WO2023116600A1 - 变焦镜头 - Google Patents

变焦镜头 Download PDF

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Publication number
WO2023116600A1
WO2023116600A1 PCT/CN2022/139895 CN2022139895W WO2023116600A1 WO 2023116600 A1 WO2023116600 A1 WO 2023116600A1 CN 2022139895 W CN2022139895 W CN 2022139895W WO 2023116600 A1 WO2023116600 A1 WO 2023116600A1
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Prior art keywords
lens
zoom
wide
power
zoom lens
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PCT/CN2022/139895
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English (en)
French (fr)
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张磊
刘峥嵘
张占军
金永红
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东莞市宇瞳光学科技股份有限公司
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Publication of WO2023116600A1 publication Critical patent/WO2023116600A1/zh

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B15/00—Optical objectives with means for varying the magnification
    • G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
    • G02B15/16—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group
    • G02B15/163—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group
    • G02B15/167—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group having an additional fixed front lens or group of lenses
    • G02B15/173—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group having an additional fixed front lens or group of lenses arranged +-+

Definitions

  • the embodiments of the present application relate to lens technology, for example, to a zoom lens.
  • Optical imaging lenses are widely used in video conferencing, security monitoring, vehicle monitoring, drone aerial photography, smart transportation, etc. each field.
  • the zoom lens can change the shooting range by changing the focal length without changing the shooting distance, so it is more and more widely used.
  • zoom lenses used in security monitoring, UAV aerial photography and other fields in the relevant market, such as a large number of lenses, low imaging resolution, small imaging surface, and large volume. Therefore, zoom lenses need to be improved.
  • An embodiment of the present application provides a zoom lens, which is a four-element zoom lens, so as to realize a high-resolution optical lens with a super large target surface and high zoom.
  • the zoom lens uses 10 lenses, which can realize a 1/2-inch complementary metal oxide semiconductor (Complementary Metal Oxide Semiconductor, CMOS) under the target surface, a high-performance zoom lens with a diagonal field of view from about 10 degrees to 50 degrees, And it meets the imaging requirements when used in an environment of -40 degrees Celsius to 80 degrees Celsius.
  • CMOS complementary Metal Oxide Semiconductor
  • An embodiment of the present application provides a zoom lens, including a first lens group with positive refractive power, a second lens group with negative refractive power, and a third lens group with positive refractive power arranged in sequence along the optical axis from the object side to the image side and a fourth lens group of positive refractive power, the second lens group and the third lens group reciprocate along the optical axis when zooming;
  • the first lens group includes a first lens and a second lens
  • the second lens group includes a third lens, a fourth lens, and a fifth lens
  • the third lens group includes a sixth lens and a seventh lens and an eighth lens
  • the fourth lens group includes a ninth lens and a tenth lens
  • the zoom lens further includes a stop located between the sixth lens and the seventh lens.
  • FIG. 1 is a schematic structural diagram of a wide-angle end of a zoom lens provided in an embodiment of the present application
  • Fig. 2 is a schematic structural view of the telephoto end of the zoom lens in Fig. 1;
  • Fig. 3 is a wide-angle end spherical aberration curve diagram of a kind of zoom lens in the present embodiment
  • Fig. 4 is a spherical aberration curve at the telephoto end of a kind of zoom lens in the present embodiment
  • Fig. 5 is the light fan figure of a kind of zoom lens wide-angle end in the present embodiment
  • Fig. 6 is a light fan diagram at the telephoto end of a zoom lens in the present embodiment
  • FIG. 7 is a field curvature distortion diagram at the wide-angle end of a zoom lens in the present embodiment.
  • FIG. 8 is a field curvature distortion diagram at the telephoto end of a zoom lens in this embodiment.
  • FIG. 9 is a schematic structural diagram of another zoom lens at the wide-angle end provided by the embodiment of the present application.
  • Fig. 10 is a schematic structural view of the telephoto end of the zoom lens in Fig. 9;
  • FIG. 11 is a wide-angle end spherical aberration curve diagram of a zoom lens in the present embodiment
  • FIG. 12 is a spherical aberration curve at the telephoto end of a zoom lens in this embodiment
  • Fig. 13 is a light fan diagram at the wide-angle end of a zoom lens in the present embodiment
  • FIG. 14 is a light fan diagram at the telephoto end of a zoom lens in this embodiment.
  • FIG. 15 is a field curvature distortion diagram at the wide-angle end of a zoom lens in this embodiment.
  • FIG. 16 is a field curvature distortion diagram at the telephoto end of a zoom lens in this embodiment.
  • FIG. 17 is a schematic structural diagram of another zoom lens at the wide-angle end provided by the embodiment of the present application.
  • Fig. 18 is a schematic structural view of the telephoto end of the zoom lens in Fig. 17;
  • Fig. 19 is a wide-angle end spherical aberration curve diagram of a zoom lens in the present embodiment
  • FIG. 20 is a spherical aberration curve at the telephoto end of a zoom lens in this embodiment
  • FIG. 21 is a light fan diagram at the wide-angle end of a zoom lens in this embodiment.
  • FIG. 22 is a light fan diagram at the telephoto end of a zoom lens in this embodiment.
  • FIG. 23 is a field curvature distortion diagram at the wide-angle end of a zoom lens in this embodiment.
  • FIG. 24 is a field curvature distortion diagram at the telephoto end of a zoom lens in this embodiment.
  • FIG. 25 is a schematic structural diagram of another zoom lens at the wide-angle end provided by the embodiment of the present application.
  • Fig. 26 is a schematic structural view of the telephoto end of the zoom lens in Fig. 25;
  • FIG. 27 is a wide-angle end spherical aberration curve diagram of a zoom lens in this embodiment.
  • FIG. 28 is a spherical aberration curve at the telephoto end of a zoom lens in this embodiment.
  • Fig. 29 is a light fan diagram at the wide-angle end of a zoom lens in this embodiment.
  • FIG. 30 is a light fan diagram at the telephoto end of a zoom lens in this embodiment.
  • FIG. 31 is a field curvature distortion diagram at the wide-angle end of a zoom lens in this embodiment.
  • FIG. 32 is a diagram of field curvature distortion at the telephoto end of a zoom lens in this embodiment.
  • FIG. 1 is a schematic structural diagram of a wide-angle end of a zoom lens provided by an embodiment of the present application.
  • the zoom lens provided by the embodiment of the present application includes a first lens group 10 of positive refractive power, a second lens group 20 of negative refractive power, and a lens group of positive refractive power arranged in sequence along the optical axis from the object side to the image side.
  • the third lens group 30 and the fourth lens group 40 of positive refractive power, the second lens group 20 and the third lens group 30 reciprocate along the optical axis when zooming; wherein the first lens group 10 includes the first lens 101 and the second Lens 102, the second lens group 20 includes the third lens 201, the fourth lens 202 and the fifth lens 203, the third lens group 30 includes the sixth lens 301, the seventh lens 302 and the eighth lens 303, the fourth lens group 40 It includes a ninth lens 401 and a tenth lens 402 ; the zoom lens also includes an aperture 50 located between the sixth lens 301 and the seventh lens 302 .
