Optical lens, condenser lens, optical pickup, and optical...

Details Optical lens, condenser lens, optical pickup, and optical... Optical lens, condenser lens, optical pickup, and optical...

2003-11-17

2008-09-16

Young, Wayne (Department: 2627)

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

C369S112240, C369S112010

Reexamination Certificate

active

07426171

ABSTRACT:
Disclosed herein is an optical lens suitable for a near-field optical recording/reproducing system. A condenser lens, optical pickup, and optical recording/reproducing apparatus each using this optical lens are also disclosed. This optical lens is formed from an SiC single crystal having a cubic structure. The condenser lens includes a first optical lens and a second optical lens arranged in this order from an objective surface, and at least the first optical lens is formed from an SiC single crystal having a cubic structure. The optical pickup includes a light source and a condenser lens for converging light emitted from the light source to form a beam spot. This condenser lens has the same configuration as the above. The optical recording/reproducing apparatus includes this optical pickup.

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patent: 2002/0057645 (2002-05-01), Kishima
patent: 11273126 (1999-10-01), None

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