US2253292A - Color televistion system - Google Patents

Description

A. N. GOLDSMITH COLOR TELEVISION SYSTEM 4 Sheets-Sheet 1 Filed Feb. 27, 1959 I NV EN TOR. ALFRED N. GOLDSMITH A TTORNEY.

' 1941- A. N. GOLDSMITH 2,253,292

COLOR TELEVISION SYSTEM Filed Feb. 27, 1939 4 Sheets-Sheet 2 i 6 171 7 G (Y ()5; 5/ G52 I QQ55 6 @158 INVENTOR.

ALFRE N. GOLDSMITH ATTORNEY.

Aug. 19, 1941. N, TH' 2,253,292

COLOR TELEVISION SYSTEM Filed Feb. 27, 1939 4 Sheets-:Sheeg 3 J J2 J3 sou/v0 AMPLIFIER moumm/z ggg fk I Mom/mm "gig 5 I AA/SM/TTER HIE-VIOLET SYSTEM FOR P RECEIVER Fol? F 2 SYSTEM Y COMPL E TE K/NESCOPE ARRA Y RECEIVER Dune/5070M xs'rEM FOR FUR 3 51 l/E-V/OlET M INVENTOR. ALFRE N. GOLDSMITH A TTORNE Y.

1941- A. N. GOLDSMITH COLORVTELEVISION SYSTEM 4 Sheets-Sheet 4 Filed Feb, 27. 1939 A TTORNE Y.

Patented Au 19, 1941 UNITED STATES PATENT OFFICE COLOR TELEVISION SYSTEM Alfred N. Goldsmith, New York, N. Y. Application February 27, 1939, Serial No. 258,593

' Claims.

My invention rel-ates broadly to systems for the transmission and reproduction of television images, and more particularly to a system for transmitting and reproducing a color television picture on a large scale.

One of the severe disadvantages to which television is at the present time subject is the fact that the image is reproduced in comparatively small dimensions. Since the public has become accustomed to the viewing of motion pictures which are reproduced on a large screen, there is the possibility that small images reproduced on a small scale may not be favorably received. Accordingly, it is one of the objects of my invention to produce a color television picture having a comparatively large over-all dimension.

A number of experimenters have attempted to get around the problem of changing a small television reproduced imaged into a large image by a single so-called projection type of kinescope. At the present time, the projection type of kinescope has not been developed to a point where it is highly practicable in the reproduction of a complete image into an image of considerably larger size. Accordingly, it is another of the objects of my invention to provide a device wherein reproduced television pictures may be projected notonly in color but also satisfactorily projected to form an image of comparatively large dimensions.

Arrangements have been proposed heretofore for reproducing a television image in color by the use of individual color filters which move in synchronism with color filters of a like nature at the transmitting station, the color filters usually comprising a three primary color arrangement,

colors passing sequentially between the image to be transmitted and the scanning device. This, of course, entails the use of motors which 'must be operated in synchronism in order that the correct color translation may be made between the reproduced image and the scanned image. The use of such motors always suffers from some disadvantages since the problem of maintaining in synchronism two mechanically rotating elements which are positioned distantly from each other involves the use of a certain amount of apparatus. Accordingly, it is-another of the objects of my invention to provide a projection arrangement for reproducing and projecting tel- .evision pictures in color and in which no moving mechanical elements are involved.

The single projection kinescope has not at the a present time been developed to the degree where ts use is feasible. The light values obtained demand the use of very high'voltages and, due to the loss of light through the projection system, its application is not at the present time feasible. Accordingly it is another of the objects of my in-= vention to provide a multiple or multi-color array 1 ture reproducing kinesoopes, it is necessary that each component picture be reproduced in. its natural colors or the close simulation thereof.- If, for instance, the composite projected image comprises nine individual sectional areas, then each of the sectional areas has to be reproduced individually and in color. Accordingly, an array, of individual kinescopes is used, each to produce a sectional area. There will, therefore, have to be as many arrays of kinescopes as there are colors to be reproduced. Accordingly, it is another of the objects of my invention to provide an arrangement wherein each array of kinescopes corresponds to a given primary color.

