WO2019210676A1 - 摄像镜头 - Google Patents

摄像镜头 Download PDF

Info

Publication number
WO2019210676A1
WO2019210676A1 PCT/CN2018/116307 CN2018116307W WO2019210676A1 WO 2019210676 A1 WO2019210676 A1 WO 2019210676A1 CN 2018116307 W CN2018116307 W CN 2018116307W WO 2019210676 A1 WO2019210676 A1 WO 2019210676A1
Authority
WO
WIPO (PCT)
Prior art keywords
lens
image pickup
focal length
image
optical axis
Prior art date
Application number
PCT/CN2018/116307
Other languages
English (en)
French (fr)
Inventor
贾远林
徐武超
Original Assignee
浙江舜宇光学有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 浙江舜宇光学有限公司 filed Critical 浙江舜宇光学有限公司
Publication of WO2019210676A1 publication Critical patent/WO2019210676A1/zh

Links

Images

Classifications

    • 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
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/06—Panoramic objectives; So-called "sky lenses" including panoramic objectives having reflecting surfaces
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration

Definitions

  • the present application relates to an imaging lens, and more particularly, to an imaging lens including six lenses.
  • the three-dimensional position and size information of the subject can be obtained through the three-dimensional depth camera, which is of great significance in the application of augmented reality (AR) technology.
  • AR augmented reality
  • Time of Flight (TOF) technology is one of the most important branching technologies for deep recognition technology.
  • TOF cameras are an extension of laser ranging technology. Unlike traditional single-detector single-point measurements, TOF cameras can use an array detector to measure a stereo space and obtain the entire image by detecting the flight (round-trip) time of the light pulse. Spatial information.
  • the camera lens used with it needs to have a super wide-angle feature such as a large relative aperture and a small principal ray incidence angle (CRA).
  • CRA principal ray incidence angle
  • the camera lens applied to the TOF camera also needs to have good temperature adaptability to eliminate temperature drift, so that it can better meet the application requirements of various special scenes.
  • the present application provides an optical 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, a second lens, a diaphragm, a third lens, a fourth lens, and a fifth lens. And a sixth lens.
  • the first lens may have a negative power
  • the second lens may have a negative power
  • the third lens has a power
  • the fourth lens may have a positive power
  • the fifth lens may have a positive power
  • the sixth lens has The power can be convex on the side of the image at the paraxial; in the glass-made lens between the pupil and the image side, the lens closest to the pupil can have positive power and the total effective focal length of the camera lens f
  • the EPD of the entrance pupil diameter with the camera lens can satisfy f/EPD ⁇ 2.
  • the total effective focal length f of the imaging lens and the effective focal length f5 of the fifth lens may satisfy f/f5 ⁇ 0.35.
  • the total effective focal length f of the imaging lens, the effective focal length f4 of the fourth lens, and the effective focal length f5 of the fifth lens may satisfy f/f4+f/f5 ⁇ 0.7.
  • the effective focal length f1 of the first lens and the effective focal length f2 of the second lens may satisfy 0.5 ⁇ f1/f2 ⁇ 1.5.
  • the total effective focal length f of the imaging lens, the radius of curvature R6 of the image side of the third lens, and the radius of curvature R8 of the image side of the fourth lens may satisfy f/(R6+R8)>-0.2.
  • the effective focal length f1 of the first lens, the effective focal length f2 of the second lens, the effective focal length f4 of the fourth lens, and the effective focal length f5 of the fifth lens may satisfy 1.5 ⁇ f1/f2+f4/f5 ⁇ 2.5 .
  • the radius of curvature R1 of the side surface of the first lens object and the radius of curvature R2 of the side surface of the first lens image may satisfy 1 ⁇ (R1+R2)/(R1-R2) ⁇ 2.
  • the object side surface of the fifth lens is a convex surface, and the radius of curvature R9 and the effective focal length f5 of the fifth lens may satisfy 0.3 ⁇ R9/f5 ⁇ 1.
  • the center thickness CT2 of the second lens on the optical axis and the center thickness CT3 of the third lens on the optical axis may satisfy 0.5 ⁇ CT2/CT3 ⁇ 1.
  • the center thickness CT6 of the sixth lens on the optical axis, the center thickness CT4 of the fourth lens on the optical axis, and the center thickness CT5 of the fifth lens on the optical axis can satisfy CT6/(CT4+CT5). ⁇ 0.2.
  • the distance between the fourth lens and the fifth lens on the optical axis is T45
  • the distance between the fifth lens and the sixth lens on the optical axis is T56
  • the first lens and the second lens are on the optical axis.
  • the separation distance T12 and the separation distance T23 of the second lens and the third lens on the optical axis satisfy (T45 + T56) / (T12 + T23) ⁇ 0.15.
  • the maximum effective radius DT21 of the object side of the second lens and the maximum effective radius DT42 of the side of the fourth lens image may satisfy 0.7 ⁇ DT21/DT42 ⁇ 1.2.
  • the maximum effective radius DT42 of the image side of the fourth lens and the maximum effective radius DT61 of the side of the sixth lens may satisfy 0.8 ⁇ DT42/DT61 ⁇ 1.3.
  • the maximum effective radius DT32 of the image side of the third lens and the half ImgH of the diagonal length of the effective pixel area on the imaging surface of the imaging lens may satisfy 0.5 ⁇ DT32/ImgH ⁇ 1.
  • a half of the diagonal length ImgH of the effective pixel area on the imaging surface of the imaging lens and the total effective focal length f of the imaging lens may satisfy ImgH/f>1.2.
  • At least one of the object side and the image side of the sixth lens has an inflection point, and the object side of the sixth lens has at least one convex surface from the paraxial to the far axis, and the image of the sixth lens
  • the distance from the intersection of the side surface and the optical axis to the effective radius apex of the sixth lens image side on the optical axis SAG62 and the center thickness CT6 of the sixth lens on the optical axis may satisfy 0 ⁇ SAG62/CT6 ⁇ 1.5.
  • the first lens and the fourth lens may each be a lens of a glass material, and at 20 ° C, the thermal expansion coefficient TCE1 of the first lens and the thermal expansion coefficient TCE4 of the fourth lens may satisfy TCE1+TCE4 ⁇ 15 ⁇ 10 -6 /°C.
  • the present application provides an imaging lens that sequentially includes an object from the object side to the image side along the optical axis: a first lens, a second lens, a diaphragm, a third lens, a fourth lens, and a fifth Lens and sixth lens.
  • the first lens may have a negative power
  • the second lens may have a negative power
  • the third lens has a power
  • the fourth lens may have a positive power
  • the fifth lens may have a positive power
  • the sixth lens has The power of the image may be convex at the paraxial side; in the glass material lens between the pupil and the image side, the lens closest to the pupil may have positive power, and the first lens and the fourth lens
  • Each of the lenses may be a glass material, and at 20 ° C, the thermal expansion coefficient TCE1 of the first lens and the thermal expansion coefficient TCE4 of the fourth lens may satisfy TCE1 + TCE4 ⁇ 15 ⁇ 10 -6 / ° C.
  • the present application provides an imaging lens that sequentially includes an object from the object side to the image side along the optical axis: a first lens, a second lens, a diaphragm, a third lens, a fourth lens, and a fifth Lens and sixth lens.
  • the first lens and the second lens may each have a negative power, and the fourth lens and the fifth lens may each have a positive power; the third lens and the sixth lens each have a power; between the pupil and the image side Among the glass-made lenses, the lens closest to the pupil may have a positive power; and at least one of the object side and the image side of the sixth lens may have an inflection point, and the object side of the sixth lens is from the paraxial to
  • the distal axis may have at least one convex surface, the image side of the sixth lens may be convex at the paraxial, and the distance from the intersection of the image side of the sixth lens and the optical axis to the effective radius apex of the side of the sixth lens image on the optical axis
  • the center thickness CT6 of the SAG 62 and the sixth lens on the optical axis can satisfy 0 ⁇ SAG62/CT6 ⁇ 1.5.
  • the present application provides an imaging lens that sequentially includes an object from the object side to the image side along the optical axis: a first lens, a second lens, a diaphragm, a third lens, a fourth lens, and a fifth Lens and sixth lens.
  • the first lens may have a negative power
  • the second lens may have a negative power
  • the third lens has a power
  • the fourth lens may have a positive power
  • the fifth lens may have a positive power
  • the sixth lens has The power of the image may be convex at the paraxial side; in the glass material lens between the pupil and the image side, the lens closest to the pupil may have positive power and the image side of the third lens
  • the maximum effective radius DT32 is half of the diagonal length ImgH of the effective pixel area on the imaging surface of the imaging lens, and can satisfy 0.5 ⁇ DT32/ImgH ⁇ 1.
  • the present application employs six lenses, and the optical imaging lens has a wide angle, a large aperture, and a low temperature drift by appropriately distributing the power, the surface shape, the center thickness of each lens, and the on-axis spacing between the lenses.
  • High image quality suitable for at least one beneficial effect such as TOF camera.
  • 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 Example 8.
  • 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. In each lens, the surface closer to the object side is referred to as the object side of the lens; in each lens, the surface closer to the image side is referred to as the image side of the lens.
  • the image pickup lens may include, for example, six lenses having powers, that is, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens.
  • the six lenses are sequentially arranged from the object side to the image side along the optical axis, and each adjacent lens has an air gap therebetween.
  • the first lens may have a negative power; the second lens may have a negative power; the third lens has a positive power or a negative power; and the fourth lens may have a positive power;
  • the image side of the second lens may be a concave surface.
  • the third lens may have positive power, and the image side may be convex.
  • the object side and the image side of the fourth lens may both be convex.
  • an aperture may be disposed between the second lens and the third lens to improve the imaging quality of the lens.
  • the image side from the pupil to the imaging lens sequentially includes a third lens, a fourth lens, a fifth lens, and a sixth lens, and at least one of the third lens, the fourth lens, the fifth lens, and the sixth lens may It is a lens made of glass. Among the glass-made lenses between the pupil and the image side, the lens closest to the pupil can have positive power.
  • TCE1 + TCE4 6.2 ⁇ 10 -6 / ° C.
  • the imaging lens of the present application may satisfy the conditional expression f/EPD ⁇ 2, where f is the total effective focal length of the imaging lens, and EPD is the entrance pupil diameter of the imaging lens. More specifically, f and EPD can further satisfy f/EPD ⁇ 1.5, for example, 1.22 ⁇ f / EPD ⁇ 1.25. Satisfying the conditional expression f/EPD ⁇ 2 is beneficial to obtain a larger amount of light entering the same focal length, and to improve the illumination of the image plane and the response of the chip, thereby reducing the power consumption of the system.
  • the imaging lens of the present application may satisfy the conditional expression f/f5 ⁇ 0.35, where f is the total effective focal length of the imaging lens and f5 is the effective focal length of the fifth lens. More specifically, f and f5 may further satisfy 0 ⁇ f / f5 ⁇ 0.35, for example, 0.15 ⁇ f / f5 ⁇ 0.34.
  • Reasonable configuration of the power of the fifth lens is beneficial to eliminate the axial chromatic aberration of the system and improve the imaging clarity of the lens when operating in the infrared wide band.
  • the imaging lens of the present application can satisfy the conditional expression ImgH/f>1.2, wherein ImgH is half of the diagonal length of the effective pixel area on the imaging surface of the imaging lens, and f is the total effective focal length of the imaging lens. . More specifically, ImgH and f can further satisfy 1.42 ⁇ ImgH / f ⁇ 1.52. Satisfying the conditional expression ImgH/f>1.2 is advantageous for obtaining an optical system having large image plane and super wide-angle characteristics.
  • the imaging lens of the present application may satisfy the conditional expression f/f4+f/f5 ⁇ 0.7, where f is the total effective focal length of the imaging lens, f4 is the effective focal length of the fourth lens, and f5 is the fifth The effective focal length of the lens. More specifically, f, f4, and f5 may further satisfy 0 ⁇ f / f4 + f / f5 ⁇ 0.7, for example, 0.39 ⁇ f / f4 + f / f5 ⁇ 0.61. Reasonable configuration of the system power is beneficial to eliminate the temperature drift of the system while ensuring the compactness of the optical system.
  • the imaging lens of the present application may satisfy the conditional expression 0.5 ⁇ f1/f2 ⁇ 1.5, where f1 is the effective focal length of the first lens and f2 is the effective focal length of the second lens. More specifically, f1 and f2 can further satisfy 0.61 ⁇ f1/f2 ⁇ 1.20. Properly arranging the powers of the first lens and the second lens facilitates sharing the large field of view of the object and correcting the off-axis aberration of the rear lens group (ie, the lens between the second lens and the image side), thereby Improve the image quality of the lens.
  • the imaging lens of the present application may satisfy the conditional expression f/(R6+R8)>-0.2, where f is the total effective focal length of the imaging lens, R6 is the radius of curvature of the side of the third lens image, R8 It is the radius of curvature of the side of the fourth lens image. More specifically, f, R6 and R8 may further satisfy -0.2 ⁇ f / (R6 + R8) ⁇ 0, for example, -0.19 ⁇ f / (R6 + R8) ⁇ -0.12. Satisfying the conditional expression f/(R6+R8)>-0.2 can effectively eliminate the spherical aberration of the system to obtain a high-definition image.
  • the imaging lens of the present application may satisfy the conditional expression 1.5 ⁇ f1/f2+f4/f5 ⁇ 2.5, where f1 is the effective focal length of the first lens, f2 is the effective focal length of the second lens, and f4 is The effective focal length of the fourth lens, f5 is the effective focal length of the fifth lens. More specifically, f1, f2, f4, and f5 further satisfy 1.66 ⁇ f1/f2 + f4 / f5 ⁇ 2.47. Reasonable configuration of the power of each lens is beneficial to eliminate system temperature drift and improve the performance of the lens under different temperature conditions.
  • the imaging lens of the present application may satisfy the conditional expression ⁇ R1+R2)/(R1-R2) ⁇ 2, where R1 is the radius of curvature of the side surface of the first lens object, and R2 is the first transparency.
  • R1 and R2 may further satisfy 1.5 ⁇ (R1 + R2) / (R1 - R2) ⁇ 2, for example, 1.54 ⁇ (R1 + R2) / (R1 - R2) ⁇ 1.88.
  • the conditional expression ⁇ ⁇ (R1 + R2) / (R1 - R2) ⁇ 2 is satisfied, the large field of view of the object can be effectively shared, and the processability and processability requirements of the lens can be satisfied.
  • the object side of the first lens may be a convex surface, and the image side may be a concave surface.
  • the object side of the fifth lens may be convex.
  • the radius of curvature R9 of the side surface of the fifth lens and the effective focal length f5 of the fifth lens may satisfy 0.3 ⁇ R9 / f5 ⁇ 1. More specifically, R9 and f5 can further satisfy 0.34 ⁇ R9 / f5 ⁇ 0.84. Satisfying the conditional expression 0.3 ⁇ R9/f5 ⁇ 1 ensures the matching of the lens chief ray angle (CRA) and effectively corrects the astigmatism and field curvature of the lens.
  • CRA lens chief ray angle
  • the imaging lens of the present application may satisfy the conditional expression 0.5 ⁇ CT2/CT3 ⁇ 1, where CT2 is the center thickness of the second lens on the optical axis, and CT3 is the center of the third lens on the optical axis. thickness. More specifically, CT2 and CT3 can further satisfy 0.52 ⁇ CT2 / CT3 ⁇ 0.92. Reasonably configuring the center thickness of the second lens and the third lens can effectively reduce the thickness sensitivity of the lens and correct the curvature of field.
  • the imaging lens of the present application may satisfy the conditional expression CT6/(CT4+CT5) ⁇ 0.2, where CT6 is the center thickness of the sixth lens on the optical axis, and CT4 is the fourth lens on the optical axis.
  • the center thickness of the CT5 is the center thickness of the fifth lens on the optical axis. More specifically, CT6, CT4 and CT5 can further satisfy 0.12 ⁇ CT6 / (CT4 + CT5) ⁇ 0.18.
  • Reasonable configuration of the center thickness of each lens is beneficial to meet the processability and processability requirements of the lens.
  • the imaging lens of the present application may satisfy the conditional expression (T45+T56)/(T12+T23) ⁇ 0.15, where T45 is the separation distance of the fourth lens and the fifth lens on the optical axis, T56 The distance between the fifth lens and the sixth lens on the optical axis, T12 is the distance between the first lens and the second lens on the optical axis, and T23 is the distance between the second lens and the third lens on the optical axis. More specifically, T45, T56, T12, and T23 may further satisfy 0 ⁇ (T45 + T56) / (T12 + T23) ⁇ 0.15, for example, 0.05 ⁇ (T45 + T56) / (T12 + T23) ⁇ 0.11. Reasonably arranging the distance between the axes of the lenses can effectively reduce the thickness sensitivity of the lens and correct the curvature of field.
  • the imaging lens of the present application may satisfy the conditional expression 0.7 ⁇ DT21/DT42 ⁇ 1.2, where DT21 is the maximum effective radius of the side of the second lens object, and DT42 is the maximum effective radius of the side of the fourth lens image. More specifically, DT21 and DT42 can further satisfy 0.76 ⁇ DT21 / DT42 ⁇ 1.11. Reasonably arranging the maximum effective radius of the side of the second lens and the side of the fourth lens image can better ensure the feasibility of the lens structure, thereby reducing the difficulty of assembly.
  • the imaging lens of the present application may satisfy the conditional expression 0.8 ⁇ DT42/DT61 ⁇ 1.3, wherein DT42 is the maximum effective radius of the side of the fourth lens image, and DT61 is the maximum effective radius of the side of the sixth lens object. More specifically, DT42 and DT61 can further satisfy 0.96 ⁇ DT42 / DT61 ⁇ 1.21. Reasonably arranging the maximum effective radius of the side of the fourth lens image and the side of the sixth lens object can better ensure the feasibility of the lens structure and meet the technical requirements.
  • the imaging lens of the present application can satisfy the conditional expression 0.5 ⁇ DT32/ImgH ⁇ 1, wherein DT32 is the maximum effective radius of the side of the third lens image, and ImgH is the effective pixel area pair on the imaging surface of the imaging lens. Half the length of the corner. More specifically, DT32 and ImgH can further satisfy 0.76 ⁇ DT32 / ImgH ⁇ 0.83. Satisfying the conditional formula 0.5 ⁇ DT32/ImgH ⁇ 1, it can effectively share the large field of view of the object and correct the F-theta distortion of the lens, thereby effectively improving the imaging quality of the optical system.
  • At least one of the object side and the image side of the sixth lens of the imaging lens of the present application has at least one inflection point whose object side has at least one convex surface from the paraxial to the distal axis.
  • the imaging lens of the present application can satisfy the conditional expression 0 ⁇ SAG62/CT6 ⁇ 1.5, wherein the SAG62 is the distance from the intersection of the sixth lens image side and the optical axis to the effective radius apex of the sixth lens image side on the optical axis, CT6 is the first The center thickness of the six lenses on the optical axis. More specifically, SAG62 and CT6 can further satisfy 0.04 ⁇ SAG62 / CT6 ⁇ 1.11. Properly configuring the lens surface shape can effectively eliminate the spherical aberration and coma of the system, thereby obtaining a high-definition image.
  • 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 image pickup lens according to the above embodiment of the present application may employ a plurality of lenses, such as the six sheets described above.
  • a plurality of lenses such as the six sheets described above.
  • the imaging lens is made more advantageous for production processing and can be applied to, for example, a TOF camera.
  • the imaging lens with the above configuration can have the beneficial effects of large aperture, super wide angle, low temperature drift, high imaging quality and the like.
  • an aspherical mirror surface is often used for each lens.
  • 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, improving image quality.
  • the image pickup lens is not limited to including six lenses.
  • the camera 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.
  • an imaging lens sequentially includes, from an object side to an image side along an optical axis, a first lens L1, a second lens L2, a stop STO, a third lens L3, and a fourth.
  • the lens L4 the fifth lens L5, the sixth lens L6, the filter L7, the cover glass L8, and the imaging surface S17.
  • the first lens L1 has a negative refractive power
  • the object side surface S1 is a convex surface
  • the image side surface S2 is a concave surface.
  • the second lens L2 has a negative refractive power
  • the object side surface S3 is a convex surface
  • the image side surface S4 is a concave surface.
  • the third lens L3 has a positive refractive power
  • the object side surface S5 is a concave surface
  • the image side surface S6 is a convex surface.
  • the fourth lens L4 has a positive refractive power
  • the object side surface S7 is a convex surface
  • the image side surface S8 is a convex surface.
  • the fifth lens L5 has a positive refractive power
  • the object side surface S9 is a convex surface
  • the image side surface S10 is a concave surface.
  • the sixth lens L6 has a negative refractive power
  • the object side surface S11 is a concave surface
  • the image side surface S12 is a convex surface.
  • the filter L7 has an object side surface S13 and an image side surface S14.
