CN102004087B - Transmission type Terahertz wave real-time image scanning device - Google Patents
Transmission type Terahertz wave real-time image scanning device Download PDFInfo
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- CN102004087B CN102004087B CN2010102999125A CN201010299912A CN102004087B CN 102004087 B CN102004087 B CN 102004087B CN 2010102999125 A CN2010102999125 A CN 2010102999125A CN 201010299912 A CN201010299912 A CN 201010299912A CN 102004087 B CN102004087 B CN 102004087B
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Abstract
The invention discloses a transmission type Terahertz wave real-time image scanning device, which comprises a polyhedral drum, a Terahertz lens, a Terahertz detector, a front amplifier, a data acquisition card, a camera, an image acquisition card and an imaging unit, wherein the polyhedral drum rotates around the rotating shaft of the polyhedral drum and swings reciprocally around the swinging shaft of the polyhedral drum and is used for irradiating and/or reflecting the Terahertz waves of a target to be scanned onto the Terahertz lens; the Terahertz lens is used for converging the Terahertz waves onto the Terahertz detector; the Terahertz detector is used for converting the Terahertz waves into a voltage signal; the front amplifier is used for filtering and amplifying the voltage signal; the data acquisition card is used for performing the A/D conversion of the output signal of the front amplifier and data acquisition to obtain a digital signal; the camera is used for acquiring the optical image of the target to be scanned; the image acquisition card is used for acquiring the image to obtain a digital image signal; and the imaging unit is used for acquiring the Terahertz wave image, the inverse image of the Terahertz wave image and the optical image of the target to be scanned according to the digital signal and the digital image signal, and transmitting the images to a display unit for partition synchronous display.
Description
Technical field
The present invention relates to THz wave Image Acquisition and process field, in particular to a kind of transmission-type THz wave real time imagery scanister.
Background technology
Terahertz (Terahertz, THz) ripple is commonly referred to as frequency and is in the electromagnetic wave between 0.1THz～10THz (wavelength is at 3mm～30 μ m), between microwave and infrared between.THz wave has very strong penetration power to materials such as plastics, the scraps of paper, textile and leathers, and these materials can hinder visible light and ultrared propagation fully; The THz ripple has the wavelength shorter than millimeter wave, and this makes the image that is become through the THz ripple have higher spatial resolution; The photon energy of 1THz is merely 4.1meV, compares with X ray, and it can not cause ionization damage to biological tissue.In addition, the not outside radiated electromagnetic wave of passive type terahertz imaging has high concealment performance and security.It is thus clear that passive type terahertz imaging technology might become a kind of novel safety check technology, can form effective complementation with traditional safety check means.
At present; Because the detector of terahertz wave band receives the restriction of processing technology; It is extremely expensive not only to make difficulty but also cost; So terahertz imaging can't reach picture CCD (Charge-coupled Device, charge coupled cell) camera or the flat array that kind of infrared Jiao forms two dimensional image easily.Therefore, most of terahertz imagings adopt the scanning imagery pattern.In scanning imagery, because the mechanical scanning imagery of pointwise need take a long time, this has limited its practicality in safety check; And adopt 2-D vibration mirror to carry out scanning imagery, though can improve sweep velocity, the requirement for the required high resolving power of safety check, big visual field, fast imaging exists bigger difficulty in implementation procedure.
Summary of the invention
The present invention provides a kind of transmission-type THz wave real time imagery scanister, in order to satisfy the requirement of safety check middle high-resolution, big visual field, fast imaging.
The invention provides a kind of transmission-type THz wave real time imagery scanister; This device comprises: polyhedron rotary drum, THz wave lens, terahertz wave detector, prime amplifier, data collecting card, camera, image pick-up card, image-generating unit and display unit; Wherein, The polyhedron rotary drum rotates around its turning axle, and simultaneously along the axis of swing reciprocally swinging, is used for the THz wave of target emanation to be scanned and/or reflection is reflexed to the THz wave lens; Said axis of swing is parallel to horizontal direction, and said turning axle becomes the angle of setting perpendicular to said axis of swing and with vertical direction; Or said rotating shaft parallel is in horizontal direction, and said axis of swing is perpendicular to said turning axle and the angle that becomes to set with vertical direction; The THz wave lens are used for the THz wave that scanning obtains is converged to terahertz wave detector; Terahertz wave detector is used for converting voltage signal into detecting THz wave; Prime amplifier is used for voltage signal is carried out filtering, amplification; Data collecting card is used for that output signal to prime amplifier carries out the A/D conversion and data acquisition obtains digital signal; Camera is used to obtain the optical imagery of target to be scanned; Image pick-up card is used for image is collected data image signal; Image-generating unit is used for obtaining the THz wave image of target to be scanned, the inverse video and the optical imagery of THz wave image according to digital signal and data image signal, and the inverse video of Terahertz image, Terahertz image and optical imagery are sent to display unit carry out subregion and show simultaneously.
