Process for recording holographic information
AssigneeYeda Research and Development Co. Ltd.
InventorsShymon Reich, Albert A. Friesem
Life of this patent
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Abstract
A method for recording spatially modulated optical data and for the recording of holographic information in real time, comprising preparing a photosensitive recording medium comprising a polymeric sheet containing a photosensitizer adapted to bring about a change of the refractive index of the polymer upon irradiation in the visible or in the UV range and recording the information by means of a holographic set-up.
Claims10
A process for recording spatially modulated data and for the recording of holographic information in situ and in real time by means of a device adapted to record a hologram on a recording medium, comprising means for effecting an exposure of said recording medium with an information beam from an object illuminated with spatially coherent electromagnetic waves and means for simultaneously exposing said recording medium to a reference beam of said spatially coherent electromagnetic waves to produce on said recording medium a hologram interference pattern between said information beam and said reference beam, said recording medium consisting of a polymeric layer of from some microns thickness to a few millimeters thickness of a lower-alkyl 2-cyanoacrylate containing p-benzoquinone as photosensitizer, said process comprising:
- exposing said recording medium with an information beam from an object illuminated with spatially coherent electromagnetic waves;
- and
- simultaneously exposing said recording medium to a reference beam of said spatially coherent electromagnetic waves to produce on said recording medium a hologram interference pattern between said information beam and said reference beam.
An apparatus for recording spatially modulated data and for the recording of holographic information in situ and in real time, comprising:
- a recording medium;
- information beam exposure means for effecting an exposure of said recording medium with an information beam from an object illuminated with spatially coherent electromagnetic waves;
- and
- reference beam exposure means for simultaneously exposing said recording medium to a reference beam of said spatially coherent electromagnetic waves to produce on said recording medium a hologram interference pattern between said information beam and said referennce beam;
- said recording medium consisting of a polymeric layer of from some microns thickness to a few millimeters of a lower-alkyl 2-cyanoacrylate containing p-benzoquinone as photosensitizer .
Dependencies are inferred from the claim text.