Calibration - Image Engineering camSPECS User Manual

4.10 Calibration

A calibration device is delivered with the camSPECS hardware. A positioning plate for the aperture of the
fiber is also included in the delivery. Easily place the plate in front of the filters and mount it, so the
missing hole is at the bottom right (see the image below). There is no filter at this position on the front
side of camSPECS. Insert the measurement head securely in each hole of the plate.
Now plug the calibration device with the USB cable into the computer and switch to the Calibration
module. If the calibration device is detected, the radio button
Filter Calibration is selectable, and some information about
the connected device is displayed. The calibration
procedure should be carried out in a dark place and
requires approximately 10 minutes. The order of the filters
measured includes a dark measurement first, followed by all
color filters from upper left to lower right, and finally, all the
neutral density filters from upper left to lower right. Before
switching to the ND filters, perform a second dark
measurement. Each measurement's result is displayed: the
The calibration plate
spectral distribution, the center wavelength of the filter peak,
and the calibration value. The calibration value is the area
under the curve (AUC) in the interval with the lower and upper limits specified at the 10 % threshold of the
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