The foregoing description carries out two-dimensional scan through the polyhedron rotary drum in the horizontal and vertical scan objects of treating; And adopt camera to obtain the optical imagery of target to be scanned; And then obtain the THz wave image that resolution is higher, the visual field is bigger, the inverse video and the optical imagery of THz wave image quickly; Satisfy the demand of safety check, reduced cost, overcome the problem that exists in the prior art.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work property, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the front view of first embodiment of the invention;
Fig. 2 is the structure cut-open view of pentahedron rotary drum among Fig. 1 embodiment;
Fig. 3 is the front view of second embodiment of the invention;
Fig. 4 is the front view of third embodiment of the invention.
Embodiment
To combine the accompanying drawing in the embodiment of the invention below, the technical scheme in the embodiment of the invention is carried out clear, intactly description, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not paying the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
Transmission-type THz wave real time imagery scanister is used for the THz wave imaging of target according to an embodiment of the invention, and this device comprises sweep test and image acquisition section.Sweep test comprises: window, be positioned at target to be scanned after, to get into transmission-type THz wave real time imagery scanister inner in order to block parasitic light, dust etc.; The polyhedron rotary drum is located on the light path behind the window, in order to horizontal and vertical two-dimensional scan target to be scanned; The THz wave lens are on the light path behind the polyhedron rotary drum of position, to converge the target institute's radiation to be measured that the scanning of polyhedron rotary drum obtains and/or the THz wave of reflection; Terahertz wave detector is positioned on the light path behind the THz wave lens, receives that the THz wave lens converge and the target institute's radiation to be scanned that comes and/or the terahertz signal of reflection.Image acquisition section comprises: prime amplifier, be connected with the output port of terahertz detector, and carry out processing such as filtering, amplification in order to the signal that terahertz detector is exported; Data collecting card is installed in computer-internal, in order under the control of computing machine, the output signal from prime amplifier carried out operations such as A/D conversion, data acquisition; Camera (like the CCD camera) is positioned at by the polyhedron rotary drum, is used to obtain the optical imagery of target to be scanned; Image pick-up card is installed in computer-internal, and the picture signal that is used under the control of computing machine, camera being obtained is gathered, and obtains data image signal; Image-generating unit; Be used for obtaining the Terahertz image of target to be scanned, the inverse video and the optical imagery of Terahertz image, and on display, be divided into three zones and show three width of cloth realtime graphics simultaneously: the inverse video of the optical imagery of imaging region, Terahertz image and Terahertz image according to digital signal and data image signal.
In an embodiment of the present invention, the direction of the turning axle of polyhedron rotary drum is parallel to horizontal direction, and its axis of swing becomes the angle (as 45 °) of setting perpendicular to turning axle and with vertical direction; Also can axis of swing be parallel to horizontal direction, turning axle becomes the angle (for example 45 °) of setting perpendicular to axis of swing and with vertical direction.
Fig. 1 is the front view of first embodiment of the invention; THz wave light path with glancing incidence is the example explanation; The polyhedron rotary drum is a pentahedron rotary drum in the present embodiment; The axis of swing of this pentahedron rotary drum 3 is parallel to horizontal direction, and turning axle becomes the angle of setting perpendicular to axis of swing and with vertical direction, and target 1 to be scanned places the place ahead of this pentahedron rotary drum 3.
Biconvex THz wave lens 4 are located on the light path behind the pentahedron rotary drum 3; Be positioned at the below of the scanning plane of pentahedron rotary drum 3; And the center of biconvex THz wave lens 4 overlaps with the center of the scanning plane of described pentahedron rotary drum 3, can arrive on the biconvex THz wave lens 4 from the THz wave that the scanning plane (rotating to the face at target to be scanned rear) of pentahedron rotary drum 3 is reflected guaranteeing.Biconvex THz wave lens 4 are used for the THz wave from target to be scanned that the scanning of polyhedron rotary drum obtains is converged to terahertz wave detector 5.
