Bireflectance film based on the photoelastic effect is a kind of anisotropic high reflection coating.
弹光效应双反射膜是一种各向异性的高反射膜。
However, the force will be formed fiber photoelastic effect, leading to refractive index changes, so in theory, optical fiber performance is not constant.
但由于光纤受力后会产生光弹性效应，导致折射率变化，所以理论上光纤性能也不是恒定不变的。
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