Recording and reproducing optical disk device with multi-disk ty

Details Recording and reproducing optical disk device with multi-disk ty Recording and reproducing optical disk device with multi-disk ty

1997-02-06

1999-05-04

Neyzari, Ali

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

369116, 369 4438, G11B 700

Patent

active

059011254

ABSTRACT:
In an optical disk device with various types of optical disks, the amounts of light are set for the various types of optical disks by emitting laser light from a semiconductor laser oscillator while sequentially increasing the light amount thereof for the optical disks in an order from the optical disk of the smallest set light amount. That is, first, whether or not an optical disk of CD, CD-ROM or DVD-ROM can be suitably used is determined based on the amount of reflection light from the optical disk obtained by causing the semiconductor laser oscillator to emit laser light in the smallest light amount setting state, and if it is not determined that the optical disk can be suitably used, the light amount is raised to a level higher than the lowest light amount set level by one level.

REFERENCES:
patent: 4918676 (1990-04-01), Miyasaka
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Vol. 015, No. 335 (P-1242), Aug. 26, 1991 & JP 03 122821 A, May 24, 1991.
Vol. 010, No. 338 (P-516), Nov. 15, 1986 & JP 61 139939 A, Jun. 27, 1986.
Vol. 014, No. 048 (P-0997), Jan. 29, 1990 & JP 01 276440 A, Nov. 7, 1989.
Vol. 096, No. 005, May 31, 1996 & JP08 007280 A, Jan. 12, 1996.

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