WO2019037466A1 - 摄像镜头 - Google Patents

摄像镜头 Download PDF

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Publication number
WO2019037466A1
WO2019037466A1 PCT/CN2018/085626 CN2018085626W WO2019037466A1 WO 2019037466 A1 WO2019037466 A1 WO 2019037466A1 CN 2018085626 W CN2018085626 W CN 2018085626W WO 2019037466 A1 WO2019037466 A1 WO 2019037466A1
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Prior art keywords
lens
imaging
image
image pickup
negative
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PCT/CN2018/085626
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English (en)
French (fr)
Inventor
张凯元
Original Assignee
浙江舜宇光学有限公司
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Priority claimed from CN201721061388.1U external-priority patent/CN207148397U/zh
Priority claimed from CN201710730290.9A external-priority patent/CN107300756B/zh
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
Priority to US16/273,816 priority Critical patent/US11169360B2/en
Publication of WO2019037466A1 publication Critical patent/WO2019037466A1/zh

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
    • G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
    • G02B13/004—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 four lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • 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
    • G02B9/00—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or -
    • G02B9/34—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having four components only
    • 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
    • G02B9/00—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or -
    • G02B9/62—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having six components only
    • 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 imaging lens, and more particularly, to an imaging lens having a curved imaging surface.
  • photosensitive elements commonly used in optical systems include CCD (Charge-Coupled Device) and CMOS (Complementary Metal-Oxide Semiconductor).
  • CCD Charge-Coupled Device
  • CMOS Complementary Metal-Oxide Semiconductor
  • the present application provides an imaging lens that can at least solve or partially address at least one of the above disadvantages of the prior art.
  • the present application provides an imaging lens that includes, in order from the object side to the image side along the optical axis, a first lens having positive power, a second lens having negative power, and at least one Subsequent lens.
  • the lens closest to the image side of the imaging lens is a negative lens having a negative power
  • the lens adjacent to the negative lens is a positive lens having a positive power
  • the imaging lens may further include a curved imaging surface, and the curvature of the imaging surface
  • the radius RI and the total effective focal length f of the camera lens can satisfy
  • the at least one subsequent lens includes, in order from the second lens to the image side along the optical axis, a third lens and a fourth lens, the third lens may have a positive power; and the fourth lens may have a negative light
  • the power can be concave on the image side.
  • the at least one subsequent lens includes, in order from the second lens to the image side along the optical axis, a third lens, a fourth lens, and a fifth lens, the third lens having a positive power or a negative power;
  • the fourth lens may have a positive power; and the fifth lens may have a negative power, and the image side may be a concave surface.
  • the at least one subsequent lens includes, in order from the second lens to the image side along the optical axis, a third lens, a fourth lens, a fifth lens, and a sixth lens, each of the third lens and the fourth lens having The positive power or the negative power; the fifth lens may have a positive power; and the sixth lens may have a negative power, and the image side may be a concave surface.
  • the at least one subsequent lens includes, in order from the second lens to the image side along the optical axis, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens, and a third lens,
  • the fourth lens and the fifth lens each have a positive power or a negative power;
  • the sixth lens may have a positive power;
  • the seventh lens may have a negative power, and the image side may be a concave surface.
  • the object side surface of the first lens may be a convex surface, and the radius of curvature R1 of the object side and the total effective focal length f of the imaging lens may satisfy 2 ⁇ f/R1 ⁇ 5.
  • the effective focal length f1 of the first lens and the effective focal length fn of the negative lens may satisfy -3.0 ⁇ f1/fn ⁇ -0.5.
  • the center thickness CT2 of the second lens on the optical axis and the center thickness CTn of the negative lens on the optical axis may satisfy 0.5 ⁇ CT2/CTn ⁇ 1.0.
  • the dispersion coefficient V1 of the first lens and the dispersion coefficient Vp of the positive lens may satisfy 1 ⁇ V1/Vp ⁇ 3.
  • the center thickness CT1 of the first lens on the optical axis and the center thickness CTp of the positive lens on the optical axis may satisfy 1 ⁇ CT1/CTp ⁇ 2.
  • the entrance pupil diameter EPD of the imaging lens and the maximum half-image height ImgH of the imaging lens may satisfy 0.6 ⁇ EPD/ImgH ⁇ 0.8.
  • the total effective focal length f of the imaging lens and the entrance pupil diameter EPD of the imaging lens may satisfy 1.5 ⁇ f / EPD ⁇ 2.8.
  • the on-axis distance TTL of the object side of the first lens to the imaging surface may satisfy 3.0 mm ⁇ TTL ⁇ 7.5 mm.
  • the on-axis distance TTL of the object side of the first lens to the imaging surface and the maximum half-image height ImgH of the imaging lens may satisfy TTL/ImgH ⁇ 1.75.
  • the present application provides an imaging lens that includes, in order from the object side to the image side along the optical axis, a first lens having positive power, a second lens having negative power, and at least A follow-up lens.
  • the lens closest to the image side of the imaging lens is a negative lens having a negative power
  • the lens adjacent to the negative lens is a positive lens having a positive power
  • the imaging lens may further include a curved imaging surface, the first lens
  • TTL from the side of the object to the imaging surface and the maximum half-image height ImgH of the imaging lens can satisfy TTL/ImgH ⁇ 1.75.
  • the image pickup lens provided with the curved imaging surface provided by the present application can effectively improve the aberration while ensuring the performance of the lens.
  • FIG. 1 is a schematic structural view of an image pickup lens according to Embodiment 1 of the present application.
  • 2A to 2D respectively show an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of the imaging lens of Embodiment 1;
  • FIG. 3 is a schematic structural diagram of an image pickup lens according to Embodiment 2 of the present application.
  • 4A to 4D respectively show an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of the imaging lens of Embodiment 2;
  • FIG. 5 is a schematic structural diagram of an image pickup lens according to Embodiment 3 of the present application.
  • 6A to 6D respectively show an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of the imaging lens of Embodiment 3;
  • FIG. 7 is a schematic structural diagram of an image pickup lens according to Embodiment 4 of the present application.
  • 8A to 8D respectively show an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of the imaging lens of Embodiment 4;
  • FIG. 9 is a schematic structural diagram of an image pickup lens according to Embodiment 5 of the present application.
  • 10A to 10D respectively show an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of the imaging lens of Embodiment 5;
  • FIG. 11 is a schematic structural diagram of an image pickup lens according to Embodiment 6 of the present application.
  • 12A to 12D respectively show an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of the imaging lens of Embodiment 6;
  • FIG. 13 is a schematic structural diagram of an image pickup lens according to Embodiment 7 of the present application.
  • 14A to 14D respectively show an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of the imaging lens of Embodiment 7;
  • FIG. 15 is a schematic structural diagram of an image pickup lens according to Embodiment 8 of the present application.
  • 16A to 16D respectively show an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of the imaging lens of Embodiment 8;
  • FIG. 17 is a schematic structural diagram of an image pickup lens according to Embodiment 9 of the present application.
  • 18A to 18D respectively show an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of the imaging lens of Embodiment 9;
  • FIG. 19 is a schematic structural diagram of an image pickup lens according to Embodiment 10 of the present application.
  • 20A to 20D respectively show an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of the imaging lens of Embodiment 10.
  • first, second, third, etc. are used to distinguish one feature from another, and do not represent any limitation of the feature.
  • first lens discussed below may also be referred to as a second lens or a third lens without departing from the teachings of the present application.
  • the thickness, size, and shape of the lens have been somewhat exaggerated for convenience of explanation.
  • the spherical or aspherical shape shown in the drawings is shown by way of example. That is, the shape of the spherical surface or the aspherical surface is not limited to the spherical or aspherical shape shown in the drawings.
  • the drawings are only examples and are not to scale.
  • a paraxial region refers to a region near the optical axis. If the surface of the lens is convex and the position of the convex surface is not defined, it indicates that the surface of the lens is convex at least in the paraxial region; if the surface of the lens is concave and the position of the concave surface is not defined, it indicates that the surface of the lens is at least in the paraxial region. Concave.
  • the surface closest to the object in each lens is referred to as the object side, and the surface of each lens closest to the image plane is referred to as the image side.
  • the imaging lens sequentially includes a first lens having positive power, a second lens having negative power, and at least one subsequent lens from the object side to the image side along the optical axis.
  • the camera lens also has a curved imaging surface.
  • the object side of the first lens may be convex.
  • the total effective focal length f of the imaging lens and the radius of curvature R1 of the first lens object side may satisfy 2 ⁇ f/R1 ⁇ 5, and more specifically, f and R1 may further satisfy 2.25 ⁇ f/R1 ⁇ 3.71.
  • the negative spherical aberration generated by the first lens can be controlled within a reasonable range, thereby causing the latter negative group member (ie, the negative optical power between the first lens and the image side).
  • Each of the lenses balances the burden of the negative spherical aberration generated by the first lens.
  • the total effective focal length f of the imaging lens and the radius of curvature RI of the imaging surface of the imaging lens may satisfy
  • the bending of the imaging surface is guaranteed to be within a reasonable range, so that the field curvature can be reasonably compensated, and the design freedom of the optical design is more, and thus the good design is obtained. Imaging quality.
  • the lens having the power closest to the imaging surface in the direction from the image side to the object side is a negative lens having a negative power (referred to as "the image side closest to the image side"
  • the negative lens ") the lens having power adjacent to the negative lens is a positive lens having a positive power (referred to herein as "a positive lens closest to the image side”).
  • the image side of the negative lens closest to the image side may be a concave surface.
  • the at least one subsequent lens may be sequentially included from the second lens to the image side along the optical axis: a third lens and a fourth lens.
  • the third lens may have a positive power
  • the fourth lens may have a negative power
  • the image side may be a concave surface.
  • the fourth lens is the negative lens closest to the image side
  • the third lens is the positive lens closest to the image side.
  • the at least one subsequent lens may be sequentially included from the second lens to the image side along the optical axis: a third lens, a fourth lens, and a fifth lens.
  • the third lens has a positive power or a negative power; the fourth lens may have a positive power; the fifth lens may have a negative power, and the image side may be a concave surface.
  • the fifth lens is the negative lens closest to the image side; the fourth lens is the positive lens closest to the image side.
  • the at least one subsequent lens may be sequentially included from the second lens to the image side along the optical axis: a third lens, a fourth lens, a fifth lens, and a sixth lens.
  • the third lens and the fourth lens each have a positive power or a negative power;
  • the fifth lens may have a positive power;
  • the sixth lens may have a negative power, and the image side may be a concave surface.
  • the sixth lens is the negative lens closest to the image side;
  • the fifth lens is the positive lens closest to the image side.
  • the at least one subsequent lens may be sequentially included from the second lens to the image side along the optical axis: a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens.
  • the third lens, the fourth lens and the fifth lens each have a positive power or a negative power;
  • the sixth lens may have a positive power;
  • the seventh lens may have a negative power, and the image side may be a concave surface.
  • the seventh lens is the negative lens closest to the image side; the sixth lens is the positive lens closest to the image side.
  • the effective focal length f1 of the first lens and the effective focal length fn of the negative lens closest to the image side may satisfy -3.0 ⁇ f1/fn ⁇ -0.5, and more specifically, f1 and fn may further satisfy -2.55 ⁇ f1/fn ⁇ -0.53.
  • the center thickness CT2 of the second lens on the optical axis and the center thickness CTn of the negative lens closest to the image side on the optical axis may satisfy 0.5 ⁇ CT2/CTn ⁇ 1.0, and more specifically, CT2 and CTn may further satisfy 0.56. ⁇ CT2 / CTn ⁇ 1.00.
  • the control of the coma aberration is obtained by controlling the ratio of the center thickness CT2 of the second lens to the center thickness CTn of the negative lens closest to the image side, so that the optical system obtains good image quality.
  • the dispersion coefficient V1 of the first lens and the dispersion coefficient Vp of the positive lens closest to the image side may satisfy 1 ⁇ V1/Vp ⁇ 3, and more specifically, V1 and Vp may further satisfy 1.00 ⁇ V1/Vp ⁇ 2.74.
  • the ratio of the dispersion coefficient V1 of the first lens to the dispersion coefficient Vp of the positive lens closest to the image side is within a reasonable range, thereby making the optical system A good ability to balance chromatic aberrations.
  • the center thickness CT1 of the first lens on the optical axis and the center thickness CTp of the positive lens closest to the image side on the optical axis may satisfy 1 ⁇ CT1/CTp ⁇ 2, and more specifically, CT1 and CTp may further satisfy 1.12. ⁇ CT1/CTp ⁇ 1.84.
  • the distortion contribution rate of both can be adjusted to control the final distortion of the system within a reasonable interval to satisfy the imaging. Claim.
  • the entrance pupil diameter EPD of the imaging lens and the maximum half-image height ImgH of the imaging lens can satisfy 0.6 ⁇ EPD / ImgH ⁇ 0.8, and more specifically, EPD and ImgH can further satisfy 0.63 ⁇ EPD / ImgH ⁇ 0.78. Satisfying the conditional expression 0.6 ⁇ EPD / ImgH ⁇ 0.8, is beneficial to achieve a large image surface, a large aperture and other beneficial effects.
  • the total effective focal length f of the imaging lens and the entrance pupil diameter EPD of the imaging lens can satisfy 1.5 ⁇ f / EPD ⁇ 2.8, and more specifically, f and EPD can further satisfy 1.70 ⁇ f / EPD ⁇ 2.67. Satisfying the conditional formula 1.5 ⁇ f/EPD ⁇ 2.8, it can ensure that the f-number of the system falls within the feasible common range, thus ensuring that the optical system can obtain a suitable signal-to-noise ratio under darker shooting conditions.
  • the on-axis distance TTL from the center of the side surface of the first lens to the imaging surface of the imaging lens can satisfy 3.0 mm ⁇ TTL ⁇ 7.5 mm, and more specifically, the TTL can further satisfy 3.45 mm ⁇ TTL ⁇ 5.30 mm. It satisfies the conditional formula 3.0mm ⁇ TTL ⁇ 7.5mm, which ensures the compactness of the optical system, so that the camera lens meets the general length requirements of a wide range of telephoto lenses from wide-angle to telephoto.
