| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a broadband reflective polarizer which shows improved optical properties at large viewing angles, in particular, an improved off-axis brightness, and also has a large bandwidth comprising a substantial portion of the visible spectrum of light, and in the ideal case, covering the whole visible spectrum. <P>SOLUTION: The broadband reflective polarizer, that includes a layer of a polymerized mesogenic material, exhibiting a helically twisted structure with planar alignment, is obtained by a process, wherein a mixture of a chiral polymerizable mesogenic material which includes (a) at least one type of a chiral polymerizable mesogenic compound; (b) at least one chiral compound that can be polymerizable and/or mesogenic; and (c) a polymerization initiator, is applied onto a substrate or in between two substrates in a state of a layer, aligned in a planar orientation so that the axis of the molecular helix extends transversely to the layer and is polymerized by exposure to heat or to actinic irradiation. <P>COPYRIGHT: (C)2010,JPO&INPIT |
