Non-destructive readout mechanism for volume holograms using two

Details Non-destructive readout mechanism for volume holograms using two Non-destructive readout mechanism for volume holograms using two

1993-08-13

1995-08-01

Willis, Davis L.

Optical: systems and elements

Holographic system or element

Using modulated or plural reference beams

359 11, 359 25, G03H 102

Patent

active

054384397

ABSTRACT:
Multiple volume holograms are recorded by changing the incidence angle of the reference beam at one wavelength. The stored holograms are reconstructed at another wavelength by using the reference beam oriented at the proper incidence angle. The proper holographic data are retrieved by pre-formatting or post-formatting the holographic data to be recorded or reconstructed. This usage of using different wavelengths for recording and reconstruction are independent of the scanning mechanisms for the reference beam. Utilization of holographic memories for storage and retrieval of data, and correlations can make use of this invention.

REFERENCES:
patent: 3767285 (1973-10-01), Mezrich
patent: 5121231 (1992-06-01), Jenkins et al.

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