Uncertainty evaluation of a confocal image alignment assembly system for miniature parts

The confocal image alignment assembly principle is briefly proposed and the micro-assembly system based on this alignment principle is set up. The confocal image alignment principle can greatly improve the accuracy and efficiency of the micro-assembly. The composition of micro-assembly system is introduced in detail. The detection accuracy of the laser scanning confocal microscope can reach the submicron level. The uncertainty is a significant assessment criterion of an assembly system. So the assembly deviation uncertainty of the micro-assembly system is calculated and obtained. The value of the uncertainty is a little big for precise micro-assembly. So the system has to be calibrated and the errors of the components should be compensated. Then the error of the assembly can be reduced a lot.