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:
May. 24, 2005
Filed:
Apr. 01, 2002
Eric Krisl, Santa Rosa, CA (US);
Abbas Lamouri, Aurora, OH (US);
Leonid Pekker, Santa Rosa, CA (US);
Paul Morand, Rohnert Park, CA (US);
Juris Sulcs, Chagrin Falls, OH (US);
Norman L. Boling, Santa Rosa, CA (US);
Eric Krisl, Santa Rosa, CA (US);
Abbas Lamouri, Aurora, OH (US);
Leonid Pekker, Santa Rosa, CA (US);
Paul Morand, Rohnert Park, CA (US);
Juris Sulcs, Chagrin Falls, OH (US);
Norman L. Boling, Santa Rosa, CA (US);
Advanced Lighting Technologies, Inc., Solon, OH (US);
Abstract
An apparatus and method for achieving desired spectral emission characteristics in plasma lamps is disclosed. The apparatus and method use multi-layer thin film optical interference coatings to selectively reflect a portion of the light such that it can be absorbed in the plasma. The multi-layer thin film coating is applied to any surface of the lamp, which substantially surrounds the plasma. The number and thickness of the layers in the coating are selected to ensure that a significant portion of the selected light emitted from the plasma is reflected by the coating and absorbed by the plasma. The properties of the coating, reflectance, transmittance and absorption are determined as a function of plasma and lamp characteristics. These characteristics include the spectral emission characteristics of the plasma, the spectral absorption characteristics of the plasma, the physical dimensions of the plasma, the angular distribution of the light emitted from the plasma on the coating and the geometry of the coated surface.