WO2021109042A1 - Optical system and photographing apparatus - Google Patents

Optical system and photographing apparatus Download PDF

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Publication number
WO2021109042A1
WO2021109042A1 PCT/CN2019/123117 CN2019123117W WO2021109042A1 WO 2021109042 A1 WO2021109042 A1 WO 2021109042A1 CN 2019123117 W CN2019123117 W CN 2019123117W WO 2021109042 A1 WO2021109042 A1 WO 2021109042A1
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lens
lens group
optical system
group
photographing device
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PCT/CN2019/123117
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French (fr)
Chinese (zh)
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甘汝婷
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深圳市大疆创新科技有限公司
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Priority to CN201980067392.4A priority Critical patent/CN112955803A/en
Priority to PCT/CN2019/123117 priority patent/WO2021109042A1/en
Publication of WO2021109042A1 publication Critical patent/WO2021109042A1/en

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
    • G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
    • G02B13/0045—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having five or more lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G02B13/0055—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element
    • G02B13/006—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element at least one element being a compound optical element, e.g. cemented elements
    • 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
    • G02B15/00—Optical objectives with means for varying the magnification
    • 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
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B9/00—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or -

Definitions

  • the surface numbers 1, 2,..., 16 in the table represent the surface numbers in the optical system, respectively representing the first lens 11 (surface numbers 1, 2) and the first lens Two lens 12 (face number 3, 4), stop 4 (represented as stop, face number 5), third lens 21 and fourth lens 22 (combined as a doublet lens, faces 6, 7, 8
  • the cemented surface of the two lenses is counted as one surface 7,), the fifth lens 23 (faces 9, 10), the sixth lens 24 (faces 11, 12), the seventh lens 31 (faces 13, 14), and the Mirror surface with eight lenses 32 (face numbers 15, 16).
  • the second lens group includes at least a set of double cemented lenses.

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

Abstract

An optical system and a photographing apparatus. The optical system (10) comprises: a first lens group (1), a second lens group (2), and a third lens group (3) which are arranged in sequence from an object side to an image side, the first lens group (1) and the second lens group (2) both having positive focal power, and the third lens group (3) having negative focal power. The optical system (10) satisfies: 0.85<|f1/f|<4.5, 0.5<|f2/f|<1.5, 3<|f3/f|<10, 1<|TL/f|<1.5, 0<|T1/T2|<0.5, 0<|T3/T2|<0.5, wherein f, f1, f2, and f3 are focal lengths, and TL, T1, T2, and T3 are distances between the lens groups, a diagram, and an imaging plane.

Description

光学***及拍摄装置Optical system and shooting device 技术领域Technical field
本申请涉及光学技术领域，尤其涉及一种光学***及拍摄装置。This application relates to the field of optical technology, and in particular to an optical system and a photographing device.
背景技术Background technique
随着物质生活水平的提高，人们对于摄影相机摄像的需求逐渐提高，而单反相机标准的定焦镜头一直备受摄影爱好者和专业摄影家追捧，现有的定焦镜头大多采用双高斯光学结构，镜头光学***长度比较长，且重量较重，体积较大，对焦速度较慢，而且价格较贵、成像面较小、成像质量较差等问题，并且现有的高端中画幅镜头大多成本较高。With the improvement of material living standards, people's demand for photography cameras has gradually increased. The standard fixed-focus lenses of SLR cameras have been sought after by photography enthusiasts and professional photographers. Most of the existing fixed-focus lenses adopt double Gauss optical structure. , The lens optical system is relatively long, heavy, bulky, slower focusing speed, more expensive, smaller imaging area, poor imaging quality, etc., and most of the existing high-end medium format lenses cost more high.
发明内容Summary of the invention
基于此，本申请提供一种光学***及拍摄装置。Based on this, the present application provides an optical system and a photographing device.
第一方面，本申请提供了一种光学***，包括从物侧至像侧依次设置的第一透镜组、第二透镜组和第三透镜组，所述第一透镜组和所述第二透镜组均具有正光焦度，所述第三透镜组具有负光焦度；In a first aspect, the present application provides an optical system including a first lens group, a second lens group, and a third lens group arranged in order from the object side to the image side, the first lens group and the second lens All groups have positive refractive power, and the third lens group has negative refractive power;
所述光学***满足以下条件：0.85<|f 1/f|<4.5，0.5<|f 2/f|<1.5，3<|f 3/f|<10，1<|TL/f|<1.5，0<|T 1/T 2|<0.5，0<|T 3/T 2|<0.5，其中f 1、f 2、f 3分别表示第一透镜组、第二透镜组、第三透镜组的焦距，f表示无限远对焦时光学***的焦距，TL表示所述第一透镜组的最靠近物侧的透镜面中心顶点到成像面为止的光轴上的距离，T 1表示所述第一透镜组的最靠近物侧的透镜面中心顶点到光阑的距离，T 2表示光阑面到所述第三透镜组最靠近物侧的透镜面中心顶点的距离，T 3表示所述第三透镜组中最靠近物侧的透镜面中心顶点到所述第三透镜组中最靠近像侧的透镜面顶点的距离。 The optical system satisfies the following conditions: 0.85<|f 1 /f|<4.5, 0.5 <|f 2 /f|<1.5, 3<|f 3 / f|<10, 1 <|TL/f|<1.5 , 0<|T 1 /T 2 |<0.5 , 0<|T 3 /T 2 |<0.5, where f 1 , f 2 , and f 3 represent the first lens group, the second lens group, and the third lens group, respectively F represents the focal length of the optical system when focusing at infinity, TL represents the distance on the optical axis from the center vertex of the lens surface closest to the object side of the first lens group to the imaging surface, and T 1 represents the first lens The distance from the center vertex of the lens surface closest to the object side of the lens group to the diaphragm, T 2 represents the distance from the diaphragm surface to the center vertex of the lens surface closest to the object side of the third lens group, and T 3 represents the third The distance from the center vertex of the lens surface closest to the object side in the lens group to the vertex of the lens surface closest to the image side in the third lens group.
第二方面，本申请提供了一种拍摄装置，所述拍摄装置包括光学***和拍 摄设备，所述光学***连接于所述拍摄设备，所述光学***包括从物侧至像侧依次设置的第一透镜组、第二透镜组和第三透镜组，所述第一透镜组和所述第二透镜组均具有正光焦度，所述第三透镜组具有负光焦度；In a second aspect, the present application provides a photographing device, the photographing device includes an optical system and a photographing device, the optical system is connected to the photographing device, and the optical system includes a second lens arranged in order from the object side to the image side. A lens group, a second lens group and a third lens group, the first lens group and the second lens group both have positive refractive power, and the third lens group has negative refractive power;
所述光学***满足以下条件：0.85<|f 1/f|<4.5，0.5<|f 2/f|<1.5，3<|f 3/f|<10，1<|TL/f|<1.5，0<|T 1/T 2|<0.5，0<|T 3/T 2|<0.5，其中f 1、f 2、f 3分别表示第一透镜组、第二透镜组、第三透镜组的焦距，f表示无限远对焦时光学***的焦距，TL表示所述第一透镜组的最靠近物侧的透镜面中心顶点到成像面为止的光轴上的距离，T 1表示所述第一透镜组的最靠近物侧的透镜面中心顶点到光阑的距离，T 2表示光阑面到所述第三透镜组最靠近物侧的透镜面中心顶点的距离，T 3表示所述第三透镜组中最靠近物侧的透镜面中心顶点到所述第三透镜组中最靠近像侧的透镜面顶点的距离。 The optical system satisfies the following conditions: 0.85<|f 1 /f|<4.5, 0.5 <|f 2 /f|<1.5, 3<|f 3 / f|<10, 1 <|TL/f|<1.5 , 0<|T 1 /T 2 |<0.5 , 0<|T 3 /T 2 |<0.5, where f 1 , f 2 , and f 3 represent the first lens group, the second lens group, and the third lens group, respectively F represents the focal length of the optical system when focusing at infinity, TL represents the distance on the optical axis from the center vertex of the lens surface closest to the object side of the first lens group to the imaging surface, and T 1 represents the first lens The distance from the center vertex of the lens surface closest to the object side of the lens group to the diaphragm, T 2 represents the distance from the diaphragm surface to the center vertex of the lens surface closest to the object side of the third lens group, and T 3 represents the distance from the center vertex of the lens surface closest to the object side of the third lens group. The distance from the center vertex of the lens surface closest to the object side in the lens group to the vertex of the lens surface closest to the image side in the third lens group.
本申请实施例提供了一种光学***及拍摄装置，光学***包括从物侧至像侧依次设置的第一透镜组、第二透镜组和第三透镜组，所述第一透镜组和所述第二透镜组均具有正光焦度，所述第三透镜组具有负光焦度；所述光学***满足以下条件：0.85<|f 1/f|<4.5，0.5<|f 2/f|<1.5，3<|f 3/f|<10，1<|TL/f|<1.5，0<|T 1/T 2|<0.5，0<|T 3/T 2|<0.5，其中f 1、f 2、f 3分别表示第一透镜组、第二透镜组、第三透镜组的焦距，f表示无限远对焦时光学***的焦距，TL表示所述第一透镜组的最靠近物侧的透镜面中心顶点到成像面为止的光轴上的距离，T 1表示所述第一透镜组的最靠近物侧的透镜面中心顶点到光阑的距离，T 2表示光阑面到所述第三透镜组最靠近物侧的透镜面中心顶点的距离，T 3表示所述第三透镜组中最靠近物侧的透镜面中心顶点到所述第三透镜组中最靠近像侧的透镜面顶点的距离。该光学***结构的组合，能够减小光学***的整体像差，为保证成像质量提供支持；能够使整体的长度较短，为减小体积(小型化)提供支持，因为整体的长度较短通常可能要求减少透镜数量，从而能够为减小重量(轻型化)提供支持，当透镜数量减少时，采用的对焦的透镜数量也可能减少，从而能够为提高对焦速度提供支持，且内对焦结构能够为减小呼吸效应提供支持；能够实现即使边缘视场也能较清晰地成像。 The embodiments of the present application provide an optical system and a photographing device. The optical system includes a first lens group, a second lens group, and a third lens group arranged in sequence from the object side to the image side. The first lens group and the The second lens group has positive refractive power, and the third lens group has negative refractive power; the optical system satisfies the following conditions: 0.85<|f 1 /f|<4.5, 0.5 <|f 2 /f|< 1.5,3 <| f 3 /f|<10,1<|TL/f|<1.5,0<|T 1 / T 2 | <0.5,0 <| T 3 / T 2 | <0.5, wherein f 1 , F 2 , f 3 represent the focal lengths of the first lens group, the second lens group, and the third lens group, respectively, f represents the focal length of the optical system when focusing at infinity, and TL represents the closest object side of the first lens group The distance from the center vertex of the lens surface to the imaging surface on the optical axis, T 1 represents the distance from the center vertex of the lens surface closest to the object side of the first lens group to the diaphragm, and T 2 represents the distance from the diaphragm surface to the first lens group. The distance from the center vertex of the lens surface of the three lens group closest to the object side, T 3 represents the center vertex of the lens surface closest to the object side in the third lens group to the lens surface vertex closest to the image side in the third lens group distance. The combination of the optical system structure can reduce the overall aberration of the optical system and provide support for ensuring the imaging quality; it can make the overall length shorter and provide support for reducing the size (miniaturization), because the overall length is usually short It may be required to reduce the number of lenses, so as to provide support for weight reduction (lightweight). When the number of lenses is reduced, the number of focusing lenses used may also be reduced, which can provide support for increasing the focusing speed, and the internal focusing structure can be Reducing the breathing effect provides support; it can achieve clear imaging even at the edge of the field of view.
