Patent ID: 8089696
Filing Date: 2012-01-03
Classification: G02B,G03B

Abstract:
1. An illumination optical system comprising: a condenser that converges light emerging from a light source so that convergent light emerges from the condenser; a first lens array that converts convergent light emerging from the condenser into a plurality of parallel bundles of light in a first cross sectional plane that contains an optical axis of the illumination optical system; a second lens array that converts a plurality of convergent bundles of light emerging from the first lens array into a plurality of parallel bundles of light in a second cross sectional plane that contains the optical axis of the illumination optical system and perpendicular to the first cross sectional plane; and a polarized beam splitting surface that guides the plurality of bundles of light emerging from the second lens array to an illuminated surface, wherein light incident on the condenser is compressed by the condenser, the first lens array, and the second lens array, the second cross sectional plane is parallel to the normal of the polarized beam splitting surface; let L