The projection of a number of individual areas each of which forms a part of the complete image must be done in a fashion whereby the complete image does not give the effect of being broken down into individual sectionalized images. Accordingly, it is another of the objects of my invention to project either by simultaneous or sequential projection of the corresponding area of a complete picture screen a number or? primary colored component or partial pictures in accurate superimposition or registration.

In rsum, the objects of my invention are:

1. To produce a color television picture of large dimensions.

2. To provide a projected color television picture.

3. To provide a projection arrangement tor projecting color television pictures in which no moving mechanical parts are involved.

4. To provide a multiple or multi-color array of projection kinescopes for the projection of component or partial pictures which, in combination, produce the complete picture.

5. To provide an arrangement in which each array corresponds to a given primary color.

6. To project either by simultaneous or sequential projection on the corresponding area of a complete picture screen a number of primary colored component pictures in accurate superimposition or registration.

There has heretofore been proposed by applicent a system in which an array or individual kinescopes is used for the projection of sectional areas of a picture, which when superimposed accurately form a complete image. This has been shown both for black and white images and for color images, and reference should be had to my co-pending applications Serial Number 124,434, filed February 6, 1937, and Serial Number 235,- 557, filed October 18, 1938.

The basis of the color production in the present method is the fact that in the human eye and brain, all colors can be substantially duplicated by the addition, in correct proportions of a group of primary colors. In general, it is believed that there are three primary colors; namely, red, green, and violet-blue, in accordance with the observations of Helmholtz, Koenig, Abney and other early investigators in this field. On the other hand, there are others; namely, Zander, and Ladd-Franklin who have believed that there are four primary colors; namely, red, yellow, green and blue. For the purposes of illustration, a tricolor description is used although it should be understood that the method shown will be equally applicable to a four-color process or a two-color process for a limited range of colors, and it should be understood that I do not in any way limit myself to the tri-color process. In general, my apparatus comprises kinescope arrays having three horizontal rows and three vertical rows of kinescopes purely for the purposes of illustration. It will be understood that I do not in any sense limit myself to the particular number of kinescope arrays.

At the transmitting station, it is necessary to have a color pick-up with suitable color separation wherein the light from the object to be televised in its original colors may be broken down into its primary color components. The transmitting pick-up may therefore be carried on by scanning the scene sequentially through the three primary color filters with such rapidity that color fringes such as action fringes, and color flicker are avoided. For example, in a first case, the scanning rate may be tripled so that each component primary color picture is scanned in one-third the time required for black and white scanning. When this is done, the amount of intelligence to be carried on the television channel is tripled, thusgiving rise to a need for a transmission frequency channel of triple width. Alternatively, in a second case, the light picked up by the objective lens at the transmitter may be split up by well known means into three beams, each of which passes through an appropriate primary color filter to its own scanning system which may be, for instance, an iconoscope, and the iconoscope should be suitably color sensitive. The output of each iconoscope is then a video frequency signal which may be used to control the modulation either of a separate carrier frequency, or a single carrier may be used with appropriate multiplexing with modulation by each of the component-color signals.

The signals are received at the receiver, and in the case of a three primary color type of reproduction, the signal corresponding to a given primary color is then impressed on the array of kinescopes which reproduce on their screen the image corresponding in intensity to that particular color value of the image which is televised. The latter may be done by time selection of the component-color signals in the first case mentioned above. or by multiplex reception as usual in the second case mentioned above. Accordingly, with accurate superimposition of the images formed on each of the kinescope arrays, the picture'is reproduced without the aid of moving color filters into a large size natural color reproduction.