应当理解的是，以上的一般描述和后文的细节描述仅是示例性和解释性的，并不能限制本申请。It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the application.
附图说明Description of the drawings
为了更清楚地说明本申请实施例技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。In order to explain the technical solutions of the embodiments of the present application more clearly, the following will briefly introduce the drawings used in the description of the embodiments. Obviously, the drawings in the following description are some embodiments of the present application. Ordinary technicians can obtain other drawings based on these drawings without creative work.
图1是本申请光学***一实施例的结构示意图；Fig. 1 is a schematic structural diagram of an embodiment of an optical system of the present application;
图2是本申请光学***另一实施例的结构示意图；2 is a schematic structural diagram of another embodiment of the optical system of the present application;
图3是本申请光学***又一实施例的结构示意图；FIG. 3 is a schematic structural diagram of another embodiment of the optical system of the present application;
图4是本申请拍摄装置一实施例的结构示意图。FIG. 4 is a schematic structural diagram of an embodiment of a photographing device of the present application.
主要元件及符号说明：Description of main components and symbols:
10、光学***；10. Optical system;
1、第一透镜组；2、第二透镜组；3、第三透镜组；4、光阑；5、成像面；1. The first lens group; 2. The second lens group; 3. The third lens group; 4. The diaphragm; 5. The imaging surface;
11、第一透镜；12、第二透镜；21、第三透镜；22、第四透镜；23、第五透镜；24、第六透镜；31、第七透镜；32、第八透镜；11. The first lens; 12, the second lens; 21, the third lens; 22, the fourth lens; 23, the fifth lens; 24, the sixth lens; 31, the seventh lens; 32, the eighth lens;
40、拍摄装置；41、拍摄设备。40. Shooting device; 41. Shooting equipment.
具体实施方式Detailed ways
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。The technical solutions in the embodiments of the present application will be described clearly and completely in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of them. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of this application.
下面结合附图，对本申请的一些实施方式作详细说明。在不冲突的情况下，下述的实施例及实施例中的特征可以相互组合。Hereinafter, some embodiments of the present application will be described in detail with reference to the accompanying drawings. In the case of no conflict, the following embodiments and features in the embodiments can be combined with each other.
参见图1，图1是本申请光学***一实施例的结构示意图。该光学***10包括沿光轴Z从物侧(左边，即物方)至像侧(右边，即像方)依次设置的第一透镜组1、第二透镜组2和第三透镜组3，第一透镜组1和第二透镜组2均 具有正光焦度，第三透镜组3具有负光焦度。Refer to FIG. 1, which is a schematic structural diagram of an embodiment of the optical system of the present application. The optical system 10 includes a first lens group 1, a second lens group 2 and a third lens group 3 arranged in order from the object side (left side, that is, the object side) to the image side (right side, that is, the image side) along the optical axis Z, Both the first lens group 1 and the second lens group 2 have positive refractive power, and the third lens group 3 has negative refractive power.
光焦度(focal power)等于像方光束会聚度与物方光束会聚度之差，它表征光学***偏折光线的能力，常用字母φ表示，其单位为屈光度(Diopter)。当入射光束为平行光束时，光焦度表征光学***对入射平行光束的屈折能力；φ的数值越大，平行光束屈折得越厉害；φ>0时，屈折是会聚性的；φ<0时，屈折是发散性的；φ＝0时，为平面折射，即沿轴平行光束经折射后仍是沿轴平行光束，不出现屈折现象。The focal power is equal to the difference between the image-side beam convergence and the object-side beam convergence. It represents the ability of the optical system to deflect light. It is often represented by the letter φ, and its unit is Diopter. When the incident beam is a parallel beam, the optical power represents the refractive power of the optical system to the incident parallel beam; the larger the value of φ, the more the parallel beam is refracted; when φ>0, the refraction is convergent; when φ<0 , Refraction is divergent; when φ=0, it is plane refraction, that is, the parallel beam along the axis is refracted, and the beam is parallel along the axis without refraction.
该光学***10满足以下条件：0.85<|f 1/f|<4.5，0.5<|f 2/f|<1.5，3<|f 3/f|<10，1<|TL/f|<1.5，0<|T 1/T 2|<0.5，0<|T 3/T 2|<0.5，其中f 1、f 2、f 3分别表示第一透镜组1、第二透镜组2、第三透镜组3的焦距，f表示无限远对焦时光学***10的焦距，TL表示第一透镜组1的最靠近物侧的透镜面中心顶点A到成像面5为止的光轴Z上的距离，T 1表示第一透镜组1的最靠近物侧的透镜面中心顶点A到光阑4的距离，T 2表示光阑面4到第三透镜组3最靠近物侧的透镜面中心顶点B的距离，T 3表示第三透镜组3中最靠近物侧的透镜面中心顶点B到第三透镜组3中最靠近像侧的透镜面中心顶点C的距离。 The optical system 10 satisfies the following conditions: 0.85<|f 1 /f|<4.5, 0.5 <|f 2 /f|<1.5, 3<|f 3 / f|<10, 1<|TL/f|<1.5 , 0<|T 1 /T 2 |<0.5 , 0<|T 3 /T 2 |<0.5, where f 1 , f 2 , f 3 represent the first lens group 1, the second lens group 2, and the third lens group respectively The focal length of the lens group 3, f represents the focal length of the optical system 10 when focusing at infinity, TL represents the distance on the optical axis Z from the center vertex A of the lens surface closest to the object side of the first lens group 1 to the imaging surface 5, and T 1 represents the distance from the center vertex A of the lens surface closest to the object side of the first lens group 1 to the aperture 4, and T 2 represents the distance from the aperture surface 4 to the center vertex B of the lens surface closest to the object side of the third lens group 3 , T 3 represents the distance from the center vertex B of the lens surface closest to the object side in the third lens group 3 to the center vertex C of the lens surface closest to the image side in the third lens group 3.
上述光学***10，在对焦时，既可以采用第一透镜组1进行对焦，也可以采用第二透镜组2进行对焦，还可以采用第三透镜组3进行对焦。In the above-mentioned optical system 10, during focusing, the first lens group 1 may be used for focusing, the second lens group 2 may be used for focusing, or the third lens group 3 may be used for focusing.
上述光学***10中由于1<|TL/f|<1.5，能够有助于缩短整体的光学***的长度。T 1、T 2、T 3之间的关系0<|T 1/T 2|<0.5和0<|T 1/T 2/T 2|<0.5使得采用第二透镜组2进行对焦时有足够的对焦空间。 In the above-mentioned optical system 10, since 1<|TL/f|<1.5, it can contribute to shortening the length of the overall optical system. The relationship between T 1 , T 2 , T 3 0<|T 1 /T 2 |<0.5 and 0<|T 1 /T 2 /T 2 |<0.5 makes it sufficient when the second lens group 2 is used for focusing The focus space.
上述光学***10通过距离和间距的设计，可以将光学***10的结构设计得更为紧凑，由此进一步有助于整个光学***的小型化和轻便化，同时还可以提高光学***的成像质量。The above-mentioned optical system 10 can be designed to be more compact through the design of distance and spacing, thereby further contributing to the miniaturization and portability of the entire optical system, and at the same time improving the imaging quality of the optical system.
本申请实施例光学***10上述结构的组合，能够减小光学***10的整体像差，为保证成像质量提供支持；由于整体的长度较短通常可能要求减少透镜数量，从而能够为减小重量(轻型化)提供支持，当透镜数量减少时，采用的对焦的透镜数量也可能减少，从而能够为提高对焦速度提供支持，由于上述结构的组合为内对焦结构提供支持，内对焦结构能够为减小呼吸效应提供支持；能够实现即使边缘视场也能较清晰地成像。The combination of the above-mentioned structures of the optical system 10 of the embodiment of the present application can reduce the overall aberration of the optical system 10 and provide support for ensuring the imaging quality; because the overall length is relatively short, the number of lenses may usually be reduced, which can reduce the weight ( Lightweight) provides support. When the number of lenses is reduced, the number of focusing lenses used may also be reduced, which can provide support for improving the focusing speed. Because the combination of the above structures provides support for the internal focusing structure, the internal focusing structure can be reduced Breathing effect provides support; it can achieve clear imaging even at the edge of the field of view.
由于采用第二透镜组2进行对焦(即内对焦模式)时能够保持对焦***长度不变，在一实施例中，第一透镜组1和第三透镜组3相对于成像面5被固定的状态下，使得第二透镜组2沿着光轴Z从物侧向像侧移动，由此实现最近距离物体向无限远物体的对焦。Since the second lens group 2 is used for focusing (that is, the internal focus mode), the length of the focusing system can be kept unchanged. In one embodiment, the first lens group 1 and the third lens group 3 are fixed relative to the imaging surface 5 Next, the second lens group 2 is moved along the optical axis Z from the object side to the image side, thereby achieving focusing from the closest object to the infinity object.
其中，光学***10从物侧至像侧设有至少八片透镜，依次分别为第一透镜11、第二透镜12、第三透镜21、第四透镜22、第五透镜23、第六透镜24、第七透镜31、第八透镜32；第一透镜组1包括第一透镜11和第二透镜12，第二透镜组2包括第三透镜21、第四透镜22、第五透镜23和第六透镜24，第三透镜组3至少包括第七透镜31在内的一个以上的透镜。Among them, the optical system 10 is provided with at least eight lenses from the object side to the image side, which are the first lens 11, the second lens 12, the third lens 21, the fourth lens 22, the fifth lens 23, and the sixth lens 24 respectively. , The seventh lens 31, the eighth lens 32; the first lens group 1 includes a first lens 11 and a second lens 12, and the second lens group 2 includes a third lens 21, a fourth lens 22, a fifth lens 23 and a sixth lens The lens 24 and the third lens group 3 include at least one lens including the seventh lens 31.
由于本实施例的光学***10的透镜数量大于等于八片，相对于现有同类型及相近参数的单反相机定焦镜头的镜片数量(10片及以上)有所较少，通过这种方式能够减小重量，而且能够较低成本，从而能够使对应的镜头向轻型化发展；特别是当光学***10的透镜数量等于八片时，能够减少更多重量，进一步降低成本；而且第二透镜组4包括4个透镜，对焦的透镜数量减少很多，从而能够提高对焦速度。另外，由于采用第二透镜组2进行内对焦，对焦时移动的距离(对焦量)缩短，从而能够减小呼吸效应。Since the number of lenses of the optical system 10 of this embodiment is greater than or equal to eight, compared with the number of lenses (10 and more) of the existing SLR cameras of the same type and similar parameters, the number of lenses (10 or more) is less. The weight is reduced, and the cost can be lowered, so that the corresponding lens can be developed to be lighter; especially when the number of lenses in the optical system 10 is equal to eight, it can reduce more weight and further reduce the cost; and the second lens group 4 includes 4 lenses, the number of focusing lenses is reduced a lot, which can increase the focusing speed. In addition, since the second lens group 2 is used for internal focusing, the moving distance (focus amount) during focusing is shortened, so that the breathing effect can be reduced.
