OPTICAL PICKUP DEVICE CAPABLE OF STABLY DETECTING ERROR SIGNAL

PROBLEM TO BE SOLVED: To obtain an optical pickup device capable of stably detecting an error signal. SOLUTION: A signal detection unit is adopted, which includes a hologram member 10 with a plurality of pattern regions for diffracting and/or condensing light reflected by a record medium for enterin...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	SEONG PYONG-YONG, LEE YOUNG-JAE, SON RYUKI, YOO JANG-HOON, RYU HEIRETSU
Format:	Patent
Sprache:	eng
Schlagworte:	INFORMATION STORAGE INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER PHYSICS
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