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:
Apr. 19, 2022
Filed:
Jan. 03, 2018
Applicant:
3m Innovative Properties Company, St. Paul, MN (US);
Inventors:
Robert M. Emmons, St. Paul, MN (US);
Kenneth A. Epstein, St. Paul, MN (US);
Assignee:
3M Innovative Properties Company, St. Paul, MN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 5/04 (2006.01); F21V 5/02 (2006.01); G02B 5/02 (2006.01); F21V 8/00 (2006.01);
U.S. Cl.
CPC ...
G02B 5/045 (2013.01); F21V 5/02 (2013.01); G02B 5/0278 (2013.01); G02B 6/0053 (2013.01);
Abstract
An optical system including a light guide and a turning film that includes a first major surface, where the first major surface is substantially smooth and a second major surface including a plurality of asymmetric microstructures each respective asymmetric microstructure including a first side, where the first side is substantially planar, and a second side including a first surface segment defining a substantially planar surface and a second surface segment defining a non-planar surface.