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Old 03-29-2015, 10:01 PM #1
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Default my 1w blue laser

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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Old 03-30-2015, 10:10 AM #2
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Default Re: my 1w blue laser

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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Old 04-01-2015, 01:06 AM #3
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Default Re: my 1w blue laser

Thx for the help with that adapter it will fit my laser?
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Old 04-01-2015, 01:28 AM #4
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Default Re: my 1w blue laser

With a laser expander do you take off your old kens or leave that on to
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Old 04-01-2015, 01:40 AM #5
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Default Re: my 1w blue laser

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Originally Posted by CameronDferguson View Post
With a laser expander do you take off your old kens or leave that on to

You would leave the existing lens on.
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Old 04-01-2015, 12:43 PM #6
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Default Re: my 1w blue laser

What is the advantage or uses of a beam expander if you already have and adjustable lens?
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Old 04-01-2015, 10:08 PM #7
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Default Re: my 1w blue laser

So i can get a round beam and not a rectanglar one and so it will go a lot farther
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Old 04-01-2015, 10:26 PM #8
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Default Re: my 1w blue laser

A beam expander does not make a
rectangular beam "round".
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Old 04-02-2015, 12:32 AM #9
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Default Re: my 1w blue laser

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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Old 04-02-2015, 12:39 AM #10
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Default Re: my 1w blue laser

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
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Old 04-02-2015, 12:42 AM #11
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Default Re: my 1w blue laser

Quote:
Originally Posted by SB241 View Post
What is the advantage or uses of a beam expander if you already have and adjustable lens?
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.

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Old 04-02-2015, 12:53 AM #12
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Default Re: my 1w blue laser

i think that mine is even worse then the one on the left
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Old 04-02-2015, 12:56 AM #13
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Default Re: my 1w blue laser

Quote:
Originally Posted by Pi R Squared View Post
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

That's interesting, I got it now thanks for the explanation Alan. I am thinking about ordering one.
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Old 04-02-2015, 01:18 AM #14
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Default Re: my 1w blue laser

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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Old 04-02-2015, 01:20 AM #15
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Default Re: my 1w blue laser

Me to
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Old 04-02-2015, 01:21 AM #16
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Default Re: my 1w blue laser

But with my laser the lens moves a little so it it possible to take it of and put the expander on instead
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