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

Which lens for Survival Laser?

AMN

0
Joined
Mar 20, 2011
Messages
176
Points
0
I bought a Survival Laser bundle from Garoq, and there is a side-splash that quite a few 445nm lenses do have I believe.
I'm looking for a lens that will output a more uniformed dot with little to no splash.
I don't want a lens that will increase the power a lot but won't help in my issue, nor a lens which will decrease the power significantly.
I'm not sure what lens it came with but I remember reading 'AR coated glass lens'

I hope I'm not sending the wrong message here, the Survival Laser is a fantastic buy, it's a great laser and I strongly recommend it. It's just that I would really like an almost perfect dot.

:thanks: for reading! :yh:
 
Last edited:





If the Survival Laser has the 3-element AR coated Aixiz (or equivalent) glass lens,
then that's about the best you can have.
For a "perfect" dot you'd need either a pair of prisms or a cylindrical lens.
Not very handheld-compatible...

These diodes just have a nasty beam profile, is all.
 
Even with a prism pair, you're not going to get a perfect dot, just more of a square output instead of rectangular. You simply won't get a circular dot from a multi-mode diode that isn't creating a circular beam.

Anselm is pretty much bang on. If you want this to still be a portable laser, 3-element AR coated Aixiz is the closest you'll get to a proper "dot".
 
Having said that, if you're seeing "splash" and not just "rectangular shape", your lens might just be dirty.
 
Having said that, if you're seeing "splash" and not just "rectangular shape", your lens might just be dirty.

The case is not the dot, I know that is rectangular and I'm fine with that.
It is indeed the splash, and it's definitely not the lens because it's not just my unit, I think this kind of side splash is common with 445nm lasers.
I guess I'll just get used to it.
Thanks for your help!
 
Last edited:
All The New 3 element glass lenses that i have gotten have these side splash "wings". The old Ones did not have them as bad but they were there.

Not sure what causes this.
 
All The New 3 element glass lenses that i have gotten have these side splash "wings". The old Ones did not have them as bad but they were there.

Not sure what causes this.

Yeah, that's exactly what I have with my Survival Laser!
Oh well, it's not even a major issue.
 
All The New 3 element glass lenses that i have gotten have these side splash "wings". The old Ones did not have them as bad but they were there.

Not sure what causes this.

I think it might have something to do with the new coatings that are supposedly tailored for 445nm. They do seem to pass a few more mW than the old versions.
 
garoq love your laser burns everything not reflective thank you thank you you really helped me into a new very cool hobby. I've built 3 lasers since putting yours together you rule lpf rules thank you lpf never could have done it without you
 
garoq love your laser burns everything not reflective thank you thank you you really helped me into a new very cool hobby. I've built 3 lasers since putting yours together you rule lpf rules thank you lpf never could have done it without you

Hey thanks Yamaha, yes this is a great hobby and LPF is a fantastic resource! :D
 


Back
Top