| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a laminated film which has a high bonding strength at a boundary face and is suppressed in the occurrence of iridescent unevenness. <P>SOLUTION: The laminated film 10 is formed by applying a first layer 12 and a second layer 13 in the order starting from a support body 11 on at least one side surface of the support body 11 made of biaxial stretched polyester. The first layer 12 is the layer containing fine particles and binders mainly composing one of tin oxide, indium oxide, titanium oxide and zirconium oxide, and the second layer 13 is the layer provided so as to contact to the first layer 12. When respective refraction factors of the support body 11, the first layer 12, and the second layer 13 are set to be η1, η2, and η3, the refraction factors of respective layers are adjusted so that the differences between respective refraction factors ¾η1-η2¾ and ¾η1-η3¾ are all not more than 0.03. Since the laminated film 10 has a high bonding strength on respective boundary layers and interference of light is reduced, it is an optical film having less iridescent unevenness and showing excellent optical characteristics. <P>COPYRIGHT: (C)2008,JPO&INPIT |
