Difference between quarter wave plate and half wave plate
Introduction to Waveplates
Introduction to Waveplates
Optimal design of quarter-wave plate with wideband and wide viewing angle for three-dimensional liquid crystal display: Journal of Applied Physics: Vol 111, No 10
Understanding Waveplates and Retarders | Edmund Optics
Polymer Zero-Order Quarter-Wave Plates
Polarization of an Optical Wave through Polarizers and Wave Plates - Wolfram Demonstrations Project