在一实施例中，第一透镜组1、第二透镜组2和第三透镜组3中至少一组包括塑胶透镜。即第一透镜组1、第二透镜组2和第三透镜组3可以部分采用玻璃透镜等常用材质透镜，部分采用塑胶透镜；或者均用塑胶透镜。通过这种方式能够进一步地减轻光学***10的重量，实现光学***10的轻量化，以方便用户使用。In an embodiment, at least one of the first lens group 1, the second lens group 2 and the third lens group 3 includes a plastic lens. That is, the first lens group 1, the second lens group 2 and the third lens group 3 may partly adopt common material lenses such as glass lenses and partly adopt plastic lenses; or all adopt plastic lenses. In this way, the weight of the optical system 10 can be further reduced, and the weight of the optical system 10 can be reduced, which is convenient for users to use.
在另一实施例中，第一透镜组1、第二透镜组2和第三透镜组3中所有镜片均为玻璃透镜。采用玻璃透镜，光学品质和成像效果更好。In another embodiment, all the lenses in the first lens group 1, the second lens group 2 and the third lens group 3 are glass lenses. Using glass lens, the optical quality and imaging effect are better.
非球面透镜是从中心到边缘之曲率连续发生变化的透镜，用以改进光学品质(例如避免产生球面像差、色差和畸变等等)，非球面透镜替换球面透镜，最显著的优势在于可以修正球面透镜在准直和聚焦***中所带来的球差。通过调整曲面常数和非球面系数，非球面透镜可以最大限度的消除球面像差。多片(两片以上)透镜组合可以实现的光学品质，往往一片或者两片非球面透镜就可以实现类似或更好的光学品质，采用非球面透镜能够减少光学元件，从而减 小***尺寸，能够降低***的综合成本，也便于加工。本实施例的光学***包括非球面透镜，下面说明本实施例的光学***有关非球面透镜的内容。An aspheric lens is a lens whose curvature continuously changes from center to edge to improve optical quality (such as avoiding spherical aberration, chromatic aberration, and distortion, etc.). Aspheric lenses replace spherical lenses. The most significant advantage is that they can be corrected. The spherical aberration caused by the spherical lens in the collimation and focusing system. By adjusting the surface constant and the aspheric coefficient, the aspheric lens can eliminate the spherical aberration to the greatest extent. The optical quality that can be achieved by a combination of multiple (more than two) lenses, often one or two aspheric lenses can achieve similar or better optical quality. The use of aspheric lenses can reduce optical components, thereby reducing the size of the system. The overall cost of the system is reduced, and the processing is also convenient. The optical system of this embodiment includes an aspheric lens. The following describes the content of the optical system of this embodiment related to the aspheric lens.
在一实施例中，第一透镜组1和第二透镜组2至少包含一面非球面透镜。In one embodiment, the first lens group 1 and the second lens group 2 include at least one aspheric lens.
第一种情况：第一透镜组1至少包含一面非球面透镜。第一透镜组1的第二透镜12为非球面透镜。第二透镜12至少有一面是非球面。The first case: the first lens group 1 includes at least one aspheric lens. The second lens 12 of the first lens group 1 is an aspheric lens. At least one surface of the second lens 12 is aspherical.
第二种情况：第二透镜组2至少包含一面非球面透镜。第二透镜组2至少包含一片非球面透镜。第二透镜组2至少包含的一片非球面透镜至少有一面是非球面。The second case: the second lens group 2 includes at least one aspheric lens. The second lens group 2 includes at least one aspheric lens. At least one aspheric lens included in the second lens group 2 has at least one aspheric surface.
第三种情况：第一透镜组1和第二透镜组2包含两片非球面透镜。两片非球面透镜的非球面表面是高次非球面。高次非球面满足以下表达式：The third case: the first lens group 1 and the second lens group 2 include two aspheric lenses. The aspheric surface of the two aspheric lenses is a high-order aspheric surface. The high-order aspheric surface satisfies the following expression:
Figure PCTCN2019123117-appb-000001
Figure PCTCN2019123117-appb-000001
其中，z为非球面旋转对称轴，c为顶点曲率；y为径向坐标，其单位和透镜单位长度相同；k为二次曲线常数，a 1至a 8分别表示各径向坐标所对应的系数。 Among them, z is the aspheric rotational symmetry axis, c is the curvature of the vertex; y is the radial coordinate, and its unit is the same as the unit length of the lens; k is the conic constant, and a 1 to a 8 respectively represent the corresponding radial coordinates coefficient.
在一实施例中，非球面透镜的非球面设置在口径较小的透镜面。通过这种方式，能够在较好地矫正光学***像差的同时，又有利于降低镜片的加工成本。In one embodiment, the aspheric surface of the aspheric lens is arranged on the lens surface with a smaller aperture. In this way, it is possible to better correct the aberrations of the optical system and at the same time help reduce the processing cost of the lens.
下面详细说明第一透镜组1的具体细节内容。The specific details of the first lens group 1 will be described in detail below.
在一实施例中，为了提高成像质量，第一透镜11为负透镜，且满足以下条件：0.5<|f 11/f|<2.5，0<|f 12/f 11|<1，其中f 11表示第一透镜组1的第一透镜11的焦距，f 12表示第一透镜组1的第二透镜12的焦距。 In one embodiment, in order to improve the imaging quality, the first lens 11 is a negative lens, and meets the following conditions: 0.5<|f 11 /f|<2.5, 0 <|f 12 /f 11 |<1, where f 11 Represents the focal length of the first lens 11 of the first lens group 1, and f 12 represents the focal length of the second lens 12 of the first lens group 1.
负透镜又叫凹透镜，镜片的中间薄，边缘厚，呈凹形；凹透镜对光有发散作用，例如双凹透镜、平凹透镜、凸凹透镜等形式。在本实施例中第一透镜11为负透镜，其作用是为了使入射光线更加顺滑，没有特别大的转折。第一透镜11和第二透镜12组成的第一透镜组1具有正光焦度。由于0.5<|f 11/f|<2.5，0<|f 12/f 11|<1，能够使光学***10拥有较好的像质。 Negative lens is also called concave lens, the middle of the lens is thin, the edge is thick, and it is concave; the concave lens has a divergent effect on light, such as double-concave lens, plano-concave lens, convex-concave lens and other forms. In this embodiment, the first lens 11 is a negative lens, and its function is to make the incident light more smooth, without a particularly large turning. The first lens group 1 composed of the first lens 11 and the second lens 12 has positive refractive power. Since 0.5<|f 11 /f|<2.5, 0 <|f 12 /f 11 |<1, the optical system 10 can have better image quality.
在一实施例中，为了进一步缩短光学***10的长度，将光阑4设置在比较靠前的位置，尽可能靠近物侧，即第一透镜组1的第一透镜11和第二透镜12均设置在物侧和光阑4之间，第一透镜11和第二透镜12均设置在光阑4 之前。In one embodiment, in order to further shorten the length of the optical system 10, the diaphragm 4 is set at a relatively forward position, as close to the object side as possible, that is, the first lens 11 and the second lens 12 of the first lens group 1 are both It is arranged between the object side and the diaphragm 4, and the first lens 11 and the second lens 12 are both arranged in front of the diaphragm 4.
在一实施例中，为了提高成像质量，第一透镜组1满足以下条件：(vd 11，vd 12)>40，1.4<nd 11<1.6，1.5<nd 12<2；其中vd 11、vd 12分别表示第一透镜11、第二透镜12的色散系数；nd 11、nd 12分别表示第一透镜11、第二透镜12的折射率。 In one embodiment, in order to improve the imaging quality, the first lens group 1 meets the following conditions: (vd 11 , vd 12 )>40, 1.4<nd 11 <1.6, 1.5<nd 12 <2; where vd 11 , vd 12 Denote the dispersion coefficients of the first lens 11 and the second lens 12 respectively; nd 11 and nd 12 denote the refractive indices of the first lens 11 and the second lens 12 respectively.
下面详细说明第一透镜组2的具体细节内容。The specific details of the first lens group 2 are described in detail below.
在一实施例中，为了使内对焦的光学***能够较好地实现无限远到最近距离的对焦，保证在无限远和最近距离对焦的情况下都有较好的成像效果，拥有比较好的像质，第二透镜组2由四片单透镜组成，且至少包含一片以上的正透镜和一片以上的负透镜。第二透镜组2至少包括一组双胶合透镜。第二透镜组2的第三透镜21和第四透镜22为双胶合透镜20，第二透镜组2的第五透镜23和第六透镜24分别为单透镜。第二透镜组2满足以下条件：0<|f 20/f 2|<1，0.25<|f 23/f 2|<2.5，0<|f 24/f 2|<1，其中f 20表示第二透镜组2中双胶合透镜20的整体焦距，f 23表示第二透镜组2中第五透镜23的焦距，f 24表示第二透镜组2中第六透镜24的焦距。 In one embodiment, in order to enable the internal focusing optical system to better achieve focusing from infinity to the shortest distance, it is ensured that both infinity and shortest distance focusing have a better imaging effect and a better image. Quality, the second lens group 2 is composed of four single lenses, and at least includes more than one positive lens and more than one negative lens. The second lens group 2 includes at least one set of doublet lenses. The third lens 21 and the fourth lens 22 of the second lens group 2 are double cemented lenses 20, and the fifth lens 23 and the sixth lens 24 of the second lens group 2 are single lenses, respectively. The second lens group 2 satisfies the following conditions: 0<|f 20 /f 2 |<1, 0.25<|f 23 /f 2 |<2.5, 0<|f 24 /f 2 |<1, where f 20 represents the first The overall focal length of the doublet lens 20 in the two lens group 2, f 23 represents the focal length of the fifth lens 23 in the second lens group 2, and f 24 represents the focal length of the sixth lens 24 in the second lens group 2.
在一实施例中，为了提高成像质量，第二透镜组2满足以下条件：(vd 21，vd 23，vd 24)>40，0<vd 22<40，1.4<nd 24<1.6，1.5<(nd 21，nd 22，nd 23)<2；其中vd 21、vd 22、vd 23、vd 24分别表示第三透镜21、第四透镜22、第五透镜23、第六透镜24的色散系数；nd 21、nd 22、nd 23、nd 24分别表示第三透镜21、第四透镜22、第五透镜23、第六透镜24的折射率。进一步，第二透镜组2满足以下条件：0<vd 22<35，nd 22>1.6，vd 24>81，nd 24<1.5。 In one embodiment, in order to improve the imaging quality, the second lens group 2 satisfies the following conditions: (vd 21 , vd 23 , vd 24 )>40, 0<vd 22 <40, 1.4<nd 24 <1.6, 1.5<( nd 21 , nd 22 , nd 23 )<2; where vd 21 , vd 22 , vd 23 , and vd 24 represent the dispersion coefficients of the third lens 21, the fourth lens 22, the fifth lens 23, and the sixth lens 24 respectively; nd 21 , nd 22 , nd 23 , and nd 24 represent the refractive indexes of the third lens 21, the fourth lens 22, the fifth lens 23, and the sixth lens 24, respectively. Further, the second lens group 2 satisfies the following conditions: 0<vd 22 <35, nd 22 >1.6, vd 24 >81, and nd 24 <1.5.
