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  • gdesmarais commented on randofo's instructable Floppy Disk IR Camera Hack2 months ago
    Floppy Disk IR Camera Hack

    The filter over the CCD sensor is actually a polarizing filter. It let pass the reflected light (polarized) while blocking the direct light (non polarized). It improve contrast in high luminosity environment. An IR & anti-reflective coating is likely to be included on the front side of this filter

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