  • the cover glass L8 has an object side surface S15 and an image side surface S16. Light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging plane S17.
  • At least one of the object side S11 and the image side surface S12 of the sixth lens L6 has an inflection point, and the object side surface S11 has at least one convex surface from the paraxial to the far axis.
  • the first lens L1 and the fourth lens L4 may each be a glass lens.
  • 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 aspherical lens can be defined by using, but not limited to, the following aspherical 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 high order term coefficients A 4 , A 6 , A 8 , A 10 , A 12 , A 14 and A 16 which can be used for the respective aspherical mirror faces S3-S6 and S9-S12 in the embodiment 1.
  • Table 3 gives the optical total length TTL of the image pickup lens in Embodiment 1 (i.e., the distance from the center of the object side surface S1 of the first lens L1 to the imaging plane S17 on the optical axis), and the effective pixel area diagonal on the image plane S17.
  • the camera lens in Embodiment 1 satisfies:
  • f / EPD 1.22, where f is the total effective focal length of the camera lens, EPD is the entrance pupil diameter of the camera lens;
  • f/f5 0.24, where f is the total effective focal length of the imaging lens, and f5 is the effective focal length of the fifth lens L5;
  • ImgH/f 1.42, where ImgH is half of the diagonal length of the effective pixel area on the imaging surface S17 of the imaging lens, and f is the total effective focal length of the imaging lens;
  • f/f4+f/f5 0.49, where f is the total effective focal length of the imaging lens, f4 is the effective focal length of the fourth lens L4, and f5 is the effective focal length of the fifth lens L5;
  • F1/f2 1.06, where f1 is the effective focal length of the first lens L1, and f2 is the effective focal length of the second lens L2;
  • f / (R6 + R8) -0.16, where f is the total effective focal length of the imaging lens, R6 is the radius of curvature of the image side surface S6 of the third lens L3, and R8 is the radius of curvature of the image side surface S8 of the fourth lens L4;
  • F1/f2+f4/f5 2.08, where f1 is the effective focal length of the first lens L1, f2 is the effective focal length of the second lens L2, f4 is the effective focal length of the fourth lens L4, and f5 is effective for the fifth lens L5 focal length;
  • R1+R2)/(R1-R2) 1.83, where R1 is the radius of curvature of the object side surface S1 of the first lens L1, and R2 is the radius of curvature of the image side surface S2 of the first lens L1;
  • R9 / f5 0.53, wherein R9 is the radius of curvature of the object side surface S9 of the fifth lens L5, and f5 is the effective focal length of the fifth lens L5;
  • CT2/CT3 0.75, where CT2 is the center thickness of the second lens L2 on the optical axis, and CT3 is the center thickness of the third lens L3 on the optical axis;
  • CT6/(CT4+CT5) 0.14, where CT6 is the center thickness of the sixth lens L6 on the optical axis, CT4 is the center thickness of the fourth lens L4 on the optical axis, and CT5 is the fifth lens L5 on the optical axis. Center thickness
  • T45 is the separation distance of the fourth lens L4 and the fifth lens L5 on the optical axis
  • T56 is the fifth lens L5 and the sixth lens L6 on the optical axis.
  • the separation distance, T12 is the separation distance of the first lens L1 and the second lens L2 on the optical axis
  • T23 is the separation distance of the second lens L2 and the third lens L3 on the optical axis;
  • DT21 / DT42 0.97, wherein DT21 is the maximum effective radius of the object side surface S3 of the second lens L2, and DT42 is the maximum effective radius of the image side surface S8 of the fourth lens L4;
  • DT42 / DT61 1.16, wherein DT42 is the maximum effective radius of the image side surface S8 of the fourth lens L4, and DT61 is the maximum effective radius of the object side surface S11 of the sixth lens L6;
  • DT32 / ImgH 0.81, wherein DT32 is the maximum effective radius of the image side S6 of the third lens L3, and ImgH is half of the diagonal length of the effective pixel area on the imaging surface S17;
  • SAG62/CT6 0.39, wherein SAG62 is the distance from the intersection of the image side S12 and the optical axis of the sixth lens L6 to the effective radius apex of the image side S12 of the sixth lens L6 on the optical axis, and CT6 is the sixth lens L6 on the optical axis.
  • 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.
  • 2C shows a distortion curve of the imaging lens of Embodiment 1, which shows distortion magnitude values 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, from the object side to the image side along the optical axis, a first lens L1, a second lens L2, a stop STO, a third lens L3, and a fourth.
  • the lens L4 the fifth lens L5, the sixth lens L6, the filter L7, the cover glass L8, and the imaging surface S17.
  • the first lens L1 has a negative refractive power
  • the object side surface S1 is a convex surface
  • the image side surface S2 is a concave surface.
  • the second lens L2 has a negative refractive power
  • the object side surface S3 is a convex surface
  • the image side surface S4 is a concave surface.
  • the third lens L3 has a positive refractive power
  • the object side surface S5 is a concave surface
  • the image side surface S6 is a convex surface.
  • the fourth lens L4 has a positive refractive power
  • the object side surface S7 is a convex surface
  • the image side surface S8 is a convex surface.
  • the fifth lens L5 has a positive refractive power
  • the object side surface S9 is a convex surface
  • the image side surface S10 is a convex surface.
  • the sixth lens L6 has a negative refractive power
  • the object side surface S11 is a concave surface
  • the image side surface S12 is a convex surface.
  • the filter L7 has an object side surface S13 and an image side surface S14.
  • the cover glass L8 has an object side surface S15 and an image side surface S16. Light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the image plane S17.
  • At least one of the object side S11 and the image side surface S12 of the sixth lens L6 has an inflection point, and the object side surface S11 has at least one convex surface from the paraxial to the far axis.
  • the first lens L1 and the fourth lens L4 may each be a glass lens.
  • 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).
  • the object side surface and the image side surface of the first lens L1 and the fourth lens L4 are both spherical surfaces
  • the second lens L2, the third lens L3, the fifth lens L5, and the sixth lens L6 are The object side and the image side of any one of the lenses are aspherical.
  • Table 5 shows the high order coefficient which can be used for each aspherical mirror in Embodiment 2, wherein each aspherical surface type can be defined by the formula (1) given in the above Embodiment 1.
  • Table 6 gives the total optical length TTL of the imaging lens in Embodiment 2, half of the diagonal length of the effective pixel area on the imaging surface S17, ImgH, half of the maximum angle of view HFOV, total effective focal length f, and the effective focal length f1 of each lens. To f6.
  • 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.
  • 4C shows a distortion curve of the imaging lens of Embodiment 2, which shows distortion magnitude values 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, from the object side to the image side along the optical axis, a first lens L1, a second lens L2, a stop STO, a third lens L3, and a fourth.
  • the lens L4 the fifth lens L5, the sixth lens L6, the filter L7, the cover glass L8, and the imaging surface S17.
  • the first lens L1 has a negative refractive power
  • the object side surface S1 is a convex surface
  • the image side surface S2 is a concave surface.
  • the second lens L2 has a negative refractive power
  • the object side surface S3 is a concave surface
  • the image side surface S4 is a concave surface.
  • the third lens L3 has a positive refractive power
  • the object side surface S5 is a concave surface
  • the image side surface S6 is a convex surface.
  • the fourth lens L4 has a positive refractive power
  • the object side surface S7 is a convex surface
  • the image side surface S8 is a convex surface.
  • the fifth lens L5 has a positive refractive power
  • the object side surface S9 is a convex surface
  • the image side surface S10 is a convex surface.
  • the sixth lens L6 has a negative refractive power
  • the object side surface S11 is a concave surface
  • the image side surface S12 is a convex surface.
  • the filter L7 has an object side surface S13 and an image side surface S14.
  • the cover glass L8 has an object side surface S15 and an image side surface S16. Light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging plane S17.
  • At least one of the object side S11 and the image side surface S12 of the sixth lens L6 has an inflection point, and the object side surface S11 has at least one convex surface from the paraxial to the far axis.
  • the first lens L1 and the fourth lens L4 may each be a glass lens.
  • 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).
  • the object side surface and the image side surface of the first lens L1 and the fourth lens L4 are both spherical surfaces
  • the second lens L2, the third lens L3, the fifth lens L5, and the sixth lens L6 are The object side and the image side of any one of the lenses are aspherical.
  • 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 gives the total optical length TTL of the imaging lens in Embodiment 3, half of the diagonal length of the effective pixel area on the imaging surface S17, ImgH, half of the maximum angle of view HFOV, total effective focal length f, and the effective focal length f1 of each lens. To f6.
  • 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 distortion magnitude values 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, from the object side to the image side along the optical axis, a first lens L1, a second lens L2, a stop STO, a third lens L3, and a fourth.
  • the lens L4 the fifth lens L5, the sixth lens L6, the filter L7, the cover glass L8, and the imaging surface S17.
  • the first lens L1 has a negative refractive power
  • the object side surface S1 is a convex surface
  • the image side surface S2 is a concave surface.
  • the second lens L2 has a negative refractive power
  • the object side surface S3 is a convex surface
  • the image side surface S4 is a concave surface.
  • the third lens L3 has a positive refractive power
  • the object side surface S5 is a convex surface
  • the image side surface S6 is a convex surface.
  • the fourth lens L4 has a positive refractive power
  • the object side surface S7 is a convex surface
  • the image side surface S8 is a convex surface.
  • the fifth lens L5 has a positive refractive power
  • the object side surface S9 is a convex surface
  • the image side surface S10 is a concave surface.
  • the sixth lens L6 has a negative refractive power
  • the object side surface S11 is a concave surface
  • the image side surface S12 is a convex surface.
  • the filter L7 has an object side surface S13 and an image side surface S14.
  • the cover glass L8 has an object side surface S15 and an image side surface S16. Light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging plane S17.
  • At least one of the object side S11 and the image side surface S12 of the sixth lens L6 has an inflection point, and the object side surface S11 has at least one convex surface from the paraxial to the far axis.
  • the first lens L1 and the fourth lens L4 may each be a glass lens.
  • 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).
  • the object side surface and the image side surface of the first lens L1 and the fourth lens L4 are both spherical surfaces
  • the second lens L2, the third lens L3, the fifth lens L5, and the sixth lens L6 are The object side and the image side of any one of the lenses are aspherical.
  • 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 total optical length TTL of the imaging lens in Embodiment 4, half of the diagonal length of the effective pixel area on the imaging surface S17, ImgH, half of the maximum angle of view HFOV, total effective focal length f, and the effective focal length f1 of each lens. To f6.
  • 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 a 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, from the object side to the image side along the optical axis, a first lens L1, a second lens L2, a stop STO, a third lens L3, and a fourth.
  • the lens L4 the fifth lens L5, the sixth lens L6, the filter L7, the cover glass L8, and the imaging surface S17.
  • the first lens L1 has a negative refractive power
  • the object side surface S1 is a convex surface
  • the image side surface S2 is a concave surface.
  • the second lens L2 has a negative refractive power
  • the object side surface S3 is a convex surface
  • the image side surface S4 is a concave surface.
  • the third lens L3 has a positive refractive power
  • the object side surface S5 is a concave surface
  • the image side surface S6 is a convex surface.
  • the fourth lens L4 has a positive refractive power
  • the object side surface S7 is a convex surface
  • the image side surface S8 is a convex surface.
  • the fifth lens L5 has a positive refractive power
  • the object side surface S9 is a convex surface
  • the image side surface S10 is a concave surface.
  • the sixth lens L6 has a positive refractive power
  • the object side surface S11 is a convex surface
  • the image side surface S12 is a convex surface.
  • the filter L7 has an object side surface S13 and an image side surface S14.
  • the cover glass L8 has an object side surface S15 and an image side surface S16. Light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the image plane S17.
  • At least one of the object side S11 and the image side surface S12 of the sixth lens L6 has an inflection point, and the object side surface S11 has at least one convex surface from the paraxial to the far axis.
  • the first lens L1 and the fourth lens L4 may each be a glass lens.
  • 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).
  • the object side surface and the image side surface of the first lens L1 and the fourth lens L4 are both spherical surfaces
  • the second lens L2, the third lens L3, the fifth lens L5, and the sixth lens L6 are The object side and the image side of any one of the lenses are aspherical.
  • 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 gives the total optical length TTL of the imaging lens in Embodiment 5, half of the diagonal length of the effective pixel area on the imaging surface S17, ImgH, half of the maximum angle of view HFOV, total effective focal length f, and the effective focal length f1 of each lens. To f6.
  • 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, from the object side to the image side along the optical axis, a first lens L1, a second lens L2, a stop STO, a third lens L3, and a fourth.
  • the lens L4 the fifth lens L5, the sixth lens L6, the filter L7, the cover glass L8, and the imaging surface S17.
  • the first lens L1 has a negative refractive power
  • the object side surface S1 is a convex surface
  • the image side surface S2 is a concave surface.
  • the second lens L2 has a negative refractive power
  • the object side surface S3 is a convex surface
  • the image side surface S4 is a concave surface.
  • the third lens L3 has a positive refractive power
  • the object side surface S5 is a concave surface
  • the image side surface S6 is a convex surface.
  • the fourth lens L4 has a positive refractive power
  • the object side surface S7 is a convex surface
  • the image side surface S8 is a convex surface.
  • the fifth lens L5 has a positive refractive power
  • the object side surface S9 is a convex surface
  • the image side surface S10 is a concave surface.
  • the sixth lens L6 has a negative refractive power
  • the object side surface S11 is a concave surface
  • the image side surface S12 is a convex surface.
  • the filter L7 has an object side surface S13 and an image side surface S14.
  • the cover glass L8 has an object side surface S15 and an image side surface S16. Light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging plane S17.
  • At least one of the object side S11 and the image side surface S12 of the sixth lens L6 has an inflection point, and the object side surface S11 has at least one convex surface from the paraxial to the far axis.
  • the first lens L1 and the fourth lens L4 may each be a glass lens.
  • 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).
  • the object side surface and the image side surface of the first lens L1 and the fourth lens L4 are both spherical surfaces
  • the second lens L2, the third lens L3, the fifth lens L5, and the sixth lens L6 are The object side and the image side of any one of the lenses are aspherical.
  • 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 total optical length TTL of the image pickup lens of Example 6, half of the diagonal length of the effective pixel area on the image plane S17, ImgH, half of the maximum angle of view HFOV, total effective focal length f, and the effective focal length f1 of each lens. To f6.
  • 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 the distortion curve of the image pickup lens of Example 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, from the object side to the image side along the optical axis, a first lens L1, a second lens L2, a stop STO, a third lens L3, and a fourth.
  • the lens L4 the fifth lens L5, the sixth lens L6, the filter L7, the cover glass L8, and the imaging surface S17.
  • the first lens L1 has a negative refractive power
  • the object side surface S1 is a convex surface
  • the image side surface S2 is a concave surface.
  • the second lens L2 has a negative refractive power
  • the object side surface S3 is a convex surface
  • the image side surface S4 is a concave surface.
  • the third lens L3 has a positive refractive power
  • the object side surface S5 is a concave surface
  • the image side surface S6 is a convex surface.
  • the fourth lens L4 has a positive refractive power
  • the object side surface S7 is a convex surface
  • the image side surface S8 is a convex surface.
  • the fifth lens L5 has a positive refractive power
  • the object side surface S9 is a convex surface
  • the image side surface S10 is a convex surface.
  • the sixth lens L6 has a positive refractive power
  • the object side surface S11 is a concave surface
  • the image side surface S12 is a convex surface.
  • the filter L7 has an object side surface S13 and an image side surface S14.
  • the cover glass L8 has an object side surface S15 and an image side surface S16. Light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging plane S17.
  • At least one of the object side S11 and the image side surface S12 of the sixth lens L6 has an inflection point, and the object side surface S11 has at least one convex surface from the paraxial to the far axis.
  • the first lens L1 and the fourth lens L4 may each be a glass lens.
  • 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).
  • the object side surface and the image side surface of the first lens L1 and the fourth lens L4 are both spherical surfaces
  • the second lens L2, the third lens L3, the fifth lens L5, and the sixth lens L6 are The object side and the image side of any one of the lenses are aspherical.
  • 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 gives the total optical length TTL of the imaging lens in Embodiment 7, half of the diagonal length of the effective pixel area on the imaging surface S17, ImgH, half of the maximum angle of view HFOV, total effective focal length f, and the effective focal length f1 of each lens. To f6.
  • 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, from the object side to the image side along the optical axis, a first lens L1, a second lens L2, a stop STO, a third lens L3, and a fourth.
  • the lens L4 the fifth lens L5, the sixth lens L6, the filter L7, the cover glass L8, and the imaging surface S17.
  • the first lens L1 has a negative refractive power
  • the object side surface S1 is a convex surface
  • the image side surface S2 is a concave surface.
  • the second lens L2 has a negative refractive power
  • the object side surface S3 is a concave surface
  • the image side surface S4 is a concave surface.
  • the third lens L3 has a positive refractive power
  • the object side surface S5 is a concave surface
  • the image side surface S6 is a convex surface.
  • the fourth lens L4 has a positive refractive power
  • the object side surface S7 is a convex surface
  • the image side surface S8 is a convex surface.
  • the fifth lens L5 has a positive refractive power
  • the object side surface S9 is a convex surface
  • the image side surface S10 is a convex surface.
  • the sixth lens L6 has a negative refractive power
  • the object side surface S11 is a concave surface
  • the image side surface S12 is a convex surface.
  • the filter L7 has an object side surface S13 and an image side surface S14.
  • the cover glass L8 has an object side surface S15 and an image side surface S16. Light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the image plane S17.
  • At least one of the object side S11 and the image side surface S12 of the sixth lens L6 has an inflection point, and the object side surface S11 has at least one convex surface from the paraxial to the far axis.
  • the first lens L1 and the fourth lens L4 may each be a glass lens.
  • 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).
  • the object side surface and the image side surface of the first lens L1 and the fourth lens L4 are both spherical surfaces, and the second lens L2, the third lens L3, the fifth lens L5, and the sixth lens L6 are in the middle.
  • the object side and the image side of any one of the lenses are aspherical.
  • 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 optical total length TTL of the image pickup lens in Embodiment 8 (i.e., the distance from the center of the object side surface S1 of the first lens L1 to the imaging plane S17 on the optical axis), and the effective pixel area diagonal on the imaging surface S17.
  • 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.
  • Embodiments 1 to 8 respectively satisfy the relationship shown in Table 25.
  • the present application also provides an image forming apparatus whose electronic photosensitive element may be a photosensitive coupling element (CCD) or a complementary metal oxide semiconductor element (CMOS).
  • the imaging device may be a stand-alone imaging device such as a digital camera, or an imaging module integrated on a mobile electronic device such as a mobile phone.
  • the image forming apparatus is equipped with the above-described image pickup lens.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)

