US2613330A - Cathode-ray image converter tube - Google Patents
Cathode-ray image converter tube Download PDFInfo
- Publication number
- US2613330A US2613330A US194074A US19407450A US2613330A US 2613330 A US2613330 A US 2613330A US 194074 A US194074 A US 194074A US 19407450 A US19407450 A US 19407450A US 2613330 A US2613330 A US 2613330A
- Authority
- US
- United States
- Prior art keywords
- layer
- cathode
- ray image
- tube
- screen
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000000463 material Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 229910052709 silver Inorganic materials 0.000 description 3
- 239000004332 silver Substances 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 230000008016 vaporization Effects 0.000 description 2
- 241000288982 Loris Species 0.000 description 1
- 101100400378 Mus musculus Marveld2 gene Proteins 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 1
- 229910052792 caesium Inorganic materials 0.000 description 1
- TVFDJXOCXUVLDH-UHFFFAOYSA-N caesium atom Chemical compound [Cs] TVFDJXOCXUVLDH-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229940019452 loris Drugs 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J31/00—Cathode ray tubes; Electron beam tubes
- H01J31/08—Cathode ray tubes; Electron beam tubes having a screen on or from which an image or pattern is formed, picked up, converted, or stored
- H01J31/50—Image-conversion or image-amplification tubes, i.e. having optical, X-ray, or analogous input, and optical output
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/32—Fiducial marks and measuring scales within the optical system
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2231/00—Cathode ray tubes or electron beam tubes
- H01J2231/50—Imaging and conversion tubes
- H01J2231/50005—Imaging and conversion tubes characterised by form of illumination
- H01J2231/5001—Photons
- H01J2231/50015—Light
- H01J2231/50026—Infrared
Definitions
- the present invention relatesjto. cathodaray tubes and more particularly to cathoderayimage converter tubes and to a method for manufacturing the same.
- Cathode ray image converter tubes serve .as opticall instruments for .converting light images of one Wavelength intolightimagesof another, usually visible, wavelength and ⁇ for amplifying images of low brightness. These tubesusually comprise a photo-electrically active layer responsive to the impinging radiation, an electron lens system for focussing the. electrons emittedby the photo-electric layer into an electron image and a iiuorescent projection screen for converting the electron image into an image ofthe desired wavelength, usually visible. ⁇ Whensu'ch tubes comprise a cathode sensitive toinfra-red radiation, they may be used for observing objects in the dark or mist.
- the above disadvantages are obviated by providing at the carrier of the photoelectrically active layer an object which projects itself electronoptically as a mark onto the projection screen.
- the carrier for the photoelectric layer is constituted by the wall of the discharge tube.
- a figure projecting itself as a mark may be provided at the exterior of this wall.
- thegthickness of the tube wall is usually. ⁇ too great'to Yobtain Va .sufhciently sharp shadow 'of ,the figure.”
- the figure ⁇ tojbe projected .is located underneath the photo-electrically sensitive layer .on the carrier vthereby'in- ,terce'pting the impingi'ng light .'rfays.v
- the ligure to be projected asfa ⁇ mark may alternatively, be I ⁇ produced. .in a differeriftlma'nner,y for .example by the local removalof thephoto-ele'ctric material in accordance with the desired pattern or ⁇ by ,providing ,a material, ⁇ pre-ventingA ,activation of .the
- a window 6 has been ,leftF free "atjthe,centreof the opaque layer.
- a second've'ry thin 4transparent layer extends over the layer 4 and the window 6, this second layer having been produced by precipitating silver or a different suitable metal and sensitised under the action of oxygen and caesiurn vapour in a known manner such as to act as a photo-electric cathode.
- the thickness of the layers 4 and 'l is exaggerated in the drawing.
- the opaque layer actually has, for example, a thickness of 0.1 micron, the layer 'l usually having a thickness only of several atoms.
- the bottom part 3 comprises a flat plate 8 carrying the fluorescent screen 9. Furthermore, it carries a metal hood I D constituting the anode or electron focussing member of the tube.
- the spherical cap Il of the anode and the concave cathode surface jointly constitute an electronoptical system by which the cathode-rays passing through an aperture I2 provided in the anode cap are focussed in such manner as to produce an image of the window 6 on the screen 9.
- a supply conductor I3 passing through the bottom part 3 in a vacuum-tight manner is secured to the anode.
- the window 6 is formed during the application ofthe layer -4 and this is eifected by means of a mask arranged on the inner wall of the spherical part 2, which mask is removed prior to applying the photo-electrically active layer.
- This mask has an aperture consisting of four slits jointly forming a small cross with the point of intersection in the axis of the tube, thus creating on the wall of the tube a figure I4 corresponding to the aperture of the mask on applying the layer 4.
- This figure intercepts extraneous light rays and when vprojecting an image onto the sensitive layer 1 by means of a suitable optical system (not shown). The same figure is observed through the transparent plate 8 on the fluorescent screen 9 as a cruciform mark.
- the gure I4 and the layer 4 are preferably formed by vacuum vaporization of a suitable metal, for example, by vaporizing aluminum, silver or the like from a suitable chamber electrically heated by a tungsten 'filament'. Subsequently, the mask is removed 'and the bulb is closed by a bottom comprising 'the anode iIl and a fluorescent screen 9. After the tube has again been exhausted, another layer of metal, for example, o-f silver or antimony is precipitated onto the cathode carrier 2, butnow to such a thinness as to be transparent.
