Optics: measuring and testing – By polarized light examination – With birefringent element
Patent
1991-04-15
1994-11-01
Gregory, Bernarr E.
Optics: measuring and testing
By polarized light examination
With birefringent element
356130, G01N 2141
Patent
active
H00013706
ABSTRACT:
A refractive index variability measuring system using a configuration of ical interferometers, mirrors, windows and receivers is desirable. The system provides an improved and a distinctive method for vibration and thermal expansion cancellation. Additionally, an improved matching of optical paths by using this system allows for growth of several measurement paths without additional mismatch of measurement and vibration canceling paths.
REFERENCES:
patent: 4640615 (1987-02-01), Sasaki
Stachnik William J.
Wolch John D.
Gregory Bernarr E.
Lall Prithvi C.
McGowan Michael J.
The United States of America as represented by the Secretary of
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