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1. JP2018049188 - IMAGE CAPTURING LENS AND IMAGE CAPTURING DEVICE

Office Japan
Application Number 2016185169
Application Date 23.09.2016
Publication Number 2018049188
Publication Date 29.03.2018
Grant Number 6753749
Grant Date 24.08.2020
Publication Kind B2
IPC
G02B 13/04
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
13Optical objectives specially designed for the purposes specified below
04Reversed telephoto objectives
G02B 13/18
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
13Optical objectives specially designed for the purposes specified below
18with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
CPC
G02B 9/62
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 -
62having six components only
G02B 13/0045
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
13Optical objectives specially designed for the purposes specified below
001Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
0015characterised by the lens design
002having at least one aspherical surface
0045having five or more lenses
G02B 13/04
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
13Optical objectives specially designed for the purposes specified below
04Reversed telephoto objectives
G02B 13/18
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
13Optical objectives specially designed for the purposes specified below
18with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
Applicants FUJIFILM CORP
天津欧菲光電有限公司
Inventors OTOMO RYOKO
大友 涼子
CHO MICHIO
長 倫生
Agents 特許業務法人コスモス国際特許商標事務所
Title
(EN) IMAGE CAPTURING LENS AND IMAGE CAPTURING DEVICE
(JA) 撮像レンズおよび撮像装置
Abstract
(EN)

PROBLEM TO BE SOLVED: To provide an image capturing lens that offers a small F-number and good correction for aberrations, and to provide an image capturing device having the same.

SOLUTION: An image capturing lens comprises, in order from the object side, a biconcave first lens L1, a second lens L2 having a convex surface on the image side and positive refractive power, a biconvex third lens L3, a fourth lens L4 having negative refractive power, a fifth lens L5 having positive refractive power, and a sixth lens L6 having negative refractive power. Paraxial curvature radii L1f, L1r of object-side and image-side surfaces of the first lens L1 satisfy the following conditional expression (1): 0.1<(L1f+L1r)/(L1f-L1r)<0.8 ...(1).

SELECTED DRAWING: Figure 1

COPYRIGHT: (C)2018,JPO&INPIT

(JA)

【課題】F値が小さく、諸収差が良好に補正された撮像レンズ、およびこの撮像レンズを備えた撮像装置を提供する。
【解決手段】撮像レンズは、物体側から順に、両凹形状の第1レンズL1、像側に凸面を向けた正の屈折力を有する第2レンズL2、両凸形状の第3レンズL3、負の屈折力を有する第4レンズL4、正の屈折力を有する第5レンズL5、および負の屈折力を有する第6レンズL6からなる。L1f、L1rを、それぞれ第1レンズL1の物体側、像側の面の近軸曲率半径としたとき、下記条件式(1)を満足する。
0.1<(L1f+L1r)/(L1f−L1r)<0.8 (1)
【選択図】図1