OPTICAL SHEET AND SURFACE LIGHT SOURCE DEVICE

摘要

PROBLEM TO BE SOLVED: To provide an optical sheet capable of effectively making an image of a light source inconspicuous.

SOLUTION: The optical sheet 10 is arranged to face a light source 16. The optical sheet includes: a base part 20 of a sheet-like part; a plurality of first unit prisms 30 installed on a light inlet side surface 22 of the base part; and a plurality of second unit prisms 40 installed on a light outlet side surface 24 of the base part. The first unit prism is arranged on the outside of a region containing a position facing the light source out of the light inlet side surfaces of the base part.

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