WO2023005766A1 - 摄像镜头、摄像模组及电子设备 - Google Patents

摄像镜头、摄像模组及电子设备 Download PDF

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Publication number
WO2023005766A1
WO2023005766A1 PCT/CN2022/106809 CN2022106809W WO2023005766A1 WO 2023005766 A1 WO2023005766 A1 WO 2023005766A1 CN 2022106809 W CN2022106809 W CN 2022106809W WO 2023005766 A1 WO2023005766 A1 WO 2023005766A1
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Prior art keywords
lens
lenses
group
camera lens
imaging lens
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PCT/CN2022/106809
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English (en)
French (fr)
Inventor
张凯元
徐运强
贾远林
周少攀
金闻嘉
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华为技术有限公司
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Priority to EP22848371.5A priority Critical patent/EP4357831A1/en
Publication of WO2023005766A1 publication Critical patent/WO2023005766A1/zh

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
    • G02B7/10—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification by relative axial movement of several lenses, e.g. of varifocal objective lens
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B30/00—Camera modules comprising integrated lens units and imaging units, specially adapted for being embedded in other devices, e.g. mobile phones or vehicles
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/50—Constructional details
    • H04N23/55—Optical parts specially adapted for electronic image sensors; Mounting thereof

Definitions

  • the present application relates to the field of photography, and in particular to a camera lens, a camera module including the camera lens, and electronic equipment including the camera module.
  • a mobile phone includes a main camera lens and a front lens.
  • the main camera lens is the most commonly used lens in mobile phones.
  • the lens that is turned on by default is the main camera lens. Therefore, there are certain requirements for the imaging quality of the main camera lens in each scene.
  • high requirements for imaging quality when the focusing distance is infinity there are also corresponding requirements for imaging quality when the focusing distance is macro. requirements. Therefore, in order to ensure high imaging quality when the focusing distance is infinity without increasing the surface process complexity and manufacturing difficulty of the main camera lens, improve the imaging quality when the focusing distance is macro Quality has become one of the main issues that the main camera needs to face.
  • image plane focusing In order to solve the above problems, most of the main camera lenses of existing mobile phones use image plane focusing to compensate for the amount of defocus that occurs when the focus distance changes.
  • image plane focusing There are two ways to implement image plane focusing.
  • the first image plane focusing method all the lenses of the main camera lens are integrated into a lens unit, and the optical sensor and filter are integrated into a relatively fixed sensing unit.
  • the focus motor of the main camera lens controls the relative movement of the lens unit along the optical axis with respect to the sensing unit, so as to achieve image plane focusing.
  • This image plane focusing method is the focusing method realized by most of the main camera lenses.
  • the second image plane focusing method all the lenses of the main camera lens are integrated into a fixed lens unit, and the optical sensor and filter are integrated into a sensing unit.
  • the focusing motor of the main camera lens drives the sensing unit to move relative to the lens unit along the optical axis, so as to achieve image plane focusing.
  • the image plane focusing achieved by the above two methods has the problem that it cannot effectively compensate for the astigmatism generated when the focusing distance changes. Reduced quality.
  • some mobile phones use a separate macro lens for shooting scenes where the focus distance is macro, but such macro lenses generally do not have the ability to take pictures when the focus distance is infinity .
  • an additional lens will be required for the mobile phone, which will occupy the space of the mobile phone and increase the cost.
  • an object of the present application is to provide a camera lens that can guarantee The main camera lens has higher imaging quality when the focusing distance is infinity, and at the same time improves the imaging quality when the focusing distance is macro.
  • the imaging resolution effect is significantly improved when the focusing distance is macro.
  • Another object of the present application is to provide a camera module including the camera lens and an electronic device including the camera module. The camera module and the electronic device have the same effect.
  • the present application provides a camera lens as follows.
  • the camera lens includes a first group of lenses and a second group of lenses arranged sequentially along the optical axis direction from the object side toward the image side, and the first group of lenses can Moving along the direction of the optical axis, the second group of lenses is fixed; during the process of switching the focusing distance of the camera lens from infinity to the minimum macro distance, the first group of lenses moves along the direction of the optical axis to the The object side moves, and the moving stroke ⁇ of the first group of lenses and the total optical length TTL of the camera lens satisfy ⁇ /TTL ⁇ 0.2; the total optical length TTL of the camera lens and the maximum half-image height of the camera lens IMH satisfies 0.5 ⁇ TTL/IMH ⁇ 2.
  • the burden on the focusing motor for focusing can be reduced under the premise of ensuring the angle of view and image quality; and by defining the imaging lens of the application
  • the value of TTL/IMH of the optical system is limited to ensure that the camera lens of the present application has better image quality, and it can be used as the main camera lens.
  • the camera lens has N lenses, the first group of lenses includes N1 lenses, and the second group of lenses includes N2 lenses, satisfying 7 ⁇ N ⁇ 10, 4 ⁇ N1 ⁇ 7 and 1 ⁇ N2 ⁇ 4.
  • the optical system of the imaging lens of the present application can be used for example When using electronic equipment such as mobile phones, the thickness of the electronic equipment will not be too large.
  • the effective focal length EFL of the imaging lens and the maximum half-image height IMH of the imaging lens satisfy 1 ⁇ EFL/IMH ⁇ 2. .
  • the imaging lens of the present application has better image quality and can be used as a main imaging lens.
  • the first group of lenses has positive refractive power
  • the effective focal length EFL1 of the first group of lenses and the effective focal length EFL of the imaging lens satisfy 0.5 ⁇ EFL1/EFL ⁇ 2.
  • the optical power of the entire optical system can be effectively distributed, which is beneficial to constructing the optical system of the imaging lens.
  • the first lens on the most object side in the first group of lenses has a positive refractive power
  • the first group of lenses further includes The adjacent second lens, the part of the near optical axis of the object side surface of the second lens is convex toward the object side, and the part of the near optical axis of the image side surface of the second lens is concave toward the object side.
  • a part of the near optical axis of the object-side surface of one of the two lenses closest to the image side in the first group of lenses protrudes toward the object side.
  • the F number F# of the imaging lens satisfies F# ⁇ 3.5.
  • the imaging performance of the imaging lens of the present application is guaranteed.
  • the maximum value D1 of the maximum effective diameters of the lenses in the first group of lenses and the minimum value of the maximum effective diameters of the lenses in the second group of lenses are D2 satisfies 1 ⁇ D2/D1 ⁇ 3.
  • the D2/D1 of the optical system of the imaging lens of the present application it is beneficial to construct the optical system of the imaging lens, making the optical system of the imaging lens easy to process.
  • the lens of the camera lens is made of optical plastic or optical glass.
  • the optical system of the imaging lens can be constructed with cost-effective materials.
  • the present application provides a camera module as follows, including a photosensitive element and the camera lens described in any one of the above technical solutions, the photosensitive element is located on the image side of the camera lens, wherein, The camera lens is used for receiving the light reflected by the object to be photographed and projecting it to the photosensitive element, and the photosensitive element is used for converting the light into an image signal.
  • the camera module including the camera lens according to the present application can exert the same beneficial effects as those of the camera lens.
  • the present application provides the following electronic equipment, comprising a casing and the camera module described in the above technical solution, the camera module being installed on the casing.
  • an electronic device including the camera module according to the present application can exert the same beneficial effects as the above camera module.
  • FIG. 1A is a schematic diagram showing an optical system of an imaging lens according to a first embodiment of the present application.
  • FIG. 1B is a spherical aberration diagram showing the optical system of the imaging lens in FIG. 1A .
  • FIG. 1C is an astigmatism diagram showing the optical system of the imaging lens in FIG. 1A .
  • FIG. 1D is a diagram showing distortion of the optical system of the imaging lens in FIG. 1A .
  • FIG. 2A is a schematic diagram showing an optical system of an imaging lens according to a second embodiment of the present application.
  • FIG. 2B is a spherical aberration diagram showing the optical system of the imaging lens in FIG. 2A .
  • FIG. 2C is an astigmatism diagram showing the optical system of the imaging lens in FIG. 2A .
  • FIG. 2D is a diagram showing distortion of the optical system of the imaging lens in FIG. 2A.
  • FIG. 3A is a schematic diagram showing an optical system of an imaging lens according to a third embodiment of the present application.
  • FIG. 3B is a spherical aberration diagram showing the optical system of the imaging lens in FIG. 3A .
  • FIG. 3C is an astigmatism diagram showing the optical system of the imaging lens in FIG. 3A .
  • FIG. 3D is a diagram showing distortion of the optical system of the imaging lens in FIG. 3A.
  • FIG. 4A is a schematic diagram showing an optical system of an imaging lens according to a fourth embodiment of the present application.
  • FIG. 4B is a spherical aberration diagram showing the optical system of the imaging lens in FIG. 4A .
  • FIG. 4C is an astigmatism diagram showing the optical system of the imaging lens in FIG. 4A .
  • FIG. 4D is a diagram showing distortion of the optical system of the imaging lens in FIG. 4A.
  • 5A is a schematic diagram showing an optical system of an imaging lens according to a fifth embodiment of the present application.
  • FIG. 5B is a spherical aberration diagram showing the optical system of the imaging lens in FIG. 5A .
  • FIG. 5C is an astigmatism diagram showing the optical system of the imaging lens in FIG. 5A .
  • FIG. 5D is a diagram showing distortion of the optical system of the imaging lens in FIG. 5A.
  • 6A is a schematic diagram showing an optical system of an imaging lens according to a sixth embodiment of the present application.
  • FIG. 6B is a spherical aberration diagram showing the optical system of the imaging lens in FIG. 6A .
  • FIG. 6C is an astigmatism diagram showing the optical system of the imaging lens in FIG. 6A .
  • FIG. 6D is a diagram showing distortion of the optical system of the imaging lens in FIG. 6A.
  • axial refers to the direction along the optical axis of the lens
  • object side refers to the side where the subject is based on the camera lens
  • image side refers to the side where the image formed by the subject through the lens is based on the camera lens (it can also be said to be the side where the image plane is located).
  • the “F number” of the camera lens is the relative value obtained from the ratio of the focal length of the camera lens to the diameter of the lens through the lens, expressed in "F#". The smaller the F number, the more light entering through the aperture in the same unit time; the larger the F number, the less the light entering through the aperture in the same unit time.
  • the "effective focal length" of the camera lens is the distance from the principal point of the camera lens to the focal point on the optical axis, expressed in “EFL”;
  • the "effective focal length” of the first group of lenses is from the principal point of the first group of lenses to the focal point at The distance on the optical axis is represented by “EFL1”;
  • the "effective focal length” of the second group of lenses is the distance from the principal point of the second group of lenses to the focal point on the optical axis, represented by "EFL2".
  • the “total optical length" of the camera lens is the distance on the optical axis from the object-side surface of the most object-side lens of the camera lens to the image plane, expressed in "TTL".
  • the “maximum half-image height" of the camera lens is the maximum radius of the imaging circle on the image plane, expressed in "IMH".
  • “Positive optical power” means that a lens or lens group has a positive focal length, so that the lens or lens group can play the role of converging light.
  • Negative optical power means that a lens or lens group has a negative focal length, enabling the lens or lens group to perform the function of diverging light.
  • the "object plane” is the plane on which the object being imaged lies.
  • the "image plane” is the plane where the image of the imaged object is located.
  • Object side is the side of the lens close to the object plane.
  • Image side is the side of the camera lens close to the image plane.
  • the "focus distance" of a camera lens is the distance from the object plane to the image plane on the optical axis.
  • the focus distance is infinity, which refers to the distance from the object plane to the image plane on the optical axis when the camera lens achieves focus when the object distance is infinite.
  • the focus distance is the minimum macro distance. The distance from the object plane to the image plane on the optical axis when focusing.
  • the camera lens provided by the embodiment of this application is mainly used in the camera module of a mobile terminal, and the mobile terminal can be a mobile phone or a tablet computer. , notebook computers, monitors, portable terminal equipment such as vehicles, etc.
  • the camera lens can be used to shoot and record images, and its shooting scenes include various complex and diverse shooting application scenes, such as indoor, outdoor, people, environment and other different scenes.
  • the camera lens of the camera module is installed in the housing of the mobile phone, and the photosensitive element is fixed in the housing.
  • the embodiment of the present application provides a camera lens capable of zooming as follows.
  • the camera lens includes a first group of lenses and a second group of lenses arranged sequentially along the optical axis direction from the object side toward the image side, the first group of lenses can move along the optical axis direction, and the second group of lenses is fixed.
  • the focus distance of the camera lens is switched from infinity to the minimum macro distance, the first group of lenses moves toward the object side along the optical axis.
  • the moving stroke ⁇ of the first group of lenses and the total optical length TTL of the camera lens satisfy ⁇ /TTL ⁇ 0.2.
  • the total optical length TTL of the camera lens and the maximum half-image height IMH of the camera lens satisfy 0.5 ⁇ TTL/IMH ⁇ 2.
  • the camera lens has N lenses, the first group of lenses includes N1 lenses, and the second group of lenses includes N2 lenses, satisfying 7 ⁇ N ⁇ 10, 4 ⁇ N1 ⁇ 7 and 1 ⁇ N2 ⁇ 4.
  • the effective focal length EFL of the camera lens and the maximum half-image height IMH of the camera lens satisfy 1 ⁇ EFL/IMH ⁇ 2.
  • the first group of lenses has positive refractive power, and the effective focal length EFL1 of the first group of lenses and the effective focal length EFL of the camera lens satisfy 0.5 ⁇ EFL1/EFL ⁇ 2.
  • the first lens on the most object side in the first group of lenses has a positive refractive power
  • the first group of lenses also includes a second lens adjacent to the first lens
  • the near optical axis of the object side surface of the second lens is A portion of the second lens is convex toward the object side, and a portion near the optical axis of the image-side surface of the second lens is concave toward the object side.
  • a part of the near optical axis of the object-side surface of one of the two lenses closest to the image side in the first group of lenses protrudes toward the object side.
  • the F number F# of the camera lens satisfies F# ⁇ 3.5.
  • the maximum value D1 of the maximum effective diameters of the lenses in the first group of lenses and the minimum value D2 of the maximum effective diameters of the lenses in the second group of lenses satisfy 1 ⁇ D2/D1 ⁇ 3.
  • the lens of the camera lens is made of optical plastic or optical glass.
  • the present application also provides a camera module as follows, the camera module includes a photosensitive element and a camera lens adopting the above solution, and the photosensitive element is located on the image side of the camera lens. The camera lens is used to receive the light reflected by the object to be photographed and project it to the photosensitive element, and the photosensitive element is used to convert the light into an image signal.
  • the present application also provides an electronic device as follows, the electronic device includes a casing and the above-mentioned camera module, and the camera module is installed in the casing.
  • the imaging lens according to the first embodiment of the present application includes a total of 7 lenses, a filter L and an image plane P.
