| http://www.w3.org/ns/prov#value | - In the dark state, the retarder arrangement rotates the plane of polarisation of plane-polarised light directed by the beam splitter towards the reflector by substantially n???180???, where n is an integer, and in a bright device state the first retarder has a retardation of substantially ??/2 and the second retarder has a retardation of substantially ??/4.
|
