Patent US3683773A successfully refreshed from Google Patents.
US3683773A
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US
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Stereoscopic photography
Assignee: DUDLEY OPTICAL LAB Inc
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Filing: 1968-07-26
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Granted: 1972-08-15
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Expires: 1988-07-26
Abstract
Abstract Stereoscopic photographs, exhibiting the effect of parallax about both horizontal and vertical axes, are recorded on a lenticular film or a lenticular screen-film combination located at the focus of the camera objective, the lenticules on the film or screen having substantially spherical curvature and peripheries with a space-filling configuration, such as square or hexagonal, so oriented that there are no appreciable nonlenticulated areas between adjacent lenticules. Said configuration matches, to a reduced scale, that of an aperture in a plate or diaphragm located in the plane of one of the lens pupils. The characteristics of the lens, the aperture and the lenticles are so coordinated that the elementary image formed at the focus of each lenticule substantially fills the format of that lenticule so that adjacent elementary images are neither appreciable spaced apart nor overlapping. The completed photograph, or a reproduction thereof, exhibits a stereoscopic effect when viewed through the lenticulated surface or through another screen which matches that used in taking the picture. Also disclosed are methods and apparatus for manufacturing such lenticular film and screens, methods of copying the photographs, methods of recording and viewing stereoscopic color photographs on black-and-white stock, and the adaptation of the system to aerial photography and to television.
Inventors
- 👤 Leslie Peter Dudley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:48
CPC Classifications
G; G03; G03B; G03B35/00; G03B35/18; G03B35/24
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
178 words
A stereoscopic photographic system comprising: a primary lens originally having a circular aperture of radius r; an aperture plate located in the plane of one of the lens pupils having an aperture therein with a square or hexagonal peripheral configuration and having a half width s between opposite parallel edges, where s is equal to or less than r/1.4142; a combination multi-element screen and photographic backing means positioned a distance i from said aperture plate, said combination being located substantially at the focus of said lens, the elements of said screen having a square or hexagonal peripheral configuration matching that of the aperture in said aperture plate but on a reduced scale with respect thereto and each element having an acceptance angle of 2 tan 1 s/i, the characteristics of the lens, the aperture and the elements being so coordinated that the elementary image at the focus of each element on the surface of said photographic backing means substantially fills the image format of that element so that adjacent elementary images are neither appreciably spaced apart nor overlapping.
Claim 2
Dependent Claim
178 words
A stereoscopic photographic system comprising: a primary lens originally having a circular aperture of radius r; an aperture plate located in the plane of one of the lens pupils having an aperture therein with a square or hexagonal peripheral configuration and having a half width s between opposite parallel edges, where s is equal to or less than r/1.4142; a combination multi-element screen and photographic backing means positioned a distance i from said aperture plate, said combination being located substantially at the focus of said lens, the elements of said screen having a square or hexagonal peripheral configuration matching that of the aperture in said aperture plate but on a reduced scale with respect thereto and each element having an acceptance angle of 2 tan 1 s/i, the characteristics of the lens, the aperture and the elements being so coordinated that the elementary image at the focus of each element on the surface of said photographic backing means substantially fills the image format of that element so that adjacent elementary images are neither appreciably spaced apart nor overlapping.
Claim 3
Dependent Claim
39 words
The stereoscopic photographic system defined in claim 1, in which said screen comprises a lenticular screen having square or hexagonal lenticules shaped and oriented in a space-filling configuration so that there are no appreciable non-lenticulated areas between adjacent lenticules.
Claim 4
Dependent Claim
16 words
The system claimed in claim 2, wherein the surfaces of said lenticules have substantially spherical curvature.
Claim 5
Dependent Claim
34 words
The system as claimed in claim 1, wherein said multi-element screen comprises a pair of cylindrically lenticulated screens extending at right-angles to one another with the lenticulated surfaces thereof in contact with one another.
Claim 6
Dependent Claim
39 words
The system defined in claim 1, in which said multi-element screen comprises a member of opaque material having apertures therein of the same configuration as the aperture in said aperture plate but on a reduced scale with respect thereto.
Claim 7
Dependent Claim
52 words
The system as claimed in claim 2, wherein said combination is a composite unit, said light-sensitive backing means being a photographic film comprising a transparent base, one surface of which carries light-sensItive emulsion, said lenticules being formed on the surface of the film base opposite that surface which carries the light-sensitive emulsion.
Claim 8
Dependent Claim
22 words
The system as claimed in claim 2, wherein said combination comprises a photographic member and a separate lenticular screen adjacent said member.
Claim 9
Dependent Claim
23 words
The system as claimed in claim 1, in which said aperture plate is located in the plane normally occupied by an iris diaphragm.
Claim 10
Dependent Claim
30 words
The system as claimed in claim 2, wherein the lenticules of said lenticular screen are defined by square peripheries, and said aperture in said aperture plate has a square periphery.
Claim 11
Dependent Claim
30 words
The system as claimed in claim 2, wherein the lenticules of said lenticular screen are defined by hexagonal peripheries, and said aperture in said aperture plate has a hexagonal periphery.
Claim 12
Dependent Claim
82 words
The system as claimed in claim 1, wherein said aperture plate includes color filters so that the area of the imagery occupying the format of each lenticule is subdivided into smaller areas corresponding in respect of number and shape to the filters in the aperture plate, thereby causing the gray scale of the associated portions of the imagery formed on the light-sensitive backing means to be modulated according to the amount of light transmitted by the corresponding filters in the aperture plate.
Claim 13
Dependent Claim
51 words
The system defined in claim 11, in which the photographic backing means comprises a black-and-white transparency, and which includes a light source positioned to direct light through said lens and color filters to said transparent combination, and which includes a multi-element screen positioned between an observer and the aforesaid transparent combination.
Claim 14
Dependent Claim
19 words
The system as claimed in claim 1, wherein the size of the aperture in said aperture plate is adjustable.
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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) | 1975-08-15 | 1976-02-14 | 1976-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-15 | 1980-02-14 | 1980-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-15 | 1984-02-14 | 1984-08-15 | $7700.00 | Window Closed / Lapsed |