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. 26, 2017
Filed:
Apr. 08, 2011
Applicant:
Roger Clarke, Royston, GB;
Inventor:
Roger Clarke, Royston, GB;
Assignee:
The Technology Partnership PLC, Melbourn, Royston, Herts, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B 5/18 (2006.01); G02B 27/01 (2006.01);
U.S. Cl.
CPC ...
G02B 27/0172 (2013.01); G02B 5/1866 (2013.01); G02B 27/0101 (2013.01); G02B 2027/0178 (2013.01); G02B 2027/0194 (2013.01);
Abstract
An optical device comprising an optical grating structure embedded between media of substantially the same optical refractive index, the structure having an optical coating at the interface between the two media, wherein the structure comprises grating facets inclined relative to the interface plane such that, in use, anomalous optical effects due to coating are substantially reduced.