I just realized this morning after about 3 days of owning this thing that I have negative divergence. Beam comes out about 2mm X 4mm, and comes to a pinpoint about 4-5 feet out. Burning at that spot is apocalyptic (output is a little over 1W to begin with). My initial divergence test the day I got it at 20 meters gave me around 2.3mRad, which I was perfectly happy with assuming DL eventually releases a new beam expander down the road, but I always thought beams with negative divergence had mRad ratings far worse than the 2 range. But I figure I'm measuring wrong giving the negative initial value.
And furthermore, what does this mean for compatibility with the beam expander? Will it simply not work, or do something crazy like cut the negative divergence by 10 so my pinpoint is that much further out.
That's a scary thought.
And furthermore, what does this mean for compatibility with the beam expander? Will it simply not work, or do something crazy like cut the negative divergence by 10 so my pinpoint is that much further out.
That's a scary thought.
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