设计了一种三元结构的双折射型退偏器,将两个这样的退偏器组合使用(两退偏器光轴成45°)对单色线偏光进行退偏,无论是用洛匈棱镜和红外感光卡对退偏效果进行观察,还是用偏振分析仪对退偏光束进行偏振分析,所得的结果表明退偏效果很好,且退偏效果对入射线偏光的偏振方向不敏感.

A new kind of depolarizer consisting of three parts(one is canted quartz crystal and the other two are canted fused quartz glasses) is designed.Two such depolarizers are used together(the principal axis of the second are at 45° to that of the first one) to depolarize the incident linear-polarized light.The depolarizing result is observed not only by birefringent prism and an infra-sensitive card but also a polar analyst,and in both ways results of good depolarized light are observed.And the depolarizing result is insensitive to polarizing direction of the incident light.