Waveplates are essential optical components for controlling and measuring polarization states of light. They modify polarization through a parameter called retardance, without affecting the degree of polarization. The most commonly required retardances are half-wave and quarter-wave, and their accuracy directly impacts the purity of the output polarization state.

However, both waveplate manufacturers and users often lack precise, accessible methods for retardance measurement. This article explores the fundamentals and limitations of retardance metrology and highlights Meadowlark Optics’ advanced capabilities and equipment for high-precision retardance characterization.

Keywords: waveplates, retardance metrology, polarization optics, half-wave plate, quarter-wave plate, optical retardance measurement, precision optics, Meadowlark Optics.