Holographic storage system with apodization filter
AssigneeThomson Licensing
InventorsGabor Szarvas, Krisztian Banko, Zoltan Karpati, Szabolcs Kautny
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Abstract
The present invention relates to an apparatus for reading from and/or writing to holographic storage media, and more specifically to an apparatus for reading from and/or writing to holographic storage media having an apodization filter. According to the invention, an apparatus for reading from and/or writing to a holographic storage medium, with a collinear split aperture arrangement of a reference beam and an object beam or a reconstructed object beam, includes an apodization filter for the reference beam.
Claims8
Apparatus for reading from and/or writing to a holographic storage medium, with a collinear split aperture arrangement of a reference beam and an object beam or a reconstructed object beam, including an apodization filter for the reference beam, wherein a transmission of the apodization filter has a gradual decrease in a range from an inner radius to an outer radius around a cut-off radius between 0.67 and 1.27 times the Nyquist aperture.
Method for shaping a reference beam in a collinear split aperture arrangement of the reference beam and an object beam or a reconstructed object beam, having the step of apodizing the reference beam with an apodization filter, wherein a transmission of the apodization fitter has a gradual decrease in a range from an inner radius to an outer radius around a cut-off radius between 0.67 and 1.27 times the Nyquist aperture.
Dependencies are inferred from the claim text.