| 摘要 |
PURPOSE: A microlens array sheet used in a lighting device is provided to increase the concealment property of a microlens array sheet by flex of light from a gap part. CONSTITUTION: A substrate(10) transmits light. A plurality of unit lenses(11) is arranged in one direction of the substrate. A concave curvature(12) is formed in a gap between unit lenses. A concave surface is formed in non-rotary symmetry about a central axis. |
