US PATENT SUBCLASS 359 / 130
.~.~.~.~ Grating

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

109  DF  OPTICAL COMMUNICATION {13}
115  DF  .~ Multiplex {7}
124  DF  .~.~ Wavelength division/frequency division (includes scattering, e.g., Raman, Brillouin, etc.) {4}
127  DF  .~.~.~ By optical coupling {4}
130.~.~.~.~ Grating

DEFINITION

Classification: 359/130

Grating:

(under subclass 127) Subject matter wherein (1) a beam is coupled in or out of a waveguide to accomplish the desired multiplexing by narrow parallel slits in a plate or (2) narrow parallel reflecting surfaces made by ruling grooves on polished metal break up the light waves as they emerge.

(1) Note. This subject matter includes the combination of a grating and wavelength division or frequency division optical communication system (see Search Class Note for Class 385).

SEE OR SEARCH CLASS

385, Optical Waveguides,

37, for a grating coupling not included in an optical communication sytem.