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:
Oct. 05, 2021
Filed:
Dec. 20, 2018
Zhejiang Sunny Optical Co., Ltd., Ningbo, CN;
Lin Huang, Ningbo, CN;
Xinquan Wang, Ningbo, CN;
Abstract
The present disclosure discloses a projection lens assembly. The projection lens assembly includes, sequentially along an optical axis from an image-source side to an image side, a first lens having a positive refractive power or a negative refractive power; a second lens having a positive refractive power or a negative refractive power; and a third lens having a positive refractive power, wherein an image-side surface of the first lens is a convex surface. A distance TTL on the optical axis from an image-source plane of the projection lens assembly to the image-side surface of the third lens and a total effective focal length f of the projection lens assembly satisfy: TTL/f<1.4. An effective focal length f3 of the third lens and the total effective focal length f of the projection lens assembly satisfy: 0<f3/f<18.0.