Image Engineering
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measured when doing a shading measurement. Therefore, it measures the emission in the
direction towards the device under test (e.g., a camera system). Choose a reference point on the
chart for the calibration. When using an OECF chart, we recommend the field with the lowest
density.
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Illuminance calibration
: Illuminance is a measurement in lux of how much light illuminants a
surface. In other words, it is a measure of the illumination in the direction of the light source and is
not suitable for a measurement on the chart.
Be sure to perform the calibration in a fully darkened room. Any foreign light pollution
will result in measurement errors, and an external measurement device is needed to
calibrate the Vega. We recommend using a Class L
Luminancemeter/Illuminancemeter.
Open the context menu of the module you want to calibrate to start the calibration process.
Figure 8: Module Context Menu
Figure 9: Calibration - Reference
The internal Sensors of the Vega perform a reference measurement. This measurement can
take up to a minute.
Figure 10: External Measurement Device needed
Take your reference measurement on a suitable region with your external measurement device
and select OK. In the following dialog, you can set the measured luminance or illuminance
value.
