Pike偏振片-Polarizer •外部尺寸:2×3英寸•角度精度:-常规手动调节:5°-精密手动调节:2°-计算机控制调节:+/-0.5°•材质:ZnSe, KRS-5, Ge, CaF2, Glass, BaF2, Polypropylene•有效光径:20mm