Anti-Glare, Indirect Illumination Device for Electronic Component Inspection
Original Publication Date: 1988-Aug-01
Included in the Prior Art Database: 2005-Feb-15
The use of machine vision and image processing techniques in workpiece inspection is now conventional but still requires complex and costly illumination devices when the workpieces to be inspected are highly light reflective as are the solders on electronic components. The complexity of the illumination devices is due to their required ability to be positioned very close to the solders and to indirectly illuminate them in order that no glaring zones be formed and all details be made visible to the camera of the image processing system. (Image Omitted) The present illumination device includes an ellipsoidal light reflector 1 (Fig. 1) whose inner surface 2 is coated with a mat and white material. A housing 3 containing a plurality of infrared light-emitting diodes (LEDs) 4 is mounted on the reflector.