采用内对焦方式的光学***中第二透镜组2作为内对焦组，至少包含一片超低色散的镜片(第四透镜22)和一片超高色散的镜片(第六透镜24)，且再包含至少一面非球面，该内对焦组正负透镜及非球面的使用，能够很好地控制内对焦组移动过程中引起的像差，从而能够提升整体***的光学像质；并且使得整体的对焦量(即从无限远物距到最近距离对焦时内对焦组移动的距离)较小(例如：对焦量可以小于3mm)，呼吸效应较弱(例如：可以小于10％)。In the optical system using the internal focusing method, the second lens group 2 is used as the internal focusing group, including at least one ultra-low dispersion lens (fourth lens 22) and one ultra-high dispersion lens (sixth lens 24), and at least An aspheric surface. The use of the positive and negative lenses of the inner focus group and the aspheric surface can well control the aberrations caused by the movement of the inner focus group, thereby improving the optical image quality of the overall system; and making the overall focus amount ( That is, the moving distance of the inner focus group when focusing from the infinite object distance to the closest distance) is small (for example, the focus amount can be less than 3 mm), and the breathing effect is weak (for example, it can be less than 10%).
下面详细说明第三透镜组3的具体细节内容。The specific details of the third lens group 3 will be described in detail below.
在一实施例中，第三透镜组3还包括第八透镜。In an embodiment, the third lens group 3 further includes an eighth lens.
为了提高成像质量，第三透镜组3至少包括一片正透镜和一片负透镜，且满足以下条件：0<|f 31/f 3|<0.5，0<|f 32/f 3|<0.5，其中f 31表示第三透镜组3中第七透镜31的焦距，f 32表示第三透镜组3中第八透镜32的焦距。 In order to improve the image quality, the third lens group 3 including at least one positive lens and one negative lens, and satisfies the following condition: 0 <| f 31 / f 3 | <0.5,0 <| f 32 / f 3 | <0.5, wherein f 31 represents the focal length of the seventh lens 31 in the third lens group 3, and f 32 represents the focal length of the eighth lens 32 in the third lens group 3.
其中，第三透镜组中第七透镜和第八透镜的像侧面均弯向物侧。这样能够为传感器(sensor)与卡口之间的连接节省一定的空间。Wherein, the image side surfaces of the seventh lens and the eighth lens in the third lens group are both bent toward the object side. This can save a certain amount of space for the connection between the sensor and the bayonet.
在一实施例中，为了提高成像质量，第三透镜组3满足以下条件：0<vd 32<40，30<vd 31<60，1.5<(nd 31，nd 32)<2；其中vd 31、vd 32分别表示第七透镜31、第八透镜32的色散系数；nd 31、nd 32分别表示第七透镜31、第八透镜32的折射率。进一步，第三透镜组3满足以下条件：0<vd 32<35，nd 32>1.85。 In one embodiment, in order to improve the imaging quality, the third lens group 3 satisfies the following conditions: 0<vd 32 <40, 30 <vd 31 <60, 1.5<(nd 31 , nd 32 )<2; where vd 31 , vd 32 represents the dispersion coefficients of the seventh lens 31 and the eighth lens 32 respectively; nd 31 and nd 32 represent the refractive indexes of the seventh lens 31 and the eighth lens 32 respectively. Further, the third lens group 3 satisfies the following conditions: 0<vd 32 <35, nd 32 >1.85.
需要说明的是，内对焦组可以由一片镜片对焦，也可以由其中几片对焦，不仅仅是第二透镜组2对焦，也可以是第一透镜组1中的第二透镜12对焦，也可以是第三透镜组3中的第七透镜31或者第八透镜32对焦，也可以是第三透镜组3中的第七透镜31、第八透镜32作为一组对焦。It should be noted that the inner focusing group can be focused by one lens or by several of them. Not only the second lens group 2 focuses, but also the second lens 12 in the first lens group 1 can focus. The seventh lens 31 or the eighth lens 32 in the third lens group 3 focuses, or the seventh lens 31 and the eighth lens 32 in the third lens group 3 focus as a group.
以下结合附图以及表，给出光学***在两个实际应用中的具体数值配置。参见图2和图3以及表1至表6，表中的面数1、2、...、16表示光学***中的表面标号，分别表示第一透镜11(面数1、2)、第二透镜12(面数3、4)、光阑4(表示为stop，面数5)、第三透镜21和第四透镜22(合起来为双胶合透镜，面数6、7、8，其中两个透镜的胶合面算一个表面7，)、第五透镜23(面数9、10)、第六透镜24(面数11、12)、第七透镜31(面数13、14)、第八透镜32(面数15、16)的镜面。The specific numerical configuration of the optical system in two practical applications is given below in conjunction with the drawings and the table. Refer to Figures 2 and 3 and Tables 1 to 6, where the surface numbers 1, 2,..., 16 in the table represent the surface numbers in the optical system, respectively representing the first lens 11 (surface numbers 1, 2) and the first lens Two lens 12 (face number 3, 4), stop 4 (represented as stop, face number 5), third lens 21 and fourth lens 22 (combined as a doublet lens, faces 6, 7, 8 The cemented surface of the two lenses is counted as one surface 7,), the fifth lens 23 (faces 9, 10), the sixth lens 24 (faces 11, 12), the seventh lens 31 (faces 13, 14), and the Mirror surface with eight lenses 32 (face numbers 15, 16).
在表1和表4中，曲率半径R(Radius)表示镜片表面弯曲的程度，R值越小，镜片表面越弯；间隔或厚度(Thickness)，当后面Nd和Vd有数值时，表示镜片厚度，当后面Nd和Vd没有数值时，表示镜片与镜片之间的距离；镜片的折射率nd(refractive index)是指光在真空中的传播速度与光在该镜片中的传播速度之比，镜片的折射率越高，使入射光发生折射的能力越强，折射率越高，镜片越薄，即镜片中心厚度相同，相同度数同种材料，折射率高的比折射率低的镜片边缘更薄；镜片的阿贝系数vd(Abbe number)，也称为色散系数，是用来衡量镜片的光线色散程度，光线色散程度越大阿贝系数越小，其成像的清晰度就越差，反之光线色散程度越小阿贝系数越大。一般来说，材料 的折射率越大，色散越厉害，即阿贝系数越低。“Infinity”表示平面。In Table 1 and Table 4, the radius of curvature R (Radius) indicates the degree of curvature of the lens surface. The smaller the R value, the more curved the lens surface; the interval or thickness (Thickness), when there are values for Nd and Vd, it indicates the thickness of the lens , When there is no value in the back of Nd and Vd, it means the distance between the lens and the lens; the refractive index of the lens nd (refractive index) refers to the ratio of the propagation speed of light in vacuum to the propagation speed of light in the lens. The higher the refractive index, the stronger the ability to refract the incident light. The higher the refractive index, the thinner the lens, that is, the center of the lens has the same thickness, the same power and the same material, and the higher refractive index is thinner than the lower refractive index lens ; The Abbe number vd (Abbe number) of the lens, also known as the chromatic dispersion coefficient, is used to measure the degree of light dispersion of the lens. The greater the degree of light dispersion, the smaller the Abbe number, the worse the sharpness of its imaging, and vice versa. The smaller the degree of dispersion, the greater the Abbe coefficient. Generally speaking, the greater the refractive index of the material, the greater the dispersion, that is, the lower the Abbe number. "Infinity" means plane.
表2和表5中，k为二次曲线常数，a 1至a 8分别表示各径向坐标所对应的系数。表3和表6表示从无限远物距到最近距离对焦时对应的焦距、像方F数(光阑F数)以及内对焦组的移动变化量的数据；内对焦组的移动变化量即为CT(5)和CT(12)的无限远与最近距离之差绝对值。 In Table 2 and Table 5, k is a conic constant, and a 1 to a 8 represent the coefficients corresponding to each radial coordinate. Table 3 and Table 6 show the corresponding focal length, image-side F-number (aperture F-number) and the amount of change in the movement of the inner focus group when focusing from the infinite object distance to the shortest distance; the movement change amount of the inner focus group is The absolute value of the difference between the infinity and the closest distance of CT(5) and CT(12).
其中，表1至表3是图2的光学***的具体数值配置；表4至表6是图3的光学***的具体数值配置。从表3可知内对焦移动量一致(第二透镜组2的第三透镜21、第四透镜22、第五透镜23、第六透镜24同时一起移动，前后移动量一样，即4.438-1.55＝6.276-3.388＝2.888)。Among them, Tables 1 to 3 are specific numerical configurations of the optical system in FIG. 2; Tables 4 to 6 are specific numerical configurations of the optical system in FIG. 3. It can be seen from Table 3 that the amount of internal focus movement is the same (the third lens 21, the fourth lens 22, the fifth lens 23, and the sixth lens 24 of the second lens group 2 move together at the same time, and the forward and backward movement amounts are the same, that is, 4.438-1.55 = 6.276 -3.388=2.888).
从表6可知内对焦移动量变化(第一透镜组1的第一透镜11和第二透镜12一起移动，而第二透镜组2的第三透镜21、第四透镜22、第五透镜23、第六透镜24同时一起移动，即第一透镜组1和第二透镜组的移动步伐不一致，CT(5)和CT(12)在无限远与最近距离对焦时移动量不一样，即(2.962-2.508＝0.454)≠(9.54-6.438＝3.102)。图3的对焦方式能够使光学***的整体长度更短，体积更小。It can be seen from Table 6 that the amount of internal focus movement changes (the first lens 11 and the second lens 12 of the first lens group 1 move together, while the third lens 21, the fourth lens 22, and the fifth lens 23 of the second lens group 2 move together. The sixth lens 24 moves at the same time, that is, the moving steps of the first lens group 1 and the second lens group are inconsistent, and the amount of movement of CT (5) and CT (12) when focusing at infinity and the closest distance is different, that is (2.962- 2.508=0.454)≠(9.54-6.438=3.102). The focusing method of Fig. 3 can make the overall length of the optical system shorter and smaller.
