US PATENT SUBCLASS 359 / 578
.~ Electrically or mechanically variable (e.g., tunable, adjustable)

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

577  DF  LIGHT INTERFERENCE {2}
578.~ Electrically or mechanically variable (e.g., tunable, adjustable) {1}
579  DF  .~.~> By nonmovable driving element (e.g., piezoelectric, magnetostrictive)

DEFINITION

Classification: 359/578

Electrically or mechanically variable (e.g., tunable, adjustable):

(under subclass 577) Subject matter including means for producing a change in a geometric or optical characteristic of an interfering light wave or beam.