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. 03, 2009
Filed:
Aug. 14, 2007
John A. Wheatley, Lake Elmo, MN (US);
Andrew J. Ouderkirk, Woodbury, MN (US);
Michael F. Weber, Shoreview, MN (US);
Kenneth A. Epstein, St. Paul, MN (US);
James E. Watson, Maplewood, MN (US);
John A. Wheatley, Lake Elmo, MN (US);
Andrew J. Ouderkirk, Woodbury, MN (US);
Michael F. Weber, Shoreview, MN (US);
Kenneth A. Epstein, St. Paul, MN (US);
James E. Watson, Maplewood, MN (US);
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
An illumination system including a light source, a light guide including an output surface, emissive material positioned between the light source and the output surface of the light guide, and an interference reflector positioned between the emissive material and the output surface of the light guide is disclosed. The light source emits light having a first optical characteristic. The emissive material emits light having a second optical characteristic when illuminated with light having the first optical characteristic. The interference reflector substantially transmits light having the second optical characteristic and substantially reflects light having the first optical characteristic.