Method and apparatus for interferometric rotation sensor phase m

Details Method and apparatus for interferometric rotation sensor phase m Method and apparatus for interferometric rotation sensor phase m

1990-02-15

1991-10-01

McGraw, Vincent P.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

G01C 1964

Patent

active

050528084

ABSTRACT:
A method and apparatus are disclosed for closed-loop phase modulation, intensity demodulation, control, and estimation of the non-reciprocal phase shift induced in a rotation sensing interferometer with a reciprocal phase modulator near one end of a closed light path. A bias modulation signal and a feedback modulation signal are generated, and the two signals are summed to form a summed signal which is applied to the phase modulator. The step transition frequency of the bias modulation signal is chosen so as not to fall on even harmonics of the proper frequency f.sub.p =1/2.tau..sub.o. The feedback modulation signal can consist of any periodic amplitude-modulated square wave with spectral frequency components at harmonics of the bias modulation step transition frequency. The spectral power of the feedback modulation signal must be distributed across frequencies other than even harmonics of the proper frequency f.sub.p.

Affiliated with

Also associated with

Rating

Method and apparatus for interferometric rotation sensor phase m does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for interferometric rotation sensor phase m, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for interferometric rotation sensor phase m will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1750647