WO2022006925A1 - 一种变形镜头 - Google Patents

一种变形镜头 Download PDF

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Publication number
WO2022006925A1
WO2022006925A1 PCT/CN2020/101859 CN2020101859W WO2022006925A1 WO 2022006925 A1 WO2022006925 A1 WO 2022006925A1 CN 2020101859 W CN2020101859 W CN 2020101859W WO 2022006925 A1 WO2022006925 A1 WO 2022006925A1
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Prior art keywords
lens
anamorphic
group
spherical
lenses
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PCT/CN2020/101859
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English (en)
French (fr)
Inventor
李�杰
吴伟
麦玉
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广东思锐光学股份有限公司
中山市亚中光电科技有限公司
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Application filed by 广东思锐光学股份有限公司, 中山市亚中光电科技有限公司 filed Critical 广东思锐光学股份有限公司
Priority to KR1020207024809A priority Critical patent/KR20220007492A/ko
Priority to JP2020545700A priority patent/JP2022543503A/ja
Priority to US17/003,778 priority patent/US10983313B1/en
Priority to EP20193118.5A priority patent/EP3936919A1/en
Priority to US17/101,219 priority patent/US11249288B2/en
Publication of WO2022006925A1 publication Critical patent/WO2022006925A1/zh

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    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00Optical objectives specially designed for the purposes specified below
    • G02B13/001Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G02B13/0015Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00Optical objectives specially designed for the purposes specified below
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00Optical objectives specially designed for the purposes specified below
    • G02B13/001Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G02B13/009Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras having zoom function
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/0025Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for optical correction, e.g. distorsion, aberration

Definitions

  • the present application relates to the technical field of lenses, in particular to a 75mm focal length half-frame large aperture anamorphic lens.
  • the conventional shooting ratio of mobile phones, tablet computers, cameras and other devices on the market is 16:9, while the ratio of film-like wide-screen video is 2.4:1.
  • good micro-movie or video shooting requires lenses of different focal lengths to cooperate with each other, especially for close-ups of characters, a medium-telephoto anamorphic lens is required.
  • the technical problem to be solved by the present application is to overcome the defect of the prior art that the professional medium telephoto and large aperture anamorphic lens has high quality and high price and is not suitable for use by ordinary users, thereby providing an anamorphic lens.
  • an anamorphic lens comprising a cylindrical lens group and a spherical lens group sequentially arranged from the object side to the image side, and the cylindrical lens group is a first lens, a second lens and a first lens in sequence.
  • the first lens and the second lens are cylindrical lenses with negative refractive power
  • the third lens is a cylindrical lens with positive refractive power
  • the spherical lens groups are arranged in sequence along the direction of the optical path to the image the fourth lens, ..., the Nth lens, where N is a natural number greater than or equal to 10;
  • the power distribution of the cylindrical lens group and the spherical lens group satisfies the following relationship:
  • the curvature direction of the first lens is the X direction
  • the Y direction is the direction perpendicular to X
  • f(1-N)Y represents the comprehensive optical focal length of the first lens to the Nth lens along the Y direction
  • f(1 -N)X represents the comprehensive optical focal length of the first lens to the Nth lens along the X direction.
  • the first lens is the front fixed group of the anamorphic lens, the second lens, the
  • the third lens..., the eleventh lens is the inner focusing group of the anamorphic lens, the twelfth lens
  • the lens and the thirteenth lens are the rear fixed group of the anamorphic lens; wherein, the power distribution of the inner focus group, the front fixed group and the rear fixed group is as follows:
  • the X direction is the curvature direction of the lens
  • the Y direction is the direction perpendicular to X
  • f(1-N)Y represents the comprehensive optical focal length of the first lens to the Nth lens along the Y direction
  • f(1-N)X Indicates the comprehensive optical focal length of the first lens to the Nth lens along the X direction.
  • the sixth lens, the seventh lens, the ninth lens and the thirteenth lens are spherical lenses with negative refractive power
  • the fourth lens, the fifth lens and the eighth lens , the tenth lens, the eleventh lens and the twelfth lens are spherical lenses with positive refractive power.
