US PATENT SUBCLASS 359 / 729
.~.~.~.~ With concave and convex reflectors in series

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}
727  DF  .~.~ Including concave or convex reflecting surface {2}
728  DF  .~.~.~ With aspheric surface (e.g., Schmidt lens, etc.) {1}
729.~.~.~.~ With concave and convex reflectors in series

DEFINITION

Classification: 359/729

With concave and convex reflectors in series:

(under subclass 728) Subject matter where the lens system includes both concave and convex reflecting elements consecutively receiving light.