US Patent 7307804 Thermally stabile GRISMs

Patent 7307804 was granted and assigned to Kaiser Optical Systems on December, 2007 by the United States Patent and Trademark Office.

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Is a

Patent

Patent attributes

Current Assignee

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Kaiser Optical Systems

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

7307804

Date of Patent

December 11, 2007

Patent Application Number

11333046

Date Filed

January 17, 2006

Patent Primary Examiner

Leonidas Boutsikaris

Patent abstract

Thermally stable GRISMs comprise a substrate and cover plate composed of a first material keeps the spatial frequency of the grating stable with temperature, and a prism composed of a second material having lower thermal coefficient of refractive index than that of the first material. In the preferred embodiment, the first material is fused silica, and the second material is BK7 glass.