Holographic disc recording system

Details Holographic disc recording system Holographic disc recording system

2007-02-20

2007-02-20

Korzuch, William (Department: 2627)

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

C369S112150, C369S112050, C369S118000

Reexamination Certificate

active

10359217

ABSTRACT:
A holographic disc recording system for recording, in the form of holograms, information stored on a source disc onto a target disc includes a conical beam shaper which transforms a reference beam into a conical beam having a substantially cylindrically symmetrical shape and including light rays which travel along lines which intersect a beam axis of the conical beam at substantially the same angle with respect to the beam axis. The conical beam is incident on the target disc while the beam axis of the conical beam substantially coincides with a central axis of the target disc, so that substantially all of the light rays of the conical beam are incident on the target disc at substantially the same angle.

REFERENCES:
patent: 3843260 (1974-10-01), Edmonds
patent: 4790612 (1988-12-01), Dickson
patent: 5949557 (1999-09-01), Powell

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