Coherent light generators – Particular active media – Gas
Patent
1999-05-12
2000-03-07
Scott, Jr., Leon
Coherent light generators
Particular active media
Gas
H01S 322
Patent
active
060349840
ABSTRACT:
A tangential fan and cutoff assembly for recirculating a lasing gas mixture has blade members, which vary in circumferential position stepwise from end to end, and/or a tapered anode assembly. The number of blade members can be constant or variable between ends. The circumferential position of blade members can shift monotonically or reversibly between ends. Blade members are stiffened by optimally selecting the number and placement of hub members to control the natural vibration frequency of the fan. Methods of forming tangential fans include casting, and machining from a solid block. Monolithic structures can be joined, typically by electron-beam welding. Casting, welding, and machining processes introduce no additional contaminants. Tangential fans produced have mechanical rigidity, accurate tolerances, and low contaminant concentrations. Blade members can be formed into air foil shapes.
REFERENCES:
Hi-Tech Blowers,Inc; Catalog;525 Northern Blvd. Great Neck NY 11021.
Hofmann Thomas
Howey James K.
Shannon Robert A.
Ujazdowski Richard C.
Watson Tom A.
Cymer Inc.
Jr. Leon Scott
Ross John R.
Tiffany William B.
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