GB615727A - Improvements relating to the manufacture of targets for cathode ray tubes - Google Patents
Improvements relating to the manufacture of targets for cathode ray tubesInfo
- Publication number
- GB615727A GB615727A GB25371/45A GB2537145A GB615727A GB 615727 A GB615727 A GB 615727A GB 25371/45 A GB25371/45 A GB 25371/45A GB 2537145 A GB2537145 A GB 2537145A GB 615727 A GB615727 A GB 615727A
- Authority
- GB
- United Kingdom
- Prior art keywords
- target
- indicia
- bombardment
- electron
- transparent
- 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
Links
- 238000004519 manufacturing process Methods 0.000 title 1
- 239000000463 material Substances 0.000 abstract 3
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 abstract 2
- 239000003513 alkali Substances 0.000 abstract 2
- 150000004820 halides Chemical class 0.000 abstract 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 abstract 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 abstract 1
- 229910052793 cadmium Inorganic materials 0.000 abstract 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 abstract 1
- 238000010894 electron beam technology Methods 0.000 abstract 1
- 150000004679 hydroxides Chemical class 0.000 abstract 1
- 150000002500 ions Chemical class 0.000 abstract 1
- 239000011777 magnesium Substances 0.000 abstract 1
- 229910052749 magnesium Inorganic materials 0.000 abstract 1
- 239000000395 magnesium oxide Substances 0.000 abstract 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 abstract 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 230000003287 optical effect Effects 0.000 abstract 1
- 239000002245 particle Substances 0.000 abstract 1
- 229910052697 platinum Inorganic materials 0.000 abstract 1
- 239000001103 potassium chloride Substances 0.000 abstract 1
- 235000011164 potassium chloride Nutrition 0.000 abstract 1
- WEQHQGJDZLDFID-UHFFFAOYSA-J thorium(iv) chloride Chemical compound Cl[Th](Cl)(Cl)Cl WEQHQGJDZLDFID-UHFFFAOYSA-J 0.000 abstract 1
Classifications
-
- 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
- H01J29/10—Screens on or from which an image or pattern is formed, picked up, converted or stored
- H01J29/14—Screens on or from which an image or pattern is formed, picked up, converted or stored acting by discoloration, e.g. halide screen
Landscapes
- Physical Vapour Deposition (AREA)
- Thermal Transfer Or Thermal Recording In General (AREA)
Abstract
615,727. Cathode-ray tubes. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. Sept. 29, 1945, No. 25371. Convention date, Sept. 29, 1942. [Class 39 (i)] A target of a cathode-ray tube is made by condensing an alkali halide or magnesium oxide on to a support whilst subjecting the material simultaneously to bombardment by electrons, ions, alpha particles, photons, X-rays, or gamma rays, so as to control the opacity of the material deposited on the support. The alkali halide used is preferably potassium chloride, which may contain a small amount of thorium chloride, hydroxides, or traces of cadmium or magnesium. The mixture is placed in a platinum container 12, Fig. 1, and heated by a coil 14 to vaporize it on to the tube wall 6 or on to a separate transparent support adjacent to the wall 6, the pressure being kept at 10<-4> mm. Hg. Simultaneously, the wall 6 is scanned by an electron beam from gun 8, the electron velocity and current density being variable to vary the opacity of the target. The final target may have alternate layers of transparent and translucent material, in which case an intermittent electron bombardment is used, and in this case the varying heat of bombardment may also vary the transparency of the target. Alternatively, pattern markings or indicia may be produced, the indicia being opaque or transparent, by scanning only certain areas of the target. A similar result may be obtained by a removable mask which shields certain parts of the target from electron bombardment. The indicia may be formed in one or more of the multiple layers, and two sets of indicia may be used in the outer layer of each side of the target. The target may in use be viewed by reflected or transmitted light. Schmidt optical systems may project the " image " on to a viewing screen. Specification 621,729 is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US460055A US2409606A (en) | 1942-09-29 | 1942-09-29 | Alkali halide screen and method of manufacture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB615727A true GB615727A (en) | 1949-01-11 |
Family
ID=23827239
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB25371/45A Expired GB615727A (en) | 1942-09-29 | 1945-09-29 | Improvements relating to the manufacture of targets for cathode ray tubes |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2409606A (en) |
| GB (1) | GB615727A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2535817A (en) * | 1942-09-14 | 1950-12-26 | Nat Union Radio Corp | Electrooptical dark trace storage tube |
| US2441217A (en) * | 1945-07-09 | 1948-05-11 | Us Sec War | Process of coating cathode-ray tube screens |
| US3276902A (en) * | 1963-10-01 | 1966-10-04 | Itt | Method of vapor deposition employing an electron beam |
| US3647959A (en) * | 1968-06-24 | 1972-03-07 | Robert J Schlesinger | System for generating a hologram |
| US10048043B2 (en) | 2016-07-12 | 2018-08-14 | Paul Rahmanian | Target carrier with virtual targets |
-
1942
- 1942-09-29 US US460055A patent/US2409606A/en not_active Expired - Lifetime
-
1945
- 1945-09-29 GB GB25371/45A patent/GB615727A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2409606A (en) | 1946-10-15 |
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