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Old 08-03-2010, 11:55 PM #1
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Default Giant lenses.

SO... I came across some huge *ss lenses. 3.5" across. 3 acrylic aspheric ones, 3 glass double-convex ones, 3 acrylic convex ones. The acrylics are coated for red, green, and blue.



So what do i do? I'm thinking MEGA beam expanders. 4" PVC will work perfect. At the divergances these will get I could make a visible beam across lake erie!

I also have a 4' acrylic lens. Death ray maybe?



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Old 08-04-2010, 12:50 AM #2
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Default Re: Giant lenses.

As long as you have 2 convex lenses with two different focal lengths, and can make an expander with them.
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Old 08-04-2010, 12:52 AM #3
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Default Re: Giant lenses.

I have some small concave lenses I was planning on using.
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Old 08-13-2010, 10:47 PM #4
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Default Re: Giant lenses.

There is a huge front surface mirror in those TVs too.

Let us know if your beam expander works.
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Old 08-13-2010, 11:03 PM #5
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Default Re: Giant lenses.

I know, it's massive; but I have no way to cut up a big piece of glass like that. Otherwise I'd be selling 1" first surface mirrors!
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Old 08-14-2010, 12:29 AM #6
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Default Re: Giant lenses.

These came from a projection tv?
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Old 08-14-2010, 12:43 AM #7
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Default Re: Giant lenses.

Yes.

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