US PATENT SUBCLASS 359 / 569
.~.~ Including particular grating characteristic

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.~.~ Including particular grating characteristic {7}
570  DF  .~.~.~> Nonplanar grating substrate (e.g., concave)
571  DF  .~.~.~> Echelette or blazed grating
572  DF  .~.~.~> Reflection grating (e.g., retrodirective)
573  DF  .~.~.~> Variable grating
574  DF  .~.~.~> With curved or geometrically shaped corrugation
575  DF  .~.~.~> With nonuniform corrugation width, spacing, or depth
576  DF  .~.~.~> Laminated or layered

DEFINITION

Classification: 359/569

Including particular grating characteristic:

(under subclass 566) Subject matter wherein the diffraction grating has one or more particular structural characteristics, such as thickness, shape, line spacing, aspect ratio, etc.