Old 08-06-2010, 04:30 PM #1
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Post Completed

Found one!

Thank you guys!



Last edited by Spartan X; 08-10-2010 at 02:11 PM. Reason: Found what I was looking for
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Old 08-06-2010, 04:58 PM #2
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Default Re: WTB: Dragan Lasers Beam Expander

I have a Melles Griot 10X beam expander (C mount), but I don't know if it can fit on your laser.
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Old 08-06-2010, 11:00 PM #3
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Default Re: WTB: Dragan Lasers Beam Expander

I'm not sure I could afford the Melles Griot 10x any way, those are worth a little more, heh.
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Old 08-06-2010, 11:06 PM #4
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Default Re: WTB: Dragan Lasers Beam Expander

Quote:
Originally Posted by Spartan X View Post
I'm not sure I could afford the Melles Griot 10x any way, those are worth a little more, heh.
Optotronic sells for 215 USD...
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Old 08-06-2010, 11:08 PM #5
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Default Re: WTB: Dragan Lasers Beam Expander

edit: nvm il keep it.
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Old 08-10-2010, 03:37 AM #6
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Default Re: WTB: Dragan Lasers Beam Expander

Edit:

I'm checking with DL, one of the first review for the 1W dragon states the front cap on the spartan is not removable like the older spartan models, so I may not be able to use a beam expander. I'll post again when I am sure or have my laser to confirm, which should be anyday now.


From DL:

The lens cap of the 447nm Spartan lasers can be removed albeit with a fair bit of effort. I recommend using something rubber like dish washing gloves that will give you excellent grip when you try removing the lens cap.

The original beam expander is designed for lasers with a beam diameter of less than 2.5mm. It will still work with these lasers but there will be some power loss and a change in beam profile.



Found one for sale, thank you guy!
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Old 08-13-2010, 07:54 AM #7
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Default Re: Completed

Hello
Please tell me what a Beam expander really does. Is the beam thicker and will it keep the shape for long distances?
Thanks for explains !
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Old 08-13-2010, 05:58 PM #8
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Default Re: Completed

Quote:
Originally Posted by Dawinzi View Post
Hello
Please tell me what a Beam expander really does. Is the beam thicker and will it keep the shape for long distances?
Thanks for explains !
As the name say ..... it "expand" the beam from the emission point, giving it a much better divergence for focusing in the long distance .....

There's a phisical limit to how much you can focus good a thin beam of light, so in long distance, starting with an 1mm beam (just as example), you cannot get less than a certain diameter (that depend from the distance and divergence of the beam) ..... but, if you use a beam expander for start with, still as example, a 10mm diameter beam, you can have a much better spot at long distance.

Ofcourse, due to this, beam expanders are useless for short distance pointing, they are needed for long distance pointing only .....
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Old 08-14-2010, 03:08 PM #9
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Default Re: Completed

Thanks HIMNL9 !!!

i think there are other people interested what a Beam expander really does.
Please, it is absolutly not my intention to make surreptitious advertising. Surfing the Web i found at "Laserglow" superb illustrations what Beam expanders exactly are doing.

Peace out there !!!

Now, i go shaking my ass at the STREET PARADE in Zürich.
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