30
C5 Series User Manual Rev. 1.4
The FIR Peak Mode (FIR PEAK)
In this mode the first derivative of the intensity Gauss curve of laser beam profile is
calculated.
The position of zero-crossing of first derivative is detected and output with subpixel
accuracy (up to 6 subpixels). In this case the threshold AOI_TRSH is used to detect the first
rising edge of the derived intensity signal. Valid values of AOI_TRSH range from 513 to 1023
(Mono16).
More details regarding the operation of the FIR Peak mode can be found in
a separate application note.
First
Derivative
of Intensity
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