表1 第一个光学***各个表面参数数据Table 1 Data of various surface parameters of the first optical system
Figure PCTCN2019123117-appb-000002
Figure PCTCN2019123117-appb-000002
表2 第一个光学***各个表面非球面参数数据Table 2 Aspheric parameter data of each surface of the first optical system
面数Number of faces kk a 1 a 1 a 2 a 2 a 3 a 3 a 4 a 4 a 5 a 5 a 6 a 6 a 7 a 7 a 8 a 8
33 0.5170.517 00 5.00201E-055.00201E-05 4.98453E-084.98453E-08 5.19056E-085.19056E-08 -1.09155E-09-1.09155E-09 1.59864E-111.59864E-11 00 00
44 3.8503.850 00 -1.77016E-05-1.77016E-05 -1.12682E-06-1.12682E-06 -2.47923E-08-2.47923E-08 2.04561E-092.04561E-09 -1.08898E-10-1.08898E-10 00 00
99 5.4845.484 00 0.0001006880.000100688 2.00000E-062.00000E-06 -3.24556E-08-3.24556E-08 1.28740E-091.28740E-09 -1.94968E-11-1.94968E-11 00 00
1010 -0.996-0.996 00 2.31595E-052.31595E-05 3.85311E-073.85311E-07 2.11654E-092.11654E-09 6.48403E-116.48403E-11 -5.88468E-13-5.88468E-13 00 00
表3 第一个光学***透镜组配置数据Table 3 Configuration data of the first optical system lens group
 To 无限远Infinity 最近距离Shortest distance
焦距focal length 46.14mm46.14mm  To
像方F数(FNO)Image side F number (FNO) 4.094.09 4.234.23
CT(5)CT(5) 4.4384.438 1.5501.550
CT(12)CT(12) 3.3883.388 6.2766.276
表4 第二个光学***各个表面参数数据Table 4 Data of various surface parameters of the second optical system
Figure PCTCN2019123117-appb-000003
Figure PCTCN2019123117-appb-000003
表5 第二个光学***各个表面非球面参数数据Table 5 Aspheric parameter data of each surface of the second optical system
面数Number of faces kk a 1 a 1 a 2 a 2 a 3 a 3 a 4 a 4 a 5 a 5 a 6 a 6 a 7 a 7 a 8 a 8
33 00 00 2.30943E-052.30943E-05 5.29169E-075.29169E-07 2.87403E-082.87403E-08 -6.40324E-10-6.40324E-10 1.56278E-111.56278E-11 00 00
44 00 00 7.67008E-057.67008E-05 5.13974E-075.13974E-07 6.26556E-086.26556E-08 -1.71798E-09-1.71798E-09 3.80315E-113.80315E-11 00 00
99 00 00 1.47094E-041.47094E-04 1.44662E-061.44662E-06 4.94900E-094.94900E-09 -4.21743E-10-4.21743E-10 1.74006E-121.74006E-12 00 00
1010 00 00 1.44193E-041.44193E-04 1.30949E-061.30949E-06 1.19090E-081.19090E-08 -2.22213E-10-2.22213E-10 -1.24681E-13-1.24681E-13 00 00
表6 第二个光学***透镜组配置数据Table 6 The configuration data of the second optical system lens group
 To 无限远Infinity 最近距离Shortest distance
焦距focal length 45.3145.31  To
像方F数(FNO)Image side F number (FNO) 4.154.15 4.364.36
CT(5)CT(5) 2.9622.962 2.5082.508
CT(12)CT(12) 6.4386.438 9.5409.540
总之，上述本申请实施例的光学***有如下优点：In summary, the above-mentioned optical system of the embodiment of the present application has the following advantages:
1、本申请实施例所述的一种内对焦方式的光学***结构紧凑，采用了将光阑位置尽可能往物侧靠近的结构，使得光学***的总长缩短化(整个内对焦光学***总长度(第一透镜11物侧面顶点到成像面距离)可小于60mm，整个透镜***(第一透镜11物侧面顶点到第八透镜32像侧面顶点距离)可小于46mm，能实现小型、轻量化和便携化；1. The optical system of an internal focusing method described in the embodiments of the present application has a compact structure, and adopts a structure in which the position of the diaphragm is as close to the object side as possible, so that the total length of the optical system is shortened (the total length of the entire internal focusing optical system) (The distance from the vertex of the object side of the first lens 11 to the imaging surface) can be less than 60mm, and the entire lens system (the distance from the vertex of the object side of the first lens 11 to the vertex of the image side of the eighth lens 32) can be less than 46mm, which can achieve small size, light weight and portability. Change
2、本申请实施例所述的一种内对焦方式的光学***采用至少一片镜片内对焦作为对焦方式，使得***整体对焦重量较轻(对焦组重量小于14g，对焦组重量是指对焦组所有镜片加起来的重量)，对焦速度较快；2. The optical system of an internal focusing method described in the embodiment of this application uses at least one lens internal focusing as the focusing method, so that the overall focusing weight of the system is lighter (the weight of the focusing group is less than 14g, and the weight of the focusing group refers to all the lenses in the focusing group. The combined weight), the focusing speed is faster;
3、本申请实施例所述的一种内对焦方式的光学***对焦量较小，整体对焦量小于3mm，使得***的呼吸效应较小(小于10％)；3. The optical system of an internal focusing method described in the embodiment of the present application has a small focusing amount, and the overall focusing amount is less than 3mm, so that the breathing effect of the system is small (less than 10%);
4、本申请实施例所述的一种光学***可用于摄影光学***，可实现单反相机***拍摄范围较大，成像清晰，且可实现0.5m至无穷远不同物距的拍摄；4. The optical system described in the embodiments of the present application can be used in a photographic optical system, which can achieve a large shooting range of a single-lens reflex camera system, a clear image, and can achieve shooting at different object distances from 0.5m to infinity;
5、本申请实施例的光学***在满足上述所有条件的基础上，所述的内对焦方式的光学***，还有另外一种实施方式，可以根据不同的物距使得第一透镜组1和第二透镜组2同时往物侧方向移动而进行对焦，在此情况下，光学***的对焦量小于3.5mm，因对焦引起的呼吸效应小于8％；整个内对焦光学***的总长度(第一透镜物侧面顶点到成像面距离)可小于58mm，整个镜头***(第一透镜物侧面顶点到第八透镜像侧面顶点距离)可小于40mm；所述的内对焦方式的光学***当采用第一透镜组1和第二透镜组2同时对焦时，整体对焦重量依然小于14g，可实现快速对焦。5. On the basis of satisfying all the above-mentioned conditions, the optical system of the embodiment of the present application, the optical system of the internal focusing mode, there is another embodiment, which can make the first lens group 1 and the first lens group 1 and the first lens group 1 and the second lens group according to different object distances. The two lens groups 2 move to the object side at the same time to focus. In this case, the focusing amount of the optical system is less than 3.5mm, and the breathing effect caused by focusing is less than 8%; the total length of the entire inner focusing optical system (the first lens The distance from the apex of the object side to the imaging surface can be less than 58mm, and the entire lens system (the distance from the apex of the object side of the first lens to the apex of the image side of the eighth lens) can be less than 40mm; the optical system of the internal focusing mode should adopt the first lens group When the lens group 1 and the second lens group 2 focus at the same time, the overall focus weight is still less than 14g, which can achieve fast focus.
参见图4，图4是本申请拍摄装置一实施例的结构示意图。该拍摄装置40包括光学***10和拍摄设备41，光学***10连接于拍摄设备41，光学***10采用如上任一所述的光学***，其包括从物侧至像侧依次设置的第一透镜组1、第二透镜组2和第三透镜组3，相关内容的详细说明请参见上述的光学 ***部分，在此不再赘叙。Refer to FIG. 4, which is a schematic structural diagram of an embodiment of a photographing device of the present application. The photographing device 40 includes an optical system 10 and a photographing device 41. The optical system 10 is connected to the photographing device 41. The optical system 10 adopts any of the above-mentioned optical systems, which includes a first lens group arranged in sequence from the object side to the image side. 1. For the second lens group 2 and the third lens group 3, please refer to the above optical system part for detailed description of related content, which will not be repeated here.
拍摄装置40为可以进行拍摄的电子设备，包括单反相机、数码相机、运动相机或云台相机等。The photographing device 40 is an electronic device capable of photographing, including a single-lens reflex camera, a digital camera, a sports camera, or a pan-tilt camera.
其中，光学***10和拍摄设备41可拆卸连接，或者固定连接。可拆卸连接方便用户使用。Among them, the optical system 10 and the photographing device 41 are detachably connected or fixedly connected. The detachable connection is convenient for users to use.
在一实施例中，光学***10与拍摄设备41通过磁吸、粘贴、螺纹或卡扣中的一种或多种连接方式固定。以卡扣为例，当光学***10与拍摄设备41通过卡扣方式固定时，光学***10和拍摄设备41上通过公扣母扣扣合方式连接，具体地，可以在光学***10上安装有公扣，而拍摄设备41的对应位置安装有可供公扣扣合的母扣。反之亦然，公扣也可安装在拍摄设备41，此时光学***10上安装有可供公扣扣合的母扣。通过上述设置，一方面方便用户使用，另一方面可以避免光学***10与拍摄设备41脱落，增加光学***10与拍摄设备41连接的牢固性。In an embodiment, the optical system 10 and the photographing device 41 are fixed by one or more of magnetic attraction, pasting, screwing, or buckle. Taking a buckle as an example, when the optical system 10 and the photographing device 41 are fixed by a buckle, the optical system 10 and the photographing device 41 are connected by a male buckle and a female buckle. Specifically, the optical system 10 may be installed with A male buckle, and a female buckle for the male buckle is installed at the corresponding position of the photographing device 41. Vice versa, the male buckle can also be installed on the photographing device 41, and a female buckle for the male buckle is installed on the optical system 10 at this time. Through the above arrangement, on the one hand, it is convenient for users to use, and on the other hand, it can prevent the optical system 10 from falling off from the photographing device 41, and increase the firmness of the connection between the optical system 10 and the photographing device 41.
光学***10包括从物侧至像侧依次设置的第一透镜组、第二透镜组和第三透镜组，第一透镜组和第二透镜组均具有正光焦度，第三透镜组具有负光焦度；光学***满足以下条件：0.85<|f 1/f|<4.5，0.5<|f 2/f|<1.5，3<|f 3/f|<10，1<|TL/f|<1.5，0<|T 1/T 2|<0.5，0<|T 3/T 2|<0.5，其中f 1、f 2、f 3分别表示第一透镜组、第二透镜组、第三透镜组的焦距，f表示无限远对焦时光学***的焦距，TL表示第一透镜组的最靠近物侧的透镜面中心顶点到成像面为止的光轴上的距离，T 1表示第一透镜组的最靠近物侧的透镜面中心顶点到光阑的距离，T 2表示光阑面到第三透镜组最靠近物侧的透镜面中心顶点的距离，T 3表示第三透镜组中最靠近物侧的透镜面中心顶点到第三透镜组中最靠近像侧的透镜面中心顶点的距离。 The optical system 10 includes a first lens group, a second lens group, and a third lens group arranged in sequence from the object side to the image side. The first lens group and the second lens group both have positive refractive power, and the third lens group has negative light. Power; the optical system meets the following conditions: 0.85<|f 1 /f|<4.5, 0.5 <|f 2 /f|<1.5, 3 <|f 3 /f|<10, 1<|TL/f|< 1.5, 0<|T 1 /T 2 |<0.5, 0<|T 3 /T 2 |<0.5, where f 1 , f 2 , and f 3 represent the first lens group, the second lens group, and the third lens, respectively The focal length of the group, f represents the focal length of the optical system when focusing at infinity, TL represents the distance on the optical axis from the center vertex of the lens surface closest to the object side of the first lens group to the imaging surface, and T 1 represents the distance of the first lens group The distance from the center vertex of the lens surface closest to the object side to the diaphragm, T 2 represents the distance from the diaphragm surface to the center vertex of the third lens group closest to the object side, and T 3 represents the distance from the third lens group closest to the object side The distance from the center vertex of the lens surface to the center vertex of the lens surface closest to the image side in the third lens group.
其中，第一透镜组和第三透镜组相对于成像面被固定的状态下，使得第二透镜组沿着光轴从物侧向像侧移动。Wherein, in a state where the first lens group and the third lens group are fixed with respect to the imaging surface, the second lens group is moved from the object side to the image side along the optical axis.
