OPTICAL PICKUP APPARATUS, AND OPTIMAL LIGHT SPOT FOCUSING METHOD

PROBLEM TO BE SOLVED: To provide an optical pickup device and an optimal light spot focusing method. SOLUTION: The optical pickup device includes a diffraction member which has a first diffraction region having a wide width in a direction corresponding to the tangential direction of a recording medi...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	BA HEIIN, LEE JONG-KOOG, SEI HEIYO, YANG CHANG-JIN, GO SUNG-RO, RI YOSAI, SONG GI-BONG
Format:	Patent
Sprache:	eng
Schlagworte:	INFORMATION STORAGE INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER PHYSICS
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