Laser power monitoring optics for a ring laser gyroscope
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United States of America Patent
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Oct 31, 1989
Grant Date -
N/A
app pub date -
Jan 19, 1988
filing date -
Jan 19, 1988
priority date (Note) -
Expired
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Abstract
Instead of using two power monitoring photodiodes and associated summing circuitries for adding the power of the laser beams circulating in the cavity of a ring laser gyro, the present invention eliminates one of the photodiodes and uses, in its stead, reflective means for directing both of the laser beams onto the remaining power monitoring photodiode, which automatically measures and sums the light intensities or power from the laser beams and provides as an output the thus added power directly to the necessary electronic circuitry to maintain constant the pathlength of the cavity.
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