The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 26, 2019
Filed:
Aug. 07, 2014
Han's Laser Technology Industry Group Co., Ltd., Shenzhen, Guangdong, CN;
Jiaying Li, Guangdong, CN;
Chaoming Zhou, Guangdong, CN;
Bo Sun, Guangdong, CN;
Yunfeng Gao, Guangdong, CN;
HAN'S LASER TECHNOLOGY INDUSTRY GROUP CO., LTD., Shenzhen, Guangdong, CN;
Abstract
A far infrared detector and objective lens and lens set thereof. The far infrared imaging lens set () comprises a first lens () and a second lens () arranged in sequence along a principal axis; the first lens () has a first curved surface () having a radius of curvature of 2.4×(1±5%) mm and a second curved surface () having a radius of curvature of 2×(1±5%) mm; the second lens () has a third curved surface () having a radius of curvature of 50×(1±5%) mm and a fourth curved surface () having a radius of curvature of 60×(1±5%) mm; wherein the first curved surface (), the second curved surface (), the third curved surface (), and the fourth curved surface () are arranged in sequence; the first curved surface (), the second curved surface () and the third curved surface () are all convex to the object side, and the fourth curved surface is convex to the image side. Distant targets can be detected in dark and foggy environments, and imaging capability is high.