The crystal layer on early LEDs was gallium arsenide or gallium phosphide, which lent that reddish color.

早期LED的液晶层是砷化镓或者磷化镓做的，所以发出红光。

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A simple method using spectroscopic ellipsometry to measure uniaxial liquid crystal layer is introduced.

探讨了利用普通光谱型椭偏仪对各向异性液晶层进行综合性测量的可行性。

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Experiment results show that removing the surface broken crystal layer of the cold drawn rod can prevent heat treatment induced cracks.

实验结果表明，热处理前去掉冷拉棒表面的碎晶层可以防止它在热处理过程中产生裂纹。

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This negative is illuminated from the front by an arc lamp, and the light from this lamp passes through the transparent regions of the liquid-crystal layer to the middle layer.

ECONOMIST: Curtains for celluloid

Applying an electric charge to the liquid crystals causes the molecules they are made up of to realign themselves, altering the transparency of that layer. (The screens of portable computers work in a similar way.) The result is that a high-resolution negative copy of the moving image is formed in the liquid-crystal layer.

ECONOMIST: Curtains for celluloid

Dr Bard and his colleagues have developed a novel form of memory that consists of a thin layer of organic liquid crystal sandwiched between two sheets of glass.

ECONOMIST: Just press print