US PATENT SUBCLASS 359 / 588
.~.~.~ Filter having four or more layers

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

577  DF  LIGHT INTERFERENCE {2}
580  DF  .~ Produced by coating or lamina {7}
586  DF  .~.~ Layers having specified index of refraction {2}
588.~.~.~ Filter having four or more layers

DEFINITION

Classification: 359/588

Filter having four or more layers:

(under subclass 586) Subject matter including light interference filter with four or more layers.