US2786157A - Television pick-up tubes - Google Patents
Television pick-up tubes Download PDFInfo
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- US2786157A US2786157A US286069A US28606952A US2786157A US 2786157 A US2786157 A US 2786157A US 286069 A US286069 A US 286069A US 28606952 A US28606952 A US 28606952A US 2786157 A US2786157 A US 2786157A
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- storage
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- potential
- multiplier
- dynode
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
- H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
- H01J29/023—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof secondary-electron emitting electrode arrangements
Definitions
- the present invention relates to television pick-up tubes of the storage type in which the scanning of the storage surface or target is effected by high-velocity electrons, for example of the order of 1000 volts. Tubes of this type include those known as iconoscopes and image-iconoscopes.
- the diiiiculty in obtaining satisfactory secondary-electron multiplication in high-velocity-scanned tubes is caused by the fact that the signal current consists of low-velocity secondary electrons which are released with different initial velocities and different directions of emission at different parts of the storage plate and are collected by the collector electrode,'usually in the form of a conducting wall coating inside the tube envelope and surrounding the storage plate.
- the present invention has for its object to provide an arrangement which reduces or overcomes the difficulties in collecting and accelerating the signal electrons from all parts of the storage plate of a high-velocity-scanned tube, and thereby enabling efiicient secondary-electron multiplication to be obtained.
- the multiplier is constructed in one or more sections extending around the front of the storageplate surface, the multiplier electrodes being screened from the storage plate by a screen or screens maintained at a potential which is substantially less (of the order of a hundred volts or more) than the potential of the first multiplier dynode, and preferably at a potential which is approximately the same as the potential of the internal wall coating of the tube, the screening action of a screen being such as to reduce the penetration of the positive field of the associated first multiplier dynode to such a small value that the storage surface stabilises at a potential which is positive with respect, to the wall coating or other adjacent electrodes but is low with respect to the potential of said first dynode, whilst permitting a sufficiently high field penetration to effect collection of substantially all the secondary electrons released from the storage surface by the multiplier.
- the mean velocity of the released secondary electrons is generally of the order of 2 to 3 volts and the optimum dynode potential is approximately '100 or more volts, a field penetration of less than 10%, for example about 3%, provides a suitable compromise, that is to say, that in the triode system consisting of the storage plate, the screen and the dynode, about 3% of the positive field of the dynode should be present at the surface of the storage plate.
- the photo-cathode of the tube is arranged to be operative only during the picture-blanking intervals (frame-blanking intervals and line-blanking intervals) when the tube is operating under high level light conditions, so that the photo-current is source 22.
- Fig. 1 shows a pick-up tube of the image-iconoscope type constructed according to the invention
- Fig. 2 shows a detail view of a modification.
- the pick-up tube shown in Fig. l is of the imageiconoscope type, and comprises an evacuated envelope 1 formed in known manner at one end with a photocathode 2 on which the picture to be projected is focussed by a lens 3.
- the released photo-electrons are focussed by the focus coil 4 onto the storage plate 5 backed by the signal plate 6, the focus coil 4 being energised from a suitable potential source 19.
- the storage plate is arranged to be scanned by an electron gun 7 fed from source 20 and located in a side tube of the envelope 1,
- the scanning beam being focussed and deflected by the focus coil 8 energised from potential source 21 and defleeting coils 9 fed with modulating waveforms from
- the internal surface of the envelope-1 is provided with a conductive Wall coating 10 normally
- the tube construction as so far described is conventional and V well-known in the art.
- the tube also includes an electron multiplier which may be in the form of a ring structure generally indicated at 11, the axis be co-axially mounted .if desired.
- the multiplier electrodes constituted by the first, second, third and fourth dynodes 12, 13, 14 and 15 respectively and the collector 16 are enclosed in a screening box 17, the end of which facing the storage plate 5 is covered by a screening mesh 18 through which the secondary electrons released from the storage plate 5 pass to impinge upon the first dynode 12.
- the screening box 17 and mesh 18 may be held at approximately the same potential as the wall coating 10 and are held at a potential substantially less (of the order of a hundred volts or more) than the potential of the first dynode 12, as shown schematically by the interposition of potential source 23.
- the size of theapertiire in the screening mesh 18 and its spacing from the first dynode12 are so determined that there is about 3% penetration of the positivefield of the first dynode into the space near the storage plate.
