Inspection apparatus and method of the member having a fine uneven structure on the surface, method of manufacturing a member having to surface the anodized alumina layer, and a method of manufacturing an optical film

摘要

Providing an anode thickness inspection apparatus and method capable of inspecting easily to the shape and anodized alumina fine concavo-convex structure on the surface of the alumina oxide or the like. Inspection apparatus anodized alumina invention, the irradiation unit 22 for irradiating light to the anodized alumina inspected, an imaging means 24 for imaging light passed through the polarizing means, to polarize the light emitted from the irradiating means a polarizing means 28, it is characterized in that it comprises an image processing means 26 for determining the acceptability of the state of the anodized alumina on the basis of the color information obtained from the image captured by the imaging means.