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Thanks to a new technology announced today by Kodak, you
will soon be able to buy a cell phone with a 5 megapixel camera.
Practically, Kodak has redesigned the basic building blocks
used to collect light and is incorporating that technology into a brand-new
sensor.
KODAK KAC-05020 Image Sensor, the world’s first 1.4 micron,
5 megapixel device, was created by combining Color Filter Pattern technology
with a new CMOS pixel.
Kodak’s new sensor enables a new level of resolution in
small optical formats, using significantly smaller pixels. But unlike other
small-pixel sensors which can produce poor images, especially under low light
conditions, the 1.4 micron pixel used in the KAC-05020 Image Sensor changes
this convention, providing image quality that can equal or surpass what is
available from current devices using larger, 1.75 micron pixel CMOS design, the
company said in a statement.
As you might know, the signal in a standard CMOS pixel, is
measured by detecting electrons that are generated when light interacts with
the surface of the sensor.
Therefore, as more light (signal) strikes the sensor, more
electrons are generated, which leads
to a higher signal at each pixel. In the Kodak Truesense CMOS
Pixel, the underlying “polarity” of the silicon is reversed, so that the
absence of electrons is used to detect a signal. This change enabled a series
of improvements to the design and structure of the pixel that ultimately
results in CMOS imaging performance that rivals that available from CCD image
sensors.
Kodak Truesense Color Filter Pattern, which adds
panchromatic, or “clear,”
pixels to the red, green and blue pixels already on the sensor, is used to enhance
the light sensitivity in the new sensor. This provides a 2x to 4x increase in
sensitivity to light (from one to two photographic stops) compared to current
sensor designs, improving performance in low light and reducing motion blur in
action shots.
Kodak will showcase its new product at the GSMA Mobile World
Congress held Feb 11 – 14 in Barcelona,
Spain.
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