Patent ID: 8433102
Filing Date: 2013-04-30
Classification: G01B,G01N

Abstract:
1. A surface roughness inspection system comprising an imaging unit comprising a line sensor, oriented to scan a surface of a disk being inspected in a direction perpendicular to a direction of extension of said line sensor, and outputting a density signal for each pixel from said line sensor, a light source emitting light which is set so as to irradiate the surface of the disk, and a processor processing a density signal from said line sensor of said imaging unit, said processor including a density state generator generating density state information showing the state of density in a scan direction of the surface of the disk as information representing the roughness of the surface of the disk in the scan direction based on all of the pixel density values acquired for the surface of the disk, and an output controller driving an output device to output the density state information generated by said density state generator, wherein said line sensor is disposed to extend in a direction substantially perpendicular to the surface of the disk and the disk is turned about an axis vertical to the surface of the disk so as to scan a peripheral end face of said disk wherein said density state generator wherein said output device controlled by said output controller outputs the density state information so as to indicate the area density values corresponding to the respective scan positions.