CN105810281A - Chopper and back scatter imaging device - Google Patents
Chopper and back scatter imaging device Download PDFInfo
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- CN105810281A CN105810281A CN201610287351.4A CN201610287351A CN105810281A CN 105810281 A CN105810281 A CN 105810281A CN 201610287351 A CN201610287351 A CN 201610287351A CN 105810281 A CN105810281 A CN 105810281A
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- chopper
- imaging device
- back scattering
- wheel disc
- black light
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- 238000003384 imaging method Methods 0.000 title claims abstract description 63
- 230000005855 radiation Effects 0.000 claims description 33
- 230000006854 communication Effects 0.000 claims description 28
- 238000004891 communication Methods 0.000 claims description 27
- 238000000034 method Methods 0.000 claims description 17
- 239000000956 alloy Substances 0.000 claims description 11
- 229910017053 inorganic salt Inorganic materials 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 5
- 238000007639 printing Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 229910001385 heavy metal Inorganic materials 0.000 claims description 3
- 238000012360 testing method Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 10
- 229910001080 W alloy Inorganic materials 0.000 description 8
- 238000001514 detection method Methods 0.000 description 7
- 239000000835 fiber Substances 0.000 description 7
- 150000004820 halides Chemical class 0.000 description 7
- 229910000838 Al alloy Inorganic materials 0.000 description 4
- XQPRBTXUXXVTKB-UHFFFAOYSA-M caesium iodide Chemical compound [I-].[Cs+] XQPRBTXUXXVTKB-UHFFFAOYSA-M 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000000149 argon plasma sintering Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 238000002601 radiography Methods 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Classifications
-
- 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
- G21K1/00—Arrangements for handling particles or ionising radiation, e.g. focusing or moderating
- G21K1/02—Arrangements for handling particles or ionising radiation, e.g. focusing or moderating using diaphragms, collimators
- G21K1/04—Arrangements for handling particles or ionising radiation, e.g. focusing or moderating using diaphragms, collimators using variable diaphragms, shutters, choppers
- G21K1/043—Arrangements for handling particles or ionising radiation, e.g. focusing or moderating using diaphragms, collimators using variable diaphragms, shutters, choppers changing time structure of beams by mechanical means, e.g. choppers, spinning filter wheels
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V5/00—Prospecting or detecting by the use of ionising radiation, e.g. of natural or induced radioactivity
- G01V5/20—Detecting prohibited goods, e.g. weapons, explosives, hazardous substances, contraband or smuggled objects
- G01V5/22—Active interrogation, i.e. by irradiating objects or goods using external radiation sources, e.g. using gamma rays or cosmic rays
- G01V5/222—Active interrogation, i.e. by irradiating objects or goods using external radiation sources, e.g. using gamma rays or cosmic rays measuring scattered radiation
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- Physics & Mathematics (AREA)
- High Energy & Nuclear Physics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Geophysics (AREA)
- Analysing Materials By The Use Of Radiation (AREA)
Abstract
The invention provides a chopper and a back scatter imaging device.The chopper comprises a chopping wheel disc and a frequency controller, wherein the chopping wheel disc is provided with at least one arc-shaped slit, and the frequency controller is connected to the chopping wheel disc and used for controlling the chopping frequency of the chopping wheel disc and acquiring the chopping frequency set by a user.Through the technical scheme, the modulation characteristic of the chopper is improved; when the chopper is applied to the back scatter imaging device, the imaging quality and real-time imaging efficiency of the back scatter imaging device are improved.
Description
Technical field
The present application relates to detection equipment technical field, in particular to a kind of chopper and a kind of back scattering imaging device.
Background technology
In the related, back scattering imaging technology is widely used in customs's safety check and border detection, specifically, the light source of back scattering imaging instrument produces black light, when black light is to testee, can according to the scattering of the material of testee and density generation different situations, the detector of back scattering imaging instrument dynamically collection of scattered light, to generate backscatter images.
