Patent ID: 6726331
Filing Date: 2004-04-27
Classification: G03B

Abstract:
An image synthesizing optical apparatus comprising:a first display for modulating a first color beam according to an input image signal and outputting the first color beam thus modulated; a second display for modulating a second color beam according to an input image signal and outputting the second color beam thus modulated, said second display being arranged such that an optical axis of the second color beam outputted from the second display coincides with an optical axis of the first color beam outputted from the first display; a third display for modulating a third color beam according to an input image signal and outputting the third color beam thus modulated, said third display being arranged such that an optical axis of the third color beam outputted from the third display crosses a midpoint between the first display and the second display, on the optical axis of the color beams outputted from the first display and from the second display; a color beam combining unit disposed at the midpoint and configured to combine the color beams outputted from the first display, from the second display, and from the third display; and a support for supporting the first display, the second display, the third display, and the color beam combining unit, wherein the support maintains optical path lengths of the color beams from the first display, from the second display, and from the third display to the color beam combining unit equal despite a change in temperature.