A new and distinct cultivar of Gerbera plant named \u2018Garisabel Imp. To solve the problem, a single sideband modulated optical pulse train is generated by driving a Mach-Zehnder optical modulator for optical pulse generation with a laser source’s sine wave clock signals that have been rendered 90 degrees out of phase from each other. The controller controls the optical system to focus illumination light from the projection optical system on a projection surface, in the display mode, and to focus illumination light from the projection optical system at a position different from the projection screen, in the illumination mode. This displacement oscillates at a single period in a tracking direction.