4.3.2 Correction of Camera Calibration
Due to the thermal drift of bolometers all measuring IR cameras need an offset correction every
few minutes.
This correction is done by a motor driven motion of a blackened metal piece (so called flag) in the
front of the image sensor. In this way each image element is referenced with the same tempera-
ture. During those offset calibrations thermal cameras do not measure (time is dependent on
model and video mode). In order to minimize this disturbing effect the offset correction can be
initiated manually or by an external control pin at a suitable point of time.
In the Devices and Refresh flag menu or via the Icon on the toolbar the Flag (Shutter) can be refreshed
manually.
The automatic correction of camera can also be set by defining minimum or maximum intervals via the menu
Tools, Configuration and Device.
The options Flag automatic and Min. Interval control that the flag will not be released before a given
time period even though it might be required by the thermoIMAGER TIM. If the Max. Interval is defined
the flag will always be released after a certain time period even if not required by the thermoIMAGER TIM.
Fig. 34 View Flag
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