Patent ID: 7182471
Filing Date: 2007-02-27
Classification: G03B,Y10S

Abstract:
1. A projection type display apparatus comprising: a lamp to emit light; a rod type integrator comprising a solid rod to have the light from the lamp enter an entrance face at an end thereof and to guide the light by having the light internally reflected therein as well as to emit the light from an exit face at another end thereof; an electro-optical device having an illuminated surface, on which the light emitted from the integrator is illuminated, and being provided to modulate the light for forming an image; and optical components, including a lens unit, to project, onto a screen, the image formed by the electro-optical device, wherein a glass plate is attached to the exit face of the solid rod, wherein the exit face of the solid rod serves as a focal plane of the lens unit which is placed facing the exit face of the solid rod, with the glass plate intervening between the lens unit and the exit face of the solid rod; wherein the glass plate has a flange-shaped extension portion extending from periphery of the solid rod, the flange-shaped extension portion serving as a holding portion for holding the integrator; wherein the solid rod is made of a glass material having a rectangular cross section, wherein the glass plate is a parallel glass plate having a uniform thickness and is made of a material having a refractive index similar to that of the solid rod; and wherein a further glass plate is attached to the entrance face of the solid rod.