Optical reading device and optical recording device

Details Optical reading device and optical recording device Optical reading device and optical recording device

1992-09-28

1994-02-22

Pascal, Robert J.

Dynamic information storage or retrieval

Information location or remote operator actuated control

Selective addressing of storage medium

369 4428, 369 58, G11B 1722

Patent

active

052894401

ABSTRACT:
An optical reading device for reading information recorded on a track of an optical record carrier, and an optical recording device for recording information on a track of an optical record carrier. Both devices use a radiation source to scan the record carrier (the reading device to read and the recording device to record) and a buffer memory which changes the rate in which the information which is read or to be written enters and leaves the buffer memory. In the reading device, the information read enters the buffer memory at a faster rate than it leave the buffer memory. In the recording device the opposite occurs. As a result, when the buffer memory of the reading device reaches a certain maximum filling level, information read in thereto is interrupted and so is use of the radiation source, such interrupts ending when the filling level of the buffer memory reaches a minimum level. Likewise, when the buffer memory of the recording device reaches a certain filling level, information read out therefrom is interrupted and so is use of the radiation source, such interrupts ending when the filling level of the buffer memory reaches a minimum level.

REFERENCES:
patent: 4413289 (1983-11-01), Weaver et al.
patent: 4853921 (1989-08-01), Takeda

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