US PATENT SUBCLASS 359 / 679
.~.~ With fixed conjugates

Current as of: June, 1999
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359 /   HD   OPTICS: SYSTEMS (INCLUDING COMMUNICATION) AND ELEMENTS

642  DF  LENS {32}
676  DF  .~ With variable magnification (e.g., zoom type ) {6}
679.~.~ With fixed conjugates

DEFINITION

Classification: 359/679

With fixed conjugates:

(under subclass 676) Subject matter wherein an object plane and its corresponding (i.e., conjugate) image plane are fixed and are located at finite distances from the lens.