Rotation rate measuring device

Details Rotation rate measuring device Rotation rate measuring device

1986-06-02

1987-11-03

McGraw, Vincent P.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

G01B 902

Patent

active

047040319

ABSTRACT:
A rotation rate measuring device is disclosed in which two beam portions travel around an optical-fiber coil (6) in opposite directions, and in which the Sagnac phase difference between the two beam portions after passage through the optical-fiber coil is evaluated. A beam splitter (2) divides a light beam into the two beam portions. Between this beam splitter and one end of the optical-fiber coil (6), an additional beam splitter (4) is inserted which is followed by a spatial filter (13) and a frequency shifter (5). Also provided are means which ensure that the two beam portions which travel around the optical-fiber coil in opposite directions pass through the spatial filter and the frequency shifter by the same path. A fully reciprocal arrangement is thus obtained.

REFERENCES:
patent: 4573795 (1986-03-01), Auch et al.
patent: 4638266 (1987-01-01), Auch et al.

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