  • TTL/ImgH ⁇ 1.75 can be satisfied from the center of the first lens side to the on-axis distance TTL of the imaging lens and the maximum half-image height ImgH of the imaging lens. More specifically, TTL and ImgH can further satisfy 1.40 ⁇ TTL /ImgH ⁇ 1.71. By satisfying the conditional TTL/ImgH ⁇ 1.75, the compactness of the system can be ensured, and the ultra-thin characteristics and miniaturization of the optical imaging lens can be realized, so that the imaging lens can be suitably applied to a system of a limited size such as a portable electronic product.
  • the imaging lens may also be provided with at least one aperture to further enhance the imaging quality of the lens.
  • the aperture can be disposed at any position between the object side and the image side as needed.
  • the above-described image pickup lens may further include a filter for correcting the color deviation and/or a cover glass for protecting the photosensitive member on the image plane.
  • the imaging surface can be designed as a curved surface that conforms to the curvature of the photosensitive element, and such a design can effectively improve the image quality.
  • designing the imaging surface into a curved surface is equivalent to increasing the degree of freedom of the lens design, so that the design indexes such as the angle of view, the aperture, and the contrast can be effectively improved.
  • the imaging lens according to the above-described embodiment of the present application employs a curved imaging surface, which can effectively improve aberrations while having excellent imaging performance.
  • at least one of the mirror faces of each lens is an aspherical mirror.
  • the aspherical lens is characterized by a continuous change in curvature from the center of the lens to the periphery of the lens. Unlike a spherical lens having a constant curvature from the center of the lens to the periphery of the lens, the aspherical lens has better curvature radius characteristics, and has the advantages of improving distortion and improving astigmatic aberration. With an aspherical lens, the aberrations that occur during imaging can be eliminated as much as possible, thereby further improving the image quality.
  • the optical imaging lens is not limited to including four to seven lenses.
  • the optical imaging lens can also include other numbers of lenses if desired.
  • FIG. 1 is a block diagram showing the structure of an image pickup lens according to Embodiment 1 of the present application.
  • the imaging lens sequentially includes a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, and an imaging surface S11 from the object side to the imaging side along the optical axis.
  • the imaging surface S11 is a curved surface that is convex toward the image side at the paraxial axis.
  • the first lens E1 has a positive refractive power
  • the object side surface S1 is a convex surface
  • the image side surface S2 is a concave surface
  • the object side surface S1 and the image side surface S2 of the first lens E1 are both aspherical surfaces.
  • the second lens E2 has a negative refractive power
  • the object side surface S3 is a concave surface
  • the image side surface S4 is a concave surface
  • the object side surface S3 and the image side surface S4 of the second lens E2 are aspherical surfaces.
  • the third lens E3 has a positive refractive power
  • the object side surface S5 is a concave surface
  • the image side surface S6 is a convex surface
  • the object side surface S5 and the image side surface S6 of the third lens E3 are aspherical surfaces.
  • the fourth lens E4 has a negative refractive power
  • the object side surface S7 is a convex surface
  • the image side surface S8 is a concave surface
  • the object side surface S7 and the image side surface S8 of the fourth lens E4 are aspherical surfaces.
  • the imaging lens may further include a filter E5 having an object side S9 and an image side S10. Light from the object sequentially passes through the respective surfaces S1 to S10 and is finally imaged on the imaging plane S11.
  • a stop STO for limiting the light beam may be disposed between the object side and the first lens E1 to improve the image quality of the image pickup lens.
  • the fourth lens E4 is the negative lens closest to the image side
  • the third lens E3 is the positive lens closest to the image side
  • Table 1 shows the surface type, radius of curvature, thickness, material, and conical coefficient of each lens of the image pickup lens of Example 1, wherein the unit of the radius of curvature and the thickness are each mm (mm).
  • each lens may be an aspherical lens, and each aspherical surface type x is defined by the following formula:
  • x is the distance of the aspherical surface at height h from the optical axis, and the distance from the aspherical vertex is high;
  • k is the conic coefficient (given in Table 1);
  • Ai is the correction coefficient of the a-th order of the aspherical surface.
  • Table 2 gives the higher order coefficient A 4 , A 6 , A 8 , A 10 , A 12 , A 14 , A 16 , A 18 and A 20 which can be used for each aspherical mirror surface S1-S8 in the embodiment 1. .
  • Table 3 gives the effective focal lengths f1 to f4 of the lenses in Embodiment 1, the total effective focal length f of the image pickup lens, and the optical total length TTL of the image pickup lens (that is, from the center of the object side surface S1 of the first lens E1 to the image plane S11). The distance on the optical axis) and the maximum half angle of view HFOV of the camera lens.
  • the radius of curvature RI of the imaging plane S11 satisfies
  • 2A shows an axial chromatic aberration curve of the imaging lens of Embodiment 1, which indicates that light of different wavelengths is deviated from a focus point after passing through the lens.
  • 2B shows an astigmatism curve of the imaging lens of Embodiment 1, which shows meridional field curvature and sagittal image plane curvature.
  • Fig. 2C shows the distortion curve of the image pickup lens of Embodiment 1, which shows the distortion magnitude value in the case of different viewing angles.
  • 2D shows a magnification chromatic aberration curve of the imaging lens of Embodiment 1, which indicates a deviation of different image heights on the imaging plane after the light passes through the lens.
  • the imaging lens given in Embodiment 1 can achieve good imaging quality.
  • FIG. 3 is a block diagram showing the structure of an image pickup lens according to Embodiment 2 of the present application.
  • the imaging lens sequentially includes a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, and an imaging surface S11 from the object side to the imaging side along the optical axis.
  • the imaging surface S11 is a curved surface that is convex toward the image side at the paraxial axis.
  • the first lens E1 has a positive refractive power
  • the object side surface S1 is a convex surface
  • the image side surface S2 is a concave surface
  • the object side surface S1 and the image side surface S2 of the first lens E1 are both aspherical surfaces.
  • the second lens E2 has a negative refractive power
  • the object side surface S3 is a concave surface
  • the image side surface S4 is a concave surface
  • the object side surface S3 and the image side surface S4 of the second lens E2 are aspherical surfaces.
  • the third lens E3 has a positive refractive power
  • the object side surface S5 is a concave surface
  • the image side surface S6 is a convex surface
  • the object side surface S5 and the image side surface S6 of the third lens E3 are aspherical surfaces.
  • the fourth lens E4 has a negative refractive power
  • the object side surface S7 is a convex surface
  • the image side surface S8 is a concave surface
  • the object side surface S7 and the image side surface S8 of the fourth lens E4 are aspherical surfaces.
  • the imaging lens may further include a filter E5 having an object side S9 and an image side S10. Light from the object sequentially passes through the respective surfaces S1 to S10 and is finally imaged on the imaging plane S11.
  • a stop STO for limiting the light beam may be disposed between the object side and the first lens E1 to improve the image quality of the image pickup lens.
  • the fourth lens E4 is the negative lens closest to the image side
  • the third lens E3 is the positive lens closest to the image side
  • Table 4 shows the surface type, the radius of curvature, the thickness, the material, and the conical coefficient of each lens of the image pickup lens of Example 2, wherein the units of the radius of curvature and the thickness are each mm (mm).
  • Table 5 shows the high order term coefficients which can be used for each aspherical mirror surface in Embodiment 2, wherein each aspherical surface type can be defined by the formula (1) given in the above Embodiment 1.
  • Table 6 shows the effective focal lengths f1 to f4 of the respective lenses in Embodiment 2, the total effective focal length f of the imaging lens, the optical total length TTL of the imaging lens, and the maximum half angle of view HFOV of the imaging lens.
  • 4A is a view showing an axial chromatic aberration curve of the image pickup lens of Embodiment 2, which shows that light rays of different wavelengths are deviated from a focus point after passing through the lens.
  • 4B shows an astigmatism curve of the imaging lens of Embodiment 2, which shows meridional field curvature and sagittal image plane curvature.
  • Fig. 4C shows a distortion curve of the image pickup lens of Embodiment 2, which shows the distortion magnitude value in the case of different viewing angles.
  • 4D shows a magnification chromatic aberration curve of the imaging lens of Embodiment 2, which shows deviations of different image heights on the imaging plane after the light passes through the lens.
  • the imaging lens given in Embodiment 2 can achieve good imaging quality.
  • FIG. 5 is a block diagram showing the structure of an image pickup lens according to Embodiment 3 of the present application.
  • the imaging lens sequentially includes a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, and an imaging surface S11 from the object side to the imaging side along the optical axis.
  • the imaging surface S11 is a curved surface that is convex toward the image side at the paraxial axis.
  • the first lens E1 has a positive refractive power
  • the object side surface S1 is a convex surface
  • the image side surface S2 is a concave surface
  • the object side surface S1 and the image side surface S2 of the first lens E1 are both aspherical surfaces.
  • the second lens E2 has a negative refractive power
  • the object side surface S3 is a convex surface
  • the image side surface S4 is a concave surface
  • the object side surface S3 and the image side surface S4 of the second lens E2 are aspherical surfaces.
  • the third lens E3 has a positive refractive power
  • the object side surface S5 is a concave surface
  • the image side surface S6 is a convex surface
  • the object side surface S5 and the image side surface S6 of the third lens E3 are aspherical surfaces.
  • the fourth lens E4 has a negative refractive power
  • the object side surface S7 is a convex surface
  • the image side surface S8 is a concave surface
  • the object side surface S7 and the image side surface S8 of the fourth lens E4 are aspherical surfaces.
  • the imaging lens may further include a filter E5 having an object side S9 and an image side S10. Light from the object sequentially passes through the respective surfaces S1 to S10 and is finally imaged on the imaging plane S11.
  • a stop STO for limiting the light beam may be disposed between the object side and the first lens E1 to improve the image quality of the image pickup lens.
  • the fourth lens E4 is the negative lens closest to the image side
  • the third lens E3 is the positive lens closest to the image side
  • Table 7 shows the surface type, the radius of curvature, the thickness, the material, and the conical coefficient of each lens of the image pickup lens of Example 3, wherein the units of the radius of curvature and the thickness are each mm (mm).
  • Table 8 shows the high order term coefficients which can be used for the respective aspherical mirrors in Embodiment 3, wherein each aspherical surface type can be defined by the formula (1) given in the above Embodiment 1.
  • Table 9 shows the effective focal lengths f1 to f4 of the lenses in Embodiment 3, the total effective focal length f of the imaging lens, the optical total length TTL of the imaging lens, and the maximum half angle of view HFOV of the imaging lens.
  • Fig. 6A shows an axial chromatic aberration curve of the image pickup lens of Embodiment 3, which shows that light of different wavelengths is deviated from a focus point after passing through the lens.
  • Fig. 6B shows an astigmatism curve of the image pickup lens of Embodiment 3, which shows meridional field curvature and sagittal image plane curvature.
  • Fig. 6C shows a distortion curve of the image pickup lens of Embodiment 3, which shows the distortion magnitude value in the case of different viewing angles.
  • Fig. 6D shows a magnification chromatic aberration curve of the image pickup lens of Embodiment 3, which shows deviations of different image heights on the image plane after the light passes through the lens. 6A to 6D, the imaging lens given in Embodiment 3 can achieve good imaging quality.
  • FIG. 7 is a block diagram showing the structure of an image pickup lens according to Embodiment 4 of the present application.
  • the imaging lens sequentially includes a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and an imaging surface S13 from the object side to the imaging side along the optical axis.
  • the imaging surface S13 is a curved surface that is convex toward the object side at the paraxial axis.
  • the first lens E1 has a positive refractive power
  • the object side surface S1 is a convex surface
  • the image side surface S2 is a convex surface
  • the object side surface S1 and the image side surface S2 of the first lens E1 are aspherical surfaces.
  • the second lens E2 has a negative refractive power
  • the object side surface S3 is a convex surface
  • the image side surface S4 is a concave surface
  • the object side surface S3 and the image side surface S4 of the second lens E2 are aspherical surfaces.
  • the third lens E3 has a negative refractive power
  • the object side surface S5 is a convex surface
  • the image side surface S6 is a concave surface
  • the object side surface S5 and the image side surface S6 of the third lens E3 are aspherical surfaces.
  • the fourth lens E4 has a positive refractive power, the object side surface S7 is a concave surface, the image side surface S8 is a convex surface, and the object side surface S7 and the image side surface S8 of the fourth lens E4 are aspherical surfaces.
  • the fifth lens E5 has a negative refractive power
  • the object side surface S9 is a concave surface
  • the image side surface S10 is a concave surface
  • the object side surface S9 and the image side surface S10 of the fifth lens E5 are aspherical surfaces.
  • the imaging lens may further include a filter E6 having an object side S11 and an image side S12. Light from the object sequentially passes through the respective surfaces S1 to S12 and is finally imaged on the imaging plane S13.
  • a filter E6 having an object side S11 and an image side S12. Light from the object sequentially passes through the respective surfaces S1 to S12 and is finally imaged on the imaging plane S13.
  • a stop STO for limiting the light beam may be disposed between the object side and the first lens E1 to improve the image quality of the image pickup lens.
  • the fifth lens E5 is the negative lens closest to the image side
  • the fourth lens E4 is the positive lens closest to the image side
  • Table 10 shows the surface type, the radius of curvature, the thickness, the material, and the conical coefficient of each lens of the image pickup lens of Example 4, wherein the units of the radius of curvature and the thickness are each mm (mm).
  • Table 11 shows the high order coefficient which can be used for each aspherical mirror in Embodiment 4, wherein each aspherical surface type can be defined by the formula (1) given in the above Embodiment 1.
  • Table 12 shows the effective focal lengths f1 to f5 of the respective lenses in Embodiment 4, the total effective focal length f of the image pickup lens, the optical total length TTL of the image pickup lens, and the maximum half angle of view HFOV of the image pickup lens.
  • Fig. 8A shows an axial chromatic aberration curve of the imaging lens of Embodiment 4, which shows that light of different wavelengths is deviated from a focus point after passing through the lens.