  • the focal power is the reciprocal of the focal length, which characterizes the ability of the optical system to deflect light. The greater the absolute value of the optical power, the stronger the ability to bend light, and the smaller the absolute value of the optical power, the weaker the ability to bend light.
  • the focal power is positive, the refraction of light is converging; when the focal power is negative, the refraction of light is divergent.
  • the first lens group 10, the second lens group 20, the third lens group 30 and the fourth lens group 40 can be arranged in a lens barrel, through the second lens group 20 and the third lens group 30 The movement of the lens realizes the change of the focal length of the lens. By setting the focal power relationship of each lens group, the total effective focal length of the zoom lens can be zoomed continuously within the range of 10 mm to 45 mm.
  • the zoom lens is switched between the wide-angle end and the telephoto end through the reciprocating movement of the second lens group 20 and the third lens group 30 along the optical axis during zooming, wherein the total effective focal length of the zoom lens is within 10 Continuous zooming within the range of mm to 45 mm; by rationally designing the structure of each lens and the matching relationship of optical power, the zoom lens can achieve a high diagonal field of view angle from about 10 degrees to 50 degrees under the 1/2 inch CMOS target surface Performance zoom lens, and it can meet the imaging requirements when used in the environment of -40 degrees Celsius to 80 degrees Celsius.
  • the first lens 101 has positive optical power
  • the second lens 102 has negative optical power
  • the third lens 201 has negative optical power
  • the fourth lens 202 has positive optical power
  • the fifth lens 203 has negative optical power degree
  • the sixth lens 301 has positive refractive power
  • the seventh lens 302 has positive refractive power
  • the eighth lens 303 has negative refractive power
  • the ninth lens 401 has positive or negative refractive power
  • the tenth lens 402 has positive optical power Focus.
  • a good imaging effect is achieved by comprehensively setting the focal power of each lens.
  • the first lens 101 is a biconvex spherical lens
  • the second lens 102 is a concave-convex spherical lens
  • the third lens 201 is a convex-concave spherical lens
  • the fourth lens 202 is a concave-convex spherical lens
  • the fifth lens 203 is a biconcave spherical lens
  • the sixth lens 301 is a biconvex aspheric lens
  • the seventh lens 302 is a biconvex spherical lens
  • the eighth lens 303 is a biconcave spherical lens
  • the ninth lens 401 is a concave-convex or convex-concave aspheric lens
  • the tenth lens 402 is a convex-concave lens. aspheric lens.
  • the surface type of aspheric lens satisfies the formula:
  • Z represents the sagittal height of the aspheric surface
  • c represents the basic curvature at the apex
  • k represents the conic section constant
  • r represents the radial coordinate in the direction perpendicular to the optical axis
  • a i is the coefficient of the higher order term
  • a i r 2i is the aspheric surface Higher order term, i ⁇ (2,3,4,5.
  • the first lens 101 and the second lens 102 form a cemented lens
  • the fourth lens 202 and the fifth lens 203 form a cemented lens
  • the seventh lens 302 and the eighth lens 303 form a cemented lens, which is beneficial to correct chromatic aberration.
  • the focal power of the zoom lens satisfies:
  • the focal powers of the first lens 101 to the tenth lens 402 satisfy:
  • the refractive index and dispersion coefficient of the first lens 101 to the tenth lens 402 satisfy:
  • n1, n2, n3, n4, n5, n6, n7, n8, n9 and n10 respectively represent the refractive index of the first lens 101 to the tenth lens 402, v1, v2, v3, v4, v5, v6, v7, v8, v9, and v10 denote the dispersion coefficients of the first lens 101 to the tenth lens 402, respectively.
  • the displacement amount G2_L of the second lens group 20 from the wide-angle end to the telephoto end, and the displacement amount G3_L of the third lens group 30 from the wide-angle end to the telephoto end satisfies:
  • the image surface diameter IC of the zoom lens and the focal length F_W of the zoom lens at the wide-angle end satisfy:
  • the back focus BFL_W of the zoom lens at the wide-angle end and the total lens length TTL_W at the wide-angle end meet:
  • the diameter D1 of the first lens and the total lens length TTL_W at the wide-angle end satisfy:
  • the optical power of the zoom lens at the wide-angle end and optical power at the telephoto end satisfy:
  • FIG. 2 is a schematic structural view of the telephoto end of the zoom lens in FIG. 1, and Table 1 shows the parameters of the zoom lens corresponding to FIG. 1 and FIG. 2:
  • Table 2 shows the design values of each lens parameter of the zoom lens in Fig. 1 and Fig. 2:
  • the plane number 1 represents the front surface of the first lens 101 (the surface near the object side), the plane number 2 represents the rear surface of the first lens 101 (the surface near the image side), and so on, wherein, the plane The serial number 2 is the cemented surface of the first lens 101 and the second lens 102; the serial number 7 is the cemented surface of the fourth lens 202 and the fifth lens 203; the serial number 13 is the cemented surface of the seventh lens 302 and the eighth lens 303; Surface numbers 19 and 20 denote the front surface and the rear surface of the lens protection glass, respectively.
  • the radius of curvature indicates the degree of curvature of the lens surface. A positive value indicates that the surface is bent toward the image plane, and a negative value indicates that the surface is bent towards the object plane.
  • the thickness indicates The central axial distance from the current surface to the next surface
  • the refractive index nd indicates the surface number
  • the dispersion coefficient vd indicates the surface number
  • the semi-diameter indicates the semi-diameter of the surface type corresponding to a spherical surface, an aspherical surface, a plane or an image surface.
  • Table 3 is the zoom interval value in Table 2:
  • Table 4 A design value of the aspheric coefficient in the fixed-focus lens
  • Fig. 3 is the wide-angle end spherical aberration curve diagram of a kind of zoom lens in the present embodiment
  • Fig. 4 is the telephoto end spherical aberration curve diagram of a kind of zoom lens in the present embodiment
  • Fig. 5 is a kind of zoom lens in the present embodiment
  • Fig. 6 is the light fan diagram of a kind of zoom lens telephoto end in the present embodiment
  • Fig. 7 is the field curvature distortion figure of a kind of zoom lens wide-angle end in the present embodiment
  • Fig. 8 is the present embodiment Field curvature distortion diagrams of a zoom lens at the telephoto end, as can be seen from FIGS. 3 to 8 , the zoom lens provided by the embodiment of the present application has good imaging capability.
  • FIG. 9 is a schematic structural diagram of another zoom lens provided by the embodiment of the present application at the wide-angle end
  • FIG. 10 is a schematic structural diagram of the telephoto end of the zoom lens in FIG. 9 .
  • Table 5 shows the zoom lens corresponding to FIG. 9 and FIG. 10 parameters:
  • Table 6 shows the design values of each lens parameter of the zoom lens in Fig. 9 and Fig. 10:
  • the plane number 1 represents the front surface of the first lens 101 (the surface near the object side), the plane number 2 represents the rear surface of the first lens 101 (the surface near the image side), and so on, wherein, the plane The serial number 2 is the cemented surface of the first lens 101 and the second lens 102; the serial number 7 is the cemented surface of the fourth lens 202 and the fifth lens 203; the serial number 13 is the cemented surface of the seventh lens 302 and the eighth lens 303; Surface numbers 19 and 20 denote the front surface and the rear surface of the lens protection glass, respectively.
