[jnovacho]

Virtually any LCD screen will produce polarized light. This is the core working principle of those screens. So if you use a polarized filter (sunglasses for example) it will completly block the image coming from the screen.

You can see the effect here: https://www.reddit.com/r/mildlyinteresting/comments/crvpil/t...

I believe this will not work with OLED screens though, but I do not have one to test this.

[PxldLtd]

We use IR Floodlights + IR absorbing film + a high speed IR camera. Works great in most lighting conditions and the screen doesn't show up on the camera.