaging quality.
  • Examples 1 to 7 satisfy the relationships shown in Table 22, respectively.
  • the present application also provides an imaging device whose electronic photosensitive element may be a photosensitive coupling element (CCD) or a complementary metal oxide semiconductor element (CMOS).
  • the imaging device may be an independent imaging device such as a digital camera or an imaging module integrated on a mobile electronic device such as a mobile phone.
  • the imaging device is equipped with the optical imaging lens described above.

Abstract

一种光学成像镜头，镜头沿光轴由物侧至像侧依序包括：第一透镜（E1）、第二透镜（E2）、第三透镜（E3）、第四透镜（E4）和第五透镜（E5）。其中，第一透镜（E1）具有正光焦度，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；第三透镜（E3）具有光焦度，物侧面（S5）为凹面；第四透镜（E4）具有正光焦度；第五透镜（E5）具有负光焦度，物侧面（S9）为凹面，像侧面（S10）为凹面；以及第三透镜（E3）和第四透镜（E4）在光轴上的间隔距离T34与第二透镜（E2）和第三透镜（E3）在光轴上的间隔距离T23满足3≤T34/T23≤7。

Description

光学成像镜头
相关申请的交叉引用
本申请要求于2018年06月05日提交于中国国家知识产权局(CNIPA)的、专利申请号为201810570274.2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，本申请涉及一种包括五片透镜的光学成像镜头。
背景技术
近年来，随着智能手机、便携电脑和平板设备等便携式电子产品的高速更新换代，消费者对电子产品中配套使用的光学成像镜头的品质要求越来越高。
在当前兴起的双摄技术中，通常采用长焦镜头与广角镜头的组合来实现自动变焦，并以此来满足市场对高成像性能的需求。为了保证双摄镜头的良好成像效果，对其中的长焦镜头提出了相应的要求，除了需要长焦镜头具有较长焦距，还要求其具有优良成像质量和低敏感性。
发明内容
本申请提供了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，例如，长焦镜头。
一方面，本申请提供了这样一种光学成像镜头，该镜头沿光轴由物侧至像侧依序包括：第一透镜、第二透镜、第三透镜、第四透镜和第五透镜。第一透镜可具有正光焦度，其物侧面可为凸面，像侧面可为凸面；第二透镜可具有负光焦度；第三透镜具有正光焦度或负光焦度，其物侧面可为凹面；第四透镜可具有正光焦度；第五透镜可具有负光焦度，其物侧面可为凹面，像侧面可为凹面。
在一个实施方式中，第三透镜和第四透镜在光轴上的间隔距离T34与第二透镜和第三透镜在光轴上的间隔距离T23可满足3≤T34/T23≤7。
在一个实施方式中，光学成像镜头的最大半视场角HFOV可满足HFOV＜30°。
在一个实施方式中，第二透镜的有效焦距f2与第二透镜的像侧面的曲率半径R4可满足-2.5＜f2/R4＜-1.4。
在一个实施方式中，第一透镜的像侧面的曲率半径R2与第一透镜的物侧面的曲率半径R1可满足1＜(R2-R1)/(R2+R1)＜2。
在一个实施方式中，第一透镜的有效焦距f1与第一透镜于光轴上的中心厚度CT1可满足2＜f1/CT1＜3。
在一个实施方式中，第三透镜的物侧面的曲率半径R5与第四透镜的像侧面的曲率半径R8可满足|(R5-R8)/(R5+R8)|＜0.8。
在一个实施方式中，光学成像镜头的总有效焦距f与第一透镜、第二透镜和第三透镜的组合焦距f123 可满足0.5＜f/f123＜1.5。
在一个实施方式中，第四透镜的有效焦距f4与第五透镜的有效焦距f5可满足-2＜f4/f5＜-1。
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|(R9+R10)/(R9-R10)|≤1。
在一个实施方式中，光学成像镜头的总有效焦距f与第四透镜和第五透镜的组合焦距f45可满足-1＜f/f45＜0。
在一个实施方式中，第五透镜于光轴上的中心厚度CT5与第四透镜于光轴上的中心厚度CT4可满足0.4＜CT5/CT4＜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与光学成像镜头的总有效焦距f可满足TTL/f≤0.95。
本申请采用了五片透镜，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长焦、高成像品质和低敏感性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。
具体实施方式
为了更好地理解本申请，将参考附图对本申请的各个方面做出更详细的说明。应理解，这些详细说明只是对本申请的示例性实施方式的描述，而非以任何方式限制本申请的范围。在说明书全文中，相同的附图标号指代相同的元件。表述“和/或”包括相关联的所列项目中的一个或多个的任何和全部组合。
应注意，在本说明书中，第一、第二、第三等的表述仅用于将一个特征与另一个特征区分开来，而不表示对特征的任何限制。因此，在不背离本申请的教导的情况下，下文中讨论的第一透镜也可被称作第二透镜或第三透镜。
在附图中，为了便于说明，已稍微夸大了透镜的厚度、尺寸和形状。具体来讲，附图中所示的球面或非球面的形状通过示例的方式示出。即，球面或非球面的形状不限于附图中示出的球面或非球面的形状。附图仅为示例而并非严格按比例绘制。
在本文中，近轴区域是指光轴附近的区域。若透镜表面为凸面且未界定该凸面位置时，则表示该透镜表面至少于近轴区域为凸面；若透镜表面为凹面且未界定该凹面位置时，则表示该透镜表面至少于近轴区域为凹面。每个透镜中，较靠近物侧的表面称为该透镜的物侧面；每个透镜中，较靠近像侧的表面称为该透镜的像侧面。
