1) Optical device 
Polarimetry is the measurement and interpretation of the polarization of transverse waves, most notably electromagnetic waves, such as radio or light waves. Typically polarimetry is done on electromagnetic waves that have traveled through or have been reflected, refracted, or diffracted by some material in order to characterize that object. ==Appl...
• (n.) The art or process of measuring the polarization of light.
in analytic chemistry, measurement of the angle of rotation of the plane of polarized light (that is, a beam of light in which the vibrations of the ...
The measurement of the state of polarization of a beam of electromagnetic radiation.
(po″lә-rim´ә-tre) measurement of the rotation of plane polarized light.
Po`lar·im'e·try noun (Opt.) The art or process of measuring the polarization of light. 
Type: Term Pronunciation: pō′lăr-im′ĕ-trē Definitions: 1. Measurement by polarimeter.