The Meadowlark Optics Polarimeter provides highly accurate and reliable polarization measurements in an easy to use instrument, suitable for manufacturing and laboratory applications. This compact system with convenient computer control accurately measures Stokes Parameters ten times per second. It quantifies the State of Polarization (SOP) and graphically displays the Poincaré Sphere, Polarization Ellipse, or a Running Chart. The Meadowlark Optics Polarimeter utilizes liquid crystal variable retarders, and its lacks of moving parts ensures compatibility with stability sensitive applications while minimizing risk of wear. Patented algorithms provide high accuracy and calibration versatility. An Eigenstate Calibration Set, sold separately, can provide convenient and accurate means to calibrate the polarimeter to three common wavelengths: 532, 632.8, or 1064nm.