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. 27, 2001
Filed:
Nov. 25, 1998
Yaoqi Joe Liu, Maplewood, MN (US);
Bruce A. Nerad, Oakdale, MN (US);
Laurence R. Gilbert, Marine on St. Croix, MN (US);
Robert L. Brott, Woodbury, MN (US);
Michael F. Weber, Shoreview, MN (US);
Kelly M. Roscoe, Orono, MN (US);
John A. Wheatley, Ascot Berkshire, GB;
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
In a multilayer dielectric reflector, treating the surface of the reflector selectively increases the amount of light transmitted through the reflector. Various surface treatments can be used to permit light to transmit through the reflector that would otherwise be reflected by the reflector. In one such reflector, different portions of the surface have different coupling efficiencies for coupling light having a high propagation angle into the multilayer reflector. Those portions having higher coupling efficiencies on each side of the reflector have a higher degree of transmission.