  • All lenses can be made of optical plastics, and these lenses are the first lens 1, the second lens 2, the third lens 3, the fourth lens 4, the fifth lens 5, and the sixth lens arranged in sequence from the object side toward the image side 6 and the seventh lens 7 .
  • the first lens 1, the second lens 2, the third lens 3, the fourth lens 4 and the fifth lens 5 are divided into a first group lens G1, and the sixth lens 6 and the seventh lens 7 are divided into a second group lens G2 .
  • the first group lens G1 can move relative to the image plane P of the imaging lens, and the second group lens G2 is fixed relative to the image plane P.
  • the first group of lenses G1 is moved along the optical axis O relative to the image plane P (moving toward the object side), the second group lens G2 remains fixed relative to the image plane P.
  • the effective focal length EFL of the camera lens is 6.04mm
  • the total optical length TTL of the camera lens is related to the maximum half image height IMH
  • the ratio TTL/IMH 1.51
  • the refractive power of the first group of lenses G1 is positive
  • the refractive power of the second group of lenses G2 is negative
  • the effective focal length EFL1 of the first group of lenses G1 5.65mm
  • the power of the first lens 1 is positive
  • the power of the second lens 2 is negative
  • the power of the third lens 3 is negative
  • the power of the fourth lens 4 is positive
  • the power of the fifth lens 4 is positive.
  • the refractive power of the lens 5 is positive, the refractive power of the sixth lens 6 is negative, and the refractive power of the seventh lens 7 is negative.
  • a portion (central portion) of the object-side surface of the second lens 2 near the optical axis O is convex toward the object side, and a portion (central portion) of the image-side surface of the second lens 2 near the optical axis O is recessed toward the object side.
  • the portion (central portion) of the object-side surface of the most image-side lens (ie, the fifth lens 5 ) in the first group of lenses G1 protrudes toward the object side near the optical axis O.
  • D2/D1 1.79.
  • the basic surface type parameters of the optical system of the imaging lens according to the first embodiment of the present application are recorded in the following Table 1A.
  • Table 1A "surface number” is the corresponding surface of each optical component in the optical system; “surface type” indicates the shape of the surface, where Sphere indicates a spherical surface, and Asphere is an aspherical surface.
  • the shape parameters of the surface are calculated by the following formula 1; "R” represents the radius of curvature of the surface; “Th” represents the inter-plane axial thickness of optical components (such as lenses); “Nd” represents the refractive index of the material; “Vd” represents Material Abbe number; “SA” means radial radius.
  • the corresponding inf in each parameter means infinity.
  • the aspheric coefficients of each lens are recorded in the following Table 1B, and the data in Table 1B are higher-order coefficients of the aspheric surface whose surface type is Asphere in Table 1A.
  • the surface numbers of the aspheric surfaces in Table 1B correspond to the surface numbers in Table 1A. This formula can be used to determine the shape of an aspheric surface. Without these higher order coefficients, the aspheric surface type cannot be determined. All aspheric surface types can be defined using the following aspheric formula:
  • z is the sagittal height of the aspheric surface
  • r is the radial coordinate of the aspheric surface
  • c is the curvature of the vertex of the aspheric surface
  • K is the constant of the quadric surface
  • A4, A6, A8,..., A30 are the coefficients of the aspheric surface.
  • the optical system of the imaging lens according to the first embodiment of the present application can be obtained.
  • Spherical aberration diagrams, astigmatism diagrams and distortion diagrams of the optical system are shown in FIGS. 1B to 1D .
  • the curves in the spherical chromatic aberration diagram represent the values of the vertical axis spherical aberration of light of different wavelengths (the central wavelength is 650nm, 610nm, 555nm, 510nm, 470nm) passing through the optical system, which represents the value of the light after passing through the optical imaging system The focus will be off.
  • the central wavelength is 650nm, 610nm, 555nm, 510nm, 470nm
  • the abscissa is the offset (in mm), and the ordinate is the normalized value, and multiple curves basically overlap together.
  • the solid line in the astigmatism diagram represents the degree of bending of light at the central wavelength (555nm) on the meridional image plane, and the dotted line represents the degree of bending of light at the central wavelength (555nm) on the sagittal image plane.
  • the abscissa is the degree of curvature (in mm), and the ordinate is the field of view (in degrees).
  • the solid line in the distortion diagram represents the distortion value of light with a central wavelength (555 nm) passing through the optical system, which represents the magnitude of distortion under different viewing fields.
  • the abscissa is the distortion value, and the value of the distortion value is a percentage, and the ordinate is the field of view (in degrees).
  • the aberrations of the optical system of the present application can be explained through these drawings, which can show that the optical performance of the imaging lens of the present application is better.
  • Each of the following embodiments has similar drawings, and these drawings have similar functions, so repeated description will not be repeated in the following embodiments.
  • the imaging lens according to the second embodiment of the present application includes a total of 10 lenses, a filter L and an image plane P.
  • All lenses can be made of optical plastics, and these lenses are the first lens 1, the second lens 2, the third lens 3, the fourth lens 4, the fifth lens 5, and the sixth lens arranged in sequence from the object side toward the image side 6.
  • the seventh lens 7 , the eighth lens 8 , the ninth lens 9 and the tenth lens 10 .
  • the first lens 1, the second lens 2, the third lens 3, the fourth lens 4, the fifth lens 5 and the sixth lens 6 are divided into the first group lens G1, the seventh lens 7, the eighth lens 8, the ninth lens
  • the lens 9 and the tenth lens 10 are divided into a second group lens G2.
  • the first group lens G1 can move relative to the image plane P of the imaging lens, and the second group lens G2 is fixed relative to the image plane P. In this way, when the camera lens achieves focusing when the focusing distance is infinity and switches to achieving focusing when the focusing distance is the minimum macro distance, the first group of lenses G1 is moved along the optical axis O relative to the image plane P (moving toward the object side), the second group lens G2 remains fixed relative to the image plane P.
  • the first group of lenses G1 relative to the image plane P Axially moved distance that is, focus stroke
  • ⁇ 0.30mm
  • the ratio of this focus stroke to the total optical length TTL of the camera lens when the camera lens is in focus when the focus distance is infinite
  • ⁇ /TTL 0.041.
  • the total optical length TTL of the camera lens is related to the maximum half-image height IMH
  • the ratio TTL/IMH 1.77.
  • the refractive power of the first group of lenses G1 is positive
  • the refractive power of the second group of lenses G2 is negative
  • the effective focal length EFL1 of the first group of lenses G1 5.69mm
  • the power of the first lens 1 is positive
  • the power of the second lens 2 is negative
  • the power of the third lens 3 is negative
  • the power of the fourth lens 4 is positive
  • the power of the fifth lens 4 is positive.
  • the power of the lens 5 is negative
  • the power of the sixth lens 6 is negative
  • the power of the seventh lens 7 is positive
  • the power of the eighth lens 8 is positive
  • the power of the ninth lens 9 is positive.
  • the refractive power of the tenth lens 10 is negative
  • a portion (central portion) of the object-side surface of the second lens 2 near the optical axis O is convex toward the object side
  • a portion (central portion) of the image-side surface of the second lens 2 near the optical axis O is recessed toward the object side.
  • the part (central part) of the object-side surface of the most image-side lens (that is, the sixth lens 6 ) in the first group of lenses G1 near the optical axis O protrudes toward the object side.
  • D2/D1 1.16.
  • the basic surface type parameters of the optical system of the imaging lens according to the second embodiment of the present application are recorded in the following Table 2A.
  • surface number is the corresponding surface of each optical component in the optical system;
  • surface type indicates the shape of the surface, where Sphere indicates a spherical surface, and Asphere is an aspheric surface.
  • Asphere is an aspheric surface.
  • the shape parameters of the surface are calculated by the following formula 1; "R” represents the radius of curvature of the surface; “Th” represents the inter-plane axial thickness of optical components (such as lenses); “Nd” represents the refractive index of the material; “Vd” represents Material Abbe number; "SA” means radial radius; “Conic” means conic coefficient.
  • the corresponding inf in each parameter means infinity.
  • the aspheric coefficients of each lens are recorded in the following Table 2B, and the data in Table 2B are higher-order coefficients of the aspheric surface whose surface type is Asphere in Table 2A.
  • the surface numbers of the aspheric surfaces in Table 2B correspond to the surface numbers in Table 2A. This formula can be used to determine the shape of an aspheric surface. Without these higher order coefficients, the aspheric surface type cannot be determined. All aspheric surface types can be defined using the following aspheric formula:
  • z is the sagittal height of the aspheric surface
  • r is the radial coordinate of the aspheric surface
  • c is the curvature of the vertex of the aspheric surface
  • K is the constant of the quadric surface
  • A4, A6, A8,..., A30 are the coefficients of the aspheric surface.
  • the optical system of the imaging lens according to the second embodiment of the present application can be obtained.
  • Spherical aberration diagrams, astigmatism diagrams and distortion diagrams of the optical system are shown in FIGS. 2B to 2D .
  • the curves in the spherical aberration diagram represent the values of the vertical axis spherical aberration of light of different wavelengths (the central wavelength is 650nm, 610nm, 555nm, 510nm, 470nm) passing through the optical system, which represents the light after passing through the optical imaging system The focus will be off.
  • the central wavelength is 650nm, 610nm, 555nm, 510nm, 470nm
  • the abscissa is the offset (in mm), and the ordinate is the normalized value, and the multiple curves basically overlap together.
  • the solid line in the astigmatism diagram represents the degree of bending of light at the central wavelength (555nm) on the meridional image plane, and the dotted line represents the degree of bending of light at the central wavelength (555nm) on the sagittal image plane.
  • the abscissa is the degree of curvature (in mm), and the ordinate is the field of view (in degrees). As shown in FIG.
  • the solid line in the distortion diagram represents the distortion value of light with a central wavelength (555nm) passing through the optical system, and the value of the distortion value is a percentage, which represents the magnitude of distortion under different field of view conditions.
  • the abscissa is the distortion value, and the ordinate is the field of view (in degrees).
  • the imaging lens according to the third embodiment of the present application includes a total of 7 lenses, a filter L and an image plane P.
  • All lenses can be made of optical plastics, and these lenses are the first lens 1, the second lens 2, the third lens 3, the fourth lens 4, the fifth lens 5, and the sixth lens arranged in sequence from the object side toward the image side 6 and the seventh lens 7 .
  • the first lens 1, the second lens 2, the third lens 3, the fourth lens 4, the fifth lens 5 and the sixth lens 6 are divided into a first group lens G1, and the seventh lens 7 is divided into a second group lens G2 .
  • the first group lens G1 can move relative to the image plane P of the imaging lens, and the second group lens G2 is fixed relative to the image plane P.
  • the first group of lenses G1 is moved along the optical axis O relative to the image plane P (moving toward the object side), the second group lens G2 remains fixed relative to the image plane P.
  • the first group of lenses G1 relative to the image plane P Axially moved distance that is, focus travel
  • ⁇ 0.29mm
  • the ratio of this focus travel to the total optical length TTL of the camera lens when the camera lens is in focus when the focus distance is infinite
  • ⁇ /TTL 0.044.
  • the total optical length TTL of the camera lens is related to the maximum half image height IMH
  • the ratio TTL/IMH 1.73.
  • the refractive power of the first group of lenses G1 is positive
  • the refractive power of the second group of lenses G2 is positive
  • the effective focal length EFL1 of the first group of lenses G1 5.77mm
  • the power of the first lens 1 is positive
  • the power of the second lens 2 is negative
  • the power of the third lens 3 is positive
  • the power of the fourth lens 4 is positive
  • the power of the fifth lens 4 is positive.
  • the refractive power of the lens 5 is negative, the refractive power of the sixth lens 6 is positive, and the refractive power of the seventh lens 7 is positive.
  • a portion (central portion) of the object-side surface of the second lens 2 near the optical axis O is convex toward the object side, and a portion (central portion) of the image-side surface of the second lens 2 near the optical axis O is recessed toward the object side.
  • the part (central part) of the object-side surface of the most image-side lens (that is, the sixth lens 6 ) in the first group of lenses G1 near the optical axis O protrudes toward the object side. .
  • D2/D1 1.43.
  • the basic surface type parameters of the optical system of the imaging lens according to the third embodiment of the present application are recorded in the following Table 3A.
  • surface number is the corresponding surface of each optical component in the optical system;
  • surface type indicates the shape of the surface, where Sphere indicates a spherical surface, and Asphere is an aspheric surface.
  • Asphere is an aspheric surface.
  • the shape parameters of the surface are calculated by the following formula 1; "R” represents the radius of curvature of the surface; “Th” represents the inter-plane axial thickness of optical components (such as lenses); “Nd” represents the refractive index of the material; “Vd” represents Material Abbe number; "SA” means radial radius; “Conic” means conic coefficient.
  • the corresponding inf in each parameter means infinity.
  • the aspheric coefficients of each lens are recorded in the following Table 3B, and the data in Table 3B are higher-order coefficients of the aspheric surface whose surface type is Asphere in Table 3A.
  • the surface numbers of the aspheric surfaces in Table 3B correspond to the surface numbers in Table 3A. This formula can be used to determine the shape of an aspheric surface. Without these higher order coefficients, the aspheric surface type cannot be determined. All aspheric surface types can be defined using the following aspheric formula:
  • z is the sagittal height of the aspheric surface
  • r is the radial coordinate of the aspheric surface
  • c is the curvature of the vertex of the aspheric surface
  • K is the constant of the quadric surface
  • A4, A6, A8,..., A30 are the coefficients of the aspheric surface.
  • the optical system of the imaging lens according to the third embodiment of the present application can be obtained.
  • Spherical aberration diagrams, astigmatism diagrams and distortion diagrams of the optical system are shown in FIGS. 3B to 3D .
  • the curves in the spherical aberration diagram represent the values of the vertical axis spherical aberration of light of different wavelengths (the central wavelength is 650nm, 610nm, 555nm, 510nm, 470nm) passing through the optical system, which represents the value of the light after passing through the optical imaging system The focus will be off.
  • the abscissa is the offset (in mm), and the ordinate is the normalized value.
  • the solid line in the astigmatism diagram represents the degree of bending of light at the central wavelength (555 nm) on the meridional image plane, and the dotted line represents the degree of bending of light at the central wavelength (555 nm) on the sagittal image plane.
  • the abscissa is the degree of curvature (in mm), and the ordinate is the field of view (in degrees).
  • the solid line in the distortion diagram represents the distortion value of light with a central wavelength (555 nm) passing through the optical system, and the value of the distortion value is a percentage, which represents the magnitude of distortion under different field of view conditions.
  • the abscissa is the distortion value, and the ordinate is the field of view (in degrees).
  • the imaging lens according to the fourth embodiment of the present application includes a total of 8 lenses, a filter L and an image plane P.
