Abstract:
A method is disclosed for calibrating a camera used in a scanner for scanning images onto a printed circuit board. The calibration method determines a transformation between the camera and the scanner by writing a pattern on a photosensitized substrate using the scanner, where the pattern is visible without development, and using the camera to image the pattern, from which a transformation between the imager and scanner coordinate systems is determined.
Abstract:
A method for aligning an image to be recorded by a direct image scanner on an upper layer of a printed circuit board with an image recorded on a lower layer thereof, the method comprising: visually imaging a portion of the image on the lower layer; and recording a pattern on the upper layer, referenced to coordinates of the visual image of the portion.
Abstract:
A method for aligning an image to be recorded by a direct image scanner on an upper layer of a printed circuit board with an image recorded on a lower layer thereof, the method comprising: visually imaging a portion of the image on the lower layer; and recording a pattern on the upper layer, referenced to coordinates of the visual image of the portion.
Abstract:
A method for aligning an image to be recorded by a direct image scanner on an upper layer of a printed circuit board with an image recorded on a lower layer thereof, the method comprising visually imaging a portion of the image on the lower layer and recording a pattern on the upper layer, referenced to coordinates of the visual image of the portion.