Pick-up apparatus for digital storage medium

Details Pick-up apparatus for digital storage medium Pick-up apparatus for digital storage medium

2007-01-02

2007-01-02

Amari, Alessandro (Department: 2872)

Optical: systems and elements

Holographic system or element

For reconstructing image

C369S103000

Reexamination Certificate

active

10847313

ABSTRACT:
In order to pick up a digital storage medium including a holographic storage medium and a reflective storage medium, a first and a second beam each of which has a different wavelength are used and a reflected beam and a reconstructed signal beam are propagated through a propagation path, wherein the first beam is reflected by the digital storage medium to generate the reflected beam and the second beam is diffracted by a holographic interference pattern in the holographic storage medium to generate the reconstructed signal beam. A polarizing beam splitter is used to split the reflected beam from the propagation path while a laser line mirror is used to separate the reconstructed signal beam from the propagation path.

REFERENCES:
patent: 6738322 (2004-05-01), Amble et al.
patent: 03/032300 (2003-04-01), None

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