Optical scanning device

Details Optical scanning device Optical scanning device

2006-10-24

2006-10-24

Hindi, Nabil (Department: 2627)

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

C369S110020

Reexamination Certificate

active

07126900

ABSTRACT:
An optical scanning device for scanning a dual-layer optical record carrier. The device includes a spherical aberration compensation optical subsystem having a switchable liquid crystal cell (10) for altering a wavefront deviation generated in a folding mirror (32) including a non-periodic phase structure (NPS) located behind a polarization-selective reflective layer.

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patent: 6567365 (2003-05-01), Hendriks et al.
patent: 0865037 (1998-09-01), None
patent: 07-065407 (1995-03-01), None
patent: 2000-163791 (2000-06-01), None
patent: WO 01/24174 (2001-04-01), None

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