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:
Mar. 27, 2001
Filed:
Jun. 28, 1999
Hitoshi Hongu, Hyogo, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
The gas laser oscillator having metal housings disposed near internal mirrors of the resonator for covering, for example, the external of connecting tubes partially or totally, means for detecting the micro discharge current flowing inside of the connecting tubes near the internal mirrors of the resonator, and a control circuit for controlling energy to be supplied into discharge tubes by comparing output signals output from the means for detecting the micro discharge current with reference signals. The gas laser oscillator prevents the micro discharge current from flowing in laser gas inside of the connecting tubes, thereby preventing degradation of a total reflection mirror and a partial reflection mirror defining the internal mirrors of the resonator.