Uploaded October 2015 | Updated September 2026, 2 weeks ago

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In this video I take a look at the basic workings of thermal cameras, microbolometers, specifications and datasheets.

Topics covered.

* How does a thermal camera / imager work?
* What is a microbolometer?
* How to use a thermal camera / imager?
* IFOV - Instantaneous field of view / spatial resolution.
* Distance to spot ratio
* Thermal camera field of view and resolution.
* NETD - Noise equivalent temperature difference - thermal camera sensitivity.
* NUC - Non uniformity correction - thermal camera / microbolometer calibration through a blackbody shutter.
* Temperature span vs colour (color) palate.
* Emissivity and reflected IR (infrared)
* Thermal camera image update speed / performance
* Thermal camera accuracy
* Thermal camera focus

Cameras used in demonstrations:

* Opgal Therm-App TH
* Fluke Ti90
* FLIR E4
* HT Instruments THT45
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Music clip from Youtube Music Library - Phase Three by Huma-Huma
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