Optical system for visual analysis of two assemblies by superimposing of an image onto an assembly

Abstract From the Canadian patent

An optical system for forming an image of a reference electronic assembly board or various other articles by presenting the reference assembly onto a fully reflecting surface. The image is projected onto the first surface of a half-silvered mirror, thereby forming a twice reflected image of the reference assembly. The assembly for analysis is viewed through the half-silvered mirror so that a viewer, sees the twice reflected image of the reference assembly superimposed onto the assembly for analysis. By removing the full reflecting surface, the system easily converts to one in which a reference plastic film drawing can be used instead of the reference assembly.