US3603722A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color television system
Assignee: National Aeronautics and Space Administration
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Filing: 1970-06-26
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Granted: 1971-09-07
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Expires: 1990-06-26
Abstract
Abstract A spring-driven optical filter wheel is rotatably mounted in front of the lens of a monochrome television camera. The wheel includes red, green and blue filter sectors and an opaque sector, the latter producing a completely black frame in the resulting video signal. The picture-reproducing apparatus located at the receiving station includes a monochrome television monitor having a second optical filter wheel rotatably mounted in front of the picture tube thereof. A counter counts the vertical sync pulses in the received video signal and advances this second filter wheel at the same rate as are occurring the completely single color frames in the video signal. A black frame detector detects the occurrence of a black frame and synchronizes the counter. A gate circuit is controlled by the counter to pass only completely single color video frames to the picture tube. A color film camera exposes a given segment of color film to the individual red, green and blue images following a given black frame to record a full color image on such segment.
Inventors
- 👤 Olin L Graham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:29
CPC Classifications
H; H04; H04N; H04N11/00
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
186 words
A color television system comprising: a monochrome television camera for viewing a scene and generating a television signal corresponding thereto; optical filter means comprising at least three sectors, two of which have different color transmission characteristics and the third of which is opaque; means for moving the filter sectors in front of the lens of the television camera, one at a time, for causing the television camera to generate a video signal having periodic frames individually representing at least a black image, an image in a first color and an image in a second and different color; means for transmitting the video signal to a remote location; means at such remote location for receiving and recovering the transmitted video signal; color image-producing means responsive to the recovered video signal and for producing images in different colors; and means responsive to the recovered video signal for detecting the occurrence of a black frame and controlling the imagereproducing means for causing the first-color video frame to produce an image in such first color and for causing the second-color video frame to produce an image in such second color.
Claim 2
Dependent Claim
186 words
A color television system comprising: a monochrome television camera for viewing a scene and generating a television signal corresponding thereto; optical filter means comprising at least three sectors, two of which have different color transmission characteristics and the third of which is opaque; means for moving the filter sectors in front of the lens of the television camera, one at a time, for causing the television camera to generate a video signal having periodic frames individually representing at least a black image, an image in a first color and an image in a second and different color; means for transmitting the video signal to a remote location; means at such remote location for receiving and recovering the transmitted video signal; color image-producing means responsive to the recovered video signal and for producing images in different colors; and means responsive to the recovered video signal for detecting the occurrence of a black frame and controlling the imagereproducing means for causing the first-color video frame to produce an image in such first color and for causing the second-color video frame to produce an image in such second color.
Claim 3
Dependent Claim
93 words
Apparatus for use with a monochrome television camera for enabling such camera to produce television signals from which may be reproduced a color image comprising: optical filter means comprising at least three sectors, two of which have different color transmission characteristics and the third of which is opaque; means for mounting the optical filter means in front of the lens of the monochrome television camera whereby the various sectors may move, one at a time, in front of such lens; and spring means for driving the optical filter means for causing such movement.
Claim 4
Dependent Claim
93 words
Apparatus for use with a monochrome television camera for enabling such camera to produce television signals from which may be reproduced a color image comprising: optical filter means comprising at least three sectors, two of which have different color transmission characteristics and the third of which is opaque; means for mounting the optical filter means in front of the lens of the monochrome television camera whereby the various sectors may move, one at a time, in front of such lens; and spring means for driving the optical filter means for causing such movement.
Claim 5
Dependent Claim
36 words
Apparatus in accordance with claim 2 wherein the optical filter means comprises at least four sectors, three of which have different color transmission characteristics corresponding to three primary colors and the fourth of which is opaque.
Claim 6
Dependent Claim
42 words
Apparatus in accordance with claim 2 wherein the optical filter means comprises five sectors, three of which have different color transmission characteristics corresponding to three primary colors, the fourth of which is opaque and the fifth of which is transparent and colorless.