In correlation technique, the poor dynamic of back scattering imaging technology, resolution is low, the poor contrast of testee and background image, and image taking speed is slow, is unfavorable for improving detection efficiency.
Therefore, a kind of new back scattering imaging scheme how is designed to overcome drawbacks described above to become technical problem urgently to be resolved hurrily.
Summary of the invention
The present patent application be based on above-mentioned technical problem at least one, propose a kind of new back scattering imaging scheme, specifically include a kind of chopper suitable in back scattering imaging device and a kind of back scattering imaging device, by arranging arcuate slots on copped wave wheel disc, and regulate chopping frequency by frequency controller, control the frequency of back scattering imaging process, improve dynamic resolution and the real-time of back scattering imaging process.
In view of this, the embodiment of the first aspect of the present patent application, it is proposed that a kind of chopper, including: copped wave wheel disc, it is provided with at least one arcuate slots；Frequency controller, is connected to copped wave wheel disc, for controlling the chopping frequency of copped wave wheel disc, and obtains the chopping frequency that user sets.
In this technical scheme, by arranging arcuate slots on copped wave wheel disc, and regulate chopping frequency by frequency controller, control the frequency of back scattering imaging process, improve dynamic resolution and the real-time of back scattering imaging process.
Wherein, X ray is generally adopted due to black light, so in order to realize dynamic modulation, copped wave wheel disc generally adopts tungsten alloy plate, and being provided with on tungsten alloy plate a plurality of has arcuate slots, and every arcuate slots is the involute extended from the center of circle of copped wave wheel disc to circumference, X ray penetrates copped wave wheel disc only by arcuate slots, thus realize the chopping modulation of X ray, and then when copped wave wheel disc is applied to back scattering imaging, it is possible to improve dynamic resolution and the real-time of back scattering imaging.
In technique scheme, it is preferable that including: arcuate slots is to be extended to the involute of chopper wheel plate edge by the center of circle of copped wave wheel disc, and the printing opacity direction of involute is consistent with the direction of propagation of the black light of back scattering imaging device.
In this technical scheme, it is extended to the involute of chopper wheel plate edge by the center of circle of copped wave wheel disc by arranging arcuate slots, especially the printing opacity direction of involute is consistent with the direction of propagation of the black light of back scattering imaging device, improves black light and penetrates the efficiency of arcuate slots.
Wherein, the seam width of every arcuate slots of annular period profile ranges for 0.33-0.38mm.
In any of the above-described technical scheme, it is preferable that the seam of arcuate slots is wide ranges for 0.1～0.5mm.
In any of the above-described technical scheme, it is preferable that the seam width of arcuate slots ranges for 0.33-0.38mm.
In any of the above-described technical scheme, it is preferable that the numerical range of chopping frequency is 1000～9000Hz.
In any of the above-described technical scheme, it is preferable that the radiation areas of described copped wave wheel disc are provided with heavy metal alloy sheet material.
In any of the above-described technical scheme, it is preferable that the main body of copped wave wheel disc is aluminum alloy materials, and the radiation areas of copped wave wheel disc are coated with tungsten alloy material.
In this technical scheme, being aluminum alloy materials by selecting the main body of copped wave wheel disc, reduce the manufacturing cost of chopper, meanwhile, the radiation areas of copped wave wheel disc are coated with tungsten alloy material, improve black light modulation effect.
The embodiment of the second aspect of the present patent application, it is proposed that a kind of back scattering imaging device, including: radiation generator, it is used for producing black light；Such as the chopper that above-mentioned any one technical scheme limits, chopper is arranged on the emitting light path of black light, and black light is modulated into the black light ray of assigned frequency by arcuate slots, and wherein, chopping frequency and assigned frequency are positively related；Collimator, is arranged between radiation generator and chopper；Detector, and the same side that radiation generator is arranged at back scattering imaging device, for detecting the black light ray reflected through object to be imaged, and black light ray is converted to corresponding picture signal.
In this technical scheme, include radiation generator, chopper, collimator and detector by arranging back scattering imaging device, it is achieved that the chopping modulation to black light, and then improve dynamic resolution and imaging efficiency.
