CN2476876Y - Hard x-ray cathode image intensifier - Google Patents
Hard x-ray cathode image intensifier Download PDFInfo
- Publication number
- CN2476876Y CN2476876Y CN 01212968 CN01212968U CN2476876Y CN 2476876 Y CN2476876 Y CN 2476876Y CN 01212968 CN01212968 CN 01212968 CN 01212968 U CN01212968 U CN 01212968U CN 2476876 Y CN2476876 Y CN 2476876Y
- Authority
- CN
- China
- Prior art keywords
- ray
- image intensifier
- material layer
- hard
- negative electrode
- 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 - Fee Related
Links
- 239000010406 cathode material Substances 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims abstract description 8
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 7
- 239000010936 titanium Substances 0.000 claims abstract description 7
- 239000003513 alkali Substances 0.000 claims abstract description 5
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 7
- 229920006351 engineering plastic Polymers 0.000 claims description 4
- 238000001704 evaporation Methods 0.000 claims description 4
- 230000008020 evaporation Effects 0.000 claims description 4
- 150000002366 halogen compounds Chemical class 0.000 claims description 4
- 239000005355 lead glass Substances 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 238000000748 compression moulding Methods 0.000 claims description 3
- 238000007689 inspection Methods 0.000 abstract description 2
- 238000009659 non-destructive testing Methods 0.000 abstract description 2
- -1 halide compound Chemical class 0.000 abstract 1
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- LVYZJEPLMYTTGH-UHFFFAOYSA-H dialuminum chloride pentahydroxide dihydrate Chemical compound [Cl-].[Al+3].[OH-].[OH-].[Al+3].[OH-].[OH-].[OH-].O.O LVYZJEPLMYTTGH-UHFFFAOYSA-H 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000004020 luminiscence type Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 238000001771 vacuum deposition Methods 0.000 description 1
- 238000007738 vacuum evaporation Methods 0.000 description 1
Images
Landscapes
- Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)
Abstract
The utility model relates to a hard X-ray cathode image intensifier suitable for medical treatment, industrial nondestructive testing, safety inspection and other aspects, which is provided with a vacuum tube shell consisting of a titanium thin input window and a fluorescent screen output window, wherein a microchannel plate with an X-ray cathode material layer evaporated on an input surface is arranged in the tube shell, and the X-ray cathode material layer is an alkali halide compound material layer with the thickness of 0.2-0.5 mm and the relative density of more than 80%. The product has the characteristics of high output brightness, low flicker noise, high spatial resolution and the like.
Description
The utility model belongs to the x-ray Instrument technology field, relates to a kind of hard X-ray image intensifier, and its product can be suitable for using in the x-ray instrument of aspects such as medical treatment, industrial nondestructive testing and safety inspection.
Present X ray image intensifier than advanced version well known in the art, as in the ZL89221880.0 patent text, addressing the X ray image intensifier, because the cathode construction that is adopted is the CsI material of a kind of loose uniform density (relative density is 5%), need during its evaporation to fill argon gas about 10 holders to vacuum coating equipment, it is low to exist output brightness comparatively speaking, flicker noise reaches the low problem of spatial resolution greatly, thereby its product only can be applicable to the X ray detection [draw from J.E.Bateman " Advances in Electronicsand Electron Physics, Vol.52 (1979) "] of energy less than 10Kev.
The purpose of this utility model is to overcome the existing in prior technology deficiency, so provide a kind of rational in infrastructure, volume is little and hard X ray negative electrode image intensifier with higher output brightness and high-resolution.
Foregoing invention purpose of the present utility model is achieved by the special ZL89221880.0 technical pattern of prior art is made improvements, its architecture advances scheme is such: the microchannel plate (MCP) that is provided with evaporation X ray cathode material layer on the input face in a vacuum envelope with the thin input window of titanium and phosphor screen output window, post fluorescence coating at phosphor screen output window inner surface, be provided with lead glass outside output window, said X ray cathode material layer is that thickness is 80~100% alkali halogen compound material layer in 0.2~0.5mm and relative density.In the course of work, behind excitation of X-rays X ray cathode material, produce a large amount of once, secondary electron directly enters the passage of MCP, electronics is in the passage multiplication of MCP, its gain can reach 103~104 times, and these electronics emit from the output face of MCP, after electric field quickens, directly the impact fluorescence screen makes the phosphor screen luminescence imaging.
Below with reference to accompanying drawing behind the literary composition the utility model content is described further.This accompanying drawing is the structural principle schematic diagram of an embodiment of the utility model.
