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. 18, 2022
Filed:
Dec. 08, 2017
Goertek Inc., Shandong, CN;
Lebao Yang, Shandong, CN;
GOERTEK INC., Shandong, CN;
Abstract
A speckle elimination apparatus, a laser light source and a laser projection system, the speckle elimination apparatus comprising a diaphragm () and a ¼ wave plate group sequentially arranged on a laser beam optical path, the ¼ wave plate group comprising a first ¼ wave plate () and a second ¼ wave plate () having optical axis angles of 75°-105°, adjacent sides of the first ¼ wave plate () and the second ¼ wave plate () being closely arranged, the first ¼ wave plate () being arranged so as to allow a portion of an incident laser beam to pass through, the second ¼ wave plate () being arranged so as to allow the remainder of the incident laser beam to pass through, the portion of the incident laser beam being 25%-75% of the incident laser beam. The speckle elimination apparatus eliminates the phenomenon of laser speckle.