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Methods and apparatus for optical product inspection
Optical device for the observation of an elongated object Patent #: 5125052
ApplicationNo. 729921 filed on 07/15/1991
US Classes:382/146, Measuring external leads348/126, Of electronic circuit chip or board359/710, Cylindrical382/298To change the scale or size of an image
ExaminersPrimary: Moore, David K.
Assistant: Johns, Andrew W.
Attorney, Agent or Firm
Foreign Patent References
International ClassG06K 009/00
Foreign Application Priority Data1990-07-17 JP
AbstractA coplanarity measuring apparatus includes an image converting section, an optical lens mechanism, an image processing section, and an arithmetic operating section. The image converting section converts a transmission image of lead end portions of a surface-mount type IC package into image data. The optical lens mechanism vertically enlarges a transmission image, of the lead end portions, which is projected by the image converting section, and horizontally reduces the vertically enlarged transmission image. The image processing section converts the image data output from the image converting section into binary data and forming a profile. The arithmetic operating section calculates a coplanarity from the profile formed by the image processing section and checks whether a product is defective.