Holographic optical element and optical pick-up device using...

Details Holographic optical element and optical pick-up device using... Holographic optical element and optical pick-up device using...

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

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