Wherein, the particle after detector detection black light scattering, and by cesium iodide inorganic salt scintillator structure (CsI), black light is converted to visible ray, further, adopt photoelectric device such as SiPMT device generation backscatter images.
In any of the above-described technical scheme, it is preferable that detector includes: wireless sending module, for picture signal is sent to corresponding image display interfaces；Wireless receiving module, obtains picture signal by the wireless channel between wireless sending module, to generate backscatter images and to be prompted to user.
In this technical scheme, include wireless sending module and wireless receiving module by arranging detector, it is achieved that being wirelessly transferred of backscatter images, improve detection efficiency and reliability.
In any of the above-described technical scheme, preferably, wireless sending module includes at least one in the first bluetooth communication, a Wi-Fi communication module and the first micro-cell communication module, wireless receiving module includes the 2nd Wi-Fi communication module of the second bluetooth communication with the first bluetooth communication cooperating and a Wi-Fi communication module cooperating, and with at least one in the second micro-cell communication module of the first micro-cell communication module cooperating.
In any of the above-described technical scheme, it is preferable that also include: radiation generator controls module, is connected to radiation generator, for controlling the duty of radiation generator；Monitoring module, is connected to detector, for determining duty and the imaging process of detector, and is prompted to user.
In this technical scheme, control module by arranging radiation generator, improve the controllability of radiation generator, it addition, detector is monitored by monitoring module, and be prompted to user, improve the intuitively handling of back scattering imaging device.
In any of the above-described technical scheme, it is preferable that detector also includes: visible ray modular converter, it is connected to the test surface of detector, so that the black light reflected through object to be imaged ray is converted to visible light rays；Photoelectric sensor, is connected to visible ray modular converter, for visible light rays is converted to the signal of telecommunication, to be generated as picture signal, wherein, it is seen that light modular converter includes cesium iodide inorganic salt scintillator structure and/or ba halides scintillator structure.
In this technical scheme, ba halides scintillator structure includes BaFCl:Eu scintillator structure, BaFI:Eu scintillator structure, BaBrI:Eu scintillator structure and BaCsI:Eu scintillator structure.
By above technical scheme, by arranging arcuate slots on copped wave wheel disc, and regulate chopping frequency by frequency controller, control the frequency of back scattering imaging process, improve dynamic resolution and the real-time of back scattering imaging process.
Accompanying drawing explanation
Fig. 1 illustrates the schematic diagram of the chopper of the embodiment according to the present patent application；
Fig. 2 illustrates the schematic diagram of the back scattering imaging device of an embodiment according to the present patent application；
Fig. 3 illustrates the schematic diagram of the back scattering imaging device of another embodiment according to the present patent application；
Fig. 4 illustrates the schematic diagram of the back scattering imaging device of another embodiment according to the present patent application；
Fig. 5 illustrates the schematic diagram of the detector of an embodiment according to the present patent application；
Fig. 6 illustrates the schematic diagram of the detector of another embodiment according to the present patent application.
Detailed description of the invention
In order to be more clearly understood that the above-mentioned purpose of the present patent application, feature and advantage, below in conjunction with the drawings and specific embodiments, the present patent application is further described in detail.It should be noted that when not conflicting, embodiments herein and the feature in embodiment can be mutually combined.
Elaborate a lot of detail in the following description so that fully understanding the present patent application; but; the present patent application can also adopt third party to be different from third party's mode described here to implement, and therefore, the protection domain of the present patent application is by the restriction of following public specific embodiment.
Fig. 1 illustrates the schematic diagram of the chopper of the embodiment according to the present patent application.
As it is shown in figure 1, the chopper 100 of the embodiment according to the present patent application, including: copped wave wheel disc 102, it is provided with at least one arcuate slots 104；Frequency controller, is connected to copped wave wheel disc 102, for controlling the chopping frequency of copped wave wheel disc 102, and obtains the chopping frequency that user sets.
