Old 09-17-2007, 06:29 AM #1
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Default Cheap Laser Beam Expander/Collimator?

I want an inexpensive beam expander/collimator, something like 10x.

My 20 year old binoculars can even do 3x, so I was thinking of using a refracting telescope instead.

A laser beam expander is based on an Galilean telescope so it should be fairly simple. I've tried the one from Information Unlimited(Amazing1) and it was difficult to use and was poor in performance. This picture is pretty definitive of the optics of an expander:



Because of the monochromatic nature of a laser even a singlet used in this system might work.

Anyone have any experiance with a beam expander or ideas on it? I don't think I'll get as lucky as that guy who won the Carl Zeiss unit seen in that You-tube video with the 1.7W green

Thanks, Kwiz


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Old 09-19-2007, 09:18 AM #2
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Default Re: Cheap Laser Beam Expander/Collimator?

Just one more thing to add. I looked at Astronomy magazine today(checking out refractors) and the back section is filled with ads for green laser pointers. If I remember correctly Wicked has at least a half-page ad but there were many other sellers I've never heard of.

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