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:
Aug. 09, 2016
Filed:
Apr. 23, 2014
Applicant:
Osram Gmbh, Munich, DE;
Inventors:
Ulrich Hartwig, Berlin, DE;
Martin Daniels, Berlin, DE;
Assignee:
OSRAM GmbH, Munich, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 26/00 (2006.01); F21V 14/08 (2006.01); G03B 21/14 (2006.01); G03B 21/20 (2006.01); G03B 33/08 (2006.01); H04N 9/31 (2006.01);
U.S. Cl.
CPC ...
G02B 26/008 (2013.01); F21V 14/08 (2013.01); G03B 21/142 (2013.01); G03B 21/204 (2013.01); G03B 33/08 (2013.01); H04N 9/3158 (2013.01);
Abstract
The invention provides an illumination device comprising a pump light source and a phosphor wheel. The phosphor wheel comprises at least two segmented phosphor layers. The front surfaces of the phosphor layers do not form a common plane, but instead a kind of relief in which the surfaces of the phosphor layers extend in different imaginary planes. When the phosphor wheel rotates through a beam waist of the pump. light, in this way the size of the pump light spot and therefore also the power density distribution of the pump light on the respective phosphor layer are adapted.