| 摘要 |
PROBLEM TO BE SOLVED: To provide a light guide that achieves high productivity and excellent shape transferability.SOLUTION: The light guide is formed of a transparent resin plate with shapes formed on the surface, and includes three layers, a primary layer, a surface layer, and a back layer. A pattern with ridges is formed on at least one surface of the surface layer and the back layer. A difference between softening point temperature of resin that forms the primary layer and softening point temperature of resin that forms the surface layer and resin that forms the back layer is 4 to 12°C, respectively. |