In this technical scheme, by arranging arcuate slots 104 on copped wave wheel disc 102, and regulate chopping frequency by frequency controller, control the frequency of back scattering imaging process, improve dynamic resolution and the real-time of back scattering imaging process.Chopper 100 is assembled in controller by centre bore 106 and edge assembly hole 108.
Wherein, X ray is generally adopted due to black light, so in order to realize dynamic modulation, copped wave wheel disc 102 generally adopts tungsten alloy plate, being provided with on tungsten alloy plate a plurality of has arcuate slots 104, every arcuate slots 104 is the involute extended from the center of circle of copped wave wheel disc 102 to circumference, X ray penetrates copped wave wheel disc 102 only by arcuate slots 104, thus realizing the chopping modulation of X ray, and then when copped wave wheel disc 102 is applied to back scattering imaging, it is possible to improve dynamic resolution and the real-time of back scattering imaging.
In technique scheme, it is preferable that including: arcuate slots 104 is to be extended to the involute at copped wave wheel disc 102 edge by the center of circle of copped wave wheel disc 102, and the printing opacity direction of involute is consistent with the direction of propagation of the black light of back scattering imaging device.
In this technical scheme, it is extended to the involute at copped wave wheel disc 102 edge by the center of circle of copped wave wheel disc 102 by arranging arcuate slots 104, especially the printing opacity direction of involute is consistent with the direction of propagation of the black light of back scattering imaging device, improves black light and penetrates the efficiency of arcuate slots 104.
In any of the above-described technical scheme, it is preferable that the seam of arcuate slots 104 is wide ranges for 0.1～0.5mm.
In any of the above-described technical scheme, it is preferable that the seam width of arcuate slots 104 ranges for 0.33-0.38mm.
In any of the above-described technical scheme, it is preferable that the numerical range of chopping frequency is 1000～9000Hz.
In any of the above-described technical scheme, it is preferable that the radiation areas of described copped wave wheel disc 102 are provided with heavy metal alloy sheet material.
In any of the above-described technical scheme, it is preferable that the main body of copped wave wheel disc 102 is aluminum alloy materials, and the radiation areas of copped wave wheel disc 102 are coated with tungsten alloy material.
In this technical scheme, being aluminum alloy materials by selecting the main body of copped wave wheel disc 102, reduce the manufacturing cost of chopper 100, meanwhile, the radiation areas of copped wave wheel disc 102 are coated with tungsten alloy material, improve black light modulation effect.
Fig. 2 to Fig. 4 illustrates the schematic diagram of the back scattering imaging device of the embodiment according to the present patent application.
As shown in Figures 2 to 4, the back scattering imaging device according to the embodiment of the present patent application, including: radiation generator 200, it is provided with ray machine 302, is used for producing black light；Such as the chopper 100 that above-mentioned any one technical scheme limits, chopper 100 is arranged on the emitting light path of black light, and black light is modulated into the black light ray of assigned frequency by arcuate slots 104, and wherein, chopping frequency and assigned frequency are positively related；Collimator (includes 0 grade of collimator 304A and 1 grade of collimator 304B), is arranged between radiation generator 200 and chopper 100；Detector, and the same side that radiation generator 200 is arranged at back scattering imaging device, for detecting the black light ray reflected through object to be imaged, and black light ray is converted to corresponding picture signal.
In this technical scheme, include radiation generator 200, chopper 100, collimator and detector by arranging back scattering imaging device, it is achieved that the chopping modulation to black light, and then improve dynamic resolution and imaging efficiency.Incidence end at collimator is provided with ray machine 302, to provide black light.Copped wave wheel disc 100 controls to rotate by motor 306.It addition, the arranged outside of copped wave wheel disc 100 has a pair fibre optic plate 308, wherein, the centre of a pair fibre optic plate 308 is provided with slit, and slit edges is provided with barricade 310.
Specifically, black light, in communication process, sequentially passes through 0 grade of collimator 304A, 1 grade of collimator 304B and arcuate slots 104, defines the reciprocal uniform motion hot spot consistent with 1 grade of collimator 304B track.