还应理解的是，用语“包括”、“包括有”、“具有”、“包含”和/或“包含有”，当在本说明书中使用时表示存在所陈述的特征、元件和/或部件，但不排除存在或附加有一个或多个其它特征、元件、部件和/或它们的组合。此外，当诸如“...中的至少一个”的表述出现在所列特征的列表之后时，修饰整个所列特征，而不是修饰列表中的单独元件。此外，当描述本申请的实施方式时，使用“可”表示“本申请的一个或多个实施方式”。并且，用语“示例性的”旨在指代示例或举例说明。
除非另外限定，否则本文中使用的所有用语(包括技术用语和科学用语)均具有与本申请所属领域普通技术人员的通常理解相同的含义。还应理解的是，用语(例如在常用词典中定义的用语)应被解释为具有与它们在相关技术的上下文中的含义一致的含义，并且将不被以理想化或过度正式意义解释，除非本文中明确如此限定。
需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互组合。下面将参考附图并结合实施例来详细说明本申请。以下对本申请的特征、原理和其他方面进行详细描述。
根据本申请示例性实施方式的光学成像镜头可包括例如五片具有光焦度的透镜，即，第一透镜、第二透镜、第三透镜、第四透镜和第五透镜。这五片透镜沿着光轴由物侧至像侧依序排列，各相邻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，其物侧面可为凸面，像侧面可为凸面；第二透镜可具有负光焦度；第三透镜具有正光焦度或负光焦度，其物侧面可为凹面。合理控制第一透镜、第二透镜和第三透镜的光焦度及面型，可有利于减小系统轴上视场的像差，使系统轴上具有良好的成像性能；同时，还可有利于缩短成像镜头的总长，实现小型化的特点。进一步地，第二透镜的像侧面可为凹面。
在示例性实施方式中，第四透镜可具有正光焦度；第五透镜可具有负光焦度，其物侧面可为凹面，像侧面可为凹面。合理分配第四透镜和第五透镜的光焦度及面型，可减小光学系统的主光线入射角，提高与芯片主光线角度的匹配性。进一步地，第四透镜的像侧面可为凸面。
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HFOV＜30°，其中，HFOV为光学成像镜头的最大半视场角。更具体地，HFOV进一步可满足22°≤HFOV≤25°，例如23.0°≤HFOV≤23.6°。
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3≤T34/T23≤7，其中，T34为第三透镜和第四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，T34和T23进一步可满足3.24≤T34/T23≤7.00。
通过控制光学系统视场角以及第三、四透镜空气间隔与第二、三透镜空气间隔的比值，可使系统具有长焦特性并具有易于加工的工艺特点。
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-2.5＜f2/R4＜-1.4，其中，f2为第二透镜的有效焦距，R4为第二透镜的像侧面的曲率半径。更具体地，f2和R4进一步可满足-2.43≤f2/R4≤-1.48。通过控制第二透镜的有效焦距与第二透镜的像侧面的曲率半径的比值，可将第二透镜的像侧面的场曲贡献量控制在合理的范围内，以此来平衡后组透镜产生的场曲量。
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＜(R2-R1)/(R2+R1)＜2，其中，R2为第一透镜的像侧面的曲率半径，R1为第一透镜的物侧面的曲率半径。更具体地，R2和R1进一步可满足1.28≤(R2-R1)/(R2+R1)≤1.83。通过将第一透镜像侧面和物侧面的曲率半径之差与第一透镜像侧面和物侧面的曲率半径之和的比值约束在一定范围内，可有效减小轴上视场和轴外视场的彗差，从而使成像系统具有良好的成像质量。
在示例性实施方式中，本申请的光学成像镜头可满足条件式2＜f1/CT1＜3，其中，f1为第一透镜的有效焦距，CT1为第一透镜于光轴上的中心厚度。更具体地，f1和CT1进一步可满足2.23≤f1/CT1≤2.77。通过控制第一透镜的有效焦距与第一透镜于光轴上的中心厚度的比值，可将系统各视场的畸变贡献量控制在合理的范围内，减小系统的像差，进而提高系统的成像质量。
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-2＜f4/f5＜-1，其中，f4为第四透镜的有效焦距，f5为第五透镜的有效焦距。更具体地，f4和f5进一步可满足-1.65≤f4/f5≤-1.13。通过合理分配第四透镜的光焦度和第五透镜的光焦度，并将二者光焦度比值约束在一定范围内，可有利于平衡光学系统的轴外像差。
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|(R9+R10)/(R9-R10)|≤1，其中，R9为第五透镜的物侧面的曲率半径，R10为第五透镜的像侧面的曲率半径。更具体地，R9和R10进一步可满足0≤|(R9+R10)/(R9-R10)|≤1，例如0.25≤|(R9+R10)/(R9-R10)|≤1。通过将第五透镜物侧面和像侧面曲率半径之和与第五透镜物侧面和像侧面曲率半径之差的比值约束在一定范围，可有效平衡各视场的场曲在合理的范围内，进而可使成像系统具有良好的成像质量。
在示例性实施方式中，本申请的光学成像镜头可满足条件式|(R5-R8)/(R5+R8)|＜0.8，其中，R5为第三透镜的物侧面的曲率半径，R8为第四透镜的像侧面的曲率半径。更具体地，R5和R8进一步可满 足0＜|(R5-R8)/(R5+R8)|＜0.8，例如0.26≤|(R5-R8)/(R5+R8)|≤0.74。通过将第三透镜物侧面和第四透镜像侧面曲率半径之差与第三透镜物侧面和第四透镜像侧面曲率半径之和的比值约束在一定范围，可有效减小系统入射光线从第三透镜到第四透镜的偏折角，合理调整光束在曲面上的分布，降低系统的敏感度。
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0.5＜f/f123＜1.5，其中，f为光学成像镜头的总有效焦距，f123为第一透镜、第二透镜和第三透镜的组合焦距。更具体地，f和f123进一步可满足0.90＜f/f123＜1.30，例如，0.99≤f/f123≤1.25。通过将f和f123的比值约束在一定范围内，可合理分配系统的光焦度，使系统具有良好的成像质量并有效降低系统的敏感度。
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-1＜f/f45＜0，其中，f为光学成像镜头的总有效焦距，f45为第四透镜和第五透镜的组合焦距。更具体地，f和f45进一步可满足-0.79≤f/f45≤-0.06。通过将f与f45的比值约束在一定范围内，可合理有效地减小入射系统像面的主光线角度，并可提高镜头与芯片的匹配性。
