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:
Nov. 13, 1984
Filed:
Jun. 29, 1981
Lowell E Thomas, Tewksbury, MA (US);
Dynamics Research Corporation, Wilmington, MA (US);
Abstract
An optical grating is provided by the deposition of thin layers of alternating materials on a substrate, the cross-section of which provides a three-dimensional grating. In one embodiment an alternating layered structure is provided by vacuum deposition of optically differing materials on a planar substrate, thereby to provide alternating layers defining planes parallel one to the other. The resulting structure is sectioned and polished such that the exposed adjacent ends of the alternating layers provide either a reflective or transmission grating of exceptional precision and accuracy due to the linear sharply-defined interfaces between adjacent exposed layers. In one embodiment, the finished structure is utilized as an optical coupler for coupling light into and out of an optical integrated circuit. In another embodiment, the grating is incorporated into a substrate over which an optical waveguide or an electro-optical element may be formed.