光学元件标识升级公告
设计波长：266 nm-1550 nm可选
相位延迟量δ =（2m+1）π/2，m为正整数
常用于将线偏振光转变为圆偏振光
相位延迟量δ =（2m+1）π，m为正整数
常用于旋转线偏振光的偏振方向
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