Method for determining optimum irradiation conditions in optical

Details Method for determining optimum irradiation conditions in optical Method for determining optimum irradiation conditions in optical

1991-03-13

1994-04-19

Dzierzynski, Paul M.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369100, 369 54, G11B 700

Patent

active

053052978

ABSTRACT:
Before a signal is recorded on an optical disk, irradiations are made with plural light irradiation conditions of variable irradiation power or pulse width, optical conditions of irradiated portions are detected by detecting changes in the reflectivity or transmissivity or errors, and the optimum irradiation conditions are determined by comparing the detected results and the light irradiation conditions. In particular, by determining the optimum irradiation conditions in reference to the point where the change in reflectivity or transmissivity is greatest with respect to changes in the irradiation power, the optimum light irradiation conditions can be determined in a short time.

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patent: 4937799 (1990-06-01), Hashimoto
patent: 5043971 (1991-08-01), Van et al.
patent: 5050156 (1991-09-01), Barton
patent: 5101396 (1992-03-01), Takeuchi et al.
patent: 5123007 (1992-06-01), Miyauchi et al.
patent: 5126994 (1992-06-01), Ogawa et al.
Yamada et al., Japanese Journal of Applied Physics, vol. 26 (1987), Supplement 26-4, pp. 61-66.

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