CN2107061U - Large-scale x-ray image intensifier - Google Patents
Large-scale x-ray image intensifier Download PDFInfo
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- CN2107061U CN2107061U CN 91227072 CN91227072U CN2107061U CN 2107061 U CN2107061 U CN 2107061U CN 91227072 CN91227072 CN 91227072 CN 91227072 U CN91227072 U CN 91227072U CN 2107061 U CN2107061 U CN 2107061U
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Abstract
The utility model relates to a large-scale X-ray image intensifier. The inner part of the intensifier which is composed of a fluoroscopic screen, a pipe shell and a titan window is vacuum more than 10 + <-6 > mm Hg, and getter is filled in the intensifier. Inner parts are a titan window, a photoelectric cathode, a microchannel plate and the fluoroscopic screen which are arranged in sequence, and the utility model can be made into a three-electrode structure and a four-electrode structure. The size of a clear aperture can be made into about 100 mm, and the utility model has the advantages of high gain and clear image. A handy X-ray diagnosis instrument made of the utility model has important functions in medical, industry flaw detection, etc. Needed dose of the X-ray is only one percent of the existing medical application X-ray machines. A human body does not need protection, and the utility model can be operated under the condition without dark rooms.
Description
The utility model belongs to the improvement of photoelectronic imaging device.
U.S. Lixi company utilized the NASA.4142101 patent to be ground into a kind of light-duty x-ray instrument in 1984, and X light image conversion and enhancing in the instrument are to adopt the flicker conversion screen that X light image is converted to the visible light image, are coupled on the visible light casting image intensifier again.This conversion exists shortcomings such as conversion efficiency is low, cost is high, poor safety performance, and the diameter of casting image intensifier has only about 50mm, influences the result of use and the scope of instrument.The purpose of this utility model is to design a kind of large-sized X-ray casting image intensifier, substitute flicker conversion screen and visible light casting image intensifier, with conversion efficiency and the visual spatial resolution that improves X light image, enlarge the scope of application of instrument, improve its fail safe and useful life.
Know-why of the present utility model is, employing is a photocathode to the material (as cesium iodide) of the high quantum yield of X-ray sensitivity, directly convert X-ray to visible light, again after microchannel plate (MCP) multiplication, but electron image is converted to the optical image of Direct observation and record by phosphor screen.Adopt microchannel plate as electron multiplier, it has the characteristics of rapid and high electron gain of response time, and its each micro channel is equivalent to an independently electron multiplier, pixel of a passage correspondence when being used for electron image and strengthening.
Accompanying drawing 1 is the structural representation of the designed X-ray casting image intensifier of the utility model (four electrodes), and accompanying drawing 2 is three designed electrode X-ray casting image intensifier electrode structure schematic diagrames, and accompanying drawing 3 is four designed electrode X-ray casting image intensifier electrode structure schematic diagrames.1 is phosphor screen among the figure, and 2 is getter, and 3 is shell, 4 is titanium window (titanium is to the transmitance height of X-ray), and 5 is microchannel plate (MCP), and 6 is cathode branch pushing out ring (cathode substrate), 7 is retainer ring, and 8 are steam vent (treating to shut after booster inside vacuumizes), and 9 is photocathode.
Of the present utility model being characterised in that, the X-ray casting image intensifier inner space that is made of phosphor screen, shell and titanium window is 10
-6The vacuum that mmHg is above; Nonevaporable getter is set in it; The parts of X-ray casting image intensifier inside and put in order (being that X-ray sees through the imaging order) thereof are titanium window, photocathode, microchannel plate, phosphor screen.Its phosphor screen is to adopt the gravitational settling method that the yellow-green fluorescence powder is deposited on the fluoroscopic glass substrate, and nonevaporable getter can be selected zirconium aluminium or zircon China ink etc. for use.