My invention will best be understood by reference to the figures in which:

Fig. 1 shows a sectionalized black and white reproducing system,

Fig. 2 shows exemplary tri-color reproducing system,

Fig. 3 is a more detailed view of one of the sectional color reproducers of Fig. 2,

Fig. 4 is an explanatory curve,

Figs. 5 through 10-show various ways of arranging the kinescopes reproducing a sectional area; and

Fig. 11 shows the superimposition of a number of sectional areas from individual iconoscopes,

Fig. 12 is an explanatory curve,

Fig. 13 is a schematic diagram of a transmission arrangement for sequential transmission of three colors.

Fig. 1415 a schematic diagram of a transmission arrangement for simultaneous transmission of three colors, and- Fig. 15 is a schematic arrangement showing the reception of either the simultaneous or sequential transmission.

Referring to Fig. 1, there is shown a schematic plan view of an array of kinescopes and their projection lenses arranged for black and white pictures in accordance with applicant's co-pending applications Serial Number 124,434, filed February 6, 1937, and Serial Number 235,557, filed October 18, 1938. A sectional area reproduced by each of the kinescope tubes has been shown as a square. The kinescope tubes I through 9 have been illustrated with their appurtenant projection lenses l0 through I8. The area ABFE, for instance, would be I produced by the kinescope I through projection lens Ill. The showing made herein is made for the purposes of illustration only, and naturally in order to obtain such an area as ABF'E, it would be necessary to use a masking device (not illustrated) between the screen of tube I and the screen on which the entire image was reproduced. This arrangement forms the foundation for the showing of Fig. 2 wherein similar reproduced sections are illustrated by the same characters as in Fig. 1.

For purposes of illustration only, one portion of the sectionalized reproduced image will be explained in view of the fact that the reproduction of each individual area is substantially the same; for instance, the reproduction in color of the area BCGF will be exactly the same as the reproduction in color of the area ABF'E. For purposes of illustration, the tri-color process is shown in this figure, that is to say, that three primary, colors are reproduced to make the complete color image. In this figure, kinescopes 20, 2| and 22 are illustrated with appurtenant projection lenses 23, 24 and 25. Each of the kinescopes will reproduce a primary color of the picture, and since the kinescopes are displaced with respect to each other, the projection lenses are displaced from a coaxial position with the associated kinescope in order that the reproduced section will come into accurate registration on the screen. For example, the kinescope 20 may be so constructed that the light projected from this kinescope to the screen is red. The kinescope 2| would produce the same section of the image While the video signals corresponding to a complete picture are received, they must of themselves be sectionalized or separated in order that each kinescope may produce only an area which contributes to a compositaand complete picture. The method of so doing does not form a part of the present application since this has been disclosed in my copending application- Serial Number 235,557, filed October 18, 1938. Accordingly, the kinesoope 20 would receive a portion of the complete red signal, the kinescope 26 would receive another portion, and the kinescope 21 would receive another still further portion, the complete signal being distributed to similarly located kinescopes ineach of the nine areas of the partial pictures illustrated.

Referring to Fig. 3, there is shown the particular arrangement of the three kinescopes reproducing one of the sectionalized or partial picture areas (for instance, ABFE) as illustrated in Fig. 2. Kinescopes 30, ti and 32 are illustrated, and it will be appreciated that each kinescope reproduces a primary color for the same section of the picture. A masking member whose aperture is illustrated as 33 is interposed between the kinesoope 30 and the screen on which the image is projected. Similarly, the aperture 3 6 of the mask associated with kinescope 3| is illustrated, and the aperture 35 or the mask associated with the kinescope 32 is illustrated. Interposed between the projection screen and the kinescope 30 is its associated projection lens 36, and this lens is preferably but not necessarily interposed between the mask whose aperture is 33 and the projected picture. The masks may be formed of one piece of material illustrated as 31, and the apertures may be formed in the single piece of masking material. Joined to the mask is three arm members 38, 39 and 40 which in this illustration separate the kinescopes 30, 3! and 32 respectively. These bail'ies or shields are provided to prevent portions of the light beam from one kinescope screen reaching the other projection lenses. Such shields as illustrated here prevent light interaction between the various kinescpes.' Any other equivalent form of shielding may be used.

