The first liquid crystal material has birefraction index approximately equal to one half of that of the second liquid crystal material.
，
一液晶材料层的双折
率约略等于二液晶材料层的双折率的一半。
The first liquid crystal material has birefraction index approximately equal to one half of that of the second liquid crystal material.
，一液晶材料层的双折率约略等于二液晶材料层的双折率的一半。
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