Patent US3558807A successfully refreshed from Google Patents.
US3558807A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color video pickup system with means for generating a frequency modulated indexing signal higher in frequency than the video information
Assignee: Sony Corp
•
Filing: 1968-06-04
•
Granted: 1971-01-26
•
Expires: 1988-06-04
Abstract
Abstract In a color video signal generating apparatus in which a filter having regions respectively selecting light of different wavelength ranges and a screen having separating lenses are optically interposed between an object to be televised and a single image pickup tube to cause such separating lenses to coact with the filter in dividing an image of the object into color components which are projected onto said tube in such manner that said color components when successively encountered in the line scanning direction can respectively become chrominance signals having a predetermined color subcarrier frequency and being of the same frequency band, there are provided index image forming means to form index images on the image pickup tube which, when successively encountered in the line scanning direction, produce in the tube output frequency or angle modulated index signals having a carrier frequency which bears a predetermined relationship to the color subcarrier frequency and a frequency band which is different than the frequency band of the chrominance signals, and the positions of the respective color components in the chrominance signals are indicated by the index signals to permit the extraction from the tube output of color video signals.
Inventors
- 👤 Hiromichi Kurokawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:22
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/01
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
225 words
A color video signal-generating apparatus comprising image pickup means having scanning means and being operative to photoelectrically convert light projected onto said image pickup means into an electrical output composed of successive signals corresponding to the intensities of light successively encountered by said scanning means in a line scanning direction, filter means interposed optically between an object to be televised and said image pickup means, said filter means having several regions respectively selecting light of different wavelength ranges, a screen interposed between said filter means and said image pickup means, said screen coacting with said filter means for dividing an image of the object into respective color components which are projected onto said image pickup means to produce in said output respective chrominance signals having a predetermined color subcarrier frequency and the same frequency band, index image-forming means for forming index images on said image pickup means which, when encountered in said line-scanning direction, produce in said output angle modulated index signals having a carrier frequency which bears a predetermined relationship with said color subcarrier frequency and having a frequency band which is different than the frequency band of said chrominance signals, and means employing said index signals to identify said chrominance signals corresponding to the respective color components and being operative to extract color video signals from the output of said image pickup means.
Claim 2
Dependent Claim
225 words
A color video signal-generating apparatus comprising image pickup means having scanning means and being operative to photoelectrically convert light projected onto said image pickup means into an electrical output composed of successive signals corresponding to the intensities of light successively encountered by said scanning means in a line scanning direction, filter means interposed optically between an object to be televised and said image pickup means, said filter means having several regions respectively selecting light of different wavelength ranges, a screen interposed between said filter means and said image pickup means, said screen coacting with said filter means for dividing an image of the object into respective color components which are projected onto said image pickup means to produce in said output respective chrominance signals having a predetermined color subcarrier frequency and the same frequency band, index image-forming means for forming index images on said image pickup means which, when encountered in said line-scanning direction, produce in said output angle modulated index signals having a carrier frequency which bears a predetermined relationship with said color subcarrier frequency and having a frequency band which is different than the frequency band of said chrominance signals, and means employing said index signals to identify said chrominance signals corresponding to the respective color components and being operative to extract color video signals from the output of said image pickup means.
Claim 3
Dependent Claim
36 words
A color video signal-generating apparatus as in claim 1, wherein index image-forming means projects said index images through said screen so as to be superimposed on said color components into which said object image is divided.
Claim 4
Dependent Claim
36 words
A color video signal-generating apparatus as in claim 1, wherein the frequency of said index images on the image pickup means varies gradually in said line-scanning direction for achieving the angle modulation of said index signals.
Claim 5
Dependent Claim
77 words
A color video signal-generating apparatus as in claim 1, wherein said screen comprises spaced, separating lenses for the coaction with said filter means in dividing an image of the object into said respective color components, and nonseparating screen portions which are disposed between said separating lenses and through which a panchromatic image of the object is projected onto said image pickup means in overlapping relationship with said respective color components for providing luminance signals in said output.
Claim 6
Dependent Claim
81 words
A color video signal-generating apparatus as in claim 1, wherein said index image-forming means comprise transparent regions and nontransparent regions interposed optically between said object to be televised and said image pickup means, said transparent and nontransparent regions being arranged in alternating, side-by-side relationship and having respective widths which change gradually in said line-scanning direction whereby to correspondingly change the frequency of the black and white index images formed on said image pickup means by light passing through said transparent regions.
