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:
May. 28, 1991
Filed:
Dec. 14, 1989
Applicant:
Inventor:
Toshiharu Okada, Ibaraki, JP;
Assignee:
Matsushita Electric Industrial Co., Ltd., Kadoma, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01S / ;
U.S. Cl.
CPC ...
372 34 ; 372 33 ; 372 21 ;
Abstract
The frequency conversion element for producing light of higher harmonic wave from the fundamental wave laser oscillator is provided with strain gauges 4, 4 or piezoelectric elements 4', 4' or thermo-couples 6, 6, output signals whereof are led to a signal processor and to a comparator, thereby to issue a control signal to decrease power of the input laser light, to prevent thermal breakdown of the frequency conversion element.