  • Fig. 8B shows an astigmatism curve of the image pickup lens of Embodiment 4, which shows meridional field curvature and sagittal image plane curvature.
  • Fig. 8C shows the distortion curve of the image pickup lens of Embodiment 4, which shows the distortion magnitude value in the case of different viewing angles.
  • Fig. 8D shows a magnification chromatic aberration curve of the imaging lens of Embodiment 4, which shows deviations of different image heights on the imaging plane after the light passes through the lens. 8A to 8D, the imaging lens given in Embodiment 4 can achieve good imaging quality.
  • FIG. 9 is a block diagram showing the structure of an image pickup lens according to Embodiment 5 of the present application.
  • the imaging lens sequentially includes a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens E6 from the object side to the imaging side along the optical axis.
  • imaging plane S15 is a curved surface that is convex toward the image side at the paraxial axis.
  • the first lens E1 has a positive refractive power
  • the object side surface S1 is a convex surface
  • the image side surface S2 is a concave surface
  • the object side surface S1 and the image side surface S2 of the first lens E1 are both aspherical surfaces.
  • the second lens E2 has a negative refractive power
  • the object side surface S3 is a convex surface
  • the image side surface S4 is a concave surface
  • the object side surface S3 and the image side surface S4 of the second lens E2 are aspherical surfaces.
  • the third lens E3 has a positive refractive power
  • the object side surface S5 is a convex surface
  • the image side surface S6 is a concave surface
  • the object side surface S5 and the image side surface S6 of the third lens E3 are aspherical surfaces.
  • the fourth lens E4 has a negative refractive power
  • the object side surface S7 is a concave surface
  • the image side surface S8 is a convex surface
  • the object side surface S7 and the image side surface S8 of the fourth lens E4 are aspherical surfaces.
  • 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 object side surface S9 and the image side surface S10 of the fifth lens E5 are aspherical surfaces.
  • the sixth lens E6 has a negative refractive power, the object side surface S11 is a concave surface, the image side surface S12 is a concave surface, and the object side surface S11 and the image side surface S12 of the sixth lens E6 are aspherical surfaces.
  • the imaging lens may further include a filter E7 having an object side S13 and an image side S14. Light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging plane S15.
  • a filter E7 having an object side S13 and an image side S14. Light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging plane S15.
  • a stop STO for limiting the light beam may be disposed between the first lens E1 and the second lens E2 to improve the imaging quality of the imaging lens.
  • the sixth lens E6 is the negative lens closest to the image side
  • the fifth lens E5 is the positive lens closest to the image side
  • Table 13 shows the surface type, the radius of curvature, the thickness, the material, and the conical coefficient of each lens of the image pickup lens of Example 5, wherein the unit of the radius of curvature and the thickness are each mm (mm).
  • Table 14 shows the high order coefficient which can be used for each aspherical mirror surface in Embodiment 5, wherein each aspherical surface type can be defined by the formula (1) given in the above Embodiment 1.
  • Table 15 shows the effective focal lengths f1 to f6 of the respective lenses in Embodiment 5, the total effective focal length f of the imaging lens, the optical total length TTL of the imaging lens, and the maximum half angle of view HFOV of the imaging lens.
  • Fig. 10A shows an axial chromatic aberration curve of the image pickup lens of Embodiment 5, which shows that light of different wavelengths is deviated from a focus point after passing through the lens.
  • Fig. 10B shows an astigmatism curve of the imaging lens of Embodiment 5, which shows meridional field curvature and sagittal image plane curvature.
  • Fig. 10C shows a distortion curve of the image pickup lens of Embodiment 5, which shows the distortion magnitude value in the case of different viewing angles.
  • Fig. 10D shows a magnification chromatic aberration curve of the imaging lens of Embodiment 5, which shows deviations of different image heights on the imaging plane after the light passes through the lens. 10A to 10D, the imaging lens given in Embodiment 5 can achieve good imaging quality.
  • FIG. 11 is a block diagram showing the structure of an image pickup lens according to Embodiment 6 of the present application.
  • the imaging lens sequentially includes a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens E6 from the object side to the imaging side along the optical axis.
  • the imaging surface S15 is a curved surface that is convex toward the image side at the paraxial axis.
  • the first lens E1 has a positive refractive power
  • the object side surface S1 is a convex surface
  • the image side surface S2 is a concave surface
  • the object side surface S1 and the image side surface S2 of the first lens E1 are both aspherical surfaces.
  • the second lens E2 has a negative refractive power
  • the object side surface S3 is a convex surface
  • the image side surface S4 is a concave surface
  • the object side surface S3 and the image side surface S4 of the second lens E2 are aspherical surfaces.
  • the third lens E3 has a positive refractive power
  • the object side surface S5 is a convex surface
  • the image side surface S6 is a concave surface
  • the object side surface S5 and the image side surface S6 of the third lens E3 are aspherical surfaces.
  • the fourth lens E4 has a positive refractive power, the object side surface S7 is a convex surface, the image side surface S8 is a concave surface, and the object side surface S7 and the image side surface S8 of the fourth lens E4 are aspherical surfaces.
  • 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 object side surface S9 and the image side surface S10 of the fifth lens E5 are aspherical surfaces.
  • the sixth lens E6 has a positive refractive power, the object side surface S11 is a concave surface, the image side surface S12 is a convex surface, and the object side surface S11 and the image side surface S12 of the sixth lens E6 are aspherical surfaces.
  • 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 concave surface
  • the object side surface S13 and the image side surface S14 of the seventh lens E7 are aspherical surfaces.
  • a stop STO for limiting the light beam may be disposed between the third lens E3 and the fourth lens E4 to improve the imaging quality of the image pickup lens.
  • the seventh lens E7 is the negative lens closest to the image side
  • the sixth lens E6 is the positive lens closest to the image side
  • Table 16 shows the surface type, the radius of curvature, the thickness, the material, and the conical coefficient of each lens of the image pickup lens of Example 6, wherein the units of the radius of curvature and the thickness are each mm (mm).
  • Table 17 shows the high order coefficient which can be used for each aspherical mirror surface in Embodiment 6, wherein each aspherical surface type can be defined by the formula (1) given in the above Embodiment 1.
  • Table 18 shows the effective focal lengths f1 to f7 of the respective lenses in Embodiment 6, the total effective focal length f of the imaging lens, the optical total length TTL of the imaging lens, and the maximum half angle of view HFOV of the imaging lens.
  • Fig. 12A is a view showing an axial chromatic aberration curve of the image pickup lens of Embodiment 6, which shows that light rays of different wavelengths are deviated from a focus point after passing through the lens.
  • Fig. 12B shows an astigmatism curve of the image pickup lens of Embodiment 6, which shows the meridional field curvature and the sagittal image plane curvature.
  • Fig. 12C shows a distortion curve of the image pickup lens of Embodiment 6, which shows the distortion magnitude value in the case of different viewing angles.
  • Fig. 12D shows a magnification chromatic aberration curve of the image pickup lens of Example 6, which shows the deviation of the different image heights on the image plane after the light passes through the lens. 12A to 12D, the imaging lens given in Embodiment 6 can achieve good imaging quality.
  • FIG. 13 is a block diagram showing the structure of an image pickup lens according to Embodiment 7 of the present application.
  • the imaging lens sequentially includes a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens E6 from the object side to the imaging side along the optical axis.
  • the imaging surface S15 is a curved surface that is convex toward the image side at the paraxial axis.
  • the first lens E1 has a positive refractive power
  • the object side surface S1 is a convex surface
  • the image side surface S2 is a concave surface
  • the object side surface S1 of the first lens E1 is aspherical
  • the image side surface S2 is a spherical surface.
  • the second lens E2 has a negative refractive power
  • the object side surface S3 is a convex surface
  • the image side surface S4 is a concave surface
  • the object side surface S3 of the second lens E2 is a spherical surface
  • the image side surface S4 is an aspherical surface.
  • the third lens E3 has a positive refractive power
  • the object side surface S5 is a convex surface
  • the image side surface S6 is a concave surface
  • the object side surface S5 and the image side surface S6 of the third lens E3 are aspherical surfaces.
  • the fourth lens E4 has a positive refractive power, the object side surface S7 is a convex surface, the image side surface S8 is a concave surface, and the object side surface S7 and the image side surface S8 of the fourth lens E4 are aspherical surfaces.
  • 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 object side surface S9 and the image side surface S10 of the fifth lens E5 are aspherical surfaces.
  • the sixth lens E6 has a positive refractive power, the object side surface S11 is a concave surface, the image side surface S12 is a convex surface, and the object side surface S11 and the image side surface S12 of the sixth lens E6 are aspherical surfaces.
  • 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 concave surface
  • the object side surface S13 and the image side surface S14 of the seventh lens E7 are aspherical surfaces.
  • a stop STO for limiting the light beam may be disposed between the third lens E3 and the fourth lens E4 to improve the imaging quality of the image pickup lens.
  • the seventh lens E7 is the negative lens closest to the image side
  • the sixth lens E6 is the positive lens closest to the image side
  • Table 19 shows the surface type, radius of curvature, thickness, material, and conical coefficient of each lens of the image pickup lens of Example 7, wherein the units of the radius of curvature and the thickness are each mm (mm).
  • Table 20 shows the high order term coefficients which can be used for the respective aspherical mirrors in Embodiment 7, wherein each aspherical surface type can be defined by the formula (1) given in the above Embodiment 1.
  • Table 21 shows the effective focal lengths f1 to f7 of the respective lenses in Embodiment 7, the total effective focal length f of the imaging lens, the optical total length TTL of the imaging lens, and the maximum half angle of view HFOV of the imaging lens.
  • Fig. 14A shows an axial chromatic aberration curve of the image pickup lens of Embodiment 7, which indicates that light of different wavelengths is deviated from a focus point after passing through the lens.
  • Fig. 14B shows an astigmatism curve of the image pickup lens of Embodiment 7, which shows the meridional field curvature and the sagittal image plane curvature.
  • Fig. 14C shows a distortion curve of the image pickup lens of Embodiment 7, which shows the distortion magnitude value in the case of different viewing angles.
  • Fig. 14D shows a magnification chromatic aberration curve of the imaging lens of Embodiment 7, which shows the deviation of the different image heights on the imaging plane after the light passes through the lens. 14A to 14D, the imaging lens given in Embodiment 7 can achieve good imaging quality.
  • FIG. 15 is a view showing the configuration of an image pickup lens according to Embodiment 8 of the present application.
  • the imaging lens sequentially includes a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens E6 from the object side to the imaging side along the optical axis.
  • the imaging surface S15 is a curved surface that is convex toward the image side at the paraxial axis.
  • the first lens E1 has a positive refractive power
  • the object side surface S1 is a convex surface
  • the image side surface S2 is a concave surface
  • the object side surface S1 and the image side surface S2 of the first lens E1 are both aspherical surfaces.
  • the second lens E2 has a negative refractive power
  • the object side surface S3 is a convex surface
  • the image side surface S4 is a concave surface
  • the object side surface S3 and the image side surface S4 of the second lens E2 are aspherical surfaces.
  • the fourth lens E4 has a positive refractive power, the object side surface S7 is a convex surface, the image side surface S8 is a concave surface, and the object side surface S7 and the image side surface S8 of the fourth lens E4 are aspherical surfaces.
  • 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 object side surface S9 and the image side surface S10 of the fifth lens E5 are aspherical surfaces.
  • the sixth lens E6 has a positive refractive power, the object side surface S11 is a concave surface, the image side surface S12 is a convex surface, and the object side surface S11 and the image side surface S12 of the sixth lens E6 are aspherical surfaces.
  • 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 concave surface
  • the object side surface S13 and the image side surface S14 of the seventh lens E7 are aspherical surfaces.
  • the seventh lens E7 is the negative lens closest to the image side
  • the sixth lens E6 is the positive lens closest to the image side
  • Table 22 shows the surface type, the radius of curvature, the thickness, the material, and the conical coefficient of each lens of the image pickup lens of Example 8, wherein the unit of the radius of curvature and the thickness are each mm (mm).
  • Table 23 shows the high order term coefficients which can be used for the respective aspherical mirrors in Embodiment 8, wherein each aspherical surface type can be defined by the formula (1) given in the above Embodiment 1.
  • Table 24 shows the effective focal lengths f1 to f7 of the respective lenses in Embodiment 8, the total effective focal length f of the imaging lens, the optical total length TTL of the imaging lens, and the maximum half angle of view HFOV of the imaging lens.
  • Fig. 16A shows an axial chromatic aberration curve of the image pickup lens of Example 8, which shows that light rays of different wavelengths are deviated from the focus point after passing through the lens.
  • Fig. 16B shows an astigmatism curve of the image pickup lens of Embodiment 8, which shows meridional field curvature and sagittal image plane curvature.
  • Fig. 16C shows a distortion curve of the image pickup lens of Embodiment 8, which shows the distortion magnitude value in the case of different viewing angles.
  • Fig. 16D shows a magnification chromatic aberration curve of the image pickup lens of Example 8, which shows the deviation of the different image heights on the image plane after the light passes through the lens. 16A to 16D, the imaging lens given in Embodiment 8 can achieve good imaging quality.
  • the imaging lens sequentially includes a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens E6 from the object side to the imaging side along the optical axis.
  • the imaging surface S15 is a curved surface that is convex toward the image side at the paraxial axis.
  • the first lens E1 has a positive refractive power
  • the object side surface S1 is a convex surface
  • the image side surface S2 is a concave surface
  • the object side surface S1 and the image side surface S2 of the first lens E1 are both aspherical surfaces.
  • the second lens E2 has a negative refractive power
  • the object side surface S3 is a convex surface
  • the image side surface S4 is a concave surface
  • the object side surface S3 and the image side surface S4 of the second lens E2 are aspherical surfaces.
  • the third lens E3 has a positive refractive power
  • the object side surface S5 is a convex surface
  • the image side surface S6 is a concave surface
  • the object side surface S5 and the image side surface S6 of the third lens E3 are aspherical surfaces.
  • the fourth lens E4 has a positive refractive power, the object side surface S7 is a convex surface, the image side surface S8 is a concave surface, and the object side surface S7 and the image side surface S8 of the fourth lens E4 are aspherical surfaces.
