US PATENT SUBCLASS 356 / 395
.~ With relatively movable optical grids

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

388  DF  BY CONFIGURATION COMPARISON {8}
395.~ With relatively movable optical grids

DEFINITION

Classification: 356/395

With relatively movable optical grids:

(under subclass 388) Subject matter comprising plural optical grids which are relatively movable.

(1) Note. One or more of the grids may be an image of the actual grid.

SEE OR SEARCH THIS CLASS, SUBCLASS:

151, for similar subject matter utilized in measuring angles.

374, for mensuration of article displacement by moire' fringe generation.