OPTICAL FILM AND OPTICAL DEVICE USING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide an optical film capable of achieving both high light extraction efficiency and high brightness in the normal line when applied to a surface-emitting optical device.

SOLUTION: An optical film 1 has a rugged structure part 12 constituted of a plurality of convex curved surfaces 12a. The aspect ratio (B/A) of each of the convex curved surfaces 12a of the rugged structure part 12 is a ratio of a height B to the longest diameter A of a bottom surface part and is 0.5 or more and 1.4 or less.

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