Wherein, radiation generator 200 can adopt Mini radiography unit, radiographic source highest energy to be 90keV, and tube current is less than 500 μ A.Particle after detector detection black light scattering, and by cesium iodide inorganic salt scintillator structure (CsI), black light is converted to visible ray, further, detector can adopt photoelectric device such as SiPMT device generation backscatter images.
In any of the above-described technical scheme, it is preferable that detector includes: wireless sending module, for picture signal is sent to corresponding image display interfaces；Wireless receiving module, obtains picture signal by the wireless channel between wireless sending module, to generate backscatter images and to be prompted to user.
In this technical scheme, include wireless sending module and wireless receiving module by arranging detector, it is achieved that being wirelessly transferred of backscatter images, improve detection efficiency and reliability.
In any of the above-described technical scheme, preferably, wireless sending module includes at least one in the first bluetooth communication, a Wi-Fi communication module and the first micro-cell communication module, wireless receiving module includes the 2nd Wi-Fi communication module of the second bluetooth communication with the first bluetooth communication cooperating and a Wi-Fi communication module cooperating, and with at least one in the second micro-cell communication module of the first micro-cell communication module cooperating.
In any of the above-described technical scheme, it is preferable that also include: radiation generator 200 controls module, it is connected to radiation generator 200, for controlling the duty of radiation generator 200；Monitoring module, is connected to detector, for determining duty and the imaging process of detector, and is prompted to user.
In this technical scheme, control module by arranging radiation generator 200, improve the controllability of radiation generator 200, it addition, detector is monitored by monitoring module, and be prompted to user, improve the intuitively handling of back scattering imaging device.
In any of the above-described technical scheme, it is preferable that detector also includes: visible ray modular converter, it is connected to the test surface of detector, so that the black light reflected through object to be imaged ray is converted to visible light rays；Photoelectric sensor, is connected to visible ray modular converter, for visible light rays is converted to the signal of telecommunication, to be generated as picture signal, wherein, it is seen that light modular converter includes cesium iodide inorganic salt scintillator structure and/or ba halides scintillator structure.
In this technical scheme, ba halides scintillator structure includes BaFCl:Eu scintillator structure, BaFI:Eu scintillator structure, BaBrI:Eu scintillator structure and BaCsI:Eu scintillator structure.
Fig. 5 illustrates the schematic diagram of the detector of an embodiment according to the present patent application.
As it is shown in figure 5, the detector 500 according to an embodiment of the present patent application includes: double-deck ba halides scintillation screen 502；Ripple shifting fiber (504A and 504B as shown in Figure 5), ripple shifting fiber is arranged in the interlayer between double-deck ba halides scintillation screen 502；Two probe portions (506A and 506B as shown in Figure 5), are respectively connecting to ripple shifting fiber.
Fig. 6 illustrates the schematic diagram of the detector of another embodiment according to the present patent application.
As shown in Figure 6; the detector of another embodiment according to the present patent application; including: ripple shifting fiber 504; double-deck ba halides scintillation screen, every layer of scintillation screen is disposed with protective layer 5022, inorganic salt scintillator structure 5024, reflecting layer 5026 and substrate 5028 from the laterally outside near ripple shifting fiber 504.
The technical scheme of the present patent application is described in detail above in association with accompanying drawing, consider how correlation technique improves the technical problem of the dynamic resolution of back scattering imaging device, the present patent application proposes a kind of new back scattering imaging scheme, specifically include a kind of chopper suitable in back scattering imaging device and a kind of back scattering imaging device, by arranging arcuate slots on copped wave wheel disc, and regulate chopping frequency by frequency controller, control the frequency of back scattering imaging process, improve dynamic resolution and the real-time of back scattering imaging process.
The foregoing is only the preferred embodiment of the present patent application, be not limited to the present patent application, for a person skilled in the art, the present patent application can have various modifications and variations.Within all spirit in the present patent application and principle, any amendment of making, equivalent replacement, improvement etc., should be included within the protection domain of the present patent application.
