Dynamic information storage or retrieval – Systems having plural physically distinct independent tracks... – Continuous consecutive storage or retrieval of interrupted...
Patent
1990-11-26
1991-11-05
Envall, Jr., Roy N.
Dynamic information storage or retrieval
Systems having plural physically distinct independent tracks...
Continuous consecutive storage or retrieval of interrupted...
369 4417, 359198, 346139R, G11B 374, G11B 700
Patent
active
050635557
ABSTRACT:
A rotary optical head apparatus comprises a first rotary member carrying an objective lens and a second rotary member carrying an image rotator. The two rotary members are supported for rotation by means of a single common support shaft so that the axes of rotation of the two rotary members coincide with each other with a high degree of accuracy. Consequently, the linearity of a scanning line of a beam spot which is scanned on an optical magnetic tape is ensured with a high degree of accuracy.
REFERENCES:
patent: 4669070 (1987-05-01), Bell
patent: 4807213 (1989-09-01), Chung et al.
patent: 4970707 (1990-11-01), Hara et al.
Kamatani Yoshiteru
Miyoshi Hiroshi
Narahara Tatsuya
Ohsato Kiyoshi
Ozue Tadashi
Envall Jr. Roy N.
Eslinger Lewis H.
Maioli Jay H.
Sony Corporation
Tran Thai
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