  • the radius of curvature indicates the degree of curvature of the lens surface. A positive value indicates that the surface is bent toward the image plane, and a negative value indicates that the surface is bent towards the object plane.
  • the thickness indicates The central axial distance from the current surface to the next surface
  • the refractive index nd indicates the surface number
  • the dispersion coefficient vd indicates the surface number
  • the semi-diameter indicates the semi-diameter of the surface type corresponding to a spherical surface, an aspherical surface, a plane or an image surface.
  • Table 7 shows the zoom interval values in Table 6:
  • Table 8 A design value of the aspheric coefficient in the fixed-focus lens
  • Figure 11 is a wide-angle end spherical aberration curve diagram of a zoom lens in this embodiment
  • Figure 12 is a telephoto end spherical aberration curve diagram of a zoom lens in this embodiment
  • Figure 13 is a zoom lens in this embodiment
  • Figure 14 is the light fan diagram at the telephoto end of a zoom lens in this embodiment
  • Figure 15 is the field curvature distortion diagram at the wide-angle end of a zoom lens in this embodiment
  • Figure 16 is this embodiment Field curvature distortion diagrams of a zoom lens at the telephoto end, as can be seen from FIGS. 11 to 16 , the zoom lens provided by the embodiment of the present application has good imaging capability.
  • FIG. 17 is a schematic structural diagram of another zoom lens provided by the embodiment of the present application at the wide-angle end
  • FIG. 18 is a schematic structural diagram of the telephoto end of the zoom lens in FIG. 17,
  • Table 9 shows the zoom lens corresponding to FIG. 17 and FIG. parameters:
  • Table 10 shows the design values of each lens parameter of the zoom lens in Fig. 17 and Fig. 18:
  • the plane number 1 represents the front surface of the first lens 101 (the surface near the object side), the plane number 2 represents the rear surface of the first lens 101 (the surface near the image side), and so on, wherein, the plane The serial number 2 is the cemented surface of the first lens 101 and the second lens 102; the serial number 7 is the cemented surface of the fourth lens 202 and the fifth lens 203; the serial number 13 is the cemented surface of the seventh lens 302 and the eighth lens 303; Surface numbers 19 and 20 denote the front surface and the rear surface of the lens protection glass, respectively.
  • the radius of curvature indicates the degree of curvature of the lens surface. A positive value indicates that the surface is bent toward the image plane, and a negative value indicates that the surface is bent towards the object plane.
  • the thickness indicates The central axial distance from the current surface to the next surface
  • the refractive index nd indicates the surface number
  • the dispersion coefficient vd indicates the surface number
  • the semi-diameter indicates the semi-diameter of the surface type corresponding to a spherical surface, an aspherical surface, a plane or an image surface.
  • Table 11 shows the zoom interval values in Table 10:
  • Table 12 A design value of the aspheric coefficient in the fixed-focus lens
  • Fig. 19 is a wide-angle end spherical aberration curve diagram of a zoom lens in this embodiment
  • Fig. 20 is a telephoto end spherical aberration curve diagram of a zoom lens in this embodiment
  • Fig. 21 is a zoom lens in this embodiment
  • Figure 22 is a light fan diagram at the telephoto end of a zoom lens in this embodiment
  • Figure 23 is a field curvature distortion diagram at the wide-angle end of a zoom lens in this embodiment
  • Figure 24 is this embodiment
  • the field curvature distortion diagram of a zoom lens at the telephoto end shows that the zoom lens provided by the embodiment of the present application has good imaging capability.
  • FIG. 25 is a schematic structural diagram of another zoom lens provided by an embodiment of the present application at the wide-angle end
  • FIG. 26 is a schematic structural schematic diagram of the telephoto end of the zoom lens in FIG. 25 .
  • Table 13 shows the zoom lens corresponding to FIG. 25 and FIG. 26 parameters:
  • Table 14 shows the design values of each lens parameter of the zoom lens in Fig. 25 and Fig. 26:
  • the plane number 1 represents the front surface of the first lens 101 (the surface near the object side), the plane number 2 represents the rear surface of the first lens 101 (the surface near the image side), and so on, wherein, the plane The serial number 2 is the cemented surface of the first lens 101 and the second lens 102; the serial number 7 is the cemented surface of the fourth lens 202 and the fifth lens 203; the serial number 13 is the cemented surface of the seventh lens 302 and the eighth lens 303; Surface numbers 19 and 20 denote the front surface and the rear surface of the lens protection glass, respectively.
  • the radius of curvature indicates the degree of curvature of the lens surface. A positive value indicates that the surface is bent toward the image plane, and a negative value indicates that the surface is bent towards the object plane.
  • the thickness indicates The central axial distance from the current surface to the next surface
  • the refractive index nd indicates the surface number
  • the dispersion coefficient vd indicates the surface number
  • the semi-diameter indicates the semi-diameter of the surface type corresponding to spherical, aspheric, flat or image surface.
  • Table 15 shows the zoom interval values in Table 14:
  • Table 16 A design value of the aspheric coefficient in the fixed-focus lens
  • -1.656732E-04 means that the a2 coefficient of the surface number 9 is -1.656732 ⁇ 10 -4 .
  • Fig. 27 is a wide-angle end spherical aberration curve diagram of a zoom lens in this embodiment
  • Fig. 28 is a telephoto end spherical aberration curve diagram of a zoom lens in this embodiment
  • Fig. 29 is a zoom lens in this embodiment
  • Figure 30 is the light fan diagram at the telephoto end of a zoom lens in this embodiment
  • Figure 31 is the field curvature distortion diagram at the wide-angle end of a zoom lens in this embodiment
  • Figure 32 is this embodiment
  • the field curvature distortion diagram of a zoom lens at the telephoto end shows that the zoom lens provided by the embodiment of the present application has good imaging capability.

