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:
Mar. 03, 2020
Filed:
Aug. 16, 2018
Zhongshan Institute of Modern Industrial Technology, South China University of Technology, Guangdong, CN;
Abstract
The present invention provides a double freeform-surface lens with uniform color temperature including an incident free surface, an emergent freeform-surface and a side connecting face. The side connecting face is a side wall connecting the incident freeform-surface and the emergent freeform-surface. Aiming at impacts of using the single lens on color temperature upon LED light distribution, the double freeform-surface lens is designed, which is fabricated from a transparent optical material. The transparent material is PC or PMMA or optical glass. The double freeform-surface lens is capable of controlling a light distribution angle, and light spots obtained have uniform color temperature.