Smoke detector and method of detecting smoke
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United States of America Patent
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Jul 21, 2009
Grant Date -
Nov 23, 2006
app pub date -
Mar 28, 2006
filing date -
Aug 23, 2002
priority date (Note) -
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Abstract
A smoke detector that includes at least one image-forming reflective surface, at least one light source and at least one light sensor. In operation, at least one light source emits light from a first area thereon and the reflective surface focuses the light onto a second area that includes at least one light sensor, wherein the first area is smaller than the second area.
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