OPTICAL DEVICE AND PROJECTIVE DISPLAY DEVICE USING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide an optical device capable of forming light beams having a uniform angle of incidence. SOLUTION: The optical device forms a plurality of virtual light sources by reflecting incident beams from an incident end of the pole-shaped optical device at an inner side surface of the pole-shaped optical device, and includes a diaphragmatic means that selectively pass the light beams from a secondary light source image that is focused by collecting the light beams from the virtual light sources. Therefore, the light beams having the uniform angle of incident are formed.