  • All lenses can be made of optical plastics, and these lenses are the first lens 1, the second lens 2, the third lens 3, the fourth lens 4, the fifth lens 5, and the sixth lens arranged in sequence from the object side toward the image side 6.
  • the seventh lens 7 and the eighth lens 8 .
  • the first lens 1, the second lens 2, the third lens 3, the fourth lens 4, the fifth lens 5, the sixth lens 6 and the seventh lens 7 are divided into the first group lens G1, and the eighth lens 8 is divided into The second group of lenses G2.
  • the first group lens G1 can move relative to the image plane P of the imaging lens, and the second group lens G2 is fixed relative to the image plane P. In this way, when the camera lens achieves focusing when the focusing distance is infinity and switches to achieving focusing when the focusing distance is the minimum macro distance, the first group of lenses G1 is moved along the optical axis O relative to the image plane P (moving toward the object side), the second group lens G2 remains fixed relative to the image plane P.
  • the first group of lenses G1 relative to the image plane P Axially moved distance that is, focus travel
  • ⁇ 0.26mm
  • the ratio of the focus travel to the total optical length TTL of the camera lens when the camera lens is in focus when the focus distance is infinite
  • ⁇ /TTL 0.04.
  • the total optical length TTL of the camera lens is related to the maximum half image height IMH
  • the ratio TTL/IMH 1.77.
  • the refractive power of the first group of lenses G1 is positive
  • the refractive power of the second group of lenses G2 is positive
  • the effective focal length EFL1 of the first group of lenses G1 4.70mm
  • the power of the first lens 1 is positive
  • the power of the second lens 2 is negative
  • the power of the third lens 3 is positive
  • the power of the fourth lens 4 is positive
  • the power of the fifth lens 4 is positive.
  • the refractive power of the lens 5 is negative, the refractive power of the sixth lens 6 is positive, the refractive power of the seventh lens 7 is negative, and the refractive power of the eighth lens 8 is positive.
  • a portion (central portion) of the object-side surface of the second lens 2 near the optical axis O is convex toward the object side, and a portion (central portion) of the image-side surface of the second lens 2 near the optical axis O is recessed toward the object side.
  • the portion (central portion) of the object-side surface of the most image-side lens (ie, the seventh lens 7 ) in the first group of lenses G1 protrudes toward the object side near the optical axis O.
  • D2/D1 1.58.
  • the basic surface type parameters of the optical system of the imaging lens according to the fourth embodiment of the present application are recorded in the following Table 4A.
  • surface number is the corresponding surface of each optical component in the optical system;
  • surface type indicates the shape of the surface, where Sphere indicates a spherical surface, and Asphere is an aspheric surface.
  • Asphere is an aspheric surface.
  • the shape parameters of the surface are calculated by the following formula 1; "R” represents the radius of curvature of the surface; “Th” represents the inter-plane axial thickness of optical components (such as lenses); “Nd” represents the refractive index of the material; “Vd” represents Material Abbe number; "SA” means radial radius; “Conic” means conic coefficient.
  • the corresponding inf in each parameter means infinity.
  • the aspheric coefficients of each lens are recorded in the following Table 4B, and the data in Table 4B are higher-order coefficients of the aspheric surface whose surface type is Asphere in Table 4A.
  • the surface numbers of the aspheric surfaces in Table 4B correspond to the surface numbers in Table 4A. This formula can be used to determine the shape of an aspheric surface. Without these higher order coefficients, the aspheric surface type cannot be determined. All aspheric surface types can be defined using the following aspheric formula:
  • z is the sagittal height of the aspheric surface
  • r is the radial coordinate of the aspheric surface
  • c is the curvature of the vertex of the aspheric surface
  • K is the constant of the quadric surface
  • A4, A6, A8,..., A30 are the coefficients of the aspheric surface.
  • the optical system of the imaging lens according to the fourth embodiment of the present application can be obtained.
  • Spherical aberration diagrams, astigmatism diagrams and distortion diagrams of the optical system are shown in FIGS. 4B to 4D .
  • the curves in the spherical aberration diagram represent the values of the vertical axis spherical aberration of light of different wavelengths (the center wavelength is 650nm, 610nm, 555nm, 510nm, 470nm) passing through the optical system, which represents the light after passing through the optical imaging system The focus will be off.
  • the center wavelength is 650nm, 610nm, 555nm, 510nm, 470nm
  • the abscissa is the offset (in mm), and the ordinate is the normalized value, and multiple curves are roughly overlapped together.
  • the solid line in the astigmatism diagram represents the degree of bending of light at the central wavelength (555 nm) on the meridional image plane, and the dotted line represents the degree of bending of light at the central wavelength (555 nm) on the sagittal image plane.
  • the abscissa is the degree of curvature (in mm), and the ordinate is the field of view (in degrees). As shown in FIG.
  • the solid line in the distortion diagram represents the distortion value of light with a central wavelength (555 nm) passing through the optical system, which represents the magnitude of distortion under different viewing fields.
  • the abscissa is the distortion value, and the value of the distortion value is a percentage, and the ordinate is the field of view (in degrees).
  • the imaging lens according to the fifth embodiment of the present application includes a total of 9 lenses, a filter L, and an image plane P.
  • All lenses can be made of optical plastics, and these lenses are the first lens 1, the second lens 2, the third lens 3, the fourth lens 4, the fifth lens 5, and the sixth lens arranged in sequence from the object side toward the image side 6.
  • the seventh lens 7 , the eighth lens 8 and the ninth lens 9 .
  • the first lens 1, the second lens 2, the third lens 3, the fourth lens 4 and the fifth lens 5 are divided into the first group lens G1, the sixth lens 6, the seventh lens 7, the eighth lens 8 and the ninth lens
  • the lens 9 is divided into a second group of lenses G2.
  • the first group lens G1 can move relative to the image plane P of the imaging lens, and the second group lens G2 is fixed relative to the image plane P. In this way, when the camera lens achieves focusing when the focusing distance is infinity and switches to achieving focusing when the focusing distance is the minimum macro distance, the first group of lenses G1 is moved along the optical axis O relative to the image plane P (moving toward the object side), the second group lens G2 remains fixed relative to the image plane P.
  • the effective focal length EFL of the camera lens is 5.30mm
  • the first group of lenses G1 relative to the image plane P Axially moved distance that is, focus stroke
  • ⁇ 0.24mm
  • the total optical length TTL of the camera lens is related to the maximum half image height IMH
  • the ratio TTL/IMH 1.72.
  • the refractive power of the first group of lenses G1 is positive
  • the refractive power of the second group of lenses G2 is negative
  • the effective focal length EFL1 of the first group of lenses G1 5.17mm
  • the power of the first lens 1 is positive
  • the power of the second lens 2 is negative
  • the power of the third lens 3 is negative
  • the power of the fourth lens 4 is positive
  • the power of the fifth lens 4 is positive.
  • the power of the lens 5 is positive, the power of the sixth lens 6 is positive, the power of the seventh lens 7 is negative, the power of the eighth lens 8 is negative, and the power of the ninth lens 9 is negative. is negative.
  • a portion (central portion) of the object-side surface of the second lens 2 near the optical axis O is convex toward the object side, and a portion (central portion) of the image-side surface of the second lens 2 near the optical axis O is recessed toward the object side.
  • the portion (central portion) of the object-side surface of the most image-side lens (ie, the fifth lens 5 ) in the first group of lenses G1 protrudes toward the object side near the optical axis O.
  • D2/D1 1.17.
  • the basic surface type parameters of the optical system of the imaging lens according to the fifth embodiment of the present application are recorded in the following Table 5A.
  • surface number is the corresponding surface of each optical component in the optical system;
  • surface type indicates the shape of the surface, where Sphere indicates a spherical surface, and Asphere is an aspherical surface.
  • Asphere is an aspherical surface.
  • the shape parameters of the surface are calculated by the following formula 1; "R” represents the radius of curvature of the surface; “Th” represents the inter-plane axial thickness of optical components (such as lenses); “Nd” represents the refractive index of the material; “Vd” represents Material Abbe number; "SA” means radial radius; “Conic” means conic coefficient.
  • the corresponding inf in each parameter means infinity.
  • the aspheric coefficients of each lens are recorded in the following Table 5B, and the data in Table 5B are higher-order coefficients of the aspheric surface whose surface type is Asphere in Table 5A.
  • the surface numbers of the aspheric surfaces in Table 5B correspond to the surface numbers in Table 5A. This formula can be used to determine the shape of an aspheric surface. Without these higher order coefficients, the aspheric surface type cannot be determined. All aspheric surface types can be defined using the following aspheric formula:
  • z is the sagittal height of the aspheric surface
  • r is the radial coordinate of the aspheric surface
  • c is the curvature of the vertex of the aspheric surface
  • K is the constant of the quadric surface
  • A4, A6, A8,..., A30 are the coefficients of the aspheric surface.
  • the optical system of the imaging lens according to the fifth embodiment of the present application can be obtained.
  • Spherical aberration diagrams, astigmatism diagrams and distortion diagrams of the optical system are shown in FIGS. 5B to 5D .
  • the curves in the spherical aberration diagram represent the values of the vertical axis spherical aberration of light of different wavelengths (the central wavelength is 650nm, 610nm, 555nm, 510nm, 470nm) passing through the optical system, which represents the value of the light after passing through the optical imaging system The focus will be off.
  • the abscissa is the offset (in mm), and the ordinate is the normalized value.
  • the solid line in the astigmatism diagram represents the degree of bending of light at the central wavelength (555nm) on the meridional image plane
  • the dotted line represents the degree of bending of light at the central wavelength (555nm) on the sagittal image plane.
  • the abscissa is the degree of curvature (in mm)
  • the ordinate is the field of view (in degrees).
  • the solid line in the distortion diagram represents the distortion value of light with a central wavelength (555 nm) passing through the optical system, which represents the magnitude of distortion under different viewing fields.
  • the abscissa is the distortion value, and the value of the distortion value is a percentage, and the ordinate is the field of view (in degrees).
  • the imaging lens according to the sixth embodiment of the present application includes seven lenses, a filter L and an image plane P in total. All lenses can be made of optical plastics, and these lenses are the first lens 1, the second lens 2, the third lens 3, the fourth lens 4, the fifth lens 5, and the sixth lens arranged in sequence from the object side toward the image side 6 and the seventh lens 7 .
  • the first lens 1, the second lens 2, the third lens 3 and the fourth lens 4 are divided into the first group lens G1
  • the fifth lens 5, the sixth lens 6 and the seventh lens 7 are divided into the second group lens G2 .
  • the first group lens G1 can move relative to the image plane P of the imaging lens
  • the second group lens G2 is fixed relative to the image plane P.
  • the first group of lenses G1 is moved along the optical axis O relative to the image plane P (moving toward the object side), the second group lens G2 remains fixed relative to the image plane P.
  • the F number F# of the camera lens 2.3
  • the effective focal length EFL of the camera lens is 4.44mm
  • the first group of lenses G1 relative to the image plane P Axially moved distance that is, focus stroke
  • ⁇ 0.15mm
  • the total optical length TTL of the camera lens is related to the maximum half image height IMH
  • the ratio TTL/IMH 1.42.
  • the refractive power of the first group of lenses G1 is positive
  • the refractive power of the second group of lenses G2 is negative
  • the effective focal length EFL1 of the first group of lenses G1 4.23mm
  • the power of the first lens 1 is positive
  • the power of the second lens 2 is negative
  • the power of the third lens 3 is positive
  • the power of the fourth lens 4 is positive
  • the power of the fifth lens 4 is positive.
  • the refractive power of the lens 5 is negative, the refractive power of the sixth lens 6 is positive, and the refractive power of the seventh lens 7 is negative.
  • a portion (central portion) of the object-side surface of the second lens 2 near the optical axis O is convex toward the object side, and a portion (central portion) of the image-side surface of the second lens 2 near the optical axis O is recessed toward the object side.
  • the part (central part) of the object-side surface of the penultimate lens of the first group lens G1 near the image side (that is, the third lens 3 ) near the optical axis O protrudes toward the object side.
  • D2/D1 1.38.
  • the basic surface type parameters of the optical system of the imaging lens according to the sixth embodiment of the present application are recorded in the following Table 6A.
  • surface number is the corresponding surface of each optical component in the optical system;
  • surface type indicates the shape of the surface, where Sphere indicates a spherical surface, and Asphere is an aspheric surface.
  • Asphere is an aspheric surface.
  • the shape parameters of the surface are calculated by the following formula 1; "R” represents the radius of curvature of the surface; “Th” represents the inter-plane axial thickness of optical components (such as lenses); “Nd” represents the refractive index of the material; “Vd” represents Material Abbe number; "SA” means radial radius; “Conic” means conic coefficient.
  • the corresponding inf in each parameter means infinity.
  • the aspheric coefficients of each lens are recorded in the following Table 6B, and the data in Table 6B are higher-order coefficients of the aspheric surface whose surface type is Asphere in Table 6A.
  • the surface numbers of the aspheric surfaces in Table 6B correspond to the surface numbers in Table 6A. This formula can be used to determine the shape of an aspheric surface. Without these higher order coefficients, the aspheric surface type cannot be determined. All aspheric surface types can be defined using the following aspheric formula:
  • z is the sagittal height of the aspheric surface
  • r is the radial coordinate of the aspheric surface
  • c is the curvature of the vertex of the aspheric surface
  • K is the constant of the quadric surface
  • A4, A6, A8,..., A30 are the coefficients of the aspheric surface.
  • the optical system of the imaging lens according to the sixth embodiment of the present application can be obtained.
  • Spherical aberration diagrams, astigmatism diagrams and distortion diagrams of the optical system are shown in FIGS. 6B to 6D .
  • the curves in the spherical aberration diagram represent the values of the vertical axis spherical aberration of light of different wavelengths (the central wavelength is 650nm, 610nm, 555nm, 510nm, 470nm) passing through the optical system, which represents the light after passing through the optical imaging system The focus will be off.
  • the abscissa is the offset (in mm), and the ordinate is the normalized value.
  • the solid line in the astigmatism diagram indicates the degree of bending of light at the central wavelength (555nm) on the meridional image plane, and the dotted line indicates the degree of bending of light at the central wavelength (555nm) on the sagittal image plane.
  • the abscissa is the degree of curvature (in mm), and the ordinate is the field of view (in degrees).
  • the solid line in the distortion diagram represents the distortion value of light with a central wavelength (555 nm) passing through the optical system, which represents the magnitude of distortion under different viewing fields.
  • the abscissa is the distortion value, and the value of the distortion value is a percentage, and the ordinate is the field of view (unit is degree).
  • S1 indicates the surface of the optical component on the object side
  • S2 indicates the surface of the optical component on the image side
  • “1S1” indicates the surface of the first lens 1 on the object side
  • “1S2” indicates the surface of the first lens 1 on the image side.
  • the object distance corresponding to the minimum macro distance may be, for example, 120 mm.
  • the lens in the camera lens according to the present application can be made not only of optical plastic, but also of optical glass.