其中，光学***从物侧至像侧设有至少八片透镜，依次分别为第一透镜、第二透镜、第三透镜、第四透镜、第五透镜、第六透镜、第七透镜、第八透镜；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、第五透镜和第六透镜，第三透镜组至少包括第七透镜在内的一个以上的透镜。Among them, the optical system is provided with at least eight lenses from the object side to the image side, which are the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, and the eighth lens in sequence. Lens; the first lens group includes a first lens and a second lens, the second lens group includes a third lens, a fourth lens, a fifth lens and a sixth lens, and the third lens group includes at least one of the seventh lens Of the lens.
其中，第一透镜组和第二透镜组至少包含一面非球面透镜。Wherein, the first lens group and the second lens group include at least one aspheric lens.
其中，第一透镜为负透镜，且满足以下条件：0.5<|f 11/f|<2.5，0<|f 12/f 11|<1，其中f 11表示第一透镜组的第一透镜的焦距，f 12表示第一透镜组的第二透镜的焦距。 Among them, the first lens is a negative lens and satisfies the following conditions: 0.5<|f 11 /f|<2.5, 0 <|f 12 /f 11 |<1, where f 11 represents the first lens of the first lens group Focal length, f 12 represents the focal length of the second lens of the first lens group.
其中，第一透镜组的第二透镜为非球面透镜。Wherein, the second lens of the first lens group is an aspheric lens.
其中，第二透镜至少有一面是非球面。Wherein, at least one surface of the second lens is aspherical.
其中，第一透镜组的第一透镜和第二透镜均设置在物侧和光阑之间。Wherein, the first lens and the second lens of the first lens group are both arranged between the object side and the diaphragm.
其中，第二透镜组至少包含一片以上的正透镜和一片以上的负透镜。Wherein, the second lens group includes at least one positive lens and one negative lens.
其中，第二透镜组至少包括一组双胶合透镜。Wherein, the second lens group includes at least a set of double cemented lenses.
其中，第二透镜组的第三透镜和第四透镜为双胶合透镜，第二透镜组的第五透镜和第六透镜分别为单透镜。The third lens and the fourth lens of the second lens group are double cemented lenses, and the fifth lens and the sixth lens of the second lens group are single lenses.
其中，第二透镜组满足以下条件：0<|f 20/f 2|<1，0.25<|f 23/f 2|<2.5，0<|f 24/f 2|<1，其中f 20表示第二透镜组中双胶合透镜的整体焦距，f 23表示第二透镜组中第五透镜的焦距，f 24表示第二透镜组中第六透镜的焦距。 Among them, the second lens group satisfies the following conditions: 0<|f 20 /f 2 |<1, 0.25<|f 23 /f 2 |<2.5, 0<|f 24 /f 2 |<1, where f 20 means The overall focal length of the doublet lens in the second lens group, f 23 represents the focal length of the fifth lens in the second lens group, and f 24 represents the focal length of the sixth lens in the second lens group.
其中，第二透镜组至少包含一片非球面透镜。Wherein, the second lens group includes at least one aspheric lens.
其中，第二透镜组至少包含的一片非球面透镜至少有一面是非球面。Wherein, at least one aspheric lens included in the second lens group has at least one aspheric surface.
其中，非球面透镜的非球面设置在口径较小的透镜面。Among them, the aspheric surface of the aspheric lens is arranged on the lens surface with a smaller aperture.
其中，第三透镜组还包括第八透镜，第三透镜组至少包括一片正透镜和一片负透镜，且满足以下条件：0<|f 31/f 3|<0.5，0<|f 32/f 3|<0.5，其中f 31表示第三透镜组中第七透镜的焦距，f 32表示第三透镜组中第八透镜的焦距。 Among them, the third lens group also includes an eighth lens, and the third lens group includes at least one positive lens and one negative lens, and meets the following conditions: 0<|f 31 /f 3 |<0.5, 0<|f 32 /f 3 |<0.5, where f 31 represents the focal length of the seventh lens in the third lens group, and f 32 represents the focal length of the eighth lens in the third lens group.
其中，第三透镜组中第七透镜和第八透镜的像侧面均弯向物侧。Wherein, the image side surfaces of the seventh lens and the eighth lens in the third lens group are both bent toward the object side.
其中，第一透镜组满足以下条件：(vd 11，vd 12)>40，1.4<nd 11<1.6，1.5<nd 12<2；其中vd 11、vd 12分别表示第一透镜、第二透镜的色散系数；nd 11、nd 12分别表示第一透镜、第二透镜的折射率。 Among them, the first lens group satisfies the following conditions: (vd 11 , vd 12 )>40, 1.4<nd 11 <1.6, 1.5<nd 12 <2; where vd 11 and vd 12 represent the first lens and the second lens, respectively Dispersion coefficient; nd 11 , nd 12 represent the refractive index of the first lens and the second lens, respectively.
其中，第二透镜组满足以下条件：(vd 21，vd 23，vd 24)>40，0<vd 22<40，1.4<nd 24<1.6，1.5<(nd 21，nd 22，nd 23)<2；其中vd 21、vd 22、vd 23、vd 24分别表示第三透镜、第四透镜、第五透镜、第六透镜的色散系数；nd 21、nd 22、nd 23、nd 24分别表示第三透镜、第四透镜、第五透镜、第六透镜的折射率。 Among them, the second lens group satisfies the following conditions: (vd 21 , vd 23 , vd 24 )>40, 0<vd 22 <40, 1.4<nd 24 <1.6, 1.5<(nd 21 , nd 22 , nd 23 )<2; where vd 21 , vd 22 , vd 23 , and vd 24 represent the dispersion coefficients of the third lens, the fourth lens, the fifth lens, and the sixth lens, respectively; nd 21 , nd 22 , nd 23 , and nd 24 represent the third lens, respectively The refractive index of the lens, the fourth lens, the fifth lens, and the sixth lens.
其中，第二透镜组满足以下条件：0<vd 22<35，nd 22>1.6，vd 24>81，nd 24<1.5。 Among them, the second lens group satisfies the following conditions: 0<vd 22 <35, nd 22 >1.6, vd 24 >81, and nd 24 <1.5.
其中，第三透镜组满足以下条件：0<vd 32<40，30<vd 31<60，1.5<(nd 31，nd 32)<2；其中vd 31、vd 32分别表示第七透镜、第八透镜的色散系数；nd 31、nd 32分别表示第七透镜、第八透镜的折射率。 Among them, the third lens group satisfies the following conditions: 0<vd 32 <40, 30 <vd 31 <60, 1.5<(nd 31 , nd 32 )<2; where vd 31 and vd 32 represent the seventh lens and the eighth lens, respectively The dispersion coefficient of the lens; nd 31 and nd 32 represent the refractive index of the seventh lens and the eighth lens, respectively.
其中，第三透镜组满足以下条件：0<vd 32<35，nd 32>1.85。 Among them, the third lens group satisfies the following conditions: 0<vd 32 <35, nd 32 >1.85.
其中，第一透镜组和第二透镜组包含两片非球面透镜。Wherein, the first lens group and the second lens group include two aspheric lenses.
其中，两片非球面透镜的非球面表面是高次非球面。Among them, the aspheric surfaces of the two aspheric lenses are high-order aspheric surfaces.
其中，第一透镜组、第二透镜组和第三透镜组中至少一组包括塑胶透镜；或者第一透镜组、第二透镜组和第三透镜组中所有镜片均为玻璃透镜。Wherein, at least one of the first lens group, the second lens group, and the third lens group includes a plastic lens; or all the lenses in the first lens group, the second lens group, and the third lens group are glass lenses.
其中，光学***与拍摄设备通过磁吸、粘贴、螺纹或卡扣中的一种或多种连接方式固定。Wherein, the optical system and the photographing equipment are fixed by one or more connection methods of magnetic attraction, pasting, threading, or buckle.
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到各种等效的修改或替换，这些修改或替换都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以权利要求的保护范围为准。The above are only specific implementations of this application, but the protection scope of this application is not limited to this. Anyone familiar with the technical field can easily think of various equivalents within the technical scope disclosed in this application. Modifications or replacements, these modifications or replacements shall be covered within the protection scope of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims (51)

  1. 一种光学***，其特征在于，包括从物侧至像侧依次设置的第一透镜组、第二透镜组和第三透镜组，所述第一透镜组和所述第二透镜组均具有正光焦度，所述第三透镜组具有负光焦度；An optical system, characterized in that it comprises a first lens group, a second lens group and a third lens group arranged in sequence from the object side to the image side, the first lens group and the second lens group both having positive light Power, the third lens group has a negative power;
    所述光学***满足以下条件：0.85<|f 1/f|<4.5，0.5<|f 2/f|<1.5，3<|f 3/f|<10，1<|TL/f|<1.5，0<|T 1/T 2|<0.5，0<|T 3/T 2|<0.5，其中f 1、f 2、f 3分别表示第一透镜组、第二透镜组、第三透镜组的焦距，f表示无限远对焦时光学***的焦距，TL表示所述第一透镜组的最靠近物侧的透镜面中心顶点到成像面为止的光轴上的距离，T 1表示所述第一透镜组的最靠近物侧的透镜面中心顶点到光阑的距离，T 2表示光阑面到所述第三透镜组最靠近物侧的透镜面中心顶点的距离，T 3表示所述第三透镜组中最靠近物侧的透镜面中心顶点到所述第三透镜组中最靠近像侧的透镜面中心顶点的距离。 The optical system satisfies the following conditions: 0.85<|f 1 /f|<4.5, 0.5 <|f 2 /f|<1.5, 3<|f 3 / f|<10, 1 <|TL/f|<1.5 , 0<|T 1 /T 2 |<0.5 , 0<|T 3 /T 2 |<0.5, where f 1 , f 2 , and f 3 represent the first lens group, the second lens group, and the third lens group, respectively F represents the focal length of the optical system when focusing at infinity, TL represents the distance on the optical axis from the center vertex of the lens surface closest to the object side of the first lens group to the imaging surface, and T 1 represents the first lens The distance from the center vertex of the lens surface closest to the object side of the lens group to the diaphragm, T 2 represents the distance from the diaphragm surface to the center vertex of the lens surface closest to the object side of the third lens group, and T 3 represents the third The distance from the center vertex of the lens surface closest to the object side in the lens group to the center vertex of the lens surface closest to the image side in the third lens group.
  2. 根据权利要求1所述的光学***，其特征在于，所述第一透镜组和所述第三透镜组相对于成像面被固定的状态下，使得所述第二透镜组沿着光轴从物侧向像侧移动。The optical system according to claim 1, wherein the first lens group and the third lens group are fixed relative to the imaging surface, so that the second lens group moves from the object along the optical axis. Move sideways to the image side.
  3. 根据权利要求2所述的光学***，其特征在于，所述光学***从物侧至像侧设有至少八片透镜，依次分别为第一透镜、第二透镜、第三透镜、第四透镜、第五透镜、第六透镜、第七透镜、第八透镜；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、第五透镜和第六透镜，所述第三透镜组至少包括第七透镜在内的一个以上的透镜。The optical system according to claim 2, wherein the optical system is provided with at least eight lenses from the object side to the image side, which are respectively a first lens, a second lens, a third lens, a fourth lens, The fifth lens, the sixth lens, the seventh lens, and the eighth lens; the first lens group includes a first lens and a second lens, and the second lens group includes a third lens, a fourth lens, and a fifth lens. The sixth lens, the third lens group includes at least one lens including the seventh lens.