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/f≤0.95，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，f为光学成像镜头的总有效焦距。更具体地，TTL和f进一步可满足0.8≤TTL/f≤0.95，例如0.90≤TTL/f≤0.95。通过控制成像系统光学总长度与系统总有效焦距的比值，可有助于实现光学系统长焦特性和高像素特性。
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0.4＜CT5/CT4＜1.4，其中，CT5为第五透镜于光轴上的中心厚度，CT4为第四透镜于光轴上的中心厚度。更具体地，CT5和CT4进一步可满足0.45≤CT5/CT4≤1.38。通过将第五透镜于光轴上的中心厚度与第四透镜于光轴上中心厚度的比值控制在一定范围内，可使系统具有易于加工的工艺特点。
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，以提升镜头的成像质量。光阑可根据需要设置在物侧与像侧之间的任意位置处。例如，光阑可设置在物侧与第一透镜之间，第一透镜与第二透镜之间，或者第二透镜与第三透镜之间。
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，例如上文所述的五片。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，可有效地缩小镜头的体积、降低镜头的敏感度并提高镜头的可加工性，使得光学成像镜头更有利于生产加工并且可适用于例如智能手机等的便携式电子产品。同时，通过上述配置的光学成像镜头可具有长焦、高成像质量、低敏感性等有益效果。如上所述的光学成像镜头可用作长焦镜头，并能够与其他公知的广角镜头搭配使用。
在本申请的实施方式中，各透镜的镜面中的至少一个为非球面镜面。非球面透镜的特点是：从透镜中心到透镜周边，曲率是连续变化的。与从透镜中心到透镜周边具有恒定曲率的球面透镜不同，非球面透镜具有更佳的曲率半径特性，具有改善歪曲像差及改善像散像差的优点。采用非球面透镜后，能够尽可能地消除在成像的时候出现的像差，从而改善成像质量。
然而，本领域的技术人员应当理解，在未背离本申请要求保护的技术方案的情况下，可改变构成光学成像镜头的透镜数量，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五个透 镜为例进行了描述，但是该光学成像镜头不限于包括五个透镜。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，根据本申请示例性实施方式的光学成像镜头沿光轴由物侧至像侧依序包括：第一透镜E1、光阑STO、第二透镜E2、第三透镜E3、第四透镜E4、第五透镜E5、滤光片E6和成像面S13。
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为凹面，像侧面S6为凹面。第四透镜E4具有正光焦度，其物侧面S7为凹面，像侧面S8为凸面。第五透镜E5具有负光焦度，其物侧面S9为凹面，像侧面S10为凹面。滤光片E6具有物侧面S11和像侧面S12。来自物体的光依序穿过各表面S1至S12并最终成像在成像面S13上。
表1示出了实施例1的光学成像镜头的各透镜的表面类型、曲率半径、厚度、材料及圆锥系数，其中，曲率半径和厚度的单位均为毫米(mm)。
Figure PCTCN2019078960-appb-000001
表1
由表1可知，第一透镜E1至第五透镜E5中的任意一个透镜的物侧面和像侧面均为非球面。在本实施例中，各非球面透镜的面型x可利用但不限于以下非球面公式进行限定：
Figure PCTCN2019078960-appb-000002
其中，x为非球面沿光轴方向在高度为h的位置时，距非球面顶点的距离矢高；c为非球面的近轴曲率，c＝1/R(即，近轴曲率c为上表1中曲率半径R的倒数)；k为圆锥系数(在表1中已给出)；Ai是非球面第i-th阶的修正系数。下表2给出了可用于实施例1中各非球面镜面S1-S10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。
Figure PCTCN2019078960-appb-000003
表2
表3给出实施例1中各透镜的有效焦距f1至f5、光学成像镜头的总有效焦距f、光学总长度TTL(即，从第一透镜E1的物侧面S1至成像面S13在光轴上的距离)、成像面S13上有效像素区域对角线长的一半ImgH以及最大半视场角HFOV。
Figure PCTCN2019078960-appb-000004
表3
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，其表示不同像高处的畸变大小值。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，根据本申请示例性实施方式的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、滤光片E6和成像面S13。
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为凹面，像侧面S6为凸面。第四透镜E4具有正光焦度，其物侧面S7为凹面，像侧面S8为凸面。第五透镜E5具有负光焦度，其物侧面S9为凹面，像侧面S10为凹面。滤光片E6具有物侧面S11和像侧面S12。来自物体的光依序穿过各表面S1至S12并最终成像在成像面S13上。
表4示出了实施例2的光学成像镜头的各透镜的表面类型、曲率半径、厚度、材料及圆锥系数，其中，曲率半径和厚度的单位均为毫米(mm)。表5示出了可用于实施例2中各非球面镜面的高次项系 数，其中，各非球面面型可由上述实施例1中给出的公式(1)限定。表6给出实施例2中各透镜的有效焦距f1至f5、光学成像镜头的总有效焦距f、光学总长度TTL、成像面S13上有效像素区域对角线长的一半ImgH以及最大半视场角HFOV。
Figure PCTCN2019078960-appb-000005
表4
面号 A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 -2.6700E-03 -2.3860E-02 1.1076E-01 -3.4819E-01 6.6215E-01 -7.8704E-01 5.6721E-01 -2.2710E-01 3.8721E-02