  • the second lens and the third lens are cemented together.
  • the fifth lens and the sixth lens are cemented together.
  • the seventh lens and the eighth lens are cemented together.
  • the length of the anamorphic lens is less than 120mm.
  • the front end of the anamorphic lens is matched with a 67mm filter.
  • the focal length of the anamorphic lens along the Y direction is 75mm
  • the focal length along the X direction is 56.4mm
  • the aperture is 1.8.
  • the mass of the anamorphic lens is less than 700g.
  • the anamorphic lens provided in this application uses the method of overall design to distribute the optical power of three cylindrical lenses and at least seven spherical lenses to correct the overall aberration, so as to correct the field of view of the lens for horizontal shooting. Increase the width of the actual shooting picture, and because there is no need for post-editing, wide-screen video or photos can be obtained without sacrificing pixels.
  • the anamorphic lens is set as the front fixed group, the inner focus group and the rear fixed group, and the inner focus design is adopted, and the inner focus group moves inside the lens, so that the lens can focus on different object distances.
  • the anamorphic lens provided by this application adopts a compact design integrating a cylindrical surface and a spherical surface, and achieves a large aperture of 1.8 while achieving light weight.
  • the length of the lens is less than 120mm, the front end of the lens is matched with an outer diameter filter of 67mm, and the lens mass is less than 700g.
  • 1 is an optical structure diagram of an anamorphic lens in the X direction in the first embodiment of the application
  • FIG. 2 is a diagram of the optical structure of the anamorphic lens in the Y direction in the first embodiment of the application;
  • FIG. 3 is an optical structure diagram of the anamorphic lens in the X direction in the second embodiment of the application.
  • FIG. 4 is an optical structure diagram of the anamorphic lens in the Y direction in the second embodiment of the present application.
  • the terms “installed”, “connected” and “connected” should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication between two elements.
  • installed should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication between two elements.
  • the anamorphic lens given in this implementation is a 75mm focal length half-frame medium-telephoto large-aperture anamorphic lens.
  • the anamorphic lens consists of thirteen lenses arranged along the optical path from the object side to the image side. , respectively the first lens 1, the second lens 2, the third lens 3, the fourth lens 4, the fifth lens 5, the sixth lens 6, the seventh lens 7, the eighth lens 8, the ninth lens 9, the tenth lens Lens 10 , eleventh lens 11 , twelfth lens 12 and thirteenth lens 13 .
  • the first lens 1 , the second lens 2 and the third lens 3 are cylindrical lenses, and the second lens 2 and the third lens 3 are cemented together.
  • Fourth lens 4 fifth lens 5, sixth lens 6, seventh lens 7, eighth lens 8, ninth lens 9, tenth lens 10, eleventh lens 11, twelfth lens 12 and thirteenth
  • the lenses 13 are all spherical lenses.
  • the first lens 1 in this embodiment is a cylindrical lens with negative refractive power
  • the second lens 2 is a cylindrical lens with negative refractive power
  • the third lens 3 is a cylindrical lens with positive refractive power.
  • the sixth lens 6, the seventh lens 7, the ninth lens 9, and the thirteenth lens 13 are spherical lenses with negative refractive power.
  • the fourth lens 4, the fifth lens 5, the eighth lens 8, the tenth lens 10, the The eleventh lens 11 and the twelfth lens 12 are both spherical lenses with positive refractive power.
  • the fifth lens 5 and the sixth lens 6 are cemented together
  • the seventh lens 7 and the eighth lens 8 are cemented together
  • the ninth lens 9 and the tenth lens 10 are cemented together.
  • the anamorphic lens of this embodiment consists of 13 lenses in 9 groups of lenses.
  • the combination between the second lens 2 and the third lens 3, the fifth lens 5 and the sixth lens 6, the seventh lens 7 and the eighth lens 8, and the ninth lens 9 and the tenth lens 10 is not limited.
  • the bonding method is bonding.
  • the shape of the combined lens is then adapted. should also be included in the protection scope of this application.