During scanning, pentahedron rotary drum 3 rotates around its turning axle, and its turning axle can be reflected on the biconvex THz wave lens 4 with the THz wave of assurance from target emanation to be measured from the horizontal by laterally arranging.Each face of pentahedron rotary drum 3 forwards the rear of target 1 to be scanned to, and the horizontal direction that all can treat scan objects 1 is carried out the quick scanning of one dimension, and pentahedron rotary drum 3 revolutions moved for 1 week, can realize treating the fine scanning of scan objects 1, and the line number of scanning is 5 row.
Pentahedron rotary drum 3 also carries out reciprocally swinging around its axis of swing when its turning axle rotates, promptly changes the angle at pentahedron rotary drum 3 and angle that vertical plane becomes, and the position on the object point vertical direction is changed, thereby realizes scanning longitudinally.Let pentahedron rotary drum 3 rotation and swing the speed that synchronous continuous motion can improve scanning, can make whole motion steady, realize two dimensional surface scanning.The CCD camera is arranged near pentahedron rotary drum (not shown in Fig. 1), is used to obtain the optical imagery of target 1 to be scanned.
The terahertz signal that scans converts voltage signal to through terahertz wave detector 5; Processing such as the filtering of this signal through prime amplifier, amplification are passed to the data collecting card that is contained in computer-internal, then under the control of computing machine; Synchronizing signal trigger data acquisition card through sweep test; Signal to from prime amplifier is gathered, and splices reconstruct through image-generating unit then and shows that the two-dimensional scan of accomplishing complete target to be scanned 1 forms images.Image pick-up card is installed in computer-internal, and the optical image signal that is used under the control of computing machine, camera being obtained is gathered, and obtains data image signal; Image-generating unit is used for obtaining the Terahertz image of target to be scanned, the inverse video and the optical imagery of Terahertz image according to digital signal and data image signal.Be divided into three zones on the display and show three width of cloth realtime graphics simultaneously: the Terahertz image of imaging region, the inverse video of Terahertz image and optical imagery.
The polyhedron rotary drum can be hollow honeycomb shape structure in the foregoing description, and its material can be aluminium alloy.
Fig. 2 is the structure cut-open view of pentahedron rotary drum among Fig. 1 embodiment.As shown in Figure 2,1 is the turning axle of pentahedron rotary drum, and 2 is the axis of swing of pentahedron rotary drum, and 3 is the pentahedron rotary drum, and 4 is the shell of pentahedron rotary drum.
Present embodiment can also be applied to real time scan imaging infrared and millimeter wave band except the real time scan imaging that can be applied to terahertz wave band.
For example, embodiments of the invention can be applied to mm-wave imaging.When mm-wave imaging, just can carry out the real time scan imaging to target to be measured through THz wave lens and terahertz wave detector being changed into the millimeter wave lens and the millimeter wave detector that work in millimeter wave band.
Again for example, embodiments of the invention also can be applied to infrared thermal imaging.When infrared thermal imaging, just can carry out the REAL TIME INFRARED THERMAL IMAGE thermal imaging to target to be measured through changing the Infrared Lens and the infrared eye that work in infrared band into through THz wave lens and terahertz wave detector.
Embodiments of the invention can be applied to the imaging and passive imaging pattern, also can be applied to the Active Imaging pattern.When the imaging and passive imaging pattern, the transmission-type THz wave real time imagery scanister of the embodiment of the invention directly receives the THz wave of target to be scanned self radiation, carries out the real time scan imaging.
When the Active Imaging pattern, need be by external source to target 1 emission THz wave to be scanned, imaging device receives the THz wave of target 1 reflection to be scanned.In the first embodiment of the present invention, this external light source can be arranged at a side of polyhedron rotary drum 3, and the illumination of target 1 to be scanned is provided with the light source of broad.Perhaps; The THz wave transceiver that THz wave can launched and receive to utilization replaces terahertz wave detector 5; Because light path is reversible, the THz wave that the THz wave transceiver sends arrives target 1 to be scanned via sweep test, and the exterior lighting of target 1 to be scanned is provided.Thus, embodiments of the invention can work in initiatively or the imaging and passive imaging pattern, and range of application is more widely arranged.
First instance is the transversal scanning that realizes treating scan objects through the high speed rotating of polyhedron rotary drum, realizes treating the scan objects longitudinal scanning through the reciprocally swinging of polyhedron rotary drum simultaneously, realizes treating the scan objects two-dimensional real-time imaging with this.It is sphere and another side is aspheric biconvex lens that the THz wave lens adopt the one side that is made by teflon.This instance is a longitudinal scanning of realizing treating scan objects through the high speed rotating of polyhedron rotary drum, realizes treating the transversal scanning of scan objects simultaneously through the reciprocally swinging of polyhedron rotary drum, realizes treating the scan objects two-dimensional real-time imaging with this.To adopt the polymkeric substance (TPX) of 4-methylpentene to be made into the one side that forms be aspheric biconvex lens for the sphere another side to the THz wave lens in this instance.In addition, the polymkeric substance of employed 4-methylpentene (TPX) material is transparent to visible light in the present embodiment, therefore can greatly reduce difficulty in imaging device making and the debug process.
Fig. 3 is the front view of second embodiment of the invention.Light path with the THz wave of glancing incidence is that example describes below.The polyhedron rotary drum is a pentahedron rotary drum in the present embodiment, and the direction of the turning axle of this pentahedron rotary drum 3 is parallel to horizontal direction, and its axis of swing becomes the angle of setting perpendicular to turning axle and with vertical direction, and target 1 to be scanned is positioned at the place ahead of this pentahedron rotary drum.
During scanning, pentahedron rotary drum 3 rotates around its turning axle, and its turning axle can be reflected on the THz wave lens 4 with the THz wave of assurance from target emanation to be measured from the horizontal by laterally arranging.Each face of pentahedron rotary drum 3 forwards the rear of target 1 to be scanned to, and the vertical direction that all can treat scan objects 1 carries out the quick scanning of one dimension, and pentahedron rotary drum 3 revolutions moved for 1 week, can realize treating the multiple row scanning of scan objects 1, and the line number of scanning is 5 row.
Pentahedron rotary drum 3 is when its turning axle rotates; Also carry out reciprocally swinging around its axis of swing; Axis of swing becomes the angle (as 45 °) of setting perpendicular to turning axle and with vertical direction; Promptly change the angle at pentahedron rotary drum 3 and angle that vertical plane becomes, the position on the object point horizontal direction is changed, thereby realize horizontal scanning.Let pentahedron rotary drum 3 rotation and swing the speed that synchronous continuous motion can improve scanning, can make whole motion steady, realize two dimensional surface scanning to object space.The CCD camera is arranged near pentahedron rotary drum (not shown in Fig. 3), is used to obtain the image of target 1 to be scanned.
The terahertz signal that scans converts voltage signal to through terahertz wave detector 5; Processing such as the filtering of this signal through prime amplifier, amplification are passed to the data collecting card that is contained in computer-internal, then under the control of computing machine; Synchronizing signal trigger data acquisition card through sweep test; Signal to from prime amplifier is gathered, and splices reconstruct through computing machine then and shows that the two-dimensional scan of accomplishing complete target to be scanned 1 forms images.Image pick-up card is installed in computer-internal, and the picture signal that is used under the control of computing machine, camera being obtained is gathered, and obtains data image signal.Image-generating unit is used for obtaining the Terahertz image of target to be scanned, the inverse video and the optical imagery of Terahertz image according to digital signal and data image signal.Be divided into three zones on the display and show three width of cloth realtime graphics simultaneously: imaging region Terahertz image, the inverse video of Terahertz image and optical imagery.
Present embodiment can also be applied to the real time scan imaging of millimeter wave and infrared band except the real time imagery that can be applied to terahertz wave band.
For example, embodiments of the invention can be applied to mm-wave imaging.When mm-wave imaging, just can carry out real time imagery to target to be measured through changing THz wave lens and terahertz wave detector into work in millimeter wave band millimeter wave lens and millimeter wave detector.
Again for example, embodiments of the invention also can be applied to infrared thermal imaging.When infrared thermal imaging, just can carry out the REAL TIME INFRARED THERMAL IMAGE thermal imaging to target to be measured through changing the Infrared Lens and the infrared eye that work in infrared band into through THz wave lens and terahertz wave detector.
The present invention can be applied to the imaging and passive imaging pattern, can also be applied to the Active Imaging pattern.When the imaging and passive imaging pattern, the transmission-type THz wave real time imagery scanister of the embodiment of the invention directly receives the THz wave of target to be scanned self radiation, carries out real time imagery.
