Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium
Patent
1996-03-19
1998-03-17
Nelms, David C.
Dynamic information storage or retrieval
Specific detail of information handling portion of system
Radiation beam modification of or by storage medium
369 4414, 369119, G11B 700
Patent
active
057295212
ABSTRACT:
In an optical head unit, a reflection mirror for reflecting a light beam emitted from a laser element to an optical disk is rotated about a predetermined point which is on one of an extended portion of a first optical axis extending between the laser element and the mirror and an extended portion of a second optical axis extending between the mirror and the optical disk. A center of gravity of a movable section of the mirror is located closer to the optical disk than a reflection point of a reflection surface of the mirror, which intersects the first optical axis and the second optical axis and at the same time is located more remote from the laser element than the reflection point. Alternatively, the center of gravity of the movable section is located closer to the laser element than the reflection point and more remote from the optical disk than the reflection point.
REFERENCES:
patent: 4782474 (1988-11-01), Arai et al.
patent: 4866688 (1989-09-01), Ohtake et al.
patent: 5136559 (1992-08-01), Nakayamma
Chu Kim-Kwok
Kabushiki Kaisha Toshiba
Nelms David C.
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