  • 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 object side surface S9 and the image side surface S10 of the fifth lens E5 are aspherical surfaces.
  • the sixth lens E6 has a positive refractive power, the object side surface S11 is a concave surface, the image side surface S12 is a convex surface, and the object side surface S11 and the image side surface S12 of the sixth lens E6 are aspherical surfaces.
  • a stop STO for limiting the light beam may be disposed between the third lens E3 and the fourth lens E4 to improve the imaging quality of the image pickup lens.
  • the seventh lens E7 is the negative lens closest to the image side
  • the sixth lens E6 is the positive lens closest to the image side
  • Table 25 shows the surface type, the radius of curvature, the thickness, the material, and the conical coefficient of each lens of the image pickup lens of Example 9, wherein the units of the radius of curvature and the thickness are each mm (mm).
  • Table 26 shows the high order term coefficients which can be used for the respective aspherical mirrors in Embodiment 9, wherein each aspherical surface type can be defined by the formula (1) given in the above Embodiment 1.
  • Table 27 shows the effective focal lengths f1 to f7 of the lenses in Embodiment 9, the total effective focal length f of the imaging lens, the optical total length TTL of the imaging lens, and the maximum half angle of view HFOV of the imaging lens.
  • Fig. 18A shows an axial chromatic aberration curve of the image pickup lens of Example 9, which shows that light rays of different wavelengths are deviated from the focus point after passing through the lens.
  • Fig. 18B shows an astigmatism curve of the image pickup lens of Embodiment 9, which shows meridional field curvature and sagittal image plane curvature.
  • Fig. 18C shows a distortion curve of the image pickup lens of Embodiment 9, which shows the distortion magnitude value in the case of different viewing angles.
  • Fig. 18D shows a magnification chromatic aberration curve of the image pickup lens of Example 9, which shows the deviation of the different image heights on the image plane after the light passes through the lens.
  • the imaging lens given in Embodiment 9 can achieve good imaging quality.
  • FIG. 19 is a block diagram showing the structure of an image pickup lens according to Embodiment 10 of the present application.
  • the imaging lens sequentially includes a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens E6 from the object side to the imaging side along the optical axis.
  • the imaging surface S15 is a curved surface that is convex toward the image side at the paraxial axis.
  • the first lens E1 has a positive refractive power
  • the object side surface S1 is a convex surface
  • the image side surface S2 is a concave surface
  • the object side surface S1 and the image side surface S2 of the first lens E1 are aspherical surfaces.
  • the second lens E2 has a negative refractive power
  • the object side surface S3 is a convex surface
  • the image side surface S4 is a concave surface
  • the object side surface S3 and the image side surface S4 of the second lens E2 are aspherical surfaces.
  • the third lens E3 has a positive refractive power
  • the object side surface S5 is a convex surface
  • the image side surface S6 is a concave surface
  • the object side surface S5 and the image side surface S6 of the third lens E3 are aspherical surfaces.
  • the fourth lens E4 has a positive refractive power, the object side surface S7 is a convex surface, the image side surface S8 is a concave surface, and the object side surface S7 and the image side surface S8 of the fourth lens E4 are aspherical surfaces.
  • 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 object side surface S9 and the image side surface S10 of the fifth lens E5 are aspherical surfaces.
  • the sixth lens E6 has a positive refractive power, the object side surface S11 is a concave surface, the image side surface S12 is a convex surface, and the object side surface S11 and the image side surface S12 of the sixth lens E6 are aspherical surfaces.
  • 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 concave surface
  • the object side surface S13 and the image side surface S14 of the seventh lens E7 are aspherical surfaces.
  • a stop STO for limiting the light beam may be disposed between the third lens E3 and the fourth lens E4 to improve the imaging quality of the image pickup lens.
  • the seventh lens E7 is the negative lens closest to the image side
  • the sixth lens E6 is the positive lens closest to the image side
  • Table 28 shows the surface type, the radius of curvature, the thickness, the material, and the conical coefficient of each lens of the image pickup lens of Example 10, wherein the units of the radius of curvature and the thickness are each mm (mm).
  • Table 29 shows the high order coefficient which can be used for each aspherical mirror surface in Embodiment 10, wherein each aspherical surface type can be defined by the formula (1) given in the above Embodiment 1.
  • Table 30 shows the effective focal lengths f1 to f7 of the respective lenses in Embodiment 10, the total effective focal length f of the imaging lens, the optical total length TTL of the imaging lens, and the maximum half angle of view HFOV of the imaging lens.
  • Fig. 20A shows an axial chromatic aberration curve of the imaging lens of Embodiment 10, which shows that light rays of different wavelengths are deviated from the focus point after the lens.
  • Fig. 20B shows an astigmatism curve of the imaging lens of Embodiment 10, which shows meridional field curvature and sagittal image plane curvature.
  • Fig. 20C shows a distortion curve of the image pickup lens of Embodiment 10, which shows the distortion magnitude value in the case of different viewing angles.
  • Fig. 20D shows a magnification chromatic aberration curve of the image pickup lens of Example 10, which shows the deviation of the different image heights on the image plane after the light passes through the lens.
  • the imaging lens given in Embodiment 10 can achieve good imaging quality.
  • Embodiments 1 to 10 respectively satisfy the relationships shown in Table 31 below.
  • the 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 camera device may be an independent camera device such as a digital camera, or may be a camera module integrated on a mobile electronic device such as a mobile phone.
  • the image pickup apparatus is equipped with the image pickup lens described above.

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Abstract

一种摄像镜头，该摄像镜头沿光轴由物侧至像侧依序包括：具有正光焦度的第一透镜（E1）、具有负光焦度的第二透镜（E2）和至少一个后续透镜（E3-E4）。其中，摄像镜头最靠近像侧的透镜为具有负光焦度的负透镜（E4），与该负透镜（E4）相邻的透镜为具有正光焦度的正透镜（E3）。摄像镜头还包括弯曲的成像面（S11），成像面（S11）的曲率半径RI与摄像镜头的总有效焦距f满足|f/RI|≤0.35。

Description

摄像镜头
相关申请的交叉引用
本申请要求于2017年8月23日提交于中国国家知识产权局(SIPO)的、专利申请号为201710730290.9的中国专利申请以及于2017年8月23日提交至SIPO的、专利申请号为201721061388.1的中国专利申请的优先权和权益，以上中国专利申请通过引用整体并入本文。
技术领域
本申请涉及一种摄像镜头，更具体地，本申请涉及一种具有弯曲成像面的摄像镜头。
背景技术
目前，光学系统常用的感光元件有CCD(Charge-Coupled Device，感光耦合元件)及CMOS(Complementary Metal-Oxide Semiconductor，互补性氧化金属半导体元件)。随着这些常用感光元件性能的提高及尺寸减小，对相配套使用的摄像镜头的高成像品质及小型化提出了相应的要求。
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摄像镜头。
一方面，本申请提供了一种摄像镜头，该摄像镜头沿光轴由物侧至像侧依序可包括：具有正光焦度的第一透镜、具有负光焦度的第二透镜和至少一个后续透镜。其中，摄像镜头最靠近像侧的透镜为具有负光焦度的负透镜，与负透镜相邻的透镜为具有正光焦度的正透镜，摄像镜头还可包括弯曲的成像面，成像面的曲率半径RI与摄像镜头的总有效焦距f可满足|f/RI|≤0.35。
在一个实施方式中，上述至少一个后续透镜沿光轴由第二透镜至 像侧依序包括：第三透镜和第四透镜，第三透镜可具有正光焦度；以及第四透镜可具有负光焦度，其像侧面可为凹面。
在一个实施方式中，上述至少一个后续透镜沿光轴由第二透镜至像侧依序包括：第三透镜、第四透镜和第五透镜，第三透镜具有正光焦度或负光焦度；第四透镜可具有正光焦度；以及第五透镜可具有负光焦度，其像侧面可为凹面。
在一个实施方式中，上述至少一个后续透镜沿光轴由第二透镜至像侧依序包括：第三透镜、第四透镜、第五透镜和第六透镜，第三透镜和第四透镜均具有正光焦度或负光焦度；第五透镜可具有正光焦度；以及第六透镜可具有负光焦度，其像侧面可为凹面。
在一个实施方式中，上述至少一个后续透镜沿光轴由第二透镜至像侧依序包括：第三透镜、第四透镜、第五透镜、第六透镜和第七透镜，第三透镜、第四透镜和第五透镜均具有正光焦度或负光焦度；第六透镜可具有正光焦度；以及第七透镜可具有负光焦度，其像侧面可为凹面。
在一个实施方式中，第一透镜的物侧面可为凸面，其物侧面的曲率半径R1与摄像镜头的总有效焦距f可满足2＜f/R1＜5。
在一个实施方式中，第一透镜的有效焦距f1与所述负透镜的有效焦距fn可满足-3.0＜f1/fn≤-0.5。
在一个实施方式中，第二透镜于光轴上的中心厚度CT2与所述负透镜于光轴上的中心厚度CTn可满足0.5≤CT2/CTn≤1.0。
在一个实施方式中，第一透镜的色散系数V1与所述正透镜的色散系数Vp可满足1≤V1/Vp＜3。
在一个实施方式中，第一透镜于光轴上的中心厚度CT1与所述正透镜于光轴上的中心厚度CTp可满足1＜CT1/CTp＜2。
在一个实施方式中，摄像镜头的入瞳直径EPD与摄像镜头的最大半像高ImgH可满足0.6≤EPD/ImgH≤0.8。
在一个实施方式中，摄像镜头的总有效焦距f与摄像镜头的入瞳直径EPD可满足1.5≤f/EPD≤2.8。
在一个实施方式中，第一透镜的物侧面至成像面的轴上距离TTL 可满足3.0mm＜TTL＜7.5mm。
在一个实施方式中，第一透镜的物侧面至成像面的轴上距离TTL与摄像镜头的最大半像高ImgH可满足TTL/ImgH≤1.75。
