Patent ID: 8029144
Filing Date: 2011-10-04
Classification: G02B,G03B

Abstract:
1. A color mixing rod integrator for a plurality of beams of laser light of a plurality of primary display colors, comprising: a rod-shaped body having an interior that passes laser light therethrough and an interior surface that reflects light incident thereon; an entrance face covered with a first reflective coating to reflect light incident thereon back into the interior of the rod-shaped body and positioned on a first end of the rod-shaped body having a plurality of holes therein such that each hole of said plurality of holes allows light of at least one beam of said plurality of beams to pass therethrough into the interior of the rod-shaped body; an exit face positioned on a second end of the rod-shaped body opposite to and parallel to the entrance face, said exit face being configured to allow a part of light incident thereon to pass therethrough; and at least one lens for diverging each of said beams toward said exit face through said interior, wherein part of the laser light entering said color mixing rod integrator via said plurality of holes is forced to pass through the interior thereof several times before passing through said exit face and then exiting through said exit face as exit light, and wherein the exit light is homogenized by the color mixing rod integrator.