Abstract

一种摄像镜头，该镜头沿光轴由物侧至像侧依序包括：第一透镜（L1）、第二透镜（L2）、光阑（STO）、第三透镜（L3）、第四透镜（L4）、第五透镜（L5）和第六透镜（L6）。第一透镜（L1）具有负光焦度，第二透镜（L2）具有负光焦度；第三透镜（L3）具有光焦度；第四透镜（L4）具有正光焦度；第五透镜（L5）具有正光焦度；第六透镜（L6）具有光焦度，其像侧面（S12）于近轴处为凸面；在光阑（STO）与像侧之间的玻璃材质的透镜中，最靠近光阑（STO）的透镜具有正光焦度，以及摄像镜头的总有效焦距f与摄像镜头的入瞳直径EPD满足f/EPD＜2。

Description

摄像镜头
相关申请的交叉引用
本申请要求于2018年5月3日提交于中国国家知识产权局(CNIPA)的、专利申请号为201810412795.5的中国专利申请的优先权和权益，该中国专利申请通过引用整体并入本文。
技术领域
本申请涉及一种摄像镜头，更具体地，本申请涉及一种包括六片透镜的摄像镜头。
背景技术
近年来，随着深度识别技术的快速发展，通过三维深度相机便可以获得拍摄对象的三维位置及尺寸信息，这在增强现实(AR)技术应用中具有重要意义。
飞行时间(Time of Flight，TOF)技术是深度识别技术最重要的分支技术之一。TOF相机为激光测距技术的延伸，与传统的单探测器单点测量不同，TOF相机可利用阵列探测器对一个立体空间进行测量，并通过探测光脉冲的飞行(往返)时间获得整幅图像的空间信息。为了满足TOF相机的测量要求，其配套使用的摄像镜头需要具有大相对孔径、小主光线入射角(CRA)等超广角特点。另外，应用于TOF相机的摄像镜头还需要具有良好的温度适应性以消除温漂，从而可以较好地满足各类特殊场景的应用需求。
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光学成像镜头。
一方面，本申请提供了这样一种摄像镜头，该镜头沿光轴由物侧至像侧依序包括：第一透镜、第二透镜、光阑、第三透镜、第四透镜、第五透镜和第六透镜。第一透镜可具有负光焦度，第二透镜可具有负 光焦度；第三透镜具有光焦度；第四透镜可具有正光焦度；第五透镜可具有正光焦度；第六透镜具有光焦度，其像侧面于近轴处可为凸面；在光阑与像侧之间的玻璃材质的透镜中，最靠近光阑的透镜可具有正光焦度，以及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f/EPD＜2。
在一个实施方式中，摄像镜头的总有效焦距f与第五透镜的有效焦距f5可满足f/f5＜0.35。
在一个实施方式中，摄像镜头的总有效焦距f、第四透镜的有效焦距f4与第五透镜的有效焦距f5可满足f/f4+f/f5＜0.7。
在一个实施方式中，第一透镜的有效焦距f1与第二透镜的有效焦距f2可满足0.5＜f1/f2＜1.5。
在一个实施方式中，摄像镜头的总有效焦距f、第三透镜的像侧面的曲率半径R6与第四透镜的像侧面的曲率半径R8可满足f/(R6+R8)＞-0.2。
在一个实施方式中，第一透镜的有效焦距f1、第二透镜的有效焦距f2、第四透镜的有效焦距f4与第五透镜的有效焦距f5可满足1.5＜f1/f2+f4/f5＜2.5。
在一个实施方式中，第一透镜物侧面的曲率半径R1与第一透镜像侧面的曲率半径R2可满足1＜(R1+R2)/(R1-R2)＜2。
在一个实施方式中，第五透镜的物侧面为凸面，其曲率半径R9与第五透镜的有效焦距f5可满足0.3＜R9/f5＜1。
在一个实施方式中，第二透镜于光轴上的中心厚度CT2与第三透镜于光轴上的中心厚度CT3可满足0.5＜CT2/CT3＜1。
在一个实施方式中，第六透镜于光轴上的中心厚度CT6、第四透镜于光轴上的中心厚度CT4与第五透镜于光轴上的中心厚度CT5可满足CT6/(CT4+CT5)＜0.2。
在一个实施方式中，第四透镜和第五透镜在光轴上的间隔距离T45、第五透镜和第六透镜在光轴上的间隔距离T56、第一透镜和第二透镜在光轴上的间隔距离T12与第二透镜和第三透镜在光轴上的间隔距离T23满足(T45+T56)/(T12+T23)＜0.15。
在一个实施方式中，第二透镜的物侧面的最大有效半径DT21与第四透镜像侧面的最大有效半径DT42可满足0.7＜DT21/DT42＜1.2。
在一个实施方式中，第四透镜的像侧面的最大有效半径DT42与第六透镜物侧面的最大有效半径DT61可满足0.8＜DT42/DT61＜1.3。
在一个实施方式中，第三透镜的像侧面的最大有效半径DT32与摄像镜头的成像面上有效像素区域对角线长的一半ImgH可满足0.5＜DT32/ImgH＜1。
在一个实施方式中，摄像镜头的成像面上有效像素区域对角线长的一半ImgH与摄像镜头的总有效焦距f可满足ImgH/f＞1.2。
在一个实施方式中，第六透镜的物侧面和像侧面中的至少一个具有反曲点，且第六透镜的物侧面由近轴处至远轴处至少具有一凸面，以及第六透镜的像侧面和光轴的交点至第六透镜像侧面的有效半径顶点在光轴上的距离SAG62与第六透镜于光轴上的中心厚度CT6可满足0＜SAG62/CT6＜1.5。
在一个实施方式中，第一透镜和第四透镜均可为玻璃材料的透镜，且在20℃时，第一透镜的热膨胀系数TCE1与第四透镜的热膨胀系数TCE4可满足TCE1+TCE4＜15×10 -6/℃。
另一方面，本申请提供了这样一种摄像镜头，该镜头沿光轴由物侧至像侧依序包括：第一透镜、第二透镜、光阑、第三透镜、第四透镜、第五透镜和第六透镜。第一透镜可具有负光焦度，第二透镜可具有负光焦度；第三透镜具有光焦度；第四透镜可具有正光焦度；第五透镜可具有正光焦度；第六透镜具有光焦度，其像侧面于近轴处可为凸面；在光阑与像侧之间的玻璃材质的透镜中，最靠近光阑的透镜可具有正光焦度，以及第一透镜和第四透镜均可为玻璃材料的透镜，且在20℃时，第一透镜的热膨胀系数TCE1与第四透镜的热膨胀系数TCE4可满足TCE1+TCE4＜15×10 -6/℃。
另一方面，本申请提供了这样一种摄像镜头，该镜头沿光轴由物侧至像侧依序包括：第一透镜、第二透镜、光阑、第三透镜、第四透镜、第五透镜和第六透镜。第一透镜和第二透镜均可具有负光焦度，第四透镜和第五透镜均可具有正光焦度；第三透镜和第六透镜均具有 光焦度；在光阑与像侧之间的玻璃材质的透镜中，最靠近光阑的透镜可具有正光焦度；以及第六透镜的物侧面和像侧面中的至少一个可具有反曲点，第六透镜的物侧面由近轴处至远轴处可至少具有一凸面，第六透镜的像侧面于近轴处可为凸面，以及第六透镜的像侧面和光轴的交点至第六透镜像侧面的有效半径顶点在光轴上的距离SAG62与第六透镜于光轴上的中心厚度CT6可满足0＜SAG62/CT6＜1.5。
又一方面，本申请提供了这样一种摄像镜头，该镜头沿光轴由物侧至像侧依序包括：第一透镜、第二透镜、光阑、第三透镜、第四透镜、第五透镜和第六透镜。第一透镜可具有负光焦度，第二透镜可具有负光焦度；第三透镜具有光焦度；第四透镜可具有正光焦度；第五透镜可具有正光焦度；第六透镜具有光焦度，其像侧面于近轴处可为凸面；在光阑与像侧之间的玻璃材质的透镜中，最靠近光阑的透镜可具有正光焦度，以及第三透镜的像侧面的最大有效半径DT32与摄像镜头的成像面上有效像素区域对角线长的一半ImgH可满足0.5＜DT32/ImgH＜1。
本申请采用了六片透镜，通过合理分配各透镜的光焦度、面型、各透镜的中心厚度以及各透镜之间的轴上间距等，使得上述光学成像镜头具有广角、大孔径、低温漂、高成像质量、可适用于TOF相机等至少一个有益效果。
附图说明
结合附图，通过以下非限制性实施方式的详细描述，本申请的其他特征、目的和优点将变得更加明显。在附图中：
图1示出了根据本申请实施例1的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。
具体实施方式
为了更好地理解本申请，将参考附图对本申请的各个方面做出更详细的说明。应理解，这些详细说明只是对本申请的示例性实施方式的描述，而非以任何方式限制本申请的范围。在说明书全文中，相同的附图标号指代相同的元件。表述“和/或”包括相关联的所列项目中的一个或多个的任何和全部组合。
应注意，在本说明书中，第一、第二、第三等的表述仅用于将一个特征与另一个特征区分开来，而不表示对特征的任何限制。因此，在不背离本申请的教导的情况下，下文中讨论的第一透镜也可被称作第二透镜或第三透镜。
在附图中，为了便于说明，已稍微夸大了透镜的厚度、尺寸和形状。具体来讲，附图中所示的球面或非球面的形状通过示例的方式示 出。即，球面或非球面的形状不限于附图中示出的球面或非球面的形状。附图仅为示例而并非严格按比例绘制。
在本文中，近轴区域是指光轴附近的区域。若透镜表面为凸面且未界定该凸面位置时，则表示该透镜表面至少于近轴区域为凸面；若透镜表面为凹面且未界定该凹面位置时，则表示该透镜表面至少于近轴区域为凹面。每个透镜中，较靠近物侧的表面称为该透镜的物侧面；每个透镜中，较靠近像侧的表面称为该透镜的像侧面。
还应理解的是，用语“包括”、“包括有”、“具有”、“包含”和/或“包含有”，当在本说明书中使用时表示存在所陈述的特征、元件和/或部件，但不排除存在或附加有一个或多个其它特征、元件、部件和/或它们的组合。此外，当诸如“...中的至少一个”的表述出现在所列特征的列表之后时，修饰整个所列特征，而不是修饰列表中的单独元件。此外，当描述本申请的实施方式时，使用“可”表示“本申请的一个或多个实施方式”。并且，用语“示例性的”旨在指代示例或举例说明。
除非另外限定，否则本文中使用的所有用语(包括技术用语和科学用语)均具有与本申请所属领域普通技术人员的通常理解相同的含义。还应理解的是，用语(例如在常用词典中定义的用语)应被解释为具有与它们在相关技术的上下文中的含义一致的含义，并且将不被以理想化或过度正式意义解释，除非本文中明确如此限定。
需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互组合。下面将参考附图并结合实施例来详细说明本申请。
以下对本申请的特征、原理和其他方面进行详细描述。
根据本申请示例性实施方式的摄像镜头可包括例如六片具有光焦度的透镜，即，第一透镜、第二透镜、第三透镜、第四透镜、第五透镜和第六透镜。这六片透镜沿着光轴由物侧至像侧依序排列，且各相邻透镜之间均具有空气间隔。
在示例性实施方式中，第一透镜可具有负光焦度；第二透镜可具有负光焦度；第三透镜具有正光焦度或负光焦度；第四透镜可具有正 光焦度；第五透镜可具有正光焦度；第六透镜具有正光焦度或负光焦度，其像侧面在近轴处可为凸面。
在示例性实施方式中，第二透镜的像侧面可为凹面。
在示例性实施方式中，第三透镜可具有正光焦度，其像侧面可为凸面。
在示例性实施方式中，第四透镜的物侧面和像侧面均可为凸面。
可选地，在第二透镜与第三透镜之间可设置有光阑，以提升镜头的成像质量。从该光阑至摄像镜头的像侧依序包括第三透镜、第四透镜、第五透镜和第六透镜，而第三透镜、第四透镜、第五透镜和第六透镜中的至少一个可为玻璃材质的透镜。在光阑与像侧之间玻璃材质的透镜中，最靠近光阑的透镜可具有正光焦度。
在示例性实施方式中，本申请的摄像镜头的第一透镜和第四透镜均可采用玻璃材料制成，并且在20℃时，第一透镜的热膨胀系数TCE1与第四透镜的热膨胀系数TCE4可满足TCE1+TCE4＜15×10 -6/℃。更具体地，TCE1和TCE4进一步可满足TCE1+TCE4＜8×10 -6/℃，例如TCE1+TCE4＝6.2×10 -6/℃。采用热膨胀系数小的玻璃材料的透镜，有助于消除温漂，从而有利于保证镜头在不同温度条件下的光学性能。
在示例性实施方式中，本申请的摄像镜头可满足条件式f/EPD＜2，其中，f为摄像镜头的总有效焦距，EPD为摄像镜头的入瞳直径。更具体地，f和EPD进一步可满足f/EPD＜1.5，例如，1.22≤f/EPD≤1.25。满足条件式f/EPD＜2，有利于在相同焦距的情形下获得更大的进光量，提高像面的照度与芯片的响应，从而降低系统的功耗。
在示例性实施方式中，本申请的摄像镜头可满足条件式f/f5＜0.35，其中，f为摄像镜头的总有效焦距，f5为第五透镜的有效焦距。更具体地，f和f5进一步可满足0＜f/f5＜0.35，例如，0.15≤f/f5≤0.34。合理配置第五透镜的光焦度，有利于消除系统的轴向色差，提高镜头在红外宽波段下工作时的成像清晰度。
在示例性实施方式中，本申请的摄像镜头可满足条件式ImgH/f＞1.2，其中，ImgH为摄像镜头的成像面上有效像素区域对角线长的一半，f为摄像镜头的总有效焦距。更具体地，ImgH和f进一步可满足 1.42≤ImgH/f≤1.52。满足条件式ImgH/f＞1.2，有利于获得具有大像面、超广角特性的光学系统。
在示例性实施方式中，本申请的摄像镜头可满足条件式f/f4+f/f5＜0.7，其中，f为摄像镜头的总有效焦距，f4为第四透镜的有效焦距，f5为第五透镜的有效焦距。更具体地，f、f4和f5进一步可满足0＜f/f4+f/f5＜0.7，例如，0.39≤f/f4+f/f5≤0.61。合理配置系统光焦度，有利于在保证光学系统结构紧凑性的同时，消除系统的温漂。
在示例性实施方式中，本申请的摄像镜头可满足条件式0.5＜f1/f2＜1.5，其中，f1为第一透镜的有效焦距，f2为第二透镜的有效焦距。更具体地，f1和f2进一步可满足0.61≤f1/f2≤1.20。合理配置第一透镜和第二透镜的光焦度，有利于分担物方大视场并矫正其后透镜组(即，第二透镜与像侧之间的各透镜)的轴外像差，从而提高镜头的成像质量。
在示例性实施方式中，本申请的摄像镜头可满足条件式f/(R6+R8)＞-0.2，其中，f为摄像镜头的总有效焦距，R6为第三透镜像侧面的曲率半径，R8为第四透镜像侧面的曲率半径。更具体地，f、R6和R8进一步可满足-0.2＜f/(R6+R8)＜0，例如，-0.19≤f/(R6+R8)≤-0.12。满足条件式f/(R6+R8)＞-0.2，可有效消除系统球差，以获得高清晰度的图像。
在示例性实施方式中，本申请的摄像镜头可满足条件式1.5＜f1/f2+f4/f5＜2.5，其中，f1为第一透镜的有效焦距，f2为第二透镜的有效焦距，f4为第四透镜的有效焦距，f5为第五透镜的有效焦距。更具体地，f1、f2、f4和f5进一步可满足1.66≤f1/f2+f4/f5≤2.47。合理配置各透镜的光焦度，有利于消除系统温漂，提高镜头在不同温度条件下的工作性能。