  • the curvature direction of the first lens is the X direction
  • the Y direction is the direction perpendicular to the X direction
  • f(1-13)Y represents the comprehensive optical focal length of the lenses 1 to 13 in the Y direction
  • f(1-13)X represents the comprehensive optical focal length of the lenses 1 to 13 in the X direction.
  • the above-mentioned anamorphic lens is used to achieve a focal length of 75mm, and at the same time, the overall design method is used to distribute the power of three cylindrical lenses and at least seven spherical lenses to correct the overall aberration, so that the lens is shot horizontally.
  • the increased field of view increases the width of the actual shot. Since no post-editing is required, wide-screen videos or photos can be obtained without sacrificing pixels.
  • the first to third lenses are cylindrical lenses, and the fourth to thirteen lenses are spherical lenses.
  • the field of view of the lens with a focal length of 75mm and an aperture of 1.8 is: V (vertical) 12.16°, H (horizontal) 18.46°.
  • the field of view of a lens with a focal length of 75 mm and an aperture of 1.8 is: V (vertical) 12.16°, and H (horizontal) 24.70°.
  • the actual wide aspect ratio is in the range of 2.35-2.40, so the anamorphic ratio is 1.33, that is, the horizontal field of view is increased by 33%, enabling 1.33X anamorphic shooting.
  • the length of the anamorphic lens itself can be less than 120mm, matching the general specification filter with an outer diameter of 67mm, and the mass is less than 700g, which is much smaller than the professional film anamorphic lens of the same specification on the market. Reduced size of anamorphic lenses.
  • each lens is made of optical glass.
  • the lens of the present application can be designed to be compatible with the bayonet mounts of various brands of cameras on the market according to the actual use requirements, so as to realize individual customization and universal coordination.
  • this embodiment provides a 75mm focal length half-frame anamorphic lens.
