HOLOGRAM RECORDING METHOD USING BEAM WITH VERY LARGE...

Optical: systems and elements – Holographic system or element – Having optical element between object and recording medium

Reexamination Certificate

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C359S900000

Reexamination Certificate

active

06842273

ABSTRACT:
A hologram recording method using a beam with a very large incident angle includes the steps of generating a sheet beam as the reference beam, and introducing the reference beam into the recording medium at an incident angle of at least 70°. A hologram reproduction apparatus using a holographic reflector includes a light, a holographic reflector, an adjustor, and a hologram. Also, the hologram reproduction method using the hologram reproduction apparatus includes the steps of irradiating a beam emitted from a light source as a reference beam to a holographic reflector, reflecting the reference beam illuminated to the holographic reflector therefrom to generate a reconstructed beam, and allowing the generated reconstructed beam as a reference beam to pass through a hologram to reproduce the hologram. A flat display element apparatus comprises a light source, a holographic reflector, an adjustor, and a flat display element.

REFERENCES:
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patent: 5455693 (1995-10-01), Wreede et al.
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patent: 9963395 (1999-12-01), None
Toshihiro Kubota et al.; “Method for reconstructing a hologram using a compact device”; Applied Optics, Optical Society of America, Washington, US, vol. 31, No. 23, Aug. 10, 1992, pp. 4734-4737.
European Search Report issued by the European Patent Office on Jun. 16, 2004 in corresponding application.

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