  • the present application also provides a camera module, which includes a photosensitive element and the camera lens described in the above specific embodiments, and the photosensitive element is located on the image side of the camera lens.
  • the camera lens is used to receive the light reflected by the object to be photographed and project it to the photosensitive element, and the photosensitive element is used to convert the light into an image signal.
  • the present application also provides an electronic device, which includes the above-mentioned camera module.
  • the electronic device may be a mobile phone, a tablet computer, a laptop computer, a monitor, and the like.

Abstract

本申请的提供了一种摄像镜头、摄像模组及电子设备。该摄像镜头的光学系统的透镜被分成两组，利用其中一组透镜移动实现光学系统对焦。这样，能够在不增加附加的广角或者专门的微距镜头并且不提高主摄镜头的面型工艺复杂度与制造难度的基础上，保证主摄镜头对对焦距离为无穷远的情况下成像品质较高的同时，提高对焦距离为微距的情况下的成像品质。这样，通过优化两组具有光焦度的透镜组，以在不同组合下找到不同对焦距离时具有更佳成像品质的共轭像，实现了在保证对焦距离为无穷远时成像品质的前提下使得对焦距离为微距时的成像分辨率效果显著提升。包括该摄像镜头的摄像模组和电子设备能够发挥同样的效果。

Description

摄像镜头、摄像模组及电子设备
本申请要求于2021年7月30日提交中国专利局、申请号为202110872362.X、发明名称为“摄像镜头、摄像模组及电子设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及摄像领域，尤其涉及一种摄像镜头、包括该摄像镜头的摄像模组以及包括该摄像模组的电子设备。
背景技术
近年来，随着电子设备使用越来越广泛，对电子设备摄像的质量需求越来越高，由此对多焦段电子设备摄像的成像品质提出了更高的要求。以手机为例，通常，手机包括主摄镜头和前置镜头。主摄镜头是手机最常使用的镜头，用户打开手机时默认开启的镜头即为主摄镜头。因此，对主摄镜头在各个场景的成像品质均有一定的要求，典型地除了对于对焦距离为无穷远的情况下成像品质要求高之外，对于对焦距离为微距的情况下成像品质也有对应的要求。因此，为了在不提高主摄镜头的面型工艺复杂度与制造难度的基础上，保证对于对焦距离为无穷远的情况下成像品质较高的同时，提高对焦距离为微距的情况下的成像品质，成为主摄镜头需要面对的主要问题之一。
为了解决上述问题，大部分现有的手机的主摄镜头采用像面对焦来补偿对焦距离变化时产生的离焦量，像面对焦实现的方式有如下两种。在第一种像面对焦方式中，将主摄镜头的所有透镜整合成镜片单元，将光学传感器与滤光片整合成相对固定的感测单元。主摄镜头的调焦马达控制镜片单元相对于感测单元沿着光轴产生相对运动，从而实现像面对焦。这种像面对焦方式为绝大部分主摄镜头实现的对焦方式。在第二种像面对焦方式中，将主摄镜头的所有透镜整合成固定不动的镜片单元，将光学传感器与滤光片整合成感测单元。主摄镜头的调焦马达带动感测单元相对于镜片单元沿着光轴相对运动，从而实现像面对焦。但是采用上述两种方式实现的像面对焦都存在无法对于对焦距离变化时产生的像散进行有效补偿的问题，一旦无法补偿像散，主摄镜头的画质分辨率就会降低，导致成像品质降低。
为了解决上述问题，还有一部分手机使用一个单独的微距镜头用于应用于对焦距离为微距的摄像场景，但是这样的微距镜头一般不具备在对焦距离为无穷远的情况下的摄像能力。而且使用广角或者专门的微距镜头实现微距摄像时，会要求手机增加一枚镜头，进而占用手机空间而且增大成本。
发明内容
有鉴于此，本申请的一个目的在于提供一种摄像镜头，其能够在不增加附加的广角或者专门的微距镜头并且不提高主摄镜头的面型工艺复杂度与制造难度的基础上，保证主摄镜头对于对焦距离为无穷远的情况下成像品质较高的同时，提高对焦距离为 微距的情况下的成像品质。这样，通过优化两组具有光焦度的透镜组，以在不同组合下找到不同对焦距离时具有更佳成像品质的共轭像，实现了在保证对焦距离为无穷远时成像品质的前提下使得对焦距离为微距时的成像分辨率效果显著提升。本申请的另一个目的在于提供包括该摄像镜头的摄像模组以及包括该摄像模组的电子设备，上述摄像模组和电子设备具有同样的效果。
为了实现上述目的，本申请采用如下的技术方案。
第一方面，本申请提供了一种如下的摄像镜头，所述摄像镜头包括从物侧朝向像侧沿光轴方向依次排列的第一组透镜和第二组透镜，所述第一组透镜能够沿所述光轴方向移动，所述第二组透镜固定；在所述摄像镜头的对焦距离由无穷远切换至最小微距的过程中，所述第一组透镜沿所述光轴方向向所述物侧移动，且所述第一组透镜的移动行程△与所述摄像镜头的光学总长TTL满足Δ/TTL≤0.2；所述摄像镜头的光学总长TTL与所述摄像镜头的最大半像高IMH满足0.5≤TTL/IMH≤2。
由此，通过对本申请的摄像镜头的光学系统的Δ/TTL的值进行限定，能够在保证视场角、像质的前提下降低调焦马达进行调焦的负担；并且通过对本申请的摄像镜头的光学系统的TTL/IMH的值进行限定，保证本申请的摄像镜头具有较佳的像质的情况下，用作主摄镜头。
在根据第一方面的一种可能的实施方式中，所述摄像镜头有N个透镜，所述第一组透镜包括N1个透镜，所述第二组透镜包括N2个透镜，满足7≤N≤10，4≤N1≤7且1≤N2≤4。
由此，通过将本申请的摄像镜头的光学系统的透镜数量限定在具体的范围，在保证本申请的摄像镜头的光学系统具有较好的视场角、像质的前提下，在用于例如手机等的电子设备时不会导致电子设备的厚度过大。
在根据第一方面的一种可能的实施方式中，所述摄像镜头的有效焦距EFL与所述摄像镜头的最大半像高IMH满足1≤EFL/IMH≤2。。
由此，通过对本申请的摄像镜头的光学系统的EFL/IMH进行限定，进一步保证本申请的摄像镜头具有较佳的像质的情况下，用作主摄镜头。
在根据第一方面的一种可能的实施方式中，所述第一组透镜具有正光焦度，所述第一组透镜的有效焦距EFL1与所述摄像镜头的有效焦距EFL满足0.5≤EFL1/EFL≤2。
由此，通过对本申请的摄像镜头的EFL1/EFL进行限定，能够将对整个光学系统的光焦度进行有效分配，有利于构建摄像镜头的光学系统。
在根据第一方面的一种可能的实施方式中，所述第一组透镜中最靠物侧的第一透镜具有正光焦度，所述第一组透镜中还包括与所述第一透镜相邻的第二透镜，所述第二透镜的物侧表面的近光轴的部分朝向物侧凸出，所述第二透镜的像侧表面的近光轴的部分朝向物侧凹陷。
由此，通过对部分透镜的光焦度和面型进行限定，有利于实现光线在摄像镜头中传播柔和顺畅。
在根据第一方面的一种可能的实施方式中，所述第一组透镜中最靠像侧的两个透镜中的一个透镜的物侧表面的近光轴的部分朝向物侧凸出。
由此，通过对部分透镜的面型进行限定，有利于实现光线在摄像镜头中传播更柔 和顺畅。
在根据第一方面的一种可能的实施方式中，所述摄像镜头的F数F#满足F#≤3.5。
由此，通过对本申请的摄像镜头的光学系统的F数的上限进行限定，保证了本申请的摄像镜头的成像性能。
在根据第一方面的一种可能的实施方式中，所述第一组透镜中各透镜的最大有效直径中的最大值D1与所述第二组透镜中各透镜的最大有效直径中的最小值D2满足1≤D2/D1≤3。
由此，通过对本申请的摄像镜头的光学系统的D2/D1进行限定，有利于构建摄像镜头的光学系统，使摄像镜头的光学系统易于加工。
在根据第一方面的一种可能的实施方式中，所述摄像镜头的透镜由光学塑料或光学玻璃制成。
由此，能够以性价比较高的材料构建摄像镜头的光学系统。
第二方面，本申请提供了一种如下的摄像模组，包括感光元件和以上技术方案中任意一项技术方案所述的摄像镜头，所述感光元件位于所述摄像镜头的像侧，其中，所述摄像镜头用于接收被拍摄物体所反射的光线并投射至所述感光元件，所述感光元件用于将所述光线转化成图像信号。
由此，包括根据本申请的摄像镜头的摄像模组能够发挥上述与摄像镜头的有益效果同样的有益效果。
第三方面，本申请提供了一种如下的电子设备，包括壳体和以上技术方案所述的摄像模组，所述摄像模组安装于所述壳体。
由此，包括根据本申请的摄像模组的电子设备能够发挥与上述摄像模组同样的有益效果。
本申请的这些和其他方面在以下(多个)实施例的描述中会更加简明易懂。
附图说明
包含在说明书中并且构成说明书的一部分的附图与说明书一起示出了本申请的示例性实施例、特征和方面，并且用于解释本申请的原理。
图1A是示出了根据本申请的第一实施例的摄像镜头的光学系统的示意图。
图1B是示出了图1A中的摄像镜头的光学系统的球色差图。
图1C是示出了图1A中的摄像镜头的光学系统的像散图。
图1D是示出了图1A中的摄像镜头的光学系统的畸变图。
图2A是示出了根据本申请的第二实施例的摄像镜头的光学系统的示意图。
图2B是示出了图2A中的摄像镜头的光学系统的球色差图。
图2C是示出了图2A中的摄像镜头的光学系统的像散图。
图2D是示出了图2A中的摄像镜头的光学系统的畸变图。
图3A是示出了根据本申请的第三实施例的摄像镜头的光学系统的示意图。
图3B是示出了图3A中的摄像镜头的光学系统的球色差图。
图3C是示出了图3A中的摄像镜头的光学系统的像散图。
图3D是示出了图3A中的摄像镜头的光学系统的畸变图。
图4A是示出了根据本申请的第四实施例的摄像镜头的光学系统的示意图。
图4B是示出了图4A中的摄像镜头的光学系统的球色差图。
图4C是示出了图4A中的摄像镜头的光学系统的像散图。
图4D是示出了图4A中的摄像镜头的光学系统的畸变图。
图5A是示出了根据本申请的第五实施例的摄像镜头的光学系统的示意图。
图5B是示出了图5A中的摄像镜头的光学系统的球色差图。
图5C是示出了图5A中的摄像镜头的光学系统的像散图。
图5D是示出了图5A中的摄像镜头的光学系统的畸变图。
图6A是示出了根据本申请的第六实施例的摄像镜头的光学系统的示意图。
图6B是示出了图6A中的摄像镜头的光学系统的球色差图。
图6C是示出了图6A中的摄像镜头的光学系统的像散图。
图6D是示出了图6A中的摄像镜头的光学系统的畸变图。
附图标记说明
G1第一组透镜 G2第二组透镜
1第一透镜 2第二透镜 3第三透镜 4第四透镜 5第五透镜 6第六透镜 7第七透镜 8第八透镜 9第九透镜 10第十透明
L滤光片 P像面 O光轴。
具体实施方式
以下将参考附图详细说明本申请的各种示例性实施例、特征和方面。附图中相同的附图标记表示功能相同或相似的元件。尽管在附图中示出了实施例的各种方面，但是除非特别指出，不必按比例绘制附图。
在这里专用的词“示例性”意为“用作例子、实施例或说明性”。这里作为“示例性”所说明的任何实施例不必解释为优于或好于其它实施例。
另外，为了更好的说明本申请，在下文的具体实施例中给出了众多的具体细节。本领域技术人员应当理解，没有某些具体细节，本申请同样可以实施。在一些实例中，对于本领域技术人员熟知的方法、手段、元件未作详细描述，以便于凸显本申请的主旨。
需要说明的是，在本申请中，如无其它特殊说明，“轴向”是指沿着镜头的光轴的方向，“物侧”是指以摄像镜头为基准，被摄对象所在侧，“像侧”是指以摄像镜头为基准，被摄对象经由镜头所成的像所在侧(也可以说是像面所在侧)。
在本申请中，如无其它特殊说明，特定技词的含义请参见如下说明。
摄像镜头的“F数”是摄像镜头的焦距与镜头通光直径之比得出的相对值，以“F#”表示。F数愈小，在同一单位时间内的通过光圈的进光量便愈多；F数越大，在同一单位时间内的通过光圈的进光量便愈少。
摄像镜头的“有效焦距”是从摄像镜头的主点到焦点在光轴上的距离，以“EFL”表示；第一组透镜的“有效焦距”是从第一组透镜的主点到焦点在光轴上的距离，以“EFL1”表示；第二组透镜的“有效焦距”是从第二组透镜的主点到焦点在光轴上的距离，以“EFL2”表示。
摄像镜头的“光学总长”是从摄像镜头的最靠物侧的透镜的物侧表面到像面在光轴上的距离，以“TTL”表示。
摄像镜头的“最大半像高”是像面上成像圆的最大半径，以“IMH”表示。
“正光焦度”是指透镜或透镜组有正的焦距，使透镜或透镜组能够发挥汇聚光线的作用。
“负光焦度”是指透镜或透镜组有负的焦距，使透镜或透镜组能够发挥使光线发散的作用。
“物面”是被成像物体所在的面。
“像面”是被成像物体成的像所在的面。
“物侧”是摄像镜头靠物面的一侧。
“像侧”是摄像镜头靠像面的一侧。
摄像镜头的“对焦距离”是从物面到像面在光轴上的距离。对焦距离为无穷远是指物距为无穷远的状态下摄像镜头实现对焦时物面到像面在光轴上的距离，对焦距离为最小微距是指物距为最小微距的状态下摄像镜头实现对焦时物面到像面在光轴上的距离。
以下对本申请的具体技术方案进行详细阐述。
为方便理解本申请的变焦的摄像镜头，首先说明本申请提供的摄像镜头的应用场景，本申请实施例提供的摄像镜头主要应用于移动终端的摄像模组中，移动终端可为手机、平板电脑、笔记本电脑、监视器、车载等便携式终端设备等。该摄像镜头可用于拍摄及录制影像，其拍摄场景包括了各种复杂和多元的拍摄应用场景，例如室内、室外、人物、环境等不同的场景。以手机为例，摄像模组的摄像镜头安装于手机的壳体，感光元件固定在壳体内。在使用时，光线穿过摄像镜头照射到感光元件，感光元件将光信号转换成电信号并成像，实现拍照的效果。现有技术中的摄像镜头无法兼顾无穷远和微距两种不同的拍摄模式，为此本申请实施例提供了一种如下的能够变焦的摄像镜头。
