| 摘要 |
PURPOSE: An optical sheet is provided to improve production efficiency and reduce production costs by preventing damage to a structured surface even when a certain weight is applied from the outside. CONSTITUTION: An optical sheet includes a base material layer(10) and a light-concentrating layer(40). The light-concentrating layer is made of a hardening resin containing an element with a slip property in a molecular chain, and has a structured surface. The light-concentrating layer is formed from a hardening composition having a glass transition temperature less than 40 °C. The thickness of the base material layer is preferably from 15 through 400 μm in order to have advantages in mechanical strength, thermal stability, and flexibility, and to prevent a loss of transmitted light. |
