Method of holographically forming a three-dimensional image from a sequence of two-dimensional images of different perspective

Claim 1

A method of forming a three-dimensional image from a sequence of two-dimensional images of an object from different perspectives, comprising the steps of recording a plurality of discrete two-dimensional shadow images of an object on a recording medium located in a plane with a source of penetrating radiation, each said image being formed with the source in a different position, a set of first imaginary lines, one first imaginary line passing through each source position and through a predetermined point of said object, each first imaginary line making an acute angle with a second imaginary line perpendicular to said recording plane and passing through said predetermined point of said object, removing the object and the source, subsequently placing a lens at positions corresponding to each of said source positions, locating the recorded shadow image corresponding to each of said positions at locations wherein the lens focusses two-dimensional secondary images of said recorded images on a given point on said second imaginary line with a depth of focus corresponding to the lens aperture and so as to define a set of third imaginary lines, one third imaginary line passing through each lens position, each corresponding recorded shadow image location, and said given point, each third imaginary line making the same angle with said second imaginary line as the corresponding one of said first imaginary lines makes with said second imaginary line, illuminating each recorded shadow image with coherent radiation, placing a holographic recording medium in the path of the third imaginary lines on a side of the lens remote from the recorded shadow images, additionally illuminating the holographic recording medium with a coherent beam of reference radiation thereby holographically recording each recorded shadow image, and reconstructing the resulting holograms with a beam substantially identical with the reference beam used for recording whereby the individual images holographically reconstructed form an apparent three-dimensional image that is sharply focussed in a plane passing through said given point on said second imaginary line.

Claim 2

A method of forming a three-dimensional image from a sequence of two-dimensional images of an object from different perspectives, comprising the steps of recording a plurality of discrete two-dimensional shadow images of an object on a recording medium located in a plane with a source of penetrating radiation, each said image being formed with the source in a different position, a set of first imaginary lines, one first imaginary line passing through each source position and through a predetermined point of said object, each first imaginary line making an acute angle with a second imaginary line perpendicular to said recording plane and passing through said predetermined point of said object, removing the object and the source, subsequently placing a lens at positions corresponding to each of said source positions, locating the recorded shadow image corresponding to each of said positions at locations wherein the lens focusses two-dimensional secondary images of said recorded images on a given point on said second imaginary line with a depth of focus corresponding to the lens aperture and so as to define a set of third imaginary lines, one third imaginary line passing through each lens position, each corresponding recorded shadow image location, and said given point, each third imaginary line making the same angle with said second imaginary line as the corresponding one of said first imaginary lines makes with said second imaginary line, illuminating each recorded shadow image with coherent radiation, placing a holographic recording medium in the path of the third imaginary lines on a side of the lens remote from the recorded shadow images, additionally illuminating the holographic recording medium with a coherent beam of reference radiation thereby holographically recording each recorded shadow image, and reconstructing the resulting holograms with a beam substantially identical with the reference beam used for recording whereby the individual images holographically reconstructed form an apparent three-dimensional image that is sharply focussed in a plane passing through said given point on said second imaginary line.