Optics: measuring and testing – By dispersed light spectroscopy – Utilizing a spectrometer
Patent
1982-07-06
1985-10-22
McGraw, Vincent P.
Optics: measuring and testing
By dispersed light spectroscopy
Utilizing a spectrometer
G01C 1964
Patent
active
045485011
ABSTRACT:
A four-frequency laser gyroscope system having improved accuracy is constructed using a single solid block of low thermal coefficient of expansion material. A four-segment nonplanar propagation path provides a first frequency splitting. A second splitting is provided by a Faraday rotator having a thin slab of rare earth-doped glass positioned within an aperture in a permanent magnet. A narrow angle of incidence is provided for the beams of incident upon the output mirror to prevent cross coupling between beams within the output optics structure. Blocking the gaseous flow path reduces output frequency drift caused by contaminating particles.
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Dorschner Terry A.
Smith Irl W.
McGraw Vincent P.
Pannone Joseph D.
Raytheon Company
Sharkansky Richard M.
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