US PATENT SUBCLASS 359 / 869
.~.~ Concave

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

838  DF  MIRROR {14}
868  DF  .~ With mirror surface of varied radius {1}
869.~.~ Concave

DEFINITION

Classification: 359/869

Concave:

(under subclass 868) Subject matter wherein a nonspherical continuously curved reflecting surface includes a smooth surface indented away from the direction of an incident light beam.

SEE OR SEARCH THIS CLASS, SUBCLASS:

852, for composite or echelon mirrors providing a line focus.

867, for a concave cylindrical mirror providing a line focus.