okay, I will try to find some more IR lights. The IR filter is removed and I have 2 layers of photo negatives on my webcam, if I use only one layer of photo negatives then i have major IR hotspots. My IR light looks like this:

There’s one thing you could try, because many does this wrong (including me, who also tried this the first time). The photo negative you put inside your webcam needs to be overexposed, which can be harder to find. Overexposed film comes from a picture taken when the lens is completely blinded by light. The photo negative will then turn out really dark. What I did instead of go looking around for the photo negative was that I used a floppy disc. Try that for starters

jordanfb - 08 July 2008 12:07 PM

okay, I will try to find some more IR lights. The IR filter is removed and I have 2 layers of photo negatives on my webcam, if I use only one layer of photo negatives then i have major IR hotspots. My IR light looks like this:

Right now I’m using 2 IR illuminators like this one:

Good point, they’re very powerfull. Negative point, the IR light is too focused at one point.

But the problem you’re having is going to be almost the same if you place a bigger illuminator; the balance between good strong IR light and the hot spots reflected at glass is too hard to find. Try to avoid the hot spots and flood the glass with as much IR light as you can. There will always be zones with a high sensitivity and great blobs and some other zones of your screen with a low sensitivity and poor blobs detected. That’s the problem with the IR illuminators; I think, the best performance will always be acheived with a custom illumination setup.

Cheers!