Preparation of Birefringent Plastic Optical Material

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Abstract
A preparation method for birefringent plastic bulk material is presented. A plastic such as poly(α-methylstyrene) takes a birefringent orientation when a high dc electric field is applied to its molten phase. This phenomenon is maintained even in a solid phase after decreasing the temperature and hence the birefringent plastic material is formed. It is noticeable that the magnitude of birefringence in the bulk plastic prepared here is controllable.

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