Patent ID: 6665123
Filing Date: 2003-12-16
Classification: G02B

Abstract:
A projector comprising:a light source; color separating means for separating a light beam emitted from said light source into light beams of respective colors; light valves which modulate the separated light beams of respective colors; a dichroic prism which synthesizes the modulated light beams of respective colors that have been modulated via said light valves; and a projection lens which enlarges and projects the synthesized modulated light beam onto a screen; wherein said dichroic prism is a prism formed by pasting together four triangular prisms which are substantially right-angled triangular prisms in cross section; and said triangular prisms have projections or grooves that have two faces forming planes parallel to two pasted faces of triangular prisms and are integrally molded in faces of the triangular prisms that are substantially perpendicular to the light beams.