Wouaston prism when incident ray lie in the 渥氏棱镜 光轴 principal section, the vibration 光 of O-ray normal to the principal section and the vibration of e ray parallel to the principal section 光 0光 sin i C 光轴 e Sv<v O、e二光通过晶体 后被分得很开,从 而获得偏振光。 光轴 0光光 轴 光轴 o光 e光 O光 e光 o e v  v o e v'  v' Wouaston prism 渥氏棱镜光轴 o光 e光 when incident ray lie in the principal section, the vibration of O-ray normal to the principal section and the vibration of e￾ray parallel to the principal section. n v C r i = = sin sin O、e二光通过晶体 后被分得很开，从 而获得偏振光