- the field penelight conditions so that the photo-current is interrupted z:.t'ration should, furthermore, be such that the' potential during the actual scanning of the tube. at-which the surface of. the storage'plate stabilises is To bring this about, the photo-cathode 2 may be biassed positivewithrespect toi-the wall"coatingxso'thatthe latter negatively by a series' lofipblses corresponding to the -produces azretarding fieldto the -secondary electronsand picture-blanking-pulses.
- the 'A switch 31 the diameter of the annular multiplier 'structurerto Y the may be incorporated to cut out the biassing pulses and distance between the s-creening mesh' and-the-storage to bias'the photo-cathode 2 continuously for continuous plateis made such as to'produce a"substantially'uriiform photo-emissiontwhenxthei tube: .is operatingunderllowfieldover the' surface-of the storagefplate Since" the light conditions.
- Thepulsing device..30 is connected to a insulating surface of the storage plate st abilises approxisuitable source 32"for'tl1e production of the negative pulses.
- the geometry of the arrangement or? the Furthermore;theiimumplier structure'beed not be in potentials applied to diiferent parts thereof may be adthefiormiof clrculal' rmg but can be of y other e011- justed. to producev a desired non-uniform fiel'd over the irem tish p br examplef rectangular form r plate, to compensate for or Other ;spond1ng'approxrrnately'to the'shape of the picture on the Spurious signals. storage plate.
- The'mult1pl 1er7 may'be constructed as a According to a further feature of the invention, the smgle un t from Plurahty 0f vseParate seetlehe Which surface of the storage plate 5 is constructedlto possess Y be p q pa'rt; for example it may c m t fDur a small "amount of surface leakage in order to equalise sk f l h us emb d t form a rectangular m any residual unevenness of the surface potential of. the iphernstl'ucturei the ends" bf'the Sections Preferably being storage plate without noticeable dilution of the charge close q pattern due to the picture storage.
- the trode arranged in-an enclosed hollow structure surround- "source 28 is adjustable under control of controlimeming the scanning bearnpan electron-permeable:electrode 29 between said-multiplier device and'said target, and? means "With a pick-up .tube such as sofarfdescribed' above, for: applying potentials to said multiplier device and to said' electron-permeable electrode for producing; a fieldpenetration ratioof the adjacent dynode of said' multiplier .-.device through 'said electron p'ermeable.electrode to said charge-storage target which is less th an' 10%.
- a television pick-upi tube of thestorage type in which :the; scanning of the charge-storage target is eifected by V v V v V ".high-velocity-electrons,comprising .a-secon'dary-electron "Ith g Home y a p Hewevertr-under "multiplierlocated between's'aid target and the some of 'h h l- S the 161181 adjustment (aperturey f scanningelectronsfsaid'rnultiplierdevice comprising at ethepick-up ttu'be isrmore criticaliin ordento; avoid'noise, ideast one dynode and a collector electrodeto'ta'lly'enclosed Les theincreased-ljight, whichirnproves therpicturepcauses "within an enclosed hollow structure facing said'targetj the -.excessive.;noise.
- a television pick-up tube comprising an envelope, a charge-storage surface within said envelope at one end thereof, a tubular member projecting from said envelope at an acute angle and communicating with the interior of said envelope and pointing towards said charge-storage surface, a source of electrons in said tubular member for producing a beam of electrons for scanning said chargestorage surface, and an electron multiplier consisting of at least one dynode and a collector electrode enclosed within an annular enclosed hollow structure facing said target and whose axis is off-set with respect to the longitudinal axis of the envelope and located out of the path of said beam of scanning electrons, the wall of said enclosed hollow structure confronting said target comprising an annular mesh electrode.
- Apparatus for transmitting television signals comprising a television pick-up tube comprising an envelope, 2. charge-storage surface within said envelope at one end thereof, a tubular member projecting from said envelope at an acute angle and communicating with the interior of said envelope and pointing towards said charge-storage surface, a source of electrons in said tubular member for producing a beam of electrons for scanning said chargestorage surface, an electron multiplier consisting of at least one dynode and a collector electrode enclosed within an annular enclosed hollow structure facing said target and whose axis is off-set with respect to the longitudinal axis of the envelope and located out of the path of said beam of scanning electrons, the wall of said enclosed hollow structure confronting said target comprising an annular mesh electrode, ⁇ a photo-cathode in said envelope at the end thereof opposite said charge-storage surface, and means for blanking out said photo-cathode during the time that the scanning beam is scanning said chargestorage surface.
Landscapes
- Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)
Description
March 19, 1957 R. THEILE TELEVISION PICK-UP TUBES Filed May 5, 1952 Inventor Rachcu-d Thefle.
