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

Got my leadlight 150mw BR from andy today

I

iohutom

0
Joined
Nov 27, 2007
Messages
82
Points
0
So happy! Stings me even unfocused :D
A whole new color to me, had it in my hand all the day.
only problem is I can't make it to the right focus... I can only focus based on a very short distance, my eyes are simply not working for long distance focusing, I know there is a lot due to air scatter because of the wavelength, but still I think I should get a fairly round dot rather than a fuzzy patch of violet light :-/
 





It is possible that either the diode didn't get pressed into the module far enough or that something is preventing the lens from screwing in far enough.

However, before I looked at those possibilities, I would have someone else either stand by the dot while you focus the laser or focus the laser for you while you stand by the dot. Seeing the 405nm light at a distance can be really challenging.

Another possibility is that the lens is dirty or damaged.

Peace,
dave
 
what i do is put shine the laser into a mirror and back to the wall next to you. you can fine tune them a lot better like this.

also i wear some sunglasses and it seems to help me see the center of the dot s lot easier with a little bit of the uv filtered out.
 
i use my 532 od-5 goggles to focus my builds works great takes out all the spill
 
as above

the laser is fine, or should i say the dot.

shine the laser into a mirror and bounce it back right next to you and the dot wont be fuzzy
 
nvm, I won't use it for long distance pointing anyway. I just fried a few bugs with it.
 
your missing the point!

if you do the mirror thing you will be able to see the size of the dot.
 
Yea, long distance pointing isn't for a bluray.Thats how they all are, human eyes cannot see that wavelength properly, it just focuses differently than longer wavelengths.You will be able to see it clearly in a completly dark room(i think) because your eyes won't have long wavelengths to focus for and will be able to concentrate and adjust focus for 405nm.

And about the focusing itself, my br is perfectly collimated when the lens is screwed all the way in. :-/
 
Lucky for you Switch! Non of my DIY lasers do that, I always need to refocus them after putting them in my pocket or just after shaking them. :(
 
iohutom said:
Lucky for you Switch! Non of my DIY lasers do that, I always need to refocus them after putting them in my pocket [highlight]or just after shaking them. [/highlight]:(
Click to expand...


Carefully unscrew the lens. There should be a spring under there that helps hold the lens "square" and in place. It sounds like either yours is missing or it is too short.

Peace,
dave
 
those springs never work right though, the lens always wiggles.

Back on topic, the eye can see violet a bit, but not like Switch says. The focus distance is further away. When you shine it at the table or near you, you can see it's further away than other light reflecting from the same surface. When you shine it across the room, then for your eyes to focus on it properly, they would have to focus beyond infinity (actually at a negative distance). Because this is not possible, beyond a certain distance (4ft in my case), you see a cotton-ball-shaped blob of purple (may be differently shaped if your corena has different abberations)
 
Wow, got my Zoom-B kit just now, amazingly fast shipping! Another sleepless night!
 
Hi zoom-B

What is the metal wire doing there?
 

Attachments

  • 1_016.jpg
    1_016.jpg
    478.9 KB · Views: 76
Zom-B said:
those springs never work right though, the lens always wiggles.

Back on topic, the eye can see violet a bit, but not like Switch says. The focus distance is further away. When you shine it at the table or near you, you can see it's further away than other light reflecting from the same surface. When you shine it across the room, then for your eyes to focus on it properly, they would have to focus beyond infinity (actually at a negative distance). Because this is not possible, beyond a certain distance (4ft in my case), you see a cotton-ball-shaped blob of purple (may be differently shaped if your corena has different abberations)
Click to expand...

Yea that seems to be accurate.I can perfectly focus on it up close, as long as everything else is blurry.But no matter how hard I unfocus my eyes I can't get it to a perfect focus beyond a given distance.I can however make it look less blurry, but not perfect.In about 700-1000m away on a white surface in the night , it's so blurry I can't even see it until I unfocus my eyes. :-/

Anyway, I have an aperture cap over the aixiz module, so it doesn't lose its focus in my pocket.I have to unscrew it to refocus.But I do find it convenient that it's ideally collimated when fully screwed in. :D
Btw, I don't have a screw either, and can't figure out how to remove the black plastic to make the little hole larger. :(
 
You must log in or register to reply here.





Back
Top