Mitsubishi Electric KD Series User Manual page 24

2-3 Definition
【 Depth of illumination 】
【 DOI of KD series 】
【 Spectrum of illumination 】
TM-XG537C
CIS output at focal
position
Object position is getting closer.
Object position is getting
further.
Pixels in a line
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【 Definition of CIS output 】
3. Light intensity
This indicates a strength or intensity of the light on a
surface of the object. As described on the left, CIS output
Vp is controlled by "Light intensity (I)" * "Storing time (T)".
Therefore, in order to increase scanning speed, Light
intensity is also needed to be increased.
4. DOI : Depth of Illumination
It is shown in the figure on the left of the variation of
illumination intensity due to the position of the lens optical
axis direction of the object. If the object at a position close
to the illumination system is present, the CIS output is
large, the original is away from the CIS output will be
reduced.
Larger variation of DOI would make a difficulty to
recognize that the output variation is caused by reflectance
of the object or position of the object.
5. Spectrum of illumination
This product comprises white LED array as a built-in
illumination. Refer to the spectrum of illumination on the left.
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