Hologram apparatus and hologram recording and playback method

Details Hologram apparatus and hologram recording and playback method Hologram apparatus and hologram recording and playback method

2007-12-25

2007-12-25

Amari, Alessandro (Department: 2872)

Optical: systems and elements

Holographic system or element

For producing or reconstructing images from multiple holograms

C359S900000

Reexamination Certificate

active

11204400

ABSTRACT:
A hologram recording and playback method comprises establishing in advance a test region adapted to record a piece of test data for each of a reference incidence angle and a plurality of stepped incidence angles of a recording reference beam in a recording medium, successively setting an incidence angle of the recording reference beam equal to the reference incidence angle or one of the plurality of the stepped incidence angles, successively recording in the test region each piece of the test data, causing a playback reference beam to be applied to the test region at the same incidence angle as the reference incidence angle to globally play back all the pieces of the test data, selecting the data with the maximum diffraction efficiency, and correcting the incidence angles of the recording reference beam and the playback reference beam based on the difference between the reference incidence angle or one of the plurality of the stepped incidence angles corresponding to the selected data and the reference incidence angle.

REFERENCES:
patent: 5777760 (1998-07-01), Hays et al.
patent: 7116626 (2006-10-01), Woods et al.
patent: 2004-177958 (2004-06-01), None

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