Projector having a plurality of retro-reflectors

Details Projector having a plurality of retro-reflectors Projector having a plurality of retro-reflectors

2005-10-11

2005-10-11

Koval, Melissa J (Department: 2851)

Optics: image projectors

Reflector

Plural

C353S122000, C349S005000, C359S858000, C362S297000

Reexamination Certificate

active

06953252

ABSTRACT:
A projector having a plurality of retro-reflectors. In one embodiment of the present invention, a projector includes a light source, an image forming device, a concave reflector, and a plurality of retro-reflectors. The concave reflector is positioned adjacent to the light source to reflect light emitted by the light source toward the image forming device. The plurality of retro-reflectors is configured to reflect light emitted from the light source toward the concave reflector and is positioned as sets at different respective distances from the light source.

REFERENCES:
patent: 5842767 (1998-12-01), Rizkin et al.
patent: 6227682 (2001-05-01), Li
patent: 6332688 (2001-12-01), Magarill
patent: 6356700 (2002-03-01), Strobl
patent: 6830340 (2004-12-01), Olson et al.

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