Back to results
US 5,748,347 AGranted
Image recording medium and method of making same
AssigneeHologram Technology International, Inc.
InventorRonald R. Erickson
Life of this patent
Estimating the term…
Abstract
A product, method, and apparatus are provided for making a stereoscopic hologram from a series of two-dimensional views of an object. The two-dimensional views are obtained from, for example, computer analysis of scans taken by standard medical diagnostic equipment. The views are reproduced on an LCD screen, and the screen then serves as the modulator of the holographic object beam. An exposure of each view is sequentially made on a different section of a holographic recording medium, which may be, for example, a photopolymer placed on a substrate. As the observer views the finished product, each eye looks at a different section of the hologram, thus providing a stereoscopic effect.
Claims73
A method of making a holographic stereogram, comprising the steps of holographically recording on a section of an undeveloped layer of a recording medium through a mask a plurality of two-dimensional images from three-dimensional image data, each of said images corresponding to a view of an object at a particular angular orientation;
- rotationally displacing an object beam carrying one of said images to correspond to a location of said mask, a location of said object beam corresponding to a location of a reference beam;
- pre-distorting said object beam, said pre-distorting step including transforming a cross-section of said object beam substantially into a first predetermined shape and first orientation at a first distance from said image after being incident on said image, and transforming a cross-section of said object beam substantially into at least a second predetermined shape and at least a second orientation at at least a second distance from said image after being incident on said image;
- and correlating a location of said mask to said angular orientation of said image in said object beam with respect to a normal plane of reference.
A method of making a recording by which a stereoscopic hologram of an object may be displayed, comprising the steps of:
- a. generating a plurality of different two-dimensional images from three-dimensional image data of said object, each of said images corresponding to a view of said object at a particular angular orientation;
- b. displaying one of said images, said image corresponding to said angular orientation of its respective view, wherein a plurality of points on said image display are included within a plane separating a first area from a second area;
- c. providing a reference beam and an object beam, said object beam rotatable about an axis perpendicular to an object beam axis, and proceeding in a direction from said first area to said second area;
- d. pre-distorting said object beam, said pre-distorting step including transforming a cross-section of said object beam substantially into a first predetermined shape and a first orientation at a first distance from said image display within said second area, and transforming the cross-section of said object beam substantially into at least a second predetermined shape and at least a second orientation at at least a second distance from said image display within said second area;
- e. holographically recording, via an interference of said reference beam and said object beam, said image on a section of an undeveloped layer of a recording medium, said section having a width such that light representing a particular view of said object being so imaged lies within an angle subtended by said section, and substantially no light representing other views of said object being so imaged lies within said angle subtended by said section;
- f. rotating said object beam and said image display about said rotatable axis and repeating steps (b)-(e) for each of said images, said recording performed in different sections of said recording medium;
- and
- g. developing said medium.
5 more elements
A method of making a recording by which a stereoscopic hologram of an object may be displayed, comprising the steps of:
- a. generating a plurality of different two-dimensional images from three-dimensional image data of said object, each of said images corresponding to a view of said object at a particular angular orientation;
- b. displaying one of said images, said image corresponding to said angular orientation of its respective view;
- c. providing a reference beam and an object beam, said object beam rotatable about an axis perpendicular to an object beam axis;
- d. pre-distorting said object beam, said pre-distorting step including transforming a cross-section of said object beam substantially into a first predetermined shape and first orientation at a first distance from said image display after being incident on said image display, and transforming a cross-section of said object beam substantially into at least a second predetermined shape and at least a second orientation at at least a second distance from said image display after being incident on said image display;
- e. holographically recording, via an interference of said reference beam and said object beam, said image on a section of an undeveloped layer of a recording medium, said section having a width such that light representing a particular view of said object being so imaged lies within an angle subtended by said section, and substantially no light representing other views of said object being so imaged lies within said angle subtended by said section;
- f. rotating said object beam and said image display about said rotatable axis and repeating steps (b)-(e) for each of said images, said recording performed in different sections of said recording medium;
- and
- g. developing said medium, wherein each of said sections extends in a first direction corresponding to a field of view of said object with a first parallax, and each of said sections extends in a second direction, non-parallel to said first direction, corresponding to a field of view of said object with a second parallax, whereby a matrix of holographic views extending in said first and second directions are disposed on said medium and present a full parallax view when viewed during rotation of said medium in two directions non-parallel to each other.
5 more elements
A method for making a recording by which a stereoscopic holographic image of an object may be displayed, comprising the steps of:
- a. providing a reference beam from a laser incident on a section of a recording medium on a film which is not covered by a mask;
- b. providing an object beam from said laser, said object beam incident on a screen before being incident on said section of said recording medium;
- c. pre-distorting said object beam, said pre-distorting step including transforming a cross-section of said object beam substantially into a first predetermined shape and first orientation at a first distance from said screen after being incident on said screen, and transforming the cross-section of said object beam substantially into at least a second predetermined shape and at least a second orientation at at least a second distance from said screen after being incident on said screen;
- d. moving said mask on said medium such that a previously covered section of said medium is uncovered;
- e. altering said screen such that said screen corresponds to a different view of said object;
- f. rotating said object beam and said screen in a direction such that said object beam is incident on said section of said medium so uncovered;
- and
- g. successively repeating steps (a)-(f) for a plurality of different views of said object.
