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520 nm vs 532 nm laser who is better ?

Lifetime17

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By the way, why so many cigs in ur Ainus?
Hi Alaskan,
I was wondering thee same thing cough cough !!

Rich:)
 



Ainus

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I found this photo tf2 meme and I think this is best profile pic was ever created
 

Lifetime17

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Hi Ainus,
Don't take it to heart your not the only one that we crack on really. You should see some other posts of others, yours is really lenient .
Glad to have you as member , you have to admit it was funny though doesn't hurt to laugh. You'll get your chance to crack on someone too.
Rich:)
 

Alaskan

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I've had that question for a long time, ever since he first joined. My first member name here was Wadsworth, from a reason I don't understand, maybe just the first questions I had about high power IR, that was thought to be a troll right from the start when it was just the name of a city I was living in and my questions although naive, were sincere.
 

Ainus

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Dot size in 15km = 30m

Dot size in 25km = 50m
I think its visible enough
 

Alaskan

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The divergence of a 700-1000 mw green laser diode using a 6 mm lens is approximately 2.6 mRad, that will spread fast, using the figures I choose shows about almost 40 meter diameter beam after 15km, but the calculator I used does not take into account both the fast and slow axis, there are actually two different divergence figures due to this.

Put a 10X beam expander on the laser and you can divide these numbers by ten, but it really doesn't matter what the figures are, if it does what you want. I am not completely sure what the divergence will be for the lens you choose, this is based on a G2 lens which does not have a long focal length and thus greater divergence than some lenses.
 
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Lifetime17

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Hi,
Maybe a 3X Sanwu BE would be sufficient ?? With a 9mm x 0.5 adapter ??
Rich:)
 

Alaskan

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I view the Sanwu BE as sufficient myself, then the divergence in comparison to a DPSS pointer is very good.
 

kecked

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Make a spatial filter. That will make the beam a gauss round beam. ThAt same filter can also be the expander.

If this is a communication link their are better ways to do this.
 




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