Coherent light from a laser is magnified, made into a parallel light flux, and irradiated on a hologram recording medium in which a hologram image of a scatter plate is recorded. A hologram reproduction real image of the scatter plate is generated using the parallel light flux as illumination light for reproduction. The spatial light modulator consisting of a liquid crystal display, etc., is disposed so as to overlap on the position of the hologram reproduction real image, and a modulated image is obtained on the surface of the reproduction real image of the scatter plate. The modulated image is projected onto the screen by the projection optical system.