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Glassware inspection using optical streak detection

  • US 4,679,075 A
  • Filed: 04/29/1985
  • Issued: 07/07/1987
  • Est. Priority Date: 04/29/1985
  • Status: Expired due to Term
First Claim
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1. A method for inspecting articles for manufacturing defects, said method comprising the steps of:

  • illuminating an article to be inspected;

    optically scanning a portion of the article with an optical scanner during an inspection interval while causing relative motion between the article and the optical scanner, said optical scanner comprising a matrix of video elements arranged in rows and columns, and said relative motion being great enough to cause said optical scanner to register a streaked image;

    deriving a series of chronologically sequential frames from said optical scanner corresponding to output signals of the matrix of video elements, andfor each of a plurality of linear portions of each frame, summing the output signals of the corresponding video elements to identify an image streak registered in at least one of said linear portions representing a defect in the article.comparing said line sum signal arrays with a predetermined defect standard to determine any row or rows of the arrays which signifies the presence of a defect in the article.

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