Dynamic information storage or retrieval – Dynamic mechanism subsystem – Specific detail of storage medium support or motion production
Patent
1993-10-07
1995-08-29
Popek, Joseph A.
Dynamic information storage or retrieval
Dynamic mechanism subsystem
Specific detail of storage medium support or motion production
369264, 360 9702, G11B 1920
Patent
active
054467225
ABSTRACT:
An information recording apparatus including a device for driving an optical-disk's master disk, an electron lens barrel for having an electron beam irradiate a recording surface of a disk, a translational device for producing, between the disk and the electron lens barrel, a relative movement in a direction parallel to the recording surface and a container for enclosing the elements of the apparatus adapted to support a vacuum atmosphere. The driving device includes a turn table 4, a spindle 14a for supporting the turn table, a motor 14 for driving the spindle, and a magnetic shield for preventing magnetic fields of the motor from leaking outward. The motor is enclosed in the shield to prevent its magnetic fields from affecting the electron beam, which makes it possible to record information with high accuracy. The use of the motor as a drive source realizes easier and more responsive control of the turn table than that in the prior art.
REFERENCES:
patent: 3943275 (1976-03-01), Jebens et al.
patent: 4074313 (1978-02-01), Reisner et al.
patent: 4731778 (1988-03-01), van Hout et al.
patent: 4945515 (1990-07-01), Ooumi et al.
patent: 5335217 (1994-08-01), Kaneda et al.
Katsumura Masahiro
Kojima Yoshiaki
Wada Yasumitsu
Pioneer Electronic Corporation
Popek Joseph A.
Tran Andrew Q.
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