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Abstract

本申请实施例公开了一种变焦镜头。该变焦镜头包括沿光轴从物方到像方依次排列的正光焦度的第一透镜组、负光焦度的第二透镜组、正光焦度的第三透镜组和正光焦度的第四透镜组，第二透镜组和第三透镜组在变焦时沿光轴往复移动；其中，第一透镜组包括第一透镜和第二透镜，第二透镜组包括第三透镜、第四透镜和第五透镜，第三透镜组包括第六透镜、第七透镜和第八透镜，第四透镜组包括第九透镜和第十透镜；该变焦镜头还包括光阑，光阑位于第六透镜和第七透镜之间。

Description

变焦镜头
本公开要求在2021年12月22日提交中国专利局、申请号为202111577446.7的中国专利申请的优先权，以上申请的全部内容通过引用结合在本申请中。
技术领域
本申请实施例涉及镜头技术，例如涉及一种变焦镜头。
背景技术
随着社会的不断发展和科学技术的不断进步，近年来，光学成像镜头也得到了迅猛发展，光学成像镜头被广泛的应用在视频会议、安防监控、车载监控、无人机航拍、智慧交通等各个领域。
由于定焦镜头的视场角固定，一款产品只能应用于特定场景，导致在许多场景下定焦镜头无法满足使用要求。变焦镜头在不改变拍摄距离的情况下，可以通过变动焦距来改变拍摄范围，因此被越来越广泛的使用。
但相关市场上用于安防监控、无人机航拍等领域的变焦镜头还存在许多的不足，如透镜数量多，成像分辨率低，成像面小，体积大等，因此需要对变焦镜头进行改进。
发明内容
本申请实施例提供一种变焦镜头，该变焦镜头为一种四组元变焦镜头，以实现一种超大靶面和高变倍的高分辨率光学镜头。该变焦镜头使用10枚镜片，可以实现1/2英寸互补式金属氧化物半导体(Complementary Metal Oxide Semiconductor，CMOS)靶面下，对角视场角从约10度到50度的高性能变焦镜头，且在-40摄氏度～80摄氏度环境下使用满足成像要求。
本申请实施例提供一种变焦镜头，包括沿光轴从物方到像方依次排列的正光焦度的第一透镜组、负光焦度的第二透镜组、正光焦度的第三透镜组和正光焦度的第四透镜组，所述第二透镜组和所述第三透镜组在变焦时沿所述光轴往复移动；
其中，所述第一透镜组包括第一透镜和第二透镜，所述第二透镜组包括第 三透镜、第四透镜和第五透镜，所述第三透镜组包括第六透镜、第七透镜和第八透镜，所述第四透镜组包括第九透镜和第十透镜；
所述变焦镜头还包括光阑，所述光阑位于所述第六透镜和所述第七透镜之间。
附图说明
图1为本申请实施例提供的一种变焦镜头广角端的结构示意图；
图2为图1中变焦镜头长焦端的结构示意图；
图3为本实施例中一种变焦镜头的广角端球差曲线图；
图4为本实施例中一种变焦镜头的长焦端球差曲线图；
图5为本实施例中一种变焦镜头广角端的光线光扇图；
图6为本实施例中一种变焦镜头长焦端的光线光扇图；
图7为本实施例中一种变焦镜头广角端的场曲畸变图；
图8为本实施例中一种变焦镜头长焦端的场曲畸变图；
图9为本申请实施例提供的另一种变焦镜头在广角端的结构示意图；
图10为图9中变焦镜头长焦端的结构示意图；
图11为本实施例中一种变焦镜头的广角端球差曲线图；
图12为本实施例中一种变焦镜头的长焦端球差曲线图；
图13为本实施例中一种变焦镜头广角端的光线光扇图；
图14为本实施例中一种变焦镜头长焦端的光线光扇图；
图15为本实施例中一种变焦镜头广角端的场曲畸变图；
图16为本实施例中一种变焦镜头长焦端的场曲畸变图；
图17为本申请实施例提供的又一种变焦镜头在广角端的结构示意图；
图18为图17中变焦镜头长焦端的结构示意图；
图19为本实施例中一种变焦镜头的广角端球差曲线图；
图20为本实施例中一种变焦镜头的长焦端球差曲线图；
图21为本实施例中一种变焦镜头广角端的光线光扇图；
图22为本实施例中一种变焦镜头长焦端的光线光扇图；
图23为本实施例中一种变焦镜头广角端的场曲畸变图；
图24为本实施例中一种变焦镜头长焦端的场曲畸变图；
图25为本申请实施例提供的又一种变焦镜头在广角端的结构示意图；
图26为图25中变焦镜头长焦端的结构示意图；
图27为本实施例中一种变焦镜头的广角端球差曲线图；
图28为本实施例中一种变焦镜头的长焦端球差曲线图；
图29为本实施例中一种变焦镜头广角端的光线光扇图；
图30为本实施例中一种变焦镜头长焦端的光线光扇图；
图31为本实施例中一种变焦镜头广角端的场曲畸变图；
图32为本实施例中一种变焦镜头长焦端的场曲畸变图。
具体实施方式
下面结合附图和实施例对本申请作说明。可以理解的是，此处所描述的实施例仅仅用于解释本申请。另外还需要说明的是，为了便于描述，附图中仅示出了与本申请相关的部分而非全部结构。
在本申请实施例中使用的术语是仅仅出于描述特定实施例的目的。需要注意的是，本申请实施例所描述的“上”、“下”、“左”、“右”等方位词是以附图所示的角度来进行描述的。此外在上下文中，还需要理解的是，当提到一个元件被形成在另一个元件“上”或“下”时，其不仅能够直接形成在另一个元件“上”或者“下”，也可以通过中间元件间接形成在另一元件“上”或者“下”。术语“第一”、“第二”等仅用于描述目的，并不表示任何顺序、数量或者重要性，而只是用来区分不同的组成部分。对于本领域的普通技术人员而言，可以根据情况理解上述术语在本申请中的含义。
图1为本申请实施例提供的一种变焦镜头广角端的结构示意图。参考图1，本申请实施例提供的变焦镜头包括沿光轴从物方到像方依次排列的正光焦度的第一透镜组10、负光焦度的第二透镜组20、正光焦度的第三透镜组30和正光焦度的第四透镜组40，第二透镜组20和第三透镜组30在变焦时沿光轴往复移动；其中第一透镜组10包括第一透镜101和第二透镜102，第二透镜组20包括第三透 镜201、第四透镜202和第五透镜203，第三透镜组30包括第六透镜301、第七透镜302和第八透镜303，第四透镜组40包括第九透镜401和第十透镜402；该变焦镜头还包括光阑50，光阑50位于第六透镜301和第七透镜302之间。
可以理解的是，光焦度为焦距的倒数，表征光学系统偏折光线的能力。光焦度的绝对值越大，对光线的弯折能力越强，光焦度的绝对值越小，对光线的弯折能力越弱。光焦度为正数时，光线的屈折是汇聚性的；光焦度为负数时，光线的屈折是发散性的。在本实施例中，可以将第一透镜组10、第二透镜组20、第三透镜组30和第四透镜组40设置于一个镜筒内，通过第二透镜组20和第三透镜组30的移动实现镜头焦距变化，通过设置各透镜组的光焦度关系，变焦镜头的总有效焦距可以在10毫米到45毫米的范围内连续变焦。
本实施例的技术方案，通过第二透镜组20和第三透镜组30在变焦时沿光轴往复移动来使变焦镜头在广角端和长焦端进行切换，其中变焦镜头的总有效焦距在10毫米～45毫米范围内连续变焦；通过合理设计各透镜的结构以及光焦度搭配关系，使得变焦镜头实现1/2英寸CMOS靶面下，对角视场角从约10度到50度的高性能变焦镜头，且在-40摄氏度～80摄氏度环境下使用满足成像要求。
可选的，第一透镜101具有正光焦度，第二透镜102具有负光焦度，第三透镜201具有负光焦度，第四透镜202具有正光焦度，第五透镜203具有负光焦度，第六透镜301具有正光焦度，第七透镜302具有正光焦度，第八透镜303具有负光焦度，第九透镜401具有正光焦度或负光焦度，第十透镜402具有正光焦度。通过综合设置各个透镜的光焦度，达到良好的成像效果。
可选的，第一透镜101为双凸球面透镜，第二透镜102为凹凸球面透镜，第三透镜201为凸凹球面透镜，第四透镜202为凹凸球面透镜，第五透镜203为双凹球面透镜，第六透镜301为双凸非球面透镜，第七透镜302为双凸球面透镜，第八透镜303为双凹球面透镜，第九透镜401为凹凸或凸凹非球面透镜，第十透镜402为凸凹非球面透镜。