在示例性实施方式中，本申请的摄像镜头可满足条件式1＜(R1+R2)/(R1-R2)＜2，其中，R1为第一透镜物侧面的曲率半径，R2为第一透镜像侧面的曲率半径。更具体地，R1和R2进一步可满足1.5＜(R1+R2)/(R1-R2)＜2，例如，1.54≤(R1+R2)/(R1-R2)≤1.88。满足条件式1＜(R1+R2)/(R1-R2)＜2，可有效分担物方大视场，并可满足透镜 的可加工性及工艺性要求。可选地，第一透镜的物侧面可为凸面，像侧面可为凹面。
在示例性实施方式中，第五透镜的物侧面可为凸面。第五透镜物侧面的曲率半径R9与第五透镜的有效焦距f5可满足0.3＜R9/f5＜1。更具体地，R9和f5进一步可满足0.34≤R9/f5≤0.84。满足条件式0.3＜R9/f5＜1，可确保镜头主光线角度(CRA)的匹配，并能有效地矫正镜头的像散和场曲。
在示例性实施方式中，本申请的摄像镜头可满足条件式0.5＜CT2/CT3＜1，其中，CT2为第二透镜于光轴上的中心厚度，CT3为第三透镜于光轴上的中心厚度。更具体地，CT2和CT3进一步可满足0.52≤CT2/CT3≤0.92。合理配置第二透镜和第三透镜的中心厚度，可有效降低镜头的厚度敏感性，矫正场曲。
在示例性实施方式中，本申请的摄像镜头可满足条件式CT6/(CT4+CT5)＜0.2，其中，CT6为第六透镜于光轴上的中心厚度，CT4为第四透镜于光轴上的中心厚度，CT5为第五透镜于光轴上的中心厚度。更具体地，CT6、CT4和CT5进一步可满足0.12≤CT6/(CT4+CT5)≤0.18。合理配置各透镜的中心厚度，有利于满足镜头的可加工性和工艺性要求。
在示例性实施方式中，本申请的摄像镜头可满足条件式(T45+T56)/(T12+T23)＜0.15，其中，T45为第四透镜和第五透镜在光轴上的间隔距离，T56为第五透镜和第六透镜在光轴上的间隔距离，T12为第一透镜和第二透镜在光轴上的间隔距离，T23为第二透镜和第三透镜在光轴上的间隔距离。更具体地，T45、T56、T12和T23进一步可满足0＜(T45+T56)/(T12+T23)＜0.15，例如，0.05≤(T45+T56)/(T12+T23)≤0.11。合理配置各透镜之间的轴上间隔距离，可以有效地降低镜头的厚度敏感性，矫正场曲。
在示例性实施方式中，本申请的摄像镜头可满足条件式0.7＜DT21/DT42＜1.2，其中，DT21为第二透镜物侧面的最大有效半径，DT42为第四透镜像侧面的最大有效半径。更具体地，DT21和DT42进一步可满足0.76≤DT21/DT42≤1.11。合理配置第二透镜物侧面和 第四透镜像侧面的最大有效半径，可更好地保证镜头结构上的可行性，从而降低组配难度。
在示例性实施方式中，本申请的摄像镜头可满足条件式0.8＜DT42/DT61＜1.3，其中，DT42为第四透镜像侧面的最大有效半径，DT61为第六透镜物侧面的最大有效半径。更具体地，DT42和DT61进一步可满足0.96≤DT42/DT61≤1.21。合理地配置第四透镜像侧面和第六透镜物侧面的最大有效半径，可更好地保证镜头结构上的可行性，满足工艺性要求。
在示例性实施方式中，本申请的摄像镜头可满足条件式0.5＜DT32/ImgH＜1，其中，DT32为第三透镜像侧面的最大有效半径，ImgH为摄像镜头的成像面上有效像素区域对角线长的一半。更具体地，DT32和ImgH进一步可满足0.76≤DT32/ImgH≤0.83。满足条件式0.5＜DT32/ImgH＜1，可以有效地分担物方大视场，并矫正镜头的F-theta畸变，从而有效地提升光学系统的成像品质。
在示例性实施方式中，本申请的摄像镜头的第六透镜的物侧面和像侧面中的至少一个具有至少一个反曲点，其物侧面由近轴处至远轴处至少具有一凸面。本申请的摄像镜头可满足条件式0＜SAG62/CT6＜1.5，其中，SAG62为第六透镜像侧面和光轴的交点至第六透镜像侧面的有效半径顶点在光轴上的距离，CT6为第六透镜于光轴上的中心厚度。更具体地，SAG62和CT6进一步可满足0.04≤SAG62/CT6≤1.11。合理配置透镜面型，可有效消除系统球差和彗差，从而获得高清晰度的图像。
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。
根据本申请的上述实施方式的摄像镜头可采用多片镜片，例如上文所述的六片。通过合理分配各透镜的光焦度、面型、各透镜的中心厚度以及各透镜之间的轴上间距等，可有效地缩小镜头的体积、降低镜头的敏感度并提高镜头的可加工性，使得摄像镜头更有利于生产加工并且可适用于例如TOF相机。同时，通过上述配置的摄像镜头可具有大孔径、超广角、低温漂、高成像质量等有益效果。
在本申请的实施方式中，各透镜多采用非球面镜面。非球面透镜的特点是：从透镜中心到透镜周边，曲率是连续变化的。与从透镜中心到透镜周边具有恒定曲率的球面透镜不同，非球面透镜具有更佳的曲率半径特性，具有改善歪曲像差及改善像散像差的优点。采用非球面透镜后，能够尽可能地消除在成像的时候出现的像差，从而改善成像质量。
然而，本领域的技术人员应当理解，在未背离本申请要求保护的技术方案的情况下，可改变构成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，虽然在实施方式中以六个透镜为例进行了描述，但是该摄像镜头不限于包括六个透镜。如果需要，该摄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，根据本申请示例性实施方式的摄像镜头沿光轴由物侧至像侧依序包括：第一透镜L1、第二透镜L2、光阑STO、第三透镜L3、第四透镜L4、第五透镜L5、第六透镜L6、滤光片L7、保护玻璃L8和成像面S17。
第一透镜L1具有负光焦度，其物侧面S1为凸面，像侧面S2为凹面。第二透镜L2具有负光焦度，其物侧面S3为凸面，像侧面S4为凹面。第三透镜L3具有正光焦度，其物侧面S5为凹面，像侧面S6为凸面。第四透镜L4具有正光焦度，其物侧面S7为凸面，像侧面S8为凸面。第五透镜L5具有正光焦度，其物侧面S9为凸面，像侧面S10为凹面。第六透镜L6具有负光焦度，其物侧面S11为凹面，像侧面S12为凸面。滤光片L7具有物侧面S13和像侧面S14。保护玻璃L8具有物侧面S15和像侧面S16。来自物体的光依序穿过各表面S1至S16并最终成像在成像面S17上。
可选地，第六透镜L6的物侧面S11和像侧面S12中的至少一个具有反曲点，且其物侧面S11由近轴处至远轴处至少具有一凸面。
可选地，第一透镜L1和第四透镜L4均可为玻璃材质的透镜，在温度为20℃时，第一透镜L1的热膨胀系数TCE1与第四透镜L4的热膨胀系数TCE4可满足TCE1+TCE4＜15×10 -6/℃，例如，TCE1+TCE4＝6.20×10 -6/℃。
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 PCTCN2018116307-appb-000001
表1
由表1可知，第一透镜L1和第四透镜L4的物侧面和像侧面均为球面，第二透镜L2、第三透镜L3、第五透镜L5和第六透镜L6中的任意一个透镜的物侧面和像侧面均为非球面。在本实施例中，各非球面透镜的面型x可利用但不限于以下非球面公式进行限定：
Figure PCTCN2018116307-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S3-S6和S9-S12的高次项系数A 4、A 6、A 8、A 10、A 12、A 14和A 16。
面号 A4 A6 A8 A10 A12 A14 A16
S3 1.5836E-02 -2.6666E-03 2.9852E-04 -2.2962E-05 1.0971E-06 -2.9136E-08 3.2691E-10
S4 4.3436E-02 -9.8628E-03 1.7447E-03 -2.1008E-04 1.5409E-05 -6.0632E-07 9.2628E-09
S5 -9.5673E-03 2.2314E-03 -2.9705E-03 1.7100E-03 -5.5348E-04 9.2375E-05 -6.2396E-06
S6 -5.1106E-03 6.8032E-04 -4.8858E-04 1.8181E-04 -3.9742E-05 4.7499E-06 -2.3699E-07
S9 -7.7264E-04 6.4836E-05 -5.6070E-05 1.1867E-05 -1.3509E-06 7.0631E-08 -1.3675E-09
S10 -4.1648E-03 -1.9279E-03 4.0289E-04 -3.3290E-05 1.3551E-06 -2.2680E-08 0.0000E+00
S11 -7.3987E-03 4.8901E-03 -1.1686E-03 1.4738E-04 -1.0047E-05 3.5766E-07 -5.2988E-09
S12 4.4143E-03 4.5404E-03 -6.9164E-04 6.8627E-06 6.1884E-06 -5.2554E-07 1.3404E-08
表2
表3给出实施例1中摄像镜头的光学总长度TTL(即，从第一透镜L1的物侧面S1的中心至成像面S17在光轴上的距离)、成像面S17上有效像素区域对角线长的一半ImgH、最大视场角的一半HFOV、总有效焦距f以及各透镜的有效焦距f1至f6。
TTL(mm) 23.70 f2(mm) -10.43
ImgH(mm) 2.98 f3(mm) 22.22
HFOV(°) 82.0 f4(mm) 8.74
f(mm) 2.10 f5(mm) 8.60
f1(mm) -11.10 f6(mm) -98.73
表3
实施例1中的摄像镜头满足：
f/EPD＝1.22，其中，f为摄像镜头的总有效焦距，EPD为摄像镜头的入瞳直径；
f/f5＝0.24，其中，f为摄像镜头的总有效焦距，f5为第五透镜L5的有效焦距；
ImgH/f＝1.42，其中，ImgH为摄像镜头的成像面S17上有效像素区域对角线长的一半，f为摄像镜头的总有效焦距；
f/f4+f/f5＝0.49，其中，f为摄像镜头的总有效焦距，f4为第四透镜L4的有效焦距，f5为第五透镜L5的有效焦距；
f1/f2＝1.06，其中，f1为第一透镜L1的有效焦距，f2为第二透镜L2的有效焦距；
f/(R6+R8)＝-0.16，其中，f为摄像镜头的总有效焦距，R6为第三透镜L3的像侧面S6的曲率半径，R8为第四透镜L4的像侧面S8的曲率半径；
f1/f2+f4/f5＝2.08，其中，f1为第一透镜L1的有效焦距，f2为第二透镜L2的有效焦距，f4为第四透镜L4的有效焦距，f5为第五透镜L5的有效焦距；
(R1+R2)/(R1-R2)＝1.83，其中，R1为第一透镜L1的物侧面S1的曲率半径，R2为第一透镜L1的像侧面S2的曲率半径；
R9/f5＝0.53，其中，R9为第五透镜L5的物侧面S9的曲率半径，f5为第五透镜L5的有效焦距；
CT2/CT3＝0.75，其中，CT2为第二透镜L2于光轴上的中心厚度，CT3为第三透镜L3于光轴上的中心厚度；
CT6/(CT4+CT5)＝0.14，其中，CT6为第六透镜L6于光轴上的中心厚度，CT4为第四透镜L4于光轴上的中心厚度，CT5为第五透镜L5于光轴上的中心厚度；
(T45+T56)/(T12+T23)＝0.06，其中，T45为第四透镜L4和第五透镜L5在光轴上的间隔距离，T56为第五透镜L5和第六透镜L6在光轴上的间隔距离，T12为第一透镜L1和第二透镜L2在光轴上的间隔距离，T23为第二透镜L2和第三透镜L3在光轴上的间隔距离；
DT21/DT42＝0.97，其中，DT21为第二透镜L2的物侧面S3的最大有效半径，DT42为第四透镜L4的像侧面S8的最大有效半径；
DT42/DT61＝1.16，其中，DT42为第四透镜L4的像侧面S8的最 大有效半径，DT61为第六透镜L6的物侧面S11的最大有效半径；
DT32/ImgH＝0.81，其中，DT32为第三透镜L3的像侧面S6的最大有效半径，ImgH为成像面S17上有效像素区域对角线长的一半；
SAG62/CT6＝0.39，其中，SAG62为第六透镜L6像侧面S12与光轴的交点至第六透镜L6像侧面S12的有效半径顶点在光轴上的距离，CT6为第六透镜L6于光轴上的中心厚度。
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，根据本申请示例性实施方式的摄像镜头沿光轴由物侧至像侧依序包括：第一透镜L1、第二透镜L2、光阑STO、第三透镜L3、第四透镜L4、第五透镜L5、第六透镜L6、滤光片L7、保护玻璃L8和成像面S17。
第一透镜L1具有负光焦度，其物侧面S1为凸面，像侧面S2为凹面。第二透镜L2具有负光焦度，其物侧面S3为凸面，像侧面S4为凹面。第三透镜L3具有正光焦度，其物侧面S5为凹面，像侧面S6为凸面。第四透镜L4具有正光焦度，其物侧面S7为凸面，像侧面S8为凸面。第五透镜L5具有正光焦度，其物侧面S9为凸面，像侧面S10为凸面。第六透镜L6具有负光焦度，其物侧面S11为凹面，像侧面S12为凸面。滤光片L7具有物侧面S13和像侧面S14。保护玻璃L8具有物侧面S15和像侧面S16。来自物体的光依序穿过各表面S1至 S16并最终成像在成像面S17上。
可选地，第六透镜L6的物侧面S11和像侧面S12中的至少一个具有反曲点，且其物侧面S11由近轴处至远轴处至少具有一凸面。
可选地，第一透镜L1和第四透镜L4均可为玻璃材质的透镜，在温度为20℃时，第一透镜L1的热膨胀系数TCE1与第四透镜L4的热膨胀系数TCE4可满足TCE1+TCE4＜15×10 -6/℃，例如，TCE1+TCE4＝6.20×10 -6/℃。
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)。
Figure PCTCN2018116307-appb-000003
