US4922336A
Expired / Lapsed
US
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Three dimensional display system
Assignee: Eastman Kodak Co
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Filing: 1989-09-11
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Granted: 1990-05-01
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Expires: 2009-09-11
Abstract
Abstract A system that is able to display an object in three dimensions and an accompanying method for use therein. Specifically, through this system, a three-dimensional image is displayed as a series of segments, e.g. line segments, formed by intersecting those surfaces of an object that are visible to a viewer with a sequence of pre-defined parallel helical surfaces taken through the object, with substantially the same pitch and axial orientation as that of a rotating helical reflector. Each dot in a resulting segment is then projected through both a focusing lens and an anamorphic lens onto a spatially corresponding portion of the rotating helical reflector. The anamorphic lens, which rotates in unison with the helical reflector, ensures, in conjunction with the focusing lens, that each dot will be focused on a given point along the reflector. By painting each such segment on a different portion of the reflector, the reflector, as it rotates, will sweep out a focused displayed volume. As a result and due to the persistence associated with human vision, a three-dimensional self-radiant "ghost-like" image of the object will appear to be displayed about the central (longitudinal) axis of the reflector. As fewer intersecting segments are painted on each rotation of the reflector, the image will increasingly appear as a "wire-frame" outline of the contours and edges of the object. However, as the number of such segments painted on the reflector increases per each rotation thereof, the three-dimensional image of the object will increasingly appear to "fill in". The displayed image contains appropriate visual information, such as stereoscopic, parallax and focus affects, such that it provides a relatively accurate three-dimensional depiction of the object.
Inventors
- 👤 Roger R. A. Morton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:24
CPC Classifications
G; G09; G09F; G09F19/00; G09F19/12; G09F19/18; G02; G02B; G02B30/00; G02B30/50; G02B30/54; H; H04; H04N; H04N13/00; H04N13/20; H04N13/275; H04N13/279; H04N13/30; H04N13/363; H04N13/366; H04N13/376; H04N13/388; H04N13/393; H04N13/398; H04N13/286; H04N13/289
Claims Analysis
Total Claims: 34
Claim 1
Independent Claim
209 words
A system for generating a three-dimensional display of an object to a viewer comprising: a helical reflector adapted for rotation about its central axis; an anamorphic lens coaxially aligned with and adapted for rotation in unison with said helical reflector; a two-dimensional display arranged to project light therefrom through said anamorphic lens onto said helical reflector; and a display generator means comprising: means, responsive to a database of stored information which contains a three-dimensional description of an object, for determining each successive one in a series of incrementally spaced pre-defined helical sections taken through said object; means, responsive to a current position of a viewer and to said database, for ascertaining those surfaces of the object which, if displayed, would be visible to the viewer; means for determining a series of intersecting segments, wherein each segment in said series occurs as an intersection between a corresponding one of the helical sections and at least one of said visible surfaces of the object; and means for successively and selectively projecting each intersecting segment in said series onto the two-dimensional display in response to a current position of said helical reflector, whereby as said helical reflector rotates the segments projected thereon sweep out a focused three-dimensional volume that depicts the object.
Claim 2
Independent Claim
209 words
A system for generating a three-dimensional display of an object to a viewer comprising: a helical reflector adapted for rotation about its central axis; an anamorphic lens coaxially aligned with and adapted for rotation in unison with said helical reflector; a two-dimensional display arranged to project light therefrom through said anamorphic lens onto said helical reflector; and a display generator means comprising: means, responsive to a database of stored information which contains a three-dimensional description of an object, for determining each successive one in a series of incrementally spaced pre-defined helical sections taken through said object; means, responsive to a current position of a viewer and to said database, for ascertaining those surfaces of the object which, if displayed, would be visible to the viewer; means for determining a series of intersecting segments, wherein each segment in said series occurs as an intersection between a corresponding one of the helical sections and at least one of said visible surfaces of the object; and means for successively and selectively projecting each intersecting segment in said series onto the two-dimensional display in response to a current position of said helical reflector, whereby as said helical reflector rotates the segments projected thereon sweep out a focused three-dimensional volume that depicts the object.
Claim 3
Dependent Claim
57 words
The system in claim 1 further comprising a focusing lens, coaxially aligned with said anamorphic lens and situated in an optical path between said anamorphic lens and said two-dimensional display, which in conjunction with said anamorphic lens focuses light incident thereon from a given point on the two-dimensional display onto a pre-defined point on said helical reflector.
