GB668854A - Improvements in or relating to image intensifiers - Google Patents
Improvements in or relating to image intensifiersInfo
- Publication number
- GB668854A GB668854A GB10020/49A GB1002049A GB668854A GB 668854 A GB668854 A GB 668854A GB 10020/49 A GB10020/49 A GB 10020/49A GB 1002049 A GB1002049 A GB 1002049A GB 668854 A GB668854 A GB 668854A
- Authority
- GB
- United Kingdom
- Prior art keywords
- layer
- image
- photo
- electric
- fluorescent 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
Links
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
- H01J31/503—Image-conversion or image-amplification tubes, i.e. having optical, X-ray, or analogous input, and optical output with an electromagnetic electron-optic system
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21K—TECHNIQUES FOR HANDLING PARTICLES OR IONISING RADIATION NOT OTHERWISE PROVIDED FOR; IRRADIATION DEVICES; GAMMA RAY OR X-RAY MICROSCOPES
- G21K4/00—Conversion screens for the conversion of the spatial distribution of X-rays or particle radiation into visible images, e.g. fluoroscopic screens
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)
Abstract
668,854. Electron image tubes. WESTING- HOUSE ELECTRIC INTERNATIONAL CO. April 13, 1949 [May 8, 1948], No. 10020/49. Class 39 (i). [Also in Group XX] An image intensifier for use with X-rays comprises a first fluorescent screen 3 on which an image, e.g. an X-ray image, is produced, a photo-electric layer 8 for producing an electron image from this optical image, the photoelectric layer and the first fluorescent layer being disposed in close relationship and being carried on a transparent support member, and means for accelerating the electrons to a second fluorescent screen 9 the surface of which facing the photo-electric layer is coated with a layer 12 of material opaque to light but transparent to electrons of energy exceeding a predetermined value. The first fluorescent screen 3' may be of zinc sulphide with about 0.01 per cent of an activator and about 20 per cent of an alkali halide flux such as sodium chloride; it may be mounted on the glass end wall of the tube, the inner surface of which may have a transparent coating 5A of gold or silver on which the photo-electric layer 8 is deposited. The opaque layer 12 may be of aluminium, silver, or platinum which is preferably made non-reflecting for light on its free surface as by sulphiding it; alternatively the layer may be of carbon or colloidal graphite. The layer may have a thickness between 10<SP>-4</SP> and 10<SP>-5</SP> cm. Magnetic focusing coils 15, 16 may be provided. Reference has been directed by the Comptroller to Specification 652,451.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US668854XA | 1948-05-08 | 1948-05-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB668854A true GB668854A (en) | 1952-03-26 |
Family
ID=22072324
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB10020/49A Expired GB668854A (en) | 1948-05-08 | 1949-04-13 | Improvements in or relating to image intensifiers |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB668854A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3350594A (en) * | 1963-08-02 | 1967-10-31 | Emi Ltd | Image intensifier having continuous conducting layer between porous metallic coating and luminescent layer |
-
1949
- 1949-04-13 GB GB10020/49A patent/GB668854A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3350594A (en) * | 1963-08-02 | 1967-10-31 | Emi Ltd | Image intensifier having continuous conducting layer between porous metallic coating and luminescent layer |
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