表4
由表4可知，在实施例2中，第一透镜L1和第四透镜L4的物侧面和像侧面均为球面，第二透镜L2、第三透镜L3、第五透镜L5和第六透镜L6中的任意一个透镜的物侧面和像侧面均为非球面。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。
面号 A4 A6 A8 A10 A12 A14 A16
S3 1.0379E-02 -1.4159E-03 1.4706E-04 -1.0510E-05 4.4981E-07 -1.0611E-08 1.0630E-10
S4 2.1760E-02 -2.0676E-03 9.2515E-05 3.2006E-05 -6.3501E-06 4.2395E-07 -1.0467E-08
S5 -6.9179E-03 -8.5959E-04 4.8355E-04 -3.2387E-04 1.0386E-04 -1.7392E-05 1.1172E-06
S6 -4.1187E-03 -2.8168E-04 1.9812E-04 -9.2993E-05 2.3584E-05 -3.1125E-06 1.6892E-07
S9 -4.7398E-04 -6.0478E-05 -1.5006E-05 3.7920E-06 -5.1648E-07 2.9308E-08 -5.7860E-10
S10 -3.9816E-03 -1.1448E-03 2.5662E-04 -2.1711E-05 8.7167E-07 -1.3626E-08 0.0000E+00
S11 -4.5689E-03 3.3314E-03 -7.9059E-04 1.0077E-04 -7.0796E-06 2.6135E-07 -3.9778E-09
S12 5.6047E-03 2.9394E-03 -4.0752E-04 -4.5682E-06 4.7603E-06 -3.8732E-07 1.0370E-08
表5
表6给出实施例2中摄像镜头的光学总长度TTL、成像面S17上有效像素区域对角线长的一半ImgH、最大视场角的一半HFOV、总有效焦距f以及各透镜的有效焦距f1至f6。
TTL(mm) 23.77 f2(mm) -9.43
ImgH(mm) 3.09 f3(mm) 21.96
HFOV(°) 89.8 f4(mm) 8.74
f(mm) 2.08 f5(mm) 6.64
f1(mm) -10.87 f6(mm) -16.25
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，根据本申请示例性实施方式的摄像镜头沿光轴由物侧至像侧依序包括：第一透镜L1、第二透镜L2、光阑STO、第三透 镜L3、第四透镜L4、第五透镜L5、第六透镜L6、滤光片L7、保护玻璃L8和成像面S17。
第一透镜L1具有负光焦度，其物侧面S1为凸面，像侧面S2为凹面。第二透镜L2具有负光焦度，其物侧面S3为凹面，像侧面S4为凹面。第三透镜L3具有正光焦度，其物侧面S5为凹面，像侧面S6为凸面。第四透镜L4具有正光焦度，其物侧面S7为凸面，像侧面S8为凸面。第五透镜L5具有正光焦度，其物侧面S9为凸面，像侧面S10为凸面。第六透镜L6具有负光焦度，其物侧面S11为凹面，像侧面S12为凸面。滤光片L7具有物侧面S13和像侧面S14。保护玻璃L8具有物侧面S15和像侧面S16。来自物体的光依序穿过各表面S1至S16并最终成像在成像面S17上。
可选地，第六透镜L6的物侧面S11和像侧面S12中的至少一个具有反曲点，且其物侧面S11由近轴处至远轴处至少具有一凸面。
可选地，第一透镜L1和第四透镜L4均可为玻璃材质的透镜，在温度为20℃时，第一透镜L1的热膨胀系数TCE1与第四透镜L4的热膨胀系数TCE4可满足TCE1+TCE4＜15×10 -6/℃，例如，TCE1+TCE4＝6.20×10 -6/℃。
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)。
Figure PCTCN2018116307-appb-000004
Figure PCTCN2018116307-appb-000005
表7
由表7可知，在实施例3中，第一透镜L1和第四透镜L4的物侧面和像侧面均为球面，第二透镜L2、第三透镜L3、第五透镜L5和第六透镜L6中的任意一个透镜的物侧面和像侧面均为非球面。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。
面号 A4 A6 A8 A10 A12 A14 A16
S3 1.1960E-02 -1.5350E-03 1.5447E-04 -1.0828E-05 4.7275E-07 -1.1654E-08 1.2269E-10
S4 1.8064E-02 -5.1546E-04 -3.5303E-04 1.3201E-04 -2.0638E-05 1.5952E-06 -5.1269E-08
S5 -6.3949E-03 -5.2536E-04 2.0163E-04 -1.5532E-04 4.7779E-05 -7.5959E-06 4.2234E-07
S6 -3.9022E-03 -2.3770E-04 1.9054E-04 -8.6722E-05 2.0985E-05 -2.6340E-06 1.3626E-07
S9 -6.0141E-04 -3.4963E-05 -1.9827E-05 3.9694E-06 -4.7272E-07 2.5048E-08 -4.7100E-10
S10 -3.4010E-03 -1.3424E-03 2.8155E-04 -2.3023E-05 8.8562E-07 -1.3025E-08 0.0000E+00
S11 -6.0526E-03 3.9751E-03 -9.0663E-04 1.1150E-04 -7.6126E-06 2.7293E-07 -4.0034E-09
S12 4.6071E-03 2.7715E-03 -2.2814E-04 -4.6722E-05 9.2253E-06 -6.1656E-07 1.5052E-08
表8
表9给出实施例3中摄像镜头的光学总长度TTL、成像面S17上有效像素区域对角线长的一半ImgH、最大视场角的一半HFOV、总有效焦距f以及各透镜的有效焦距f1至f6。
TTL(mm) 23.61 f2(mm) -9.19
ImgH(mm) 3.10 f3(mm) 22.00
HFOV(°) 89.8 f4(mm) 8.73
f(mm) 2.08 f5(mm) 6.97
f1(mm) -11.05 f6(mm) -20.06
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，根据本申请示例性实施方式的摄像镜头沿光轴由物侧至像侧依序包括：第一透镜L1、第二透镜L2、光阑STO、第三透镜L3、第四透镜L4、第五透镜L5、第六透镜L6、滤光片L7、保护玻璃L8和成像面S17。
第一透镜L1具有负光焦度，其物侧面S1为凸面，像侧面S2为凹面。第二透镜L2具有负光焦度，其物侧面S3为凸面，像侧面S4为凹面。第三透镜L3具有正光焦度，其物侧面S5为凸面，像侧面S6为凸面。第四透镜L4具有正光焦度，其物侧面S7为凸面，像侧面S8为凸面。第五透镜L5具有正光焦度，其物侧面S9为凸面，像侧面S10为凹面。第六透镜L6具有负光焦度，其物侧面S11为凹面，像侧面S12为凸面。滤光片L7具有物侧面S13和像侧面S14。保护玻璃L8具有物侧面S15和像侧面S16。来自物体的光依序穿过各表面S1至S16并最终成像在成像面S17上。
可选地，第六透镜L6的物侧面S11和像侧面S12中的至少一个具有反曲点，且其物侧面S11由近轴处至远轴处至少具有一凸面。
可选地，第一透镜L1和第四透镜L4均可为玻璃材质的透镜，在温度为20℃时，第一透镜L1的热膨胀系数TCE1与第四透镜L4的热膨胀系数TCE4可满足TCE1+TCE4＜15×10 -6/℃，例如，TCE1+TCE4＝6.20×10 -6/℃。
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)。
Figure PCTCN2018116307-appb-000006
表10
由表10可知，在实施例4中，第一透镜L1和第四透镜L4的物侧面和像侧面均为球面，第二透镜L2、第三透镜L3、第五透镜L5和第六透镜L6中的任意一个透镜的物侧面和像侧面均为非球面。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。
面号 A4 A6 A8 A10 A12 A14 A16
S3 7.5161E-03 -7.1948E-04 6.9012E-05 -4.0557E-06 3.0670E-08 7.5520E-09 -2.5277E-10
S4 3.0729E-02 -7.1457E-03 1.5178E-03 -2.1213E-04 1.7437E-05 -7.4978E-07 1.2230E-08
S5 -3.4837E-03 -3.3882E-03 2.9224E-03 -1.5225E-03 4.3957E-04 -6.5803E-05 3.9676E-06
S6 -2.6958E-03 -5.9539E-04 2.7524E-04 -9.0519E-05 1.6607E-05 -1.4900E-06 4.6729E-08
S9 -4.5382E-04 1.4284E-05 -2.8537E-05 5.7652E-06 -6.7035E-07 3.5754E-08 -7.3428E-10
S10 -9.0816E-03 3.2631E-03 -8.6935E-04 1.0826E-04 -6.2047E-06 1.3419E-07 0.0000E+00
S11 -1.1785E-02 7.8391E-03 -1.7939E-03 2.0147E-04 -1.0974E-05 2.3643E-07 -2.3170E-10
S12 1.2147E-02 1.6876E-03 -1.5380E-04 -4.2011E-05 8.0933E-06 -5.3912E-07 1.2839E-08
表11
表12给出实施例4中摄像镜头的光学总长度TTL、成像面S17上有效像素区域对角线长的一半ImgH、最大视场角的一半HFOV、总有效焦距f以及各透镜的有效焦距f1至f6。
TTL(mm) 23.67 f2(mm) -13.93
ImgH(mm) 3.05 f3(mm) 16.52
HFOV(°) 85.8 f4(mm) 9.20
f(mm) 2.14 f5(mm) 9.00
f1(mm) -8.90 f6(mm) -94.37
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，根据本申请示例性实施方式的摄像镜头沿光轴由物侧至像侧依序包括：第一透镜L1、第二透镜L2、光阑STO、第三透镜L3、第四透镜L4、第五透镜L5、第六透镜L6、滤光片L7、保护玻璃L8和成像面S17。
第一透镜L1具有负光焦度，其物侧面S1为凸面，像侧面S2为凹面。第二透镜L2具有负光焦度，其物侧面S3为凸面，像侧面S4为凹面。第三透镜L3具有正光焦度，其物侧面S5为凹面，像侧面S6为凸面。第四透镜L4具有正光焦度，其物侧面S7为凸面，像侧面S8为凸面。第五透镜L5具有正光焦度，其物侧面S9为凸面，像侧面S10为凹面。第六透镜L6具有正光焦度，其物侧面S11为凸面，像侧面S12为凸面。滤光片L7具有物侧面S13和像侧面S14。保护玻璃L8具有物侧面S15和像侧面S16。来自物体的光依序穿过各表面S1至 S16并最终成像在成像面S17上。
可选地，第六透镜L6的物侧面S11和像侧面S12中的至少一个具有反曲点，且其物侧面S11由近轴处至远轴处至少具有一凸面。
可选地，第一透镜L1和第四透镜L4均可为玻璃材质的透镜，在温度为20℃时，第一透镜L1的热膨胀系数TCE1与第四透镜L4的热膨胀系数TCE4可满足TCE1+TCE4＜15×10 -6/℃，例如，TCE1+TCE4＝6.20×10 -6/℃。
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)。
Figure PCTCN2018116307-appb-000007
表13
由表13可知，在实施例5中，第一透镜L1和第四透镜L4的物侧面和像侧面均为球面，第二透镜L2、第三透镜L3、第五透镜L5和第六透镜L6中的任意一个透镜的物侧面和像侧面均为非球面。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。
面号 A4 A6 A8 A10 A12 A14 A16
S3 1.3401E-02 -2.0114E-03 2.0309E-04 -1.4180E-05 6.1578E-07 -1.4913E-08 1.5356E-10
S4 4.0017E-02 -7.8450E-03 1.2529E-03 -1.3774E-04 9.2415E-06 -3.4354E-07 5.3326E-09
S5 -8.2582E-03 -6.3018E-04 4.3026E-04 -3.8134E-04 1.4006E-04 -2.5462E-05 1.7511E-06
S6 -4.0055E-03 2.5488E-05 1.0616E-04 -8.3857E-05 2.6653E-05 -3.9448E-06 2.3001E-07
S9 -1.0002E-03 -7.9364E-05 1.2490E-06 1.4015E-08 -1.3717E-07 1.2644E-08 -3.1636E-10
S10 -4.5116E-03 -7.7644E-04 1.7465E-04 -1.4714E-05 6.2058E-07 -1.0734E-08 0.0000E+00