S2 6.3229E-02 -4.4990E-02 -4.9970E-02 3.6829E-01 -8.9131E-01 1.2278E+00 -9.9995E-01 4.4817E-01 -8.5160E-02
S3 6.4997E-02 -1.4071E-01 4.2873E-01 -7.4664E-01 7.5720E-01 -3.0827E-01 -2.6843E-01 4.2874E-01 -1.7461E-01
S4 5.4345E-02 2.6876E-01 -2.4274E+00 1.8880E+01 -7.8736E+01 1.9942E+02 -3.0403E+02 2.5646E+02 -9.1648E+01
S5 2.1866E-01 -1.4396E-01 3.1646E+00 -1.5231E+01 4.4240E+01 -8.0607E+01 8.8736E+01 -5.3700E+01 1.3695E+01
S6 2.5732E-01 1.0961E-01 3.8398E-01 1.1530E-01 -6.4076E+00 2.2432E+01 -3.7036E+01 3.0550E+01 -1.0066E+01
S7 -2.3400E-03 5.1551E-02 -4.0841E-01 8.0696E-01 -8.8734E-01 5.7572E-01 -2.3465E-01 6.1232E-02 -7.8000E-03
S8 2.3154E-01 -8.6167E-01 1.3909E+00 -1.2196E+00 5.3627E-01 -4.6480E-02 -6.2640E-02 2.6980E-02 -3.4900E-03
S9 5.0210E-02 -1.2227E+00 2.9297E+00 -3.3889E+00 2.2841E+00 -9.3846E-01 2.3171E-01 -3.1560E-02 1.8180E-03
S10 -3.4612E-01 2.1533E-01 9.2393E-02 -2.4238E-01 1.7953E-01 -7.2570E-02 1.7159E-02 -2.2400E-03 1.2500E-04
表5
Figure PCTCN2019078960-appb-000006
表6
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，其表示不同像高处的畸变大小值。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，根据本申请示例性实施方式的光学成像镜头沿光轴由物侧至像侧依序包括：第一透镜E1、第二透镜E2、光阑STO、第三透镜E3、第四透镜E4、第五透镜E5、滤光片E6和成像面S13。
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为凹面，像侧面S6为凹面。第四透镜E4具有正光焦度，其物侧面S7为凹面，像侧面S8为凸面。第五透镜E5具有负光焦度，其物侧面S9为凹面，像侧面S10为凹面。滤光片E6具有物侧面S11和像侧面S12。来自物体的光依序穿过各表面S1至S12并最终成像在成像面S13上。
表7示出了实施例3的光学成像镜头的各透镜的表面类型、曲率半径、厚度、材料及圆锥系数，其中，曲率半径和厚度的单位均为毫米(mm)。表8示出了可用于实施例3中各非球面镜面的高次项系数，其中，各非球面面型可由上述实施例1中给出的公式(1)限定。表9给出实施例3中各透镜的有效焦距f1至f5、光学成像镜头的总有效焦距f、光学总长度TTL、成像面S13上有效像素区域对角线长的一半ImgH以及最大半视场角HFOV。
Figure PCTCN2019078960-appb-000007
表7
面号 A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 -1.1380E-02 1.4485E-02 -1.2161E-01 3.7243E-01 -7.3217E-01 8.8232E-01 -6.4741E-01 2.6354E-01 -4.6430E-02
S2 -1.3270E-02 4.9720E-01 -2.2414E+00 6.2557E+00 -1.1686E+01 1.4437E+01 -1.1279E+01 5.0401E+00 -9.8101E-01
S3 -1.6649E-01 7.8763E-01 -2.5763E+00 5.9171E+00 -8.6894E+00 6.7771E+00 -8.1485E-01 -2.4715E+00 1.2317E+00
S4 -9.5330E-02 4.1834E-01 1.6295E+00 -1.7285E+01 8.5823E+01 -2.5032E+02 4.4194E+02 -4.3634E+02 1.8905E+02
S5 2.4486E-01 -6.6430E-02 2.8801E-01 3.3017E-01 -1.3216E+01 6.7746E+01 -1.6062E+02 1.8895E+02 -8.7228E+01
S6 3.0565E-01 5.6835E-02 -1.7262E+00 1.1751E+01 -5.2715E+01 1.4790E+02 -2.5009E+02 2.3217E+02 -9.0237E+01
S7 1.4937E-02 -6.4350E-02 1.1139E-01 -1.5929E-01 1.5761E-01 -1.0539E-01 4.5885E-02 -1.1320E-02 1.1760E-03
S8 -8.0490E-02 -8.0190E-02 2.4175E-01 -2.9042E-01 2.0990E-01 -1.0013E-01 3.1058E-02 -5.5200E-03 4.1500E-04
S9 -1.9372E-01 -2.3190E-02 3.0494E-01 -3.4775E-01 2.0487E-01 -7.1850E-02 1.5185E-02 -1.8000E-03 9.1800E-05
S10 -1.6640E-01 1.0477E-01 -2.3640E-02 -1.4300E-02 1.4284E-02 -5.9300E-03 1.4060E-03 -1.9000E-04 1.0800E-05
表8
Figure PCTCN2019078960-appb-000008
表9
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，其表示不同像高处的畸变大小值。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，根据本申请示例性实施方式的光学成像镜头沿光轴由物侧至像侧依序包括：第一透镜E1、第二透镜E2、光阑STO、第三透镜E3、第四透镜E4、第五透镜E5、滤光片E6和成像面S13。
