A screen panel includes a rigid glass, a lenticular lens and a Fresnel
lens laminated with each other, and the edges of the screen panel are
sealed. An air evacuation path is formed between the lenses by wires
inserted between the contact surfaces of the lenses, or by convexes or
concaves previously formed on one of the contact surfaces. Because of the
provision of the air evacuation path, the air between the lenses of the
screen panel is sufficiently evacuated, and the lenses can closely
attached to each other. Therefore, the flatness of the screen panel can
be enhanced, and the degradation of the image quality can be prevented.