S11 -5.1102E-03 2.3461E-03 -4.4735E-04 5.0658E-05 -3.2579E-06 1.1409E-07 -1.7338E-09
S12 7.8520E-03 1.8555E-03 -2.8883E-04 1.1195E-05 2.5383E-07 -1.1581E-08 -6.9164E-10
表14
表15给出实施例5中摄像镜头的光学总长度TTL、成像面S17上有效像素区域对角线长的一半ImgH、最大视场角的一半HFOV、总有效焦距f以及各透镜的有效焦距f1至f6。
TTL(mm) 23.80 f2(mm) -9.68
ImgH(mm) 3.08 f3(mm) 20.95
HFOV(°) 88.0 f4(mm) 8.86
f(mm) 2.07 f5(mm) 13.39
f1(mm) -11.10 f6(mm) 59.94
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，根据本申请示例性实施方式的摄像镜头沿光轴由物侧至像侧依序包括：第一透镜L1、第二透镜L2、光阑STO、第三透 镜L3、第四透镜L4、第五透镜L5、第六透镜L6、滤光片L7、保护玻璃L8和成像面S17。
第一透镜L1具有负光焦度，其物侧面S1为凸面，像侧面S2为凹面。第二透镜L2具有负光焦度，其物侧面S3为凸面，像侧面S4为凹面。第三透镜L3具有正光焦度，其物侧面S5为凹面，像侧面S6为凸面。第四透镜L4具有正光焦度，其物侧面S7为凸面，像侧面S8为凸面。第五透镜L5具有正光焦度，其物侧面S9为凸面，像侧面S10为凹面。第六透镜L6具有负光焦度，其物侧面S11为凹面，像侧面S12为凸面。滤光片L7具有物侧面S13和像侧面S14。保护玻璃L8具有物侧面S15和像侧面S16。来自物体的光依序穿过各表面S1至S16并最终成像在成像面S17上。
可选地，第六透镜L6的物侧面S11和像侧面S12中的至少一个具有反曲点，且其物侧面S11由近轴处至远轴处至少具有一凸面。
可选地，第一透镜L1和第四透镜L4均可为玻璃材质的透镜，在温度为20℃时，第一透镜L1的热膨胀系数TCE1与第四透镜L4的热膨胀系数TCE4可满足TCE1+TCE4＜15×10 -6/℃，例如，TCE1+TCE4＝6.20×10 -6/℃。
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)。
Figure PCTCN2018116307-appb-000008
Figure PCTCN2018116307-appb-000009
表16
由表16可知，在实施例6中，第一透镜L1和第四透镜L4的物侧面和像侧面均为球面，第二透镜L2、第三透镜L3、第五透镜L5和第六透镜L6中的任意一个透镜的物侧面和像侧面均为非球面。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。
面号 A4 A6 A8 A10 A12 A14 A16
S3 1.1209E-02 -1.7714E-03 2.1529E-04 -1.6392E-05 7.2122E-07 -1.7590E-08 1.8578E-10
S4 3.6359E-02 -8.1563E-03 1.5303E-03 -1.8150E-04 1.3293E-05 -6.0267E-07 1.2949E-08
S5 -7.2492E-03 -5.0534E-04 5.9016E-05 -6.6260E-05 1.8536E-05 -2.8602E-06 1.3390E-07
S6 -3.1958E-03 1.1655E-04 -3.5776E-05 -1.1935E-05 8.0393E-06 -1.5316E-06 1.0547E-07
S9 -2.2312E-04 -2.2419E-04 3.0998E-05 -4.0945E-06 1.3580E-07 4.6599E-09 -2.3629E-10
S10 -5.1614E-03 -7.8925E-04 1.9989E-04 -1.8209E-05 8.0972E-07 -1.4193E-08 0.0000E+00
S11 -3.0895E-03 1.1205E-03 -1.2566E-04 8.7699E-06 -3.0223E-07 2.5938E-09 4.9564E-11
S12 7.1657E-03 8.7593E-04 7.6430E-05 -4.1004E-05 3.9332E-06 -1.5754E-07 2.3482E-09
表17
表18给出实施例6中摄像镜头的光学总长度TTL、成像面S17上有效像素区域对角线长的一半ImgH、最大视场角的一半HFOV、总有效焦距f以及各透镜的有效焦距f1至f6。
TTL(mm) 23.80 f2(mm) -10.89
ImgH(mm) 2.94 f3(mm) 20.16
HFOV(°) 82.0 f4(mm) 8.72
f(mm) 2.02 f5(mm) 10.93
f1(mm) -9.49 f6(mm) -73.81
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，根据本申请示例性实施方式的摄像镜头沿光轴由物侧至像侧依序包括：第一透镜L1、第二透镜L2、光阑STO、第三透镜L3、第四透镜L4、第五透镜L5、第六透镜L6、滤光片L7、保护玻璃L8和成像面S17。
第一透镜L1具有负光焦度，其物侧面S1为凸面，像侧面S2为凹面。第二透镜L2具有负光焦度，其物侧面S3为凸面，像侧面S4为凹面。第三透镜L3具有正光焦度，其物侧面S5为凹面，像侧面S6为凸面。第四透镜L4具有正光焦度，其物侧面S7为凸面，像侧面S8为凸面。第五透镜L5具有正光焦度，其物侧面S9为凸面，像侧面S10为凸面。第六透镜L6具有正光焦度，其物侧面S11为凹面，像侧面S12为凸面。滤光片L7具有物侧面S13和像侧面S14。保护玻璃L8具有物侧面S15和像侧面S16。来自物体的光依序穿过各表面S1至S16并最终成像在成像面S17上。
可选地，第六透镜L6的物侧面S11和像侧面S12中的至少一个具有反曲点，且其物侧面S11由近轴处至远轴处至少具有一凸面。
可选地，第一透镜L1和第四透镜L4均可为玻璃材质的透镜，在温度为20℃时，第一透镜L1的热膨胀系数TCE1与第四透镜L4的热膨胀系数TCE4可满足TCE1+TCE4＜15×10 -6/℃，例如，TCE1+TCE4＝6.20×10 -6/℃。
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)。
Figure PCTCN2018116307-appb-000010
表19
由表19可知，在实施例7中，第一透镜L1和第四透镜L4的物侧面和像侧面均为球面，第二透镜L2、第三透镜L3、第五透镜L5和第六透镜L6中的任意一个透镜的物侧面和像侧面均为非球面。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。
面号 A4 A6 A8 A10 A12 A14 A16
S3 3.1807E-02 -1.1208E-02 4.9184E-03 -1.5307E-03 2.8436E-04 -2.8601E-05 1.1676E-06
S4 7.4495E-02 -3.5411E-02 3.3810E-02 -2.0787E-02 7.3112E-03 -1.2941E-03 8.6690E-05
S5 -7.0304E-03 -1.8580E-03 1.7914E-03 -1.2059E-03 4.4924E-04 -8.9098E-05 7.4382E-06
S6 -8.0134E-03 8.9854E-04 -1.9650E-04 -2.3570E-05 2.5081E-05 -5.2286E-06 3.6868E-07
S9 -1.4621E-03 -6.3427E-05 -2.1789E-05 6.5942E-06 -9.3453E-07 5.7467E-08 -1.2579E-09
S10 -6.5519E-03 5.2568E-04 -1.3790E-04 2.0792E-05 -1.3067E-06 3.0179E-08 0.0000E+00
S11 -1.5685E-02 8.7272E-03 -1.7099E-03 1.6586E-04 -7.8302E-06 1.3556E-07 5.3855E-10
S12 -4.3383E-03 4.9975E-03 -1.2205E-04 -1.3975E-04 2.1530E-05 -1.2986E-06 2.9171E-08
表20
表21给出实施例7中摄像镜头的光学总长度TTL、成像面S17上有效像素区域对角线长的一半ImgH、最大视场角的一半HFOV、总有效焦距f以及各透镜的有效焦距f1至f6。
TTL(mm) 17.22 f2(mm) -10.10
ImgH(mm) 3.13 f3(mm) 22.82
HFOV(°) 88.0 f4(mm) 8.28
f(mm) 2.07 f5(mm) 6.16
f1(mm) -6.18 f6(mm) 53.85
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，根据本申请示例性实施方式的摄像镜头沿光轴由物侧至像侧依序包括：第一透镜L1、第二透镜L2、光阑STO、第三透镜L3、第四透镜L4、第五透镜L5、第六透镜L6、滤光片L7、保护玻璃L8和成像面S17。
第一透镜L1具有负光焦度，其物侧面S1为凸面，像侧面S2为凹面。第二透镜L2具有负光焦度，其物侧面S3为凹面，像侧面S4为凹面。第三透镜L3具有正光焦度，其物侧面S5为凹面，像侧面S6为凸面。第四透镜L4具有正光焦度，其物侧面S7为凸面，像侧面S8为凸面。第五透镜L5具有正光焦度，其物侧面S9为凸面，像侧面S10为凸面。第六透镜L6具有负光焦度，其物侧面S11为凹面，像侧面S12为凸面。滤光片L7具有物侧面S13和像侧面S14。保护玻璃L8具有物侧面S15和像侧面S16。来自物体的光依序穿过各表面S1至 S16并最终成像在成像面S17上。
可选地，第六透镜L6的物侧面S11和像侧面S12中的至少一个具有反曲点，且其物侧面S11由近轴处至远轴处至少具有一凸面。
可选地，第一透镜L1和第四透镜L4均可为玻璃材质的透镜，在温度为20℃时，第一透镜L1的热膨胀系数TCE1与第四透镜L4的热膨胀系数TCE4可满足TCE1+TCE4＜15×10 -6/℃，例如，TCE1+TCE4＝6.20×10 -6/℃。
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)。
Figure PCTCN2018116307-appb-000011
表22
由表22可知，在实施例8中，第一透镜L1和第四透镜L4的物侧面和像侧面均为球面，第二透镜L2、第三透镜L3、第五透镜L5和第六透镜L6中的任意一个透镜的物侧面和像侧面均为非球面。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。
面号 A4 A6 A8 A10 A12 A14 A16
S3 1.5268E-02 -2.2660E-03 2.7092E-04 -2.2732E-05 1.1578E-06 -3.3521E-08 4.2793E-10
S4 2.3294E-02 -1.0438E-03 -2.7677E-04 1.3560E-04 -1.8941E-05 8.4797E-07 -5.2300E-09
S5 -6.5665E-03 -1.1304E-03 1.2817E-03 -9.0401E-04 3.2768E-04 -6.0374E-05 4.5256E-06
S6 -5.4712E-03 -8.4550E-04 6.1168E-04 -2.5402E-04 5.9859E-05 -7.5002E-06 4.0146E-07
S9 -1.7822E-03 5.7135E-05 -1.5341E-04 3.8107E-05 -5.4527E-06 3.8951E-07 -1.0690E-08
S10 -5.8428E-03 -4.2332E-04 1.2510E-04 -1.3009E-05 7.3695E-07 -1.6853E-08 0.0000E+00
S11 -3.8952E-03 2.9092E-03 -5.5515E-04 4.6388E-05 -1.0139E-06 -6.5090E-08 2.8463E-09
S12 7.8033E-03 8.3146E-04 1.8663E-04 -1.0627E-04 1.4408E-05 -8.4918E-07 1.9118E-08
表23
表24给出实施例8中摄像镜头的光学总长度TTL(即，从第一透镜L1的物侧面S1的中心至成像面S17在光轴上的距离)、成像面S17上有效像素区域对角线长的一半ImgH、最大视场角的一半HFOV、总有效焦距f以及各透镜的有效焦距f1至f6。
TTL(mm) 22.35 f2(mm) -7.93
ImgH(mm) 2.98 f3(mm) 78.58
HFOV(°) 82.0 f4(mm) 6.50
f(mm) 2.04 f5(mm) 6.93
f1(mm) -9.46 f6(mm) -23.09
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。
综上，实施例1至实施例8分别满足表25中所示的关系。
Figure PCTCN2018116307-appb-000012
Figure PCTCN2018116307-appb-000013
表25
本申请还提供一种成像装置，其电子感光元件可以是感光耦合元件(CCD)或互补性氧化金属半导体元件(CMOS)。成像装置可以是诸如数码相机的独立成像设备，也可以是集成在诸如手机等移动电子设备上的成像模块。该成像装置装配有以上描述的摄像镜头。
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 (49)