另一方面，本申请提供了一种摄像镜头，该摄像镜头沿光轴由物侧至像侧依序可包括：具有正光焦度的第一透镜、具有负光焦度的第二透镜和至少一个后续透镜。其中，摄像镜头最靠近像侧的透镜为具有负光焦度的负透镜，与负透镜相邻的透镜为具有正光焦度的正透镜，摄像镜头还可包括弯曲的成像面，第一透镜的物侧面至成像面的轴上距离TTL与摄像镜头的最大半像高ImgH可满足TTL/ImgH≤1.75。
本申请所提供的设置有弯曲成像面的摄像镜头，能够在保证镜头性能的同时有效地改善像差。
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的摄像镜头的结构示意图；
图2A至图2D分别示出了实施例1的摄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的摄像镜头的结构示意图；
图4A至图4D分别示出了实施例2的摄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的摄像镜头的结构示意图；
图6A至图6D分别示出了实施例3的摄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的摄像镜头的结构示意图；
图8A至图8D分别示出了实施例4的摄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的摄像镜头的结构示意图；
图10A至图10D分别示出了实施例5的摄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的摄像镜头的结构示意图；
图12A至图12D分别示出了实施例6的摄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的摄像镜头的结构示意图；
图14A至图14D分别示出了实施例7的摄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的摄像镜头的结构示意图；
图16A至图16D分别示出了实施例8的摄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17示出了根据本申请实施例9的摄像镜头的结构示意图；
图18A至图18D分别示出了实施例9的摄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19示出了根据本申请实施例10的摄像镜头的结构示意图；
图20A至图20D分别示出了实施例10的摄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。每个透镜中最靠近物体的表面称为物侧面，每个透镜中最靠近成像面的表面称为像侧面。
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摄像镜头沿着光轴从物侧至像侧依序包括具有正光焦度的第一透镜、具有负光焦度的第二透镜和至少一个后续透镜。摄像镜头还具有一弯曲的成像面。
第一透镜的物侧面可为凸面。摄像镜头的总有效焦距f与第一透镜物侧面的曲率半径R1之间可满足2＜f/R1＜5，更具体地，f和R1进一步可满足2.25≤f/R1≤3.71。通过控制第一透镜的曲率半径的范围，能够将第一透镜产生的负球差控制在合理的区间范围，进而使得后面负组员(即，第一透镜与像侧之间具有负光焦度的各透镜)平衡 由第一透镜所产生的负球差的负担适中。
摄像镜头的总有效焦距f与摄像镜头的成像面的曲率半径RI之间可满足|f/RI|≤0.35，更具体地，f和RI进一步可满足0.04≤|f/RI|≤0.30。通过条件式|f/RI|≤0.35的约束，保证成像面的弯曲在一定的合理范围内，从而能够合理的补偿场曲量，使得光学设计的到更多的设计自由度，进而获得良好的成像质量。
在示例性实施方式的摄像镜头中，沿像侧至物侧的方向，最靠近成像面的具有光焦度的透镜为具有负光焦度的负透镜(在本文中称“最靠近像侧的负透镜”)，与该负透镜相邻的具有光焦度的透镜为具有正光焦度的正透镜(在本文中称“最靠近像侧的正透镜”)。最靠近像侧的负透镜的像侧面可为凹面。
在一个实施方式中，至少一个后续透镜沿着光轴由第二透镜至像侧可依序包括：第三透镜和第四透镜。其中，第三透镜可具有正光焦度；第四透镜可具有负光焦度，其像侧面可为凹面。在该实施方式中，第四透镜为最靠近像侧的负透镜；第三透镜为最靠近像侧的正透镜。
在一个实施方式中，至少一个后续透镜沿着光轴由第二透镜至像侧可依序包括：第三透镜、第四透镜和第五透镜。其中，第三透镜具有正光焦度或负光焦度；第四透镜可具有正光焦度；第五透镜可具有负光焦度，其像侧面可为凹面。在该实施方式中，第五透镜为最靠近像侧的负透镜；第四透镜为最靠近像侧的正透镜。
在一个实施方式中，至少一个后续透镜沿着光轴由第二透镜至像侧可依序包括：第三透镜、第四透镜、第五透镜和第六透镜。其中，第三透镜和第四透镜均具有正光焦度或负光焦度；第五透镜可具有正光焦度；以及第六透镜可具有负光焦度，其像侧面可为凹面。在该实施方式中，第六透镜为最靠近像侧的负透镜；第五透镜为最靠近像侧的正透镜。
在一个实施方式中，至少一个后续透镜沿着光轴由第二透镜至像侧可依序包括：第三透镜、第四透镜、第五透镜、第六透镜和第七透镜。其中，第三透镜、第四透镜和第五透镜均具有正光焦度或负光焦度；第六透镜可具有正光焦度；第七透镜可具有负光焦度，其像侧面 可为凹面。在该实施方式中，第七透镜为最靠近像侧的负透镜；第六透镜为最靠近像侧的正透镜。
第一透镜的有效焦距f1与最靠近像侧的负透镜的有效焦距fn之间可满足-3.0＜f1/fn≤-0.5，更具体地，f1和fn进一步可满足-2.55≤f1/fn≤-0.53。通过合理的控制第一透镜的正焦距和最靠近像侧的负透镜的负焦距的比值，能够高效地平衡光学系统产生的大部分的初级球差，使得轴上视场及其附近视场具有良好的成像质量。
第二透镜于光轴上的中心厚度CT2与最靠近像侧的负透镜于光轴上的中心厚度CTn之间可满足0.5≤CT2/CTn≤1.0，更具体地，CT2和CTn进一步可满足0.56≤CT2/CTn≤1.00。通过控制第二透镜的中心厚度CT2和最靠近像侧的负透镜的中心厚度CTn的比值，来获得对慧差的控制能力，使得光学系统获得良好的成像质量。
第一透镜的色散系数V1与最靠近像侧的正透镜的色散系数Vp之间可满足1≤V1/Vp＜3，更具体地，V1和Vp进一步可满足1.00≤V1/Vp≤2.74。通过对第一透镜和最靠近像侧的正透镜的材料的合理选择，使得第一透镜的色散系数V1与最靠近像侧的正透镜的色散系数Vp的比值在合理范围内，进而使得光学系统获得良好的平衡色差的能力。
第一透镜于光轴上的中心厚度CT1与最靠近像侧的正透镜于光轴上的中心厚度CTp之间可满足1＜CT1/CTp＜2，更具体地，CT1和CTp进一步可满足1.12≤CT1/CTp≤1.84。通过对第一透镜的中心厚度和最靠近像侧的正透镜的中心厚度的比值约束，能够调节两者的畸变贡献率，以将系统最终的畸变量控制在合理的区间内，从而满足成像的要求。
摄像镜头的入瞳直径EPD与摄像镜头的最大半像高ImgH之间可满足0.6≤EPD/ImgH≤0.8，更具体地，EPD和ImgH进一步可满足0.63≤EPD/ImgH≤0.78。满足条件式0.6≤EPD/ImgH≤0.8，有利于实现大像面、大孔径等有益效果。
摄像镜头的总有效焦距f与摄像镜头的入瞳直径EPD之间可满足1.5≤f/EPD≤2.8，更具体地，f和EPD进一步可满足1.70≤f/EPD≤ 2.67。满足条件式1.5≤f/EPD≤2.8，能够保证系统的f数落在可行常用的区间内，从而保证光学系统在较暗拍摄条件下可以得到适宜的信噪比。
从第一透镜物侧面的中心至摄像镜头成像面的轴上距离TTL可满足3.0mm＜TTL＜7.5mm，更具体地，TTL进一步可满足3.45mm≤TTL≤5.30mm。满足条件式3.0mm＜TTL＜7.5mm，能够保证光学系统的紧凑性，使得摄像镜头满足从广角到长焦的手机镜头的一般总长要求。
从第一透镜物侧面的中心至摄像镜头成像面的轴上距离TTL与摄像镜头的最大半像高ImgH之间可满足TTL/ImgH≤1.75，更具体地，TTL和ImgH进一步可满足1.40≤TTL/ImgH≤1.71。满足条件式TTL/ImgH≤1.75，能够确保系统的紧凑性，实现光学成像镜头的超薄特性与小型化，从而使得该摄像镜头能够较好地适用于例如便携式电子产品等尺寸受限的系统。
在示例性实施方式中，摄像镜头还可设置有至少一个光阑，以进一步提升镜头的成像质量。光阑可根据需要设置于物侧与像侧之间的任意位置处。
可选地，上述摄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Petzval的设计理论，实现场曲的最小化通常需要使用多个光学元件(如，具有光焦度的透镜)，多个光学元件具有不同方向的场曲贡献量，不同方向的场曲进行叠加平衡从而实现场曲的最小化。但是，使用更多的光学元件意味着设计成本、加工成本和组立成本等的增加。在当前的设计中，配合弯曲的感光元件，可以将成像面设计成与感光元件的弯曲相一致的弯曲面，这样的设计能够有效地提升像质。同时，将成像面设计成弯曲面还相当于增加了镜头设计的自由度，从而能够有效地对例如视场角、孔径、相对照度等设计指标做出进一步改善。
根据本申请的上述实施方式的摄像镜头采用弯曲的成像面，能有效改善像差，同时具有优良的成像性能。在本申请的实施方式中，各透镜的镜面中的至少一个为非球面镜面。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，从而可进一步改善成像质量。
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，可改变构成摄像镜头的透镜数量，来获得本说明书中描述的各个结果和优点。例如，虽然在各实施例中以四至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四至七个透镜。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摄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的摄像镜头。图1示出了根据本申请实施例1的摄像镜头的结构示意图。
如图1所示，摄像镜头沿着光轴从物侧至成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和成像面S11。其中，成像面S11为在近轴处凸向像侧的弯曲面。
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，且第一透镜E1的物侧面S1和像侧面S2均为非球面。
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，且第二透镜E2的物侧面S3和像侧面S4均为非球面。
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，且第三透镜E3的物侧面S5和像侧面S6均为非球面。
第四透镜E4具有负光焦度，其物侧面S7为凸面，像侧面S8为凹面，且第四透镜E4的物侧面S7和像侧面S8均为非球面。
可选地，摄像镜头还可包括具有物侧面S9和像侧面S10的滤光片E5。来自物体的光依序穿过各表面S1至S10并最终成像在成像面S11上。
可选地，可在物侧与第一透镜E1之间设置用于限制光束的光阑 STO，以提升摄像镜头的成像质量。
在本实施例中，第四透镜E4为最靠近像侧的负透镜，第三透镜E3为最靠近像侧的正透镜。
表1示出了实施例1的摄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 PCTCN2018085626-appb-000001
表1
第一透镜E1的色散系数V1与最靠近像侧的正透镜的色散系数Vp之间满足V1/Vp＝1.00；第一透镜E1于光轴上的中心厚度CT1与最靠近像侧的正透镜于光轴上的中心厚度CTp之间满足CT1/CTp＝1.37；第二透镜E2于光轴上的中心厚度CT2与最靠近像侧的负透镜于光轴上的中心厚度CTn之间满足CT2/CTn＝0.60。
在本实施例中，各透镜均可采用非球面透镜，各非球面面型x由以下公式限定：
Figure PCTCN2018085626-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-S8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 -2.0491E-01 2.4453E+00 -2.5853E+01 1.5996E+02 -6.2323E+02 1.5285E+03 -2.2931E+03 1.9207E+03 -6.8977E+02
S2 1.9359E-03 -1.3597E+00 2.0422E+01 -1.8490E+02 1.0098E+03 -3.4171E+03 6.9860E+03 -7.9100E+03 3.8058E+03
S3 -4.2629E-01 2.8164E+00 -4.4648E+01 3.7011E+02 -1.8870E+03 5.8946E+03 -1.0862E+04 1.0618E+04 -4.0888E+03
S4 -2.9015E-01 1.0328E+00 -8.2574E+00 3.9728E+01 -1.3769E+02 3.3493E+02 -5.2491E+02 4.6470E+02 -1.7409E+02
S5 -3.4369E-01 1.2764E+00 -3.1943E+00 1.6603E+00 2.3807E+01 -8.5133E+01 1.3594E+02 -1.1209E+02 3.8597E+01
S6 -6.0313E-01 1.6747E+00 -5.8772E+00 2.0478E+01 -5.2559E+01 9.0899E+01 -9.4501E+01 5.2161E+01 -1.1694E+01
S7 -8.5236E-01 9.8531E-01 -8.3368E-01 5.9184E-01 -3.1146E-01 1.1035E-01 -2.4584E-02 3.0968E-03 -1.6761E-04
S8 -4.7087E-01 5.6880E-01 -5.0103E-01 3.0421E-01 -1.2153E-01 3.0137E-02 -4.1937E-03 2.6005E-04 -2.3079E-06
表2
表3给出实施例1中各透镜的有效焦距f1至f4、摄像镜头的总有效焦距f、摄像镜头的光学总长度TTL(即，从第一透镜E1的物侧面S1的中心至成像面S11在光轴上的距离)以及摄像镜头的最大半视场角HFOV。
参数 f1(mm) f2(mm) f3(mm) f4(mm) f(mm) TTL(mm) HFOV(°)
数值 3.15 -8.92 3.89 -5.42 2.72 3.45 41.2
表3
摄像镜头的光学总长度TTL＝3.45mm；摄像镜头的总有效焦距f与第一透镜E1的物侧面S1的曲率半径R1之间满足f/R1＝2.32；摄像镜头的总有效焦距f与摄像镜头的成像面S11的曲率半径RI之间满足|f/RI|＝0.04；第一透镜E1的有效焦距f1与最靠近像侧的负透镜的有效焦距fn之间满足f1/fn＝-0.58。
摄像镜头的入瞳直径EPD与摄像镜头的最大半像高ImgH之间满足EPD/ImgH＝0.63；摄像镜头的总有效焦距f与摄像镜头的入瞳直径EPD之间满足f/EPD＝1.79；摄像镜头的光学总长度TTL与摄像镜头的最大半像高ImgH之间满足TTL/ImgH＝1.44。
图2A示出了实施例1的摄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的摄像镜头的象散曲线，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的摄像镜头的畸变曲线，其表示不同视角情况下的畸变大小值。图2D示出了实施例1的摄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所给出的摄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的摄像镜头。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的摄像镜头的结构示意图。
如图3所示，摄像镜头沿着光轴从物侧至成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和成像面S11。其中，成像面S11为在近轴处凸向像侧的弯曲面。
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，且第一透镜E1的物侧面S1和像侧面S2均为非球面。
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，且第二透镜E2的物侧面S3和像侧面S4均为非球面。
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，且第三透镜E3的物侧面S5和像侧面S6均为非球面。
第四透镜E4具有负光焦度，其物侧面S7为凸面，像侧面S8为凹面，且第四透镜E4的物侧面S7和像侧面S8均为非球面。
可选地，摄像镜头还可包括具有物侧面S9和像侧面S10的滤光片E5。来自物体的光依序穿过各表面S1至S10并最终成像在成像面S11上。
可选地，可在物侧与第一透镜E1之间设置用于限制光束的光阑STO，以提升摄像镜头的成像质量。
在本实施例中，第四透镜E4为最靠近像侧的负透镜，第三透镜E3为最靠近像侧的正透镜。
表4示出了实施例2的摄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示出了实施例2中各透镜的有效焦距f1至f4、摄像镜头的总有效焦距f、摄像镜头的光学总长度TTL以及摄像镜头的最大半视场角HFOV。
Figure PCTCN2018085626-appb-000003
表4
面号 A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 -2.0401E-01 2.4438E+00 -2.5724E+01 1.5854E+02 -6.1554E+02 1.5051E+03 -2.2524E+03 1.8825E+03 -6.7478E+02
S2 4.3049E-03 -1.5059E+00 2.3124E+01 -2.0890E+02 1.1310E+03 -3.7726E+03 7.5744E+03 -8.3982E+03 3.9487E+03
S3 -4.1276E-01 2.5446E+00 -4.0011E+01 3.2073E+02 -1.5531E+03 4.4996E+03 -7.3820E+03 5.8793E+03 -1.3843E+03
S4 -2.7704E-01 7.7473E-01 -5.6797E+00 2.3376E+01 -7.1386E+01 1.6359E+02 -2.5190E+02 2.2080E+02 -8.1028E+01