2m w iierw m4! Attorney 2,786,157 TELEVISION PICK-UP TUBES Richard Theile, Cambridge, England, assignor to Pye Limited, Cambridge, England, a British company Application May 5, 1952, Serial No. 286,069 7 Claims priority, application Great Britain May 9, 1951 Claims. (Cl. 315-11) The present invention relates to television pick-up tubes of the storage type in which the scanning of the storage surface or target is effected by high-velocity electrons, for example of the order of 1000 volts. Tubes of this type include those known as iconoscopes and image-iconoscopes.
Various proposals have previously been made to incorporate secondary-electron multipliers withinthe pickup tube for improving its sensitivity. Hitherto, however, satisfactory results from the use of secondary-electron multipliers in pick-up tubes with high-velocity scanning have not been commercially achieved, and secondaryelectron multiplication is only incorporated in pick-up tubes with low-velocity electron scanning (for example image-orthicon tubes), as in such tubes the signal current from all parts of the storage plate returns substantially to the electron gun where it can be easily collected and directed into the multiplier.
The diiiiculty in obtaining satisfactory secondary-electron multiplication in high-velocity-scanned tubes is caused by the fact that the signal current consists of low-velocity secondary electrons which are released with different initial velocities and different directions of emission at different parts of the storage plate and are collected by the collector electrode,'usually in the form of a conducting wall coating inside the tube envelope and surrounding the storage plate.
The present invention has for its object to provide an arrangement which reduces or overcomes the difficulties in collecting and accelerating the signal electrons from all parts of the storage plate of a high-velocity-scanned tube, and thereby enabling efiicient secondary-electron multiplication to be obtained. For achieving the results according to the invention two problems have to be solved, namely (1) collection of the secondary electrons into the multiplier must be substantially uniform over the whole surface of the storage plate, and (2) thepotential at which the surface of the storage plate stabilises must only be effected to a small extent by the potential of the first multiplier electrode (dynode) since it is essential to maintain a suflicient potential difierence (of the order of 100 volts or more) between the surface of the storage plate and the first dynode in order to obtain the necessary acceleration of the collected secondary electrons for producing a high secondary-emission ratio in the multiplier system. 7
According to the present invention, the multiplier is constructed in one or more sections extending around the front of the storageplate surface, the multiplier electrodes being screened from the storage plate by a screen or screens maintained at a potential which is substantially less (of the order of a hundred volts or more) than the potential of the first multiplier dynode, and preferably at a potential which is approximately the same as the potential of the internal wall coating of the tube, the screening action of a screen being such as to reduce the penetration of the positive field of the associated first multiplier dynode to such a small value that the storage surface stabilises at a potential which is positive with respect, to the wall coating or other adjacent electrodes but is low with respect to the potential of said first dynode, whilst permitting a sufficiently high field penetration to effect collection of substantially all the secondary electrons released from the storage surface by the multiplier. As the mean velocity of the released secondary electrons is generally of the order of 2 to 3 volts and the optimum dynode potential is approximately '100 or more volts, a field penetration of less than 10%, for example about 3%, provides a suitable compromise, that is to say, that in the triode system consisting of the storage plate, the screen and the dynode, about 3% of the positive field of the dynode should be present at the surface of the storage plate.
In a preferred embodiment, in which an electron multiplier is utilised in conjunction with an image-converter tube, for example an image iconoscope, the photo-cathode of the tube is arranged to be operative only during the picture-blanking intervals (frame-blanking intervals and line-blanking intervals) when the tube is operating under high level light conditions, so that the photo-current is source 22.
constituting the collector electrode of the tube.
interrupted during the actual scanning of the tube. This enables the noise level to be reduced under such highlevel light conditions.
In order that the invention may be more fully understood, reference will now be made to the accompanying drawing, in which: I
Fig. 1 shows a pick-up tube of the image-iconoscope type constructed according to the invention,
Fig. 2 shows a detail view of a modification.
The pick-up tube shown in Fig. l is of the imageiconoscope type, and comprises an evacuated envelope 1 formed in known manner at one end with a photocathode 2 on which the picture to be projected is focussed by a lens 3. The released photo-electrons are focussed by the focus coil 4 onto the storage plate 5 backed by the signal plate 6, the focus coil 4 being energised from a suitable potential source 19. The storage plate is arranged to be scanned by an electron gun 7 fed from source 20 and located in a side tube of the envelope 1,
the scanning beam being focussed and deflected by the focus coil 8 energised from potential source 21 and defleeting coils 9 fed with modulating waveforms from The internal surface of the envelope-1 is provided with a conductive Wall coating 10 normally The tube construction as so far described is conventional and V well-known in the art.
