| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for measuring retardation of each layer of an optically anisotropic film comprising two types of layers without separating the respective layers. <P>SOLUTION: The retardation of the optically anisotropic film is measured by: a step for applying light in a substantially perpendicular direction to the optically anisotropic film and measuring a change (1) in its transmission and polarization state; a step for applying light to a direction of an azimuth angle of -5° to +5° and a polar angle of θ<SB POS="POST">1</SB>(where, 30°≤θ<SB POS="POST">1</SB>≤70°) with respect to an in-plane slow-axis direction of the optically anisotropic film and measuring a change (2) in the transmission and polarization state; a step for applying light to a direction of azimuth angle of θ<SB POS="POST">2</SB>(where, 30°≤θ<SB POS="POST">2</SB>≤60°) and a polar angle of θ<SB POS="POST">3</SB>(where, 30°≤θ<SB POS="POST">3</SB>≤70°) with respect to the in-plane slow-axis direction of the optically anisotropic film and measuring a change (3) in the transmission and polarization state; and a step for calculating an in-plane retardation Re and a thickness-direction retardation Rth of each layer using the changes (1)-(3) in the transmission and polarization state. <P>COPYRIGHT: (C)2012,JPO&INPIT |
