| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent linear transmission light in an optical device having a micro-lens array. <P>SOLUTION: An optical sheet 1 has a light incident face 1a and a light emission face 1b. The micro-lens array 10 is formed on at least the light incident face 1a or light emission face 1b. The micro-lens array 10 has a plurality of micro-lenses 11 arranged in a cycle and in a matrix. Each micro-lens 11 has a convex or concave shape. In the light incident face 1a or light emission face 1b on which a micro-lens array 10 is formed, a flat face 12 on which the micro-lens array 10 is not formed has surface rouness showing Ra ≥0.1 μm but ≤2 μm, wherein a center line arithmetic average roughness denotes Ra. <P>COPYRIGHT: (C)2010,JPO&INPIT |
