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It's may be not relevant for your project, but I had the idea for a artificial star for a long time. Too many projects, no time to make it...
Here how I would do it;
the size is important, so get a piece of fiberglass. Put it in a box folded
back from a collector to a black piece of sheet. The collector could be a lens or a mirror at 45 deg. The contraption can be very small.
The benefit of this is that it's passive. You just place it 20m away and put your laser pointer at the scope finder bracket. Aim at the collector and the
fiber glass will guide the light to a small point of light. You can live the passive box there, not need to go and switch on and off...
what you think?
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