When the Active Imaging pattern, need be by external source to target emission THz wave to be scanned, imaging device receives the THz wave of target reflection to be scanned.In the second embodiment of the present invention, this external light source can be arranged at the side of polyhedron rotary drum 3, and the illumination of target to be scanned is provided with the light source of broad.Perhaps; The THz wave transceiver that THz wave can launched and receive to utilization replaces terahertz wave detector; Because light path is reversible, the THz wave that the THz wave transceiver sends arrives target to be scanned via terahertz wave fast imaging scanner, and the exterior lighting of target to be scanned is provided.Thus, embodiments of the invention can work in initiatively or the imaging and passive imaging pattern, and range of application is more widely arranged.
Among first embodiment is the transversal scanning that realizes treating scan objects through the high speed rotating of polyhedron rotary drum; Realize treating the scan objects longitudinal scanning through the reciprocally swinging of polyhedron rotary drum simultaneously, realize treating the scan objects two-dimensional real-time imaging with this.The THz wave lens adopt teflon to be made into and form, for one side is that sphere simultaneously is aspheric biconvex lens.Among second embodiment is that high speed rotating through the polyhedron rotary drum realizes the longitudinal scanning to object space, realizes treating the scan objects transversal scanning through the reciprocally swinging of polyhedron rotary drum simultaneously, realizes treating the scan objects two-dimensional real-time imaging with this.And the THz wave lens adopt the polymkeric substance (TPX) of 4-methylpentene to be made, for one side is that sphere simultaneously is aspheric biconvex lens.The Terahertz Fresnel Lenses that THz wave lens in the present embodiment adopt polymkeric substance (TPX) material by the 4-methylpentene to form.In addition, the polymkeric substance of employed 4-methylpentene (TPX) material is transparent to visible light in the present embodiment, therefore can reduce the difficulty in imaging device making and the debug process greatly.
Fig. 4 is the front view of third embodiment of the invention, is the example explanation with the light path of the THz wave of glancing incidence.The polyhedron rotary drum is a pentahedron rotary drum in the present embodiment, and the rotating shaft parallel of this pentahedron rotary drum 3 is in horizontal direction, and its axis of swing becomes the angle of setting perpendicular to turning axle and with vertical direction, and target 1 to be scanned is positioned at the place ahead of this pentahedron rotary drum 3.
The Terahertz Fresnel Lenses 4 that is formed by polymkeric substance (TPX) material of 4-methylpentene is located on the light path behind the pentahedron rotary drum 3; Terahertz Fresnel Lenses 4 is positioned at the below of the scanning plane of pentahedron rotary drum 3; And the center of Terahertz Fresnel Lenses 4 overlaps with the center of the scanning plane of described pentahedron rotary drum 3, can arrive on the Terahertz Fresnel Lenses 4 with the THz wave that scanning plane was reflected of assurance from pentahedron rotary drum 3.Terahertz Fresnel Lenses 4 is used for the THz wave that scanning obtains is converged to terahertz wave detector 5.
During scanning, pentahedron rotary drum 3 rotates around its turning axle, and its turning axle can be reflected on the Terahertz Fresnel Lenses 4 with the THz wave of assurance from target emanation to be measured from the horizontal by laterally arranging.Each face of pentahedron rotary drum 3 forwards the rear of target 1 to be scanned to, and the vertical direction that all can treat scan objects 1 carries out the quick scanning of one dimension, and pentahedron rotary drum 3 revolutions moved for 1 week, can realize treating the multiple row scanning of scan objects, and the line number of scanning is 5 row.
Pentahedron rotary drum 3 also carries out reciprocally swinging around its reciprocally swinging axle when its turning axle rotates, promptly changes the angle at pentahedron rotary drum 3 and angle that vertical plane becomes, and the position on the object point horizontal direction is changed, thereby realize horizontal scanning.Let the pentahedron rotary drum rotation and swing the speed that synchronous continuous motion can improve scanning, can make whole motion steady, realize two dimensional surface scanning to object space.The CCD camera is arranged near pentahedron rotary drum (not shown in Fig. 4), is used to obtain the image of target 1 to be scanned.
The terahertz signal that scans converts voltage signal to through terahertz wave detector 5; Processing such as the filtering of this voltage signal through prime amplifier, amplification are passed to the data collecting card that is contained in computer-internal, then under the control of computing machine; Synchronizing signal trigger data acquisition card through scanner; Signal to from prime amplifier is gathered, and splices reconstruct through image-generating unit then and shows that the two-dimensional scan of accomplishing complete target to be scanned forms images.Image pick-up card is installed in computer-internal, and the picture signal that is used under the control of computing machine, camera being obtained is gathered, and obtains data image signal; Image-generating unit is used for obtaining the Terahertz image of target to be scanned, the inverse video and the optical imagery of Terahertz image according to digital signal and data image signal.Be divided into three zones on the display and show three width of cloth realtime graphics simultaneously: the Terahertz image of imaging region, the inverse video of Terahertz image, optical imagery.
