METHOD FOR PRODUCING METAL MOLD FOR USE IN DUPLICATING LIGHT DIFFUSION SHEET, LIGHT DIFFUSION SHEET AND METHOD FOR PRODUCING THE SAME, AND SCREEN

摘要

PROBLEM TO BE SOLVED: To provide a method for producing a metal mold for use in duplicating a light diffusion sheet and a method for producing a light diffusion sheet by which a light diffusion sheet having different diffusion angles between in a longitudinal direction and in a lateral direction when light is transmitted or it is reflected or having anisotropy in diffusion characteristics in longitudinal and lateral directions is inexpensively produced, and to provide the light diffusion sheet produced by the method and a screen using the light diffusion sheet.

SOLUTION: The method of producing a mold for use in duplicating a light diffusion sheet is provided. The method includes a step of conducting sandblasting for blasting abrasive material 3 from a blast gun 2 to the surface of a mold base material 1 to form unevenness in the surface of the mold base material 1, wherein the abrasive material 3 is blasted to the surface of the mold base material 1 at a blast angle of less than 90°.

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