| 摘要 |
PURPOSE: To provide a color optical element which is high in the utilization efficiency of light energy and suitable as a display element by providing optical third films, which have dielectric multi-layered film structure, repetitive units consisting of areas differing in wavelength characteristics, and shield the periphery of a pixel opening part, optically in series. CONSTITUTION: This element has an optical thin film layer 2 of the primary colors, primary-color areas 2A-2C, a transparent substrate 20, and a light shield area 28. Further, a light source 5A, a reflecting mirror 5B, incident light 6A on the optical film, reflected light 6B from the optical thin film, and transmitted light 6C are shown. This optical thin film is formed basically by alternately laminating a high refractive index dielectric layer and a low refractive index dielectric layer having 1/4-wavelength optical thickness. When the incident light 6A is white light, the reflected light 6B and transmitted light 6C are in mutually complementary color relation, so when the reflected light is in an additive mixed primary color, the transmitted light is in a subtractive mixed primary color. The light shield area 28 is a black absorptive light shield area and can be provided in a shape shielding the periphery of the opening part of a combined element from light. |
