Honeywell G.m.b.h.

Allan P Johnson

Ronald W Shovan

A pair of photodetectors are electrically connected in series. A common interconnection point of the two photodetectors is electrically connected to the inverting input of an opertional amplifier to provide a signal indicative of visible light falling on one of the photodetectors. The other of the photodetectors is masked to block visible but allow a response to non-visible radiation in the form of gamma, x-rays and the like.

Radiation hard visible light readout circuit

A dither motor system is described for a ring laser angular rate sensor which forms part of a spring-mass system. The dither motor system of the present invention provides selected control of the peak clockwise and/or peak counterclockwise dither angle of rotation of a spring-mass system.

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Minneapolis, MN, United States of America

Allan P Johnson