可以理解的是，上述各透镜形状仅是示意性的，实际实施时各透镜的形状可以根据实际情况设计。
其中，非球面透镜面型满足公式：
Figure PCTCN2022139895-appb-000001
其中，Z表示非球面的矢高，c表示顶点处的基本曲率，k表示圆锥曲线常数，r表示垂直光轴方向的径向坐标，a i为高次项系数，a ir 2i为非球面的高次项，i∈(2,3,4,5。
可选的，第一透镜101和第二透镜102构成胶合透镜，第四透镜202和第五透镜203构成胶合透镜，第七透镜302和第八透镜303构成胶合透镜，有利于校正色差。变焦镜头的光焦度满足：
Figure PCTCN2022139895-appb-000002
Figure PCTCN2022139895-appb-000003
Figure PCTCN2022139895-appb-000004
其中，
Figure PCTCN2022139895-appb-000005
和
Figure PCTCN2022139895-appb-000006
分别表示第一透镜101与第二透镜102胶合后的光焦度、第四透镜202与第五透镜203胶合后的光焦度、第七透镜302与第八透镜303胶合后的光焦度，
Figure PCTCN2022139895-appb-000007
表示变焦镜头在广角端的光焦度。
可选的，第一透镜101至第十透镜402的光焦度满足：
Figure PCTCN2022139895-appb-000008
Figure PCTCN2022139895-appb-000009
Figure PCTCN2022139895-appb-000010
Figure PCTCN2022139895-appb-000011
Figure PCTCN2022139895-appb-000012
Figure PCTCN2022139895-appb-000013
Figure PCTCN2022139895-appb-000014
Figure PCTCN2022139895-appb-000015
Figure PCTCN2022139895-appb-000016
Figure PCTCN2022139895-appb-000017
其中，
Figure PCTCN2022139895-appb-000018
和
Figure PCTCN2022139895-appb-000019
分别表示第一透镜101至第十透镜402的光焦度，
Figure PCTCN2022139895-appb-000020
表示变焦镜头在广角端的光焦度，
Figure PCTCN2022139895-appb-000021
为表示第二透镜组20的光焦度，
Figure PCTCN2022139895-appb-000022
表示第三透镜组30的光焦度。
可选的，第一透镜101至第十透镜402的折射率和色散系数满足：
1.57≤n1≤1.77；41.8≤v1≤61.8；
1.90≤n2≤2.10；20.0≤v2≤39.1；
1.60≤n3≤1.80；45.5≤v3≤65.5；
1.89≤n4≤2.09；15.5≤v4≤26.5；
1.69≤n5≤1.89；37.5≤v5≤57.5；
1.40≤n6≤1.60；71.6≤v6≤91.6；
1.54≤n7≤1.74；45.4≤v7≤65.5；
1.75≤n8≤1.95；22.2≤v8≤42.2；
1.40≤n9≤1.80；15.0≤v9≤47.4；
1.39≤n10≤1.65；15.2≤v10≤39.5；
其中，n1、n2、n3、n4、n5、n6、n7、n8、n9和n10分别表示第一透镜101至第十透镜402的折射率，v1、v2、v3、v4、v5、v6、v7、v8、v9和v10分别表示第一透镜101至第十透镜402的色散系数。
可选的，为了使变焦镜头具有足够的变倍数且能够清晰合焦，第二透镜组20从广角端到长焦端的位移量G2_L、第三透镜组30从广角端到长焦端的位移量G3_L和广角端的镜头总长TTL_W满足：
0.08≤G2_L/TTL_W≤0.20；
0.26≤G3_L/TTL_W≤0.39。
可选的，为了使变焦镜头具有更大的成像靶面，能够保证变焦镜头具有更好的成像质量，画面更清晰，变焦镜头的像面直径IC与变焦镜头在广角端的焦距F_W满足：
F_W/IC≤1.50。
可选的，为了保证成像传感器和滤光片有足够的安装空间，变焦镜头在广角端的后焦BFL_W与在广角端的镜头总长TTL_W满足：
BFL_W/TTL_W≥0.08；
为了避免变焦镜头的口径过大，满足最终产品的安装空间要求，第一透镜的直径D1与在广角端的镜头总长TTL_W满足：
D1/TTL_W＜0.18。
可选的，为了保证变焦镜头在拥有高质量的同时也能满足较高的变倍倍率，变焦镜头在广角端的光焦度
Figure PCTCN2022139895-appb-000023
和在长焦端的光焦度
Figure PCTCN2022139895-appb-000024
满足：
Figure PCTCN2022139895-appb-000025
示例性的，图2为图1中变焦镜头长焦端的结构示意图，表1为与图1和图2对应变焦镜头的参数：
表1变焦镜头的参数
Figure PCTCN2022139895-appb-000026
Figure PCTCN2022139895-appb-000027
表2为图1和图2中的变焦镜头的各透镜参数设计值：
表2变焦镜头的各透镜参数设计值
面序号 表面类型 曲率半径 厚度 材料(nd) 材料(vd) 半直径
1 球面 20.220 4.222 1.67 51.8 8.09
2 球面 -28.377 0.800 2.00 29.1 7.50
3 球面 -72.473 变焦间隔1     7.14
4 球面 72.895 0.800 1.70 55.5 4.92
5 球面 14.708 1.469     4.41
6 球面 -13.971 1.026 1.99 16.5 4.34
7 球面 -10.674 0.799 1.79 47.5 4.36
8 球面 91.858 变焦间隔2     4.33
9 非球面 9.413 2.299 1.50 81.6 4.33
10 非球面 -13.918 -0.300     4.22
光阑 平面 无限 1.061     4.00
12 球面 8.192 3.003 1.64 55.5 3.85
13 球面 -15.537 3.003 1.85 32.2 3.38
14 球面 4.902 变焦间隔3     2.56
15 非球面 10.568 1.627 1.50 27.1 2.61
16 非球面 10.191 0.909     2.80
17 非球面 16.175 1.691 1.55 23.9 3.12
18 非球面 -23.935 2.000     3.06
19 平面 无限 0.300 1.52 64.2 6.00
20 平面 无限 3.003     6.00
21 像面 无限       4.00
其中，面序号1表示第一透镜101的前表面(靠近物方一侧的表面)，面序号2表示第一透镜101的后表面(靠近像方一侧的表面)，依次类推，其中，面序号2为第一透镜101与第二透镜102的胶合面；面序号7为第四透镜202和第五透镜203的胶合面；面序号13为第七透镜302和第八透镜303的胶合面；面序号19和20分别表示镜头保护玻璃的前表面和后表面。曲率半径表示透镜表面的弯曲程度，正值表示该表面弯向像面一侧，负值表示该表面弯向物面一侧，其中“无限”表示该表面为平面，曲率半径为无穷大；厚度表示当前表面到下一表面的中心轴向距离，折射率nd(d表示面序号)表示当前表面到下一表面之间的材料对光线的偏折能力，色散系数vd(d表示面序号)表示当前表面到下一表面之间的材料对光线的色散特性，半直径表示表面类型对应为球面、非球面、平面或像面的半直径。
