Patent ID: 8888293

Claim:
An image projection apparatus comprising: plural light modulation elements; a color separation/combination optical system configured to, in a specific cross section, separate light from a light source into plural color lights, introduce the respective color lights to the corresponding light modulation elements, combine the color lights modulated by the light modulation elements, and introduce the combined color lights to a projection optical system; an optical system holding member configured to hold the color separation/combination optical system; an electrical circuit substrate attached to the optical system holding member parallel to the specific cross section, and electrically connected to the light modulation elements; and an optical element provided separately from the light modulation elements and being insertable into and extractable from the color separation/combination optical system independently of the light modulation elements, wherein the optical system holding member has a configuration allowing, in a direction orthogonal to the specific cross section on an opposite side to a side on which the electrical circuit substrate is attached, the insertion and extraction of the optical element into and from the color separation/combination optical system.