Claims (10)
1. a chopper, it is adaptable to back scattering imaging device, it is characterised in that including:
Copped wave wheel disc, is provided with at least one arcuate slots；
Frequency controller, is connected to described copped wave wheel disc, for controlling the chopping frequency of described copped wave wheel disc, and obtains the chopping frequency that user sets.
2. chopper according to claim 1, it is characterised in that including:
Described arcuate slots is to be extended to the involute of described chopper wheel plate edge by the center of circle of described copped wave wheel disc, and the printing opacity direction of described involute is consistent with the direction of propagation of the black light of described back scattering imaging device.
3. chopper according to claim 1, it is characterised in that
The seam of described arcuate slots is wide ranges for 0.1～0.5mm.
4. chopper according to claim 3, it is characterised in that
The seam width of described arcuate slots ranges for 0.33-0.38mm.
5. chopper according to any one of claim 1 to 4, it is characterised in that the radiation areas of described radiation areas copped wave wheel disc are provided with heavy metal alloy sheet material.
6. a back scattering imaging device, it is characterised in that including:
Radiation generator, is used for producing black light；
Chopper as according to any one of claim 1 to 5, described chopper is arranged on the emitting light path of described black light, described black light is modulated into the black light ray of assigned frequency by described arcuate slots, and wherein, described chopping frequency and described assigned frequency are positively related；
Collimator, is arranged between described radiation generator and described chopper；
Detector, and the same side that described radiation generator is arranged at described back scattering imaging device, for detecting the black light ray reflected through object to be imaged, and described black light ray is converted to corresponding picture signal.
7. back scattering imaging device according to claim 6, it is characterised in that described detector includes:
Wireless sending module, for sending described picture signal to corresponding image display interfaces；
Wireless receiving module, obtains described picture signal by the wireless channel between described wireless sending module, to generate backscatter images and to be prompted to user.
8. back scattering imaging device according to claim 6, it is characterized in that, described wireless sending module includes at least one in the first bluetooth communication, a Wi-Fi communication module and the first micro-cell communication module, described wireless receiving module includes and the 2nd Wi-Fi communication module of the second bluetooth communication of described first bluetooth communication cooperating and a described Wi-Fi communication module cooperating, and with at least one in the second micro-cell communication module of the first micro-cell communication module cooperating.
9. back scattering imaging device according to claim 6, it is characterised in that also include:
Radiation generator controls module, is connected to described radiation generator, for controlling the duty of described radiation generator；
Monitoring module, is connected to described detector, for determining duty and the imaging process of described detector, and is prompted to user.
10. the back scattering imaging device according to any one of claim 6 to 9, it is characterised in that described detector also includes:
Visible ray modular converter, is connected to the test surface of described detector, so that the black light ray reflected through described object to be imaged is converted to visible light rays；
Photoelectric sensor, is connected to described visible ray modular converter, for described visible light rays is converted to the signal of telecommunication, to be generated as described picture signal,
Wherein, described visible ray modular converter includes inorganic salt scintillator structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610287351.4A CN105810281A (en) | 2016-05-03 | 2016-05-03 | Chopper and back scatter imaging device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610287351.4A CN105810281A (en) | 2016-05-03 | 2016-05-03 | Chopper and back scatter imaging device |
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| CN105810281A true CN105810281A (en) | 2016-07-27 |
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| CN201610287351.4A Pending CN105810281A (en) | 2016-05-03 | 2016-05-03 | Chopper and back scatter imaging device |
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| CN (1) | CN105810281A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018233456A1 (en) * | 2017-06-20 | 2018-12-27 | 同方威视技术股份有限公司 | Backscatter detection module |
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| EP1772874B1 (en) * | 2005-10-06 | 2009-01-14 | Bundesanstalt Für Materialforschung Und -Prufung (Bam) | Focal point oriented aperture |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2018233456A1 (en) * | 2017-06-20 | 2018-12-27 | 同方威视技术股份有限公司 | Backscatter detection module |
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Application publication date: 20160727 |