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TITLE: FULL-COLOR IMAGE SENSOR CHIP
Foveon, a start-up founded by Dr. Carver Mead, has developed
a full-color image sensor chip which uses three layers of photo-
detectors embedded in silicon. The layers are positioned to
take advantage of the fact that silicon absorbs different colors
of light at different depths, so one layer records red, another
layer records green and the other layer records blue. This means
that for every pixel on a Foveon X3 image sensor, there's
actually a stack of three photodetectors, forming the first
capture system with a full-color image sensor.
All other image sensors feature just one layer of photodetectors,
with just one photodetector per pixel. To capture color, pixels
are organized in a grid, or mosaic, resembling a three-color
checkerboard. Each pixel records just one color, requiring
interpolation which leads to color artifacts and a loss of image
detail.
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FILENUMBER: 1043
BEGIN_KEYWORDS
FULL-COLOR IMAGE SENSOR CHIP
END_KEYWORDS
DATE: February 2002
TITLE: FULL-COLOR IMAGE SENSOR CHIP
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