INSPECTION DEVICE AND INSPECTION METHOD FOR MEMBER HAVING FINE UNEVEN STRUCTURE ON SURFACE THEREOF MANUFACTURING METHOD FOR MEMBER HAVING ANODIC ALUMINA LAYER ON SURFACE THEREOF AND MANUFACTURING METHOD FOR OPTICAL FILM

摘要

to provide a test apparatus and test methods that can easily examine the shape and the thickness of the anodized alumina of the fine concavo-convex structure of the surface of the anodized alumina. Inspection device of the anodized alumina of the invention, the light irradiated irradiation means 22 for irradiating light to the anodic oxidation alumina of the inspection object and, from the image pickup means 24 and irradiation means for sensing the light passing through the polarizing means and a polarizing means (28) and, on the basis of the obtained color information from the image picked up by the image sensing means characterized in that comprises the image processing means 26 for determining the acceptability of the state of the anodized alumina for polarizing ;