These new ones would be wild, I’ll see if I can get a demo this year somewhere.
Basically it said infrared goggles use digital processing, so there's at least one frame of lag for every image, which can cause those issues. Image intensifying googles are totally analog so there's no lag to avoid that issue.
Well, 24 fps vs 120 fps would technically matter, to the point where at a high enough frame rate you could not possibly tell the difference; I suspect it's more like 48 fps (if it's a constant 48 fps) than 120 *
Sounds like (slightly exaggerated) VR sickness symptoms, e.g. when there's too much latency between head movement and vision updates. Some people are more sensitive to this than others.
I don’t get any motion sickness with Gen3 IIT’s even moving fast, but with digital systems there’s a latency in refresh rate that becomes very disorienting.
The thermal part of the combined system is digital - in the units I’ve looked at, the image from the thermal is “projected” into the IIT’s lens. So while the image from the IIT alone is lag free, the thermal overlay does have lag and can mess you up a bit.
I’ve played with some older kit that was somewhere around 14hz or so and was fucking awful, felt like being ill after walking around in them!