Reproducing apparatus and reproducing method

Details Reproducing apparatus and reproducing method Reproducing apparatus and reproducing method

2007-11-29

2010-11-16

Allen, Stephone B (Department: 2872)

Optical: systems and elements

Holographic system or element

Copying by holographic means

C382S100000

Reexamination Certificate

active

07835049

ABSTRACT:
In a reproducing apparatus adapted to reproduce data recorded on a holographic recording medium, a reference light generator generates reference light for illuminating the holographic recording medium, and a coherent light generator generates coherent light having an intensity greater than the absolute value of a minimum amplitude of a reproduced image and having a phase equal to the phase of the reproduced image. An image signal acquisition unit senses the reproduced image produced by illuminating the holographic recording medium with the reference light and the coherent light, and acquires an image signal based on the reproduced image. A square root calculation unit calculates the square root of each of values constituting the image signal. A removal unit removes the component of the coherent light from the calculated square root, whereby the data recorded on the holographic recording medium is correctly reproduced.

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