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Here’s my prototype 455nm laser head, constructed from the front section of an Aixiz module threaded into a heatsink from an old ATX power supply. This sink has enough thermal mass for short 1W testing.
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Connection to the laser diode at the back of the heatsink. Cable is heat shrink covered for strain relief, & hot glued to the sink for extra strain relief.
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Looking down the beam, laser is under the camera. Operating around 1.2W here
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Camera looking towards the laser. Again operating at ~1.2W output power.