Referring to Fig. 4, there is shown an explanatory diagram. While themethod of color teles vision of this disclosure involves the use of a triple array of kinescopes and, therefore, three for this saving is that each kinescope need pro duce a fluorescent picture only of a color agreeing fairly well with that of the corresponding primary color filter. In Fig. 4 is shown (not quantitatively but purely schematically) a set of light transmission curves for the three selected primary color filters. If the corresponding spec tral emission curves of the respective kinescopes are fairly close to curves 40, M, 42; 43. M, 45; and 46, 41, 48, it is evident that little light is absorbed by each filter and, therefore, a minimum of useless light will be produced by each kinescope screenfand the electrical efllciency in 3 light production of the triple array will not be markedly dlflerent from that or a single array producing a black and white picture. In fact, the

condition may be even more favorable with respect to the tri-color array emciency since it has been found that the light emitting eiiiciency o! fluorescing substances which give a substantially white fluorescence is notably lower than that of some substanceswhich emit within a more limited spectral range. In consequence of the fore-- going, it may prove practicable to use kinescopes or reduced size and input in the triple array as compared with those used'in the corresponding black and white array. 1

The time of fluorescence decay in each of the primary color kinescopes should be such that the contributed component picture lasts at least until the scanning of the next component picture of the same primary color begins. The degree of time overlapping, if any, between the outgoing and the incoming pictures can be determined best experimentally since it depends in part upon persistence of color vision by the eye. It will be a compromise between blurring of the picture due to too long a time of decay and color flicker resulting from too short a time of decay.

The process up to this point is then, in general terms, thsjfollowing:

1. Color separation of the scanned scene is accomplished at the transmitting station by simultaneous primary color scanning or by scquential primary color scanning.

2. Each of the primary color picture signals is transmitted either on the same carrier by multiplex methods or on individual carriers.

3. The primary color picture signals are received and separated either by time-division or by frequency-selection methods.

4. A multiple-array of kinescopes is arranged, consisting of an array of component-picture kinescopes for each primary color contribution to the complete picture. g

5. Each kinescope efficiently contributes its primary color component picture (preferablmbut pick-up light leakage to the complete picture screen.

Whereas, in Fig. 2, the primary color componentpicture kinescopes in each section of the array are arranged at the vertlces of an equilateral triangle, any other convenient arrangement may be alternatively used. Thus, in Figs; 5 through 10 are shown'other arrangements. It will be assumed for illustration that the transmission consists of three separate carriers, each modulated according to a single primary color picture, and that these three carriers are separately received and demodulated, the corresponding primary color picture video frequency signals being applied according to the methods of copending patent application Serial Number 124,434, filed February 6, 1937, to the corresponding primarycolor array of kinescopes. In effect,

we then have three independently operating but associated largescreen television receivers producing complete registered pictures of different primary colors on the; same large screen. This illustration has been selected for purposes of simplification, and also because it illustrates fully the particular aspects of the invention given below.

It should be noted that the optical axis of the primary color component picture objective will not pass through the center of the resulting component picture area on the large screen nor through the center of the kinescope screen picture (except in the case where one of the component-picture primary color kinescopes is placed so that the line from the center of the screen picture to the center of the kinescope picture is normal to both; a placement that can occur at most for one of the three tri-color kinescopes in each section of the array). jective must be of such dimensions and optical Therefore, the obdesign that spherical aberration, distortion, coma,

and undue reduction in picture brightness toward the edges of the component-picture areas shall not occur. That is anobjective having a larger area of reasonably uniformly illuminated and undistorted sharp field than would otherwise be required will be needed for the purpose.

It should also be noted that (unless the axis of the objective lenses of a particular kinescope does happen to pass through the center of the component picture area on the large screen, an effect which can at most occur for more than one-third of the objectives) an optical correction to secure a suitably centered picture is necessary by the use of the following expedient.

