Small Visible Light Filter?

[Lord of nothing]

Hi
I looking for an small Visible light filter who lead just IR Light passt.
The max size is 1cm diameter for the Webcam. Sure full clear.
Maybe someone know an cheap Ebay Seller.
Thanks!

[Don Hills]

Look around, you might have something suitable. One effective filter that isn't common any more is the overexposed leader end from developed colour negative photographic film. Some other common items appear black but are transparent to IR. You can use a IR remote control and digital camera to examine the characteristics of likely candidates. 

[Lord of nothing]

Sorry I haven't anything who is that clear to use it (even temporary).