US PATENT SUBCLASS 369 / 105
.~.~ Penumbra or push-pull optical system

Current as of: June, 1999
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369 /   HD   DYNAMIC INFORMATION STORAGE OR RETRIEVAL

99  DF  SPECIFIC DETAIL OF INFORMATION HANDLING PORTION OF SYSTEM {4}
100  DF  .~ Radiation beam modification of or by storage medium {20}
105.~.~ Penumbra or push-pull optical system

DEFINITION

Classification: 369/105

Penumbra or push-pull optical system:

(under subclass 100) Subject matter wherein the optical path has either (a) variably superimposed shadows, or (b) complementarily varying beams.