Alignment systems

B - Operations – Transporting – 41 – F

Patent

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Details

B41F 33/00 (2006.01) H04N 5/225 (2006.01) H05K 1/02 (2006.01) H05K 3/12 (2006.01)

Patent

CA 2176250

Apparatus is provided for aligning two objects (1, 2), such as a board and screen in a screen printer, each having at least one reference mark (6a. 7a) on a surface thereof, whereby alignment of the objects is indicated by alignment of corresponding reference marks on the surfaces of the objects. The apparatus comprises support means for supporting the objects in use with the said surfaces facing one another, and imaging means (20), mounted for movement between the said surfaces in use, for acquiring, on a single imaging surface thereof, simultaneous images of respective areas of the surfaces of the objects, which areas contain corresponding reference marks. The apparatus includes control means (4, 8) for determining the locations of the reference marks in the images and determining therefrom the extent of misalignment of the objects, and means (3), responsive to the control means, for adjusting the relative positions of the objects to bring the objects into alignment. A method for aligning two objects, and imaging means for use in aligning two objects, are also provided.

L'invention concerne un appareil qui permet d'aligner deux objets (1, 2), tels qu'une carte et un écran d'appareil de sérigraphie, dont chacun présente au moins un repère (6a, 7a) sur sa surface, l'alignement de ces objets étant indiqué par celui desdits repères. Cet appareil comprend un support sur lequel sont placés les objets utilisés, leurs surfaces tournées l'une vers l'autre, et un dispositif d'imagerie (20), monté de façon à pouvoir se déplacer pendant son utilisation entre ces surfaces pour acquérir, sur son unique surface d'imagerie, des images simultanées des zones respectives des surfaces de ces objets où se trouvent les repères. Cet appareil comprend un dispositif (4, 8) de commande permettant de déterminer les emplacements des repères dans les images et, à partir de là, déterminer l'erreur d'alignement des objets, et il comprend un dispositif (3), réagissant au moyen de commande, destiné à ajuster les positions relatives de ces objets pour les aligner. L'invention concerne aussi un procédé d'alignement de deux objets, et un dispositif d'imagerie utilisé à cet effet.

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