The primary-color component picture kinescopes are operated at normal vertical and horizontal negative deflection biases and with normal deflection control voltages or currents, as the case may be. There will thus be produced on each kinescope screen a centered (and appropriately masked) component'or partial picture in each case. But it will then be necessary to displace each objective lens so that its axis is not centered on the corresponding kinescope screen component picture, and to the extent necessary to get registration on the large screen. We have then a physical (optical) displacement, parallel to the large screen, of the optical axes of the opjectives in relation to the center of the fluorescent screens of the primary color component picture kinescopes and toward the center of the corresponding large screen component picture, and to such extent as to secure registration of the component picture on the large screen. (It may also be added that, if this were not done, there would be areas along th edges of the large screen which would be unusable because of the absence of one or more of the primary color component area pictures, unless additional and otherwise unnecessary edge-kinescopes were provided to fill these otherwise unfilled areas on the large screen). The displacement of the objectives is shown in'the side view of Fig. 11, the latter corresponding to Fig. 8.

Referring to Fig. 5, there is shown the grouping of three kinescopes 50, 5| and 52, each of the kinescopes furnishing a primary color image for the same sectional area of the picture.

Fig. 6 shows a still further alternative arrangement with kinescopes 53, 54 and 55.

Fig. 'I shows a still different arrangement for three kinescopes 56, 51 and 58.

Fig. 8 shows a still further arrangement for the three kinescopes 60, 6| and 62.

Fig. 9 is a still further arrangement for kinescopes 63, 64 and 65, and

Fig. 10 is still a further arrangement for kinescopes 66, 61 and 68.

Referring to Fig. 11, there is shown the manner in which three 'kinescopes such as arranged in Fig. 8, for example, may each project the color component picture fora sectional area of the complete picture. Kinescopes Ill might, for instance, reproduce the red component of the sectional areaone side of which would be bounded by RS. Appropriate masking means, such as H- lustrated at H, would be furnished in order to make the section reproduced square or rectangular in nature. interposed between the mask-v ing means and the screen 12 would be the projection lens 13. In view of the size or volume of the kinescope and the physical problems concerned, the kinescopes naturally could not each project on the same area and b arranged coaxially. Therefore, the lens 13 must be offset with respect to the face 14 of kinescope 10. The center points of the kinescope, the projection lens and the sectional or partial-picture area 12 should form a straight line, as illustrated by the line 16, and it is necessary that the projection lens 13 be offset with respect to the center on the screen of the cathode ray tube in order to accomplish this result. Kinescope 80 has its associated masking means 8| and projection lens 82, and kinescope 90 has its associated masking means 9| and its ofiset projection lens 92. It should be understood that the center of the projection lens referred to hereinbefore refers to the optical center of the lens.

Referring to Fig. 12, there is shown an explanatory curve showing how transmission may be accomplished either sequentially or simultaneously, and the relative bands necessary. F1 would be the band occupied by a transmitter transmtting, for instance, the red component of the optical value. F2 would represent the green component of the optical image which is transmitted and might be transmitted on a band inimediately adjacent that covered by F1. Similarly, Fa would represent the band covered by the transmission of the blue-violet component of the picture, and the sound accompanying the optical image might occupy a band immediately adjacent and relatively narrowly separated from 'mitting tube H which may be of the type known as an iconoscope. The color filter I2 is, in this illustration, a three color disc arrangement such as disclosed in my copending application Serial Number 235,557, filed October 18, 1938. The signals thus generated are representative of the color components of the object and the developed signals are passed to an amplifying arrangement l5. In view of the fact that sequential transmission of the complete frame of the object or picture in its color components is desired, there wer used three transmitters, each of which transmits only the image representative of a particular color. Accordingly, the commutating arrangement must be used so that the signals developed in the tube It may be transmitted by the proper transmitter. This 'is done in the following manner: The shaft, which drives the color filter l2, may Pass into a gear box It along the optical path It, for instance, traverses,

