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Want to try blue (445/450nm), wondering how cheap I can get in.

MapsAndLegends

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Hey, so I'm a newbie to lasers, introduced myself a couple weeks ago. Getting kind of addicted to 301/3-style lasers, have bought a few of them via ebay with mixed results, some really nice, some crapola.

I'd like to try an actual blue laser (445/450nm), see what that's like. Looking on ebay it looks like those don't come in the 301/303 size, but most commonly in the form of a silver cylinder with a bunch of parallel rails around it, in the $45-70 range. There are a few other designs with similar prices. OK, so it looks like it's going to be slightly more expensive to get into blue lasers than the rest.

BUT... I just noticed that there are a couple supposedly 450nm blue lasers in the "little bitty pen" form factor, running about $20 --


Does that seem plausible? A pen-style laser wtih a 450nm beam? Cause I wouldn't mind dipping my toe into 450nm with one of those if that's for real...
 



paul1598419

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Many of the 445nm laser use A140 or M140 projector diodes and are capable of doing between 1.5 watts to over 2 watts. But, the one you first described sounds like the common Gatling laser which I would never recommend. They are very cheap and have little heat sinking. I have seen decent hosts with these diodes selling for ~$75.00, give or take.

Yes, I have seen these small pen lasers in 450nm before. They use a single mode diode which is quite low power. The diodes are more expensive than the red ones or the DPSS green laser that are available as 301 and 303 style.
 

paul1598419

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I don't know anything about that particular seller, but that looks like the Thor host which is better than the Gatling. I am skeptical about the 1 watt output power as the diodes used for 445nm are capable of much more power. I can't say which 450nm diode they may be using, so I would ask them questions before pulling the trigger on that one.
 

Encap

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paul1598419

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From those eBay links it looks like some sellers use 445nm and 450nm interchangeably. I have a Thor H2 that I got awhile ago to review which uses two 26650 batteries. It is a larger Thor than the M2. These use 445nm diodes.
 




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