Phase conjugate reconstruction of a hologram

Details Phase conjugate reconstruction of a hologram Phase conjugate reconstruction of a hologram

2006-05-25

2009-06-16

Amari, Alessandro (Department: 2872)

Optical: systems and elements

Holographic system or element

Using modulated or plural reference beams

C359S022000, C359S032000

Reexamination Certificate

active

07548358

ABSTRACT:
Methods and systems are provided for obtaining a phase conjugate reconstruction beam for use in retrieving holographic information from a holographic storage medium. These methods and systems include generating a coherent light beam that is a reproduction of the reference beam used in storing the holographic information in the storage medium. This coherent light beam is then directed through the holographic storage medium at the same angle and location of the reference beam during recording of the hologram. The directed coherent beam is then reflected back through the storage medium so that the reflected coherent light beam provides a phase conjugate of the reference beam and passes through the storage medium at the same angle and location that the reference beam passed through the storage medium during recordation of the hologram.

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