Claim 4
Dependent Claim
23 words
The system in claim 2 wherein each of the helical sections has substantially the same pitch and axial orientation as the helical reflector.
Claim 5
Dependent Claim
18 words
The system in claim 3 wherein the helical reflector is a single turn helix with a constant radius.
Claim 6
Dependent Claim
64 words
The system in claim 2 wherein said anamorphic lens comprises a planar array of individual lenses secured within a common frame wherein individual ones of said lenses possess different magnifying powers based upon the position of the individual one lens in the anamorphic lens and a corresponding vertical spacing between a reflective surface of said helical reflector and a surface of said anamorphic lens.
Claim 7
Dependent Claim
63 words
The system in claim 5 wherein each of said helical sections has substantially the same pitch and axial orientation as the helical reflector and two successive ones of said helical sections of said object have an associated spacing therebetween and referenced to said object that corresponds to spacing between successive corresponding ones of the segments that form a three-dimensional display of the object.
Claim 8
Dependent Claim
18 words
The system in claim 6 wherein the helical reflector is a single turn helix with a constant radius.
Claim 9
Dependent Claim
16 words
The system in claim 7 further comprising means for determining the current position of the viewer.
Claim 10
Dependent Claim
46 words
The system in claim 8 wherein said current position determining means comprises: a video camera for producing video signals of an area containing said viewer; and means for processing said video signals to generate signals containing coordinate information that defines the current position of the viewer.
Claim 11
Dependent Claim
13 words
The system in claim 9 wherein the display generator comprises a graphics workstation.
Claim 12
Dependent Claim
163 words
The system in claim 5 wherein said anamorphic lens further comprises: first ones of said individual lenses contained within a first portion of said planar array, wherein each of said first ones of said individual lenses has a concave shaped cross-section and possesses a magnifying power within a first band of values; second ones of said individual lens contained within a second portion of said planar array, wherein each of said second ones of said individual lenses has a convex shaped cross-section and possesses a magnifying power within a second band of values, said second band spanning larger values than said first band; and third ones of said individual lenses contained within a remaining portion of the reflector, intermediate said first and second portions, wherein each of said third ones of said individual lenses has a relatively flat surface contour and possesses a magnifying power within a third band of values, wherein said third band encompasses values intermediate said first and second bands.
Claim 13
Dependent Claim
20 words
The system in claim 2 wherein said anamorphic lens comprises a single piece of optical material having a continuous surface.
Claim 14
Dependent Claim
21 words
The system in claim 2 wherein each helical section has substantially the same pitch and axial orientation as the helical reflector.
Claim 15
Dependent Claim
45 words
The system in claim 13 wherein two successive ones of said helical sections of said object have an associated spacing therebetween and referenced to said object that corresponds to spacing between successive corresponding ones of the segments that form a three-dimensional display of the object.
Claim 16
Dependent Claim
16 words
The system in claim 2 further comprising means for determining the current position of the viewer.
Claim 17
Dependent Claim
46 words
The system in claim 15 wherein said current position determining means comprises: a video camera for producing video signals of an area containing said viewer; and means for processing said video signals to generate signals containing coordinate information that defines the current position of the viewer.
Claim 18
Dependent Claim
13 words
The system in claim 2 wherein the display generator comprises a graphics workstation.
Claim 19
Dependent Claim
238 words
In a system for generating a three-dimensional display of an object to a viewer comprising a helical reflector adapted for rotation about its central axis; an anamorphic lens coaxially aligned with and adapted for rotation in unison with said helical reflector; a focusing lens, which in conjunction with said anamorphic lens, focuses light incident thereon from a given point on a two-dimensional display onto a pre-defined point on said helical reflector; a two-dimensional display arranged to project light therefrom through said focusing lens and said anamorphic lens onto said helical reflector; a method comprising the steps of: determining, in response to a database of stored information which contains a three-dimensional description of an object, each successive one in a series of incrementally spaced pre-defined helical sections taken through said object; ascertaining, in response to a current position of a viewer and to said database, those surfaces of the object which, if displayed, would be visible to the viewer; determining a series of intersecting segments, wherein each segment in said series occurs as an intersection between a corresponding one of the helical sections and at least one of said visible surfaces of the object; and successively and selectively projecting each intersecting segment in said series onto the two-dimensional display in response to a current position of said helical reflector, whereby as said helical reflector rotates the segments projected thereon sweep out a focused three-dimensional volume that depicts the object.
