SURFACE FINE IRREGULARITY BODY AND METHOD FOR MANUFACTURING SURFACE FINE IRREGULARITY BODY

摘要

To provide a surface fine irregularity body, having a certain diffusion angle even in a direction orthogonal to a main diffusion direction while maintaining a diffusion angle in the main diffusion direction when being used as an optical diffuser and also easily manufactured, and a method for manufacturing the surface fine irregularity body.SOLUTION: A surface fine irregularity body is a light diffuse sheet 10, etc., having fine irregularities formed on at least a part of a surface. The fine irregularities meander non parallel to each other, consist of a plurality of protrusion line parts 13a irregularly formed and recession line parts 13b between the plurality of protrusion line parts, and have a wavy irregularity pattern 13 having the most frequent pitch of 3-20 μm and a lot of protrusions and recessions 14 formed on the wavy irregularity pattern 13 and having the most apparent frequent diameter of 1-10 μm.SELECTED DRAWING: Figure 2