- tact with a brush member I8 which is connected to the output of amplifier i5. Three slip rings i9, 20 and 2| are provided, and each slip ring is connected to one of the segments l l, l1 and II" respectively. A conducting brush is provided for each slip ring, and currents passing through the brush are fed to the proper modulator and transmitter as, for instance, the brush joining the conductor 22 connects to the slip ring l9; and

when the brush i8 is in contact with the segment l1, currents will pass to the modulator joined to the red transmitter. It will be appreciated, of course, that the segments H, H and ii" are initially positioned so that'the member it contacts the segment I! when the red section of the filter i2 is interposed between the object it and the mosaic i3. The action is the same for the ring joined to themodulator for the transmitter for green and the transmitter for blue-violet respectively.

Referring to Fig. 14, there is shown an arrangement for the simultaneous transmission of a picture in three component colors, the colors here illustrated being the same as in the previone figure and, for illustrative purposes, are red. green and blue-violet. An object It is passed through a lens member ll onto a half silvered mirror l2 which, in its preferable arrangement, is a half sllvered rhomb. For purposes of convenience, the optical path in earth case has been indicated by a dotted line until the optical view impinges upon a photoelectric member. The view then divides along two optical paths, and one of these paths is illustrated as l3. This view passes through a filter member M, an auxiliary lens in, and impinges onto the photoelectric mosaic it of a transmitting tube I1, the output of which is fed to an amplifier I8, and thence to a modulator i9, and thence to a transmitter 20.

The view which follows the path 2! passes into a second half silvered mirror arrangement. or in the preferable arrangement a half silvered rhomb, and again passes along two divided optical paths 22 and 23. The view passing along the optical path 23 passes througha color filter it, an auxiliary lens 25, and impinges onto the mosaic 26 of a second transmitting tube 21. the signals thus developed being passed to an amplifier 28 and thence to a modulator 29 and to a transmitter 30.

The view that follows the optical path 22 passes through a third filter 3|, thence throu h an auxiliary lens 32, and impinges onto the photoelectric mosaic 33 of a third transmittin tube 34, the signals thus developed being passed to an amplifier 35 and thence to a modulator 36. and being transmitted by means of transmitter 31. It should be appreciated that for the best results the optical paths by means of which the view is impressed through different color filters onto the photoelectric mosaic of the three transmitting tubes should be substantially the same, that is to say, the air equivalent paths should be equal.

This has been illustrated by means of letters, and it will be seen that the. view that passes centrally a distance is then reflected and passes centrally through a second distance in glass equal to 2 and thence along an air path through an auxiliary lens until it impinges upon the photoelectric mosaic It. The image that passes along the optical paths 2| and 23 passes through a distance equal to X1+X2 in glass +Xa-l-X4 in glass, if we assume the mirrorto be placed on a 45 angle, plus an air path to the photoelectric mosaic 26. Accordingly, itwill be realized that the distance 2% plus the air equivalent oi the distance X4, plus the distance from X; to the photoelectric mosaic 26 should be equal to the air path from where the image emerges from the half silvered rhomb member i 2 to the photoelectric mosaic l6. Similarly, the image that passes along the optical path 22 should have the distance X3 plus the air equivalent of X4 plus the distance K5 equal to the distance between the plane of emergence of the image from the rhomb l2 along the optical line i 3 through the photoelectric mosaic it.

It should, also be appreciated that the color filters M, 25 and 3| are each differing color filters as, for instance, the filter it might be red,-the filter 25 might be green, and-the filter 3| might be blue-violet.

