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:
Dec. 25, 2012
Filed:
Dec. 09, 2008
Xiaoguang Sun, Woodbury, MN (US);
Michael A. Haase, St. Paul, MN (US);
Thomas J. Miller, Woodbury, MN (US);
Terry L. Smith, Roseville, MN (US);
Tommie W. Kelley, Shoreview, MN (US);
Catherine A. Leatherdale, Woodbury, MN (US);
Xiaoguang Sun, Woodbury, MN (US);
Michael A. Haase, St. Paul, MN (US);
Thomas J. Miller, Woodbury, MN (US);
Terry L. Smith, Roseville, MN (US);
Tommie W. Kelley, Shoreview, MN (US);
Catherine A. Leatherdale, Woodbury, MN (US);
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
An arrangement of light sources is attached to a semiconductor wavelength converter. Each light source emits light at a respective peak wavelength, and the arrangement of light sources is characterized by a first range of peak wavelengths. The semiconductor wavelength converter is characterized by a second range of peak wavelengths when pumped by the arrangement of light sources. The second range of peak wavelengths is narrower than the first range of peak wavelengths. The semiconductor wavelength converter is characterized by an absorption edge having a wavelength longer than the longest peak wavelength of the light sources. The wavelength converter may also be used for reducing the wavelength variation in the output from an extended light source.