锗是常用的红外光学材料。
蓝宝石单晶因其优良的综合性能而成为最重要的中红外光学材料之一，在军民两用中都具有广泛的应用前景。
Sapphire single crystal is one of the most important mid-infrared optical materials due to its excellent overall performance in both military and civil applications.
蓝宝石单晶因其优良的综合性能而成为最重要的中红外光学材料之一，在军民两用中都具有广泛的应用前景。
Sapphire single crystal is one of the most important mid-infrared optical materials due to its excellent overall performance in both military and civil applications.
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