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:
Oct. 06, 2015
Filed:
Jan. 27, 2009
Todd S. Rutherford, Wyoming, OH (US);
Roy A. Auerbach, Cincinnati, OH (US);
Todd S. Rutherford, Wyoming, OH (US);
Roy A. Auerbach, Cincinnati, OH (US);
3M INNOVATIVE PROPERTIES COMPANY, Saint Paul, MN (US);
Abstract
An illumination system, such as might be used for illuminating a projection system, includes at least a first source of incoherent light capable of generating light in a first wavelength range. The system includes at least one active chromophore layer, sandwiched by transparent materials into a multi-layer body. They active chromophore layer emits light in a second wavelength range, different from the first wavelength range, when illuminated by light in the first wavelength range. The multi-layer body has an extraction area and at least some of the light at the second wavelength is internally reflected within the body to the extraction area.