OPTICAL SHEET, SURFACE LIGHT SOURCE DEVICE, AND IMAGE DISPLAY DEVICE

摘要

PROBLEM TO BE SOLVED: To provide excellent finger print resistance (finger print adhesion prevention property) to an optical function expression part having convex optical units provided on an optical sheet.SOLUTION: There is provided an optical sheet 10 provided, on one side of a transparent substrate 11, with an optical function expression part 12 in which a plurality of convex optical units 12a having an apex or a ridge line are arranged, where the optical function expression part 12 contains an antifouling agent selected from a silicon compound and a fluorine compound; when the surface of the antifouling agent is subjected to XPS analysis, the total abundance of silicon atoms and fluorine atoms is 3% or more; when measured at an indentation load of 0.5 mN in conformity with ISO 14577-1, the indentation depth at the apex of the optical unit is 0.6 μm or more.SELECTED DRAWING: Figure 1