US Patent 7316497 Fluorescent volume light source

Patent 7316497 was granted and assigned to 3M on January, 2008 by the United States Patent and Trademark Office.

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Is a

Patent

Patent attributes

Current Assignee

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

73164970

Patent Inventor Names

R. Edward English, Jr.0

Todd S. Rutherford0

Date of Patent

January 8, 2008

Patent Application Number

110922840

Date Filed

March 29, 2005

Patent Primary Examiner

‌

Ali Alavi

Patent 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 also includes a body containing a fluorescent material that emits light in a second wavelength range, different from the first wavelength range, when illuminated by light in the first wavelength range. The 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.