Fresnel image floater
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Apr 23, 2002
Grant Date -
Jan 31, 2002
app pub date -
Feb 2, 2000
filing date -
Feb 2, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An image projection device includes a Fresnel lens positioned in an optical path of an illuminated image in such a way that light from the image passes twice through the Fresnel lens, once in each direction. The first optical element may be a planar mirror arranged to reflect light transmitted by said Fresnel lens in the first direction back through said Fresnel lens in the second direction. In addition, a second optical element may be provided for changing a path of light exiting said Fresnel lens in said second direction so that the projected image appears at a location away from the path of light from the image source to the Fresnel lens.
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