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Old 09-08-2007, 07:35 AM #1
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Default What is this?

Hi
What is this?
It sounds interesting, but i'm not sure how you would use it.
http://cgi.ebay.com/LASER-LENS-MOTOR...QQcmdZViewItem
Thanks


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Old 09-08-2007, 08:59 AM #2
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Default Re: What is this?

THAT looks pretty cool ! It would fit perfectly on my workbench, I am certina...you gonna buy it for me ? LOL !!!
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Old 09-08-2007, 09:16 AM #3
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Default Re: What is this?

It does look like something I really need

*must resist, must resist*
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Old 09-08-2007, 02:15 PM #4
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Default Re: What is this?

OOOOOoooo!
Yeah, I think I've seen a video where one of these was used. They expanded the beam so it was a few inches wide at a few hundred feet and then used a large double convex lens to focus the beam and light a match! I think it was 260ft away or so. Something that would be very interesting if you have money to spare.
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Old 09-08-2007, 04:09 PM #5
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Default Re: What is this?

That seller keeps changing the deal. Now the shipping fee is $30? Anyway, he's been listing them on eBay for months now. I tried picking one up before, but the seller was a total pain in the butt and I wasn't able to get my hands on one. How exactly it works? I have no clue.

The general idea behind a beam expander is just diverging the beam and then recollimating it so that your beam diameter is larger, but your divergence is smaller. How that system, in particular, works... Well, you'll have to buy SenKat and I some to play with and find out!
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