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Publication of MY115401ApublicationCriticalpatent/MY115401A/en
Investigating Materials By The Use Of Optical Means Adapted For Particular Applications
(AREA)
Abstract
A METHOD AND APPARATUS FOR INSPECTING A PRINTED CIRCUIT BOARD ASSEMBLY (1) ESPECIALLY WITH SURFACE MOUNT DEVICES ARE PROVIDED. THE METHOD AND APPARATUS INCLUDE A MULTIPLE CAMERA SET-UP UTILIZING BOTH COLOR AND MONOCHROME IMAGES. A VERY STRONG WHITE LIGHT (7) IS EMPLOYED AS THE LIGHT SOURCE. THE MULTIPLE CAMERA SETUP INCLUDES FRONTAL AND OBLIQUE LOOKING CAMERAS TO EXAMINE THE PRINTED CIRCUITED BOARD ASSEMBLY (1) FROM DIFFERENT ANGLES. THE STRONG WHITE LIGHT SOURCE (7) PROVIDES SUFFICIENT ILLUMINATION EVEN AT A SMALL CAMERA APERTURE HENCE INCREASING THE DEPTH (15) OF FIELD. THE METHOD AND APPARATUS ARE RESISTANT AGAINST WARPAGE (16) OF THE PCB AND VARIATIONS IN COMPONENTS HEIGHT.FIGURE 1
MYPI98014331998-02-171998-04-01Method and an apparatus for inspection of a printed circuit board assembly.
MY115401A
(en)
Method for inspection of printed circuit board assembly method for inspection of printed circuit board assembly by arithmetic comparison of several pictures in differenby arithmetic comparison of several pictures in different colours t colours