Dynamic information storage or retrieval – Information location or remote operator actuated control – Selective addressing of storage medium
Patent
1986-07-02
1987-06-30
Cardillo, Raymond F.
Dynamic information storage or retrieval
Information location or remote operator actuated control
Selective addressing of storage medium
369 44, 369 45, G11B 7095, G11B 2108, G11B 2730
Patent
active
046776036
ABSTRACT:
In an optical recording and/or reproducing apparatus for recording and/or reproducing an information signal on and/or from an optical record disc by projecting a light beam spot onto the rotating disc by means of an objective lens, the objective lens is moved linearly in a disc radial direction over a small distance by means of a fine adjusting mechanism and the fine adjusting mechanism is moved in a stepwise manner in the disc radial direction over a large distance by means of a coarse driving mechanism including a pulse motor. The objective lens is moved together with the fine adjusting mechanism at a high speed and during intervals between successive stepwise movements, the objective lens is moved linearly by the fine adjusting mechanism. In this manner, the objective lens can be driven linearly over the large distance and a desired point of the disc can be quickly accessed.
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Van Nostrand's Scientific Encyclopedia, Sixth Edition, vol. 1, pp. 1442-1443, 1983.
Cardillo Raymond F.
Olympus Optical Co,. Ltd.
Young Wayne R.
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