The direction of apparent illumination is defined by the orientation of the Wollaston prisms.
2.
It is made from two Wollaston prisms.
3.
He invented the camera lucida ( 1807 ), the reflecting goniometer ( 1809 ), and the Wollaston prism.
4.
A "'Wollaston prism "'is an optical device, invented by William Hyde Wollaston, that manipulates polarized outgoing beams.
5.
The system consists of a special prism ( Nomarski prism, Wollaston prism ) in the condenser that splits light in an ordinary and an extraordinary beam.
6.
The Wollaston prism consists of two orthogonal calcite prisms, cemented together on their base ( traditionally with Canada balsam ) to form two right triangle prisms with perpendicular optic axes.