To secure excellent visible light reflectivity and infrared ray transmittance by forming a photocatalyst layer on a visible light reflection infrared ray transmitting film.

Out of light radiated from a tungsten halogen lamp 11 toward a rotary quadratic surface reflector 9 to be incident to a reflected face of the reflector 9, visible light is reflected on a visible light reflection infrared ray transmitting film 2. In contrast, most of the infrared ray is absorbed toward the reflector 9 (base member) through the film 2, and then, heat is radiated via the reflector base member 9. That is, the infrared ray is selectively transmitted and absorbed, so that the visible light, which does not include the infrared ray and is decreased in temperature, is reflected, thereby achieving light irradiation and illumination without any thermal effect. Meanwhile, a photocatalyst layer 3, which never deteriorates the visible light reflecting and infrared ray transmitting effects, is formed on the film 2, so as to exhibit photocatalyst activity upon light radiation from the lamp 11. Consequently, it is possible to easily decompose and remove organic dusts or the like floating or being present in the surroundings and adhering the surface, thus preventing contamination.