- a suitable metal for example, by vaporizing aluminum, silver or the like from a suitable chamber electrically heated by a tungsten 'filament'.
- the mask is removed 'and the bulb is closed by a bottom comprising 'the anode iIl and a fluorescent screen 9.
- another layer of metal for example, o-f silver or antimony is precipitated onto the cathode carrier 2, butnow to such
- a cathode ray image converting device comprising a carrier member, a photoelectric layer mounted on said carrier member and having an active area with a given boundary, said carrier member having within the .boundary of said area a portion defining a non-photoelectrically active figure of given conguration on said photoelec- .4 electron focussing member interposed between said layer and said screen.
- a cathode ray image converting device comprising a carrier member, a photoelectric layer mounted on one side of said carrier member and having an active area with av given boundary, said carrier member having on the said one side and within said area a portion defining a nonphotoelectrically active iigure of given configuration on said photoelectric layer, an electron-responsive screen, and an electron focussing member interposed between said layer and said screen.
- said carrier member tric layer, an electron-responsive: screen, and van y and surrounding said active area, said carrier member having on the said one side and within said area a portion of opaque material defining a non-photoelectrically active gure of given coniiguration on said photo-electric layer, an electron-responsive screen, and an electron focussing member interposed between said layer and said screen.
- a cathode ray image converting device comprising a transparent envelope portion, a photoelectric layer mounted on one side of said envelope portion and having an active area with a given boundary, an opaque layer of aluminum on said envelope portion and surrounding said active area, said envelope portion having on the inside thereof and Within said area an aluminum deposit defining a non-photoelectrically active figure of given configuration on said photo-electric layer, a fluorescent screen, and an electron focussing member interposed between said layer and said screen.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)
- Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
- Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL285928X | 1949-11-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
US2613330A true US2613330A (en) | 1952-10-07 |
Family
ID=19782511
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US194074A Expired - Lifetime US2613330A (en) | 1949-11-25 | 1950-11-04 | Cathode-ray image converter tube |
Country Status (6)
Country | Link |
---|---|
US (1) | US2613330A (fr) |
BE (1) | BE499549A (fr) |
CH (1) | CH285928A (fr) |
DE (1) | DE832646C (fr) |
FR (1) | FR1028305A (fr) |
GB (1) | GB672004A (fr) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2663814A (en) * | 1950-10-30 | 1953-12-22 | Hartford Nat Bank & Trust Co | Electron-optical image intensifier |
US2757293A (en) * | 1951-09-26 | 1956-07-31 | Hartford Nat Bank & Trust Co | Luminoscope |
US2774909A (en) * | 1951-08-09 | 1956-12-18 | Hartford Nat Bank & Trust Co | Television pick-up tube comprising electrostatic electron-optical means |
US2794140A (en) * | 1953-11-20 | 1957-05-28 | Rca Corp | Phototubes |
US2878406A (en) * | 1954-07-23 | 1959-03-17 | Bergson Gustav | Photoelectric tube |
US2922048A (en) * | 1958-08-14 | 1960-01-19 | Neel W Glass | High current coaxial photomultiplier tube |
US3585433A (en) * | 1968-04-29 | 1971-06-15 | Westinghouse Electric Corp | Masked photocathode with first and second metallic patterns |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE924252C (de) * | 1953-04-20 | 1955-03-14 | Licentia Gmbh | Blindlandeverfahren bei befeuerten Anfluglinien und Startbahnen |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2151785A (en) * | 1937-06-26 | 1939-03-28 | Emi Ltd | Electron discharge device |
-
0
- BE BE499549D patent/BE499549A/xx unknown
-
1950
- 1950-11-04 US US194074A patent/US2613330A/en not_active Expired - Lifetime
- 1950-11-22 DE DEN3143A patent/DE832646C/de not_active Expired
- 1950-11-22 GB GB28548/50A patent/GB672004A/en not_active Expired
- 1950-11-23 FR FR1028305D patent/FR1028305A/fr not_active Expired
- 1950-11-23 CH CH285928D patent/CH285928A/de unknown
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2151785A (en) * | 1937-06-26 | 1939-03-28 | Emi Ltd | Electron discharge device |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2663814A (en) * | 1950-10-30 | 1953-12-22 | Hartford Nat Bank & Trust Co | Electron-optical image intensifier |
US2774909A (en) * | 1951-08-09 | 1956-12-18 | Hartford Nat Bank & Trust Co | Television pick-up tube comprising electrostatic electron-optical means |
US2757293A (en) * | 1951-09-26 | 1956-07-31 | Hartford Nat Bank & Trust Co | Luminoscope |
US2794140A (en) * | 1953-11-20 | 1957-05-28 | Rca Corp | Phototubes |
US2878406A (en) * | 1954-07-23 | 1959-03-17 | Bergson Gustav | Photoelectric tube |
US2922048A (en) * | 1958-08-14 | 1960-01-19 | Neel W Glass | High current coaxial photomultiplier tube |
US3585433A (en) * | 1968-04-29 | 1971-06-15 | Westinghouse Electric Corp | Masked photocathode with first and second metallic patterns |
Also Published As
Publication number | Publication date |
---|---|
CH285928A (de) | 1952-09-30 |
DE832646C (de) | 1952-02-28 |
GB672004A (en) | 1952-05-14 |
FR1028305A (fr) | 1953-05-21 |
BE499549A (fr) |
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