  • the difference from the first embodiment is that the cemented lenses of the original fifth lens 5 and sixth lens 6 are replaced by a positive spherical surface
  • the lens and a negative spherical lens can also achieve the technical effect of the present application, which will not be repeated here.
  • Embodiment 1 and Embodiment 2 on the basis of Embodiment 1 and Embodiment 2, if only a single positive lens or a negative lens is simply split, as long as the power distribution of the split lens group is within the scope of the original scheme, it is an insubstantial innovation .

Abstract

一种变形镜头,包括从物方到像方依次设置的柱面透镜和球面透镜。从物方到像方依次设置的第一透镜(1)、第二透镜(2)和第三透镜(3),第一透镜(1)和第二透镜(2)为负光焦度柱面透镜,第三透镜(3)为正光焦度柱面透镜。利用柱面透镜的光学特性,将进入的水平光线进行"压缩",而垂直方向视场进入的光线保持不变,再经过对光线进行综合像差矫正,水平视场角度增加了33%,从而实现1.33X变形拍摄,这一镜头体积更小,重量更轻,成本相对更低,更能满足大部分普通用户的使用需求。

Description

一种变形镜头 技术领域
本申请涉及镜头技术领域,具体涉及一种75mm焦距半画幅大光圈变形镜头。
背景技术
随着互联网技术的飞速发展,拍照和视频成为普通消费者生活必不可少的一部分。近几年随着5G等技术推动,Vlog等视频分享越来越多,使用手机、相机等工具拍摄短片、微电影人群越来越多。
然而目前市面上手机、平板电脑、相机等设备常规拍摄比例为16:9,而具有电影感的宽荧屏视频的比例为2.4:1。同时好的微电影或视频拍摄需要不同焦段镜头互相配合,特别是对人物进行特写需要中长焦变形镜头。
对此,一些专业变形电影镜头品牌如:德国-霍克(Hawk)、英国-库克(Cooke)、德国-阿莱(ARRI)、美国-潘那维申(Panavison)、法国-安琴(Angenieux)和香港的SLR,但是上述变形镜头通常面向专业级别的客户,不仅价格昂贵,还因其体积、重量原因无法随时携带。
价格昂贵、质量较大的专业变形镜头不适合普通用户使用。因此如何将视频拍摄中非常重要的中长焦大光圈变形镜头体积做小、重量做轻是目前需要解决的技术问题。
发明内容
因此,本申请要解决的技术问题在于克服现有技术中专业中长焦大光圈变形镜头质量较大价格较高而不适合普通用户使用的缺陷,从而提供一种变形镜 头。
为解决上述技术问题,本申请提供一种变形镜头,包括从物方到像方依次设置的柱面透镜组和球面透镜组,所述柱面透镜组依次为第一透镜、第二透镜和第三透镜,所述第一透镜和所述第二透镜为负光焦度柱面透镜,所述第三透镜为正光焦度柱面透镜;所述球面透镜组沿光路指向像方的方向依次设置第四透镜、...、第N透镜,N为大于或等于10的自然数;
构成所述柱面透镜组以及构成所述球面透镜组的光焦度分配满足如下关系:
70mm<f(1-N)Y<80mm;
50mm<f(1-N)X<62mm;
1.20<f(1-N)Y/f(1-N)X<1.40;
其中,所述第一透镜的曲率方向为X方向,Y方向为垂直X的方向,f(1-N)Y表示该第一透镜至第N个透镜沿Y方向的综合光学焦距,f(1-N)X表示该第一透镜至第N透镜沿X方向的综合光学焦距。
进一步地,所述第一透镜为所述变形镜头的前固定组,所述第二透镜、所
述第三透镜...、所述第十一透镜为所述变形镜头的内对焦组,所述第十二
透镜、所述第十三透镜为所述变形镜头的后固定组;其中,所述内对焦组、所述前固定组和所述后固定组光焦度分配如下:
-1.45<f1X/(f1-13)X<-1.20;
0.90<f(2-11)X/f(1-13)X<1.10;
-1.10<f(12-13)X/f(1-13)X<-0.90;
其中,X方向为透镜的曲率方向,Y方向为垂直X的方向,f(1-N)Y表示该第一透镜至第N个透镜沿Y方向的综合光学焦距,f(1-N)X表示该第一透镜至第N透镜沿X方向的综合光学焦距。