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为凹面，像侧面S4为凹面。第三透镜E3具有负光焦度，其物侧面S5为凹面，像侧面S6为凹面。第四透镜E4具有正光焦度，其物侧面S7为凹面，像侧面S8为凸面。第五透镜E5具有负光焦度，其物侧面S9为凹面，像侧面S10为凹面。滤光片E6具有物侧面S11和像侧面S12。来自物体的光依序穿过各表面S1至S12并最终成像在成像面S13上。
表10示出了实施例4的光学成像镜头的各透镜的表面类型、曲率半径、厚度、材料及圆锥系数，其中，曲率半径和厚度的单位均为毫米(mm)。表11示出了可用于实施例4中各非球面镜面的高次项系数，其中，各非球面面型可由上述实施例1中给出的公式(1)限定。表12给出实施例4中各透镜的有效焦距f1至f5、光学成像镜头的总有效焦距f、光学总长度TTL、成像面S13上有效像素区域对角线长的一半ImgH以及最大半视场角HFOV。
Figure PCTCN2019078960-appb-000009
Figure PCTCN2019078960-appb-000010
表10
面号 A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 -6.8400E-03 -7.2000E-04 -5.3000E-03 -4.7500E-02 1.8064E-01 -3.2446E-01 3.0489E-01 -1.4877E-01 2.8601E-02
S2 -2.4340E-02 4.6626E-01 -1.8222E+00 4.6623E+00 -8.1931E+00 9.5959E+00 -7.1145E+00 3.0114E+00 -5.5272E-01
S3 -2.0162E-01 1.0392E+00 -3.4093E+00 9.3447E+00 -1.8753E+01 2.5428E+01 -2.1624E+01 1.0319E+01 -2.0782E+00
S4 -1.8331E-01 6.9980E-01 1.2025E-01 -1.0674E+01 6.7896E+01 -2.2799E+02 4.4275E+02 -4.6732E+02 2.0984E+02
S5 3.1616E-01 -5.2709E-01 2.2581E+00 -1.2190E+01 4.7551E+01 -1.2302E+02 2.0094E+02 -1.8834E+02 7.8702E+01
S6 4.2050E-01 -3.2594E-01 -5.9470E-01 4.8604E+00 -1.8723E+01 4.4120E+01 -6.3433E+01 5.1228E+01 -1.7811E+01
S7 -3.9000E-03 8.3651E-02 -2.0848E-01 2.2932E-01 -1.2501E-01 1.4446E-02 1.7976E-02 -8.2400E-03 1.0750E-03
S8 -1.9076E-01 4.1000E-01 -6.4857E-01 6.5111E-01 -4.1763E-01 1.6914E-01 -4.2440E-02 6.2640E-03 -4.3000E-04
S9 -2.1749E-01 3.4191E-01 -4.8559E-01 4.8765E-01 -3.1533E-01 1.2832E-01 -3.1870E-02 4.4290E-03 -2.6000E-04
S10 -1.1725E-01 4.8982E-02 -1.4660E-02 -1.1000E-04 3.2810E-03 -1.9900E-03 5.9500E-04 -9.3000E-05 6.0900E-06
表11
Figure PCTCN2019078960-appb-000011
表12
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，其表示不同像高处的畸变大小值。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，根据本申请示例性实施方式的光学成像镜头沿光轴由物侧至像侧依序包括：第一透镜E1、第二透镜E2、光阑STO、第三透镜E3、第四透镜E4、第五透镜E5、滤光片E6和成像面S13。
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为凹面，像侧面S6为凹面。第四透镜E4具有正光焦度，其物侧面S7为凹面，像侧面S8为凸面。第五透镜E5具有负光焦度，其物侧面S9为凹面，像侧面S10为凹面。滤光片E6具有物侧面S11和像侧面S12。来自物体的光依序穿过各表面S1至S12并最终成像在成像面S13上。
表13示出了实施例5的光学成像镜头的各透镜的表面类型、曲率半径、厚度、材料及圆锥系数，其中，曲率半径和厚度的单位均为毫米(mm)。表14示出了可用于实施例5中各非球面镜面的高次项系数，其中，各非球面面型可由上述实施例1中给出的公式(1)限定。表15给出实施例5中各透镜的有效焦距f1至f5、光学成像镜头的总有效焦距f、光学总长度TTL、成像面S13上有效像素区域对角线长的一半ImgH以及最大半视场角HFOV。
面号 表面类型 曲率半径 厚度 材料 圆锥系数
         折射率 色散系数  
OBJ 球面 无穷 无穷      
S1 非球面 1.3776 0.9160 1.55 56.1 0.1599
S2 非球面 -4.7816 0.0626     -23.6881
S3 非球面 162.4828 0.2307 1.67 20.4 -98.0000
S4 非球面 2.4962 0.1644     -2.1948
STO 球面 无穷 0.0546      
S5 非球面 -5.8130 0.1807 1.54 55.7 29.9979
S6 非球面 4.4172 1.3136     -6.2027
S7 非球面 -6.3382 0.4596 1.67 20.4 14.6707
S8 非球面 -3.2737 0.0992     -32.2931
S9 非球面 -17.5240 0.5396 1.54 55.7 -73.5000
S10 非球面 6.2326 0.4244     -14.4235
S11 球面 无穷 0.2100 1.52 64.2  
S12 球面 无穷 0.5200      
S13 球面 无穷        
表13
