Flowing gas laser discharge tube structure
US4825445A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 19, 1988 |
| Grant date | Apr 25, 1989 |
| Priority date | — |
| Expiry date | May 19, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S3/036
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A co-axial laser tube structure of the kind used in a flowing gas laser has an inner axially extending tube for confining the flowing gas in a discharge region, a single pin cathode mounted adjacent the hot end of the inner tube, a single pin anode mounted intermediate the cool end and the hot end of the inner tube, a gas entrance orifice for permitting gas to flow from the exterior tube into the interior of the tube at the location of the anode electrode means, and an outer tube which is separate from and which extends co-axially with the inner tube. The outer tube is made of plastic and conducts flowing gas along the outside of the inner tube from the cool end to the gas entrance orifice. The co-axial laser tube structure includes tube installation and mounting means effective to permit installation and/or replacement of the inner and outer tubes without the need for subsequent adjustment or bore registration of the tubes. The inner surface of the inner tube is frosted to minimize parasitic modes which could be produced by diffracted light impinging on the inside surface of the inner tube at a grazing angle and also for decreasing the boundary layer of thickness to improve turbul…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.