Claim 7
Dependent Claim
68 words
Apparatus in accordance with claim 2 wherein the optical filter means is in the form of a wheel with the filter sectors occupying different sectors of the circle defined by the wheel and wherein The spring means includes an escapement mechanism for causing the optical filter wheel to rotate in a stepwise manner so that each sector is before the camera lens for a predetermined length of time.
Claim 8
Dependent Claim
43 words
Apparatus in accordance with claim 5 wherein the escapement mechanism is constructed so that each filter sector remains stationary in front of the camera lens for a length of time approximately equal to three times the vertical frame period of the television camera.
Claim 9
Dependent Claim
137 words
Picture-reproducing apparatus for reproducing a color image from a television video signal having periodic frames individually representing at least a black image, an image in a first color and an image in a second and different color comprising: color image-reproducing means responsive to the video signal for producing images in different colors; color control means responsive to the video signal for controlling the image-reproducing means for causing a first reproduced image to be in the first color and a second and subsequent reproduced image to be in the second color; and detector means responsive to the video signal for detecting the occurrence of a black frame and synchronizing the operation of the color control means whereby the first-color reproduced image corresponds to the first-color video frame and the second-color reproduced image corresponds to the second-color video frame.
Claim 10
Dependent Claim
137 words
Picture-reproducing apparatus for reproducing a color image from a television video signal having periodic frames individually representing at least a black image, an image in a first color and an image in a second and different color comprising: color image-reproducing means responsive to the video signal for producing images in different colors; color control means responsive to the video signal for controlling the image-reproducing means for causing a first reproduced image to be in the first color and a second and subsequent reproduced image to be in the second color; and detector means responsive to the video signal for detecting the occurrence of a black frame and synchronizing the operation of the color control means whereby the first-color reproduced image corresponds to the first-color video frame and the second-color reproduced image corresponds to the second-color video frame.
Claim 11
Dependent Claim
141 words
Picture reproducing apparatus in accordance with claim 7 wherein: the color image-reproducing means includes monochrome cathode-ray tube means for producing monochrome images corresponding to the different color video frames; the apparatus includes color-sensitive photographic means for recording the images reproduced by the cathode-ray tube means; the image-reproducing means also includes optical filter means comprising at least two sectors having color transmission characteristics corresponding to the first and second video signal colors; the image-reproducing means further includes means for mounting the optical filter means intermediate the cathode-ray tube means and the photographic means whereby the different sectors may move, one at a time, into the optical path therebetween; and the color control means includes means for causing advancement of the sectors of the optical filter means in step with the occurrence of the periodic black and color frames in the video signal.
Claim 12
Dependent Claim
40 words
Picture-reproducing apparatus in accordance with claim 7 and further including: camera means for recording the reproduced images on color-sensitive photographic film; and means for automatically advancing the photographic film each time a black frame is detected in the video signal.
Claim 13
Dependent Claim
102 words
Picture-reproducing apparatus in accordance with claim 7 wherein the color control means includes: sync separator circuit means responsive to the video signal for producing vertical sync pulses; counter circuit means for counting the vertical sync pulses and producing control pulses at a submultiple of the vertical sync rate; and color switching means responsive to these control pulses for changing the color of the image reproduced by the image-reproducing means; and wherein the detector means generates a black frame indicator pulse which is supplied to the counter circuit means for synchronizing the control pulses with the desired frame intervals in the video signal.
Claim 14
Dependent Claim
28 words
Picture-reproducing apparatus in accordance with claim 10 and further including gate circuit means responsive to the control pulses for selectively supplying the video signal to the image-reproducing means.
References Cited (Backward Citations)
US2435963A
Cited
US2878309A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-06 | 1975-03-08 | 1975-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-06 | 1979-03-08 | 1979-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-06 | 1983-03-08 | 1983-09-07 | $7700.00 | Window Closed / Lapsed |