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Two distinct replies to that.... 1 Its all fun and games until somebody loses an eye. or 2. and a condom. take your pick.

Sites mentioned, but my favorite resource is: http://batteries.parametrek.com/index.html?size=26650

Probably not quite! unless you've changed your account. :rolleyes: But a long time nevertheless. Hope you get the host sold 😀

Guys, I'm surprised no one has mentioned - this is a 532 not a 520. It HAS way more than 5mw NO MATTER WHAT. Its a DPSS not a diode, probably 50-100mw minimum and unless it has a very good filter, which is very very unlikely, a good portion of that will be pouring out the front of the laser...

Very cool that you can do this, but too rich for my blood. Sorry. I love what you have been able to do with this though. Its incredible you can cool these to that extent. Shifting 20+ nm in wavelength and keeping the temperature there is remarkable. I recall seeing this done with liquid...

thank you for awesome suggestion!

thanks for hard work and upkeep, I'm sure it takes a lot to keep up. I've only eceived one. Not the kind of thing you want to get on here. thank you!!!

Old thread - try survival laser under misc parts and tools

I had seen the modules on here - on and off, but didn't realize they had a pointer, too bad about shipping. Maybe when they sort out the battery issues it will be better. 589nm would be much more to my liking though!!! Module or pointer in that price range and I'd be on it. :)

Alibaba has a handheld lasence yellow-green pointer for $90. I don't know enough about Alibaba to venture trusting them, as I've only ordered from them once, but I've seen the modules on here. It appear they now have a handheld - video is also on the link. Looks very low power but definitely...

Simple examples. Take a green laser and a red laser and point it at your skin (if you are stupid). you will feel the effect of a green at a much lower mw than the red. Its not necessarily the wavelength being longer or shorter. I have seen a 405nm laser smoke things with low mw rating because...

I bought a new green HeNe from them a few years ago, super price at the time and I still have one of their original brass mounts that are for 5.6 or 9 mm diodes, believe it or not :rolleyes: Reputable source!

awesome - post a picture of completed laser when you can. Nice to see it seems to be working properly :)

If you are into GITD laser stuff, check out dkumpula on PL He has several GITD projectors and always has a very cool display at SELEM. The Projectors run at a very slow scan rate and may take 5 - 10 min to draw the image on the GITD background but with the strontium paint it will glow for quite...

Not that we aren't trying - But - It was suggested by someone that you try https://holowiki.org/forum/ for your questions. They should be able to help you.

You are absolutely right and If price isn't too high I'm interested also. You can't get it new - especially a tunable one. But, I bought my last couple of yellow HeNe lasers for about $100 each with driver and my orange was about $500, only they are less then 5mw. I think its a great project...

I missed this post the first time through. Much cheaper than a SP127

I really don't know - I'm not into holography, although I would like to be :)

Spectra Physics 127 40mw HeNe - polarized Not cheap https://www.ebay.com/itm/274482853124?hash=item3fe873f504:g:KeEAAOSwmKdfUd48 https://www.ebay.com/itm/384064857874?hash=item596c0ca712:g:q8cAAOSwI-xgX-yJ Be super careful with shipping, you are dealing with a 4' glass tube that will break if...

https://docs.lambdawave.eu/tools/relative_brightness_calculator.html this will give you a pretty accurate answer. So about twice as bright. - I hope you are wearing goggles for these as they will literally, light up a room and without goggles are very dangerous. I have a 1 watt green I...