Optical: systems and elements – Holographic system or element – For producing or reconstructing images from multiple holograms
Patent
1996-08-21
2000-07-11
Chang, Audrey
Optical: systems and elements
Holographic system or element
For producing or reconstructing images from multiple holograms
359 32, 359 7, 359 3, G03H 126, G03H 122, G03H 102
Patent
active
060881399
ABSTRACT:
Object rays and reference rays are projected to record interference fringes on a volume hologram comprising a material exhibiting a photoinducing refractive effect, and a reconstructed image is obtained by illuminating the volume hologram with reconstruction rays. When the wavelength .lambda..sub.1 of the object rays is longer than the wavelength .lambda..sub.2 of the reconstruction rays, the reconstruction is conducted by illuminating the volume hologram with a convergent spherical wave and when the wavelength .lambda..sub.1 of the object rays is shorter than the wavelength .lambda..sub.2 of the reconstruction rays, the reconstruction is conducted by illuminating the volume hologram with a diffused spherical wave.
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Chang Audrey
NGK Insulators Ltd.
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