> 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.