  4. 根据权利要求3所述的光学***，其特征在于，所述第一透镜组和所述第二透镜组至少包含一面非球面透镜。3. The optical system of claim 3, wherein the first lens group and the second lens group comprise at least one aspheric lens.
  5. 根据权利要求3所述的光学***，其特征在于，所述第一透镜为负透镜，且满足以下条件：0.5<|f 11/f|<2.5，0<|f 12/f 11|<1，其中f 11表示第一透镜组的第一透镜的焦距，f 12表示第一透镜组的第二透镜的焦距。 The optical system according to claim 3, wherein the first lens is a negative lens and meets the following conditions: 0.5<|f 11 /f|<2.5, 0 <|f 12 /f 11 |<1 , Where f 11 represents the focal length of the first lens of the first lens group, and f 12 represents the focal length of the second lens of the first lens group.
  6. 根据权利要求4所述的光学***，其特征在于，所述第一透镜组的第二透镜为非球面透镜。The optical system according to claim 4, wherein the second lens of the first lens group is an aspheric lens.
  7. 根据权利要求6所述的光学***，其特征在于，所述第二透镜至少有 一面是非球面。The optical system according to claim 6, wherein at least one surface of the second lens is aspherical.
  8. 根据权利要求3所述的光学***，其特征在于，所述第一透镜组的第一透镜和第二透镜均设置在物侧和光阑之间。The optical system according to claim 3, wherein the first lens and the second lens of the first lens group are both arranged between the object side and the diaphragm.
  9. 根据权利要求3所述的光学***，其特征在于，所述第二透镜组至少包含一片以上的正透镜和一片以上的负透镜。The optical system according to claim 3, wherein the second lens group at least comprises more than one positive lens and more than one negative lens.
  10. 根据权利要求9所述的光学***，其特征在于，所述第二透镜组至少包括一组双胶合透镜。9. The optical system according to claim 9, wherein the second lens group includes at least a set of double cemented lenses.
  11. 根据权利要求10所述的光学***，其特征在于，所述第二透镜组的第三透镜和第四透镜为双胶合透镜，所述第二透镜组的第五透镜和第六透镜分别为单透镜。The optical system according to claim 10, wherein the third lens and the fourth lens of the second lens group are double cemented lenses, and the fifth lens and the sixth lens of the second lens group are single lens.
  12. 根据权利要求11所述的光学***，其特征在于，所述第二透镜组满足以下条件：0<|f 20/f 2|<1，0.25<|f 23/f 2|<2.5，0<|f 24/f 2|<1，其中f 20表示所述第二透镜组中双胶合透镜的整体焦距，f 23表示所述第二透镜组中第五透镜的焦距，f 24表示所述第二透镜组中第六透镜的焦距。 The optical system according to claim 11, wherein the second lens group satisfies the following conditions: 0<|f 20 /f 2 |<1, 0.25<|f 23 /f 2 |<2.5, 0< |f 24 /f 2 |<1, where f 20 represents the overall focal length of the doublet lens in the second lens group, f 23 represents the focal length of the fifth lens in the second lens group, and f 24 represents the first lens group. The focal length of the sixth lens in the two lens group.
  13. 根据权利要求4所述的光学***，其特征在于，所述第二透镜组至少包含一片非球面透镜。The optical system according to claim 4, wherein the second lens group includes at least one aspheric lens.
  14. 根据权利要求13所述的光学***，其特征在于，所述第二透镜组至少包含的一片非球面透镜至少有一面是非球面。The optical system according to claim 13, wherein at least one aspherical lens included in the second lens group has at least one aspherical surface.
  15. 根据权利要求4、6或13所述的光学***，其特征在于，所述非球面透镜的非球面设置在口径较小的透镜面。The optical system according to claim 4, 6 or 13, wherein the aspheric surface of the aspheric lens is arranged on a lens surface with a smaller aperture.
  16. 根据权利要求3所述的光学***，其特征在于，所述第三透镜组还包括第八透镜，所述第三透镜组至少包括一片正透镜和一片负透镜，且满足以下条件：0<|f 31/f 3|<0.5，0<|f 32/f 3|<0.5，其中f 31表示所述第三透镜组中第七透镜的焦距，f 32表示所述第三透镜组中第八透镜的焦距。 The optical system according to claim 3, wherein the third lens group further comprises an eighth lens, and the third lens group includes at least one positive lens and one negative lens, and the following conditions are satisfied: 0<| f 31 /f 3 |<0.5, 0<|f 32 /f 3 |<0.5, where f 31 represents the focal length of the seventh lens in the third lens group, and f 32 represents the eighth lens in the third lens group The focal length of the lens.
  17. 根据权利要求16所述的光学***，其特征在于，所述第三透镜组中第七透镜和第八透镜的像侧面均弯向物侧。The optical system according to claim 16, wherein the image side surfaces of the seventh lens and the eighth lens in the third lens group are both bent toward the object side.
  18. 根据权利要求3所述的光学***，其特征在于，所述第一透镜组满足以下条件：(vd 11，vd 12)>40，1.4<nd 11<1.6，1.5<nd 12<2；其中vd 11、vd 12分别表示所述第一透镜、第二透镜的色散系数；nd 11、nd 12分别表示所述第一透 镜、第二透镜的折射率。 The optical system according to claim 3, wherein the first lens group satisfies the following conditions: (vd 11 , vd 12 )>40, 1.4<nd 11 <1.6, 1.5<nd 12 <2; where vd 11 and vd 12 respectively represent the dispersion coefficients of the first lens and the second lens; nd 11 and nd 12 represent the refractive indices of the first lens and the second lens, respectively.
  19. 根据权利要求3所述的光学***，其特征在于，所述第二透镜组满足以下条件：(vd 21，vd 23，vd 24)>40，0<vd 22<40，1.4<nd 24<1.6，1.5<(nd 21，nd 22，nd 23)<2；其中vd 21、vd 22、vd 23、vd 24分别表示所述第三透镜、第四透镜、第五透镜、第六透镜的色散系数；nd 21、nd 22、nd 23、nd 24分别表示所述第三透镜、第四透镜、第五透镜、第六透镜的折射率。 The optical system according to claim 3, wherein the second lens group satisfies the following conditions: (vd 21 , vd 23 , vd 24 )>40, 0<vd 22 <40, 1.4<nd 24 <1.6 , 1.5<(nd 21 , nd 22 , nd 23 )<2; where vd 21 , vd 22 , vd 23 , and vd 24 represent the dispersion coefficients of the third lens, fourth lens, fifth lens, and sixth lens, respectively ; Nd 21 , nd 22 , nd 23 , and nd 24 represent the refractive indices of the third lens, the fourth lens, the fifth lens, and the sixth lens, respectively.
  20. 根据权利要求19所述的光学***，其特征在于，所述第二透镜组满足以下条件：0<vd 22<35，nd 22>1.6，vd 24>81，nd 24<1.5。 The optical system according to claim 19, wherein the second lens group satisfies the following conditions: 0<vd 22 <35, nd 22 >1.6, vd 24 >81, and nd 24 <1.5.
  21. 根据权利要求16所述的光学***，其特征在于，所述第三透镜组满足以下条件：0<vd 32<40，30<vd 31<60，1.5<(nd 31，nd 32)<2；其中vd 31、vd 32分别表示所述第七透镜、第八透镜的色散系数；nd 31、nd 32分别表示所述第七透镜、第八透镜的折射率。 The optical system according to claim 16, wherein the third lens group satisfies the following conditions: 0<vd 32 <40, 30 <vd 31 <60, 1.5<(nd 31 , nd 32 )<2; Wherein vd 31 and vd 32 represent the dispersion coefficients of the seventh lens and the eighth lens respectively; nd 31 and nd 32 represent the refractive indices of the seventh lens and the eighth lens respectively.
  22. 根据权利要求21所述的光学***，其特征在于，所述第三透镜组满足以下条件：0<vd 32<35，nd 32>1.85。 The optical system according to claim 21, wherein the third lens group satisfies the following conditions: 0<vd 32 <35, nd 32 >1.85.
  23. 根据权利要求4所述的光学***，其特征在于，所述第一透镜组和所述第二透镜组包含两片非球面透镜。4. The optical system according to claim 4, wherein the first lens group and the second lens group comprise two aspheric lenses.
  24. 根据权利要求23所述的光学***，其特征在于，两片所述非球面透镜的非球面表面是高次非球面。The optical system according to claim 23, wherein the aspheric surfaces of the two aspheric lenses are high-order aspheric surfaces.
  25. 根据权利要求1-24任一项所述的光学***，其特征在于，所述第一透镜组、第二透镜组和第三透镜组中至少一组包括塑胶透镜；或者所述第一透镜组、第二透镜组和第三透镜组中所有镜片均为玻璃透镜。The optical system according to any one of claims 1-24, wherein at least one of the first lens group, the second lens group, and the third lens group includes a plastic lens; or the first lens group , All lenses in the second lens group and the third lens group are glass lenses.
  26. 一种拍摄装置，其特征在于，所述拍摄装置包括光学***和拍摄设备，所述光学***连接于所述拍摄设备，所述光学***包括从物侧至像侧依次设置的第一透镜组、第二透镜组和第三透镜组，所述第一透镜组和所述第二透镜组均具有正光焦度，所述第三透镜组具有负光焦度；A photographing device, characterized in that the photographing device comprises an optical system and a photographing equipment, the optical system is connected to the photographing equipment, and the optical system comprises a first lens group arranged in order from the object side to the image side, A second lens group and a third lens group, the first lens group and the second lens group both have positive refractive power, and the third lens group has negative refractive power;
    所述光学***满足以下条件：0.85<|f 1/f|<4.5，0.5<|f 2/f|<1.5，3<|f 3/f|<10，1<|TL/f|<1.5，0<|T 1/T 2|<0.5，0<|T 3/T 2|<0.5，其中f 1、f 2、f 3分别表示第一透镜组、第二透镜组、第三透镜组的焦距，f表示无限远对焦时光学***的焦距，TL表示所述第一透镜组的最靠近物侧的透镜面中心顶点到成像面为止的光轴 上的距离，T 1表示所述第一透镜组的最靠近物侧的透镜面中心顶点到光阑的距离，T 2表示光阑面到所述第三透镜组最靠近物侧的透镜面中心顶点的距离，T 3表示所述第三透镜组中最靠近物侧的透镜面中心顶点到所述第三透镜组中最靠近像侧的透镜面中心顶点的距离。 The optical system satisfies the following conditions: 0.85<|f 1 /f|<4.5, 0.5 <|f 2 /f|<1.5, 3<|f 3 / f|<10, 1 <|TL/f|<1.5 , 0<|T 1 /T 2 |<0.5 , 0<|T 3 /T 2 |<0.5, where f 1 , f 2 , and f 3 represent the first lens group, the second lens group, and the third lens group, respectively F represents the focal length of the optical system when focusing at infinity, TL represents the distance on the optical axis from the center vertex of the lens surface closest to the object side of the first lens group to the imaging surface, and T 1 represents the first lens The distance from the center vertex of the lens surface closest to the object side of the lens group to the diaphragm, T 2 represents the distance from the diaphragm surface to the center vertex of the lens surface closest to the object side of the third lens group, and T 3 represents the third The distance from the center vertex of the lens surface closest to the object side in the lens group to the center vertex of the lens surface closest to the image side in the third lens group.
