G - Physics – 11 – B
Patent
G - Physics
11
B
352/32.2
G11B 7/00 (2006.01) G11B 7/0037 (2006.01) G11B 7/004 (2006.01) G11B 7/08 (2006.01) G11B 7/12 (2006.01) G11B 27/36 (2006.01)
Patent
CA 1159150
VIDEO RECORDER-PLAYBACK MACHINE ABSTRACT OF THE DISCLOSURE A video recorder-playback machine is provided for recording and/or playing back video information from an information disc. The machine includes a "write" laser and a "read" laser respectively for generating record and playback optical beams which are focused upon the disc by an optical record-playback head. An optics carriage movably positions the head with respect to the disc in moving optical alignment with the "write" laser and carries the "read" laser in fixed optical alignment with the head. The machine includes apparatus for monitoring the record optical beam during operation in a record mode, and for substantially simultaneous opera- tion in a playback mode to monitor the playback optical beam during the recording process.
378861
Vitale George
Wilkinson Richard L.
Discovision Associates
Gowling Lafleur Henderson Llp
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