Referenced Items are not available for this document.
Research was performed on the detection of faults such as shorts, cuts, and nicks in a printed circuit board pattern. The possibility was investigated of detecting a pattern by illuminating a printed circuit board with violet or ultraviolet rays and detecting the pattern using the (yellow or other) fluorescent light emitted by the base material consisting of glass-epoxy or glass-polyimide, etc. It was found that the pattern could be detected clearly by selecting an optical fiber that would separate the emitted fluorescent light from the illumination and using a detector consisting of a high-sensitivity TV camera that produces a silhouette image in which the base material is bright and the pattern is dark. A printed-circuit-board pattern inspector using this approach was developed. Test operation of the inspector in a plant demonstrated that it performs consistently good pattern inspections
Published in:
Pattern Analysis and Machine Intelligence, IEEE Transactions on
(Volume:10
,
Issue:
1
)
Date of Publication: Jan 1988
- Page(s):
- 69 - 78
- ISSN :
- 0162-8828
- INSPEC Accession Number:
- 3133525
- Digital Object Identifier :
- 10.1109/34.3868
- Product Type:
- Journals & Magazines
- Date of Current Version :
- 06 August 2002
- Issue Date :
- Jan 1988
- Sponsored by :
- IEEE Computer Society
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