According to the present invention, the tube also includes an electron multiplier which may be in the form of a ring structure generally indicated at 11, the axis be co-axially mounted .if desired. The multiplier electrodes constituted by the first, second, third and fourth dynodes 12, 13, 14 and 15 respectively and the collector 16 are enclosed in a screening box 17, the end of which facing the storage plate 5 is covered by a screening mesh 18 through which the secondary electrons released from the storage plate 5 pass to impinge upon the first dynode 12. The screening box 17 and mesh 18 may be held at approximately the same potential as the wall coating 10 and are held at a potential substantially less (of the order of a hundred volts or more) than the potential of the first dynode 12, as shown schematically by the interposition of potential source 23. The size of theapertiire in the screening mesh 18 and its spacing from the first dynode12 are so determined that there is about 3% penetration of the positivefield of the first dynode into the space near the storage plate. Such a low fieldv [the noise' level in the'picture is producedlbylthe-shot cflenetrationsdoesnot substantially imreaseaie potential nly"duiing"the pictur blanking "intervals which' may i at which .thetsturface. .of the storage. plate tstabilises, t whilst s :betihetframe. blankinginterzvalsand/or.thetlineablankit is sufiicient to accelerate .and cause the secondary elecing intervals when the tube is operating under hightrons to be collected by the multiplier. The field penelight conditions so that the photo-current is interrupted z:.t'ration should, furthermore, be such that the' potential during the actual scanning of the tube. at-which the surface of. the storage'plate stabilises is To bring this about, the photo-cathode 2 may be biassed positivewithrespect toi-the wall"coatingxso'thatthe latter negatively by a series' lofipblses corresponding to the -produces azretarding fieldto the -secondary electronsand picture-blanking-pulses. In the embodiment illustrated, --the latterare not'lost tothesurrounding electrodesbut the biassing'p'ulses are'produced by'a pulsing device 30 r; ar llt d b th 1t 1i -although;-if'desired;'theyrmay be obtained by appropriate wA ccording t l featurezofjthejnventioh, the ratio of volt'age'amplificatiom of theblan'king pulses. 'A switch 31 :the diameter of the annular multiplier 'structurerto Y the may be incorporated to cut out the biassing pulses and distance between the s-creening mesh' and-the-storage to bias'the photo-cathode 2 continuously for continuous plateis made such as to'produce a"substantially'uriiform photo-emissiontwhenxthei tube: .is operatingunderllowfieldover the' surface-of the storagefplate Since" the light conditions. Thepulsing device..30 is connected to a insulating surface of the storage plate st abilises approxisuitable source 32"for'tl1e production of the negative pulses. mately to the' adjacent space potential, anyno'n-uni- If desired, m ans may he pr d d f r perating the .wf it i h Space t i l p d d-b th fi ld f switch 31 automatically in dependence upon the amount the multiplier dynode would cause different portions of l f available light'in'the'scene or pi be transmitted- -'the= storage plate to stabilise 'at "differentpotentials, W a-p t m im n h s beefldescribed; it therebygiving rise to spurious signals. The-ratio ofthe vv'llillhbe understood r Various modifications ay be --said' diameter and distance isso chosen that th'estorage BW h p fi Scope bf the inventionhplate is. a i i where th fi ld i fi Thus," for example,th'e screenassociated with the first fiatness; the influence exerted by the signal plate and dY e h e in the f of a mesh as Shown at 18 the wall coating on this field being-takenint-o account. 7 25511 i y b eollstrueted from sheevmaterial -The distance between the first dynode and the screenh one more apertures r slbtsftbereirh Sheba modi- 1 ing mesh, as well as the relativepotentials therebetween, fieatibllfl us r d b zf h' Shows y a "have an -effect upon this field. Further,*by varying the Pa of h fp t f screening'box 17a having relative potentials of the screening-box and the wall'c oati r u formed of sheetmarerial. Providedwith all inggfor example by making the potentialtofithe former "ranr1ular SlOt'18a 'faClng" thestorage plate. 5. The first cs'lightlypoisitive or negative with respect to the potential dy 5 arranged Within the Screening box dof the latter, shown schematically by interposition of the e hr 'eleetr 0118' released therefrom r collected. y source 24,which'n'1akes the potential of the screening l e t 6 r b r Wlthlll' the from Seetioh of box slightly positive with respect to the coating 10, slight n e h r e aperture: 13a r y correction may" be effected in thefield disposition in Fheflange p' soifllat the collector 16a has 110 order to obtain field uniformity'over thesurfaceof the uen r the cblleetlohl ofz'the secondary electrons Storage plam leasedfrornthe' surface of thestorage plate.