Referring to accompanying drawing, hard X ray negative electrode image intensifier described in the utility model mainly is made up of input titanium window 1, X ray negative electrode 2, microchannel plate 3, fluorescence coating 4, phosphor screen output window 5, lead glass 6, tile type power supply 9 and ABS engineering plastics shell 8 etc.Parts 1~5 constitute vacuum tube, X ray negative electrode 2 wherein is a kind ofly can directly X ray be changed into photoelectronic photoemissive material by what the close alkali halogen compound material (as CsI, KCl, KBr etc.) of unusual matter constituted, its method by vacuum evaporation is securely on the input face attached to microchannel plate 3, evaporation thickness is 0.2~0.5mm, and relative density is 80~100%.The lead glass of a 6~8mm is installed before phosphor screen output window 5; be used to protect the observer not to be subjected to radiohazard; outside vacuum envelope, be provided with shell 8 by ABS engineering plastics injection-compression molding; with silicone rubber insulation layer 7 embeddings, be exposed in the air in the middle of the shell 8 so that the electrode of the electronic device of all power supplys and image intensifier is unlikely.
Compared with prior art, the advantage that has of the utility model is:
One, the X ray negative electrode that adopts the unusual close alkali halogen compound material of matter to make, has higher absorption emission ratio for energy at the X ray of 40~100Kev, it effectively makes the output area at Φ 50~120m, and its image output brightness is at 40cd/m2More than, spatial resolution is greater than 41p/mm, and flicker is made an uproar Statement is aobvious to diminish, and picture contrast obviously improves.
Two, adopting titanium thin as input window, because titanium density is less relatively, improved the transmitance of X ray greatly, because titanium has mechanical preferably ductility, is again a kind of vacuum sealing material preferably therefore again.
Three, adopt miniature tile type power supply as the image intensifier working power, only need input 12V DC power supply, micro power offers image intensifier required voltages at different levels by inversion, multiplication of voltage, feedback circuit, makes its operate as normal.
Four, adopt the shell of ABS engineering plastics injection-compression molding, good looking appearance is generous, compact conformation, and booster inside is with epoxy sealing, good insulation preformance.
Claims (4)
1, a kind of hard X ray negative electrode image intensifier, it is characterized in that in a vacuum envelope with the thin input window (1) of titanium and phosphor screen output window (5), being provided with the microchannel plate (3) of evaporation X ray cathode material layer (2) on the input face, post fluorescence coating (4) at phosphor screen output window (5) inner surface, be provided with lead glass (6) outside output window (5), said X ray cathode material layer (2) is 80~100% alkali halogen compound material layer in 0.2~0.5mm and relative density for thickness.
2, hard X ray negative electrode image intensifier as claimed in claim 1 is characterized in that said X ray cathode material layer (2) made by the CsI material.
3, hard X ray negative electrode image intensifier as claimed in claim 1 is characterized in that adopting miniature tile type power supply (9) as the image intensifier working power.
4, hard X ray negative electrode image intensifier as claimed in claim 1 is characterized in that said vacuum ray field work shell places a shell by ABS engineering plastics injection-compression molding (8).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN 01212968 CN2476876Y (en) | 2001-01-21 | 2001-01-21 | Hard x-ray cathode image intensifier |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN 01212968 CN2476876Y (en) | 2001-01-21 | 2001-01-21 | Hard x-ray cathode image intensifier |
Publications (1)
Publication Number | Publication Date |
---|---|
CN2476876Y true CN2476876Y (en) | 2002-02-13 |
Family
ID=33632050
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN 01212968 Expired - Fee Related CN2476876Y (en) | 2001-01-21 | 2001-01-21 | Hard x-ray cathode image intensifier |
Country Status (1)
Country | Link |
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CN (1) | CN2476876Y (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101393053B (en) * | 2008-10-29 | 2010-04-07 | 西安理工大学 | Partial gating glimmer detector of image intensifier based on generation III proximity type at normal temperature |
CN101393052B (en) * | 2008-10-29 | 2010-06-02 | 西安理工大学 | Partial gating glimmer detector of image intensifier based on secondary generation inverted image at normal temperature |
CN102306601A (en) * | 2011-07-14 | 2012-01-04 | 北方夜视技术股份有限公司 | Image enhancer structure for removing phenomenon of outputting dark grids of optical fiber panel |
-
2001
- 2001-01-21 CN CN 01212968 patent/CN2476876Y/en not_active Expired - Fee Related
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101393053B (en) * | 2008-10-29 | 2010-04-07 | 西安理工大学 | Partial gating glimmer detector of image intensifier based on generation III proximity type at normal temperature |
CN101393052B (en) * | 2008-10-29 | 2010-06-02 | 西安理工大学 | Partial gating glimmer detector of image intensifier based on secondary generation inverted image at normal temperature |
CN102306601A (en) * | 2011-07-14 | 2012-01-04 | 北方夜视技术股份有限公司 | Image enhancer structure for removing phenomenon of outputting dark grids of optical fiber panel |
CN102306601B (en) * | 2011-07-14 | 2013-02-27 | 北方夜视技术股份有限公司 | Image enhancer structure for removing phenomenon of outputting dark grids of optical fiber panel |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
C19 | Lapse of patent right due to non-payment of the annual fee | ||
CF01 | Termination of patent right due to non-payment of annual fee |