US3582984A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color video signal generating apparatus
Assignee: Sony Corp
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Filing: 1969-02-03
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Granted: 1971-06-01
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Expires: 1989-02-03
Abstract
Abstract In a color video signal generating apparatus in which an objective lens projects an image of an object to be reproduced onto the photoconductive layer of a vidicon tube, color filters having stripelike filter regions of different wavelength band characteristics and a lens screen having cylindrical lenses extending parallel to the stripelike filter regions are arranged in sequence between the objective lens and the photoconductive layer with each color filter being disposed to satisfy the equation IN WHICH L IS THE DISTANCE FROM THE RESPECTIVE COLOR FILTER TO THE LENS SCREEN, B IS THE DISTANCE FROM THE LENS SCREEN TO THE PHOTOCONDUCTIVE LAYER, D AND A are respectively the pitches of the filter regions of the respective color filter and of the lenses of the lens screen, and gamma '' is a positive integer, and further the distances of the color filters from the lens screen and the pitches of the respective filter regions on the color filters are selected so that the images of the filter regions of each color filter projected by the cylindrical lenses on the photoconductive layer have pitches different from those of the images of the filter regions of the other color filters.
Inventors
- 👤 Hiromichi Kurokawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:51
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/03
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
226 words
In a color video signal generating apparatus having image pickup means with a photosensitive conversion layer, and objective lens means for projecting an image of an object to be reproduced onto said layer; a plurality of color filters having parallel stripelike filter regions of different wavelength band characteristics and a lens screen having a plurality of parallel cylindrical lenses extending in the same direction as said stripelike filter regions, said color filters and said lens screen being arranged in sequence between said objective lens means and said conversion layer along the optical axis of light from the object so that said cylindrical lenses project images of said stripelike filter regions onto said layer, each of said color filters being disposed to satisfy the equation 1+(l/b d/A) delta '' in which l is the distance from said lens screen to the respective color filter, b is the distance from said lens screen to said conversion layer, d is the pitch of said stripelike filter regions of the respective filter, A is the pitch of said cylindrical lenses and delta '' is a positive integer, and the values of d and l for each of said color filters being further selected so that the values of db./1 for the several color filters are all different, thereby to achieve different pitches for the images of the respective filter regions.
Claim 2
Dependent Claim
226 words
In a color video signal generating apparatus having image pickup means with a photosensitive conversion layer, and objective lens means for projecting an image of an object to be reproduced onto said layer; a plurality of color filters having parallel stripelike filter regions of different wavelength band characteristics and a lens screen having a plurality of parallel cylindrical lenses extending in the same direction as said stripelike filter regions, said color filters and said lens screen being arranged in sequence between said objective lens means and said conversion layer along the optical axis of light from the object so that said cylindrical lenses project images of said stripelike filter regions onto said layer, each of said color filters being disposed to satisfy the equation 1+(l/b d/A) delta '' in which l is the distance from said lens screen to the respective color filter, b is the distance from said lens screen to said conversion layer, d is the pitch of said stripelike filter regions of the respective filter, A is the pitch of said cylindrical lenses and delta '' is a positive integer, and the values of d and l for each of said color filters being further selected so that the values of db./1 for the several color filters are all different, thereby to achieve different pitches for the images of the respective filter regions.
Claim 3
Dependent Claim
28 words
A color video signal generating apparatus according to claim 1, in which at least two of said color filters are disposed at different distances from said lens screen.
Claim 4
Dependent Claim
58 words
A color video signal generating apparatus according to claim 2, in which said distance to said lens screen from the one of said two color filters having images of its filter regions projected with the smallest of said pitches for the images is dimensioned to cause said cylindrical lenses to accurately focus the respective images on said layer.
Claim 5
Dependent Claim
45 words
A color video signal generating apparatus according to claim 1, in which at least a first one of said color filters has said filter regions thereon with a pitch dIfferent from the pitch of the filter regions on a second one of said color filters.
Claim 6
Dependent Claim
33 words
A color video signal generating apparatus according to claim 4, in which the color filters having the filter regions thereon with different pitches are disposed at the same distance from said lens screen.
Claim 7
Dependent Claim
71 words
A color video signal generating apparatus according to claim 5, in which a third one of said color filters has the filter regions thereon with a pitch which is the same as that of the filer regions on one of said color filters disposed at said same distance from the screen, and said third color filter is at a distance from said lens screen that is different from said same distance.
Claim 8
Dependent Claim
45 words
A color video signal generating apparatus according to claim 1, in which cylindrical lenses of the lens screen are spaced from each other by intervening flat portions of the lens screen so that a luminance signal can also be obtained from said image pickup means.
Claim 9
Dependent Claim
50 words
A color video signal generating apparatus according to claim 1, in which all of said color filters are at different distances from said lens screen, and the pitch of said filter regions of the color filters is an integral number of times larger than said pitch of the cylindrical lenses.
References Cited (Backward Citations)
US2853547A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |