Patent ID: 7576859
Filing Date: 2009-08-18
Classification: B41J,G01B

Abstract:
1. An alignment apparatus, which is used when positioning and joining a plurality of workpieces relative to each other, each workpiece having a plurality of alignment marks for alignment, the alignment apparatus comprising: a transparent mask provided with reference marks with which the alignment marks are aligned; a mirror disposed between the mask and a workpiece; an optical unit having an optical axis pointed in a direction of the mirror via a reference mark from a side of the mask opposing the mirror, the optical unit enabling the reference mark and a virtual image of the reference mark reflected in the mirror to be observed simultaneously; and an adjusting unit for making optical axis adjustment of the optical axis, based on the observation by the optical unit, such that a real image of the reference mark and the virtual image of the reference mark reflected in the mirror are superposed.