US PATENT SUBCLASS 359 / 570
.~.~.~ Nonplanar grating substrate (e.g., concave)

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

558  DF  DIFFRACTION {3}
566  DF  .~ From grating {3}
569  DF  .~.~ Including particular grating characteristic {7}
570.~.~.~ Nonplanar grating substrate (e.g., concave)

DEFINITION

Classification: 359/570

Nonplanar grating substrate (e.g., concave):

(under subclass 569) Subject matter wherein the diffractive surface of the grating is of a shape other than planar, for example, a concave diffraction grating.

SEE OR SEARCH THIS CLASS, SUBCLASS:

534+, for a signal refletor having a curved refracting surface.