表3为表2中变焦间隔值：
表3变焦间隔的一种设计值
  广角端 长焦端
变焦间隔1 2.508 8.341
变焦间隔2 14.783 0.499
变焦间隔3 0.997 9.449
表4图1和图2中变焦镜头中非球面面型参数：
表4定焦镜头中非球面系数的一种设计值
面序号 k a 2 a 3 a 4 a 5
9 0.129 -1.526909E-04 -3.894350E-06 1.946336E-07 -6.559635E-09
10 1.948 2.427302E-04 -2.164915E-06 1.993247E-07 -6.037180E-09
15 -14.175 -1.934940E-03 -1.500527E-04 1.498545E-05 -5.609678E-07
16 3.558 -4.825214E-03 -2.126437E-04 1.970587E-05 -6.029057E-07
17 -50.001 5.546929E-03 -2.599795E-04 1.286014E-05 -3.313241E-07
18 -49.958 4.576029E-03 1.697143E-04 -8.378684E-06 -8.561761E-08
上述表4中采用的是科学计数法，示例性的，-1.526909E-04表示面序号9的a2系数为-1.526909×10 -4。图3为本实施例中一种变焦镜头的广角端球差曲线图，图4为本实施例中一种变焦镜头的长焦端球差曲线图，图5为本实施例中一种变焦镜头广角端的光线光扇图，图6为本实施例中一种变焦镜头长焦端的光线光扇图，图7为本实施例中一种变焦镜头广角端的场曲畸变图，图8为本实施例中一种变焦镜头长焦端的场曲畸变图，由图3～图8可知，本申请实施例提供的变焦镜头具有良好的成像能力。
示例性的，图9为本申请实施例提供的另一种变焦镜头在广角端的结构示意图，图10为图9中变焦镜头长焦端的结构示意图，表5为与图9和图10对应变焦镜头的参数：
表5变焦镜头的参数
Figure PCTCN2022139895-appb-000028
Figure PCTCN2022139895-appb-000029
表6为图9和图10中的变焦镜头的各透镜参数设计值：
表6变焦镜头的各透镜参数设计值
面序号 表面类型 曲率半径 厚度 材料(nd) 材料(vd) 半直径
1 球面 22.742 3.516 1.67 51.8 7.03
2 球面 -22.134 0.800 2.00 29.1 6.42
3 球面 -46.729 变焦间隔1     6.06
4 球面 -114.139 0.800 1.70 55.5 4.51
5 球面 17.146 1.234     4.15
6 球面 -13.704 1.036 1.99 16.5 4.10
7 球面 -10.229 0.800 1.79 47.5 4.11
8 球面 -279.955 变焦间隔2     4.07
9 非球面 9.809 1.924 1.50 81.6 3.73
10 非球面 -13.613 -0.300     3.63
光阑 平面 无限 0.399     3.48
12 球面 8.389 2.249 1.64 55.4 3.48
13 球面 -31.012 3.000 1.85 32.2 3.16
14 球面 5.538 变焦间隔3     2.47
15 非球面 14.887 0.800 1.50 37.4 2.51
16 非球面 8.263 0.419     2.77
17 非球面 15.083 2.188 1.56 29.5 3.04
18 非球面 -28.510 2.000     3.08
19 平面 无限 0.300 1.52 64.2 6.00
20 平面 无限 6.400     6.00
21 像面 无限       4.90
其中，面序号1表示第一透镜101的前表面(靠近物方一侧的表面)，面序号2表示第一透镜101的后表面(靠近像方一侧的表面)，依次类推，其中，面序号2为第一透镜101与第二透镜102的胶合面；面序号7为第四透镜202和第五透镜203的胶合面；面序号13为第七透镜302和第八透镜303的胶合面；面序号19和20分别表示镜头保护玻璃的前表面和后表面。曲率半径表示透镜表面的弯曲程度，正值表示该表面弯向像面一侧，负值表示该表面弯向物面一侧，其中“无限”表示该表面为平面，曲率半径为无穷大；厚度表示当前表面到下一表面的中心轴向距离，折射率nd(d表示面序号)表示当前表面到下一表面之间的材料对光线的偏折能力，色散系数vd(d表示面序号)表示当前表面到下一表面之间的材料对光线的色散特性，半直径表示表面类型对应为球面、非球面、平面或像面的半直径。
表7为表6中变焦间隔值：
表7变焦间隔的一种设计值
  广角端 长焦端
变焦间隔1 1.496 8.358
变焦间隔2 15.940 0.500
变焦间隔3 0.999 9.578
表8图9和图10中变焦镜头中非球面面型参数：
表8定焦镜头中非球面系数的一种设计值
面序号 k a 2 a 3 a 4 a 5
9 0.137 -1.930434E-04 4.188904E-06 -3.444464E-07 9.427894E-09
10 2.985 2.496578E-04 7.929726E-06 -3.947013E-07 1.245348E-08
15 -49.999 -8.503353E-03 4.302062E-05 3.744786E-05 -2.431147E-06
16 2.605 -1.248412E-02 4.510336E-04 -6.391478E-06 -6.165466E-07
17 -50.001 4.324223E-03 -1.173794E-04 1.853402E-06 -3.190149E-08
18 50.000 3.455850E-03 2.323386E-04 -1.872707E-05 5.129120E-07
上述表8中采用的是科学计数法，示例性的，-1.930434E-04表示面序号9的a2系数为-1.930434×10 -4。图11为本实施例中一种变焦镜头的广角端球差曲线图，图12为本实施例中一种变焦镜头的长焦端球差曲线图，图13为本实施例中一种变焦镜头广角端的光线光扇图，图14为本实施例中一种变焦镜头长焦端的光线光扇图，图15为本实施例中一种变焦镜头广角端的场曲畸变图，图16为本实施例中一种变焦镜头长焦端的场曲畸变图，由图11～图16可知，本申请实施例提供的变焦镜头具有良好的成像能力。
示例性的，图17为本申请实施例提供的又一种变焦镜头在广角端的结构示 意图，图18为图17中变焦镜头长焦端的结构示意图，表9为与图17和图18对应变焦镜头的参数：
表9变焦镜头的参数
Figure PCTCN2022139895-appb-000030
表10为图17和图18中的变焦镜头的各透镜参数设计值：
表10变焦镜头的各透镜设计值
面序号 表面类型 曲率半径 厚度 材料(nd) 材料(vd) 半直径
1 球面 21.507 3.582 1.67 51.8 7.10
2 球面 -22.889 0.800 2.00 29.1 6.47
3 球面 -50.049 变焦间隔1     6.10
4 球面 -156.616 0.800 1.70 55.5 4.49
5 球面 16.783 1.237     4.12
