GB729521A - Improvements in or relating to fluorescent screens - Google Patents
Improvements in or relating to fluorescent screensInfo
- Publication number
- GB729521A GB729521A GB5109/53A GB510953A GB729521A GB 729521 A GB729521 A GB 729521A GB 5109/53 A GB5109/53 A GB 5109/53A GB 510953 A GB510953 A GB 510953A GB 729521 A GB729521 A GB 729521A
- Authority
- GB
- United Kingdom
- Prior art keywords
- layer
- zns
- glass
- conductive
- afterglow
- 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
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
- H01J29/36—Photoelectric screens; Charge-storage screens
- H01J29/38—Photoelectric screens; Charge-storage screens not using charge storage, e.g. photo-emissive screen, extended cathode
- H01J29/385—Photocathodes comprising a layer which modified the wave length of impinging radiation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
- Y10T428/261—In terms of molecular thickness or light wave length
Landscapes
- Luminescent Compositions (AREA)
- Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
- Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)
Abstract
729,521. Luminescent screens. WESTING- HOUSE ELECTRIC INTERNATIONAL CO. Feb. 24, 1953 [March 29, 1952], No. 5109/53. Class 39 (1). A fluorescent screen for an X-ray image intensifier comprises a first layer of ZnS activated with Ag, a second layer of ZnS activated with Mn for quenching the afterglow of the first layer, and a photo-emissive coating of caesiated antimony superposed on the first layer. It is suggested that the X-rays may be replaced by radiation of different wavelength. The red or infra-red light emitted by the second layer which is excited partly by the X-rays and partly by the blue light emitted by the zinc sulphide-silver phosphor, releases the stored energy from the latter phosphor so that afterglow cannot occur. The screen comprises lime glass layer 1, Fig. 2, shaped as a watch glass, layer 2 of ZnS-Mn, layer 3 of ZnS-Ag, conductive layer 25, and photoemissive layer 27. Layer 27 of caesium-antimony responds only to the blue light from layer 3. Layer 25 may alternatively be non-conductive, e.g. of glass similar to the glass mixed with layer 3, or may be omitted if layer 27 is sufficiently conductive. The output fluorescent screen 13 is a zinc cadmium sulphide layer covered with an aluminium layer.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US279414A US2743195A (en) | 1952-03-29 | 1952-03-29 | X-ray image intensifier screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB729521A true GB729521A (en) | 1955-05-04 |
Family
ID=23068863
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5109/53A Expired GB729521A (en) | 1952-03-29 | 1953-02-24 | Improvements in or relating to fluorescent screens |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US2743195A (en) |
| BE (1) | BE518747A (en) |
| GB (1) | GB729521A (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2857523A (en) * | 1955-06-16 | 1958-10-21 | Corso Leonard | Fluoroscopic device |
| US2835822A (en) * | 1955-09-12 | 1958-05-20 | Gen Electric | X-ray fluoroscopic screen |
| CA651878A (en) * | 1958-03-31 | 1962-11-06 | The Rauland Corporation | Electron discharge device |
| US3075083A (en) * | 1961-01-06 | 1963-01-22 | Rca Corp | Image amplifying device |
| US3697795A (en) * | 1970-11-20 | 1972-10-10 | Machlett Lab Inc | Image intensifier tube having a multi-radius photocathode |
| JP2514952B2 (en) * | 1987-03-13 | 1996-07-10 | 株式会社東芝 | X-ray image tube |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2185439A (en) * | 1935-11-28 | 1940-01-02 | Firm Fernseh Aktien Ges | Method for optionally altering the after-glow period of phosphorescent screens |
| US2403227A (en) * | 1941-08-16 | 1946-07-02 | Rca Corp | Luminescent apparatus and method of developing luminescence |
| US2360516A (en) * | 1941-11-18 | 1944-10-17 | Gilbert T Schmidling | Phosphorescent device |
| US2447322A (en) * | 1943-11-04 | 1948-08-17 | Gen Electric | Infrared-responsive phosphors |
| US2504674A (en) * | 1945-08-31 | 1950-04-18 | Gen Electric | Luminescent material |
| US2476619A (en) * | 1946-08-23 | 1949-07-19 | Rca Corp | Cascade phosphor screen |
| US2523132A (en) * | 1949-08-10 | 1950-09-19 | Westinghouse Electric Corp | Photosensitive apparatus |
-
0
- BE BE518747D patent/BE518747A/xx unknown
-
1952
- 1952-03-29 US US279414A patent/US2743195A/en not_active Expired - Lifetime
-
1953
- 1953-02-24 GB GB5109/53A patent/GB729521A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2743195A (en) | 1956-04-24 |
| BE518747A (en) |
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