' lf'desired, the geometry of the arrangement or? the Furthermore;theiimumplier structure'beed not be in potentials applied to diiferent parts thereof may be adthefiormiof clrculal' rmg but can be of y other e011- justed. to producev a desired non-uniform fiel'd over the irem tish p br examplef rectangular form r plate, to compensate for or Other ;spond1ng'approxrrnately'to the'shape of the picture on the Spurious signals. storage plate. The'mult1pl 1er7may'be constructed as a According to a further feature of the invention, the smgle un t from Plurahty 0f vseParate seetlehe Which surface of the storage plate 5 is constructedlto possess Y be p q pa'rt; for example it may c m t fDur a small "amount of surface leakage in order to equalise sk f l h us emb d t form a rectangular m any residual unevenness of the surface potential of. the iphernstl'ucturei the ends" bf'the Sections Preferably being storage plate without noticeable dilution of the charge close q pattern due to the picture storage. =may "be i' i 1 v [achieved by providing'the surfacev 'of lilldsforag q l 1; 'Intelevision"transmitting app'aratus,.tl1e combination "with a slightly con-ducting layerf 25, which may,.,for. .in- 9 .P '1 P tube of Zrhe ehargeesltorage yp i a stance be made of glass. An insulating layer'26is interclfargefstoragermrget with means for Scanning Said-target posed between the conducting layer 25. and lthe surface 'Wlth 'abeam of high'velocity s a ma 5 peripheral regions of storag surfa c gmay tlOD. device located between saidtarget andsaid be formed with conducting electrodes. 27 which; if he Scanning means and-Out Of-the p the ing a sired, .may' be connected to a. source ZSJofbiastfoi-biasf QmPr at least dY a Collector l singthe"surface of the storage plate. "Preferably; the trode arranged in-an enclosed hollow structure surround- "source 28 is adjustable under control of controlimeming the scanning bearnpan electron-permeable:electrode 29 between said-multiplier device and'said target, and? means "With a pick-up .tube such as sofarfdescribed' above, for: applying potentials to said multiplier device and to said' electron-permeable electrode for producing; a fieldpenetration ratioof the adjacent dynode of said' multiplier .-.device through 'said electron p'ermeable.electrode to said charge-storage target which is less th an' 10%.
'2. A television pick-upi tube of thestorage type in which :the; scanning of the charge-storage target is eifected by V v V v V ".high-velocity-electrons,comprising .a-secon'dary-electron "Ith g Home y a p Hewevertr-under "multiplierlocated between's'aid target and the some of 'h h l- S the 161181 adjustment (aperturey f scanningelectronsfsaid'rnultiplierdevice comprising at ethepick-up ttu'be isrmore criticaliin ordento; avoid'noise, ideast one dynode and a collector electrodeto'ta'lly'enclosed Les theincreased-ljight, whichirnproves therpicturepcauses "within an enclosed hollow structure facing said'targetj the -.excessive.;noise. face of said structure confronting said 'charge storage -"-Another feature of;:the::inventionzzhasicforzfitss object -target co'rnprisin'g a" mesh electrode. l-toovercome orgreduceltthisfiifficulty andx'to' this end the 1 39A" 'tele'vision pick-up tube of the storage type in mbedsarran-ged to hav-itszphoto+cathdde lzfioperative which the scanning of the charge-storage target serrated noise of the scanning beam current and also of the=photocurrent' itself. When operating under low-light. conditions for which the mu-ltiplier tnbe is mostsuitablquthe average photo-current is' less. than oratihlrhbstqual 6 to,"the scanning-beam current, so .that thennoisefldueflto thefphoto-current is not; appreciable and ionlyglincreases smugplier consisting of at least one dynode and a collector electrode totally enclosed vithin an annular enclosed hollow structure facing and closely adjacent said target, the wall of said structure confronting said charge-storage surface comprising an annular mesh electrode. I
4. A television pick-up tube comprising an envelope, a charge-storage surface within said envelope at one end thereof, a tubular member projecting from said envelope at an acute angle and communicating with the interior of said envelope and pointing towards said charge-storage surface, a source of electrons in said tubular member for producing a beam of electrons for scanning said chargestorage surface, and an electron multiplier consisting of at least one dynode and a collector electrode enclosed within an annular enclosed hollow structure facing said target and whose axis is off-set with respect to the longitudinal axis of the envelope and located out of the path of said beam of scanning electrons, the wall of said enclosed hollow structure confronting said target comprising an annular mesh electrode.
