13 November 2014 How to break a lens
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Over the years, the author has familiarized himself with far too many of the classic methods for turning a single optical element into any number of smaller pieces. In the vast majority of these cases the application of gravity was the destructive element. Resting a large lens on a yet unbeveled edge to produce the classic “clamshell” is a well known example. Another ever popular technique using gravity assist is trying to carefully pull one’s fingers out from under an optical element when placing it on a surface plate.
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Alan E. DeCew, Alan E. DeCew, } "How to break a lens", Proc. SPIE 9197, An Optical Believe It or Not: Key Lessons Learned III, 91970H (13 November 2014); doi: 10.1117/12.2065081; https://doi.org/10.1117/12.2065081

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