DIY "cheap" blue 20mw ?

[Raytracer]

Hello.

The beam combination of 405nm/20mw and 532nm/1mw would result in a 460nm/~21mw laser beam.

The needed componants (bought separately) wouldn't cost more than a 20mw blue laser, no ?

Ray.

 

[shikari_rock]

They would appear blue, but then the 405nm would fluorence and then it would result in diffrent color beam and dot, which would be very strange, and BTW a 20mW NUV laser costs way more than a true blue.

 

[Benm]

a 20mW NUV laser costs way more than a true blue.

I would have to disagree on that... since its just a bluray laser diode that can be purchased for 10s of dollars. Perhaps it'd be a little short of 20 mW (10-15 or so), but otherwise no problem.

On the other hand, i doubt the mixed beam would look convincingly blue, and combining the beams using dichro's and all will be a pain in itself.

 

[a_pyro_is]

But by all means, try it! Let us know how it works, how it looks, how hard it was to align...And of course, LOTS of pics.

 

[spyrorocks]

Yeah, this could be interesting

 

[Cyparagon]

I don't know if it works that way. By the same calculations I could theoretically come up with some ratio of blue to red and come up with green.

 

[Raytracer]

This is an example of beam combination.

Sorry I can't post links yet, just cut and paste :
home.nordnet.fr/lhenninot/laser/insidelaser005-mini.jpg

Cube beam splitters are not that expensive, I'll try when my bluray LD is OK

Ray.

 

[SenKat]

THAT is a nice pic

 

[Raytracer]

THAT is a nice pic

I agree, but unfortunately it would be hard to make a pointer of it :'(

 

[a_pyro_is]

Ray, you just UnFixed SenKat's Fix.
And yes, nice fix! Me like pretty colors.