  27. 根据权利要求26所述的拍摄装置，其特征在于，所述第一透镜组和所述第三透镜组相对于成像面被固定的状态下，使得所述第二透镜组沿着光轴从物侧向像侧移动。The photographing device according to claim 26, wherein the first lens group and the third lens group are fixed with respect to the imaging surface, so that the second lens group moves from the object along the optical axis. Move sideways to the image side.
  28. 根据权利要求27所述的拍摄装置，其特征在于，所述光学***从物侧至像侧设有至少八片透镜，依次分别为第一透镜、第二透镜、第三透镜、第四透镜、第五透镜、第六透镜、第七透镜、第八透镜；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、第五透镜和第六透镜，所述第三透镜组至少包括第七透镜在内的一个以上的透镜。The photographing device according to claim 27, wherein the optical system is provided with at least eight lenses from the object side to the image side, which are respectively a first lens, a second lens, a third lens, a fourth lens, The fifth lens, the sixth lens, the seventh lens, and the eighth lens; the first lens group includes a first lens and a second lens, and the second lens group includes a third lens, a fourth lens, and a fifth lens. The sixth lens, the third lens group includes at least one lens including the seventh lens.
  29. 根据权利要求28所述的拍摄装置，其特征在于，所述第一透镜组和所述第二透镜组至少包含一面非球面透镜。The photographing device according to claim 28, wherein the first lens group and the second lens group comprise at least one aspheric lens.
  30. 根据权利要求28所述的拍摄装置，其特征在于，所述第一透镜为负透镜，且满足以下条件：0.5<|f 11/f|<2.5，0<|f 12/f 11|<1，其中f 11表示第一透镜组的第一透镜的焦距，f 12表示第一透镜组的第二透镜的焦距。 The photographing device according to claim 28, wherein the first lens is a negative lens and satisfies the following conditions: 0.5<|f 11 /f|<2.5, 0 <|f 12 /f 11 |<1 , Where f 11 represents the focal length of the first lens of the first lens group, and f 12 represents the focal length of the second lens of the first lens group.
  31. 根据权利要求29所述的拍摄装置，其特征在于，所述第一透镜组的第二透镜为非球面透镜。The photographing device according to claim 29, wherein the second lens of the first lens group is an aspheric lens.
  32. 根据权利要求31所述的拍摄装置，其特征在于，所述第二透镜至少有一面是非球面。The photographing device according to claim 31, wherein at least one surface of the second lens is aspherical.
  33. 根据权利要求28所述的拍摄装置，其特征在于，所述第一透镜组的第一透镜和第二透镜均设置在物侧和光阑之间。The photographing device according to claim 28, wherein the first lens and the second lens of the first lens group are both arranged between the object side and the diaphragm.
  34. 根据权利要求28所述的拍摄装置，其特征在于，所述第二透镜组至少包含一片以上的正透镜和一片以上的负透镜。The photographing device according to claim 28, wherein the second lens group at least comprises more than one positive lens and more than one negative lens.
  35. 根据权利要求34所述的拍摄装置，其特征在于，所述第二透镜组至少包括一组双胶合透镜。The photographing device according to claim 34, wherein the second lens group includes at least a set of double cemented lenses.
  36. 根据权利要求35所述的拍摄装置，其特征在于，所述第二透镜组的第三透镜和第四透镜为双胶合透镜，所述第二透镜组的第五透镜和第六透镜分 别为单透镜。The photographing device according to claim 35, wherein the third lens and the fourth lens of the second lens group are double cemented lenses, and the fifth lens and the sixth lens of the second lens group are single lens.
  37. 根据权利要求36所述的拍摄装置，其特征在于，所述第二透镜组满足以下条件：0<|f 20/f 2|<1，0.25<|f 23/f 2|<2.5，0<|f 24/f 2|<1，其中f 20表示所述第二透镜组中双胶合透镜的整体焦距，f 23表示所述第二透镜组中第五透镜的焦距，f 24表示所述第二透镜组中第六透镜的焦距。 The photographing device according to claim 36, wherein the second lens group satisfies the following conditions: 0<|f 20 /f 2 |<1, 0.25<|f 23 /f 2 |<2.5, 0< |f 24 /f 2 |<1, where f 20 represents the overall focal length of the doublet lens in the second lens group, f 23 represents the focal length of the fifth lens in the second lens group, and f 24 represents the first lens group. The focal length of the sixth lens in the two lens group.
  38. 根据权利要求29所述的拍摄装置，其特征在于，所述第二透镜组至少包含一片非球面透镜。The photographing device of claim 29, wherein the second lens group comprises at least one aspheric lens.
  39. 根据权利要求38所述的拍摄装置，其特征在于，所述第二透镜组至少包含的一片非球面透镜至少有一面是非球面。The photographing device according to claim 38, wherein at least one aspheric lens included in the second lens group has at least one aspheric surface.
  40. 根据权利要求29、31或38所述的拍摄装置，其特征在于，所述非球面透镜的非球面设置在口径较小的透镜面。The photographing device according to claim 29, 31 or 38, wherein the aspheric surface of the aspheric lens is arranged on a lens surface with a smaller aperture.
  41. 根据权利要求28所述的拍摄装置，其特征在于，所述第三透镜组还包括第八透镜，所述第三透镜组至少包括一片正透镜和一片负透镜，且满足以下条件：0<|f 31/f 3|<0.5，0<|f 32/f 3|<0.5，其中f 31表示所述第三透镜组中第七透镜的焦距，f 32表示所述第三透镜组中第八透镜的焦距。 The photographing device according to claim 28, wherein the third lens group further comprises an eighth lens, and the third lens group comprises at least one positive lens and one negative lens, and the following conditions are satisfied: 0<| f 31 /f 3 |<0.5, 0<|f 32 /f 3 |<0.5, where f 31 represents the focal length of the seventh lens in the third lens group, and f 32 represents the eighth lens in the third lens group The focal length of the lens.
  42. 根据权利要求41所述的拍摄装置，其特征在于，所述第三透镜组中第七透镜和第八透镜的像侧面均弯向物侧。The photographing device according to claim 41, wherein the image side surfaces of the seventh lens and the eighth lens in the third lens group are both curved toward the object side.
  43. 根据权利要求28所述的拍摄装置，其特征在于，所述第一透镜组满足以下条件：(vd 11，vd 12)>40，1.4<nd 11<1.6，1.5<nd 12<2；其中vd 11、vd 12分别表示所述第一透镜、第二透镜的色散系数；nd 11、nd 12分别表示所述第一透镜、第二透镜的折射率。 The photographing device according to claim 28, wherein the first lens group satisfies the following conditions: (vd 11 , vd 12 )>40, 1.4<nd 11 <1.6, 1.5<nd 12 <2; where vd 11 and vd 12 respectively represent the dispersion coefficients of the first lens and the second lens; nd 11 and nd 12 represent the refractive indices of the first lens and the second lens, respectively.
  44. 根据权利要求28所述的拍摄装置，其特征在于，所述第二透镜组满足以下条件：(vd 21，vd 23，vd 24)>40，0<vd 22<40，1.4<nd 24<1.6，1.5<(nd 21，nd 22，nd 23)<2；其中vd 21、vd 22、vd 23、vd 24分别表示所述第三透镜、第四透镜、第五透镜、第六透镜的色散系数；nd 21、nd 22、nd 23、nd 24分别表示所述第三透镜、第四透镜、第五透镜、第六透镜的折射率。 The photographing device according to claim 28, wherein the second lens group satisfies the following conditions: (vd 21 , vd 23 , vd 24 )>40, 0<vd 22 <40, 1.4<nd 24 <1.6 , 1.5<(nd 21 , nd 22 , nd 23 )<2; where vd 21 , vd 22 , vd 23 , and vd 24 represent the dispersion coefficients of the third lens, fourth lens, fifth lens, and sixth lens, respectively ; Nd 21 , nd 22 , nd 23 , and nd 24 represent the refractive indices of the third lens, the fourth lens, the fifth lens, and the sixth lens, respectively.
  45. 根据权利要求44所述的拍摄装置，其特征在于，所述第二透镜组满足以下条件：0<vd 22<35，nd 22>1.6，vd 24>81，nd 24<1.5。 The photographing device according to claim 44, wherein the second lens group satisfies the following conditions: 0<vd 22 <35, nd 22 >1.6, vd 24 >81, and nd 24 <1.5.
  46. 根据权利要求41所述的拍摄装置，其特征在于，所述第三透镜组满 足以下条件：0<vd 32<40，30<vd 31<60，1.5<(nd 31，nd 32)<2；其中vd 31、vd 32分别表示所述第七透镜、第八透镜的色散系数；nd 31、nd 32分别表示所述第七透镜、第八透镜的折射率。 The photographing device according to claim 41, wherein the third lens group satisfies the following conditions: 0<vd 32 <40, 30 <vd 31 <60, 1.5<(nd 31 , nd 32 )<2; Wherein vd 31 and vd 32 represent the dispersion coefficients of the seventh lens and the eighth lens respectively; nd 31 and nd 32 represent the refractive indices of the seventh lens and the eighth lens respectively.
  47. 根据权利要求46所述的拍摄装置，其特征在于，所述第三透镜组满足以下条件：0<vd 32<35，nd 32>1.85。 The photographing device according to claim 46, wherein the third lens group satisfies the following conditions: 0<vd 32 <35, nd 32 >1.85.
  48. 根据权利要求29所述的拍摄装置，其特征在于，所述第一透镜组和所述第二透镜组包含两片非球面透镜。The photographing device according to claim 29, wherein the first lens group and the second lens group comprise two aspheric lenses.
  49. 根据权利要求48所述的拍摄装置，其特征在于，两片所述非球面透镜的非球面表面是高次非球面。The imaging device according to claim 48, wherein the aspheric surfaces of the two aspheric lenses are high-order aspheric surfaces.
  50. 根据权利要求26-49任一项所述的拍摄装置，其特征在于，所述第一透镜组、第二透镜组和第三透镜组中至少一组包括塑胶透镜；或者所述第一透镜组、第二透镜组和第三透镜组中所有镜片均为玻璃透镜。The photographing device according to any one of claims 26-49, wherein at least one of the first lens group, the second lens group, and the third lens group comprises a plastic lens; or the first lens group , All lenses in the second lens group and the third lens group are glass lenses.
  51. 根据权利要求26-50任一项所述的拍摄装置，其特征在于，所述光学***与所述拍摄设备通过磁吸、粘贴、螺纹或卡扣中的一种或多种连接方式固定。The photographing device according to any one of claims 26 to 50, wherein the optical system and the photographing device are fixed by one or more of magnetic attraction, pasting, threading, or buckle.
PCT/CN2019/123117 2019-12-04 2019-12-04 Optical system and photographing apparatus WO2021109042A1 (en)

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