OPTICAL SYSTEM FOR VISUAL ANALYSIS OF TWO ASSEMBLIES BY SUPERIMPOSING OF AN IMAGE ONTO AN ASSEMBLY

摘要

TITLE AN OPTICAL SYSTEM FOR VISUAL ANALYSIS OF TWO ASSEMBLIES BY SUPERIMPOSING OF AN IMAGE ONTO AN ASSEMBLY 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.