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> Commercial infrared cameras convert infrared light to an electric signal, which is then shown on a display screen. They require low temperatures, because of t
by the__alchemist 5y ago
> Commercial infrared cameras convert infrared light to an electric signal, which is then shown on a display screen. They require low temperatures, because of the low energy and frequency of infrared light. This makes conventional infrared detectors bulky and heavy – some security personnel have reported chronic neck injury due to regular use of night vision goggles.
This isn't how military etc NVGs work; they use optics, and don't have active cooling. Eg, a photocathode made with gallium arsenide.
- Junk_Collector 5y agoThis is very similar to current military optics. It just uses a GaAs meta-material surface instead of a GaAs microbolometer array. Fundamentally they are both semi-conductor microscopic antenna arrays. The abstract plays down current gen by choice of comparisons probably to drive funding interest, and of course the article does what science news articles do.