Claim 7
Dependent Claim
21 words
A color video signal-generating apparatus as in claim 5, wherein said index image-forming means are formed integrally with said filter means.
Claim 8
Dependent Claim
77 words
A color video signal-generating apparatus as in claim 5, wherein said screen comprises spaced, separating lenses for the coaction with said filter means in dividing an image of the object into said respective color components, and nonseparating screen portions which are disposed between said separating lenses and through which a panchromatic image of the object is projected onto said image pickup means in overlapping relationship with said respective color components for providing luminance signals in said output.
Claim 9
Dependent Claim
21 words
A color video signal-generating apparatus as in claim 7, wherein said index image-forming means are formed integrally with said filter means.
Claim 10
Dependent Claim
59 words
A video signal-generating apparatus as in claim 8, wherein said light-selective regions of said filter means are of equal width and are disposed in side-by-side relationship in said line-scanning direction, and said regions to select light of one wavelength occur in said filter means with the same frequency as said regions to select light of a different wavelength range.
Claim 11
Dependent Claim
53 words
A color video signal-generating apparatus as in claim 1, wherein said means for extracting color video signals from the output of said image pickup means comprise band pass filter means for receiving said output and respectively passing signals of different frequency ranges to separate the chrominance and index signals in the said output.
Claim 12
Dependent Claim
59 words
A video signal-generating apparatus as in claim 1, wherein said light-selective regions of said filter means are of equal width and are disposed in side-by-side relationship in said line-scanning direction, and said regions to select light of one wavelength range occur in said filter means with the same frequency as said regions to select light of another wavelength range.
Claim 13
Dependent Claim
25 words
A color video signal-generating apparatus as in claim 1, in which said carrier frequency of the index signals is greater than said color subcarrier frequency.
Claim 14
Dependent Claim
189 words
In a color video signal-generating apparatus of the type including image pickup means having scanning means and being operative to photoelectrically convert light projected onto said image pickup means into an electrical output composed of successive signals corresponding to the intensities of light successively encountered by said scanning means in a line-scanning direction, and means for projecting onto said image pickup means an image of the object to be televised, which image is divided into color components arranged side by side in said scanning direction to produce in said output respective chrominance signals of the same frequency band and a predetermined color subcarrier frequency; the improvement comprising means to project onto said image pickup means index images which, when encountered in said line-scanning direction, produce in said output angle modulated index signals having a carrier frequency greater than said color subcarrier frequency and a frequency band different from said frequency band of the chrominance signals, and means identifying said chrominance signals corresponding to the respective color components in accordance with said index signals and being operative to extract color video signals from said output of the image pickup means.
Claim 15
Dependent Claim
189 words
In a color video signal-generating apparatus of the type including image pickup means having scanning means and being operative to photoelectrically convert light projected onto said image pickup means into an electrical output composed of successive signals corresponding to the intensities of light successively encountered by said scanning means in a line-scanning direction, and means for projecting onto said image pickup means an image of the object to be televised, which image is divided into color components arranged side by side in said scanning direction to produce in said output respective chrominance signals of the same frequency band and a predetermined color subcarrier frequency; the improvement comprising means to project onto said image pickup means index images which, when encountered in said line-scanning direction, produce in said output angle modulated index signals having a carrier frequency greater than said color subcarrier frequency and a frequency band different from said frequency band of the chrominance signals, and means identifying said chrominance signals corresponding to the respective color components in accordance with said index signals and being operative to extract color video signals from said output of the image pickup means.
Claim 16
Dependent Claim
80 words
A color video signal-generating apparatus according to claim 13, in which said means to project index images is interposed optically between said object to be televised and said image pickup means and includes transparent and nontransparent regions arranged in alternating, side-by-side relationship in said line-scanning direction and having respective widths which change gradually in said line-scanning direction whereby to gradually change the frequency of the index signals which result from the images formed by light passing through said transparent regions.
References Cited (Backward Citations)
US2787655A
Cited
US2917574A
Cited
US3002051A
Cited
US3001012A
Cited
US3213190A
Cited
US3407265A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |