| 摘要 |
<p>A polarized lighting apparatus according to the present invention comprises a light source (401), an integrator optical system (403), separation means (402) for separating polarized light outgoing from the light source into two polarized light beams (S, P) making an apple less than 90 DEG , and conversion means (442) for aligning the polarization directions of the two polarized light beams. The separation means (402) is disposed either outside or inside a first lens plate (441) of the integrator optical system, or inside a second lens plate. The separation means is preferably a prism beam splitter equipped with a polarizing beam splitter film (426) consisting of a thermally stable dielectric multilayered film. Because the directions of the polarized light beams are aligned according to the present invention, their major proportion can be utilized, and polarized light having uniform brightness can be emitted. Therefore, the present invention is suitable for a projection type display device equipped with a liquid crystal light valve. <IMAGE> <IMAGE> <IMAGE></p> |