具体地，基于发明人进行的大量的试验和检测，为了实现本申请的目的，得到了如下的具体方案。该摄像镜头包括从物侧朝向像侧沿光轴方向依次排列的第一组透镜和第二组透镜，第一组透镜能够沿光轴方向移动，第二组透镜固定。在摄像镜头的对焦距离由无穷远切换至最小微距的过程中，第一组透镜沿光轴方向向物侧移动。第一组透镜的移动行程△与摄像镜头的光学总长TTL满足Δ/TTL≤0.2。摄像镜头的光学总长TTL与摄像镜头的最大半像高IMH满足0.5≤TTL/IMH≤2。进一步地，摄像镜头有N个透镜，第一组透镜包括N1个透镜，第二组透镜包括N2个透镜，满足7≤N≤10，4≤N1≤7且1≤N2≤4。进一步地，摄像镜头的有效焦距EFL与摄像镜头的最大半像高IMH满足1≤EFL/IMH≤2。进一步地，第一组透镜具有正光焦度，第一组透镜的有效焦距EFL1与摄像镜头的有效焦距EFL满足0.5≤EFL1/EFL≤2。进一步地，第一组透镜中最靠物侧的第一透镜具有正光焦度，第一组透镜中还包括与第一透镜相邻的第二透镜，第二透镜的物侧表面的近光轴的部分朝向物侧凸出，第二透镜的像侧表面的近光轴的部分朝向物侧凹陷。进一步地，第一组透镜中最靠像侧的两个透镜中的一个透镜的物侧表面的近光轴的部分朝向物侧凸出。进一步地，摄像镜头的F数F#满足F#≤3.5。进 一步地，第一组透镜中各透镜的最大有效直径中的最大值D1与第二组透镜中各透镜的最大有效直径中的最小值D2满足1≤D2/D1≤3。进一步地，摄像镜头的透镜由光学塑料或光学玻璃制成。此外，本申请还提供了一种如下的摄像模组，该摄像模组包括感光元件和采用如上方案的摄像镜头，感光元件位于摄像镜头的像侧。摄像镜头用于接收被拍摄物体所反射的光线并投射至感光元件，感光元件用于将光线转化成图像信号。本申请还提供了一种如下的电子设备，该电子设备包括壳体和上述摄像模组，摄像模组安装于壳体。
以下结合说明书附图说明根据本申请的第一实施例的摄像镜头的具体结构。
(根据本申请的第一实施例的摄像镜头)
如图1A所示，根据本申请的第一实施例的摄像镜头包括总共7个透镜、滤光片L和像面P。所有透镜均可以由光学塑料制成，这些透镜为从物侧朝向像侧依次排列的第一透镜1、第二透镜2、第三透镜3、第四透镜4、第五透镜5、第六透镜6和第七透镜7。第一透镜1、第二透镜2、第三透镜3、第四透镜4和第五透镜5被划分为第一组透镜G1，第六透镜6和第七透镜7被划分为第二组透镜G2。第一组透镜G1能够相对于摄像镜头的像面P移动，第二组透镜G2相对于像面P固定。这样，当摄像镜头在对焦距离为无穷远的情况下实现对焦转换到对焦距离为最小微距的情况下实现对焦的过程中，使第一组透镜G1相对于像面P沿着光轴O移动(朝向物侧移动)，第二组透镜G2保持相对于像面P固定。
在本实施例中，当摄像镜头在对焦距离为无穷远的情况下实现对焦时，摄像镜头(由图中的透镜构成的光学系统)的有效焦距EFL＝6.3mm，摄像镜头的F数F#＝2.1，摄像镜头的光学总长TTL＝7mm。当摄像镜头在对焦距离为最小微距的情况下实现对焦时，摄像镜头的有效焦距EFL＝6.04mm，摄像镜头的F数F#＝2.1，摄像镜头的光学总长TTL＝7.24mm。
进一步地，在本实施例中，当摄像镜头在对焦距离为无穷远的情况下实现对焦转换到对焦距离为最小微距的情况下实现对焦的过程中，第一组透镜G1相对于像面P在轴向上移动的距离(也就是对焦行程)Δ＝0.24mm，该对焦行程Δ与当摄像镜头在对焦距离为无穷远的情况下实现对焦时摄像镜头的光学总长TTL的比值，Δ/TTL＝0.034。
进一步地，在本实施例中，摄像镜头的最大半像高为IMH＝4.64mm，当摄像镜头在对焦距离为无穷远的情况下实现对焦时摄像镜头的光学总长TTL与该最大半像高IMH的比值TTL/IMH＝1.51。另外，当摄像镜头在对焦距离为无穷远的情况下实现对焦时摄像镜头的有效焦距与该最大半像高IMH的比值EFL/IMH＝1.36。
进一步地，在本实施例中，第一组透镜G1的光焦度为正，第二组透镜G2的光焦度为负，第一组透镜G1的有效焦距EFL1＝5.65mm，第二组透镜G2的有效焦距EFL2＝-6.17mm。因此，第一组透镜G1的有效焦距EFL1与当摄像镜头在对焦距离为无穷远的情况下实现对焦时摄像镜头的有效焦距EFL之间的比值EFL1/EFL＝0.9。更具体地，第一透镜1的光焦度为正，第二透镜2的光焦度为负，第三透镜3的光焦度为负，第四透镜4的光焦度为正，第五透镜5的光焦度为正，第六透镜6的光焦度为负，第七透镜7的光焦度为负。而且，第二透镜2的物侧表面的靠近光轴O的部分(中央部分)朝向物侧凸出，第二透镜2的像侧表面的靠近光轴O的部分(中央部分)朝 向物侧凹陷，第一组透镜G1中最靠像侧的透镜(即第五透镜5)物侧表面的靠近光轴O的部分(中央部分)朝向物侧凸出。
进一步地，在本实施例中，第一组透镜G1的所有透镜的最大有效直径的最大值为D1＝4.89mm，第二组透镜G2的所有透镜的最大有效直径的最小值为D2＝8.74mm，D2/D1＝1.79。
以下说明所有透镜、滤光片L的面型以及相关参数。
首先，在以下的表1A中记录了根据本申请的第一实施例的摄像镜头的光学系统的基本面型参数。在表1A中，“面号”为光学系统中各光学组件的对应的面；“表面类型”表示面的形状，其中Sphere表示球面，且Asphere为非球面，当“表面类型”为Asphere时对于面的形状参数由以下的式1进行计算；“R”表示面的曲率半径；“Th”表示光学组件(例如透镜)的面间轴向厚度；“Nd”表示材料折射率；“Vd”表示材料阿贝数；“SA”表示径向半径。另外，各参数中对应的inf表示无穷大。
[表1A]
面号 表面类型 R(mm) Th(mm) Nd Vd SA(mm)
物面 Sphere inf inf     1.562
1S1 Asphere 2.5 0.784506 1.544919 55.9299 1.518437
1S2 Asphere 19.13893 0.16068     1.43759
2S1 Asphere 5.965824 0.314127 1.670746 19.2383 1.361673
2S2 Asphere 3.15331 0.435848     1.299668
3S1 Asphere 190.691 0.28 1.670746 19.2383 1.2
3S2 Asphere 26.48588 0.286614     1.33
4S1 Asphere 175.9283 0.561911 1.544919 55.9299 1.619644
4S2 Asphere -11.5192 0.549522     1.78477
5S1 Asphere 5.096244 0.468531 1.567655 37.3171 2.191966
5S2 Asphere 12.25428 0.829283     2.446226
6S1 Asphere -16.9631 0.609549 1.544919 55.9299 3.0454
6S2 Asphere -3.89235 0.457231     3.950573
7S1 Asphere -14.4308 0.422572 1.537421 55.896 4.369239
7S2 Asphere 2.14E+00 0.437555     4.580111
LS1 Sphere inf 0.28 1.5168 64.17 4.649199
LS2 Sphere inf 0.122071     4.683156
像面P Sphere inf 0     4.70649
在以下的表1B中记录了各透镜的非球面系数，表1B中的数据为在表1A中表面 类型为Asphere的非球面的高次项系数。表1B中的非球面的面号与表1A中的面号对应。可以使用这个公式确定非球面的面型。如果缺乏这些高次项系数，无法确定非球面面型。所有非球面面型可利用以下非球面公式进行限定：
Figure PCTCN2022106809-appb-000001
其中，z为非球面的矢高，r为非球面的径向坐标，c为非球面顶点球曲率，K为二次曲面常数，A4,A6,A8,…,A30为非球面系数。式中自变量为非球面的径向坐标r，0<r<SA。SA具体数值参见表1A。非球面顶点球曲率c＝1/R。R具体数值参见表1A。圆锥系数Conic在本实施例中为0，K＝1。
[表1B]
Figure PCTCN2022106809-appb-000002
Figure PCTCN2022106809-appb-000003
由此，通过采用如上参数设计制造的根据本申请的第一实施例的摄像镜头的光学系统的基本参数记录在如下的表1C中。在该表1C中，“F#”为摄像镜头的光学系统的F值(光圈数)；“EFL”为摄像镜头的光学系统在对焦距离为无穷远的情况下对焦时的有效焦距；“EF1”为第一组透镜G1的有效焦距；“TTL”为摄像镜头的光学系统在对焦距离为无穷远的情况下对焦时的光学总长；“IMH”为像面P上成像圆的最大半径(最大半像高)；“Δ”为第一组透镜G1的对焦行程；“D1”为第一组透镜G1的所有透镜的最大有效直径的最大值；“D2”为第二组透镜G2的所有透镜的最大有效直径的最小值。
[表1C]
F# 2.1
EFL 6.3mm
IMH 4.64mm
TTL 7mm
Δ 0.24mm
Δ/TTL 0.034
TTL/IMH 1.51
EFL/IMH 1.36
D2/D1 1.79
EFL1/EFL 0.9
通过采用上述的方案，能够得到根据本申请的第一实施例的摄像镜头的光学系统。在图1B至图1D中示出了该光学系统的球色差图、像散图和畸变图。如图1B所示，球色差图中的曲线表示不同波长(中心波长为650nm、610nm、555nm、510nm、470nm)的光经过光学系统垂轴球差的值，其表示光线经过光学成像系统后的会聚焦点偏离。在该图1B中，横坐标为偏移量(单位为mm)，纵坐标为归一化值，多条曲线基本重叠在一起。如图1C所示，像散图中的实线表示中心波长(555nm)的光在子午像面的弯 曲程度，虚线表示中心波长(555nm)的光在弧矢像面的弯曲程度。横坐标为弯曲程度(单位为mm)，纵坐标为视场(单位为度)。如图1D所示，畸变图中的实线表示中心波长(555nm)的光经过光学系统的畸变值，其表示不同视场情况下的畸变大小。横坐标为畸变值，该畸变值的数值为百分数，纵坐标为视场(单位为度)。通过这些附图能够说明本申请的光学系统的像差，由此能够表明本申请的摄像镜头的光学性能较佳。以下各实施例中均具有类似的附图，这些附图具有类似的作用，因此在以下的实施例中就不再进行重复说明了。
以下说明根据本申请的第二实施例的摄像镜头。
(根据本申请的第二实施例的摄像镜头)
如图2A所示，根据本申请的第二实施例的摄像镜头包括总共10个透镜、滤光片L和像面P。所有透镜均可以由光学塑料制成，这些透镜为从物侧朝向像侧依次排列的第一透镜1、第二透镜2、第三透镜3、第四透镜4、第五透镜5、第六透镜6、第七透镜7、第八透镜8、第九透镜9和第十透镜10。第一透镜1、第二透镜2、第三透镜3、第四透镜4、第五透镜5和第六透镜6被划分为第一组透镜G1，第七透镜7、第八透镜8、第九透镜9和第十透镜10被划分为第二组透镜G2。第一组透镜G1能够相对于摄像镜头的像面P移动，第二组透镜G2相对于像面P固定。这样，当摄像镜头在对焦距离为无穷远的情况下实现对焦转换到对焦距离为最小微距的情况下实现对焦的过程中，使第一组透镜G1相对于像面P沿着光轴O移动(朝向物侧移动)，第二组透镜G2保持相对于像面P固定。
在本实施例中，当摄像镜头在对焦距离为无穷远的情况下实现对焦时，摄像镜头(由图中的透镜构成的光学系统)的有效焦距EFL＝5.78mm，摄像镜头的F数F#＝2.6，摄像镜头的光学总长TTL＝7.31mm。当摄像镜头在对焦距离为最小微距的情况下实现对焦时，摄像镜头的有效焦距EFL＝5.58mm，摄像镜头的F数F#＝2.6，摄像镜头的光学总长TTL＝7.61mm。
进一步地，在本实施例中，当摄像镜头在对焦距离为无穷远的情况下实现对焦转换到对焦距离为最小微距的情况下实现对焦的过程中，第一组透镜G1相对于像面P在轴向上移动的距离(也就是对焦行程)Δ＝0.30mm，该对焦行程与当摄像镜头在对焦距离为无穷远的情况下实现对焦时摄像镜头的光学总长TTL的比值，Δ/TTL＝0.041。
进一步地，在本实施例中，摄像镜头的最大半像高为IMH＝4.13mm，当摄像镜头在对焦距离为无穷远的情况下实现对焦时摄像镜头的光学总长TTL与该最大半像高IMH的比值TTL/IMH＝1.77。另外，当摄像镜头在对焦距离为无穷远的情况下实现对焦时摄像镜头的有效焦距与该最大半像高IMH的比值EFL/IMH＝1.40。
进一步地，在本实施例中，第一组透镜G1的光焦度为正，第二组透镜G2的光焦度为负，第一组透镜G1的有效焦距EFL1＝5.69mm，第二组透镜G2的有效焦距EFL2＝-8.45mm。因此，第一组透镜G1的有效焦距EFL1与当摄像镜头在对焦距离为无穷远的情况下实现对焦时摄像镜头的有效焦距EFL之间的比值EFL1/EFL＝0.98。更具体地，第一透镜1的光焦度为正，第二透镜2的光焦度为负，第三透镜3的光焦度为负，第四透镜4的光焦度为正，第五透镜5的光焦度为负，第六透镜6的光焦度为负，第七透镜7的光焦度为正，第八透镜8的光焦度为正，第九透镜9的光焦度为负， 第十透镜10的光焦度为负。而且，第二透镜2的物侧表面的靠近光轴O的部分(中央部分)朝向物侧凸出，第二透镜2的像侧表面的靠近光轴O的部分(中央部分)朝向物侧凹陷，第一组透镜G1中最靠像侧的透镜(即第六透镜6)物侧表面的靠近光轴O的部分(中央部分)朝向物侧凸出。
进一步地，在本实施例中，第一组透镜G1的所有透镜的最大有效直径的最大值为D1＝4.89mm，第二组透镜G2的所有透镜的最大有效直径的最小值为D2＝5.66mm，D2/D1＝1.16。
以下说明所有透镜、滤光片L的面型以及相关参数。
首先，在以下的表2A中记录了根据本申请的第二实施例的摄像镜头的光学系统的基本面型参数。在表2A中，“面号”为光学系统中各光学组件的对应的面；“表面类型”表示面的形状，其中Sphere表示球面，且Asphere为非球面，当“表面类型”为Asphere时对于面的形状参数由以下的式1进行计算；“R”表示面的曲率半径；“Th”表示光学组件(例如透镜)的面间轴向厚度；“Nd”表示材料折射率；“Vd”表示材料阿贝数；“SA”表示径向半径；“Conic”为圆锥系数。另外，各参数中对应的inf表示无穷大。