The designed X-ray casting image intensifier of the utility model is divided into three electrodes and two kinds of structures of four electrodes, three-electrode structure as shown in Figure 2, be with photoelectric cathode materials setting (evaporation) on the input face of microchannel plate, be characterized in the image the spatial resolution height; Four electrode structures as shown in Figure 3, be with photoelectric cathode materials setting (evaporation) in cathode substrate by on the face of MCP, as an electrode independently, be characterized in that gain is high, can further reduce to have an X-rayed required X-ray dosage.Retainer ring is used for fixing cathode substrate.Cathode substrate can select for use aluminum to make.
Because the work area of the more existing X-ray casting image intensifier of the utility model is big, diameter can be about 100mm, so can constitute multiple x-ray and nondestructive detecting instrument.Be used for aspects such as the safety inspection of medical treatment, industrial flaw detection, military first aid, customs, public security, post and telecommunications and microelectronics industry.Adopt designed X-ray casting image intensifier (the clear aperature 100mm of the utility model; four electrode structures); produce a kind of portable x-ray instrument; (its X-ray bulb voltage 35-70KV; 80 microamperes in electric current; photocathode is zero volt, and very 1000-1300 volt is exported in very 300 volts of microchannel plate inputs; screen voltage is 5-7KV); be used to have an X-rayed adult thighbone and electronic device integrated package, the gained clear image, inner fine structure can both be observed clear; the input dosage of its X-ray only is one of percentage of existing medical x-ray machine dosage; within legal dosage range, human body need not protection, works equally under the condition in no darkroom.
Claims (4)
1, a kind of X-ray casting image intensifier, of the present utility model being characterised in that: the booster inner space that is made of phosphor screen, shell and titanium window is 10
-6The vacuum that mmHg is above, it is built-in with nonevaporable getter, its inner parts and puts in order and is titanium window, photocathode, microchannel plate, phosphor screen.
2, booster according to claim 1 is characterized in that: photocathode is arranged on the input face of microchannel plate, constitutes the booster of three-electrode structure.
3, booster according to claim 1 is characterized in that: photocathode is arranged on cathode substrate between microchannel plate and the titanium window by on the face of microchannel plate, as an electrode independently, constitutes the booster of four electrode structures.
4, according to claim 1,2,3 described boosters, it is characterized in that: its logical light diameter can be fabricated into about 100mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91227072 CN2107061U (en) | 1991-10-19 | 1991-10-19 | Large-scale x-ray image intensifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91227072 CN2107061U (en) | 1991-10-19 | 1991-10-19 | Large-scale x-ray image intensifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2107061U true CN2107061U (en) | 1992-06-10 |
Family
ID=4933033
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91227072 Granted CN2107061U (en) | 1991-10-19 | 1991-10-19 | Large-scale x-ray image intensifier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2107061U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1042774C (en) * | 1993-04-08 | 1999-03-31 | 中国科学院西安光学精密机械研究所 | X-ray image intensifier |
| CN102478660A (en) * | 2010-11-26 | 2012-05-30 | 中国科学院大连化学物理研究所 | Modular charged particle two-dimensional imaging detector |
| CN101842867B (en) * | 2007-09-24 | 2013-03-27 | 诺瓦特安斯集团有限公司 | Image sensor cell for night vision |
-
1991
- 1991-10-19 CN CN 91227072 patent/CN2107061U/en active Granted
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1042774C (en) * | 1993-04-08 | 1999-03-31 | 中国科学院西安光学精密机械研究所 | X-ray image intensifier |
| CN101842867B (en) * | 2007-09-24 | 2013-03-27 | 诺瓦特安斯集团有限公司 | Image sensor cell for night vision |
| CN102478660A (en) * | 2010-11-26 | 2012-05-30 | 中国科学院大连化学物理研究所 | Modular charged particle two-dimensional imaging detector |
| CN102478660B (en) * | 2010-11-26 | 2013-07-24 | 中国科学院大连化学物理研究所 | Modular charged particle two-dimensional imaging detector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |