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  1. R

    Yee olde exposed film IR PASS FILTER

    Everyone knows that a couple of layers of developed exposed color print film makes a good Infrared Pass filter that blocks visible light. The question is, how good does it block visible light and pass Infrared? The following link: > Film makes infrared...
  2. R

    IR Filter Retaining Method

    To retain an IR Filter in the head cap of a pointer, I find that an "O-ring" located as shown, works very well rather than gluing. Use an "O-ring" that has an outside diameter slightly larger than the inside diameter of the head cap. Several advantages of this method are: not messy like gluing...
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    Infrared Filter

    I just purchased a <200mW Green laser pointer which has no infrared filter. I am wondering if an infrared filter removed from a Web Cam would work to block Infrared from my naked laser. I have no way to characterize one other than the fact that most Web Cams use a CMOS detector all of which I...


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