Calcite/barium fluoride ultraviolet polarizing prism.
A calcite/barium fluoride polarizing prism gives improved ultraviolet transmittance compared with a calcite/calcite ultraviolet polarizing prism. Beam spatial distortion is transmitted because of variations in absorption (and path length) in the calcite half of the calcite/barium fluoride prism.
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Wu
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Li
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Huang
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Yu