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. 09, 1986
Filed:
Sep. 06, 1985
Applicant:
Inventors:
Kenneth H Braun, North Billerica, MA (US);
Michael S Perlmutter, Sherborn, MA (US);
Assignee:
Raytheon Company, Lexington, MA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G01C / ; H01S / ;
U.S. Cl.
CPC ...
356350 ; 350600 ; 372 19 ; 372 94 ; 372 99 ;
Abstract
In an optical system such as a ring laser gyroscope cavity, oscillations occur in many transverse modes. The desired modes are allowed to exist by suppressing undesired modes utilizing a light stop apparatus. One light stop is made by treating a dielectric mirror with an electron beam causing a phase change to occur to the undesired reflected waves. An alternative light stop is made by depositing an absorptive material on a dielectric mirror for absorbing some of the energy of the undesired modes. Both light stop embodiments are adjustable with respect to a laser wave in a resonant cavity.