S5 -3.3982E-01 1.3402E+00 -4.1895E+00 7.7690E+00 8.9480E-01 -3.1778E+01 6.2057E+01 -5.6424E+01 2.0990E+01
S6 -6.0364E-01 1.7394E+00 -6.4392E+00 2.2938E+01 -5.8905E+01 1.0053E+02 -1.0289E+02 5.6032E+01 -1.2429E+01
S7 -8.3299E-01 9.5213E-01 -7.9800E-01 5.6145E-01 -2.9263E-01 1.0262E-01 -2.2618E-02 2.8177E-03 -1.5078E-04
S8 -4.6494E-01 5.5834E-01 -4.8945E-01 2.9654E-01 -1.1873E-01 2.9739E-02 -4.2531E-03 2.8622E-04 -4.6651E-06
表5
参数 f1(mm) f2(mm) f3(mm) f4(mm) f(mm) TTL(mm) HFOV(°)
数值 3.15 -8.77 3.90 -5.53 2.72 3.45 41.3
表6
图4A示出了实施例2的摄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的摄像镜头的象散曲线，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的摄像镜头的畸变曲线，其表示不同视角情况下的畸变 大小值。图4D示出了实施例2的摄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所给出的摄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的摄像镜头。图5示出了根据本申请实施例3的摄像镜头的结构示意图。
如图5所示，摄像镜头沿着光轴从物侧至成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和成像面S11。其中，成像面S11为在近轴处凸向像侧的弯曲面。
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，且第一透镜E1的物侧面S1和像侧面S2均为非球面。
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，且第二透镜E2的物侧面S3和像侧面S4均为非球面。
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，且第三透镜E3的物侧面S5和像侧面S6均为非球面。
第四透镜E4具有负光焦度，其物侧面S7为凸面，像侧面S8为凹面，且第四透镜E4的物侧面S7和像侧面S8均为非球面。
可选地，摄像镜头还可包括具有物侧面S9和像侧面S10的滤光片E5。来自物体的光依序穿过各表面S1至S10并最终成像在成像面S11上。
可选地，可在物侧与第一透镜E1之间设置用于限制光束的光阑STO，以提升摄像镜头的成像质量。
在本实施例中，第四透镜E4为最靠近像侧的负透镜，第三透镜E3为最靠近像侧的正透镜。
表7示出了实施例3的摄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示出了实施例3中各透镜的有效焦距f1至f4、摄像镜头的总有效焦距f、摄像 镜头的光学总长度TTL以及摄像镜头的最大半视场角HFOV。
Figure PCTCN2018085626-appb-000004
表7
面号 A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 -2.0799E-01 2.5151E+00 -2.6126E+01 1.5880E+02 -6.0733E+02 1.4630E+03 -2.1579E+03 1.7791E+03 -6.2956E+02
S2 -1.2438E-02 -3.8291E-01 3.7870E+00 -2.6344E+01 1.1138E+02 -3.0523E+02 5.2385E+02 -5.1808E+02 2.2498E+02
S3 -4.1376E-01 2.7829E+00 -4.3964E+01 3.5932E+02 -1.7929E+03 5.4330E+03 -9.5843E+03 8.7582E+03 -2.9843E+03
S4 -2.4784E-01 5.8699E-01 -2.6935E+00 6.0090E-01 3.2454E+01 -1.2703E+02 2.3616E+02 -2.3007E+02 9.5181E+01
S5 -2.6484E-01 8.1007E-01 3.6540E-01 -1.7767E+01 9.3578E+01 -2.4461E+02 3.5758E+02 -2.8224E+02 9.3712E+01
S6 -6.3395E-01 1.8896E+00 -7.3391E+00 2.7014E+01 -7.0559E+01 1.2122E+02 -1.2461E+02 6.8249E+01 -1.5253E+01
S7 -8.3833E-01 9.6366E-01 -8.4794E-01 6.3885E-01 -3.5308E-01 1.2984E-01 -2.9836E-02 3.8674E-03 -2.1527E-04
S8 -4.2548E-01 4.7815E-01 -3.9060E-01 2.1454E-01 -7.3373E-02 1.3381E-02 -5.8211E-04 -1.7672E-04 2.0295E-05
表8
参数 f1(mm) f2(mm) f3(mm) f4(mm) f(mm) TTL(mm) HFOV(°)
数值 3.19 -9.38 4.15 -6.01 2.73 3.45 41.2
表9
图6A示出了实施例3的摄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的摄像镜头的象散曲线，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的摄像镜头的畸变曲线，其表示不同视角情况下的畸变大小值。图6D示出了实施例3的摄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所给出的摄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的摄像镜头。图7示出了根据本申请实施例4的摄像镜头的结构示意图。
如图7所示，摄像镜头沿着光轴从物侧至成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、第五透镜E5和成像面S13。其中，成像面S13为在近轴处凸向物侧的弯曲面。
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，且第一透镜E1的物侧面S1和像侧面S2均为非球面。
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，且第二透镜E2的物侧面S3和像侧面S4均为非球面。
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，且第三透镜E3的物侧面S5和像侧面S6均为非球面。
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，且第四透镜E4的物侧面S7和像侧面S8均为非球面。
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，且第五透镜E5的物侧面S9和像侧面S10均为非球面。
可选地，摄像镜头还可包括具有物侧面S11和像侧面S12的滤光片E6。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。
可选地，可在物侧与第一透镜E1之间设置用于限制光束的光阑STO，以提升摄像镜头的成像质量。
在本实施例中，第五透镜E5为最靠近像侧的负透镜，第四透镜E4为最靠近像侧的正透镜。
表10示出了实施例4的摄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示出了实施例4中各透镜的有效焦距f1至f5、摄像镜头的总有效焦距f、摄 像镜头的光学总长度TTL以及摄像镜头的最大半视场角HFOV。
Figure PCTCN2018085626-appb-000005
表10
面号 A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 -1.5443E-03 1.3568E-01 -6.6622E-01 2.0385E+00 -3.9189E+00 4.7932E+00 -3.6121E+00 1.5322E+00 -2.8070E-01
S2 1.3887E-01 -4.0125E-01 1.4187E+00 -4.3825E+00 9.7998E+00 -1.4395E+01 1.3049E+01 -6.6181E+00 1.4342E+00
S3 1.0709E-01 -3.6251E-01 7.4871E-01 -8.3816E-01 2.1300E-01 9.9784E-01 -1.9762E+00 1.6269E+00 -5.1930E-01
S4 -1.0296E-02 -2.4768E-01 1.3181E+00 -5.8273E+00 2.2035E+01 -5.3967E+01 7.9280E+01 -6.4086E+01 2.1942E+01
S5 -5.5188E-02 -1.7168E-02 4.5043E-01 -1.4416E+00 4.5200E+00 -7.9730E+00 6.8060E+00 -2.0444E+00 -2.0240E-01
S6 1.0298E-02 -3.0702E-01 2.3762E+00 -9.5315E+00 2.4987E+01 -4.1131E+01 4.0797E+01 -2.2330E+01 5.1988E+00
S7 4.1838E-03 1.3901E-02 -1.1265E-01 3.6148E-01 -5.1416E-01 4.3760E-01 -2.3702E-01 7.3439E-02 -9.6025E-03
S8 -3.9837E-03 3.5370E-02 -8.3153E-02 1.3928E-01 -1.2319E-01 7.8192E-02 -3.8670E-02 1.1506E-02 -1.3954E-03
S9 -1.3228E-01 1.1678E-01 -1.1912E-01 9.7756E-02 -5.6847E-02 2.1960E-02 -5.1636E-03 6.6032E-04 -3.5143E-05
S10 -1.3815E-01 1.0055E-01 -6.6963E-02 2.9015E-02 -8.1698E-03 1.5052E-03 -1.8356E-04 1.4835E-05 -6.4184E-07
表11
Figure PCTCN2018085626-appb-000006
表12
图8A示出了实施例4的摄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的摄像镜头的象散曲线，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的摄像镜头的畸变曲线，其表示不同视角情况下的畸变大小值。图8D示出了实施例4的摄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所给出的摄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的摄像镜头。图9示出了根据本申请实施例5的摄像镜头的结构示意图。
如图9所示，摄像镜头沿着光轴从物侧至成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、第五透镜E5、第六透镜E6和成像面S15。其中，成像面S15为在近轴处凸向像侧的弯曲面。
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，且第一透镜E1的物侧面S1和像侧面S2均为非球面。
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，且第二透镜E2的物侧面S3和像侧面S4均为非球面。
第三透镜E3具有正光焦度，其物侧面S5为凸面，像侧面S6为凹面，且第三透镜E3的物侧面S5和像侧面S6均为非球面。
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，且第四透镜E4的物侧面S7和像侧面S8均为非球面。
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，且第五透镜E5的物侧面S9和像侧面S10均为非球面。
第六透镜E6具有负光焦度，其物侧面S11为凹面，像侧面S12为凹面，且第六透镜E6的物侧面S11和像侧面S12均为非球面。
可选地，摄像镜头还可包括具有物侧面S13和像侧面S14的滤光片E7。来自物体的光依序穿过各表面S1至S14并最终成像在成像面S15上。
可选地，可在第一透镜E1与第二透镜E2之间设置用于限制光束的光阑STO，以提升摄像镜头的成像质量。
在本实施例中，第六透镜E6为最靠近像侧的负透镜，第五透镜 E5为最靠近像侧的正透镜。
表13示出了实施例5的摄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示出了实施例5中各透镜的有效焦距f1至f6、摄像镜头的总有效焦距f、摄像镜头的光学总长度TTL以及摄像镜头的最大半视场角HFOV。
Figure PCTCN2018085626-appb-000007
表13
面号 A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 2.5438E-04 -5.0882E-03 3.2934E-02 -1.1438E-01 2.2060E-01 -2.6421E-01 1.8810E-01 -7.4067E-02 1.2150E-02
S2 -6.1747E-02 1.3976E-01 -1.4468E-01 -6.3510E-02 3.9667E-01 -5.6734E-01 4.1986E-01 -1.6343E-01 2.6525E-02
S3 -1.4932E-01 3.1146E-01 -4.7608E-02 -1.2257E+00 3.7017E+00 -5.7670E+00 5.2712E+00 -2.6587E+00 5.7577E-01
S4 -9.2734E-02 1.7439E-01 6.9707E-01 -5.0302E+00 1.6916E+01 -3.4161E+01 4.1866E+01 -2.8650E+01 8.4449E+00
S5 -6.7128E-02 -1.5636E-01 1.4631E+00 -8.4067E+00 2.7987E+01 -5.7425E+01 7.1003E+01 -4.8600E+01 1.4165E+01
S6 -1.2128E-01 -1.9270E-02 2.8799E-01 -1.6372E+00 4.1579E+00 -6.6343E+00 6.5138E+00 -3.5124E+00 7.9728E-01
S7 -2.0856E-01 1.9995E-01 -6.4585E-01 1.7352E+00 -3.0569E+00 2.8842E+00 -1.1429E+00 -7.5519E-03 8.3034E-02
S8 -1.9090E-01 1.5493E-01 -3.1236E-01 6.4139E-01 -8.5804E-01 7.0670E-01 -3.3768E-01 8.5265E-02 -8.7869E-03
S9 -8.9117E-02 4.3839E-02 -2.3339E-01 4.6400E-01 -5.1709E-01 3.5387E-01 -1.5091E-01 3.6906E-02 -3.8923E-03
S10 -8.6223E-02 1.4151E-01 -3.0037E-01 3.5985E-01 -2.4353E-01 9.8935E-02 -2.4067E-02 3.2357E-03 -1.8497E-04
S11 -9.1542E-02 -6.1740E-02 1.0165E-01 -4.8259E-02 1.1941E-02 -1.6850E-03 1.3033E-04 -4.4903E-06 1.9733E-08
S12 -1.0687E-01 5.6157E-02 -2.2433E-02 5.7691E-03 -8.8541E-04 5.6429E-05 2.8216E-06 -5.2070E-07 1.4461E-08
表14
Figure PCTCN2018085626-appb-000008
表15
图10A示出了实施例5的摄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的摄像镜头的象散曲线，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的摄像镜头的畸变曲线，其表示不同视角情况下的畸变大小值。图10D示出了实施例5的摄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所给出的摄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的摄像镜头。图11示出了根据本申请实施例6的摄像镜头的结构示意图。
如图11所示，摄像镜头沿着光轴从物侧至成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、第五透镜E5、第六透镜E6、第七透镜E7和成像面S15。其中，成像面S15为在近轴处凸向像侧的弯曲面。
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，且第一透镜E1的物侧面S1和像侧面S2均为非球面。
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，且第二透镜E2的物侧面S3和像侧面S4均为非球面。
第三透镜E3具有正光焦度，其物侧面S5为凸面，像侧面S6为凹面，且第三透镜E3的物侧面S5和像侧面S6均为非球面。
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，且第四透镜E4的物侧面S7和像侧面S8均为非球面。
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，且第五透镜E5的物侧面S9和像侧面S10均为非球面。
第六透镜E6具有正光焦度，其物侧面S11为凹面，像侧面S12为凸面，且第六透镜E6的物侧面S11和像侧面S12均为非球面。
