Holographic screen

Details Holographic screen Holographic screen

2005-08-02

2005-08-02

Assaf, Fayez G. (Department: 2872)

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

C359S599000, C359S032000, C359S001000, C359S453000

Reexamination Certificate

active

06924912

ABSTRACT:
A holographic screen for displaying images by diffracting and dispersing an image beam projected by an image projector comprises a main hologram for diffracting and dispersing an incident image beam from one of an upward angle and a downward angle, and a directional dispersion hologram, disposed on an image projector side of the main hologram, for dispersing and transmitting part of the image beam within a predetermined angle range centered on a direction of incidence thereof, and directly transmitting another part of the image beam, thereby providing a holographic screen that can maintain the brightness and improve the color reproducibility of a displayed image.

REFERENCES:
patent: 6288803 (2001-09-01), Hattori et al.
patent: 11-202417 (1999-07-01), None

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