Pearleye ND filter for measuring high temperatures ?

Each way to reduce the light is possible to image objects with a higher temperature.
A lens with a lower light value, a semi-transparent mirror, or a small aperture are possibilities to shift the temperature range of the Pearleye.
Additionally, it is necessary to calibrate or at least adjust the sensor amplifier.
Without calibration, the temperature measurement error is quite big and the thermal image provides only an inaccurate relative temperature difference.
It is possible to adapt the Pearleye up to 1000°C, but we are not able to calibrate the Pearleye for higher temperatures than 400-500°C.
Consider also the temperature environment of the camera.

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