This week I received a new >50 mW dpss laser. Great toy but the beam really is TEM01 with a weak and strong side.
The laser looks like the CNI model and probably is but it is resold by a German seller, in my case through ebay.
I paid for "excellente strahlqualiteit, stabilitat and divergenz" (excellent beam quality etc.) and of course prefer a near round beam.
Some pics of the actual spot are here .
How bad is this? Is it acceptable for a blue or not?
Your judgement is much appreciated.