Method and apparatus for phase correlation holographic drive

Details Method and apparatus for phase correlation holographic drive Method and apparatus for phase correlation holographic drive

2005-06-21

2005-06-21

Nguyen, Thong (Department: 2872)

Optical: systems and elements

Holographic system or element

Having optical element between object and recording medium

C359S035000, C359S001000

Reexamination Certificate

active

06909529

ABSTRACT:
A holographic storage apparatus for recording data in a holographic medium includes at least one light source for generating a reference beam and a signal beam. The reference beam is preferably a phase beam of unchanging phase content. The apparatus also includes a holographic medium placed in a path of the reference beam and a path of the signal beam. The holographic medium has a first face and both the reference beam and the signal beam enter the holographic medium through the first face. The holographic medium also includes a data reflective surface. The reference beam and the signal beam interfere in the holographic medium to create a hologram only after at least one of the reference beam and the signal beam have reflected off of the data reflective surface.

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