Optics: measuring and testing – By dispersed light spectroscopy – Utilizing a spectrometer
Patent
1993-03-08
1994-02-08
Turner, Samuel A.
Optics: measuring and testing
By dispersed light spectroscopy
Utilizing a spectrometer
G01C 1972
Patent
active
052852571
ABSTRACT:
An optic rotation sensing apparatus includes a light source emitting light. The light emitted from the light source is transmitted to a sensing loop which provides a phase difference between opposite-direction light waves in response to a rotation. Return light outputted from the sensing loop is transmitted to a photodetector. A device modulates a phase of light propagating in the sensing loop. Another device depolarizes light propagating in the sensing loop. The invention further controls and processes an output signal representing the output of the photodetector at a phase at which a level of an AM noise component of the output signal is minimized.
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Honjoya Yoshihiko
Negishi Hidehiko
Takei Yuko
Takeuchi Yoshinori
Matsushita Electric - Industrial Co., Ltd.
Turner Samuel A.
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