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  1. M

    405nm Laser with <100µm Focus

    Hey, im new and have some questions to the professionals here ;) Im building a Laser Exposer for PCB's, i use a old laser printer polygon mirror to control my beam. The laser diode is a "BDR S06J 12x" at ~350mA. My main problem is now to focus this beam to a size smaller then 100µm (0.1mm)...


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