90° Phase Retarder for 10.6um CO2 Laser 反射後線偏振光與圓偏振光互換 Ravg >98.5% Phase Retardation: λ/4 Model Size 90RSI10-3 Ø25.4 x T3mm 90RSI15-4 Ø38.1 x T4mm 90RSI20-5 Ø50.8 x T5mm
