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US 3,982,151 AGranted
Optical information storage system
AssigneeCorning Glass Works
InventorsBruno F. Ludovici, Gerhard K. Megla
Life of this patent
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Abstract
An optical information storage system is disclosed which comprises a cathode ray tube having a photochromic fiber optic face plate on which data can be written by appropriate modulation and deflection of the electron beam. The readout function is accomplished by scanning appropriate portions of the phosphor by an electron beam of reduced intensity. Light which passes through the face plate is detected by a photocell.
Claims4
An optical information storage system comprising
- a cathode ray tube having a face plate consisting of a plurality of light-conducting optical fibers, each fiber having a core of photochromic glass of selected refractive index and a cladding on said core of light transmitting material of relatively lower refractive index, said fibers being arranged in side-by-side parallel contacting relation to each other in a hermetically sealed bundle,
- a layer of phosphor adjacent said face plate within said cathode ray tube,
- means for directing an electron beam on said layer of phosphor,
- means for changing the energy level of said electron beam,
- output means disposed on that side of said face plate opposite said phosphor layer in light receiving relationship with respect to said face plate for generating an electrical signal that is related to the intensity of the light emerging from the fibers of said plate, and
- means for applying a digital input signal to said means for changing the energy level of said electron beam.
3 more elements
Dependencies are inferred from the claim text.