Hologram screen and hologram display

Details Hologram screen and hologram display Hologram screen and hologram display

2005-10-04

2005-10-04

Assaf, Fayez G. (Department: 2872)

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

C359S019000, C359S009000, C359S001000, C359S032000, C359S449000, C359S454000, C359S630000

Reexamination Certificate

active

06952295

ABSTRACT:
A hologram screen1displays an image by diffracting and scattering image light31projected from an image projection apparatus2. An upward/downward light scattering device13, which scatters light incident from an upward/downward specific angle range spreading obliquely upward or downward, is placed on the image projection apparatus side of a hologram device12in the hologram screen1. A leftward/rightward light scattering device14, which scatters light incident from a leftward/rightward specific angle range spreading obliquely leftward and rightward, is placed between the hologram device12and the scattering device13. The construction is such that the upward/downward specific angle range contains the incidence angle of the image light31on the hologram screen1, and thus provides a hologram screen having good color reproducibility and which permits viewing of the background.

REFERENCES:
patent: 6424395 (2002-07-01), Sato et al.
patent: A-11-202417 (1999-07-01), None

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