Patent ID: 7147333

Claim:
A projector comprising: an illuminating light source for emitting illuminating light; an image display device for modulating said illuminating light into image light; a columnar prism having a dichroic surface which outputs light beams in a direction different from an entering direction of said light beam according to their polarization characteristics and wavelength; a projection lens for projecting said image light; a base plate having a first projection which supports a bottom surface of said prism; holding means including a first bracket fixed on a top surface of said prism and a second bracket fixed on said bottom surface of said prism for holding said image display device such that said image display device faces a side surface of said prism; a first opening formed on said second bracket for fitting to said first projection so as to position said second bracket on said base plate; and an adhesive layer formed with adhesive agent filled into a clearance between said bottom surface of said prism supported on said first projection and said second bracket so as to fix said bottom surface of said prism, said base plate and said second bracket integrally.