Optical disk recording and readout system having read, write and coarse light beams
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United States of America Patent
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Jun 21, 1988
Grant Date -
N/A
app pub date -
Jul 6, 1984
filing date -
Jul 6, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An optical system for writing and reading data from a rotating optical storage disk, comprising a first, second and third coherent light source, providing coarse seek, reading, and writing functions, the three writing sources sharing a plurality of optical elements in common, all cooperating to provide for the coarse seek, fine seek, focus and tracking functions of the device. The read and the write optical beams are optically coupled together to ensure proper spacing of a newly written track with regard to the previously written track.
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