ILLUMINATING DEVICE WITH POLARIZATION RECYCLING IN A DOUBLE PRISM

摘要

The invention concerns a illuminating system comprising an optical source (S) emitting a non-polarized light beam (F1), a polarization splitter including a grid polarizer (3) enclosed between the surfaces (10 and 20) of two prisms (1, 2). The light beam enters the first prism through one surface (12) and reaches the polarization splitter (3) which transmits light having a first polarizing direction to the surface (22) which reflects it towards an output surface (21). Moreover, the splitter reflects light having a second direction to the surface (12) which reflects it towards an output surface (11). The invention is applicable to display and projection systems.