Dynamic information storage or retrieval – Condition indicating – monitoring – or testing – Including radiation storage or retrieval
Patent
1991-07-03
1993-06-08
Young, W. R.
Dynamic information storage or retrieval
Condition indicating, monitoring, or testing
Including radiation storage or retrieval
369 59, 369116, G11B 700, G11B 2010, H04N 576
Patent
active
052185915
ABSTRACT:
In an optical disk apparatus for recording information in pits formed on an optical disk by projecting a light beam onto the optical disk and heating an area of the optical disk corresponding to the pulse pattern of the information, the pulse pattern of the information to be recorded is discriminated, and on the basis of the discriminated pulse pattern, the timing to start on and end the emission of the light beam from the light source to the optical disk is modified, or the number of emissions and the duration of each emission is controlled so that the pattern of the pits are corrected to the shapes that ensure accurate regeneration of the information.
REFERENCES:
patent: 4866692 (1989-09-01), Saito et al.
patent: 4894816 (1990-01-01), Sukeda et al.
patent: 4998237 (1991-03-01), Osakabe et al.
patent: 5003527 (1991-03-01), Matsumoto et al.
"High-Density Magneto-Optic Disk Using Highly Controlled Pit-Edge Recording" Proc. Int. Symp. on Optical Memory, 1987, Japanese Journal of Applied Physics, vol. 26 (1987), Supplement 26-4, pp. 243-248.
Ito Osamu
Shimamoto Masayoshi
Tanaka Kunimaro
Watanabe Isao
Mitsubishi Denki & Kabushiki Kaisha
Tran Thang V.
Young W. R.
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