Bayer Innovation Gmbh

Attila Sütö

Gábor Erdei

The invention relates to a method for reading a Fourier hologram recorded on a holographic storage medium with a holographic storage system. The method comprises the steps of: &#x2014;calculating a characteristic value from a detected image of a reconstructed Fourier hologram in at least two relative positions of a reference beam and said storage medium, each of the characteristic values being indicative of a misalignment of the reference beam and said storage medium at the respective relative position, &#x2014;calculating a servo value from the measured characteristic values, &#x2014;determining an aligned relative position of said reference beam and said storage medium by means of a predetermined servo function using the calculated servo value, &#x2014;setting the relative position of the reference beam and said storage medium to said aligned relative position, and&#x2014;detecting an image at said aligned relative position. The invention also relates to a holographic storage system for reading a Fourier hologram recorded on a holographic storage medium, said system comprising reference beam generating means, storage medium receiving means and a detector for detecting a reconstructed hologram. The system further comprises a servo control unit for executing the method according to the invention.

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Kartal, Hungary

Attila Sütö