US PATENT SUBCLASS 359 / 732
.~.~ For producing a double pass

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

642  DF  LENS {32}
726  DF  .~ With reflecting element {3}
732.~.~ For producing a double pass

DEFINITION

Classification: 359/732

For producing a double pass:

(under subclass 726) Subject matter where a reflective surface mirror reflects light which has passed through a lens back through the same lens.