Multilayer 3-D display by multidirectional beam splitter

This paper describes a method of displaying 3-D images composed of several layers. Each layer image is placed at a different optical path length position from a viewing window and stacked by a multidirectional beam splitter to synthesize a composite 3-D image. Each layer image is overlapped at the corresponding depth. This display presents a real 3-D image and is fitted to show serial sectional images, multilayer wiring diagram, piping diagram, etc.