US PATENT SUBCLASS 356 / 350
.~.~ For rotation rate (e.g., ring laser)

Current as of: June, 1999
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356 /   HD   OPTICS: MEASURING AND TESTING

345  DF  BY LIGHT INTERFERENCE (E.G., INTERFEROMETERS) {11}
349  DF  .~ With light beams of different frequency (e.g., heterodyning) {1}
350.~.~ For rotation rate (e.g., ring laser)

DEFINITION

Classification: 356/350

For rotation rate (e.g., ring laser):

(under subclass 349) Subject matter wherein the beams of differing frequency are generated as a result of the rotation of the interferometer.