true zero order waveplate 12 7mm

True Zero Order Λ/2 Half Wave Plate, Large Feild Angle, For Imaging Systems Overview: Comparing with normal two plates design Zero order waveplates having a relatively larger thickness which reduces the field angle, the True zero order wave plates are made of a very thin plate or cemented with a BK7 substrate, which ensures the best possible field angle, temperature and wavelength performance. True zero order waveplate......