[spiorf]

It works even on cheap webcams. Remove the piece of blue glass and replace it with the black plastic that covers the ir leds from an old remote.

[vlachen]

I did it back enough in the day that I used a negative from getting pictures developed. I think I got the idea in Hardware Hacking Projects.

[atahanacar]

I did the same too, but funnily enough I stumbled upon it by accident when I was trying to find things that pass IR through but not visible light (like coke, sunglasses, ink etc.) using my Sony camera with nightvision mode. I was on a quest to get "x-ray vision".

[bb88]

I have one where I just removed the filter and added some IR led's for my 3d printer cam, that way I don't need visible light and the room can stay dark if I need it to be.