6 球面 -13.687 1.035 1.99 16.5 4.07
7 球面 -10.184 0.799 1.79 47.5 4.08
8 球面 1108.130 变焦间隔2     4.02
9 非球面 9.213 1.978 1.50 81.6 3.71
10 非球面 -13.437 -0.400     3.60
光阑 平面 无限 0.499     3.48
12 球面 8.350 2.376 1.64 55.4 3.45
13 球面 -28.183 2.729 1.85 32.2 3.10
14 球面 5.356 变焦间隔3     2.44
15 非球面 17.172 0.800 1.50 35.2 2.48
16 非球面 9.308 0.208     2.73
17 非球面 15.317 2.557 1.49 27.3 2.94
18 非球面 -22.447 2.000     3.08
19 平面 无限 0.300 1.52 64.2 6.00
20 平面 无限 6.182     6.00
21 像面 无限       4.84
其中，面序号1表示第一透镜101的前表面(靠近物方一侧的表面)，面序号2表示第一透镜101的后表面(靠近像方一侧的表面)，依次类推，其中，面序号2为第一透镜101与第二透镜102的胶合面；面序号7为第四透镜202和第五透镜203的胶合面；面序号13为第七透镜302和第八透镜303的胶合面；面序号19和20分别表示镜头保护玻璃的前表面和后表面。曲率半径表示透镜表面的弯曲程度，正值表示该表面弯向像面一侧，负值表示该表面弯向物面一侧，其中“无限”表示该表面为平面，曲率半径为无穷大；厚度表示当前表面到下一表面的中心轴向距离，折射率nd(d表示面序号)表示当前表面到下一表面之间的材料对光线的偏折能力，色散系数vd(d表示面序号)表示当前表面到下一表面之间的材 料对光线的色散特性，半直径表示表面类型对应为球面、非球面、平面或像面的半直径。
表11为表10中变焦间隔值：
表11变焦间隔的一种设计值
  广角端 长焦端
变焦间隔1 1.495 8.248
变焦间隔2 16.025 0.499
变焦间隔3 0.999 9.772
表12图17和图18中变焦镜头中非球面面型参数：
表12定焦镜头中非球面系数的一种设计值
面序号 k a 2 a 3 a 4 a 5
9 0.184 -2.441828E-04 8.332616E-06 -7.715869E-07 2.751844E-08
10 7.355 4.544994E-04 2.862298E-05 -1.550907E-06 8.725986E-08
15 -46.860 -8.508773E-03 1.157480E-04 3.521591E-05 -2.258188E-06
16 3.714 -1.073478E-02 3.711567E-04 -3.740246E-07 -7.530936E-07
17 -50.003 4.828976E-03 -1.924650E-04 5.530569E-06 -9.932085E-08
18 29.189 3.242376E-03 1.902449E-04 -1.598385E-05 4.941582E-07
其中，上述表12中采用的是科学计数法，示例性的，-2.441828E-04表示面序号9的a2系数为-2.441828×10 -4。
图19为本实施例中一种变焦镜头的广角端球差曲线图，图20为本实施例中一种变焦镜头的长焦端球差曲线图，图21为本实施例中一种变焦镜头广角端的光线光扇图，图22为本实施例中一种变焦镜头长焦端的光线光扇图，图23为本实施例中一种变焦镜头广角端的场曲畸变图，图24为本实施例中一种变焦镜头长焦端的场曲畸变图，由图19～图24可知，本申请实施例提供的变焦镜头具有良好的成像能力。
示例性的，图25为本申请实施例提供的又一种变焦镜头在广角端的结构示意图，图26为图25中变焦镜头长焦端的结构示意图，表13为与图25和图26对应变焦镜头的参数：
表13变焦镜头的参数
Figure PCTCN2022139895-appb-000031
Figure PCTCN2022139895-appb-000032
表14为图25和图26中的变焦镜头的各透镜参数设计值：
表14变焦镜头的各透镜参数设计值
面序号 表面类型 曲率半径 厚度 材料(nd) 材料(vd) 半直径
1 球面 21.301 3.423 1.67 54.8 6.70
2 球面 -22.372 0.800 2.00 29.1 6.70
3 球面 -48.585 变焦间隔1     6.70
4 球面 121.885 0.800 1.70 55.5 4.61
5 球面 14.843 1.340     4.61
6 球面 -13.504 1.014 1.99 16.5 4.06
7 球面 -10.175 0.800 1.79 47.5 4.06
8 球面 622.629 变焦间隔2     4.06
9 非球面 9.349 1.943 1.50 81.6 3.72
10 非球面 -14.539 -0.400     3.72
光阑 平面 无限 1.369     3.50
12 球面 8.927 3.001 1.64 55.4 3.40
13 球面 -17.006 3.001 1.85 32.2 3.40
14 球面 5.206 变焦间隔3     3.40
15 非球面 11.068 1.825 1.70 20.0 2.57
16 非球面 9.041 0.800     2.57
17 非球面 13.232 2.728 1.55 25.2 2.98
18 非球面 -29.881 2.000     2.98
19 平面 无限 0.300 1.52 64.2 6.00
20 平面 无限 3.227     6.00
21 像面 无限       4.00
其中，面序号1表示第一透镜101的前表面(靠近物方一侧的表面)，面序号2表示第一透镜101的后表面(靠近像方一侧的表面)，依次类推，其中，面序号2为第一透镜101与第二透镜102的胶合面；面序号7为第四透镜202和第五透镜203的胶合面；面序号13为第七透镜302和第八透镜303的胶合面；面序号19和20分别表示镜头保护玻璃的前表面和后表面。曲率半径表示透镜表面的弯曲程度，正值表示该表面弯向像面一侧，负值表示该表面弯向物面一侧，其中“无限”表示该表面为平面，曲率半径为无穷大；厚度表示当前表面到下一表面的中心轴向距离，折射率nd(d表示面序号)表示当前表面到下一表面之间的材料对光线的偏折能力，色散系数vd(d表示面序号)表示当前表面到下一表面之间的材料对光线的色散特性，半直径表示表面类型对应为球面、非球面、平面或像面的半直径。
表15为表14中变焦间隔值：
表15变焦间隔的一种设计值
  广角端 长焦端
变焦间隔1 1.499 7.543
变焦间隔2 15.534 0.499
变焦间隔3 0.999 9.990
表16图25和图26中变焦镜头中非球面面型参数：
表16定焦镜头中非球面系数的一种设计值
面序号 k a 2 a 3 a 4 a 5
9 0.065 -1.656732E-04 -4.301799E-06 2.383421E-07 -1.260553E-08
10 2.214 2.224393E-04 -2.843998E-06 2.462445E-07 -1.190543E-08
15 5.222 -2.053590E-03 -7.522020E-05 1.037533E-05 -4.362379E-07
