| 摘要 |
PROBLEM TO BE SOLVED: To provide a microlens array sheet 1 suppressing a conspicuous macro unevenness which is a problem in large-area lens sheets, high in productivity, low in manufacturing cost and high in light diffusivity. SOLUTION: The micro lens array sheet is constituted so that approximately semi-spherical unit lenses 2 are two-dimensionally arrayed at a 200μm pitch or less, and it is characterised in that a fine rugged part of which the surface roughness Ra is≥0.001μm is formed on the lens surface of each unit lens 2 and the fine rugged part is fine and approximately semi-spherical ruggedness arranged at random. COPYRIGHT: (C)2005,JPO&NCIPI
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