[表2A]
面号 表面类型 R(mm) Th(mm) Nd Vd SA(mm) Conic
物面 Sphere inf inf        
1S1 Asphere 2.40 0.80 1.54 55.93 1.54  
1S2 Asphere 14.69 0.18     1.45  
2S1 Asphere 5.99 0.30 1.67 19.24 1.35  
2S2 Asphere 3.24 0.52     1.21  
3S1 Asphere 40.26 0.32 1.67 19.24 1.20  
3S2 Asphere 13.98 0.28     1.33  
4S1 Asphere 188.34 0.41 1.54 55.93 1.50  
4S2 Asphere -5.96 0.10     1.61  
5S1 Asphere -24.57 0.22 1.54 55.93 1.77  
5S2 Asphere 76.97 0.47     1.86  
6S1 Asphere 6.75 0.43 1.57 37.32 2.06  
6S2 Asphere 18.15 0.78     2.26  
7S1 Asphere -9.33 0.41 1.54 55.93 2.69  
7S2 Asphere -9.07 0.11     2.83  
8S1 Asphere -27.89 0.29 1.54 55.93 3.07  
8S2 Asphere -3.79 0.34     3.34 -0.63
9S1 Asphere -14.34 0.23 1.54 55.90 3.40 1.64
9S2 Asphere -29.28 0.10     3.66  
10S1 Asphere -369.48 0.19 1.54 55.90 3.60  
10S2 Asphere 2.21 0.46     3.90 -1.05
LS1 Sphere inf 0.26 1.52 64.17 3.98  
LS2 Sphere inf 0.10     4.10  
像面P Sphere inf 0.00     4.17  
在以下的表2B中记录了各透镜的非球面系数，表2B中的数据为在表2A中表面类型为Asphere的非球面的高次项系数。表2B中的非球面的面号与表2A中的面号对应。可以使用这个公式确定非球面的面型。如果缺乏这些高次项系数，无法确定非球面面型。所有非球面面型可利用以下非球面公式进行限定：
Figure PCTCN2022106809-appb-000004
其中，z为非球面的矢高，r为非球面的径向坐标，c为非球面顶点球曲率，K为二次曲面常数，A4,A6,A8,…,A30为非球面系数。式中自变量为非球面的径向坐标r，0<r<SA。SA具体数值参见表2A。非球面顶点球曲率c＝1/R。R具体数值参见表2A。K＝1-Conic,其中Conic为圆锥系数。
[表2B]
Figure PCTCN2022106809-appb-000005
Figure PCTCN2022106809-appb-000006
由此，通过采用如上参数设计制造的根据本申请的第二实施例的摄像镜头的光学 系统的基本参数记录在如下的表2C中。在该表2C中，“F#”为摄像镜头的光学系统的F值(光圈数)；“EFL”为摄像镜头的光学系统在对焦距离为无穷远的情况下对焦时的有效焦距；“EF1”为第一组透镜G1的有效焦距；“TTL”为摄像镜头的光学系统在对焦距离为无穷远的情况下对焦时的光学总长；“IMH”为像面P上成像圆的最大半径(最大半像高)；“Δ”为第一组透镜G1的对焦行程；“D1”为第一组透镜G1的所有透镜的最大有效直径的最大值；“D2”为第二组透镜G2的所有透镜的最大有效直径的最小值。
[表2C]
F# 2.6
EFL 5.78mm
IMH 4.13mm
TTL 7.31mm
Δ 0.30mm
Δ/TTL 0.041
TTL/IMH 1.77
EFL/IMH 1.40
D2/D1 1.16
EFL1/EFL 0.98
通过采用上述的方案，能够得到根据本申请的第二实施例的摄像镜头的光学系统。在图2B至图2D中示出了该光学系统的球色差图、像散图和畸变图。如图2B所示，球色差图中的曲线表示不同波长(中心波长为650nm、610nm、555nm、510nm、470nm)的光经过光学系统垂轴球差的值，其表示光线经过光学成像系统后的会聚焦点偏离。在该图2B中，横坐标为偏移量(单位为mm)，纵坐标为归一化值，多条曲线基本重叠在一起。如图2C所示，像散图中的实线表示中心波长(555nm)的光在子午像面的弯曲程度，虚线表示中心波长(555nm)的光在弧矢像面的弯曲程度。横坐标为弯曲程度(单位为mm)，纵坐标为视场(单位为度)。如图2D所示，畸变图中的实线表示中心波长(555nm)的光经过光学系统的畸变值，该畸变值的数值为百分数，其表示不同视场情况下的畸变大小。横坐标为畸变值，纵坐标为视场(单位为度)。
以下说明根据本申请的第三实施例的摄像镜头。
(根据本申请的第三实施例的摄像镜头)
如图3A所示，根据本申请的第三实施例的摄像镜头包括总共7个透镜、滤光片L和像面P。所有透镜均可以由光学塑料制成，这些透镜为从物侧朝向像侧依次排列的第一透镜1、第二透镜2、第三透镜3、第四透镜4、第五透镜5、第六透镜6和第七透镜7。第一透镜1、第二透镜2、第三透镜3、第四透镜4、第五透镜5和第六透镜6被划分为第一组透镜G1，第七透镜7被划分为第二组透镜G2。第一组透镜G1能够相对于摄像镜头的像面P移动，第二组透镜G2相对于像面P固定。这样，当摄像镜头在对焦距离为无穷远的情况下实现对焦转换到对焦距离为最小微距的情况下实现对 焦的过程中，使第一组透镜G1相对于像面P沿着光轴O移动(朝向物侧移动)，第二组透镜G2保持相对于像面P固定。
在本实施例中，当摄像镜头在对焦距离为无穷远的情况下实现对焦时，摄像镜头(由图中的透镜构成的光学系统)的有效焦距EFL＝5.91mm，摄像镜头的F数F#＝3，摄像镜头的光学总长TTL＝6.64mm。当摄像镜头在对焦距离为最小微距的情况下实现对焦时，摄像镜头的有效焦距EFL＝6.08mm，摄像镜头的F数F#＝3，摄像镜头的光学总长TTL＝6.93mm。
进一步地，在本实施例中，当摄像镜头在对焦距离为无穷远的情况下实现对焦转换到对焦距离为最小微距的情况下实现对焦的过程中，第一组透镜G1相对于像面P在轴向上移动的距离(也就是对焦行程)Δ＝0.29mm，该对焦行程与当摄像镜头在对焦距离为无穷远的情况下实现对焦时摄像镜头的光学总长TTL的比值，Δ/TTL＝0.044。
进一步地，在本实施例中，摄像镜头的最大半像高为IMH＝3.85mm，当摄像镜头在对焦距离为无穷远的情况下实现对焦时摄像镜头的光学总长TTL与该最大半像高IMH的比值TTL/IMH＝1.73。另外，当摄像镜头在对焦距离为无穷远的情况下实现对焦时摄像镜头的有效焦距与该最大半像高IMH的比值EFL/IMH＝1.54。
进一步地，在本实施例中，第一组透镜G1的光焦度为正，第二组透镜G2的光焦度为正，第一组透镜G1的有效焦距EFL1＝5.77mm，第二组透镜G2的有效焦距EFL2＝10.87mm。因此，第一组透镜G1的有效焦距EFL1与当摄像镜头在对焦距离为无穷远的情况下实现对焦时摄像镜头的有效焦距EFL之间的比值EFL1/EFL＝0.98。更具体地，第一透镜1的光焦度为正，第二透镜2的光焦度为负，第三透镜3的光焦度为正，第四透镜4的光焦度为正，第五透镜5的光焦度为负，第六透镜6的光焦度为正，第七透镜7的光焦度为正。而且，第二透镜2的物侧表面的靠近光轴O的部分(中央部分)朝向物侧凸出，第二透镜2的像侧表面的靠近光轴O的部分(中央部分)朝向物侧凹陷，第一组透镜G1中最靠像侧的透镜(即第六透镜6)物侧表面的靠近光轴O的部分(中央部分)朝向物侧凸出。。
进一步地，在本实施例中，第一组透镜G1的所有透镜的最大有效直径的最大值为D1＝2.42mm，第二组透镜G2的所有透镜的最大有效直径的最小值为D2＝3.47mm，D2/D1＝1.43。
以下说明所有透镜、滤光片L的面型以及相关参数。
首先，在以下的表3A中记录了根据本申请的第三实施例的摄像镜头的光学系统的基本面型参数。在表3A中，“面号”为光学系统中各光学组件的对应的面；“表面类型”表示面的形状，其中Sphere表示球面，且Asphere为非球面，当“表面类型”为Asphere时对于面的形状参数由以下的式1进行计算；“R”表示面的曲率半径；“Th”表示光学组件(例如透镜)的面间轴向厚度；“Nd”表示材料折射率；“Vd”表示材料阿贝数；“SA”表示径向半径；“Conic”为圆锥系数。另外，各参数中对应的inf表示无穷大。
[表3A]
面号 表面类型 R(mm) Th(mm) Nd Vd SA(mm) Conic
物面 Sphere 0.00 inf inf      
1S1 Sphere 0.00 inf -0.30      
1S2 Asphere 0.49 2.05 0.73 1.54 55.93  
2S1 Asphere 0.03 38.60 0.10      
2S2 Asphere 0.20 5.07 0.39 1.67 19.24  
3S1 Asphere 0.46 2.17 0.55      
3S2 Asphere 0.08 11.94 0.24 1.67 19.24  
4S1 Asphere 0.03 35.34 0.40      
4S2 Asphere 0.04 27.76 0.21 1.54 55.93  
5S1 Asphere 0.01 106.25 0.62      
5S2 Asphere 0.21 4.72 0.42 1.57 37.32  
6S1 Asphere 0.24 4.21 0.18      
6S2 Asphere 0.15 6.55 0.34 1.57 37.32  
7S1 Asphere 0.13 7.48 1.19      
7S2 Asphere -0.18 -5.67 0.87 1.54 55.93  
LS1 Asphere -0.33 -3.06 0.10     -0.35
LS2 Sphere 0.00 inf 0.21 1.52 64.17  
像面P Sphere 0.00 inf 0.10      
在以下的表3B中记录了各透镜的非球面系数，表3B中的数据为在表3A中表面类型为Asphere的非球面的高次项系数。表3B中的非球面的面号与表3A中的面号对应。可以使用这个公式确定非球面的面型。如果缺乏这些高次项系数，无法确定非球面面型。所有非球面面型可利用以下非球面公式进行限定：
Figure PCTCN2022106809-appb-000007
其中，z为非球面的矢高，r为非球面的径向坐标，c为非球面顶点球曲率，K为二次曲面常数，A4,A6,A8,…,A30为非球面系数。式中自变量为非球面的径向坐标r，0<r<SA。SA具体数值参见表3A。非球面顶点球曲率c＝1/R。R具体数值参见表3A。K＝1-Conic,其中Conic为圆锥系数。
[表3B]
Figure PCTCN2022106809-appb-000008
Figure PCTCN2022106809-appb-000009
由此，通过采用如上参数设计制造的根据本申请的第三实施例的摄像镜头的光学系统的基本参数记录在如下的表3C中。在该表3C中，“F#”为摄像镜头的光学系统的F值(光圈数)；“EFL”为摄像镜头的光学系统在对焦距离为无穷远的情况下对焦时的 有效焦距；“EF1”为第一组透镜G1的有效焦距；“TTL”为摄像镜头的光学系统在对焦距离为无穷远的情况下对焦时的光学总长；“IMH”为像面P上成像圆的最大半径(最大半像高)；“Δ”为第一组透镜G1的对焦行程；“D1”为第一组透镜G1的所有透镜的最大有效直径的最大值；“D2”为第二组透镜G2的所有透镜的最大有效直径的最小值。
[表3C]
F# 3
EFL 5.91mm
IMH 3.85mm
TTL 6.64mm
Δ 0.29mm
Δ/TTL 0.044
TTL/IMH 1.73
EFL/IMH 1.54
D2/D1 1.43
EFL1/EFL 0.98
通过采用上述的方案，能够得到根据本申请的第三实施例的摄像镜头的光学系统。在图3B至图3D中示出了该光学系统的球色差图、像散图和畸变图。如图3B所示，球色差图中的曲线表示不同波长(中心波长为650nm、610nm、555nm、510nm、470nm)的光经过光学系统垂轴球差的值，其表示光线经过光学成像系统后的会聚焦点偏离。在该图3B中，横坐标为偏移量(单位为mm)，纵坐标为归一化值。如图3C所示，像散图中的实线表示中心波长(555nm)的光在子午像面的弯曲程度，虚线表示中心波长(555nm)的光在弧矢像面的弯曲程度。横坐标为弯曲程度(单位为mm)，纵坐标为视场(单位为度)。如图3D所示，畸变图中的实线表示中心波长(555nm)的光经过光学系统的畸变值，该畸变值的数值为百分数，其表示不同视场情况下的畸变大小。横坐标为畸变值，纵坐标为视场(单位为度)。
以下说明根据本申请的第四实施例的摄像镜头。
(根据本申请的第四实施例的摄像镜头)
如图4A所示，根据本申请的第四实施例的摄像镜头包括总共8个透镜、滤光片L和像面P。所有透镜均可以由光学塑料制成，这些透镜为从物侧朝向像侧依次排列的第一透镜1、第二透镜2、第三透镜3、第四透镜4、第五透镜5、第六透镜6、第七透镜7和第八透镜8。第一透镜1、第二透镜2、第三透镜3、第四透镜4、第五透镜5、第六透镜6和第七透镜7被划分为第一组透镜G1，第八透镜8被划分为第二组透镜G2。第一组透镜G1能够相对于摄像镜头的像面P移动，第二组透镜G2相对于像面P固定。这样，当摄像镜头在对焦距离为无穷远的情况下实现对焦转换到对焦距离为最小微距的情况下实现对焦的过程中，使第一组透镜G1相对于像面P沿着光轴O移动(朝向物侧移动)，第二组透镜G2保持相对于像面P固定。
在本实施例中，当摄像镜头在对焦距离为无穷远的情况下实现对焦时，摄像镜头(由图中的透镜构成的光学系统)的有效焦距EFL＝5.08mm，摄像镜头的F数F#＝2.8，摄像镜头的光学总长TTL＝6.39mm。当摄像镜头在对焦距离为最小微距的情况下实现对焦时，摄像镜头的有效焦距EFL＝5.20mm，摄像镜头的F数F#＝2.8，摄像镜头的光学总长TTL＝6.65mm。
