OBJECTIVE LENS FOR OPTICAL PICKUP DEVICE, OPTICAL PICKUP DEVICE, AND OPTICAL INFORMATION RECORDING AND REPRODUCING APPARATUS

PROBLEM TO BE SOLVED: To provide an objective lens for an optical pickup device, the objective lens being able to make three types of optical disks compatible by a common object lens, able to restrict an increase in the diameter of a spot and, moreover, being excellent in easy manufacturability, and...

Ausführliche Beschreibung

Bibliographische Detailangaben

1. Verfasser:	TOTSUKA HIDEKAZU
Format:	Patent
Sprache:	eng
Schlagworte:	INFORMATION STORAGE INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER PHYSICS
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