
Not only can you blind cameras with infrared LEDs, lasers work as well.
Your first thought might be,”It’s really hard to shine a laser at a camera and do something at the same time!”. Not when you mix a tripod and a gun’s laser scope.
One major limitation of this method is the fact that most lasers only emit one color, therefore it is fairly easy to filter the color using optical and electronic methods unless multiple colors are used.
Another limitation may involve exactly how to locate cameras, as they can be hidden anywhere.
Michael Naimark can say a whole lot more about the camera zapping subject with laser beams than I can. Have a look at his excellent document on this interesting subject.
How to ZAP a Camera: Using Lasers to Temporarily Neutralize Camera Sensors - by Michael Naimark [via How To Do Stuff]