US PATENT SUBCLASS 356 / 358
.~.~ Of displacement or distance


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

345  DF  BY LIGHT INTERFERENCE (E.G., INTERFEROMETERS) {11}
357  DF  .~ For dimensional measurement (e.g., thickness) {1}
358.~.~ Of displacement or distance


DEFINITION

Classification: 356/358

Of displacement of distance:

(under subclass 357) Subject matter including means for

measuring small changes in position of an article or small length of space between two points.

SEE OR SEARCH THIS CLASS, SUBCLASS:

4.09, and 4.1, for measurement of displacement or distance over large distances involving light interference.

373, for optical measurement of displacement or distance, per se.