I just finished my lens "tube" that will collimate the light from an IR emitter. For now, I am going to test the focal distance with an ultra bright red LED with a 30 degree cone. I need to get an IR emitter with a 20 degree cone given my 30mm lens and 70mm focal distance (roughly). Too bad I didn't first check the accuracy of the hole with a yet print! The Replicator 2 printed a 4.4mm hole, whereas I modeled a 5mm hole. On the UP!, it probably would have been closer to 4.9mm.
UPDATE: Correction on the measurement -- I failed to realize that because I set the leveling such that the first layer gets smashed onto the build platform, the hole was smaller than it should have been. I measured the opposite side of the hole at 4.84mm, so it was pretty close after all. My bad!
I'll drill out the hole tomorrow and hook up the LED to a power supply once I am at the office. Stay tuned for pics!
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