| 摘要 |
<p>The illumination optical system includes an integrator configured to divide light from a light source into plural light fluxes, and a collection optical system configured to collect the plural light fluxes from the integrator toward an illumination surface. A rear principal point of the collection optical system is located closer to the light source than a front principal point of the collection optical system. The configuration provides a compact illumination optical system which brightly illuminates the illumination surface with the light and enables high contrast image projection.</p> |