5 more elements
A method for making a recording by which a stereoscopic holographic image of an object may be displayed, comprising the steps of:
- a. providing a reference beam from a laser incident on a section of a recording medium on a film which is not covered by a mask;
- b. providing an object beam from said laser, said object beam incident on a screen before being incident on said section of said recording medium;
- c. passing said object beam through a holographic optical element prior to said object beam's incidence on said screen, said holographic optical element pre-distorting said object beam, said pre-distortion including transforming a cross-section of said object beam substantially into a first predetermined shape and first orientation at a first distance from said screen after being incident on said screen, and transforming a cross-section of said object beam substantially into at least a second predetermined shape and at least a second orientation at at least a second distance from said screen after being incident on said screens;
- d. moving said mask on said medium such that a previously covered section of said medium is uncovered;
- e. altering said screen such that said screen corresponds to a different view of said object;
- f. rotating said object beam and said screen in a direction such that said object beam is incident on said section of said medium so uncovered;
- and
- g. successively repeating steps (a)-(f) for a plurality of different views of said object.
5 more elements
A method for making a recording by which a stereoscopic holographic image of an object may be displayed, comprising the steps of:
- a. providing a reference beam from a laser incident on a section of a recording medium on a film which is not covered by a mask;
- b. providing an object beam from said laser, said object beam incident on a screen before being incident on said section of said recording medium;
- c. passing said object beam through an optical system prior to said object beam's incidence on said screen, wherein said optical system pre-distorts said object beam and said pre-distortion includes transforming a cross-section of said object beam substantially into a first predetermined shape and first orientation at a first distance from said screen after being incident on said screen, and transforming a cross-section of said object beam substantially into at least a second predetermined shape and at least a second orientation at at least a second distance from said screen after being incident on said screen;
- d. moving said mask on said medium such that a previously covered section of said medium is uncovered;
- e. altering said screen such that said screen corresponds to a different view of said object;
- f. rotating said object beam and said screen in a direction such that said object beam is incident on said section of said medium so uncovered;
- and
- g. successively repeating steps (a)-(f) for a plurality of different views of said object.
5 more elements
A recording by which a stereoscopic holographic image of an object may be displayed, comprising:
- a film;
- a recording medium on said film, said medium capable of photographic development to secure a diffraction pattern incident thereon, said diffraction pattern formed by an interference of an object beam and a reference beam, wherein said object beam is pre-distorted and said pre-distortion includes transforming a cross-section of said object beam substantially into a first predetermined shape and first orientation at a first distance from said object after being incident on said object, and transforming a cross-section of said object beam substantially into at least a second predetermined shape and at least a second orientation at at least a second distance from said object after being incident on said object;
- and
- a plurality of sections of said medium, each section including a diffraction pattern corresponding to a different view of said object, each section formed by said interference of said object beam and said reference beam wherein said object beam is incident upon said recording medium at a different angle for each pair of adjacent sections;
- such that a left eye of a viewer receives a first view from a first section and a right eye of a viewer receives a second view from a second section.
2 more elements
An apparatus for manufacturing a recording of a stereographic holographic image of an object, comprising:
- a laser;
- a beamsplitter for splitting light from said laser into a first component and a second component;
- a screen for displaying an image of an object, said screen modulating an amplitude and phase of said first component of light;
- a first optical system accepting said first component of light from said laser, pre-distorting said first component of light from said laser, said pre-distortion including transforming a cross-section of said first component of light from said laser substantially into a first predetermined shape and first orientation at a first distance from said screen after being incident on said screen, and transforming a cross-section of said first component of light from said laser substantially into at least a second predetermined shape and at least a second orientation at at least a second distance from said screen after being incident on said screen, and outputting said first component of light so pre-distorted;
- and
- a second optical system for transmitting said second component of light such that said second component of light interferes with said first component of light.
3 more elements
An apparatus for manufacturing a recording of a stereographic holographic image of an object, comprising:
- a laser;
- a beamsplitter for splitting light from said laser into a first component and a second component;
- an holographic optical element accepting said first component of light from said laser, said holographic optical element transforming a cross-section of said first component of light from said laser substantially into a first predetermined shape and first orientation at a first distance from said screen after being incident on said screen, and transforming a cross-section of said first component of light from said laser substantially into at least a second predetermined shape and at least a second orientation at at least a second distance from said screen after being incident on said screen, and outputting said first component of light from said laser so transformed;
- a screen for displaying an image of an object, said screen modulating an amplitude and phase of said first component of light from said laser;
- and
- an optical system for transmitting said second component of light from said laser such that said second component of light from said laser interferes with said first component of light from said laser.
3 more elements
An apparatus for manufacturing a recording of a stereographic holographic image of an object, comprising:
- a laser;
- a beamsplitter for splitting light from said laser into a first component and a second component;
- a first optical system accepting said first component of light from said laser, transforming said first component of light from said laser, and outputting said first component of light from said laser so transformed;
- a screen for displaying an image of an object, said screen modulating an amplitude and phase of said first component of light from said laser;
- a holographic optical element accepting said transformed first component of light from said laser, pre-distorting said transformed first component of light from said laser, said pre-distortion including modifying a cross-section of said transformed first component of light from said laser substantially into a first predetermined shape and first orientation at a first distance from said screen after being incident on said screen, and modifying a cross-section of said transformed first component of light from said laser substantially into at least a second predetermined shape and at least a second orientation at at least a second distance from said screen after being incident on said screen, and outputting said transformed first component of light from said laser so pre-distorted;
- and
- a second optical system for transmitting said second component of light from said laser such that said second component of light from said laser interferes with said first component of light from said laser.
4 more elements
Dependencies are inferred from the claim text.