Thermally neutral dither motor design

Coherent light generators – Particular resonant cavity – Folded cavity

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356350, H01S 3083

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active

048478555

ABSTRACT:
A thermally neutralized ring laser gyro with a dither spring mounted into a central bore of a gyro block which permits dither of the block about an axis of the spring with thermal expansion effects being minimized. The dither spring has a central mounting member, a tubular outer ring member with outer surface segments secured to the block bore, radial members adjoined to and extending outward from the central member to the ring member, generally T-shaped junctions in the ring member and between adjacent ones of the outer surface segments with the radial members being adjoined to the inside of the junctions and an outer surface of each junction being spaced inwardly toward the axis from a major outer diameter defined by the segments and being in non-contact with the block bore. A method of obtaining improved thermal neutrality in a dither gyro includes the steps of leaving a void between each junction and the block bore, and then the further step of expanding the junctions into the voids when the gyro temperature changes.

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