US PATENT SUBCLASS 359 / 211
.~.~.~ Having moving prism

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

196  DF  DEFLECTION USING A MOVING ELEMENT OR MEDIUM (OFFSETTING OR CHANGING AT LEAST A PORTION OF THE BEAM) {3}
197  DF  .~ Using a periodically moving element (periodic change of optically reflecting, refracting or diffracting element) {6}
209  DF  .~.~ Including transmissive type moving element {2}
211.~.~.~ Having moving prism

DEFINITION

Classification: 359/211

Having moving prism:

(under subclass 209) Subject matter including one or more transparent bodies bounded in part by two plane surfaces which are angularly related (i.e., not parallel), at least one of these surfaces being internally reflecting or refracting to impinging incident light.

(1) Note. A prism may be employed for refracting or reflecting light. Prism reflections are considered to be internal reflections; that is, the light is inside the prism body both before and immediately after the reflection.

SEE OR SEARCH THIS CLASS, SUBCLASS:

592+, for refracting elements employed in natural light directing systems.

606, for prismoidal antiglare mirrors.

618+, for plural path optical systems which divide or combine the light paths.

831+, for a prism, per se. SEE OR SEARCH CLASS

356, Optics: Measuring and Testing,

51+, for optical test devices having prisms used in the infrared or ultraviolet range alone or in combination with visible light, subclasses 300+ for prism type spectroscopic instruments, and subclasses 331+ for prism type monochromators.