面号 A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 -6.8300E-03 -6.4000E-05 -9.7400E-03 -2.3070E-02 1.0564E-01 -1.9652E-01 1.8309E-01 -8.8040E-02 1.6229E-02
S2 -2.5380E-02 4.5696E-01 -1.6966E+00 4.0649E+00 -6.6319E+00 7.1654E+00 -4.8744E+00 1.8846E+00 -3.1471E-01
S3 -2.0145E-01 1.0381E+00 -3.3838E+00 9.2065E+00 -1.8400E+01 2.4964E+01 -2.1377E+01 1.0370E+01 -2.1576E+00
S4 -1.7818E-01 6.9978E-01 -1.9860E-01 -7.2706E+00 4.8140E+01 -1.5989E+02 3.0433E+02 -3.1361E+02 1.3756E+02
S5 3.2222E-01 -6.7327E-01 3.6256E+00 -1.9997E+01 7.5415E+01 -1.8383E+02 2.7775E+02 -2.3648E+02 8.7680E+01
S6 4.2513E-01 -4.8105E-01 8.8423E-01 -3.8671E+00 1.5061E+01 -3.9910E+01 6.5480E+01 -5.9483E+01 2.2802E+01
S7 3.4080E-03 5.6054E-02 -1.4017E-01 1.2294E-01 -2.2190E-02 -4.6810E-02 3.9650E-02 -1.2370E-02 1.3990E-03
S8 -1.8414E-01 3.7407E-01 -5.6272E-01 5.3935E-01 -3.3190E-01 1.2957E-01 -3.1690E-02 4.6840E-03 -3.4000E-04
S9 -2.0376E-01 3.0177E-01 -4.1091E-01 4.0390E-01 -2.5804E-01 1.0411E-01 -2.5680E-02 3.5480E-03 -2.1000E-04
S10 -1.1848E-01 5.1200E-02 -1.9780E-02 6.0110E-03 -1.2100E-03 1.2800E-05 6.9700E-05 -1.8000E-05 1.5800E-06
表14
Figure PCTCN2019078960-appb-000012
表15
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，其表示不同像高处的畸变大小值。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，根据本申请示例性实施方式的光学成像镜头沿光轴由物侧至像侧依序包括：第一透镜E1、第二透镜E2、光阑STO、第三透镜E3、第四透镜E4、第五透镜E5、滤光片E6和成像面S13。
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为凹面，像侧面S6为凹面。第四透镜E4具有正光焦度，其物侧面S7为凸面，像侧面S8为凸面。第五透镜E5具有负光焦度，其物侧面S9为凹面，像侧面S10为凹面。滤光片E6具有物侧面S11和像侧面S12。来自物体的光依序穿过各表面S1至S12并最终成像在成像面S13上。
表16示出了实施例6的光学成像镜头的各透镜的表面类型、曲率半径、厚度、材料及圆锥系数，其中，曲率半径和厚度的单位均为毫米(mm)。表17示出了可用于实施例6中各非球面镜面的高次项系数，其中，各非球面面型可由上述实施例1中给出的公式(1)限定。表18给出实施例6中各透镜的有效焦距f1至f5、光学成像镜头的总有效焦距f、光学总长度TTL、成像面S13上有效像素区域对角线长的一半ImgH以及最大半视场角HFOV。
Figure PCTCN2019078960-appb-000013
表16
面号 A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 -7.3500E-03 -6.0000E-05 -2.3410E-02 4.2260E-02 -4.9420E-02 1.3531E-02 1.7500E-02 -1.7390E-02 3.8210E-03
S2 -3.3290E-02 4.6383E-01 -1.6408E+00 3.7781E+00 -5.9471E+00 6.2315E+00 -4.1299E+00 1.5613E+00 -2.5574E-01
S3 -1.9819E-01 1.0238E+00 -3.2864E+00 8.6933E+00 -1.6864E+01 2.2299E+01 -1.8688E+01 8.8861E+00 -1.8106E+00
S4 -1.6444E-01 7.5524E-01 -1.3814E+00 1.3582E+00 9.2421E+00 -4.7936E+01 1.0582E+02 -1.1631E+02 5.2771E+01
S5 3.2254E-01 -6.9568E-01 3.5175E+00 -1.8513E+01 6.9111E+01 -1.6790E+02 2.5294E+02 -2.1461E+02 7.8734E+01
S6 4.0565E-01 -4.0260E-01 -1.4961E-01 3.8478E+00 -1.6779E+01 4.0036E+01 -5.5648E+01 4.2113E+01 -1.3464E+01
S7 -1.8120E-02 5.4918E-02 -9.6200E-02 4.5106E-02 3.7519E-02 -6.5080E-02 3.8323E-02 -1.0460E-02 1.1030E-03
S8 -1.4442E-01 2.9786E-01 -3.9946E-01 3.2791E-01 -1.7456E-01 6.1777E-02 -1.5130E-02 2.5860E-03 -2.3000E-04
S9 -2.5193E-01 3.6756E-01 -4.2166E-01 3.4823E-01 -1.9258E-01 6.9647E-02 -1.6100E-02 2.2060E-03 -1.4000E-04
S10 -1.1323E-01 6.9482E-02 -5.6660E-02 4.4208E-02 -2.4990E-02 9.3040E-03 -2.1500E-03 2.8000E-04 -1.5000E-05
表17
Figure PCTCN2019078960-appb-000014
