Hologram projector

Abstract

A projector for casting the image of a section of an object recorded on a hologram includes a laser for illuminating a section of the hologram and a lens for focusing a section of the reconstructed virtual image on a screen. The hologram is formed as a cylindrical section surrounding the object, on film, and is stored on a pair of parallel spools. A coherent light beam illuminates a section of the hologram arrayed between the spools and an adjustment mechanism which moves an optical element in the reconstructing beam path and the projecting lens allows adjustment of the illuminated section along an axis parallel to the spools. The projecting lens assembly has an adjustable focal length allowing it to project images at varying depths of the resultant virtual image. The projected image of a section of the object may be changed by rotating the reels to give the effect of viewing the object from differing angles or changing the height of the illuminated section to give the illusion of viewing the object from different heights.

Dependencies are inferred from the claim text.