Patent ID: 6746123
Filing Date: 2004-06-08
Classification: H04N

Abstract:
A projector comprising:a light source; a first optical element that condenses a light beam from said light source and divides the light beam into a plurality of intermediate light beams, the first optical element having a light emitting side; a second optical element placed on the light-emitting side of said first optical element that converts said plurality of intermediate light beams into one type of polarized light beams and superimposing the polarized light beams on a reflection-type modulation device; only one reflection-type modulation device that modulates light emitted from said second optical element; a polarized light beam selection element placed on an optical path between said second optical element and said reflection-type modulation device that reflects or transmits the light emitted from said second optical element to allow the emitted light to reach said reflection-type modulation device, and that transmits or reflects the light modulated by said reflection-type modulation device to allow the modulated light to reach a projection optical system; and a collimating lens placed between said second optical element and said polarized light beam selection element.