表18
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，其表示不同像高处的畸变大小值。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，根据本申请示例性实施方式的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、滤光片E6和成像面S13。
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为凹面，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具有正光焦度，其物侧面S7为凹面，像侧面S8为凸面。第五透镜E5具有负光焦度，其物侧面S9为凹面，像侧面S10为凹面。滤光片E6具有物侧面S11和像侧面S12。来自物体的光依序穿过各表面S1至S12并最终成像在成像面S13上。
表19示出了实施例7的光学成像镜头的各透镜的表面类型、曲率半径、厚度、材料及圆锥系数，其中，曲率半径和厚度的单位均为毫米(mm)。表20示出了可用于实施例7中各非球面镜面的高次项系数，其中，各非球面面型可由上述实施例1中给出的公式(1)限定。表21给出实施例7中各透镜的有效焦距f1至f5、光学成像镜头的总有效焦距f、光学总长度TTL、成像面S13上有效像素区域对角线长的一半ImgH以及最大半视场角HFOV。
Figure PCTCN2019078960-appb-000015
表19
面号 A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 -4.0300E-03 -8.7700E-03 3.4950E-02 -1.2228E-01 2.4839E-01 -3.1593E-01 2.4293E-01 -1.0371E-01 1.8863E-02
S2 6.4859E-02 -6.3820E-02 6.4272E-02 -3.7840E-02 1.4940E-03 1.9860E-03 2.6097E-02 -3.1450E-02 1.1016E-02
S3 6.3392E-02 -9.7920E-02 5.6345E-02 1.1426E+00 -5.0255E+00 1.0691E+01 -1.3000E+01 8.6382E+00 -2.4337E+00
S4 5.7019E-02 1.3926E-01 -9.5620E-01 8.9733E+00 -3.7762E+01 9.4160E+01 -1.4052E+02 1.1572E+02 -4.0145E+01
S5 2.1879E-01 -1.3698E-01 3.1212E+00 -1.5032E+01 4.3667E+01 -7.9690E+01 8.7915E+01 -5.3345E+01 1.3649E+01
S6 2.6329E-01 5.2615E-02 7.5797E-01 -1.2878E+00 -3.2137E+00 1.7986E+01 -3.3487E+01 2.9158E+01 -9.9137E+00
S7 1.3580E-03 5.3015E-02 -3.1903E-01 4.7559E-01 -3.5938E-01 1.3183E-01 -3.3080E-02 1.5090E-02 -3.7000E-03
S8 1.6551E-01 -7.4614E-01 1.4192E+00 -1.5119E+00 9.2505E-01 -3.0440E-01 3.3483E-02 7.5730E-03 -1.8200E-03
S9 -2.5580E-02 -9.8261E-01 2.5761E+00 -3.0989E+00 2.1473E+00 -9.0191E-01 2.2678E-01 -3.1380E-02 1.8320E-03
S10 -2.9967E-01 1.7577E-01 6.9600E-02 -1.7437E-01 1.2166E-01 -4.6270E-02 1.0303E-02 -1.2700E-03 6.6900E-05
表20
Figure PCTCN2019078960-appb-000016
表21
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，其表示不同像高处的畸变大小值。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。
综上，实施例1至实施例7分别满足表22中所示的关系。
Figure PCTCN2019078960-appb-000017
表22
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 (34)

  1. 光学成像镜头，沿光轴由物侧至像侧依序包括：第一透镜、第二透镜、第三透镜、第四透镜和第五透镜，其特征在于，
    第一透镜具有正光焦度，其物侧面为凸面，像侧面为凸面；
    第二透镜具有负光焦度；
    第三透镜具有光焦度，其物侧面为凹面；
    第四透镜具有正光焦度；以及
    第五透镜具有负光焦度，其物侧面为凹面，像侧面为凹面；
    所述第三透镜和所述第四透镜在所述光轴上的间隔距离T34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3≤T34/T23≤7。
  2. 根据权利要求1所述的光学成像镜头，其特征在于，所述第二透镜的有效焦距f2与所述第二透镜的像侧面的曲率半径R4满足-2.5＜f2/R4＜-1.4。
  3. 根据权利要求1所述的光学成像镜头，其特征在于，所述第一透镜的像侧面的曲率半径R2与所述第一透镜的物侧面的曲率半径R1满足1＜(R2-R1)/(R2+R1)＜2。
  4. 根据权利要求1所述的光学成像镜头，其特征在于，所述第一透镜的有效焦距f1与所述第一透镜于所述光轴上的中心厚度CT1满足2＜f1/CT1＜3。
  5. 根据权利要求1所述的光学成像镜头，其特征在于，所述第三透镜的物侧面的曲率半径R5与所述第四透镜的像侧面的曲率半径R8满足|(R5-R8)/(R5+R8)|＜0.8。
  6. 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与所述第一透镜、所述第二透镜和所述第三透镜的组合焦距f123满足0.5＜f/f123＜1.5。
  7. 根据权利要求1所述的光学成像镜头，其特征在于，所述第四透镜的有效焦距f4与所述第五透镜的有效焦距f5满足-2＜f4/f5＜-1。
