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

LPF Donation via Stripe | LPF Donation - Other Methods

Links below open in new window

ArcticMyst Security by Avery

1W 638 or 2.5W 450??? Need Advice!

Which wavelength should I go with? I have neither as of yet.

  • 638nm at 1W

    Votes: 12 75.0%
  • 450nm at 2.5W

    Votes: 4 25.0%

  • Total voters
    16

honeyx

0
Joined
Jun 12, 2011
Messages
377
Points
28
Correct me if I am wrong, but you may not want to use an acrylic lens with a 1W 638nm, at least not for very long. :D
As long they are focused to infinity there is no risk but when focusing to a pinpoint you will get the housing melted.

So for static focused builds there you can also use acrylic as well but I also prefer glas lenses because they can be cleaned easier and do not get scratched that easy.
 





Joined
Oct 26, 2007
Messages
5,438
Points
83
Correct me if I am wrong, but you may not want to use an acrylic lens with a 1W 638nm, at least not for very long. :D

I wonder about that though... there are some AR-coated acrylic lenses that might be pretty good. The lenses were never AR-coated for blue and violet, and the absorption by the acrylic itself, which starts becoming opaque around violet, might cause problems. Still, the beam of that red diverges so quickly that it might start melting the plastic.
 
Joined
Oct 14, 2012
Messages
6,086
Points
113
You're probably right about the higher quality acrylic lenses being available.
I guess my response was based on my personal preference for a glass lens.
I think if I were to want to improve, or correct the Mits. beam, I would look at other options first, rather than take a chance with the plastic.
I also like to keep focusability as an option, even if it's focused to infinity 90% of the time. :D
 




Top