Old 01-31-2010, 02:35 AM #1
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Default Is there a way to focus the Opto laser pointer?

For those of you who aren't already sick about my 423408 other topics on the subject of the Opto (but this is a more general sort of question)

Short of holding some sort of convex lens infront of everything I would potentially want to point at, is there some way to make the beam...thinner? Ie just sort of focus it more, an attachment at the end of it?

Because then it would be pretty much perfect

The laser in question is the Opto150, what can I add to it to make the beam thinner and focus it more to make it have more effectively powerful*

*note I said effectively, obviously I know it won't make it more powerful as such, but it focusedserwerfsfdsdfsdfsf...you know what I mean.


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Old 01-31-2010, 02:50 AM #2
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Default Re: Is there a way to focus the Opto laser pointer?

You need to buy or build a beam expander. There are many posts here about them and they are like a simple telescope in construction.

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Old 01-31-2010, 02:52 AM #3
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Default Re: Is there a way to focus the Opto laser pointer?

Forgive me, I'm obviously missing something, but wouldn't beam expander...expand the beam?

Which is sort of the opposite of what I think I want to do MAJOR :S
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Old 01-31-2010, 02:53 AM #4
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Default Re: Is there a way to focus the Opto laser pointer?

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Originally Posted by Hemlock_Mike View Post
You need to buy or build a beam expander. There are many posts here about them and they are like a simple telescope in construction.

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Old 01-31-2010, 03:03 AM #5
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Default Re: Is there a way to focus the Opto laser pointer?

Right okay I understand now

to be honest the expander is more expensive than the laser itself, utterly ridiculous.

I won't be buying...

Which leaves me more conflicted than ever as to my choice of laser.
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Old 01-31-2010, 03:04 AM #6
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Default Re: Is there a way to focus the Opto laser pointer?

you can build them for relatively cheap.

Search is your friend i found these in less than 15 seconds :P they have a kit for $45 unless thats too much i suggest that one

http://laserpointerforums.com/f44/be...rth-41273.html
http://laserpointerforums.com/f49/di...oad-44985.html
http://laserpointerforums.com/f49/di...der-42814.html
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Last edited by KiLLrB; 01-31-2010 at 03:07 AM.
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Old 01-31-2010, 03:28 AM #7
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Default Re: Is there a way to focus the Opto laser pointer?

Thanks! I'll look into it.
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Old 01-31-2010, 03:30 AM #8
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Default Re: Is there a way to focus the Opto laser pointer?

An expander does expand the beam then focuses it down at a specific distance like a telescope or camera lens system. I have built many of them and all you need is a diverging lens and a converging lens.
Try building one for 10,600 nM with ZnSe lenses !!!!

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