An optical device (44) is provided with an optical modulator (440), a color combining optical device (444) and an optical converting element (443), the optical modulator (440) being attached to the color combining optical device (444) through a position-adjusting spacer (449) made of a heat-insulative...http://www.google.com/patents/US6882480?utm_source=gb-gplus-sharePatent US6882480 - Optical device, optical unit and projector
