Optics: image projectors – Stencil or perforated plate projector
Reexamination Certificate
2008-04-15
2008-04-15
Dowling, William C. (Department: 2851)
Optics: image projectors
Stencil or perforated plate projector
C353S122000, C353S121000
Reexamination Certificate
active
11230733
ABSTRACT:
The invention is related to methods and devices for generating spatial images. The method comprises forming at least two directional radiation beams in a selected viewer's plane, each of the at least two directional radiation beams having a power from 0.05 to 10 of a human eye differential threshold for a current viewing condition, and directing at least two directional radiation beams to intersect and form a light spot at a crossover point, the light spot having an angular dimension corresponding to an angular resolution of a human eye and making the light spot visible from any point within the viewer's plane. Imaging is provided by means of a spatial displacement of a crossover point with an appropriate variation of brightness and/or color of said point, if required.
REFERENCES:
patent: 4870485 (1989-09-01), Downing et al.
patent: 5871267 (1999-02-01), Wende
patent: 5943160 (1999-08-01), Downing
patent: 6466184 (2002-10-01), Scheps et al.
patent: 2055315 (1996-02-01), None
patent: WO 00/11513 (2000-03-01), None
Dremlyuga Anton A.
Kokhanov Andrey V.
Zheltov Georgy I.
Dowling William C.
Houston Eliseeva LLP
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