I have a Lasos Nova50 green scientific laser "kit" to offer mesured at 46 mW @ 532 nm witha a good clean TEM 00 beam. The laser is 98% pure single frequency and totally useable for holography or low noise experinments, very stable. This runs off 12V or 24V DC. Ready to build the controller and a DC supply into a box? $400 with free USA shipping! Phil 142laser