| 摘要 |
PROBLEM TO BE SOLVED: To provide an illumination device capable of compressing a plurality of light beam fluxes, while achieving miniaturization and to provide a projector.SOLUTION: The illumination device includes a plurality of solid light sources two-dimensionally arranged, a collimation optical system which comprises a plurality of collimator lenses and on which the light beam fluxes from the plurality of solid light sources are made incident, first light beam flux compression means for compressing the light beam fluxes from the collimation optical system in a first direction, and second light beam flux compression means for compressing the light beam fluxes from the first light beam flux compression means in a second direction. One of the first light beam flux compression means and the second light beam flux compression means is a reflection element in which a plurality of reflection surfaces are arrayed stepwise and the other is an optical element including the reflection element and a polarization separation element. |
