Optical data recording and reproducing apparatus

Details Optical data recording and reproducing apparatus Optical data recording and reproducing apparatus

1990-05-30

1992-09-29

Envall, Jr., Roy N.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369 59, 369121, 369112, G11B 700

Patent

active

051518937

ABSTRACT:
In an optical data recording and reproducing apparatus comprising an information signal generator, a sample/hold switching signal generator, a write/read switching signal generator, a laser beam source, a reference voltage generator, a comparator and a photo detector, a dummy signal is added to the information signal modulating the laser beam or generation of the laser beam is forcedly stopped after a data write servo mode so as to prevent generation of the laser beam of an excessively high level at the time of change-over from the data write servo mode to a data write hold mode or from the data write hold mode to a data read mode, or the level of the write/read switching signal is changed before the level of the sample/hold switching signal is changed at the time of change-over from the data write hold mode to the data read mode, or the duration of emission of the laser beam is extended slightly before the level of the sample/hold switching signal is changed.

REFERENCES:
patent: 4509156 (1985-04-01), Ohara et al.
patent: 4701609 (1987-10-01), Koishi et al.
patent: 4754460 (1988-06-01), Kimura et al.

Affiliated with

Also associated with

Rating

Optical data recording and reproducing apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Optical data recording and reproducing apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical data recording and reproducing apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1973956