Patent ID: 6242756
Filing Date: 2001-06-05
Classification: G01N,G01R

Abstract:
An apparatus for inspecting an object having a plane, comprising:a camera for sensing an image of the object, the camera having an optical axis passing through the object substantially normal to the plane of the object;an oblique light source for radiating light on the object obliquely to the plane of the object to create an image of a portion of the object, the oblique light source having a portion positioned on one side of the optical axis;a reflector positioned on the opposite side of the optical axis relative to the portion of the oblique light source for reflecting light that crosses the optical axis from the oblique light source to the camera, such that the image of the object portion is reflected to the camera; anda guide for disposing the object in the apparatus in relation to the oblique light source and the reflector, wherein the guide is interposed between the portion of the oblique light source and the reflector and made of light transmissible material.