US PATENT SUBCLASS 358 / 495
.~.~.~.~ Spiral or helix aperture with linear aperture

Current as of: June, 1999
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358 /   HD   FACSIMILE AND STATIC PRESENTATION PROCESSING

400  DF  FACSIMILE {17}
471  DF  .~ Picture signal generator {3}
474  DF  .~.~ Scanning {15}
494  DF  .~.~.~ Linear scanning pattern {3}
495.~.~.~.~ Spiral or helix aperture with linear aperture

DEFINITION

Classification: 358/495

Spiral or helix aperture with linear aperture:

(under subclass 494) Subject matter wherein there are two surfaces between a source of light and a light responsive element, one surface having a linear aperture and the other surface having a helical aperture where the two apertures move relative to each other.