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. 01, 1987
Filed:
Jun. 06, 1986
Koito Seisakusho Co., Ltd., Tokyo, JP;
Abstract
A helium-cadmium ion laser is disclosed which has a tubular housing hermetically closed at both ends by Brewster windows and having a hollow cathode mounted therein. Disposed outside the hollow cathode and open to its interior are a row of primary anodes and a row of metal chambers containing a metal material to be vaporized. A pair of secondary anodes are further disposed adjacent the opposite ends of the hollow cathode for protecting the Brewster windows from contamination by the metal vapor by sending it back into the hollow cathode. In order to prevent the metal vapor from depositing on the ends of the hollow cathode on being thus sent back, a pair of tubular insulators are coaxially mounted next to the opposite ends of the hollow cathode for the passage of the metal vapor therethrough. Each tubular insulator has a bore including a smaller diameter portion away from the hollow cathode, and a larger diameter portion closer to the hollow cathode. Further, for impeding the flow of the metal vapor from the hollow cathode toward the Brewster windows, the laser housing has a pair of constrictions adjacent the Brewster windows.