Patent ID: 6670627
Filing Date: 2003-12-30
Classification: G01N

Abstract:
A surface examining apparatus for examining surface defects of a belt-like examined body comprising:a projector irradiating an examinatorial light on the examined body that runs continuously in a Z-direction, and arranged at a distance from a surface of the examined body in a Y-direction orthogonal to the surface of the examined body and arranged inwardly of outer ends of the examined body in the width direction thereof in an X-direction orthogonal to both of the Z-direction and the Y-direction; a light receiver detecting the light that has passed through the examined body; and a light shielding unit including a light shielding member that is arranged between the projector and the examined body and shields the examinatorial light that is going to travel outwards from the outer ends of the examined body in the width direction thereof, and a moving unit that moves the light shielding member in the X-direction and in the Y-direction simultaneously.