Two different things. FLIR imagery displays contrasts in heat/cold. NVS is all about light amplification. So, unless these uniforms have some sort of property to defeat body heat emission, FLIR will still detect the soldiers wearing them.
How well would Space Blanket type material hide a body from FLIR?
Good post.
FLIR detects thermal radiation.
NVS detects visible light that is reflected by a light source (that can be detected by others).
Unless you are stone cold, FLIR will spot you. It is so crispy, I was in a field class when FLIR first deployed and could easily tell a 5.56 round in a pocket from a 7.62 round in the other pocket.
No burqa or any other clothing can evade FLIR.
If you look, the new camo (and it is camouflage, not a cloak of invisibility) includes hoodies, facemasks and gloves. These were not a normal part of camo in the past.
Like the article said, a lot of work went into reducing the IR signature.
IR detection equipment isn’t the end all-be all. It has limitations, like every other technology. That the Germans have been working on hiding IR emissions from troops is not surprising at all.