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

Is this normal ?






Joined
Sep 24, 2010
Messages
1,364
Points
0
can't be lol haha impossible

If your laser goes from 3mm to 15mm 25 yards then you have a VERRRY VERRY good laser ! talking about divergence :)
 
Last edited:
Joined
Sep 24, 2010
Messages
1,364
Points
0
Nothing wrong with that it's infact SUPER SUPER good !!
Make a video with your phone or watever from the output and walk 25 yards away to the hit point and show us :O
 
Last edited:
Joined
Jul 2, 2011
Messages
1,011
Points
63
Nothing wrong with that it's infact SUPER SUPER good !!
Make a video with your phone or watever from the output and walk 25 yards away to the hit point and show us :O

My phone cannot pick up laser beam although it is quite bright, I will try with a camera maybe later. Also I only have a tape measure to 25ft
 
Last edited:
Joined
Sep 24, 2010
Messages
1,364
Points
0
50 feet or 25 or yards what is it now ? you can take 10 big steps right and im sure your phone will pickup the dot :) but i never seen a green laser doing .8 mRad to be honest
 
Joined
Mar 27, 2011
Messages
14,125
Points
113
Uhm... Something is definitely wrong with the measurements. First it's 24 yards, then 50 feet, but the dot size remains the same despite a 25' change in distance...

Time to measure again. With glasses, carefully, and at multiple distances. Do 10 feet, 25 feet, 50 feet and 75 feet.

You should see should the same exact number each time when it comes to divergence but certainly NOT when it comes to the dot size.

200mw green beam goes from 3mm to 15mm 25 yards away. It is focused on infinity.

Why ? 3mm from .5ft and 15mm at 50ft ? Calculates to 0.7953549583mRad whats wrong with that?
 
Joined
Jul 2, 2011
Messages
1,011
Points
63
Sorry I am terrible at measuring by eye I did a test at 10ft (using tape measure) the beam started at 1mm from 1inch to 5mm at 8ft 1.3mRad ;) I was confused before about the measurment before that is why it went from 25yards to 50ft I thought it was farther than it actually was :) Sorry for wasting your time :D
 
Joined
Sep 24, 2010
Messages
1,364
Points
0
yeah and that is why i did not belive you straight on :) only gas lasers or single mode diodes do less then 1 mRad ( most cases ) not talking about DPSS lab lasers starting @ 500 dollars
 




Top