ULTRAVIOLET SCATTERING MEMBER, AND OPTICAL MEMBER FOR LIGHT MODIFICATION

摘要

In an ultraviolet scattering film (1), an ultraviolet scattering region (3) is provided in which numerous inorganic microparticles (4) are uniformly dispersed and held on a surface of a transparent resin film (2). The inorganic microparticles (4) have an average particle diameter of 0.2-2.0 µm and include ultraviolet scattering microparticles (4a) having a particle diameter of 0.2-0.5 µm and iron-oxide-component-containing microparticles (4b) having a yellow color or a red color. The ultraviolet scattering microparticles (4a) have light-transmitting properties and a higher density than a resin material for forming the resin film (2). The ultraviolet scattering film (1) is superposed so as to cover a light-receiving surface of a plant growing film (10) provided with light-modifying effects through use of a fluorescent dye, and a composite film (100A-100F) is formed. Kaolinite microparticles, for example, are used as the ultraviolet scattering microparticles (4a). Kanto loam, yellow iron oxide microparticles, red oxide microparticles, yellow ochre (loess), etc., are used as the iron-oxide-component-containing microparticles (4b).