Patent ID: 6801651
Filing Date: 2004-10-05
Classification: G01N

Abstract:
A visual inspection apparatus for macroscopic inspection of an object having at least one of a film structure and a minute pattern, the apparatus comprising:image input means including an image pick-up optical system for picking up an image of the object in a direction substantially perpendicular to the object, the image input means inputting at least four monochrome images obtained subsequently by the image pick-up optical system using at least four kinds of narrow-band lights each having a different center wavelength; a color display; and pseudo image preparing means for dividing the input monochrome images into at least two groups, each group including three monochrome images, and for assigning image information of the three images of each group to each color image information of red, green and blue of the color display to obtain at least two pseudo color images; and display control means for switchingly displaying the obtained pseudo color images on the color display.