Abstract
This paper describes a method for finding intersecting lines with optically constructed more then two solid bodies, where a special Moiré technique, named ODAKA-NAGAE Method, is developed. The used apparatus works as follows; (1) Shadow of an equispaced plane grating is projected on an object A from a projector through a 50% transparent-50% refrective half mirror, where equivalent shadow is also projected onto an object B. (2) When the ob-ject B is observed through the half mirror from a proper location so that the image of the object A is overlapped uppon the object B, the optically constructed bodies make an unique Moiré fringes. (3) This resulting Moiré gives the intersecting line of the bodies, if the experimental processing is properly handled to meet the analysis of the authors. The principle and some experimental results to verify the theory are shortly described.
