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:
Jun. 02, 2020
Filed:
Mar. 19, 2018
Applicant:
3m Innovative Properties Company, St. Paul, MN (US);
Inventors:
Stephen J. Willett, St. Paul, MN (US);
Craig R. Schardt, Woodbury, MN (US);
David J. W. Aastuen, Shoreview, MN (US);
Assignee:
3M Innovative Properties Company, St. Paul, MN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B 21/20 (2006.01); G02B 27/28 (2006.01); H04N 9/31 (2006.01); G02B 5/30 (2006.01); G02B 13/16 (2006.01);
U.S. Cl.
CPC ...
G02B 27/283 (2013.01); G02B 5/3025 (2013.01); G02B 13/16 (2013.01); H04N 9/3167 (2013.01); G03B 21/20 (2013.01);
Abstract
Projection subsystems are described. More, particularly, projection subsystems that include a light source and a polarizing beam splitter are described. The polarizing beam splitters of the presently described projection subsystems are capable of avoiding performance degradation even after exposure to large doses of incident light.