Abstract

Two new rainbow holograms avoid the viewing limitations of the slit-master rainbow hologram. These two holograms are the rainbow-master rainbow hologram and the ring-master rainbow hologram. Both holograms are displayed horizontally while white light is reilluminated from directly above or below. The rainbow viewing window of the ring-master rainbow hologram is a truncated cone shape which hovers above and around the horizontal holographic image. This allows for 360° viewing. The rainbow-master rainbow hologram exhibits the same properties with a 180° viewing window. As with the slit-master rainbow hologram, the ring and rainbow shaped H1 master holograms are simple laser transmission holograms. Holographic table geometries for two-step ring and rainbow-master rainbow holograms have been developed for translucent and opaque objects. Multiple-exposure pseudocolor encoding may be used to enhance display work or to color tag concentric zones of information in optical processing systems.

© 1987 Optical Society of America