进一步地,所述第六透镜、所述第七透镜、所述第九透镜和所述第十三透镜为负光焦度球面透镜,所述第四透镜、第五透镜、所述第八透镜、所述第十 透镜、所述第十一透镜和所述第十二透镜为正光焦度球面透镜。
进一步地,所述第二透镜和所述第三透镜粘合在一起。
进一步地,所述第五透镜和所述第六透镜粘合一起。
进一步地,所述第七透镜和所述第八透镜粘合一起。
进一步地,所述变形镜头的长度小于120mm。
进一步地,所述变形镜头的前端匹配口径67mm滤镜。
进一步地,所述变形镜头沿Y方向焦距为75mm,沿X方向焦距为56.4mm,光圈为1.8。
进一步地,所述变形镜头的质量小于700g。
本申请技术方案,具有如下优点:
1.本申请提供的变形镜头,使用整体设计的方法,将三枚柱面镜片和至少七枚球面镜片的光焦度进行分配,对整体像差实现矫正,从而将镜头水平拍摄的视场角增加,使实际拍摄的画面宽度变大,由于无需进行后期剪辑,在不牺牲像素的前提下也能得到宽荧幕视频或照片。
2.本申请提供的变形镜头中,设置变形镜头为前固定组、内对焦组和后固定,采用内对焦设计,通过内对焦群组在镜头内部运动,进而可实现镜头对不同物距对焦。
3.本申请提供的变形镜头,采用柱面和球面一体化的紧凑设计,在实现大光圈1.8同时实现轻便,其中镜头长度小于120mm,镜头前端匹配外径67mm滤镜,镜头质量小于700g。
附图说明
为了更清楚地说明本申请具体实施方式或现有技术中的技术方案,下面将对具体实施方式或现有技术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方式,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。
图1为本申请的第一种实施例中变形镜头在X方向光学结构图;
图2为本申请的第一种实施例中变形镜头在Y方向光学结构图;
图3为本申请的第二种实施例中变形镜头在X方向光学结构图;
图4为本申请的第二种实施例中变形镜头在Y方向光学结构图。
附图标记说明:
1、第一透镜;2、第二透镜;3、第三透镜;4、第四透镜;5、第五透镜;6、第六透镜;7、第七透镜;8、第八透镜;9、第九透镜;10、第十透镜;11、第十一透镜;12、第十二透镜;13、第十三透镜;14、前固定组;15、内对焦组;16、后固定组。
具体实施方式
下面将结合附图对本申请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。
在本申请的描述中,需要说明的是,术语“中心”、“上”、“下”、“左”、“右”、“竖直”、“水平”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系,仅是为了便于描述本申请和简化描述,而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作,因此不能理解为对本申请的限制。此外,术语“第一”、“第二”、“第三”仅用于描述目的,而不能理解为指示或暗示相对重要性。
在本申请的描述中,需要说明的是,除非另有明确的规定和限定,术语“安装”、“相连”、“连接”应做广义理解,例如,可以是固定连接,也可以是可拆卸连接,或一体地连接;可以是机械连接,也可以是电连接;可以是直接相连,也可以通过中间媒介间接相连,可以是两个元件内部的连通。对于本领域的普通技术人员而言,可以具体情况理解上述术语在本申请中的具体含义。
此外,下面所描述的本申请不同实施方式中所涉及的技术特征只要彼此之间未构成冲突就可以相互结合。
实施例一
如图1和图2所示,本实施中给的变形镜头具体为一种75mm焦距半画幅中长焦大光圈变形镜头,该变形镜头由十三枚透镜沿光路从物方到像方排列构成,分别为第一透镜1、第二透镜2、第三透镜3、第四透镜4、第五透镜5、第六透镜6、第七透镜7、第八透镜8、第九透镜9、第十透镜10、第十一透镜11、第十二透镜12和第十三透镜13。
其中,第一透镜1、第二透镜2、第三透镜3这三枚透镜为柱面透镜,第二透镜2和第三透镜3粘合在一起。第四透镜4、第五透镜5、第六透镜6、第七透镜7、第八透镜8、第九透镜9、第十透镜10、第十一透镜11、第十二透镜12和第十三透镜13均为球面透镜。
具体地,本实施例中的第一透镜1为负光焦度柱面透镜,第二透镜2为负光焦度柱面透镜、第三透镜3为正光焦度柱面透镜。第六透镜6、第七透镜7、第九透镜9、第十三透镜13均为负光焦度球面透镜,第四透镜4,第五透镜5、第八透镜8、第十透镜10、第十一透镜11、第十二透镜12均为正光焦度球面透镜。其中第五透镜5和第六透镜6粘合一起,第七透镜7和第八透镜8粘合一起,第九透镜9和第十透镜10粘合一起。
