Rochon Polarizers Rochon polarizer is made of two birefringent material prisms cemented or optically contacted together. The Rochon prism was invented by and is named after Abb Alexis Marie Rochon. It is in many ways similar to the Wollaston prism, but the ordinary ray passes through the prism undeviated. Any separation angle can be designed according to request of customers. Features Multiple Polarization Materials Available Ordinary Rays Pass Through Undeviated Extraordinary Rays Deviate Photonchina Specifications Material: a-BBO, Calcite, YVO4,Quartz,MgF2 Wavelength Range: a-BBO 190-3500nm,YVO4 500-4000nm Quartz 200-2300nm Calcite:350-2300nm Extinction Ratio: Quartz