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    • 8. 发明授权
    • Fine particle structure and optical medium
    • 细颗粒结构和光学介质
    • US07063890B2
    • 2006-06-20
    • US10764735
    • 2004-01-26
    • Atsushi TodaYuriko KainoHirotaka AkaoKo Ishimoto
    • Atsushi TodaYuriko KainoHirotaka AkaoKo Ishimoto
    • B32B5/16
    • G03B21/62G02B5/12G02F2201/50G02F2202/32Y10T428/2982Y10T428/2991Y10T428/2993Y10T428/2995Y10T428/2998
    • Such a structure is to be provided in that in the case where a material, such as a protective film, is coated on a fine particle accumulated layer, such as a photonic crystal, penetration of the material into gaps among the fine particles is suppressed, whereby the mechanical strength against bending stress and tensile stress is improved, and peeling and breakage of the fine particle accumulated layer are suppressed, without adverse affect on the optical characteristics, such as reflection characteristics. The fine particle structure contains a visible light absorbing material absorbing visible light as a substrate, having accumulated thereon in this order silica fine particles having a particle diameter of 290 nm as a fine particle layer for reflecting red light, silica fine particles having a particle diameter of 240 nm as a fine particle layer for reflecting green light, and silica fine particles having a particle diameter of 210 nm as a fine particle layer for reflecting blue light, and further provided thereon a polymer layer or a gelatin layer containing a polymer having a size larger than the gaps among the fine particles. The optical medium, such as a reflective type screen, further contains a diffusion film on the polymer layer or the gelatin layer.
    • 要提供这样的结构,即在诸如保护膜的材料被涂覆在诸如光子晶体的细小颗粒聚集层上的情况下,材料渗透到细颗粒之间的间隙中被抑制, 从而提高了抗弯曲应力和拉伸应力的机械强度,并且抑制了微粒聚集层的剥离和破裂,而不会对诸如反射特性的光学特性产生不利影响。 细颗粒结构含有作为基板吸收可见光的可见光吸收材料,其上依次累积有粒径为290nm的二氧化硅微粒作为反射红光的微粒层,具有粒径的二氧化硅微粒 为反射绿光的微粒子层,粒径为210nm的二氧化硅微粒作为用于反射蓝光的微粒层,并且还在其上设置聚合物层或含有聚合物的明胶层,所述聚合物层含有具有 尺寸大于细颗粒之间的间隙。 诸如反射型屏幕的光学介质还在聚合物层或明胶层上包含扩散膜。