粘合在一起的透镜看做一个整体,因此,本实施例的变形镜头由13片共9组透镜构成。对于第二透镜2和第三透镜3、第五透镜5和第六透镜6、第七透镜7和第八透镜8、第九透镜9和第十透镜10之间的结合方式不做具体限制,本实施例中,结合的方式为粘合。作为可替换的实施方式,基于本申请的构思,为了与本申请进行区别,而对上述结合方式进行改变后,如贴合、一体成型等结合方式,再对结合后的透镜形状进行适应性变更的,也应纳入本申请的保护范围中。
对于各个透镜的实际参数的具体数值,不做具体限制,本实施例中,各 透镜或透镜组的光焦度均满足下列数学关系:
70mm<f(1-12)Y<80mm;
50mm<f(1-12)X<62mm;
1.20<f(1-12)Y/f(1-12)X<1.40;
-1.45<f1X/(f1-13)X<-1.20;
0.90<f(2-11)X/f(1-13)X<1.10;
-1.10<f(12-13)X/f(1-13)X<-0.90;
其中,所述第一透镜的曲率方向为X方向,Y方向为垂直X的方向,同X方向成90度。f(1-13)Y表示该镜头1至13个透镜Y方向综合光学焦距,f(1-13)X表示该镜头1至13个透镜X方向综合光学焦距。
进而采用上述变形镜头,在实现75mm焦距的同时,使用整体设计的方法,将三枚柱面镜片和至少七枚球面镜片的光焦度进行分配,对整体像差实现矫正,从而将镜头水平拍摄的视场角增加,使实际拍摄的画面宽度变大,由于无需进行后期剪辑,在不牺牲像素的前提下也能得到宽荧幕视频或照片。
下面列出符合上述数学关系的本实施例的各个透镜实际参数:
透镜 面型 X半径(mm) Y半径(mm) 厚度(mm) 折射率 阿贝数 质量(g)
第一透镜 柱面 -72.150 inf 3.400 1.48 70.44 约25
  柱面 77.630 inf 9.800      
第二透镜 柱面 -300.000 inf 13.020 1.65 36.0 约70
第三透镜 柱面 66.660 inf 9.630 1.80 46.6 约60
  柱面 -87.720 -inf 1.200      
第四透镜 球面 52.040 52.040 5.780 1.95 18.2 约20
  球面 154.690 154.690 0.220      
第五透镜 球面 26.995 26.995 8.780 1.68 55.6 约20
第六透镜 球面 180.535 180.535 1.750 1.86 23.8 约15
  球面 20.287 20.287 15.300      
光栏       1.400      
第七透镜 球面 42.400 42.400 1.500 1.95 18.2 约5
第八透镜 球面 14.810 14.810 6.070 1.80 46.6 约7
  球面 78.840 78.840 2.650      
第九透镜 球面 -42.150 -42.150 1.600 1.87 24.1 约6
第十透镜 球面 20.150 20.150 7.200 1.92 19.1 约7
  球面 -43.906 -43.906 11.757      
第十一透镜 球面 162.190 162.190 3.320 1.69 47.4 约4
    -71.726 -71.726 1.890      
第十二透镜 球面 -53.184 -53.184 3.020 1.74 28.0 约3
  球面 -30.740 -30.740 5.490      
第十三透镜 球面 -23.565 -23.565 1.600 1.77 50.1 约4
  球面 -181.410 -181.410 18.000      
其中,第一~三透镜为柱面透镜,第四~十三透镜为球面透镜。
在采用本实施例的变形镜头前,75mm焦距1.8光圈的镜头的视场角度为:V(竖直)12.16°,H(水平)18.46°。
采用本实施例的变形镜头后,75mm焦距1.8光圈的镜头的视场角度为:V(竖直)12.16°,H(水平)24.70°。
对比测试视场角度竖直方向视场角度不变,水平方向视场角度变形比为:24.70/18.46=1.338。
实际宽幅比例在2.35-2.40范围内,因此变形比为1.33,即水平视场角度增加了33%,从而实现1.33X变形拍摄。
从上述表格可知,本实施例的变形镜头在制作时,变形镜头本身长度可小于120mm,匹配外径67mm通用规格滤镜,质量小于700g,远小于市面上同规格的专业电影变形镜头,极大减轻了变形镜头的尺寸。
其中,对于各个透镜的制作材料,不做具体限制,本实施例中,各透镜均采用光学玻璃制成。
本申请的透镜可根据实际使用需求设计兼容匹配市面上各品牌相机的卡口,以实现个性化定制和配合通用。
实施例二
如图3和图4所示,本实施例提供一种75mm焦距半画幅变形镜头,与实施例一的区别在于,将原第五透镜5和第六透镜6的粘合透镜替换为一个正球面透镜和一个负球面透镜,同样能够实现本申请的技术效果,在此不再赘述。
