Optics: measuring and testing – Range or remote distance finding – With photodetection
Patent
1982-04-05
1984-04-17
Corbin, John K.
Optics: measuring and testing
Range or remote distance finding
With photodetection
356318, 356246, G02B 700
Patent
active
044430728
ABSTRACT:
A purged window apparatus utilizing tangentially injected heated purge gases in the vicinity of electromagnetic radiation transmitting windows, and a tapered external mounting tube to accelerate these gases to provide a vortex flow on the window surface and a turbulent flow throughout the mounting tube. Use of this apparatus prevents backstreaming of gases under investigation which are flowing past the mouth of the mounting tube which would otherwise deposit on the windows. Lengthy spectroscopic investigations and analyses can thereby be performed without the necessity of interrupting the procedures in order to clean or replace contaminated windows.
REFERENCES:
patent: 3696230 (1972-10-01), Friedrich
patent: 4240691 (1980-12-01), Holmqvist et al.
Corbin John K.
Freund Samuel M.
Gaetjens Paul D.
The United States of America as represented by the United States
Vandenburgh Lynn
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