  1. 摄像镜头，沿光轴由物侧至像侧依序包括：第一透镜、第二透镜、光阑、第三透镜、第四透镜、第五透镜和第六透镜，其特征在于，
    所述第一透镜具有负光焦度，
    所述第二透镜具有负光焦度；
    所述第三透镜具有光焦度；
    所述第四透镜具有正光焦度；
    所述第五透镜具有正光焦度；
    所述第六透镜具有光焦度，其像侧面于近轴处为凸面；
    在所述光阑与所述像侧之间的玻璃材质的透镜中，最靠近所述光阑的透镜具有正光焦度，以及
    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f/EPD＜2。
  2. 根据权利要求1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与所述第五透镜的有效焦距f5满足f/f5＜0.35。
  3. 根据权利要求1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、所述第四透镜的有效焦距f4与所述第五透镜的有效焦距f5满足f/f4+f/f5＜0.7。
  4. 根据权利要求1所述的摄像镜头，其特征在于，所述第一透镜的有效焦距f1与所述第二透镜的有效焦距f2满足0.5＜f1/f2＜1.5。
  5. 根据权利要求1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、所述第三透镜的像侧面的曲率半径R6与所述第四透镜的像侧面的曲率半径R8满足f/(R6+R8)＞-0.2。
  6. 根据权利要求3或4所述的摄像镜头，其特征在于，所述第一透镜的有效焦距f1、所述第二透镜的有效焦距f2、所述第四透镜的有 效焦距f4与所述第五透镜的有效焦距f5满足1.5＜f1/f2+f4/f5＜2.5。
  7. 根据权利要求1所述的摄像镜头，其特征在于，所述第一透镜物侧面的曲率半径R1与所述第一透镜像侧面的曲率半径R2满足1＜(R1+R2)/(R1-R2)＜2。
  8. 根据权利要求2所述的摄像镜头，其特征在于，所述第五透镜的物侧面为凸面，其曲率半径R9与所述第五透镜的有效焦距f5满足0.3＜R9/f5＜1。
  9. 根据权利要求1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与所述第三透镜于所述光轴上的中心厚度CT3满足0.5＜CT2/CT3＜1。
  10. 根据权利要求1所述的摄像镜头，其特征在于，所述第六透镜于所述光轴上的中心厚度CT6、所述第四透镜于所述光轴上的中心厚度CT4与所述第五透镜于所述光轴上的中心厚度CT5满足CT6/(CT4+CT5)＜0.2。
  11. 根据权利要求9或10所述的摄像镜头，其特征在于，满足(T45+T56)/(T12+T23)＜0.15，
    T45为所述第四透镜和所述第五透镜在所述光轴上的间隔距离，T56为所述第五透镜和所述第六透镜在所述光轴上的间隔距离，T12为所述第一透镜和所述第二透镜在所述光轴上的间隔距离，T23为所述第二透镜和所述第三透镜在所述光轴上的间隔距离。
  12. 根据权利要求1所述的摄像镜头，其特征在于，所述第二透镜的物侧面的最大有效半径DT21与所述第四透镜像侧面的最大有效半径DT42满足0.7＜DT21/DT42＜1.2。
  13. 根据权利要求1或12所述的摄像镜头，其特征在于，所述第四透镜的像侧面的最大有效半径DT42与所述第六透镜的物侧面的最大有效半径DT61满足0.8＜DT42/DT61＜1.3。
  14. 根据权利要求1所述的摄像镜头，其特征在于，所述第三透镜的像侧面的最大有效半径DT32与所述摄像镜头的成像面上有效像素区域对角线长的一半ImgH满足0.5＜DT32/ImgH＜1。
  15. 根据权利要求14所述的摄像镜头，其特征在于，所述摄像镜头的成像面上有效像素区域对角线长的一半ImgH与所述摄像镜头的总有效焦距f满足ImgH/f＞1.2。
  16. 根据权利要求1所述的摄像镜头，其特征在于，所述第六透镜的物侧面和像侧面中的至少一个具有反曲点，且所述第六透镜的物侧面由近轴处至远轴处至少具有一凸面，以及
    所述第六透镜的像侧面和所述光轴的交点至所述第六透镜像侧面的有效半径顶点在所述光轴上的距离SAG62与所述第六透镜于所述光轴上的中心厚度CT6满足0＜SAG62/CT6＜1.5。
  17. 根据权利要求1所述的摄像镜头，其特征在于，所述第一透镜和所述第四透镜均为玻璃材料的透镜，且在20℃时，所述第一透镜的热膨胀系数TCE1与所述第四透镜的热膨胀系数TCE4满足TCE1+TCE4＜15×10 -6/℃。
  18. 摄像镜头，沿光轴由物侧至像侧依序包括：第一透镜、第二透镜、光阑、第三透镜、第四透镜、第五透镜和第六透镜，其特征在于，
    所述第一透镜具有负光焦度，
    所述第二透镜具有负光焦度；
    所述第三透镜具有光焦度；
    所述第四透镜具有正光焦度；
    所述第五透镜具有正光焦度；
    所述第六透镜具有光焦度，其像侧面于近轴处为凸面；
    在所述光阑与所述像侧之间的玻璃材质的透镜中，最靠近所述光阑的透镜具有正光焦度，以及
    所述第一透镜和所述第四透镜均为玻璃材料的透镜，且在20℃时，所述第一透镜的热膨胀系数TCE1与所述第四透镜的热膨胀系数TCE4满足TCE1+TCE4＜15×10 -6/℃。
  19. 根据权利要求18所述的摄像镜头，其特征在于，所述第一透镜的有效焦距f1与所述第二透镜的有效焦距f2满足0.5＜f1/f2＜1.5。
  20. 根据权利要求18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与所述第五透镜的有效焦距f5满足f/f5＜0.35。
  21. 根据权利要求18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、所述第四透镜的有效焦距f4与所述第五透镜的有效焦距f5满足f/f4+f/f5＜0.7。
  22. 根据权利要求18所述的摄像镜头，其特征在于，所述第一透镜的有效焦距f1、所述第二透镜的有效焦距f2、所述第四透镜的有效焦距f4与所述第五透镜的有效焦距f5满足1.5＜f1/f2+f4/f5＜2.5。
  23. 根据权利要求18所述的摄像镜头，其特征在于，所述第一透镜物侧面的曲率半径R1与所述第一透镜像侧面的曲率半径R2满足1＜(R1+R2)/(R1-R2)＜2。
  24. 根据权利要求18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、所述第三透镜的像侧面的曲率半径R6与所述第四透镜的像侧面的曲率半径R8满足f/(R6+R8)＞-0.2。
  25. 根据权利要求18所述的摄像镜头，其特征在于，所述第五透镜的物侧面为凸面，其曲率半径R9与所述第五透镜的有效焦距f5满足0.3＜R9/f5＜1。
  26. 根据权利要求18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与所述第三透镜于所述光轴上的中心厚度CT3满足0.5＜CT2/CT3＜1。
  27. 根据权利要求18所述的摄像镜头，其特征在于，所述第六透镜于所述光轴上的中心厚度CT6、所述第四透镜于所述光轴上的中心厚度CT4与所述第五透镜于所述光轴上的中心厚度CT5满足CT6/(CT4+CT5)＜0.2。
  28. 根据权利要求18所述的摄像镜头，其特征在于，满足(T45+T56)/(T12+T23)＜0.15，
    T45为所述第四透镜和所述第五透镜在所述光轴上的间隔距离，T56为所述第五透镜和所述第六透镜在所述光轴上的间隔距离，T12为所述第一透镜和所述第二透镜在所述光轴上的间隔距离，T23为所述第二透镜和所述第三透镜在所述光轴上的间隔距离。
  29. 根据权利要求18所述的摄像镜头，其特征在于，所述第二透镜的物侧面的最大有效半径DT21与所述第四透镜像侧面的最大有效半径DT42满足0.7＜DT21/DT42＜1.2。
  30. 根据权利要求18所述的摄像镜头，其特征在于，所述第四透镜的像侧面的最大有效半径DT42与所述第六透镜的物侧面的最大有效半径DT61满足0.8＜DT42/DT61＜1.3。
  31. 根据权利要求18所述的摄像镜头，其特征在于，所述第三透 镜的像侧面的最大有效半径DT32与所述摄像镜头的成像面上有效像素区域对角线长的一半ImgH满足0.5＜DT32/ImgH＜1。
  32. 根据权利要求18所述的摄像镜头，其特征在于，所述第六透镜的物侧面和像侧面中的至少一个具有反曲点，且所述第六透镜的物侧面由近轴处至远轴处至少具有一凸面，以及
    所述第六透镜的像侧面和所述光轴的交点至所述第六透镜像侧面的有效半径顶点在所述光轴上的距离SAG62与所述第六透镜于所述光轴上的中心厚度CT6满足0＜SAG62/CT6＜1.5。
  33. 根据权利要求18所述的摄像镜头，其特征在于，所述摄像镜头的成像面上有效像素区域对角线长的一半ImgH与所述摄像镜头的总有效焦距f满足ImgH/f＞1.2。
  34. 根据权利要求18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f/EPD＜2。
  35. 摄像镜头，沿光轴由物侧至像侧依序包括：第一透镜、第二透镜、光阑、第三透镜、第四透镜、第五透镜和第六透镜，其特征在于，
    所述第一透镜和所述第二透镜均具有负光焦度，
    所述第四透镜和所述第五透镜均具有正光焦度；
    所述第三透镜和所述第六透镜均具有光焦度；
    在所述光阑与所述像侧之间的玻璃材质的透镜中，最靠近所述光阑的透镜具有正光焦度；以及
    所述第六透镜的物侧面和像侧面中的至少一个具有反曲点，所述第六透镜的物侧面由近轴处至远轴处至少具有一凸面，所述第六透镜的像侧面于近轴处为凸面，以及所述第六透镜的像侧面和所述光轴的交点至所述第六透镜像侧面的有效半径顶点在所述光轴上的距离SAG62与所述第六透镜于所述光轴上的中心厚度CT6满足0＜ SAG62/CT6＜1.5。
  36. 根据权利要求35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与所述第五透镜的有效焦距f5满足f/f5＜0.35。
  37. 根据权利要求35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、所述第四透镜的有效焦距f4与所述第五透镜的有效焦距f5满足f/f4+f/f5＜0.7。
  38. 根据权利要求35所述的摄像镜头，其特征在于，所述第一透镜的有效焦距f1与所述第二透镜的有效焦距f2满足0.5＜f1/f2＜1.5。
  39. 根据权利要求35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、所述第三透镜的像侧面的曲率半径R6与所述第四透镜的像侧面的曲率半径R8满足f/(R6+R8)＞-0.2。
  40. 根据权利要求35所述的摄像镜头，其特征在于，所述第一透镜的有效焦距f1、所述第二透镜的有效焦距f2、所述第四透镜的有效焦距f4与所述第五透镜的有效焦距f5满足1.5＜f1/f2+f4/f5＜2.5。
  41. 根据权利要求35所述的摄像镜头，其特征在于，所述第一透镜物侧面的曲率半径R1与所述第一透镜像侧面的曲率半径R2满足1＜(R1+R2)/(R1-R2)＜2。
  42. 根据权利要求35所述的摄像镜头，其特征在于，所述第五透镜的物侧面为凸面，其曲率半径R9与所述第五透镜的有效焦距f5满足0.3＜R9/f5＜1。
  43. 根据权利要求35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与所述第三透镜于所述光轴上的中心 厚度CT3满足0.5＜CT2/CT3＜1。
  44. 根据权利要求35所述的摄像镜头，其特征在于，所述第六透镜于所述光轴上的中心厚度CT6、所述第四透镜于所述光轴上的中心厚度CT4与所述第五透镜于所述光轴上的中心厚度CT5满足CT6/(CT4+CT5)＜0.2。
  45. 根据权利要求35所述的摄像镜头，其特征在于，满足(T45+T56)/(T12+T23)＜0.15，
    T45为所述第四透镜和所述第五透镜在所述光轴上的间隔距离，T56为所述第五透镜和所述第六透镜在所述光轴上的间隔距离，T12为所述第一透镜和所述第二透镜在所述光轴上的间隔距离，T23为所述第二透镜和所述第三透镜在所述光轴上的间隔距离。
  46. 根据权利要求35所述的摄像镜头，其特征在于，所述第二透镜的物侧面的最大有效半径DT21与所述第四透镜像侧面的最大有效半径DT42满足0.7＜DT21/DT42＜1.2。
  47. 根据权利要求35所述的摄像镜头，其特征在于，所述第四透镜的像侧面的最大有效半径DT42与所述第六透镜的物侧面的最大有效半径DT61满足0.8＜DT42/DT61＜1.3。
  48. 根据权利要求35至47中任一项所述的摄像镜头，其特征在于，所述第三透镜的像侧面的最大有效半径DT32与所述摄像镜头的成像面上有效像素区域对角线长的一半ImgH满足0.5＜DT32/ImgH＜1。
  49. 根据权利要求35至47中任一项所述的摄像镜头，其特征在于，所述摄像镜头的成像面上有效像素区域对角线长的一半ImgH与所述摄像镜头的总有效焦距f满足ImgH/f＞1.2。
PCT/CN2018/116307 2018-05-03 2018-11-20 摄像镜头 WO2019210676A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201810412795.5 2018-05-03
CN201810412795.5A CN108398767B (zh) 2018-05-03 2018-05-03 摄像镜头

