Welcome to Laser Pointer Forums - discuss green laser pointers, blue laser pointers, and all types of lasers

Buy Site Supporter Role (remove some ads) | LPF Donations

Links below open in new window

FrozenGate by Avery

Possible Dangers of Blue and Violet Lasers?






Moto154 said:
I have never gotten a clear answer to my question: do 405nm and/or 445nm laser diodes emit ultraviolet light? I assume many 405nm and 445nm laser diodes are multimode, meaning more than one wavelength of light is produced. (UVA begins at 400nm.) Do these diodes produce UV light? Are these diodes harmful to us (our skin) or are they completely safe? I know UVA is not extremely dangerous compared to UVB, but still, what are the risks? Thanks
Click to expand...

No, they don't emit UV light.

Multimode doesn't mean they are lasing at multiple wavelengths (Although, there will be a couple of wavelengths some fraction of a nanometer apart).

Not sure where you got the idea that they'd emit UV.

All of the diodes we use emit the wavelength they say they do and no appreciable amount of any other wavelength.
 
Last edited:
I am sure there are threads with the same answering another, making comments agreeing or disagreeing.... I've seen some appear legit by asking about buying something from a member, as if legit, then backing out saying they bought from some other source to cover their tracks. I've almost had enough of it, about ready to take a long nap fellows.
 
diachi said:
I think I have some of that lying in a box somewhere! Maybe I'll make my own laser diode! :whistle:
Click to expand...
I think what you're thinking about is steel wool. :crackup::undecided:
That stuff works a trick for coherent beams! :eg:

On another note I think it's probably the same dude from the banana peels thread. :(
 
Seems we are having a lot of posts lately about how dangerous lasers are, whether unfocused IR, blue or violet wavelength etc... Even a 5 mw laser pointer can harm your vision if you stare at it long enough without blinking, nothing new. Seems more like trolling to me than serious questions, to ask that question you probably already know blue and UV have their own unique hazards though, due to the wavelength. Asking if whether a 405nm laser pointer produces UV after just having stated they knew UV starts at 400nm and shorter seems a give away it is a troll right there.
 
Moto154 said:
I have never gotten a clear answer to my question: do 405nm and/or 445nm laser diodes emit ultraviolet light? I assume many 405nm and 445nm laser diodes are multimode, meaning more than one wavelength of light is produced. (UVA begins at 400nm.) Do these diodes produce UV light? Are these diodes harmful to us (our skin) or are they completely safe? I know UVA is not extremely dangerous compared to UVB, but still, what are the risks? Thanks
Click to expand...

Tanning with a 405nm laser will give you spotty results and take forever. I suggest you tan after the Gym but before you do the laundry. And do not use a laser during any of this.
 
I'm waiting for a sock attack if this guy gets miffed, but right now I think he is building reps in preparation for it. CrazLaser, forgive me, but so far I have thought you might actually be one of this guys puppets, I mean, if he is going to choose a persona here, a high school student etc. is perfect, easier to feel for them if they are not treated right. It's just the name you choose, too close to CrazyJay, there are other new members here who also make me wonder, Jhop, might also be completely innocent of such but "J" hop reminds me of Crazy Jay hoping around with different member names. OK, I said it, I won't reference that again with you two guys, but anymore I don't take anything for granted in forums, not until I have seen more verified interactions. It is sad a guy has so much time on his hands to play games, that his world revolves around righting the wrong he believes happened to him in the forum, but I understand, if you don't have a life outside of the internet, that is where you go, whether positive or negative interactions, it is still some kind of interaction with people.

I too have put too much time into hanging around this forum, should probably cool it and concentrate on real life more.
 
Really, the only dangers you'll find associated with visible light is near the 400nm portion of it, and even then, if you exercise proper caution 405nm lasers are perfectly safe. You won't get sunburned by having a 405nm laser hit your skin for an instant!

Anything below 350nm is where you should start to get paranoid if the beam hits you. :)

-Alex
 
Last edited:
  • Like
Reactions: GSS
Hi,
I agree blue and violet lasers are dangerous only because they are addicting and i just want to build more of them. I need dis .....

Rich:)
 

Attachments

  • IMG_2195.JPG
    IMG_2195.JPG
    174.9 KB · Views: 42
Moto154, I think you should do a little "about me" intro. Member's seem to be 50-50 on to your true identity, plus not sure because your not replying, could be your weary because of the reply's to this thread and would hate to see your truly trying to learn;)
 
You must log in or register to reply here.





Back
Top