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，且第七透镜E7的物侧面S13和像侧面S14均为非球面。
来自物体的光依序穿过各表面S1至S14并最终成像在成像面S15上。
可选地，可在第三透镜E3与第四透镜E4之间设置用于限制光束的光阑STO，以提升摄像镜头的成像质量。
在本实施例中，第七透镜E7为最靠近像侧的负透镜，第六透镜E6为最靠近像侧的正透镜。
表16示出了实施例6的摄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示出了实施例6中各透镜的有效焦距f1至f7、摄像镜头的总有效焦距f、摄像镜头的光学总长度TTL以及摄像镜头的最大半视场角HFOV。
Figure PCTCN2018085626-appb-000009
表16
面号 A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 -2.4761E-02 6.7604E-02 -1.9778E-01 2.9814E-01 -2.7212E-01 1.4657E-01 -4.5014E-02 7.1938E-03 -4.5357E-04
S2 -4.8909E-02 3.4327E-01 -1.2704E+00 2.5694E+00 -3.0450E+00 2.1691E+00 -9.1395E-01 2.0979E-01 -2.0202E-02
S3 -3.4014E-02 3.5189E-01 -1.5608E+00 3.5408E+00 -4.6128E+00 3.6214E+00 -1.6942E+00 4.3476E-01 -4.7067E-02
S4 -1.5054E-02 4.1234E-01 -2.7283E+00 8.4219E+00 -1.5084E+01 1.6582E+01 -1.0978E+01 4.0024E+00 -6.1704E-01
S5 3.8740E-02 3.4560E-02 -5.4067E-01 2.1344E+00 -4.5283E+00 5.8873E+00 -4.6061E+00 1.9964E+00 -3.7381E-01
S6 -1.2455E-01 5.1992E-01 -2.1715E+00 7.1706E+00 -1.5968E+01 2.2818E+01 -1.9909E+01 9.5852E+00 -1.9429E+00
S7 1.8421E-02 -2.6773E-01 2.5990E+00 -1.1821E+01 3.3123E+01 -5.8761E+01 6.3991E+01 -3.8934E+01 1.0067E+01
S8 -1.2326E-01 7.5280E-01 -4.7027E+00 2.1172E+01 -5.9726E+01 1.0491E+02 -1.1170E+02 6.6059E+01 -1.6681E+01
S9 -5.3598E-02 8.8851E-02 -4.6941E-01 1.8891E+00 -4.7181E+00 6.6041E+00 -5.1481E+00 2.0004E+00 -2.8019E-01
S10 1.3660E-02 -1.8534E-02 4.0463E-03 1.4595E-01 -3.8030E-01 3.5088E-01 -1.4450E-01 2.5309E-02 -1.3810E-03
S11 1.2092E-01 -7.3231E-01 2.8777E+00 -7.2424E+00 1.1191E+01 -1.0687E+01 6.1360E+00 -1.9272E+00 2.5290E-01
S12 1.3134E-01 -2.5651E-01 6.1751E-01 -1.0966E+00 1.1943E+00 -8.0072E-01 3.2476E-01 -7.2630E-02 6.8250E-03
S13 -5.5993E-02 8.0402E-02 -4.0809E-02 -2.3328E-03 1.0697E-02 -4.4160E-03 8.1367E-04 -7.0342E-05 2.2265E-06
S14 -9.3867E-02 9.0935E-02 -6.9225E-02 3.6165E-02 -1.3075E-02 3.1403E-03 -4.6390E-04 3.7358E-05 -1.2399E-06
表17
Figure PCTCN2018085626-appb-000010
表18
图12A示出了实施例6的摄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的摄像镜头的象散曲线，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的摄像镜头的畸变曲线，其表示不同视角情况下的畸变大小值。图12D示出了实施例6的摄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所给出的摄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的摄像镜头。图13示出了根据本申请实施例7的摄像镜头的结构示意图。
如图13所示，摄像镜头沿着光轴从物侧至成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、第五透镜E5、第六透镜E6、第七透镜E7和成像面S15。其中，成像面S15为在近轴处凸向像侧的弯曲面。
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，且第一透镜E1的物侧面S1为非球面，像侧面S2为球面。
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，且第二透镜E2的物侧面S3为球面，像侧面S4为非球面。
第三透镜E3具有正光焦度，其物侧面S5为凸面，像侧面S6为凹面，且第三透镜E3的物侧面S5和像侧面S6均为非球面。
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，且第四透镜E4的物侧面S7和像侧面S8均为非球面。
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，且第五透镜E5的物侧面S9和像侧面S10均为非球面。
第六透镜E6具有正光焦度，其物侧面S11为凹面，像侧面S12为凸面，且第六透镜E6的物侧面S11和像侧面S12均为非球面。
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，且第七透镜E7的物侧面S13和像侧面S14均为非球面。
来自物体的光依序穿过各表面S1至S14并最终成像在成像面S15上。
可选地，可在第三透镜E3与第四透镜E4之间设置用于限制光束的光阑STO，以提升摄像镜头的成像质量。
在本实施例中，第七透镜E7为最靠近像侧的负透镜，第六透镜E6为最靠近像侧的正透镜。
表19示出了实施例7的摄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示出了实施例7中各透镜的有效焦距f1至f7、摄像镜头的总有效焦距f、摄像镜头的光学总长度TTL以及摄像镜头的最大半视场角HFOV。
Figure PCTCN2018085626-appb-000011
Figure PCTCN2018085626-appb-000012
表19
面号 A4 A6 A8 A10 A12 A14
S1 -6.3418E-03 -5.6284E-03 4.1245E-04 -4.9125E-03 1.6688E-03 -9.7437E-05
S4 -2.9490E-03 1.4328E-02 -3.3927E-02 1.5282E-02 5.2324E-03 -6.2989E-03
S5 8.8598E-03 1.9574E-02 7.5414E-03 1.9384E-03 8.8337E-04 5.3131E-03
S6 -1.0295E-01 8.3967E-02 6.3722E-02 -2.4983E-01 2.7267E-01 -9.7705E-02
S7 6.8622E-02 -8.0925E-02 2.4971E-01 -3.5454E-01 2.9038E-01 -1.1816E-01
S8 -1.0859E-02 1.7080E-03 5.1104E-02 1.8242E-03 -9.9750E-03 -8.5217E-03
S9 -1.7438E-02 -1.3524E-02 -2.3828E-02 8.9878E-04 -9.1488E-03 -5.3090E-04
S10 6.6576E-03 -1.7142E-02 2.5956E-03 -5.6638E-03 -5.0675E-03 2.0086E-03
S11 -1.7740E-02 -6.4845E-02 -3.8382E-02 4.3057E-02 -1.5270E-02 7.5809E-03
S12 5.9711E-02 -6.4016E-02 5.2878E-03 5.9276E-03 2.6254E-03 -1.1689E-03
S13 -3.2252E-02 8.7155E-03 -1.9903E-04 -9.3195E-05 2.1947E-06 4.0619E-07
S14 -4.8739E-02 1.1685E-02 -1.3801E-03 -3.2460E-05 2.9013E-05 -2.2785E-06
表20
Figure PCTCN2018085626-appb-000013
表21
图14A示出了实施例7的摄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的摄像镜头的象散曲线，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的摄像镜头的畸变曲线，其表示不同视角情况下的畸变大小值。图14D示出了实施例7的摄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所给出的摄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的摄像镜头。图15示出了根据本申请实施例8的摄像镜头的结构示意图。
如图15所示，摄像镜头沿着光轴从物侧至成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、第五透镜E5、第六透镜E6、第七透镜E7和成像面S15。其中，成像面S15为在近轴处凸向像侧的弯曲面。
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，且第一透镜E1的物侧面S1和像侧面S2均为非球面。
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，且第二透镜E2的物侧面S3和像侧面S4均为非球面。
第三透镜E3具有正光焦度，其物侧面S5为凸面，像侧面S6为凹面，且第三透镜E3的物侧面S5和像侧面S6均为非球面。
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，且第四透镜E4的物侧面S7和像侧面S8均为非球面。
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，且第五透镜E5的物侧面S9和像侧面S10均为非球面。
第六透镜E6具有正光焦度，其物侧面S11为凹面，像侧面S12为凸面，且第六透镜E6的物侧面S11和像侧面S12均为非球面。
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，且第七透镜E7的物侧面S13和像侧面S14均为非球面。
来自物体的光依序穿过各表面S1至S14并最终成像在成像面S15上。
可选地，可在第三透镜E3与第四透镜E4之间设置用于限制光束的光阑STO，以提升摄像镜头的成像质量。
在本实施例中，第七透镜E7为最靠近像侧的负透镜，第六透镜E6为最靠近像侧的正透镜。
表22示出了实施例8的摄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23示出了可用于实施例8中各非球面镜面的高次项系数，其中，各非球面面型可由上述实施例1中给出的公式(1)限定。表24示出了实施例8中各透镜的有效焦距f1至f7、摄像镜头的总有效焦距f、摄像镜头的光学总长度TTL以及摄像镜头的最大半视场角HFOV。
Figure PCTCN2018085626-appb-000014
表22
面号 A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 -1.7620E-02 2.7191E-02 -9.9288E-02 1.6264E-01 -1.6476E-01 9.8961E-02 -3.4571E-02 6.5346E-03 -5.1777E-04
S2 -1.3261E-02 6.8977E-02 -2.4865E-01 5.1443E-01 -6.3678E-01 4.7537E-01 -2.0995E-01 5.0433E-02 -5.0647E-03
S3 1.9877E-03 1.1964E-02 -1.2469E-01 3.2933E-01 -4.4100E-01 3.5009E-01 -1.6576E-01 4.3105E-02 -4.7301E-03
S4 3.3235E-02 -2.3664E-01 6.8995E-01 -1.1883E+00 9.7290E-01 1.0530E-01 -8.2863E-01 5.7377E-01 -1.2976E-01
S5 6.2458E-02 -3.9231E-01 1.7796E+00 -4.5885E+00 7.2641E+00 -7.0353E+00 4.0442E+00 -1.2555E+00 1.5812E-01
S6 -1.4310E-01 5.7902E-01 -2.5793E+00 8.5694E+00 -1.8476E+01 2.5189E+01 -2.0916E+01 9.5757E+00 -1.8348E+00
S7 7.0629E-02 -5.6582E-01 3.5191E+00 -1.2742E+01 2.8952E+01 -4.1286E+01 3.5535E+01 -1.6752E+01 3.2627E+00
S8 -4.7559E-02 8.5584E-02 -2.6545E-01 1.2293E+00 -3.0719E+00 4.3413E+00 -3.5117E+00 1.4830E+00 -2.5350E-01
S9 -6.4389E-03 -1.6981E-01 5.8745E-01 -1.5775E+00 2.7165E+00 -3.1385E+00 2.3259E+00 -1.0191E+00 2.0011E-01
S10 3.5100E-02 -9.3674E-02 1.3566E-01 -1.4809E-01 7.3876E-02 9.0170E-03 -3.6586E-02 1.8576E-02 -2.7809E-03
S11 7.4503E-02 -2.6636E-01 6.4741E-01 -1.3070E+00 1.7364E+00 -1.4817E+00 8.1856E-01 -2.6709E-01 3.8620E-02
S12 1.2464E-01 -1.4700E-01 1.8122E-01 -2.2332E-01 1.8124E-01 -8.2442E-02 2.0567E-02 -2.5952E-03 1.1958E-04
S13 -5.8137E-02 1.0569E-01 -1.0091E-01 5.5989E-02 -1.8309E-02 3.5730E-03 -4.0097E-04 2.2679E-05 -4.2692E-07
S14 -7.5646E-02 6.1669E-02 -4.1405E-02 1.7457E-02 -4.5437E-03 6.7991E-04 -4.5035E-05 -8.4271E-07 2.0364E-07
表23
Figure PCTCN2018085626-appb-000015
表24
图16A示出了实施例8的摄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的摄像镜头的象散曲线，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的摄像镜头的畸变曲线，其表示不同视角情况下的畸变大小值。图16D示出了实施例8的摄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所给出的摄像镜头能够实现良好的成像品质。
实施例9
以下参照图17至图18D描述了根据本申请实施例9的摄像镜头。图17示出了根据本申请实施例9的摄像镜头的结构示意图。
如图17所示，摄像镜头沿着光轴从物侧至成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、第五透镜E5、第六透镜E6、第七透镜E7和成像面S15。其中，成像面S15为在近轴处凸向像侧的弯曲面。
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，且第一透镜E1的物侧面S1和像侧面S2均为非球面。
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，且第二透镜E2的物侧面S3和像侧面S4均为非球面。
第三透镜E3具有正光焦度，其物侧面S5为凸面，像侧面S6为凹面，且第三透镜E3的物侧面S5和像侧面S6均为非球面。
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，且第四透镜E4的物侧面S7和像侧面S8均为非球面。
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，且第五透镜E5的物侧面S9和像侧面S10均为非球面。
第六透镜E6具有正光焦度，其物侧面S11为凹面，像侧面S12 为凸面，且第六透镜E6的物侧面S11和像侧面S12均为非球面。
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，且第七透镜E7的物侧面S13和像侧面S14均为非球面。
来自物体的光依序穿过各表面S1至S14并最终成像在成像面S15上。
可选地，可在第三透镜E3与第四透镜E4之间设置用于限制光束的光阑STO，以提升摄像镜头的成像质量。
在本实施例中，第七透镜E7为最靠近像侧的负透镜，第六透镜E6为最靠近像侧的正透镜。
表25示出了实施例9的摄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26示出了可用于实施例9中各非球面镜面的高次项系数，其中，各非球面面型可由上述实施例1中给出的公式(1)限定。表27示出了实施例9中各透镜的有效焦距f1至f7、摄像镜头的总有效焦距f、摄像镜头的光学总长度TTL以及摄像镜头的最大半视场角HFOV。
