发明名称 |
Optical data reproducing devices having improved trick play capability |
摘要 |
An optical data reproducing device including an illuminating system for respectively, simultaneously illuminating at least two separate tracks of an optical disk with at least two light beams; a photo-electric conversion device for respectively converting the at least two light beams reflected from the tracks into at least two electrical signals; and processing circuitry for processing the at least two electrical signals. The processing circuitry may include a switch for switching from one track to another to execute a trick jump play. This circuitry may also simultaneously read the track outputs. One or more diffraction gratings which may be perpendicularly oriented with respect to each other establish the beams projected on the tracks.
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申请公布号 |
US4720825(A) |
申请公布日期 |
1988.01.19 |
申请号 |
US19850696742 |
申请日期 |
1985.01.31 |
申请人 |
ASAHI KOGAKU KOGYO KABUSHIKI KAISHA |
发明人 |
KOKADO, HIROSHI |
分类号 |
G11B7/005;G11B7/085;G11B7/13;G11B7/135;G11B7/14;(IPC1-7):G11B7/00 |
主分类号 |
G11B7/005 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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