Processing

Please wait...

Settings

Settings

Goto Application

1. EP3252519 - ZOOM LENS, OPTICAL APPARATUS, AND ZOOM LENS PRODUCTION METHOD

Office
European Patent Office
Application Number 16743558
Application Date 29.01.2016
Publication Number 3252519
Publication Date 06.12.2017
Publication Kind B1
IPC
G02B 15/14
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
G02B 27/64
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
27Optical systems or apparatus not provided for by any of the groups G02B1/-G02B26/119
64Imaging systems using optical elements for stabilisation of the lateral and angular position of the image
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 CORP
Inventors UMEDA TAKESHI
Designated States
Priority Data 2015017212 30.01.2015 JP
Title
(DE) ZOOMOBJEKTIV, OPTISCHE VORRICHTUNG UND ZOOMOBJEKTIVHERSTELLUNGSVERFAHREN
(EN) ZOOM LENS, OPTICAL APPARATUS, AND ZOOM LENS PRODUCTION METHOD
(FR) OBJECTIF À FOCALE VARIABLE, APPAREIL OPTIQUE, ET PROCÉDÉ DE FABRICATION D'UN OBJECTIF À FOCALE VARIABLE
Abstract
(EN) A zoom lens includes, in order from an object along an optical axis: a first lens group having a negative refractive power; a second lens group having a positive refractive power; a third lens group having a negative refractive power; a fourth lens group; and a fifth lens group, the first to fifth lens groups. When the zoom lens performs varying magnification, the distance between the first and second lens groups changes, the distance between the second and third lens groups changes, the distance between the third and fourth lens groups changes, the distance between the fourth and fifth lens groups changes, the second and fourth lens groups move along the same trajectory along the optical axis, and at least the third lens group moves along the optical axis.
(FR) La présente invention concerne un objectif à focale variable qui comprend, dans l'ordre le long de son axe optique en partant d'un côté objet, un premier groupe de lentilles ayant une réfringence négative, un deuxième groupe de lentilles possédant une réfringence positive, un troisième groupe de lentilles ayant une réfringence négative, un quatrième groupe de lentilles, et un cinquième groupe de lentilles. Pendant la variation de puissance, l'intervalle entre le premier groupe de lentilles et le deuxième groupe de lentilles varie, l'intervalle entre ce deuxième groupe de lentilles et le troisième groupe de lentilles varie, l'intervalle entre ledit troisième groupe de lentilles et le quatrième groupe de lentilles varie, l'intervalle entre ce quatrième groupe de lentilles et le cinquième groupe de lentilles varie, le deuxième groupe de lentilles et le quatrième groupe de lentilles se déplacent le long de l'axe optique sur la même trajectoire, et au moins le troisième groupe de lentilles se déplace le long de l'axe optique.
Related patent documents
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.