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Busted Grism Substrate. One of the JHK grisms supplied to the grating company did not survive the process of heating and cooling needed to apply the transmission grating to the CaF2 substrate. The results are pretty interesting... |
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As seen from grating face (hypotenuse) |
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Backside view (hypotenuse face down - viewing backside of grating) |
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Simlar, through other surface |