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What Does a Fresnal Lens Do?
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07-30-2007, 03:50 AM
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Sea Monkey
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Join Date: Jul 2006
Location: St. Petersburg, FL
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RE: What Does a Fresnal Lens Do?
If we're talking about the same kind of Fresnel lens, it was used on lighthouses to concentrate the beam. They are actually made up of thousands of individual pieces of glass.
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