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:
Oct. 15, 1991
Filed:
Nov. 08, 1989
Applicant:
Inventors:
Koji Yasui, Hyogo, JP;
Masaaki Tanaka, Hyogo, JP;
Shigenori Yagi, Hyogo, JP;
Masaki Kuzumoto, Hyogo, JP;
Assignee:
Mitsubishi Denki K.K., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01S / ;
U.S. Cl.
CPC ...
372 99 ; 372 95 ; 372103 ; 372108 ; 372-9 ;
Abstract
An output laser beam of an unstable laser resonator has a circular cross sectional pattern, so that a condensation thereof becomes easy, resulting in a high power beam. The circular pattern is obtained by making an expanding mirror of the resonator partially transmissible and compensating for a phase difference between laser beam portions passing through the expanding mirror and other portion of a window mirror.