GB811157A - Improvements in or relating to radiographic devices for use with x-rays and like penetrating rays - Google Patents
Improvements in or relating to radiographic devices for use with x-rays and like penetrating raysInfo
- Publication number
- GB811157A GB811157A GB1498256A GB1498256A GB811157A GB 811157 A GB811157 A GB 811157A GB 1498256 A GB1498256 A GB 1498256A GB 1498256 A GB1498256 A GB 1498256A GB 811157 A GB811157 A GB 811157A
- Authority
- GB
- United Kingdom
- Prior art keywords
- foils
- foil
- radiation
- rays
- fluorescent
- 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
- 230000000149 penetrating effect Effects 0.000 title 1
- 239000011888 foil Substances 0.000 abstract 25
- 239000000126 substance Substances 0.000 abstract 12
- 230000005855 radiation Effects 0.000 abstract 10
- 230000035945 sensitivity Effects 0.000 abstract 4
- 239000005083 Zinc sulfide Substances 0.000 abstract 3
- 230000000694 effects Effects 0.000 abstract 3
- DRDVZXDWVBGGMH-UHFFFAOYSA-N zinc;sulfide Chemical compound [S-2].[Zn+2] DRDVZXDWVBGGMH-UHFFFAOYSA-N 0.000 abstract 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 abstract 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 abstract 2
- 238000010521 absorption reaction Methods 0.000 abstract 2
- 229910052791 calcium Inorganic materials 0.000 abstract 2
- 239000011575 calcium Substances 0.000 abstract 2
- 230000003247 decreasing effect Effects 0.000 abstract 2
- 239000000203 mixture Substances 0.000 abstract 2
- PBYZMCDFOULPGH-UHFFFAOYSA-N tungstate Chemical compound [O-][W]([O-])(=O)=O PBYZMCDFOULPGH-UHFFFAOYSA-N 0.000 abstract 2
- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 abstract 1
- 206010070834 Sensitisation Diseases 0.000 abstract 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 abstract 1
- 230000004913 activation Effects 0.000 abstract 1
- 239000000654 additive Substances 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 229910052759 nickel Inorganic materials 0.000 abstract 1
- 230000035515 penetration Effects 0.000 abstract 1
- 239000011669 selenium Substances 0.000 abstract 1
- 229910052711 selenium Inorganic materials 0.000 abstract 1
- 239000004065 semiconductor Substances 0.000 abstract 1
- 230000008313 sensitization Effects 0.000 abstract 1
- ADZWSOLPGZMUMY-UHFFFAOYSA-M silver bromide Chemical compound [Ag]Br ADZWSOLPGZMUMY-UHFFFAOYSA-M 0.000 abstract 1
- 239000011701 zinc Substances 0.000 abstract 1
- 229910052725 zinc Inorganic materials 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
- G03C5/00—Photographic processes or agents therefor; Regeneration of such processing agents
- G03C5/16—X-ray, infrared, or ultraviolet ray processes
- G03C5/17—X-ray, infrared, or ultraviolet ray processes using screens to intensify X-ray images
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Conversion Of X-Rays Into Visible Images (AREA)
- Luminescent Compositions (AREA)
- Silver Salt Photography Or Processing Solution Therefor (AREA)
Abstract
811,157. X-ray apparatus, SIEMENSREINIGER-WERKE A.G. May 14, 1956 [May 14, 1955], No. 14982/56. Drawings to Specification. Class 98(1) In a radiographic device for use with X- rays or the like consisting of a number of light-sensitive layers one behind the other and intensifier foils containing fluorescent substances interleaved therewith, at least the foils of a group disposed in the part of the device next to the radiation source and have amounts of florescent substance per unit area reduced below the amounts required for maximum intensifying effect (preferably below 40 mg./sq. cm.), to an extent sufficient to reduce substantially the absorption of radiation by each foil and means are provided for so varying the light emitting properties of the foils or the sensitivity of the layers without substantially affecting the penetration of the radiation, as to produce uniform exposure of the light-sensitive layers when they are simultaneously exposed to radiation. The lightsensitive layers may consist of photographic film, or of selenium or a like semiconductor. The intensifier foils are coated with equal amounts of fluorescent substance per unit area, preferably less than 30 mg. of fluorescent substance per sq. cm. The effect of decreasing intensity of the radiation as it penetrates one foil after another is compensated by making the intensifying effect of the foils decrease with decreasing distance from the source of radiation in one of the following ways: (1) by adding "killer" substances, e.g. nickel additives, in amounts varying from foil to foil; (2) by varying the mean grain size of the fluorescent material from foil to foil; (3) by using in different foils similar substances of different activation; and (4) by using a mixture of two fluorescent substances (of different grain size or of different chemical composition) of different sensitivity and varying the proportion of the more sensitive substance to the less sensitive substance from foil to foil. Alternatively, the foils may be similar and the sensitivity of the light-sensitive layers may be varied from layer to layer. In photographic layers, the sensitivity variation is obtained by varying the degree of ripeness, the sensitization to the light emitted by the intensifier foils, or the silver bromide content. Each layer may have intensifier foils on both sides, -but preferably there is one foil only for each layer, placed at the side, of the layer remote from the radiation source. The remote side of each foil may be coated with a substance which partially absorbs and partially reflects the fluorescent light, and the degree of absorption and reflection may decrease and increase respctively with increasing distance from the source of radiation. It is preferable to use fluorescent substances containing elments of low atomic number, such as zinc-activated or or silver-activited zinc sulphide, for softer radiation; since the rays become harder as they penetrate successive foils the foils may contain elements of increasing atomic weight with increasing distance from the radiation source. When X-rays of energies greater than 100 Kv are used, the nearer foils may consist of zinc sulphide, while the further foils consist of calcium tungstate or lead-barium tungstate. When the X-rays have energies less than 100 Kv, it is preferable to use calcium tungstate for the nearer foils and zinc sulphide for the further foils.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DES43948A DE1019173B (en) | 1955-05-14 | 1955-05-14 | An arrangement consisting of radiation-sensitive and amplifier layers for the simultaneous production of several photographic images in just one exposure process |
Publications (1)
Publication Number | Publication Date |
---|---|
GB811157A true GB811157A (en) | 1959-04-02 |
Family
ID=7484941
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1498256A Expired GB811157A (en) | 1955-05-14 | 1956-05-14 | Improvements in or relating to radiographic devices for use with x-rays and like penetrating rays |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE1019173B (en) |
GB (1) | GB811157A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1114043B (en) * | 1960-06-30 | 1961-09-21 | Foerderung Forschung Gmbh | Device for increasing the intensity of an optically generated image |
EP1271239A3 (en) * | 2001-06-28 | 2003-02-12 | Eastman Kodak Company | Portal imaging assembly with pair of asymmetric screens and method of use |
-
1955
- 1955-05-14 DE DES43948A patent/DE1019173B/en active Pending
-
1956
- 1956-05-14 GB GB1498256A patent/GB811157A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1114043B (en) * | 1960-06-30 | 1961-09-21 | Foerderung Forschung Gmbh | Device for increasing the intensity of an optically generated image |
EP1271239A3 (en) * | 2001-06-28 | 2003-02-12 | Eastman Kodak Company | Portal imaging assembly with pair of asymmetric screens and method of use |
Also Published As
Publication number | Publication date |
---|---|
DE1019173B (en) | 1957-11-07 |
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