Figure PCTCN2018085626-appb-000016
表25
面号 A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 -9.4753E-03 -8.1446E-03 7.8437E-04 -4.6760E-03 1.7082E-03 -1.1094E-04 0 0 0
S2 -4.3517E-03 -4.9353E-04 -4.8205E-04 -5.9158E-05 -2.7371E-05 -4.0943E-05 -4.0882E-05 -1.4031E-05 1.6286E-05
S3 -1.5228E-03 1.3947E-03 1.0852E-03 4.7664E-04 2.1245E-04 1.0641E-04 3.9979E-05 -9.0008E-06 -4.1680E-05
S4 -4.7173E-03 1.5140E-02 -3.4241E-02 1.4478E-02 5.7445E-03 -3.5432E-03 2.8462E-04 1.6200E-11 1.5894E-12
S5 1.4701E-02 1.3909E-02 2.7558E-03 9.5856E-04 -1.2997E-03 8.0560E-04 -5.9269E-04 -4.7930E-12 -1.3370E-12
S6 -9.2324E-02 9.4445E-02 5.6915E-02 -2.6374E-01 2.6846E-01 -9.7705E-02 -9.9425E-12 1.1256E-11 -2.0018E-12
S7 4.1203E-02 -9.5334E-02 2.5820E-01 -3.4394E-01 2.6993E-01 -1.1816E-01 8.7390E-13 7.8758E-12 -1.4279E-12
S8 -2.8721E-02 1.1958E-02 3.6471E-02 -1.2805E-02 -7.4046E-03 -8.5217E-03 -5.0774E-12 5.1856E-13 -5.2980E-14
S9 -9.8594E-03 -3.5243E-02 -2.0997E-02 1.1688E-02 -2.1159E-02 -5.3090E-04 6.5384E-12 -5.2464E-12 7.8567E-13
S10 2.3873E-02 -2.6355E-02 9.8982E-04 -7.5050E-03 -5.2197E-03 4.8011E-03 0 0 0
S11 3.5498E-02 -4.5602E-02 -3.0561E-02 4.8086E-02 -1.5816E-02 3.5447E-03 0 0 0
S12 9.5155E-02 -5.6880E-02 5.0455E-03 5.1527E-03 2.4634E-03 -1.1393E-03 0 0 0
S13 -2.1186E-02 8.9298E-03 -1.9576E-04 -1.0669E-04 1.9677E-07 3.2223E-07 0 0 0
S14 -4.5024E-02 9.4345E-03 -1.0350E-03 -1.0993E-04 2.2900E-05 -1.4192E-06 0 0 0
表26
Figure PCTCN2018085626-appb-000017
表27
图18A示出了实施例9的摄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18B示出了实施例9的摄像镜头的象散曲线，其表示子午像面弯曲和弧矢像面弯曲。图18C示出了实施例9的摄像镜头的畸变曲线，其表示不同视角情况下的畸变大小值。图18D示出了实施例9的摄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18A至图18D可知，实施例9所给出的摄像镜头能够实现良好的成像品质。
实施例10
以下参照图19至图20D描述了根据本申请实施例10的摄像镜头。图19示出了根据本申请实施例10的摄像镜头的结构示意图。
如图19所示，摄像镜头沿着光轴从物侧至成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、第五透镜E5、第六透镜E6、第七透镜E7和成像面S15。其中，成像面S15为在近轴处凸向像侧的弯曲面。
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，且第一透镜E1的物侧面S1和像侧面S2均为非球面。
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，且第二透镜E2的物侧面S3和像侧面S4均为非球面。
第三透镜E3具有正光焦度，其物侧面S5为凸面，像侧面S6为凹面，且第三透镜E3的物侧面S5和像侧面S6均为非球面。
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，且第四透镜E4的物侧面S7和像侧面S8均为非球面。
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，且第五透镜E5的物侧面S9和像侧面S10均为非球面。
第六透镜E6具有正光焦度，其物侧面S11为凹面，像侧面S12为凸面，且第六透镜E6的物侧面S11和像侧面S12均为非球面。
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，且第七透镜E7的物侧面S13和像侧面S14均为非球面。
来自物体的光依序穿过各表面S1至S14并最终成像在成像面S15上。
可选地，可在第三透镜E3与第四透镜E4之间设置用于限制光束的光阑STO，以提升摄像镜头的成像质量。
在本实施例中，第七透镜E7为最靠近像侧的负透镜，第六透镜E6为最靠近像侧的正透镜。
表28示出了实施例10的摄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29示出了可用于实施例10中各非球面镜面的高次项系数，其中，各非球面面型可由上述实施例1中给出的公式(1)限定。表30示出了实施例10中各透镜的有效焦距f1至f7、摄像镜头的总有效焦距f、摄像镜头的光学总长度TTL以及摄像镜头的最大半视场角HFOV。
Figure PCTCN2018085626-appb-000018
Figure PCTCN2018085626-appb-000019
表28
面号 A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 -9.4343E-03 -8.3426E-03 7.9909E-04 -4.6470E-03 1.7300E-03 -9.9183E-05 0 0 0
S2 -3.4308E-03 -8.6372E-05 -3.0731E-04 -4.3545E-06 1.4284E-06 -2.4917E-05 -3.1530E-05 -9.6032E-06 1.8009E-05
S3 -2.1187E-03 7.0835E-04 7.7288E-04 4.2184E-04 2.2715E-04 1.2196E-04 4.8125E-05 -3.1134E-06 -3.5800E-05
S4 -7.4202E-03 1.4945E-02 -3.3317E-02 1.4990E-02 5.8679E-03 -3.3193E-03 7.4391E-04 -5.3378E-09 8.3653E-10
S5 1.4058E-02 1.7971E-02 3.9204E-03 2.0450E-03 -4.1654E-04 8.5506E-04 -4.9389E-09 -1.8118E-09 1.6120E-09
S6 -9.3315E-02 8.9463E-02 5.7780E-02 -2.5936E-01 2.6509E-01 -9.7705E-02 -1.0544E-07 4.1208E-08 -2.9720E-09
S7 4.8002E-02 -9.5372E-02 2.5522E-01 -3.4746E-01 2.6280E-01 -1.1816E-01 2.1890E-08 8.1709E-09 -1.0764E-08
S8 -2.4574E-02 1.8342E-02 3.5592E-02 -1.5638E-02 -1.0391E-02 -8.5217E-03 -2.9796E-08 2.7091E-08 -8.5979E-09
S9 -1.5102E-02 -2.8843E-02 -1.9253E-02 1.2871E-02 -1.9140E-02 -5.3075E-04 -8.7903E-08 2.2028E-08 4.0324E-10
S10 1.1988E-02 -2.4404E-02 4.8175E-03 -6.0862E-03 -5.1195E-03 4.5977E-03 0 0 0
S11 1.7364E-02 -4.6444E-02 -3.3318E-02 4.7742E-02 -1.4978E-02 4.4948E-03 0 0 0
S12 8.3230E-02 -5.7597E-02 5.5168E-03 5.2438E-03 2.4811E-03 -1.1309E-03 0 0 0
S13 -2.2738E-02 8.7573E-03 -1.8348E-04 -1.0384E-04 4.0418E-07 2.6489E-07 0 0 0
S14 -4.7762E-02 9.7745E-03 -1.0579E-03 -1.1449E-04 2.2579E-05 -1.4244E-06 0 0 0
表29
Figure PCTCN2018085626-appb-000020
表30
图20A示出了实施例10的摄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20B示出了实施例10的摄像镜头的象散曲线，其表示子午像面弯曲和弧矢像面弯曲。图20C示出了实施例10的摄像镜头的畸变曲线，其表示不同视角情况下的畸变大小值。图20D示出了实施例10的摄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20A至图20D可知，实施例10所给出的摄像镜头能够实现良好的成像品质。
综上，实施例1至实施例10分别满足以下表31所示的关系。
条件式\实施例 1 2 3 4 5 6 7 8 9 10
EPD/ImgH 0.63 0.63 0.63 0.64 0.69 0.77 0.63 0.77 0.78 0.72
f/EPD 1.79 1.79 1.79 2.67 1.70 1.89 2.00 1.87 1.87 1.98
TTL(mm) 3.45 3.45 3.45 5.30 4.72 4.70 4.71 4.70 4.70 4.70
|f/RI| 0.04 0.04 0.04 0.11 0.04 0.30 0.22 0.24 0.23 0.22
f/R1 2.32 2.32 2.32 3.71 2.53 2.26 2.39 2.26 2.25 2.27
f1/fn -0.58 -0.57 -0.53 -0.55 -1.90 -2.03 -1.26 -2.26 -2.55 -2.10
V1/Vp 1.00 1.00 1.00 2.74 1.00 2.39 2.39 2.39 2.39 2.39
CT1/CTp 1.37 1.30 1.34 1.84 1.12 1.24 1.50 1.28 1.29 1.27
CT2/CTn 0.60 0.60 0.56 0.82 0.64 1.00 0.98 1.00 1.00 1.00
TTL/ImgH 1.44 1.44 1.44 1.64 1.40 1.71 1.48 1.69 1.70 1.65
表31
本申请还提供一种摄像装置，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)。摄像装置可以是诸如数码相机的独立摄像设备，也可以是集成在诸如手机等移动电子设备上的摄像模块。该摄像装置装配有以上描述的摄像镜头。
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 (28)

  1. 摄像镜头，沿光轴由物侧至像侧依序包括：具有正光焦度的第一透镜、具有负光焦度的第二透镜和至少一个后续透镜，
    其特征在于，
    所述摄像镜头最靠近像侧的透镜为具有负光焦度的负透镜，与所述负透镜相邻的透镜为具有正光焦度的正透镜，
    所述摄像镜头还包括弯曲的成像面，所述成像面的曲率半径RI与所述摄像镜头的总有效焦距f满足|f/RI|≤0.35。
  2. 根据权利要求1所述的摄像镜头，其特征在于，所述至少一个后续透镜沿光轴由所述第二透镜至像侧依序包括：第三透镜和第四透镜，
    所述第三透镜具有正光焦度；以及
    所述第四透镜具有负光焦度，其像侧面为凹面。
  3. 根据权利要求1所述的摄像镜头，其特征在于，所述至少一个后续透镜沿光轴由所述第二透镜至像侧依序包括：第三透镜、第四透镜和第五透镜，
    所述第三透镜具有正光焦度或负光焦度；
    所述第四透镜具有正光焦度；以及
    所述第五透镜具有负光焦度，其像侧面为凹面。
  4. 根据权利要求1所述的摄像镜头，其特征在于，所述至少一个后续透镜沿光轴由所述第二透镜至像侧依序包括：第三透镜、第四透镜、第五透镜和第六透镜，
    所述第三透镜和所述第四透镜均具有正光焦度或负光焦度；
    所述第五透镜具有正光焦度；以及
    所述第六透镜具有负光焦度，其像侧面为凹面。
  5. 根据权利要求1所述的摄像镜头，其特征在于，所述至少一个后续透镜沿光轴由所述第二透镜至像侧依序包括：第三透镜、第四透镜、第五透镜、第六透镜和第七透镜，
    所述第三透镜、所述第四透镜和所述第五透镜均具有正光焦度或负光焦度；
    所述第六透镜具有正光焦度；以及
    所述第七透镜具有负光焦度，其像侧面为凹面。
  6. 根据权利要求1至5中任一项所述的摄像镜头，其特征在于，所述第一透镜的物侧面为凸面，其物侧面的曲率半径R1与所述摄像镜头的总有效焦距f满足2＜f/R1＜5。
  7. 根据权利要求1至5中任一项所述的摄像镜头，其特征在于，所述第一透镜的有效焦距f1与所述负透镜的有效焦距fn满足-3.0＜f1/fn≤-0.5。
  8. 根据权利要求1至5中任一项所述的摄像镜头，其特征在于，所述第二透镜于所述光轴上的中心厚度CT2与所述负透镜于所述光轴上的中心厚度CTn满足0.5≤CT2/CTn≤1.0。
  9. 根据权利要求1至5中任一项所述的摄像镜头，其特征在于，所述第一透镜的色散系数V1与所述正透镜的色散系数Vp满足1≤V1/Vp＜3。
  10. 根据权利要求1至5中任一项所述的摄像镜头，其特征在于，所述第一透镜于所述光轴上的中心厚度CT1与所述正透镜于所述光轴上的中心厚度CTp满足1＜CT1/CTp＜2。
  11. 根据权利要求1至5中任一项所述的摄像镜头，其特征在于，所述摄像镜头的入瞳直径EPD与所述摄像镜头的最大半像高ImgH满 足0.6≤EPD/ImgH≤0.8。
  12. 根据权利要求1至5中任一项所述的摄像镜头，其特征在于，所述摄像镜头的总有效焦距f与所述摄像镜头的入瞳直径EPD满足1.5≤f/EPD≤2.8。
  13. 根据权利要求1至5中任一项所述的摄像镜头，其特征在于，所述第一透镜的物侧面至所述成像面的轴上距离TTL满足3.0mm＜TTL＜7.5mm。
  14. 根据权利要求13所述的摄像镜头，其特征在于，所述第一透镜的物侧面至所述成像面的轴上距离TTL与所述摄像镜头的最大半像高ImgH满足TTL/ImgH≤1.75。
  15. 摄像镜头，沿光轴由物侧至像侧依序包括：具有正光焦度的第一透镜、具有负光焦度的第二透镜和至少一个后续透镜，
    其特征在于，
    所述摄像镜头最靠近像侧的透镜为具有负光焦度的负透镜，与所述负透镜相邻的透镜为具有正光焦度的正透镜，
    所述摄像镜头还包括弯曲的成像面，所述第一透镜的物侧面至所述成像面的轴上距离TTL与所述摄像镜头的最大半像高ImgH满足TTL/ImgH≤1.75。
  16. 根据权利要求15所述的摄像镜头，其特征在于，所述至少一个后续透镜沿光轴由所述第二透镜至像侧依序包括：第三透镜和第四透镜，
    所述第三透镜具有正光焦度；以及
    所述第四透镜具有负光焦度，其像侧面为凹面。
  17. 根据权利要求15所述的摄像镜头，其特征在于，所述至少一 个后续透镜沿光轴由所述第二透镜至像侧依序包括：第三透镜、第四透镜和第五透镜，
    所述第三透镜具有正光焦度或负光焦度；
    所述第四透镜具有正光焦度；以及
    所述第五透镜具有负光焦度，其像侧面为凹面。
  18. 根据权利要求15所述的摄像镜头，其特征在于，所述至少一个后续透镜沿光轴由所述第二透镜至像侧依序包括：第三透镜、第四透镜、第五透镜和第六透镜，
    所述第三透镜和所述第四透镜均具有正光焦度或负光焦度；
    所述第五透镜具有正光焦度；以及
    所述第六透镜具有负光焦度，其像侧面为凹面。
  19. 根据权利要求15所述的摄像镜头，其特征在于，所述至少一个后续透镜沿光轴由所述第二透镜至像侧依序包括：第三透镜、第四透镜、第五透镜、第六透镜和第七透镜，
    所述第三透镜、所述第四透镜和所述第五透镜均具有正光焦度或负光焦度；
    所述第六透镜具有正光焦度；以及
    所述第七透镜具有负光焦度，其像侧面为凹面。
  20. 根据权利要求15至19中任一项所述的摄像镜头，其特征在于，所述第一透镜的物侧面为凸面，其物侧面的曲率半径R1与所述摄像镜头的总有效焦距f满足2＜f/R1＜5。
  21. 根据权利要求20所述的摄像镜头，其特征在于，所述摄像镜头的总有效焦距f与所述成像面的曲率半径RI满足|f/RI|≤0.35。
  22. 根据权利要求15至19中任一项所述的摄像镜头，所述第一透镜于所述光轴上的中心厚度CT1与所述正透镜于所述光轴上的中心 厚度CTp满足1＜CT1/CTp＜2。
  23. 根据权利要求22所述的摄像镜头，所述第二透镜于所述光轴上的中心厚度CT2与所述负透镜于所述光轴上的中心厚度CTn满足0.5≤CT2/CTn≤1.0。
  24. 根据权利要求23所述的摄像镜头，其特征在于，所述第一透镜的物侧面至所述成像面的轴上距离TTL满足3.0mm＜TTL＜7.5mm。
  25. 根据权利要求15至19中任一项所述的摄像镜头，其特征在于，所述第一透镜的色散系数V1与所述正透镜的色散系数Vp满足1≤V1/Vp＜3。
  26. 根据权利要求15至19中任一项所述的摄像镜头，其特征在于，所述第一透镜的有效焦距f1与所述负透镜的有效焦距fn满足-3.0＜f1/fn≤-0.5。
  27. 根据权利要求15至19中任一项所述的摄像镜头，其特征在于，所述摄像镜头的入瞳直径EPD与所述摄像镜头的最大半像高ImgH满足0.6≤EPD/ImgH≤0.8。
  28. 根据权利要求27所述的摄像镜头，其特征在于，所述摄像镜头的总有效焦距f与所述摄像镜头的入瞳直径EPD满足1.5≤f/EPD≤2.8。
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