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1. 发明专利

JPH04172305A POLARIZER ELEMENT 失效
公开(公告)号：JPH04172305A
公开(公告)日：1992-06-19
申请号：JP29918190
申请日：1990-11-05
申请人： SEIKO EPSON CORP
发明人： UCHIYAMA SHOICHI , ITO YOSHITAKA , JINJIEIUU , SONEHARA TOMIO
IPC分类号： G02B5/30 , G02F1/13
摘要： PURPOSE:To convert the incident light having the random polarized light component to the outgoing light having only the polarized light component in one direction free from loss by preparing the cyclic structure by using an isotropic material and a birefringent material so that the condition that the pitch of the repetitive unit is smaller than the wave length of the light wave is satisfied. CONSTITUTION:A polarizer element is constituted of a cyclic structure consisting of the mutual repetition of isotropic layers 101 and birefringence material layers 102. When the thickness of one material 101 is t1, the thickness of the other is t2, and the wave length of incident light is lambda, the following relationship is satisfied; t1 + t2 lambda. The other material possesses the birefringence performance. Further, the optical axis of the material 102 having birefringence performance is preferably oriented in 45 deg. for the direction of repetition of the cyclic structures. Accordingly, the compact polarizer element which is essentially free from light absorption can be obtained at a low cost.

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