Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
Patent
1994-01-10
1995-12-19
Young, W. R.
Dynamic information storage or retrieval
With servo positioning of transducer assembly over track...
Optical servo system
369 4425, 369 4429, 369 54, G11B 7085
Patent
active
054775132
ABSTRACT:
Information is recorded and reproduced by making a light beam traverse guide tracks to reach a target track. In moving the light beam to the target track, a current output circuit responds to a track jump command, and supplies a drive current to an objective lens driver. The driver current is transformed by the conversion circuit into a rapidly rising and gradually falling current, and supplied to the driver, The objective lens then moves. When the light beam reaches a track adjacent the target track, a track traverse detecting circuit supplies a track traverse detecting signal. In response to this signal, the current output circuit supplies a damping current by reversing the polarity of the drive current to the driver. The damping current is transformed by the conversion circuit into a rapidly rising and gradually falling current, and supplied to the driver.
REFERENCES:
patent: 4698795 (1987-10-01), Yoshio
patent: 5054013 (1991-10-01), Kawamura
patent: 5121370 (1992-06-01), Yanagi
patent: 5241522 (1993-08-01), Yanagi
patent: 5245597 (1993-09-01), Lee et al.
Patent Abstracts of Japan, vol. 14, No. 398, P 1097, Aug. 28, 1990, of JP 2-149930.
Patent Abstracts of Japan, vol. 15, No. 198, P 1204, May 22, 1991, of JP 3-49037.
Patent Abstracts of Japan, vol. 8, No. 202, P 300, Sep. 14, 1984, of JP 59-84379.
Patent Abstracts of Japan, vol. 15, No. 156, P 1192, Apr. 18, 1991, JP 3-25765.
Patent Abstracts of Japan, vol. 14, No. 321, P 1074, Jul. 10, 1990, of JP 2-103735.
Patent Abstracts of Japan, vol. 15, No. 153, P 1191, Apr. 17, 1991, of JP 3-23571.
Patent Abstracts of Japan, vol. 9, No. 64, P 343, Mar. 23, 1985, of JP 59-198570.
Patent Abstracts of Japan, vol. 9, No. 2 (P-325), Jan. 8, 1985, of JP 59-152568.
Patent Abstracts of Japan, vol. 13, No. 351, (P-912), Aug. 7, 1989, of JP 1-109577.
Patent Abstracts of Japan, vol. 16, No. 100, (P-1323), Mar. 11, 1992, of JP 3-276466.
Thomas, M., "Sample Access: A Substitute for Continuous Track Counting" (FIG. 2) "Proceedings of SPIE The International Society For Optical Engineers. Optical Mass Data Storage 11", vol. 695, Aug. 18, 1986, San Diego, Calif. pp. 160-164.
Onodera Akira
Yamazaki Koichi
Nippon Conlux Co., Ltd.
Young W. R.
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