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1. US20180088301 - Imaging lens and imaging apparatus

Office United States of America
Application Number 15712235
Application Date 22.09.2017
Publication Number 20180088301
Publication Date 29.03.2018
Grant Number 10139590
Grant Date 27.11.2018
Publication Kind B2
IPC
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 13/00
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
13Optical objectives specially designed for the purposes specified below
CPC
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 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
Applicants FUJIFILM Corporation
Inventors Ryoko Otomo
Michio Cho
Agents Studebaker & Brackett PC
Priority Data 2016185169 23.09.2016 JP
Title
(EN) Imaging lens and imaging apparatus
Abstract
(EN)

Provided are an imaging lens, which has a small F number and in which various aberrations are satisfactorily corrected, and an imaging apparatus including the imaging lens.

The imaging lens includes, in order from an object side: a first lens that has a biconcave shape; a second lens that is convex toward an image side and has a positive refractive power; a third lens that has a biconvex shape; a fourth lens that has a negative refractive power; a fifth lens that has a positive refractive power; and a sixth lens that has a negative refractive power. Assuming that L1f and L1r are paraxial radii of curvature of an object side surface and an image side surface of the first lens, Conditional Expression (1) is satisfied.
0.1<(L1f+L1r)/(L1f−L1r)<0.8  (1)

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