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, 2002
Filed:
Apr. 02, 1999
Michael Von Borstel, Pleidelsheim, DE;
Trumpf Lasertechnik GmbH, Ditzingen, DE;
Abstract
An HF-excited gas laser has a laser tube of ceramic material containing a laser gas, and the tube includes a chemical component which will preclude passage therethrough of secondary radiation of a wavelength within a proscribed range which would interact with the material of the laser tube to create defects therein. The chemical component to prevent damage to the laser tube may be provided as a layer on its inside surface which is essentially impermeable to and/or reflects the secondary radiation back into the lasing gas. Alternatively, the material of the laser tube may incorporate the chemical component, preferably over the portion of the wall adjacent its inner surface.