DISPOSITIF DE SEPARATION DE POLARISATION ET APPLICATION A UN SYSTEME D'ECLAIREMENT D'UN ECRAN A CRISTAL LIQUIDE

摘要

The polariser includes a double prism (DPC) with an input surface (A1) which receives an incident beam (F). A polarisation filter is placed on the output surface of the prism. A mirror (M3) is attached to a reflection surface of the prism (A3). The incident beam (F) is totally reflected by the glass-air surface (D1). Half of the beam intensity is transmitted through the prism being polarised. The other half of the beam is reflected by the filter and falls again on the surface D1 at angle theta2. The beam is then transmitted through the prism and reflected by the mirror so that its polarisation changes from left to right.