What is the difference between low light night vision device and infrared thermal imaging device?

2021-08-02

Basically speaking, ordinary infrared night vision device is called active night vision device, infrared thermal imaging night vision device is called passive night vision device. From the literal understanding, ordinary infrared night vision device, the active infrared night vision device, the target needs to have light, so the traditional name is low-light night vision device, its principle is to target faint light, through its internal core part of the image tube, to magnify the light can be observed by the human eye, so this kind of active night vision device, in the case of total black,can’t see any target, so this kind of night vision device is equipped with an infrared emitter. Which in the case of total black uses in the visible infrared light to illuminate the target. Make the target visible.

The passive thermal imaging night vision device is completely different from the former. It uses infrared detectors, optical imaging objective lens and optical machine scanning system (currently advanced focal plane technology eliminates optical machine scanning system) to accept the target under test.

This picture is taken by low light night vision device

This picture show a black panther taking by infrared thermal imaging night vision device