US PATENT SUBCLASS 352 / 113
.~ Refractor

Current as of: June, 1999
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352 /   HD   OPTICS: MOTION PICTURES

105  DF  OPTICAL RECTIFIER TYPE {6}
113.~ Refractor {3}
114  DF  .~.~> Plural projection lenses {1}
116  DF  .~.~> Plural refractor elements with rotary carrier {2}
119  DF  .~.~> Rotating plano parallel prism {1}

DEFINITION

Classification: 352/113

(under subclass 105) Subject matter in which the optical means includes a refracting means which is cyclically moved to compensate for the relative film and image movement.