16 3.151 -1.773781E-03 -2.220938E-04 1.916678E-05 -6.769778E-07
17 -22.080 4.742748E-03 -2.638869E-04 1.302878E-05 -3.089024E-07
18 18.511 3.397084E-03 4.041001E-05 -2.238971E-07 -9.233430E-08
其中，上述表16中采用的是科学计数法，示例性的，-1.656732E-04表示面序号9的a2系数为-1.656732×10 -4。
图27为本实施例中一种变焦镜头的广角端球差曲线图，图28为本实施例中一种变焦镜头的长焦端球差曲线图，图29为本实施例中一种变焦镜头广角端的光线光扇图，图30为本实施例中一种变焦镜头长焦端的光线光扇图，图31为本实施例中一种变焦镜头广角端的场曲畸变图，图32为本实施例中一种变焦镜头长焦端的场曲畸变图，由图27～图32可知，本申请实施例提供的变焦镜头具有良好的成像能力。

Claims (10)

  1. 一种变焦镜头，包括沿光轴从物方到像方依次排列的正光焦度的第一透镜组、负光焦度的第二透镜组、正光焦度的第三透镜组和正光焦度的第四透镜组，所述第二透镜组和所述第三透镜组在变焦时沿所述光轴往复移动；
    其中，所述第一透镜组包括第一透镜和第二透镜，所述第二透镜组包括第三透镜、第四透镜和第五透镜，所述第三透镜组包括第六透镜、第七透镜和第八透镜，所述第四透镜组包括第九透镜和第十透镜；
    所述变焦镜头还包括光阑，所述光阑位于所述第六透镜和所述第七透镜之间。
  2. 根据权利要求1所述的变焦镜头，其中，所述第一透镜具有正光焦度，所述第二透镜具有负光焦度，所述第三透镜具有负光焦度，所述第四透镜具有正光焦度，所述第五透镜具有负光焦度，所述第六透镜具有正光焦度，所述第七透镜具有正光焦度，所述第八透镜具有负光焦度，所述第九透镜具有正光焦度或负光焦度，所述第十透镜具有正光焦度。
  3. 根据权利要求1所述的变焦镜头，其中，所述第一透镜为双凸球面透镜，所述第二透镜为凹凸球面透镜，所述第三透镜为凸凹球面透镜，所述第四透镜为凹凸球面透镜，所述第五透镜为双凹球面透镜，所述第六透镜为双凸非球面透镜，所述第七透镜为双凸球面透镜，所述第八透镜为双凹球面透镜，所述第九透镜为凹凸或凸凹非球面透镜，所述第十透镜为凸凹非球面透镜。
  4. 根据权利要求1所述的变焦镜头，其中，所述第一透镜和所述第二透镜构成胶合透镜，所述第四透镜和第五透镜构成胶合透镜，所述第七透镜和所述第八透镜构成胶合透镜，所述变焦镜头的光焦度满足：
    Figure PCTCN2022139895-appb-100001
    Figure PCTCN2022139895-appb-100002
    Figure PCTCN2022139895-appb-100003
    其中，
    Figure PCTCN2022139895-appb-100004
    和
    Figure PCTCN2022139895-appb-100005
    分别表示所述第一透镜与所述第二透镜胶合后的光焦度、所述第四透镜与所述第五透镜胶合后的光焦度、所述第七透镜与第八透镜胶合后的光焦度，
    Figure PCTCN2022139895-appb-100006
    表示所述变焦镜头在广角端的光焦度。
  5. 根据权利要求1所述的变焦镜头，其中，所述第一透镜至所述第十透镜的光焦度满足：
    Figure PCTCN2022139895-appb-100007
    Figure PCTCN2022139895-appb-100008
    Figure PCTCN2022139895-appb-100009
    Figure PCTCN2022139895-appb-100010
    Figure PCTCN2022139895-appb-100011
    Figure PCTCN2022139895-appb-100012
    Figure PCTCN2022139895-appb-100013
    Figure PCTCN2022139895-appb-100014
    Figure PCTCN2022139895-appb-100015
    Figure PCTCN2022139895-appb-100016
    其中，
    Figure PCTCN2022139895-appb-100017
    和
    Figure PCTCN2022139895-appb-100018
    分别表示所述第一透镜至所述第十透镜的光焦度，
    Figure PCTCN2022139895-appb-100019
    表示所述变焦镜头在广角端的光焦度，
    Figure PCTCN2022139895-appb-100020
    为表示所述第二透镜组的光焦度，
    Figure PCTCN2022139895-appb-100021
    表示所述第三透镜组的光焦度。
  6. 根据权利要求1所述的变焦镜头，其中，所述第一透镜至所述第十透镜的折射率和色散系数满足：
    1.57≤n1≤1.77；41.8≤v1≤61.8；
    1.90≤n2≤2.10；20.0≤v2≤39.1；
    1.60≤n3≤1.80；45.5≤v3≤65.5；
    1.89≤n4≤2.09；15.5≤v4≤26.5；
    1.69≤n5≤1.89；37.5≤v5≤57.5；
    1.40≤n6≤1.60；71.6≤v6≤91.6；
    1.54≤n7≤1.74；45.4≤v7≤65.5；
    1.75≤n8≤1.95；22.2≤v8≤42.2；
    1.40≤n9≤1.80；15.0≤v9≤47.4；
    1.39≤n10≤1.65；15.2≤v10≤39.5；
    其中，n1、n2、n3、n4、n5、n6、n7、n8、n9和n10分别表示所述第一透镜至所述第十透镜的折射率，v1、v2、v3、v4、v5、v6、v7、v8、v9和v10分别表示所述第一透镜至所述第十透镜的色散系数。
  7. 根据权利要求1所述的变焦镜头，其中，所述第二透镜组从广角端到长焦端的位移量G2_L、所述第三透镜组从广角端到长焦端的位移量G3_L和广角端的镜头总长TTL_W满足：
    0.08≤G2_L/TTL_W≤0.20；
    0.26≤G3_L/TTL_W≤0.39。
  8. 根据权利要求1所述的变焦镜头，其中，所述变焦镜头的像面直径IC与所述变焦镜头在广角端的焦距F_W满足：
    F_W/IC≤1.50。
  9. 根据权利要求1所述的变焦镜头，其中，所述变焦镜头在广角端的后焦BFL_W与在广角端的镜头总长TTL_W满足：
    BFL_W/TTL_W≥0.08；
    所述第一透镜的直径D1与在广角端的镜头总长TTL_W满足：
    D1/TTL_W＜0.18。
  10. 根据权利要求1所述的变焦镜头，其中，所述变焦镜头在广角端的光焦度
    Figure PCTCN2022139895-appb-100022
    和在长焦端的光焦度
    Figure PCTCN2022139895-appb-100023
    满足：
    Figure PCTCN2022139895-appb-100024
PCT/CN2022/139895 2021-12-22 2022-12-19 变焦镜头 WO2023116600A1 (zh)

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