Old 07-17-2010, 12:11 AM #1
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Default Beam Expander for large expansion

I am interested in using high-powered laser pointers to simulate a similar experience as in the application linked here: The Laser Image Projector (2007-2008) - a set on Flickr

However, the apparatus is rather immobile and bulky. I am wondering if there is a focusable green laser that exists that could have a rapidly expanding spotlight beam. if not, are there cheap lenses that can accomplish the same effect?


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Old 07-20-2010, 01:26 AM #2
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Default Re: Beam Expander for large expansion

Two negative focal length lenses should do it.
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Old 07-20-2010, 11:47 AM #3
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Default Re: Beam Expander for large expansion

^ Yes, that should work.
Just in case that is a suitcase nuke, don't cut the "red" wire.
Nice pics BTW!
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Last edited by millirad; 07-20-2010 at 12:07 PM.
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