Patent ID: 7494225
Filing Date: 2009-02-24
Classification: G02F,G03B,H04N

Abstract:
1. A projector comprising: an illumination device including: an electro-optic modulator that modulates the illumination beam from the illumination device according to image information, each first small lens in the first lens array has a plane shape compressed in a direction which is either longitudinal or lateral direction forming the illumination beam emitted from the illuminating device into an illumination beam having a sectional shape as to illuminate a part of an image forming area in a first direction in the image forming area of the electro-optic modulator, and to illuminate the whole of the image forming area in a second direction; a light cut-off member that is arranged in a position which is optically conjugate with the plural first small lenses and the elector-optic modulator between the illumination device and the electro-optic modulator, and has a predetermined opening part for adjusting the sectional shape of the illumination beam, the width of the predetermined opening part at a central portion being narrower than the width at both ends of the opening part; a rotating prism that is arranged on the electro-optic modulator side of the light cut-off member, and scans the illumination beam from the light cut-off member, in synchronization with a frame rate of the electro-optic modulator, on the image forming area of the electro-optic modulator in the first direction; and a projection optical system that projects the light modulated by the electro-optic modulator.