Waveplates (retardation plates or phase shifters) are made from materials which exhibit birefringence. The velocities of the extraordinary and ordinary rays through the birefringent material varies inversely with their refractive indices. This difference in velocities gives rise to a phase difference when the two beams recombine. 
                                                                                                                                        
                                                    Hot Tags : 
                                                                                                            Half Waveplate
                                                                                                            Quarter Waveplate
                                                                                                            Dual Wavelength Waveplate
                                                                                                            Cemented Zero Order Waveplate
                                                                                                            Air Spaced Zero Order Waveplate
                                                                                                            Ture Zero Order Waveplate
                                                                                                    
                                             
                                            Read More