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Originally Posted by Turtle
indeed. so the old question remains, does a 'magnifying' lens, of any material whatsoever, bend any range of UV radiation whatsoever, to a focus as they do visible light?
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Yes. But, the focal point might not be the same as for visible light. Quarts is recomended for imaging UV:
Lenses for industrial applications-standard and custom lens design from Universe Kogaku
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This chart shows the typical transmission of the Universe family of quartz lenses. Though they are optimized for 266nm you can see the wide range of transmission. Be advised that the lenses are NOT corrected for constant focus throughout this range. Re-focus will be required at different wavelengths.
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I wonder what a good sized quartz lens would cost. You might be better off with a parabolic mirror, which I think Infinitenow's links use.
~modest
