Re: Alignment of a beam expander

"Helpful person" <rrllff@xxxxxxxxx> writes:

> Or buy item 7582174470 from Ebay. About $35 for a HeNe laser.

Looks like that's only the laser head, no power supply.

I have ~1 mW HeNe lasers with 12 VDC input power supplies for $25. but a
$1 laser pointer would probably work almost as well.

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