Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium
Reexamination Certificate
2006-01-31
2006-01-31
Huber, Paul W. (Department: 2653)
Dynamic information storage or retrieval
Specific detail of information handling portion of system
Radiation beam modification of or by storage medium
C369S112150
Reexamination Certificate
active
06992967
ABSTRACT:
An optical pick-up device uses a holographic optical element that includes a holographic optical element, formed by combining a birefringence medium and an isotropy medium, for adjusting an optical route of a transmitted beam according to a polarizing direction and wavelength of an incident beam. The optical pick-up device has an objective lens for focusing the beam pass through the holographic optical element on an optical disk according to the wavelength of such beam.
REFERENCES:
patent: 6618344 (2003-09-01), Funato
patent: 6643245 (2003-11-01), Yamamoto et al.
patent: 1115039 (1996-01-01), None
Hong, Degerman, Kang & Schmadeka
Huber Paul W.
LG Electronics Inc.
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