| 摘要 |
PROBLEM TO BE SOLVED: To provide a projection type image display device that can be downsized or the like. SOLUTION: A collimated light reflected on a parabola reflector 3 of the light source 1 and emitted is made incident onto a concave mirror array 25 which is placed at a tilt angle of 45 deg. with respect to the optical axis. The collimated light made incident onto each concave mirror of the concave mirror array 25 is focused in the vicinity of each convex lens of an integrator lens 26 and emitted onto the entire face of liquid crystal panels 31 (32, 33) via the lens or the like. Thus, partial luminance unevenness existing in the light emitted from the light source 1 is averaged similarly to the case with a conventional optical system comprising a couple of integrator lenses so as to reduce the difference of the amount of light between the center of the image and the circumference. |
