Yes: https://www.instructables.com/id/The-Invisible-Face-Mask-/ https://www.instructables.com/id/The-Invisible-Face-Mask-/ Many surveillance cameras use an IR

Yes: https://www.instructables.com/id/The-Invisible-Face-Mask-/ https://www.instructables.com/id/The-Invisible-Face-Mask-/ Many surveillance cameras use an IR cut-off filter for their "day" or color mode though, so this may not work then (or at least, not work as well, depending on the cut-off filter and LED wavelengths).