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1. CN111458856 - Zoom lens and optical apparatus

Office
China
Application Number 202010180906.1
Application Date 29.01.2016
Publication Number 111458856
Publication Date 28.07.2020
Publication Kind A
IPC
G02B 15/177
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
15Optical objectives with means for varying the magnification
14by 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
16with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group
177having a negative front lens or group of lenses
G02B 15/20
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
15Optical objectives with means for varying the magnification
14by 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
16with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group
20having an additional movable lens or lens group for varying the objective focal length
CPC
G02B 15/177
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
15Optical objectives with means for varying the magnification
14by 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
16with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group
177having a negative front lens or group of lenses
G02B 15/145527
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
15Optical objectives with means for varying the magnification
14by 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
145having five groups only
1455the first group being negative
145527arranged -+-++
G02B 27/646
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
27Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
64Imaging systems using optical elements for stabilisation of the lateral and angular position of the image
646compensating for small deviations, e.g. due to vibration or shake
G02B 9/60
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
9Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or -
60having five components only
G02B 13/02
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
13Optical objectives specially designed for the purposes specified below
02Telephoto objectives, i.e. systems of the type + - in which the distance from the front vertex to the image plane is less than the equivalent focal length
G02B 27/0025
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
27Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
0025for optical correction, e.g. distorsion, aberration
Applicants NIKON CORPORATION
株式会社尼康
Inventors UMEDA TAKESHI
梅田武
Agents 中原信达知识产权代理有限责任公司 11219
中原信达知识产权代理有限责任公司 11219
Priority Data 2015-017212 30.01.2015 JP
Title
(EN) Zoom lens and optical apparatus
(ZH) 变焦镜头以及光学设备
Abstract
(EN) The invention provides a zoom lens and an optical apparatus. This zoom lens is provided with, in order from the object side along the optical axis: a first lens group having negative refractive power;a second lens group having a positive refractive power; a third lens group having a negative refractive power; and a fourth lens group, zoom, the interval between the first lens group and the secondlens group changes. The interval between the second lens group and the third lens group changes. The interval between the third lens group and the fourth lens group varies, and satisfies the followingconditional expressions: 1.500 <(-f3)/fw<10,000), wherein f3 is the focal length of the third lens group, and fw is the focal length of the entire system of the zoom lens in a wide-angle end state.
(ZH) 本发明提供一种变焦镜头以及光学设备。变焦镜头沿着光轴从物体侧依次具备:具有负的光焦度的第1透镜组;具有正的光焦度的第2透镜组;具有负的光焦度的第3透镜组;以及第4透镜组,在进行变倍时,所述第1透镜组与所述第2透镜组之间的间隔变化,所述第2透镜组与所述第3透镜组之间的间隔变化,所述第3透镜组与所述第4透镜组之间的间隔变化,且满足以下的条件式:1.500<(‑f3)/fw<10.000其中,f3:所述第3透镜组的焦距,fw:广角端状态下的所述变焦镜头整个系统的焦距。
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IN201717030597This application is not viewable in PATENTSCOPE because the national phase entry has not been published yet or the national entry is issued from a country that does not share data with WIPO or there is a formatting issue or an unavailability of the application.