Scatter noise reduction in holographic storage systems by signal

Details Scatter noise reduction in holographic storage systems by signal Scatter noise reduction in holographic storage systems by signal

1998-02-06

2000-09-12

Spyrou, Cassandra

Optical: systems and elements

Holographic system or element

For producing or reconstructing images from multiple holograms

359 7, 359 22, G03H 126, G03H 128, G03H 102

Patent

active

061185604

ABSTRACT:
A method and an apparatus for increasing detection signal-to-noise ratio, by reducing the effect of optical scatterers from a holographic storage medium, are disclosed. The method comprises the step of sensing the phase of scattered radiation and the subsequent step of writing the hologram data into the holographic storage medium. The image containing the hologram data is written with phase characteristics such that, during a subsequent hologram readout, the electric fields from the image and scatterers are 90 degrees out of phase. This optimum phase relationship greatly reduces the effect of scatter noise, thereby increasing signal-to-noise ratio and reducing bit-error-rate.

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