Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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NIHON TSUUSHIN GIJUTSU KK
NIPPON TSUSHIN GIJUTSU KK
Original Assignee
NIHON TSUUSHIN GIJUTSU KK
NIPPON TSUSHIN GIJUTSU KK
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Filing date
Publication date
Application filed by NIHON TSUUSHIN GIJUTSU KK, NIPPON TSUSHIN GIJUTSU KKfiledCriticalNIHON TSUUSHIN GIJUTSU KK
Priority to JP20028882ApriorityCriticalpatent/JPS5993292A/ja
Publication of JPS5993292ApublicationCriticalpatent/JPS5993292A/ja
Publication of JPH0146279B2publicationCriticalpatent/JPH0146279B2/ja
A scanning device producing a first and a second scanning spot which move in different directions and an apparatus containing that device which uses the first spot for reading and/or recording and the second spot to monitor such reading and/or recording
Displacement detection method, displacement detection device and recording apparatus for performing recording on master of information recording medium