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:
Jul. 07, 2020
Filed:
Apr. 02, 2018
Jiangxi Lianchuang Electronic Co., Ltd., Nanchang, CN;
Xuming Liu, Nanchang, CN;
Kemin Wang, Nanchang, CN;
Jiyong Zeng, Nanchang, CN;
Haojie Zeng, Nanchang, CN;
Yumin Bao, Nanchang, CN;
Weijian Chen, Nanchang, CN;
JIANGXI LIANCHUANG ELECTRONIC CO., LTD., Nanchang, CN;
Abstract
A collimator lens system includes a first lens, a second lens, a third lens and a diaphragm from an object side to an image side of the system in turn along an optical axis, in which the first lens is of a positive focal power, and an object side surface thereof is convex; the second lens is of a negative focal power; the third lens is of a positive focal power, and an image side surface thereof is convex; optical centers of all the lenses are arranged along a same straight line, the system meets following formulas: f12>f3; (dn/dt)1<−50×10/° C.; (dn/dt)2<−50×10/° C.; (dn/dt)3>−10×10/° C., where f12 represents a combined focal length of the first and second lenses, f3 represents a focal length of the third lens, and (dn/dt)1, (dn/dt)2, and (dn/dt)3 represent change rates of refractive indices of the first lens, the second lens and the third lens with temperature, respectively.