Patent US4478639A successfully refreshed from Google Patents.
US4478639A
Expired / Lapsed
US
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Method for stereoscopic photography
Assignee: Three Dimensional Photography Corp
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Filing: 1977-12-27
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Granted: 1984-10-23
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Expires: 1997-12-27
Abstract
Abstract An apparatus and method of producing a parallax stereogram, i.e., free vision stereogram, and particularly for the accurate registration of a plurality of film images in order to ensure stereographic reproduction. The images on a film strip are optically viewed to establish homologous points for each film frame image. In one embodiment two images are optically superimposed to establish a stereo base distance. Each film frame is marked in accordance with the homologous points or stereo base distance. The marking may be mechanical or optically generated. Each film frame is thereafter aligned or sensed while in an enlarger, the marks establishing the accurate registration of eaach frame. Each film frame is exposed onto a photosensitive material using a movable line grid. A lenticular screen is superimposed over the developed picture to form the stereoscopic photograph.
Inventors
- 👤 Edgar C. Smith
- 👤 James B. Campbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:19
CPC Classifications
G; G03; G03B; G03B35/00; G03B35/14; Y; Y10; Y10S; Y10S430/00; Y10S430/152; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802
Claims Analysis
Total Claims: 64
Claim 1
Independent Claim
94 words
A method for processing a plurality of film frames in excess of two for use in sterogram each frame having an image of the same subject, comprising the steps of establishing a stereo base by measuring the center to center distance between identical points in a selected pair of the film frame images, and marking each film frame or image with a mark according to the stereo base by dividing the stereo base by the number of the plurality of film frame images minus one in order to determine the location of the mark.
Claim 2
Independent Claim
94 words
A method for processing a plurality of film frames in excess of two for use in sterogram each frame having an image of the same subject, comprising the steps of establishing a stereo base by measuring the center to center distance between identical points in a selected pair of the film frame images, and marking each film frame or image with a mark according to the stereo base by dividing the stereo base by the number of the plurality of film frame images minus one in order to determine the location of the mark.
Claim 3
Dependent Claim
27 words
A method according to claim 1 wherein the film image is a continuous strip of simultaneously exposed film, the exposure time for each image being substantially equal.
Claim 4
Dependent Claim
22 words
A method according to claim 1 wherein the stereo base is determined by optical superimposition of the selected pair of film images.
Claim 5
Dependent Claim
26 words
A method according to claim 2 wherein the stereo base is determined according to the visual appearance of the pair of film images when optically superimposed.
Claim 6
Dependent Claim
17 words
A method according to claim 1 wherein the selecting of the two points determines an aim point.
Claim 7
Dependent Claim
20 words
A method according to claim 1 wherein the selected pair of film images is the first and last image frames.
Claim 8
Dependent Claim
19 words
A method according to claim 1 wherein the marking of the frame of each film image is performed sequentially.
Claim 9
Dependent Claim
21 words
A method according to claim 1 wherein the marking is performed by advancing the film frame images to a marking means.
Claim 10
Dependent Claim
21 words
A method according to claim 2 wherein the marking is performed by advancing the film frame images to a marking means.
Claim 11
Dependent Claim
21 words
A method according to claim 7 wherein the marking is performed by advancing the film frame images to a marking means.
Claim 12
Dependent Claim
12 words
A method according to claim 1 wherein the marking is accomplished mechanically.
Claim 13
Dependent Claim
21 words
A method according to claim 11 wherein the marking is accomplished by a punch in each frame of the film image.
Claim 14
Dependent Claim
22 words
A method according to claim 1 wherein the marking is accomplished by removing a portion of each frame of the film image.
Claim 15
Dependent Claim
22 words
A method according to claim 1 wherein the marking is accomplished by changing the opacity of the frame of each film image.
Claim 16
Dependent Claim
12 words
A method according to claim 1 wherein the marking is accomplished optically.
Claim 17
Dependent Claim
29 words
A method according to claim 15 wherein the marking is accomplished by a laser removing an emulsion portion of the photosensitive material of each frame of the film image.
Claim 18
Dependent Claim
27 words
A method according to claim 15 wherein the marking adds base density to the emulsion portion of the photosensitive material of each frame of the film image.
Claim 19
Dependent Claim
28 words
A method according to claim 1 wherein each frame of the film is marked a distance from any other frame as a multiple of the desired stereo base.
Claim 20
Dependent Claim
12 words
A method according to claim 1 wherein there is seven film images.
Claim 21
Dependent Claim
12 words
A method according to claim 18 wherein there is seven film images.
Claim 22
Dependent Claim
23 words
A method according to claim 1 wherein the marks are used to locate and project each film frame for printing onto photosensitive material.
Claim 23
Dependent Claim
17 words
A method according to claim 21 wherein the same size image on each film frame is printed.
Claim 24
Dependent Claim
15 words
A method according to claim 21 wherein the print is mounted in an optical viewer.
Claim 25
Dependent Claim
21 words
A method according to claim 23 wherein the optical viewer is a transparent member having a plurality of parallel lenticular elements.
Claim 26
Dependent Claim
20 words
A method according to claim 24 wherein each lenticular element is superimposed on a portion of each printed film image.
Claim 27
Dependent Claim
17 words
A method according to claim 25 wherein the portion is determined by the number of film images.