Referring to Fig. 15, there is shown schematically a receiving arrangement for either the simultaneous or the sequential transmission system. Signals received from the transmitter whose band is F1 are passed through a distributor system which properly distributes the signals to the iconoscopes which reproduce the individual red areas, Signals from transmitter whose ban-d is represented by F2 in Fig. 12, are passed through the distributor 16 for the green signals and thus to the array of the iconoscopes which reproduce the individual image areas in green. Similarly a receiver is provided for signals from the transmitter whose band isrepresented by F3 in Fig. 12, and thence through a distributor system to the iconoscopes which reproduce the blue-violet color. Reference should be had to my copending application, Serial Number 235,557, filed October 13, 1938, for the actual distributor arrangement. Since the distributor arrangement per se is not a part of this invention, a schematic showing is provided. Of course, it will be reali'zed that in actual practice the kinescopes marked R, those marked G, and those marked B would be arranged with one kinescope for repro duping red, one for reproducing blue-violet, and one for reproducing green arranged in a fashion as illustrated in the area ABFE of Fig. 2.

What I claim is:

1. A color television system comprising means for sequentially scanning and developing signals representative of the color components of an optical image to be reproduced, means for trans- 'mitting said signals, means for receiving said signals, a plurality of independent reproducing means for reconstructing substantially the same sectional area of the transmitted image in a different primary color, and means for projecta taneously reconstructing substantially the same sectional area of the transmitted image, each of said reproducing devices being adapted to reconstruct one primary color image, and means for projecting said reproduced sectional-area images as juxtaposed bi-dimensional partial image areas to form a composite color reproduction.

5. Apparatus in accordance with claim 4 wherein said plurality of independent reproducing means each comprise three cathode ray devices.

W 6. Apparatus in accordance with claim 4 wherein said plurality of independent reproducing means each comprise {our cathode ray devices.

7. The method of transmitting and reproducing in color an optical image to be televised. which comprises the steps of scaning the image sequentially to develop signals representative of the primary color components of the picture, and reproducing sectionalized areas of each complete image in a single color, and sequentially reproducing the complete picture in each color by means of the juxtaposition of the individual bi-dimensional sectionalized areas.

8. The method of. transmitting and reproducing in color an optical image to be televised which comprises the steps of scanning said image to simultaneously develop independent signals representative of the primary color components of said image, and simultaneously reproducing substantially the same sectionalized area of said picture in a plurality of primary colors and projecting said reproduced colored sectionalized areas to form a composite color picture by juxtaposition of the bi-dimensional sectionalized areas.

9. A color television system comprising a plurality of scanning means, means for impressing an image representation of a particular color component of said image onto each of said scanning means, the color images on each of said scanning means being different, a plurality of signal transmission channel's, means for impressing the signals developed on each of said plurality of said scanning means onto a different nels, and a plurality of groups of reproduc-' ing means for reconstructing the optical image, each of said groups being energized from the signals developed in one of said transmission channels, each group being adapted ity of cathode ray tubes each or which reproduces a bi-dimensional sectionalized juxtaposable partial image area of the complete optical image.

10. Apparatus in accordance with claim 9 wherein means are provided for masking each of the cathode ray tubes from the. tubes to prevent light interaction.

11. Apparatus in accordance with claim 1 wherein means are provided for masking each of the independent reproducing means from the other reproducing means.

12. Apparatus in accordance with claim 4 wherein means are provided for masking each of the independent reproducing means from the other reproducing means.

13. A television reproducer for reproducing color television pictures from signals representative of the color components of an optical image to be reproduced, comprising means for receiving said signals, a plurality of independent reproducing means for reconstructing substantially the same sectional area of the transmitted image in a diiferent primary color, and means forprojecting said reproduced sectional image areas as juxtaposed bi-dimensional partial image areas to form a composite color reproduction.

14. A television reproducer for reproducing color television pictures from signals representative of the color components of an optical image vices being adapted to recontruct one primary color image, and means for projecting said reproduced sectional area images as juxtaposed bi-dimensional partial image areas to form a composite color reproduction.

15. The method of reproducing in color optical images which have been televised and transmitted in the form of signals representative of the color components of the optical image, comprising the steps of reproducing sectionalized areas of each complete image in a single color and sequentially reproducing at least a portion of the complete optical image in each color by means of the juxtaposition of the individual bidimensional sectionalized areas,

ALFRED N. GOLDSMITH.

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