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1. WO2019116563 - OPTICAL SYSTEM, OPTICAL EQUIPMENT, AND OPTICAL-SYSTEM MANUFACTURING METHOD

Publication Number WO/2019/116563
Publication Date 20.06.2019
International Application No. PCT/JP2017/045183
International Filing Date 15.12.2017
IPC
G02B 13/00 2006.01
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
13Optical objectives specially designed for the purposes specified below
G02B 13/02 2006.01
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 13/04 2006.01
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
13Optical objectives specially designed for the purposes specified below
04Reversed telephoto objectives
G02B 15/20 2006.01
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 13/00
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
13Optical objectives specially designed for the purposes specified below
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 13/04
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
13Optical objectives specially designed for the purposes specified below
04Reversed telephoto objectives
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
Applicants
  • 株式会社ニコン NIKON CORPORATION [JP]/[JP]
Inventors
  • 山下 雅史 YAMASHITA, Masashi
  • 伊藤 智希 ITO, Tomoki
  • 籔本 洋 YABUMOTO, Hiroshi
  • 山本 浩史 YAMAMOTO, Hiroshi
  • 三輪 哲史 MIWA, Satoshi
  • 坪野谷 啓介 TSUBONOYA, Keisuke
  • 槇田 歩 MAKIDA, Ayumu
  • 上原 健 UEHARA, Takeru
Agents
  • 大西 正悟 OHNISHI, Shogo
  • 川野 宏 KAWANO, Hiroshi
  • 並木 敏章 NAMIKI, Toshiaki
Priority Data
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) OPTICAL SYSTEM, OPTICAL EQUIPMENT, AND OPTICAL-SYSTEM MANUFACTURING METHOD
(FR) SYSTÈME OPTIQUE, ÉQUIPEMENT OPTIQUE ET PROCÉDÉ DE FABRICATION D'UN SYSTÈME OPTIQUE
(JA) 光学系、光学機器、および光学系の製造方法
Abstract
(EN)
An optical system (LS) includes an aperture stop (S), and a positive lens (L13) that is disposed farther on the object side than the aperture stop (S) is and that satisfies the following conditional expressions: ndP1+(0.01425×νdP1) < 2.12; 18.0 < νdP1 < 35.0; and 0.702 < θgFP1+(0.00316×νdP1), where ndP1 is the refractive index of the positive lens with respect to the d-line, νdP1 is the Abbe number of the positive lens with reference to the d-line, and θgFP1 is the partial dispersion ratio of the positive lens. θgFP1 is defined by the following equation: θgFP1 = (ngP1-nFP1)/(nFP1-nCP1), assuming that the refractive index of the positive lens with respect to the g-line is ngP1, the refractive index of the positive lens with respect to the F-line is nFP1, and the refractive index of the positive lens with respect to the C-line is nCP1.
(FR)
L'invention concerne un système optique (LS) qui comprend un diaphragme (S) et une lentille convergente (L13) qui est disposée plus loin que le diaphragme (S) sur le côté objet et qui satisfait les expressions conditionnelles suivantes : ndP1 + (0,01425 × νdP1) < 2,12; 18,0 < νdP1 < 35,0; et 0,702 < θgFP1 + (0,00316 × νdP1), ndP1 représentant l'indice de réfraction de la lentille convergente par rapport à la ligne d, νdP1 représentant le nombre d'Abbe de la lentille convergente par rapport à la ligne d et θgFP1 représentant le rapport de dispersion partielle de la lentille convergente. θgFP1 est défini par l'équation suivante : θgFP1 = (ngP1 - nFP1) / (nFP1 - nCP1), partant de l'hypothèse que l'indice de réfraction de la lentille convergente par rapport à la ligne g est ngP1, l'indice de réfraction de la lentille convergente par rapport à la ligne F est nFP1 et l'indice de réfraction de la lentille convergente par rapport à la ligne C est nCP1.
(JA)
光学系(LS)は、開口絞り(S)と、開口絞り(S)より物体側に配置された以下の条件式を満足する正レンズ(L13)とを有している。 ndP1+(0.01425×νdP1)<2.12 18.0<νdP1<35.0 0.702<θgFP1+(0.00316×νdP1) 但し、ndP1:正レンズのd線に対する屈折率 νdP1:正レンズのd線を基準とするアッベ数 θgFP1:正レンズの部分分散比であり、正レンズのg線に対する屈折率をngP1とし、正レンズのF線に対する屈折率をnFP1とし、正レンズのC線に対する屈折率をnCP1としたとき、次式で定義される θgFP1=(ngP1-nFP1)/(nFP1-nCP1)
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