Dynamic information storage or retrieval – Binary pulse train information signal – Binary signal gain processing
Patent
1986-04-30
1988-03-15
Canney, Vincent P.
Dynamic information storage or retrieval
Binary pulse train information signal
Binary signal gain processing
H04N 576
Patent
active
047317736
ABSTRACT:
An optical information-bearing-signal recorder employs thermally-induced recording of ablative, material movement, material phase change, magneto-optic or similar technologies. Synchronous noise in the recording is reduced by employing a heat-inducing energy pulse, coherent light for example, shaped to have an initial recording-initiating intensity amplitude followed by a recording-sustaining amplitude. The duration of the recording-initiating amplitude portion is constant for all lengths of signals being recorded. When a rotating optical disk is employed as a record-bearing medium, the recording-initiating and recording-sustaining amplitudes are increased with increasing radius of the recording on the disk.
REFERENCES:
patent: 4419750 (1983-12-01), Howe
patent: 4488277 (1984-12-01), McFarlane et al.
patent: 4562567 (1985-12-01), Frankfort et al.
"Research Applies Magnetic Thin Films & the Magnetooptical Effect in Storage Devices"--N. Imamura, JFE, Mar. 1983.
Canney Vincent P.
International Business Machines - Corporation
Somermeyer Herbert F.
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