Chromasens CD40127_R02 allPIXA_pro_User Manual.docx
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4.2 Design of the allPIXA pro camera line scan sensor
The allPIXA pro camera color line scan
camera is equipped with a trilinear CCD line
scan sensor with 3 spatially separated lines
which are sensitive to the colors red, green
and blue (RGB).
In this way, 3-color information is obtained
from each image point (RGB). The spacing
of sensor lines is compensated in the
allPIXA pro camera.
Compared
to
camera
systems
with
interpolating processes (for example single-
line or bilinear color line scan cameras), the
color information is acquired with 3 x 8 bit
for each image point.
Take notice that high-quality color detection
is only possible in that way.
Sensor pixels are 10 µm wide and 10 µm
long. The distance between the color
sensor lines is 40 µm.
Spatial correction is achieved by the
corresponding delay of the individual items
of color information. As a result of the
object’s movement, for example, an object
point first reaches the blue sensor line, then
the green sensor line and finally the red
sensor line.
These 3 color channels are then combined
into a complete image.
Continual scanning provides a color image
which can theoretically be infinitely long.
Figure 12: allPIXA pro camera line scan sensor
