Method and apparatus for planar alignment of a ring laser gyrosc

Details Method and apparatus for planar alignment of a ring laser gyrosc Method and apparatus for planar alignment of a ring laser gyrosc

1988-06-06

1989-07-25

McGraw, Vincent P.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

356152, 356364, 372 94, G01B 1126

Patent

active

048507083

ABSTRACT:
A method and apparatus for aligning the light path of a square ring laser gyroscope wherein the alignment method includes directing two input beams of light into the cavity of the gyroscope. Next, the input beams are intercepted prior to their incidence upon the input mirror with a pair of polarizers. Subsequently, the extinction ratios of the first and second output beams of light are measured at the exit mirror. The curved mirrors of the gyroscope are then translated in opposite directions and equal amplitude so as to change the extinction ratios of the output beams. Such translations are repeated until the measured extinction ratios are substantially equal.

REFERENCES:
patent: 4386853 (1983-06-01), Ljung

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