本实施例在实施例一和实施例二的基础上,如果只是将单个正透镜或者负透镜进行简单拆分,只要拆分后的镜片组光焦度分配在原方案范围内即属于没有实质的创新。
这里无需也无法对所有的实施方式予以穷举。而由此所引伸出的显而易见的变化或变动仍处于本发明创造的保护范围之中。

Claims (10)

  1. 一种变形镜头,其特征在于,包括从物方到像方依次设置的柱面透镜组和球面透镜组,所述柱面透镜组依次为第一透镜、第二透镜和第三透镜,所述第一透镜和所述第二透镜为负光焦度柱面透镜,所述第三透镜为正光焦度柱面透镜;所述球面透镜组沿光路指向像方的方向依次设置第四透镜、...、第N透镜,N为大于或等于10的自然数;
    构成所述柱面透镜组以及构成所述球面透镜组的光焦度分配满足如下关系:
    70mm<f(1-N)Y<80mm;
    50mm<f(1-N)X<62mm;
    1.20<f(1-N)Y/f(1-N)X<1.40;
    其中,所述第一透镜的曲率方向为X方向,Y方向为垂直X的方向,f(1-N)Y表示该第一透镜至第N个透镜沿Y方向的综合光学焦距,f(1-N)X表示该第一透镜至第N透镜沿X方向的综合光学焦距。
  2. 根据权利要求1所述的变形镜头,其特征在于,所述第一透镜为所述变形镜头的前固定组,所述第二透镜、所述第三透镜...、所述第十一透镜为所述变形镜头的内对焦组,所述第十二透镜、所述第十三透镜为所述变形镜头的后固定组;其中,所述内对焦组、所述前固定组和所述后固定组光焦度分配如下:
    -1.45<f1X/(f1-13)X<-1.20;
    0.90<f(2-11)X/f(1-13)X<1.10;
    -1.10<f(12-13)X/f(1-13)X<-0.90;
    其中,所述第一透镜的曲率方向为X方向,Y方向为垂直X的方向,f(1-N)Y表示该第一透镜至第N个透镜沿Y方向的综合光学焦距,f(1-N)X表示该第一透镜至第N透镜沿X方向的综合光学焦距。
  3. 根据权利要求2所述的变形镜头,其特征在于,所述第六透镜、所述第 七透镜、所述第九透镜和所述第十三透镜为负光焦度球面透镜,所述第四透镜、第五透镜、所述第八透镜、所述第十透镜、所述第十一透镜和所述第十二透镜为正光焦度球面透镜。
  4. 根据权利要求1-3中任意一项所述的变形镜头,其特征在于,所述第二透镜和所述第三透镜粘合在一起。
  5. 根据权利要求1-3中任意一项所述的变形镜头,其特征在于,所述第五透镜和所述第六透镜粘合一起。
  6. 根据权利要求1-3中任意一项所述的变形镜头,其特征在于,所述第七透镜和所述第八透镜粘合一起。
  7. 根据权利要求1-3中任意一项所述的变形镜头,其特征在于,所述变形镜头的长度小于120mm。
  8. 根据权利要求7所述的变形镜头,其特征在于,所述变形镜头的前端匹配口径67mm滤镜。
  9. 根据权利要求1-3中任意一项所述的变形镜头,其特征在于,所述变形镜头沿Y方向焦距为75mm,沿X方向焦距为56.4mm,光圈为1.8。
  10. 根据权利要求1-3中任意一项所述的变形镜头,其特征在于,所述变形镜头的质量小于700g。
PCT/CN2020/101859 2019-09-26 2020-07-14 一种变形镜头 WO2022006925A1 (zh)

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CN110716290A (zh) * 2019-09-26 2020-01-21 广东思锐光学股份有限公司 一种变形镜头
CN210690928U (zh) * 2019-09-26 2020-06-05 广东思锐光学股份有限公司 一种变形镜头
CN210835410U (zh) * 2019-11-27 2020-06-23 广东思锐光学股份有限公司 一种大光圈变形镜头
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CN104007541A (zh) * 2014-05-04 2014-08-27 南京邮电大学 一种变形投影镜头
DE102018113136A1 (de) * 2018-06-01 2019-12-05 Carl Zeiss Optotechnik GmbH Kameramodul und Kamerasystem mit einem Kameramodul
CN110716290A (zh) * 2019-09-26 2020-01-21 广东思锐光学股份有限公司 一种变形镜头
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