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:
Nov. 26, 2019
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 includes a first lens, a second lens and a diaphragm from an object side to an image side of the assembly 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 positive focal power, and an image side surface thereof is convex; optical centers of the first lens and the second lens are arranged along a same straight line, the system meets following formulas: f1>f2; (dn/dt)1<−50×10/° C.; (dn/dt)2>−10×10/° C., where f1 represents a focal length of the first lens, f2 represents a focal length of the second lens, (dn/dt)1 represents a change rate of a refractive index of the first lens with temperature, and (dn/dt)2 represents a change rate of a refractive index of the second lens with temperature.