进一步地，在本实施例中，当摄像镜头在对焦距离为无穷远的情况下实现对焦转换到对焦距离为最小微距的情况下实现对焦的过程中，第一组透镜G1相对于像面P在轴向上移动的距离(也就是对焦行程)Δ＝0.26mm，该对焦行程与当摄像镜头在对焦距离为无穷远的情况下实现对焦时摄像镜头的光学总长TTL的比值，Δ/TTL＝0.04。
进一步地，在本实施例中，摄像镜头的最大半像高为IMH＝3.61mm，当摄像镜头在对焦距离为无穷远的情况下实现对焦时摄像镜头的光学总长TTL与该最大半像高IMH的比值TTL/IMH＝1.77。另外，当摄像镜头在对焦距离为无穷远的情况下实现对焦时摄像镜头的有效焦距与该最大半像高IMH的比值EFL/IMH＝1.41。
进一步地，在本实施例中，第一组透镜G1的光焦度为正，第二组透镜G2的光焦度为正，第一组透镜G1的有效焦距EFL1＝4.70mm，第二组透镜G2的有效焦距EFL2＝11.91mm。因此，第一组透镜G1的有效焦距EFL1与当摄像镜头在对焦距离为无穷远的情况下实现对焦时摄像镜头的有效焦距EFL之间的比值EFL1/EFL＝0.93。更具体地，第一透镜1的光焦度为正，第二透镜2的光焦度为负，第三透镜3的光焦度为正，第四透镜4的光焦度为正，第五透镜5的光焦度为负，第六透镜6的光焦度为正，第七透镜7的光焦度为负，第八透镜8的光焦度为正。而且，第二透镜2的物侧表面的靠近光轴O的部分(中央部分)朝向物侧凸出，第二透镜2的像侧表面的靠近光轴O的部分(中央部分)朝向物侧凹陷，第一组透镜G1中最靠像侧的透镜(即第七透镜7)物侧表面的靠近光轴O的部分(中央部分)朝向物侧凸出。
进一步地，在本实施例中，第一组透镜G1的所有透镜的最大有效直径的最大值为D1＝4.5mm，第二组透镜G2的所有透镜的最大有效直径的最小值为D2＝7.12mm，D2/D1＝1.58。
以下说明所有透镜、滤光片L的面型以及相关参数。
首先，在以下的表4A中记录了根据本申请的第四实施例的摄像镜头的光学系统的基本面型参数。在表4A中，“面号”为光学系统中各光学组件的对应的面；“表面类型”表示面的形状，其中Sphere表示球面，且Asphere为非球面，当“表面类型”为Asphere时对于面的形状参数由以下的式1进行计算；“R”表示面的曲率半径；“Th”表示光学组件(例如透镜)的面间轴向厚度；“Nd”表示材料折射率；“Vd”表示材料阿贝数；“SA”表示径向半径；“Conic”为圆锥系数。另外，各参数中对应的inf表示无穷大。
[表4A]
面号 表面类型 R(mm) Th(mm) Nd Vd SA(mm) Conic
物面 Sphere inf inf        
1S1 Asphere 1.90 0.39 1.54 55.93 0.97  
1S2 Asphere 34.29 0.22     0.96  
2S1 Asphere 4.96 0.46 1.67 19.24 0.96  
2S2 Asphere 2.08 0.49     0.90  
3S1 Asphere 14.90 0.24 1.67 19.24 1.11  
3S2 Asphere -349.38 0.29     1.19  
4S1 Asphere 21.24 0.21 1.54 55.93 1.43  
4S2 Asphere -2.89E+6 0.16     1.50  
5S1 Asphere -398.93 0.16 1.54 55.93 1.60  
5S2 Asphere -551.72 0.36     1.64  
6S1 Asphere 3.72 0.39 1.57 37.32 1.83  
6S2 Asphere 6.96 0.24     1.94  
7S1 Asphere 29.89 0.32 1.57 37.32 1.97  
7S2 Asphere 7.16 1.28     2.25  
8S1 Asphere -5.62 0.78 1.54 55.93 2.61  
8S2 Asphere -3.16 0.10     3.56 -0.41
LS1 Sphere inf 0.21 1.52 64.17 4.64  
LS2 Sphere inf 0.10     4.77  
像面P Sphere inf 0.00     4.92  
在以下的表4B中记录了各透镜的非球面系数，表4B中的数据为在表4A中表面类型为Asphere的非球面的高次项系数。表4B中的非球面的面号与表4A中的面号对应。可以使用这个公式确定非球面的面型。如果缺乏这些高次项系数，无法确定非球面面型。所有非球面面型可利用以下非球面公式进行限定：
Figure PCTCN2022106809-appb-000010
其中，z为非球面的矢高，r为非球面的径向坐标，c为非球面顶点球曲率，K为二次曲面常数，A4,A6,A8,…,A30为非球面系数。式中自变量为非球面的径向坐标r，0<r<SA。SA具体数值参见表4A。非球面顶点球曲率c＝1/R。R具体数值参见表4A。K＝1-Conic,其中Conic为圆锥系数。
[表4B]
Figure PCTCN2022106809-appb-000011
Figure PCTCN2022106809-appb-000012
Figure PCTCN2022106809-appb-000013
由此，通过采用如上参数设计制造的根据本申请的第四实施例的摄像镜头的光学系统的基本参数记录在如下的表4C中。在该表4C中，“F#”为摄像镜头的光学系统的F值(光圈数)；“EFL”为摄像镜头的光学系统在对焦距离为无穷远的情况下对焦时的有效焦距；“EF1”为第一组透镜G1的有效焦距；“TTL”为摄像镜头的光学系统在对焦距离为无穷远的情况下对焦时的光学总长；“IMH”为像面P上成像圆的最大半径(最大半像高)；“Δ”为第一组透镜G1的对焦行程；“D1”为第一组透镜G1的所有透镜的最大有效直径的最大值；“D2”为第二组透镜G2的所有透镜的最大有效直径的最小值。
[表4C]
F# 2.8
EFL 5.08mm
IMH 3.61mm
TTL 6.39mm
Δ 0.26mm
Δ/TTL 0.04
TTL/IMH 1.77
EFL/IMH 1.41
D2/D1 1.58
EFL1/EFL 0.93
通过采用上述的方案，能够得到根据本申请的第四实施例的摄像镜头的光学系统。在图4B至图4D中示出了该光学系统的球色差图、像散图和畸变图。如图4B所示，球色差图中的曲线表示不同波长(中心波长为650nm、610nm、555nm、510nm、470nm)的光经过光学系统垂轴球差的值，其表示光线经过光学成像系统后的会聚焦点偏离。在该图4B中，横坐标为偏移量(单位为mm)，纵坐标为归一化值，多条曲线大致重叠在一起。如图4C所示，像散图中的实线表示中心波长(555nm)的光在子午像面的弯曲程度，虚线表示中心波长(555nm)的光在弧矢像面的弯曲程度。横坐标为弯曲程度(单位为mm)，纵坐标为视场(单位为度)。如图4D所示，畸变图中的实线表示中心波长(555nm)的光经过光学系统的畸变值，其表示不同视场情况下的畸变大小。横坐标为畸变值，该畸变值的数值为百分数，纵坐标为视场(单位为度)。
以下说明根据本申请的第五实施例的摄像镜头。
(根据本申请的第五实施例的摄像镜头)
如图5A所示，根据本申请的第五实施例的摄像镜头包括总共9个透镜、滤光片L和像面P。所有透镜均可以由光学塑料制成，这些透镜为从物侧朝向像侧依次排列的第一透镜1、第二透镜2、第三透镜3、第四透镜4、第五透镜5、第六透镜6、第七透 镜7、第八透镜8和第九透镜9。第一透镜1、第二透镜2、第三透镜3、第四透镜4和第五透镜5被划分为第一组透镜G1，第六透镜6、第七透镜7、第八透镜8和第九透镜9被划分为第二组透镜G2。第一组透镜G1能够相对于摄像镜头的像面P移动，第二组透镜G2相对于像面P固定。这样，当摄像镜头在对焦距离为无穷远的情况下实现对焦转换到对焦距离为最小微距的情况下实现对焦的过程中，使第一组透镜G1相对于像面P沿着光轴O移动(朝向物侧移动)，第二组透镜G2保持相对于像面P固定。
在本实施例中，当摄像镜头在对焦距离为无穷远的情况下实现对焦时，摄像镜头(由图中的透镜构成的光学系统)的有效焦距EFL＝5.30mm，摄像镜头的F数F#＝2.2，摄像镜头的光学总长TTL＝6.87mm。当摄像镜头在对焦距离为最小微距的情况下实现对焦时，摄像镜头的有效焦距EFL＝5.30mm，摄像镜头的F数F#＝2.2，摄像镜头的光学总长TTL＝7.11mm。
进一步地，在本实施例中，当摄像镜头在对焦距离为无穷远的情况下实现对焦转换到对焦距离为最小微距的情况下实现对焦的过程中，第一组透镜G1相对于像面P在轴向上移动的距离(也就是对焦行程)Δ＝0.24mm，该对焦行程与当摄像镜头在对焦距离为无穷远的情况下实现对焦时摄像镜头的光学总长TTL的比值，Δ/TTL＝0.035。
进一步地，在本实施例中，摄像镜头的最大半像高为IMH＝3.99mm，当摄像镜头在对焦距离为无穷远的情况下实现对焦时摄像镜头的光学总长TTL与该最大半像高IMH的比值TTL/IMH＝1.72。另外，当摄像镜头在对焦距离为无穷远的情况下实现对焦时摄像镜头的有效焦距与该最大半像高IMH的比值EFL/IMH＝1.33。
进一步地，在本实施例中，第一组透镜G1的光焦度为正，第二组透镜G2的光焦度为负，第一组透镜G1的有效焦距EFL1＝5.17mm，第二组透镜G2的有效焦距EFL2＝-6.04mm。因此，第一组透镜G1的有效焦距EFL1与当摄像镜头在对焦距离为无穷远的情况下实现对焦时摄像镜头的有效焦距EFL之间的比值EFL1/EFL＝0.98。更具体地，第一透镜1的光焦度为正，第二透镜2的光焦度为负，第三透镜3的光焦度为负，第四透镜4的光焦度为正，第五透镜5的光焦度为正，第六透镜6的光焦度为正，第七透镜7的光焦度为负，第八透镜8的光焦度为负，第九透镜9的光焦度为负。而且，第二透镜2的物侧表面的靠近光轴O的部分(中央部分)朝向物侧凸出，第二透镜2的像侧表面的靠近光轴O的部分(中央部分)朝向物侧凹陷，第一组透镜G1中最靠像侧的透镜(即第五透镜5)物侧表面的靠近光轴O的部分(中央部分)朝向物侧凸出。
进一步地，在本实施例中，第一组透镜G1的所有透镜的最大有效直径的最大值为D1＝4.22mm，第二组透镜G2的所有透镜的最大有效直径的最小值为D2＝4.94mm，D2/D1＝1.17。
以下说明所有透镜、滤光片L的面型以及相关参数。
首先，在以下的表5A中记录了根据本申请的第五实施例的摄像镜头的光学系统的基本面型参数。在表5A中，“面号”为光学系统中各光学组件的对应的面；“表面类型”表示面的形状，其中Sphere表示球面，且Asphere为非球面，当“表面类型”为Asphere时对于面的形状参数由以下的式1进行计算；“R”表示面的曲率半径；“Th”表示光学组 件(例如透镜)的面间轴向厚度；“Nd”表示材料折射率；“Vd”表示材料阿贝数；“SA”表示径向半径；“Conic”为圆锥系数。另外，各参数中对应的inf表示无穷大。
[表5A]
面号 表面类型 R(mm) Th(mm) Nd Vd SA(mm) Conic
物面 Sphere inf inf        
1S1 Sphere 2.39 0.74 1.53 64.44 1.34  
1S2 Sphere 14.49 0.15     1.29  
2S1 Asphere 4.03 0.26 1.67 19.24 1.25  
2S2 Asphere 2.58 0.58     1.17  
3S1 Asphere 173.02 0.38 1.67 19.24 1.20  
3S2 Asphere 12.22 0.25     1.33  
4S1 Asphere 30.40 0.57 1.54 55.93 1.57  
4S2 Asphere -9.37 0.16     1.71  
5S1 Asphere 3.75 0.45 1.57 37.32 1.96  
5S2 Asphere 8.00 0.22     2.11  
6S1 Asphere -9.28 0.24 1.54 55.93 2.39  
6S2 Asphere -5.16 0.15     2.47 -0.63
7S1 Asphere -4.50 0.22 1.54 55.90 2.66 -0.63
7S2 Asphere -4.64 1.30     2.71  
8S1 Asphere -11.28 0.22 1.54 55.93 2.75 6.40
8S2 Asphere -12.25 0.10     3.33 0.88
9S1 Asphere -12.54 0.22 1.54 55.90 3.35 0.88
9S2 Asphere 3.06 0.32     3.59 -0.98
LS1 Sphere inf 0.21 1.52 64.17 3.86  
LS2 Sphere inf 0.13     3.94  
像面P Sphere inf 0.00     4.03  
在以下的表5B中记录了各透镜的非球面系数，表5B中的数据为在表5A中表面类型为Asphere的非球面的高次项系数。表5B中的非球面的面号与表5A中的面号对应。可以使用这个公式确定非球面的面型。如果缺乏这些高次项系数，无法确定非球面面型。所有非球面面型可利用以下非球面公式进行限定：
Figure PCTCN2022106809-appb-000014
其中，z为非球面的矢高，r为非球面的径向坐标，c为非球面顶点球曲率，K为二次曲面常数，A4,A6,A8,…,A30为非球面系数。式中自变量为非球面的径向坐标r，0<r<SA。SA具体数值参见表5A。非球面顶点球曲率c＝1/R。R具体数值参见表5A。K＝1-Conic,其中Conic为圆锥系数。
[表5B]
Figure PCTCN2022106809-appb-000015
Figure PCTCN2022106809-appb-000016
