US PATENT SUBCLASS 359 / 234
.~ With rotating or pivoting element (e.g., scanning discs)

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

227  DF  LIGHT CONTROL BY OPAQUE ELEMENT OR MEDIUM MOVABLE IN OR THROUGH LIGHT PATH {6}
234.~ With rotating or pivoting element (e.g., scanning discs) {2}
235  DF  .~.~> Continuously rotating apertured element
236  DF  .~.~> Element rotates about axis perpendicular to light path

DEFINITION

Classification: 359/234

With rotating or pivoting element (e.g., scanning discs):

(under subclass 227) Subject matter comprising means wherein the light control results from revolving, completely or partially, an opaque element or an element containing opaque and transparent portions.

(1) Note. Included here are generic optical shutters or diaphragms, per se, which have rotating vanes or blades.

SEE OR SEARCH THIS CLASS, SUBCLASS:

229, for similar subject matter used in reducing glare.

233, for two relative moving apertured elements which may rotate.

SEE OR SEARCH CLASS

250, Radiant Energy,

201.1+, for scanning elements of this type used in photo-cell controlled optical systems and subclass 232 for the combination of a light chopper and photocell.