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my 1w blue laser

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CameronDferguson

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I have the fasttech 1w blue laser and i am wandering if there it a way to get the smaller mabe a new lens or something and make it go farther i am newer to lasers and could use some help.I was thinking mabe i could by a laser expander but i dont know what will fit or not fitit would help me alot if tou could help me its the 133$ one
 
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isaacpeh

isaacpeh

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Dragon lasers sells a universal beam expander !

You can get it from ;

: Here for the beam expander
: Here for the universal adapter :)
 
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SB241

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What is the advantage or uses of a beam expander if you already have and adjustable lens?
 
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CameronDferguson

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Its doesn't i thought it did well with the expander dies it keep the beam small and sso it does not spread out alot
 
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CameronDferguson

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Type in spartan laser epander and it will be like the 3 video down it will be 2 laser beams and that is the same expader i want to get the 1 on the left in ths video is like my kaser and j want to get it like the one on the right
 
Pi R Squared

Pi R Squared

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SB241 said:
What is the advantage or uses of a beam expander if you already have and adjustable lens?
Click to expand...

To be more specific, the beam expander improves the divergence. With a normal 3 element or single element lens the beam will expand more rapidly, more so with a single element than a 3 element. With the beam expander the beam starts out larger in diameter but doesn't expand as rapidly, even though there is a power loss from the additional optics, at some distance it will outperform the lens by itself. I remember a long time ago someone here shined a green laser at a hillside multiple miles away and his friends were there to take a photo and measure the diameter of the beam and it was about 10 feet, and there was someone else here that said they shined their laser at a sign on the other side of a lake that I think was a mile accross while their friend measured the beam at about 3 feet I think it was. If these people could have used a beam expander then the beam would have been smaller at those distances. If you take 2 identical lasers one with a beam expander and one without, at some distance the one with the expander will begin to outperform the one without the expander. So most of us probably don't need an expander for anything, but if you want to put a dot on something far enough away then you need the expander.

Alan
 
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SB241

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Pi R Squared said:
To be more specific, the beam expander improves the divergence. With a normal 3 element or single element lens the beam will expand more rapidly, more so with a single element than a 3 element. With the beam expander the beam starts out larger in diameter but doesn't expand as rapidly, even though there is a power loss from the additional optics, at some distance it will outperform the lens by itself. I remember a long time ago someone here shined a green laser at a hillside multiple miles away and his friends were there to take a photo and measure the diameter of the beam and it was about 10 feet, and there was someone else here that said they shined their laser at a sign on the other side of a lake that I think was a mile accross while their friend measured the beam at about 3 feet I think it was. If these people could have used a beam expander then the beam would have been smaller at those distances. If you take 2 identical lasers one with a beam expander and one without, at some distance the one with the expander will begin to outperform the one without the expander. So most of us probably don't need an expander for anything, but if you want to put a dot on something far enough away then you need the expander.

Alan
Click to expand...


That's interesting, I got it now thanks for the explanation Alan. I am thinking about ordering one.
 
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CameronDferguson

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Ok thx for the help and i was wondering about when the light comes out of the expander so it stays like tbat for a much farthefartherdistance
 
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