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Author: Subject: Growing fluorite crystal for lenses takes a YEAR ??
metalresearcher
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[*] posted on 22-11-2011 at 10:07
Growing fluorite crystal for lenses takes a YEAR ??

In this article http://www.the-digital-picture.com/Reviews/Canon-EF-1200mm-f... which is a review of a very rare Canon 1200mm telephoto lens. The reason I post this is that the article tells about 'the fluorite elements aingle crystals have to grow for one year'. The lens elements are max. 20cm in diameter. I know about the Czochralski process to grow ultrapure Si single crystals of the same diameter (20cm or more and 1-2 meters long) , so CaF2 can be grown the same way with this process or am I wrong ?
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woelen
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27-11-2011 at 23:59

 Sciencemadness Discussion Board » Fundamentals » Chemistry in General » Growing fluorite crystal for lenses takes a YEAR ??   Go To Top