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:
Feb. 16, 2021
Filed:
Dec. 31, 2019
Applicant:
Christie Digital Systems Usa, Inc., Cypress, CA (US);
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B 21/14 (2006.01); H04N 5/74 (2006.01); G02B 26/08 (2006.01); G02B 5/04 (2006.01);
U.S. Cl.
CPC ...
H04N 5/7458 (2013.01); G02B 26/0833 (2013.01); G03B 21/142 (2013.01); G02B 5/04 (2013.01);
Abstract
An exit aperture is set forth for placement between a prism and a projection lens capable of projecting light on a screen, comprising a frame with an opening for passing a cone of light and mounting points for securing the frame relative to the projection lens, wherein the opening has serrated edges for diffracting light incident thereon in multiple directions perpendicular to the serrated edges so as to be imperceptible when projected on the screen.