Today I will show you how to prepare the camera for infrared laser detection. As a rule, any webcam will do the trick. Higher resolution will allow for greater precision, and more FPS will result in greater responsiveness. I will use the ELP camera. I recommend this type of equipment because it is intended to computer vision systems. Interchangeable lenses, also with variable focal length can be useful which is just one of the advantages of this solution.
So here we go. Disassemble the camera and remove the IR filter. It's that pinkish glass. In some cameras they can be unscrewed, in others they have to be prized off with a sharp tool. That's it. Our camera sees infrared. The next step is to block visible light. Thanks to this, the camera will only see our laser.
For this we will use a visible light filter, in other words IR pass filter. The easiest way is to simply buy it. The visible light filter may be in front of or behind the lens. I mounted it on a ring that I printed on a 3d printer. Thanks to this, I can take it off if I need it. Remember that in the room we use, it is worth having the windows covered because the sunlight contains a lot of infrared and the visible light filter will let such light through. This will make laser detection much more difficult.
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