US PATENT SUBCLASS 369 / 100
.~ Radiation beam modification of or by storage medium

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.~ Radiation beam modification of or by storage medium {20}
101  DF  .~.~> Invisible radiation (e.g., electron beam or X-ray)
102  DF  .~.~> Multiplex
103  DF  .~.~> Holographic
104  DF  .~.~> Ribbon light modulator
105  DF  .~.~> Penumbra or push-pull optical system
106  DF  .~.~> Optical feedback
107  DF  .~.~> Ground noise suppression, signal envelope, or plural optical modulation
108  DF  .~.~> Color
109  DF  .~.~> With diffraction (e.g., pits, grating)
110  DF  .~.~> By polarization
111  DF  .~.~> Spiral or helical track
112  DF  .~.~> With particular imaging element
113  DF  .~.~> With medium contacting drum or gate in optical system (e.g., sound head) {2}
116  DF  .~.~> Light intensity adjustment or maintenance
117  DF  .~.~> Having movable shutter or light gate
118  DF  .~.~> With detail, configuration, or adjunct of element having slit or aperture in radiation path {1}
120  DF  .~.~> Having particular radiation sensor
121  DF  .~.~> With particular light source (e.g., laser, CRT with phosphor) {2}
124  DF  .~.~> With details of electrical signal procesing
125  DF  .~.~> Having photographic storage medium (e.g., variable density or area)

DEFINITION

Classification: 369/100

Radiation beam modification of or by storage medium:

(under subclass 99) Subject matter wherein the information signal is stored on or retrieved from the storage medium by a beam of radiant energy which is modulated by the information signal either (a) to store the information on a radiant energy sensitive storage medium, or (b) by a radiant energy controlling storage medium for subsequent retrieval by sensing of the radiant energy.