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:
Sep. 18, 1990
Filed:
Sep. 05, 1989
Applicant:
Inventors:
Assignee:
U.S. Philips Corporation, New York, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02F / ;
U.S. Cl.
CPC ...
307425 ; 307427 ;
Abstract
The invention relates to an arrangement for and a method of doubling the frequency of a light wave, for example to convert infrared light originating from a laser into green light. To that end a fundamental light wave is circularly polarized and passed through a non-linear optical medium, a second harmonic wave then being formed. The non-linear optical medium is formed from a centrosymmetrical material, whose molecules or molecular groups evidence chirality.