Claim 28
Dependent Claim
26 words
A method according to claim 25 wherein the portion is determined by dividing the base width of each lenticular element by the number of film images.
Claim 29
Independent Claim
85 words
A method for processing a plurality of film frames in excess of two for use in a sterogram, each film frame having an image of the same subject, comprising the steps of selecting a first point in a selected film frame image, marking the selected film frame or image with a mark according to the selected point, selecting homologous points in each of the plurality of film frame images, and marking each film frame or image, with a respective mark according to the homologous points.
Claim 30
Independent Claim
85 words
A method for processing a plurality of film frames in excess of two for use in a sterogram, each film frame having an image of the same subject, comprising the steps of selecting a first point in a selected film frame image, marking the selected film frame or image with a mark according to the selected point, selecting homologous points in each of the plurality of film frame images, and marking each film frame or image, with a respective mark according to the homologous points.
Claim 31
Dependent Claim
23 words
A method according to claim 28 wherein the marks are used to locate and project each film frame for printing onto photosensitive material.
Claim 32
Dependent Claim
15 words
A method according to claim 29 wherein the print is mounted in an optical viewer.
Claim 33
Dependent Claim
18 words
A method according to claim 28 wherein the plurality of film frame images are in a continuous strip.
Claim 34
Dependent Claim
23 words
A method according to claim 28 wherein the film images are simultaneously exposed film, the exposure time for each image being substantially equal.
Claim 35
Dependent Claim
51 words
A method according to claim 28 wherein a first homologous point is determined from a selected film frame image, fixing the location and position of the first homologous point, and sequentially advancing the strip to select the homologous point for each subsequent film frame image according to the first homologous point.
Claim 36
Dependent Claim
24 words
A method according to claim 28 wherein the center to center distance between a selected homologous point on each film frame image is equal.
Claim 37
Dependent Claim
17 words
A method according to claim 28 wherein the selecting of an homologous points determines the aim point.
Claim 38
Dependent Claim
18 words
A method according to claim 33 wherein the selecting of an first homologous point determines the aim point.
Claim 39
Dependent Claim
19 words
A method according to claim 28 wherein the marking of the frame of each film image is performed sequentially.
Claim 40
Dependent Claim
21 words
A method according to claim 28 wherein the marking is performed by advancing the film frame images to a marking means.
Claim 41
Dependent Claim
12 words
A method according to claim 28 wherein the marking is accomplished mechanically.
Claim 42
Dependent Claim
22 words
A method according to claim 39 wherein the marking is accomplished by a punch in each frame of the film frame image.
Claim 43
Dependent Claim
22 words
A method according to claim 28 wherein the marking is accomplished by removing a portion of each frame of the film image.
Claim 44
Dependent Claim
22 words
A method according to claim 28 wherein the marking is accomplished by changing the opacity of the frame of each film image.
Claim 45
Dependent Claim
12 words
A method according to claim 28 wherein the marking is accomplished optically.
Claim 46
Dependent Claim
29 words
A method according to claim 43 wherein the marking is accomplished by a laser removing an emulsion portion of the photosensitive material of each frame of the film image.
Claim 47
Dependent Claim
27 words
A method according to claim 43 wherein the marking adds base density to the emulsion portion of the photosensitive material of each frame of the film image.
Claim 48
Dependent Claim
30 words
A method according to claim 28 wherein each frame of the film is marked a distance from any other frame as a multiple of the distance between the homologous points.
Claim 49
Dependent Claim
30 words
A method according to claim 33 wherein each frame of the film is marked a distance from any other frame as a multiple of the distance between the homologous points.
Claim 50
Dependent Claim
12 words
A method according to claim 28 wherein there are seven film images.
Claim 51
Dependent Claim
17 words
A method according to claim 29 wherein the same size image on each film frame is printed.
Claim 52
Dependent Claim
21 words
A method according to claim 30 wherein the optical viewer is a transparent member having a plurality of parallel lenticular elements.
Claim 53
Dependent Claim
20 words
A method according to claim 50 wherein each lenticular element is superimposed on a portion of each printed film image.
Claim 54
Dependent Claim
17 words
A method according to claim 51 wherein the portion is determined by the number of film images.
Claim 55
Dependent Claim
26 words
A method according to claim 51 wherein the portion is determined by dividing the base width of each lenticular element by the number of film images.
Claim 56
Dependent Claim
7 words
A product of the method claim 1.
Claim 57
Dependent Claim
9 words
A product according to the method of claim 28.
Claim 58
Dependent Claim
9 words
A product according to the method of claim 29.
Claim 59
Dependent Claim
9 words
A product according to the method of claim 21.
Claim 60
Dependent Claim
9 words
A product according to the method of claim 30.
Claim 61
Dependent Claim
9 words
A product according to the method of claim 23.
Claim 62
Dependent Claim
9 words
A product according to the method of claim 2.
Claim 63
Dependent Claim
9 words
A product according to the method of claim 11.
Claim 64
Dependent Claim
9 words
A product according to the method of claim 15.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-10-23 | 1988-04-23 | 1988-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-23 | 1992-04-23 | 1992-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-23 | 1996-04-23 | 1996-10-23 | $7700.00 | Window Closed / Lapsed |