super achromatic waveplate

MgF2 光学波長板 フラット リターダンス スーパーアクロマティック波長板

Super Achromatic Waveplate Flat Retardance Over A Super Broad Spectral Range Overview: Super Achromatic Wave plate (Retarder) consists of three achromatic waveplates (made of quartz, MgF2 and sapphire) that optically cemented to maximize transmission and carefully aligned to minimize the wavelength dependence of the retardance based on Pancharatnama's design is used for modulator in polarimeter. Comparing to the normal achtomatic waveplate which consists of one quartz plate