5. Apparatus for transmitting television signals, comprising a television pick-up tube comprising an envelope, 2. charge-storage surface within said envelope at one end thereof, a tubular member projecting from said envelope at an acute angle and communicating with the interior of said envelope and pointing towards said charge-storage surface, a source of electrons in said tubular member for producing a beam of electrons for scanning said chargestorage surface, an electron multiplier consisting of at least one dynode and a collector electrode enclosed within an annular enclosed hollow structure facing said target and whose axis is off-set with respect to the longitudinal axis of the envelope and located out of the path of said beam of scanning electrons, the wall of said enclosed hollow structure confronting said target comprising an annular mesh electrode, \a photo-cathode in said envelope at the end thereof opposite said charge-storage surface, and means for blanking out said photo-cathode during the time that the scanning beam is scanning said chargestorage surface.
References Cited in the file of this patent UNITED STATES PATENTS 2,230,134 Colberg et a1. Jan. 28, 1941 2,237,896 Vance Apr. 8, 1941 2,374,914 Behne et al. May l, 1945 2,611,820 Somers Sept. 23, 1952 2,652,515 McGee Sept. 15, 1953 FOREIGN PATENTS 635,712 Great Britain Apr. 12, 1950
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2786157X | 1951-05-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2786157A true US2786157A (en) | 1957-03-19 |
Family
ID=10915304
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US286069A Expired - Lifetime US2786157A (en) | 1951-05-09 | 1952-05-05 | Television pick-up tubes |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US2786157A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2951175A (en) * | 1956-10-23 | 1960-08-30 | Fay E Null | Detector system |
| US3191086A (en) * | 1960-11-23 | 1965-06-22 | Radames K H Gebel | Secondary emission multiplier intensifier image orthicon |
| US3423624A (en) * | 1966-06-08 | 1969-01-21 | Wilford L Steiner | Electron image correlation tube with dual storage screens |
| US3424937A (en) * | 1965-01-08 | 1969-01-28 | Goodyear Aerospace Corp | Electron image correlator tube |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2230134A (en) * | 1936-05-09 | 1941-01-28 | Firm Fernseh Ag | Image analyzing tube |
| US2237896A (en) * | 1936-02-29 | 1941-04-08 | Rca Corp | Electronic device |
| US2374914A (en) * | 1940-09-03 | 1945-05-01 | Behne Rudolf | Television pickup tube |
| GB635712A (en) * | 1946-03-08 | 1950-04-12 | Rca Corp | Improvements in or relating to television and like pick-up or camera cathode ray tubes |
| US2611820A (en) * | 1947-02-18 | 1952-09-23 | Rca Corp | Pickup tube beam-interrupting circuit |
| US2652515A (en) * | 1946-12-18 | 1953-09-15 | Emi Ltd | Negative charge image television transmission tube |
-
1952
- 1952-05-05 US US286069A patent/US2786157A/en not_active Expired - Lifetime
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2237896A (en) * | 1936-02-29 | 1941-04-08 | Rca Corp | Electronic device |
| US2230134A (en) * | 1936-05-09 | 1941-01-28 | Firm Fernseh Ag | Image analyzing tube |
| US2374914A (en) * | 1940-09-03 | 1945-05-01 | Behne Rudolf | Television pickup tube |
| GB635712A (en) * | 1946-03-08 | 1950-04-12 | Rca Corp | Improvements in or relating to television and like pick-up or camera cathode ray tubes |
| US2652515A (en) * | 1946-12-18 | 1953-09-15 | Emi Ltd | Negative charge image television transmission tube |
| US2611820A (en) * | 1947-02-18 | 1952-09-23 | Rca Corp | Pickup tube beam-interrupting circuit |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2951175A (en) * | 1956-10-23 | 1960-08-30 | Fay E Null | Detector system |
| US3191086A (en) * | 1960-11-23 | 1965-06-22 | Radames K H Gebel | Secondary emission multiplier intensifier image orthicon |
| US3424937A (en) * | 1965-01-08 | 1969-01-28 | Goodyear Aerospace Corp | Electron image correlator tube |
| US3423624A (en) * | 1966-06-08 | 1969-01-21 | Wilford L Steiner | Electron image correlation tube with dual storage screens |
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