由此，通过采用如上参数设计制造的根据本申请的第五实施例的摄像镜头的光学系统的基本参数记录在如下的表5C中。在该表5C中，“F#”为摄像镜头的光学系统的F值(光圈数)；“EFL”为摄像镜头的光学系统在对焦距离为无穷远的情况下对焦时的有效焦距；“EF1”为第一组透镜G1的有效焦距；“TTL”为摄像镜头的光学系统在对焦距离为无穷远的情况下对焦时的光学总长；“IMH”为像面P上成像圆的最大半径(最大半像高)；“Δ”为第一组透镜G1的对焦行程；“D1”为第一组透镜G1的所有透镜的最大有效直径的最大值；“D2”为第二组透镜G2的所有透镜的最大有效直径的最小值。
[表5C]
F# 2.2
EFL 5.30mm
IMH 3.99mm
TTL 6.87mm
Δ 0.24mm
Δ/TTL 0.035
TTL/IMH 1.72
EFL/IMH 1.33
D2/D1 1.17
EFL1/EFL 0.98
通过采用上述的方案，能够得到根据本申请的第五实施例的摄像镜头的光学系统。在图5B至图5D中示出了该光学系统的球色差图、像散图和畸变图。如图5B所示，球色差图中的曲线表示不同波长(中心波长为650nm、610nm、555nm、510nm、470nm)的光经过光学系统垂轴球差的值，其表示光线经过光学成像系统后的会聚焦点偏离。在该图5B中，横坐标为偏移量(单位为mm)，纵坐标为归一化值。如图5C所示，像散图中的实线表示中心波长(555nm)的光在子午像面的弯曲程度，虚线表示中心波长 (555nm)的光在弧矢像面的弯曲程度。横坐标为弯曲程度(单位为mm)，纵坐标为视场(单位为度)。如图5D所示，畸变图中的实线表示中心波长(555nm)的光经过光学系统的畸变值，其表示不同视场情况下的畸变大小。横坐标为畸变值，该畸变值的数值为百分数，纵坐标为视场(单位为度)。
以下说明根据本申请的第六实施例的摄像镜头。
(根据本申请的第六实施例的摄像镜头)
如图6A所示，根据本申请的第六实施例的摄像镜头包括总共7个透镜、滤光片L和像面P。所有透镜均可以由光学塑料制成，这些透镜为从物侧朝向像侧依次排列的第一透镜1、第二透镜2、第三透镜3、第四透镜4、第五透镜5、第六透镜6和第七透镜7。第一透镜1、第二透镜2、第三透镜3和第四透镜4被划分为第一组透镜G1，第五透镜5、第六透镜6和第七透镜7被划分为第二组透镜G2。第一组透镜G1能够相对于摄像镜头的像面P移动，第二组透镜G2相对于像面P固定。这样，当摄像镜头在对焦距离为无穷远的情况下实现对焦转换到对焦距离为最小微距的情况下实现对焦的过程中，使第一组透镜G1相对于像面P沿着光轴O移动(朝向物侧移动)，第二组透镜G2保持相对于像面P固定。
在本实施例中，当摄像镜头在对焦距离为无穷远的情况下实现对焦时，摄像镜头(由图中的透镜构成的光学系统)的有效焦距EFL＝4.56mm，摄像镜头的F数F#＝2.3，摄像镜头的光学总长TTL＝5.55mm。当摄像镜头在对焦距离为最小微距的情况下实现对焦时，摄像镜头的有效焦距EFL＝4.44mm，摄像镜头的F数F#＝2.3，摄像镜头的光学总长TTL＝5.70mm。
进一步地，在本实施例中，当摄像镜头在对焦距离为无穷远的情况下实现对焦转换到对焦距离为最小微距的情况下实现对焦的过程中，第一组透镜G1相对于像面P在轴向上移动的距离(也就是对焦行程)Δ＝0.15mm，该对焦行程与当摄像镜头在对焦距离为无穷远的情况下实现对焦时摄像镜头的光学总长TTL的比值，Δ/TTL＝0.027。
进一步地，在本实施例中，摄像镜头的最大半像高为IMH＝3.90mm，当摄像镜头在对焦距离为无穷远的情况下实现对焦时摄像镜头的光学总长TTL与该最大半像高IMH的比值TTL/IMH＝1.42。另外，当摄像镜头在对焦距离为无穷远的情况下实现对焦时摄像镜头的有效焦距与该最大半像高IMH的比值EFL/IMH＝1.17。
进一步地，在本实施例中，第一组透镜G1的光焦度为正，第二组透镜G2的光焦度为负，第一组透镜G1的有效焦距EFL1＝4.23mm，第二组透镜G2的有效焦距EFL2＝-5.75mm。因此，第一组透镜G1的有效焦距EFL1与当摄像镜头在对焦距离为无穷远的情况下实现对焦时摄像镜头的有效焦距EFL之间的比值EFL1/EFL＝0.93。更具体地，第一透镜1的光焦度为正，第二透镜2的光焦度为负，第三透镜3的光焦度为正，第四透镜4的光焦度为正，第五透镜5的光焦度为负，第六透镜6的光焦度为正，第七透镜7的光焦度为负。而且，第二透镜2的物侧表面的靠近光轴O的部分(中央部分)朝向物侧凸出，第二透镜2的像侧表面的靠近光轴O的部分(中央部分)朝向物侧凹陷，第一组透镜G1的倒数第二片靠近像侧的透镜(即第三透镜3)物侧表面的靠近光轴O的部分(中央部分)朝向物侧凸出。
进一步地，在本实施例中，第一组透镜G1的所有透镜的最大有效直径的最大值 为D1＝3.42mm，第二组透镜G2的所有透镜的最大有效直径的最小值为D2＝4.72mm，D2/D1＝1.38。
以下说明所有透镜、滤光片L的面型以及相关参数。
首先，在以下的表6A中记录了根据本申请的第六实施例的摄像镜头的光学系统的基本面型参数。在表6A中，“面号”为光学系统中各光学组件的对应的面；“表面类型”表示面的形状，其中Sphere表示球面，且Asphere为非球面，当“表面类型”为Asphere时对于面的形状参数由以下的式1进行计算；“R”表示面的曲率半径；“Th”表示光学组件(例如透镜)的面间轴向厚度；“Nd”表示材料折射率；“Vd”表示材料阿贝数；“SA”表示径向半径；“Conic”为圆锥系数。另外，各参数中对应的inf表示无穷大。
[表6A]
面号 表面类型 R(mm) Th(mm) Nd Vd SA(mm) Conic
物面 Sphere inf inf        
1S1 Asphere 2.00 0.75 1.54 55.93 1.46  
1S2 Asphere 16.24 0.15     1.30  
2S1 Asphere 7.51 0.32 1.67 19.24 1.04  
2S2 Asphere 2.83 0.46     0.80  
3S1 Asphere 30.70 0.27 1.67 19.24 1.35  
3S2 Asphere -21.66 0.31     1.39  
4S1 Asphere -10.98 0.54 1.54 55.93 1.62  
4S2 Asphere -3.31 0.51     1.71  
5S1 Asphere 9.14 0.22 1.57 37.32 2.13  
5S2 Asphere 8.49 0.34     2.36  
6S1 Asphere -6.80 0.30 1.54 55.93 2.47  
6S2 Asphere -2.71 0.44     2.73 -0.63
7S1 Asphere -5.91 0.15 1.54 55.90 2.77 1.64
7S2 Asphere 2.48 0.43     3.64 -1.05
LS1 Sphere inf 0.21 1.52 64.17 4.72  
LS2 Sphere inf 0.15     4.88  
像面P Sphere inf 0.00     5.25  
在以下的表6B中记录了各透镜的非球面系数，表6B中的数据为在表6A中表面类型为Asphere的非球面的高次项系数。表6B中的非球面的面号与表6A中的面号对应。可以使用这个公式确定非球面的面型。如果缺乏这些高次项系数，无法确定非球面面型。所有非球面面型可利用以下非球面公式进行限定：
Figure PCTCN2022106809-appb-000017
其中，z为非球面的矢高，r为非球面的径向坐标，c为非球面顶点球曲率，K为二次曲面常数，A4,A6,A8,…,A30为非球面系数。式中自变量为非球面的径向坐标r，0<r<SA。SA具体数值参见表6A。非球面顶点球曲率c＝1/R。R具体数值参见表6A。K＝1-Conic,其中Conic为圆锥系数。
[表6B]
Figure PCTCN2022106809-appb-000018
Figure PCTCN2022106809-appb-000019
由此，通过采用如上参数设计制造的根据本申请的第六实施例的摄像镜头的光学系统的基本参数记录在如下的表6C中。在该表6C中，“F#”为摄像镜头的光学系统的F值(光圈数)；“EFL”为摄像镜头的光学系统在对焦距离为无穷远的情况下对焦时的有效焦距；“EF1”为第一组透镜G1的有效焦距；“TTL”为摄像镜头的光学系统在对焦距离为无穷远的情况下对焦时的光学总长；“IMH”为像面P上成像圆的最大半径(最大半像高)；“Δ”为第一组透镜G1的对焦行程；“D1”为第一组透镜G1的所有透镜的最大有效直径的最大值；“D2”为第二组透镜G2的所有透镜的最大有效直径的最小值。
[表6C]
F# 2.3
EFL 4.56
IMH 3.90
TTL 5.55
Δ 0.15
Δ/TTL 0.03
TTL/IMH 1.42
EFL/IMH 1.17
D2/D1 1.38
EFL1/EFL 0.93
通过采用上述的方案，能够得到根据本申请的第六实施例的摄像镜头的光学系统。在图6B至图6D中示出了该光学系统的球色差图、像散图和畸变图。如图6B所示，球色差图中的曲线表示不同波长(中心波长为650nm、610nm、555nm、510nm、470nm)的光经过光学系统垂轴球差的值，其表示光线经过光学成像系统后的会聚焦点偏离。在该图6B中，横坐标为偏移量(单位为mm)，纵坐标为归一化值。如图6C所示，像散图中的实线表示中心波长(555nm)的光在子午像面的弯曲程度，虚线表示中心波长(555nm)的光在弧矢像面的弯曲程度。横坐标为弯曲程度(单位为mm)，纵坐标为视场(单位为度)。如图6D所示，畸变图中的实线表示中心波长(555nm)的光经过光学系统的畸变值，其表示不同视场情况下的畸变大小。横坐标为畸变值，该畸变值的数 值为百分数，纵坐标为视场(单位为度)。
以上内容对本申请的具体实施方式的示例性实施例及相关的变型例进行了阐述，以下进行补充说明。
i.在以上的具体实施方式中说明的表格中，在表1A、表1B、表2A、表2B、表3A、表3B、表4A、表4B、表5A、表5B、表6A、表6B中，对应“面号”所在列，S1表示光学组件的靠物侧的面，S2表示光学组件靠像侧的面。例如，“1S1”表示第一透镜1的靠物侧的那个面，“1S2”表示第一透镜1的靠像侧的那个面。
ii.在以上的具体实施方式中，最小微距对应的物距例如可以是120mm。
iii.根据本申请的摄像镜头中的透镜不仅可以由光学塑料制成，而且可以由光学玻璃制成。
iv.本申请还提供了一种摄像模组，该摄像模组包括感光元件和以上具体实施例中说明的摄像镜头，感光元件位于所述摄像镜头的像侧。摄像镜头用于接收被拍摄物体所反射的光线并投射至感光元件，感光元件用于将光线转化成图像信号。本申请还提供了一种电子设备，该电子设备包括上述摄像模组。电子设备可以为手机、平板电脑、笔记本电脑、监视器等。
尽管在此结合各实施例对本申请进行了描述，然而，在实施所要求保护的本申请过程中，本领域技术人员通过查看附图、公开内容、以及所附权利要求书，可理解并实现所公开实施例的其它变化。在权利要求中，“包括”一词不排除其他组成部分或步骤，“一”或“一个”不排除多个的情况。相互不同的从属权利要求中记载了某些措施，但这并不表示这些措施不能组合起来产生良好的效果。
以上已经描述了本申请的各实施例，上述说明是示例性的，并非穷尽性的，并且也不限于所披露的各实施例。在不偏离所说明的各实施例的范围和精神的情况下，对于本技术领域的普通技术人员来说许多修改和变更都是显而易见的。本文中所用术语的选择，旨在最好地解释各实施例的原理、实际应用或对市场中的技术的改进，或者使本技术领域的其它普通技术人员能理解本文披露的各实施例。

Claims (11)

  1. 一种摄像镜头，其特征在于，所述摄像镜头包括从物侧朝向像侧沿光轴方向依次排列的第一组透镜和第二组透镜，所述第一组透镜能够沿所述光轴方向移动，所述第二组透镜固定；
    在所述摄像镜头的对焦距离由无穷远切换至最小微距的过程中，所述第一组透镜沿所述光轴方向向所述物侧移动，且所述第一组透镜的移动行程△与所述摄像镜头的光学总长TTL满足Δ/TTL≤0.2；
    所述摄像镜头的光学总长TTL与所述摄像镜头的最大半像高IMH满足0.5≤TTL/IMH≤2。
  2. 根据权利要求1所述的摄像镜头，其特征在于，所述摄像镜头有N个透镜，所述第一组透镜包括N1个透镜，所述第二组透镜包括N2个透镜，满足7≤N≤10，4≤N1≤7且1≤N2≤4。
  3. 根据权利要求1或2所述的摄像镜头，其特征在于，所述摄像镜头的有效焦距EFL与所述摄像镜头的最大半像高IMH满足1≤EFL/IMH≤2。
  4. 根据权利要求1至3中任一项所述的摄像镜头，其特征在于，所述第一组透镜具有正光焦度，所述第一组透镜的有效焦距EFL1与所述摄像镜头的有效焦距EFL满足0.5≤EFL1/EFL≤2。
  5. 根据权利要求1至4中任一项所述的摄像镜头，其特征在于，所述第一组透镜中最靠物侧的第一透镜具有正光焦度，所述第一组透镜中还包括与所述第一透镜相邻的第二透镜，所述第二透镜的物侧表面的近光轴的部分朝向物侧凸出，所述第二透镜的像侧表面的近光轴的部分朝向物侧凹陷。
  6. 根据权利要求1至5中任一项所述的摄像镜头，其特征在于，所述第一组透镜中最靠像侧的两个透镜中的一个透镜的物侧表面的近光轴的部分朝向物侧凸出。
  7. 根据权利要求1至6中任一项所述的摄像镜头，其特征在于，所述摄像镜头的F数F#满足F#≤3.5。
  8. 根据权利要求1至7中任一项所述的摄像镜头，其特征在于，所述第一组透镜中各透镜的最大有效直径中的最大值D1与所述第二组透镜中各透镜的最大有效直径中的最小值D2满足1≤D2/D1≤3。
  9. 根据权利要求1至8中任一项所述的摄像镜头，其特征在于，所述摄像镜头的透镜由光学塑料或光学玻璃制成。
  10. 一种摄像模组，其特征在于，包括感光元件和如权利要求1至9中任一项所 述的摄像镜头，所述感光元件位于所述摄像镜头的像侧，其中，所述摄像镜头用于接收被拍摄物体所反射的光线并投射至所述感光元件，所述感光元件用于将所述光线转化成图像信号。
  11. 一种电子设备，其特征在于，包括壳体和权利要求10所述的摄像模组，所述摄像模组安装于所述壳体。
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