Common aperture holographic storage system with reduced noise

Details Common aperture holographic storage system with reduced noise Common aperture holographic storage system with reduced noise

2008-10-07

2011-10-04

Lavarias, Arnel C (Department: 2872)

Optical: systems and elements

Holographic system or element

Using modulated or plural reference beams

C359S022000, C369S103000

Reexamination Certificate

active

08031383

ABSTRACT:
An apparatus for reading from or writing to holographic storage media, and more specifically a common aperture type apparatus for reading from or writing to holographic storage media with multiple reference beams having a reduced noise. In a common aperture type apparatus for reading from or writing to a holographic storage medium using shift-multiplexing, with a coaxial arrangement of two or more reference beams and an object beam or a reconstructed object beam, the reference beams being arranged around the object beam or the reconstructed object beam in a storage layer of the holographic storage medium. Each of the reference beams is located essentially halfway between two adjacent central peaks of shift-multiplexed holograms.

REFERENCES:
patent: 2006/0262701 (2006-11-01), Okada et al.
patent: WO 2006/003077 (2006-01-01), None
Search report dated May 16, 2008.

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