We keep the perspective!
But what good is the best infrared camera if you can’t see inside closed systems? We have also come up with a trick for this, but the transmittance (thermal transmittance) of a material must be known. In order to be able to “see inside” closed computer housings, for example, we need a foil that is as thin as possible and whose transmittance (thermal transmittance) is still high enough to be able to use it for plausible measurements.
In this way the original airflow in the case is preserved and also the waste heat cannot escape so easily through an open side panel. The following figure shows a system measurement with a total of nine different measuring points, which were previously defined individually with the correct emissivity and transmittance.
Of course, we don’t want to withhold what a housing measurement with a “simple” handheld camera looks like. For this purpose, we have used our own archives:
Already years ago I developed together with Lian Li (still in the old aluminum era) a suitable benchtable, which also works closed and which can de facto simulate a closed case well:
I included the story with the calibrated foil at that time, so that for the first time measurements into the closed case were possible:
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