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Polarizers


λ/4-retarders convert linearly polarized beams to circular and circular to linear. λ/2-retarders convert polarization direction arbitrarily.
Quartz waveplates are zero-order retardation plates composed of pairs of optically contacted crystalline quartz plates mounted on aluminum frames.
Quartz depolarizers convert linearly polarized input beams to unpolarized beams and are used upstream and downstream of measurement devices that must avoid polarization.

OSE-WPM

Mica waveplates are zero-order retardation plates designed for a wavelength of 550 nm and effective from 400 - 700 nm.
This optical retardation can be given without the wavelength dependence for all visible regions.