| 摘要 |
A method of manufacturing calcium fluoride single crystal includes cooling the calcium fluoride single crystal with variable cooling rates so that throughout a temperature range in the cooling step, maximum shear stress inside the calcium fluoride single crystal caused by thermal stress is approximately equal to or smaller than critical resolved shear stress (τc) of the calcium fluoride single crystal in a <1 1 0> direction on a {0 0 1} plane of the calcium fluoride single crystal, and is maintained to be an approximately constant ratio, and adding strontium fluoride when growing the single crystal before the cooling step.
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