US3740457A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reproduction of multicolour scenes and prints in multicolour television
Assignee: Agfa Gevaert NV
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Filing: 1969-03-12
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Granted: 1973-06-19
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Expires: 1989-03-12
Abstract
Abstract A process of electronically reproducing for television transmittal by conventional reproduction and transmittal equipment multicolor photographic film which has an overall optical contrast or gamma within the range of 0.5-0.7 so that conventional electronic modification of the electronic signal can be omitted.
Inventors
- 👤 L Meeussen
- 👤 R Huybrechts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:40
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/3041
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
116 words
A process of television transmission which comprises the steps of: (1) photographically reproducing the original scene to be televised by means of multicolor photographic film to give positive multicolor photographic images of said scene having an overall optical contrast within the range of 0.45-0.7 gamma value, (2) converting said positive multicolor photographic images in said multicolor photographic film into an electronic signal having an intensity generally corresponding to the optical contrast of the various areas of said image, (3) amplifying the electronic signals thus produced, and (4) transmitting said signals for reception and translation into a visible picture by a television receiver, said signals being converted and amplified without electronic modification of the relative intensities thereof.
Claim 2
Dependent Claim
116 words
A process of television transmission which comprises the steps of: (1) photographically reproducing the original scene to be televised by means of multicolor photographic film to give positive multicolor photographic images of said scene having an overall optical contrast within the range of 0.45-0.7 gamma value, (2) converting said positive multicolor photographic images in said multicolor photographic film into an electronic signal having an intensity generally corresponding to the optical contrast of the various areas of said image, (3) amplifying the electronic signals thus produced, and (4) transmitting said signals for reception and translation into a visible picture by a television receiver, said signals being converted and amplified without electronic modification of the relative intensities thereof.
Claim 3
Dependent Claim
28 words
A process according to claim 1, wherein the optical contrast of said photographic images, measured in terms of log opacity difference, is within the range 1.0 to 1.35.
Claim 4
Dependent Claim
23 words
A process according to claim 1, wherein said multicolor image records a scene of which the subject contrast is not less than 40:1.
Claim 5
Dependent Claim
56 words
A process according to claim 1, wherein the said multicolor image is produced by recording the desired scene on a negative silver halide multicolor recording material and printing the negative record on a positive silver halide multicolor printing material, the negative and positive materials yielding an image having an overall gamma value between 0.45 and 0.70.
Claim 6
Dependent Claim
38 words
A process according to claim 1 wherein the said multicolor image is produced by recording the scene on a silver halide multicolor reversal material having color-sensitive layers yielding images having an overall gamma value between 0.45 and 0.70.
Claim 7
Dependent Claim
37 words
A process according to claim 1, wherein the said multicolor image is produced by printing a positive multicolor picture on a silver halide multicolor reversal material, said image having an overall gamma value between 0.45 and 0.70.
Claim 8
Dependent Claim
33 words
A process according to claim 1, wherein the said multicolor image is produced by an imbibition printing process in such a way that the image has an overall gamma between 0.45 and 0.70.
Claim 9
Dependent Claim
27 words
A process according to claim 1 wherein said film is a motion picture film formed of a series of frames each carrying a multicolor photographic image thereon.
Claim 10
Dependent Claim
27 words
The process of claim 1, wherEin said photographic images are converted into electronic signals by optically projecting the film carrying the images on a television camera tube.
Claim 11
Dependent Claim
37 words
The process of claim 1 wherein said photographic images are converted into electronic signals by optically scanning the film carrying said images with a flying spot scanner and receiving the light signal thus produced on a phototube.
Claim 12
Dependent Claim
27 words
A process according to claim 1, wherein the said multicolor image is produced in a light-sensitive color material in which at least one mask image is formed.
Claim 13
Dependent Claim
20 words
A process according to claim 11, wherein each such mask image is or produced by a colored color coupler system.
Claim 14
Dependent Claim
33 words
A process according to claim 11, wherein the said multicolor image comprises integrally masked cyan and magenta color part images, the masks having been formed from colorless color couplers and colorless mask formers.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-18 | 1976-12-18 | 1977-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-18 | 1980-12-18 | 1981-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-18 | 1984-12-18 | 1985-06-19 | $7700.00 | Window Closed / Lapsed |