Publications (1)

Publication Number Publication Date
WO2019210676A1 true WO2019210676A1 (zh) 2019-11-07

Family

ID=63101552

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2018/116307 WO2019210676A1 (zh) 2018-05-03 2018-11-20 摄像镜头

Country Status (2)

Country Link
CN (1) CN108398767B (zh)
WO (1) WO2019210676A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117389008A (zh) * 2023-12-11 2024-01-12 江西联创电子有限公司 光学镜头

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108398767B (zh) * 2018-05-03 2023-06-20 浙江舜宇光学有限公司 摄像镜头
CN109116522B (zh) * 2018-11-12 2024-04-23 浙江舜宇光学有限公司 摄像镜头
CN111796403B (zh) * 2019-04-08 2022-03-11 宁波舜宇车载光学技术有限公司 光学镜头及成像设备
CN113267872B (zh) * 2020-02-14 2024-03-08 宁波舜宇车载光学技术有限公司 光学镜头及电子设备

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8248715B2 (en) * 2008-12-10 2012-08-21 Fujifilm Corporation Imaging lens and imaging apparatus using imaging lens
CN204215090U (zh) * 2014-11-25 2015-03-18 浙江舜宇光学有限公司 一种高像素摄像镜头
CN107132643A (zh) * 2016-02-26 2017-09-05 亚太精密工业(深圳)有限公司 广角镜头
CN107577034A (zh) * 2017-10-25 2018-01-12 浙江舜宇光学有限公司 摄像镜头
CN108398767A (zh) * 2018-05-03 2018-08-14 浙江舜宇光学有限公司 摄像镜头
CN208399789U (zh) * 2018-05-03 2019-01-18 浙江舜宇光学有限公司 摄像镜头

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI485464B (zh) * 2010-12-30 2015-05-21 Largan Precision Co Ltd 成像用光學鏡片組
JP2017223755A (ja) * 2016-06-14 2017-12-21 キヤノン株式会社 撮像光学系
CN107436475A (zh) * 2017-06-12 2017-12-05 玉晶光电(厦门)有限公司 光学成像镜头

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8248715B2 (en) * 2008-12-10 2012-08-21 Fujifilm Corporation Imaging lens and imaging apparatus using imaging lens
CN204215090U (zh) * 2014-11-25 2015-03-18 浙江舜宇光学有限公司 一种高像素摄像镜头
CN107132643A (zh) * 2016-02-26 2017-09-05 亚太精密工业(深圳)有限公司 广角镜头
CN107577034A (zh) * 2017-10-25 2018-01-12 浙江舜宇光学有限公司 摄像镜头
CN108398767A (zh) * 2018-05-03 2018-08-14 浙江舜宇光学有限公司 摄像镜头
CN208399789U (zh) * 2018-05-03 2019-01-18 浙江舜宇光学有限公司 摄像镜头

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117389008A (zh) * 2023-12-11 2024-01-12 江西联创电子有限公司 光学镜头
CN117389008B (zh) * 2023-12-11 2024-04-26 江西联创电子有限公司 光学镜头

Also Published As

Publication number Publication date
CN108398767B (zh) 2023-06-20
CN108398767A (zh) 2018-08-14

Similar Documents

Publication Publication Date Title
WO2020093725A1 (zh) 摄像光学系统
WO2019169853A1 (zh) 光学成像镜头
WO2020001066A1 (zh) 摄像镜头
WO2019192180A1 (zh) 光学成像镜头
WO2019210739A1 (zh) 光学成像镜头
WO2019210672A1 (zh) 光学成像系统
WO2019233040A1 (zh) 摄像透镜组
WO2019210676A1 (zh) 摄像镜头
WO2020073703A1 (zh) 光学透镜组
WO2020007081A1 (zh) 光学成像镜头
WO2018103250A1 (zh) 摄像镜头及摄像装置
WO2020107936A1 (zh) 光学成像系统
WO2020186759A1 (zh) 光学成像镜头
WO2020151251A1 (zh) 光学透镜组
WO2019052220A1 (zh) 光学成像镜头
WO2019056817A1 (zh) 光学成像系统
WO2019052144A1 (zh) 光学成像镜头
WO2019237776A1 (zh) 光学成像系统
WO2021008232A1 (zh) 光学成像镜头
WO2019218628A1 (zh) 光学成像镜头
WO2020098328A1 (zh) 摄像镜头
WO2019233159A1 (zh) 光学成像镜头
WO2018209890A1 (zh) 成像镜头
WO2018218889A1 (zh) 光学成像系统
WO2019000986A1 (zh) 光学成像系统

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18917050

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 18917050

Country of ref document: EP

Kind code of ref document: A1