Claim 20
Dependent Claim
238 words
In a system for generating a three-dimensional display of an object to a viewer comprising a helical reflector adapted for rotation about its central axis; an anamorphic lens coaxially aligned with and adapted for rotation in unison with said helical reflector; a focusing lens, which in conjunction with said anamorphic lens, focuses light incident thereon from a given point on a two-dimensional display onto a pre-defined point on said helical reflector; a two-dimensional display arranged to project light therefrom through said focusing lens and said anamorphic lens onto said helical reflector; a method comprising the steps of: determining, in response to a database of stored information which contains a three-dimensional description of an object, each successive one in a series of incrementally spaced pre-defined helical sections taken through said object; ascertaining, in response to a current position of a viewer and to said database, those surfaces of the object which, if displayed, would be visible to the viewer; determining a series of intersecting segments, wherein each segment in said series occurs as an intersection between a corresponding one of the helical sections and at least one of said visible surfaces of the object; and successively and selectively projecting each intersecting segment in said series onto the two-dimensional display in response to a current position of said helical reflector, whereby as said helical reflector rotates the segments projected thereon sweep out a focused three-dimensional volume that depicts the object.
Claim 21
Dependent Claim
27 words
The method in claim 18 further comprising the step of calculating and storing all of said helical sections prior to generating any portion of said three-dimensional display.
Claim 22
Dependent Claim
16 words
The method in claim 18 wherein the focusing lens is coaxially aligned with said anamorphic lens.
Claim 23
Dependent Claim
23 words
The method in claim 20 wherein each of the helical sections has substantially the same pitch and axial orientation as the helical reflector.
Claim 24
Dependent Claim
18 words
The method in claim 21 wherein the helical reflector is a single turn helix with a constant radius.
Claim 25
Dependent Claim
27 words
The method in claim 22 further comprising the step of calculating and storing all of said helical sections prior to generating any portion of said three-dimensional display.
Claim 26
Dependent Claim
63 words
The method in claim 20 wherein each of said helical sections has substantially the same pitch and axial orientation as the helical reflector and two successive ones of said helical sections of said object have an associated spacing therebetween and referenced to said object that corresponds to spacing between successive corresponding ones of the segments that form a three-dimensional display of the object.
Claim 27
Dependent Claim
18 words
The method in claim 24 wherein the helical reflector is a single turn helix with a constant radius.
Claim 28
Dependent Claim
17 words
The method in claim 25 further comprising the step of determining the current position of the viewer.
Claim 29
Dependent Claim
43 words
The method in claim 26 wherein said current position determining step comprises the steps of: producing video signals of an area containing said viewer; and processing said video signals to generate signals containing coordinate information that defines the current position of the viewer.
Claim 30
Dependent Claim
27 words
The method in claim 27 further comprising the step of calculating and storing all of said helical sections prior to generating any portion of said three-dimensional display.
Claim 31
Dependent Claim
45 words
The method in claim 20 wherein two successive ones of said helical sections of said object have an associated spacing therebetween and referenced to said object that corresponds to spacing between successive corresponding ones of the segments that form a three-dimensional display of the object.
Claim 32
Dependent Claim
17 words
The method in claim 20 further comprising the step of determining the current position of the viewer.
Claim 33
Dependent Claim
43 words
The method in claim 30 wherein said current position determining step comprises the steps of: producing video signals of an area containing said viewer; and processing said video signals to generate signals containing coordinate information that defines the current position of the viewer.
Claim 34
Dependent Claim
27 words
The method in claim 31 further comprising the step of calculating and storing all of said helical sections prior to generating any portion of said three-dimensional display.
References Cited (Backward Citations)
US2189374A
Cited
US3324760A
Cited
US3202985A
Cited
US3428393A
Cited
US3462213A
Cited
US3682553A
Cited
US3956833A
Cited
US4130832A
Cited
US4414565A
Cited
US4294523A
Cited
US4297009A
Cited
US4649425A
Cited
JPS60257695A
Cited
US4737921A
Cited
US4853769A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-04-30 | 1993-10-30 | 1994-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-30 | 1997-10-30 | 1998-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-30 | 2001-10-30 | 2002-05-01 | $7700.00 | Window Closed / Lapsed |