Spatio-angular multiplexing geometry for volume holographic stor

Details Spatio-angular multiplexing geometry for volume holographic stor Spatio-angular multiplexing geometry for volume holographic stor

1996-07-24

1998-12-01

Henry, Jon

Optical: systems and elements

Holographic system or element

Having particular recording medium

359 22, 369103, G02B 102, G02B 126, G11B 700

Patent

active

058447008

ABSTRACT:
Partially overlapping holograms are stored in a cylindrical volume holographic storage medium capable of rotation about and translation along its longitudinal axis. The reference and signal beams are mutually perpendicular, and each is perpendicular to the longitudinal axis. An index-matched housing encloses the medium laterally. An optional helically-varying optical axis (c-axis) orientation allows recording at constant angular intervals over a full revolution. Signals from stored pages are used to dynamically adjust the positioning of the medium relative to the light beams as the medium continuously spins at high velocity, and to control the access of the signal beam to the readout camera.

REFERENCES:
patent: 3737878 (1973-06-01), Gamblin et al.
patent: 4017144 (1977-04-01), Staebler
patent: 4295162 (1981-10-01), Carlsen
patent: 4449785 (1984-05-01), Huignard et al.
patent: 5111313 (1992-05-01), Shires
patent: 5450218 (1995-09-01), Heanue et al.

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