| 摘要 |
A color image projecting device includes an illuminating optical system and a projection optical system. The illuminating optical system includes a light source emitting white light including red, green, and blue colors, a dividing-spectra block having reflecting surfaces reflecting the red and blue colors of the light received from the light source toward left and right while transmitting the green color, a red block having a dichroic mirror provided in contact with the dividing-spectra block and reflecting the red color, reflected off the reflecting surface of the dividing spectra block, toward the projection optical system, a blue color block having a dichroic mirror like that of the red block, and a green block having a dichroic mirror reflecting the transmitted green color of light toward the projection optical system.
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