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1. (WO2018101520) FAR-INFRARED WIDE FIELD OF VIEW OPTICAL SYSTEM HAVING MINIMIZED IMAGE DISTORTION

Pub. No.:    WO/2018/101520    International Application No.:    PCT/KR2016/014218
Publication Date: Fri Jun 08 01:59:59 CEST 2018 International Filing Date: Wed Dec 07 00:59:59 CET 2016
IPC: G01J 1/04
G01J 5/08
G02B 3/04
G02B 3/00
Applicants: TOPINS CO.,LTD.
(주)토핀스
Inventors: KIM, Hyun Kyu
김현규
KIM, Jung Hyun
김정현
Title: FAR-INFRARED WIDE FIELD OF VIEW OPTICAL SYSTEM HAVING MINIMIZED IMAGE DISTORTION
Abstract:
The present invention relates to a far-infrared wide field of view optical system having a minimized image distortion, comprising four lenses (L1, L2, L3, L4) sequentially arranged from an object side. The respective lenses (L1, L2, L3, L4) form aspherical surfaces so as to minimize image distortion, wherein the aspherical surfaces are formed on a front surface (S1) of the lens (L1), a front surface (S1) and a rear surface (S2) of the lens (L2), a rear surface (S2) of the lens (L3), and a rear surface (S2) of the lens (L4). Changes in object shape caused by image distortion can be minimized with an image distortion rate of less than 2%.