Honeywell G.m.b.h.

Harry A Gustafson

Wah L Lim

Mark W Weber

Timothy J Callaghan

Stephen P Callaghan

Francis H Zeman

A ring laser angular rate sensor is constructed from a solid glass block with lasing paths machined therein and mirrors joined to the block with a frit seal.

Low cost ring laser angular rate sensor

In the present application, an apparatus is provided for altering a ring laser angular rate sensor in such a way that the phase difference between the propagating waves therein includes lock-in error compensation. The apparatus of the present invention obtains a compensation output signal derived from the intensity of one or both of the propagating waves related to sensor lock-in error which can be utilized to alter the behavior of the ring laser so as to alter the behavior of the phase difference between the counter-propagating waves so that lock-in error contained therein is corrected.

Ring laser lock-in correction apparatus

A discriminant apparatus for laser angular rate sensors which provides an output signal related to a selected weighted vectorial sum of the coupling of energy between counterpropagating waves traveling about a closed-loop path. The discriminant apparatus is utilized in a closed-loop control system for minimizing the lock-in rate of the sensor and/or maintaining and selecting scale factor linearity.

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Minneapolis, MN, United States of America

Harry A Gustafson