| 摘要 |
PROBLEM TO BE SOLVED: To provide an authenticity determination tool at a low cost with which authenticity determination can be carried out intuitively by visual observation.SOLUTION: Provided is an authenticity determination tool including a phase difference material layer which has a linear polarization film and a 1/4 phase difference film, and in which a slow axis of the 1/4 phase difference film is fixed at an angle of +45 degrees or -45 degrees with respect to the polarization axis of the linear polarization film, and which is coated and formed like a pattern between the linear polarization film and the 1/4 phase difference film. By using the authenticity determination tool of the present invention, an authenticity determination tool is provided at a low cost for carrying out authenticity determination intuitively by visual observation.SELECTED DRAWING: Figure 1 |
