Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium
Patent
1990-02-06
1994-03-01
Chin, Tommy P.
Dynamic information storage or retrieval
Specific detail of information handling portion of system
Radiation beam modification of or by storage medium
369 57, 369116, 369124, G11D 700
Patent
active
052914704
ABSTRACT:
In a method of recording an information signal by using a single light beam on a recording medium which is changeable between first and second states which are optically distinguishable from each other, record marks are formed each by the application of the light beam for a predetermined duration to cause the recording medium to melt and thereby result in the first state. The light beam is applied to an area between the record marks after having been modified to have a reduced energy so as to cause the area to melt and result in a state substantially identical to the second state, whereby the record marks can be read highly reliably. In another aspect, each record mark is formed in a symmetrical shape by the application of a train of light pulses providing an energy level which is gradually reduced from the beginning to the ending of the predetermined pulse train duration.
REFERENCES:
patent: 4646103 (1987-02-01), Sugiyama et al.
patent: 4894816 (1990-01-01), Sukeda et al.
patent: 4939717 (1990-07-01), Ohno et al.
patent: 5123007 (1992-06-01), Miyauchi et al.
"In-Se Based Phase Change Reversible Optical Recording Film"; Motoyasu Terao et al.; SPIE vol. 695 Optical Mass Data Storage II (1986): pp. 105-109.
JSAP Catalog Number: AP 881117-03, pp. 869-870 (Japanese Abstracts 5p-ZD-4--5p-ZD-6, published Oct. 4-7, 1988.
"Optical Data Storage"; 1989 Technical Digest Series vol. 1; published Jan. 17-19, 1989; pp. 6-13.
"Recent Advances in Erasable Phase-Change Optical Disks", Akahira et al., SPIE vol. 899 Optical Storage Technology and Applications (1988) pp. 188-195.
Nishiuchi Ken'ichi
Yamada Noboru
Chevalier Robert
Chin Tommy P.
Matsushita Electric - Industrial Co., Ltd.
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