US3696202A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical system for a color television camera
Assignee: Fujinon Corp
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Filing: 1970-10-08
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Granted: 1972-10-03
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Expires: 1990-10-08
Abstract
Abstract A color television camera, comprising a taking lens, an image tube having a photoelectric surface, a monochrome stripe filter positioned at the focal point of said taking lens, a relay lens to form the light passing through said filter into a parallel light, dichroic means having three dichroic surfaces for separating the light from said relay lens into three color lights and directing said respective color lights at angles slightly from each other, and a second relay lens for focussing the ray pencil from said dichroic means on the photoelectric surface of said image tube.
Inventors
- 👤 Minoru Mori
- 👤 Toshiro Kishikawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 02:43
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/10; G02B27/1006; G02B27/1013; G02B27/14; G02B27/148; G03; G03B; G03B19/00; G03B19/18; G03B33/00; H; H04; H04N; H04N23/00; H04N23/10; H04N23/13; H04N23/16
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
96 words
A color television camera, comprising a taking lens, an image tube having a photoelectric surface, a monochrome stripe filter positioned at the focal point of said taking lens, a relay lens to form the light passing through said filter into a parallel light, dichroic means having three dichroic surfaces for separating the light from said relay lens into three color lights and directing said respective color lights at angles slightly different from each other, and a second relay lens for focussing the ray pencil from said dichroic means on the photoelectric surface of said image tube.
Claim 2
Dependent Claim
96 words
A color television camera, comprising a taking lens, an image tube having a photoelectric surface, a monochrome stripe filter positioned at the focal point of said taking lens, a relay lens to form the light passing through said filter into a parallel light, dichroic means having three dichroic surfaces for separating the light from said relay lens into three color lights and directing said respective color lights at angles slightly different from each other, and a second relay lens for focussing the ray pencil from said dichroic means on the photoelectric surface of said image tube.
Claim 3
Dependent Claim
93 words
A color television camera as defined in claim 1, wherein said monochrome stripe filter consists of transparent stripes of equal width formed on a black color plate in equally spaced relation, the width of said transparent stripes being one-third of the width of the black stripe formed between adjacent ones of said transparent stripes, and the white light passing through each stripe is separated into three color lights by the dichroic means, each of which color lights is focused on the photoelectric surface of the image tube in adjacent relation to each other.
Claim 4
Dependent Claim
29 words
A color television camera as defined in claim 1, wherein said dichroic means has three dichroic reflecting surfaces, the angles of inclination of which slightly differ from each other.
Claim 5
Dependent Claim
46 words
A color television camera as defined in claim 3, wherein the difference in angle of inclination between the adjacent dichroic reflecting surfaces is so selected that the color lights reflected on the respective surfaces are focussed on the photoelectric surface in adjacent relation to each other.
Claim 6
Dependent Claim
23 words
A color television camera as defined in claim 1, wherein said dichroic means has prism means combined therewith for preventing a color shading.
Claim 7
Dependent Claim
77 words
A color television camera as defined in claim 1, wherein second dichroic means is arranged between the taking lens and the monochrome stripe filter, which is adapted to pass only one of the three color lights while reflecting the other color lights, and the lights reflecting on said second dichroic means pass through said monochrome stripe filter, and further a second image tube is provided for receiving said one color light passing through said second dichroic means.
Claim 8
Dependent Claim
39 words
A color television camera as defined in claim 6, wherein said monochrome stripe filter includes alternately arranged black stripes and transparent stripes, and the width of said transparent stripes is the half of the width of said black stripes.
References Cited (Backward Citations)
US2696520A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-03 | 1976-04-03 | 1976-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-03 | 1980-04-03 | 1980-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-03 | 1984-04-03 | 1984-10-03 | $7700.00 | Window Closed / Lapsed |