  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|(R9+R10)/(R9-R10)|≤1。
  9. 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与所述第四透镜和所述第五透镜的组合焦距f45满足-1＜f/f45＜0。
  10. 根据权利要求1所述的光学成像镜头，其特征在于，所述第五透镜于所述光轴上的中心厚度CT5与所述第四透镜于所述光轴上的中心厚度CT4满足0.4＜CT5/CT4＜1.4。
  11. 根据权利要求1至10中任一项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满足HFOV＜30°。
  12. 根据权利要求1至10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总有效焦距f满足TTL/f≤0.95。
  13. 光学成像镜头，沿光轴由物侧至像侧依序包括：第一透镜、第二透镜、第三透镜、第四透镜和第五透镜，其特征在于，
    第一透镜具有正光焦度，其物侧面为凸面，像侧面为凸面；
    第二透镜具有负光焦度；
    第三透镜具有光焦度，其物侧面为凹面；
    第四透镜具有正光焦度；以及
    第五透镜具有负光焦度，其物侧面为凹面，像侧面为凹面；
    所述第一透镜的有效焦距f1与所述第一透镜于所述光轴上的中心厚度CT1满足2＜f1/CT1＜3；
    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总有效焦距f满足TTL/f≤0.95。
  14. 根据权利要求13所述的光学成像镜头，其特征在于，所述第二透镜的有效焦距f2与所述第二透镜的像侧面的曲率半径R4满足-2.5＜f2/R4＜-1.4。
  15. 根据权利要求13所述的光学成像镜头，其特征在于，所述第一透镜的像侧面的曲率半径R2与所述第一透镜的物侧面的曲率半径R1满足1＜(R2-R1)/(R2+R1)＜2。
  16. 根据权利要求13所述的光学成像镜头，其特征在于，所述第三透镜的物侧面的曲率半径R5与所述第四透镜的像侧面的曲率半径R8满足|(R5-R8)/(R5+R8)|＜0.8。
  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与所述第一透镜、所述第二透镜和所述第三透镜的组合焦距f123满足0.5＜f/f123＜1.5。
  18. 根据权利要求13所述的光学成像镜头，其特征在于，所述第四透镜的有效焦距f4与所述第五透镜的有效焦距f5满足-2＜f4/f5＜-1。
  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|(R9+R10)/(R9-R10)|≤1。
  20. 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与所述第四透镜和所述第五透镜的组合焦距f45满足-1＜f/f45＜0。
  21. 根据权利要求13所述的光学成像镜头，其特征在于，所述第五透镜于所述光轴上的中心厚度CT5与所述第四透镜于所述光轴上的中心厚度CT4满足0.4＜CT5/CT4＜1.4。
  22. 根据权利要求21所述的光学成像镜头，其特征在于，所述第三透镜和所述第四透镜在所述光轴上的间隔距离T34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3≤T34/T23≤7。
  23. 根据权利要求13至21中任一项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满足HFOV＜30°。
  24. 光学成像镜头，沿光轴由物侧至像侧依序包括：第一透镜、第二透镜、第三透镜、第四透镜和第五透镜，其特征在于，
    第一透镜具有正光焦度，其物侧面为凸面，像侧面为凸面；
    第二透镜具有负光焦度；
    第三透镜具有光焦度，其物侧面为凹面；
    第四透镜具有正光焦度；以及
    第五透镜具有负光焦度，其物侧面为凹面，像侧面为凹面；
    所述第四透镜的有效焦距f4与所述第五透镜的有效焦距f5满足-2＜f4/f5＜-1；
    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总有效焦距f满足TTL/f≤0.95。
  25. 根据权利要求24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满足HFOV＜30°。
  26. 根据权利要求24所述的光学成像镜头，其特征在于，所述第一透镜的像侧面的曲率半径R2与所述第一透镜的物侧面的曲率半径R1满足1＜(R2-R1)/(R2+R1)＜2。
  27. 根据权利要求26所述的光学成像镜头，其特征在于，所述第一透镜的有效焦距f1与所述第一透镜于所述光轴上的中心厚度CT1满足2＜f1/CT1＜3。
  28. 根据权利要求24所述的光学成像镜头，其特征在于，所述第二透镜的有效焦距f2与所述第二透镜的像侧面的曲率半径R4满足-2.5＜f2/R4＜-1.4。
  29. 根据权利要求24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与所述第一透镜、所述第二透镜和所述第三透镜的组合焦距f123满足0.5＜f/f123＜1.5。
  30. 根据权利要求24所述的光学成像镜头，其特征在于，所述第五透镜于所述光轴上的中心厚度CT5与所述第四透镜于所述光轴上的中心厚度CT4满足0.4＜CT5/CT4＜1.4。
  31. 根据权利要求30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与所述第四透镜和所述第五透镜的组合焦距f45满足-1＜f/f45＜0。
  32. 根据权利要求24所述的光学成像镜头，其特征在于，所述第三透镜的物侧面的曲率半径R5与所述第四透镜的像侧面的曲率半径R8满足|(R5-R8)/(R5+R8)|＜0.8。
  33. 根据权利要求32所述的光学成像镜头，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|(R9+R10)/(R9-R10)|≤1。
  34. 根据权利要求32所述的光学成像镜头，其特征在于，所述第三透镜和所述第四透镜在所述光轴上的间隔距离T34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3≤T34/T23≤7。
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