Present embodiment can also be applied to the real time scan imaging of millimeter wave and infrared band except the real time scan imaging that can be applied to terahertz wave band.
For example, embodiments of the invention can be applied to mm-wave imaging.When mm-wave imaging,, just can carry out real time imagery to target to be measured or space through changing Terahertz diaphotoscope and terahertz wave detector into work in millimeter wave band millimeter wave diaphotoscope and millimeter wave detector.
Again for example, embodiments of the invention also can be applied to infrared thermal imaging.When infrared thermal imaging,, just can carry out the REAL TIME INFRARED THERMAL IMAGE thermal imaging to target to be measured through changing infrared transmission mirror and the infrared eye that works in infrared band into through Terahertz diaphotoscope and terahertz wave detector.
Embodiments of the invention can be applied to the imaging and passive imaging pattern, can also be applied to the Active Imaging pattern.When the imaging and passive imaging pattern, transmission-type THz wave real time imagery scanister of the present invention directly receives the THz wave of target to be scanned self radiation, carries out the real time scan imaging.
When the Active Imaging pattern, need be by external source to target 1 emission THz wave to be scanned, imaging device receives the THz wave of target 1 reflection to be scanned.In the third embodiment of the present invention, this external light source can be arranged at the side of polyhedron rotary drum 3, and the illumination of target 1 to be scanned is provided with the light source of broad.Perhaps; The THz wave transceiver that THz wave can launched and receive to utilization replaces terahertz wave detector 5; Because light path is reversible, the THz wave that the THz wave transceiver sends arrives target 1 to be scanned via imaging device, and the exterior lighting of target 1 to be scanned is provided.Thus, the present invention can work in initiatively or the imaging and passive imaging pattern, and range of application is more widely arranged.
One of ordinary skill in the art will appreciate that: accompanying drawing is the synoptic diagram of an embodiment, and module in the accompanying drawing or flow process might not be that embodiment of the present invention is necessary.
One of ordinary skill in the art will appreciate that: the module in the device among the embodiment can be described according to embodiment and be distributed in the device of embodiment, also can carry out respective change and be arranged in the one or more devices that are different from present embodiment.The module of the foregoing description can be merged into a module, also can further split into a plurality of submodules.
The invention described above embodiment sequence number is not represented the quality of embodiment just to description.
What should explain at last is: above embodiment is only in order to explaining technical scheme of the present invention, but not to its restriction; Although with reference to previous embodiment the present invention has been carried out detailed explanation, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that previous embodiment is put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these are revised or replacement, do not make the spirit and the scope of the essence disengaging embodiment of the invention technical scheme of relevant art scheme.
Claims (6)
1. transmission-type THz wave real time imagery scanister; It is characterized in that; Comprise: polyhedron rotary drum, THz wave lens, terahertz wave detector, prime amplifier, data collecting card, camera, image pick-up card, image-generating unit and display unit, wherein
Said polyhedron rotary drum rotates around its turning axle, and simultaneously along the axis of swing reciprocally swinging, is used for the THz wave of target emanation to be scanned and/or reflection is reflexed to said THz wave lens;
Said axis of swing is parallel to horizontal direction, and said turning axle becomes the angle of setting perpendicular to said axis of swing and with vertical direction; Or said rotating shaft parallel is in horizontal direction, and said axis of swing is perpendicular to said turning axle and the angle that becomes to set with vertical direction;
Said THz wave lens are used for the THz wave from said target to be scanned that is obtained by said polyhedron rotary drum scanning is converged to said terahertz wave detector;
Said terahertz wave detector is used for converting the said THz wave that detects into voltage signal;
Said prime amplifier is used for said voltage signal is carried out filtering, amplification;
Said data collecting card is used for that output signal to said prime amplifier carries out the A/D conversion and data acquisition obtains digital signal;
Said camera is used to obtain the optical imagery of said target to be scanned;
Said image pick-up card is used for said optical imagery is collected data image signal;
Said image-generating unit; Be used for obtaining the THz wave image of said target to be scanned, the inverse video and the optical imagery of THz wave image, and the inverse video of said THz wave image, said THz wave image and said optical imagery are sent to said display unit carry out subregion and show simultaneously according to said digital signal and said data image signal.
2. transmission-type THz wave real time imagery scanister according to claim 1 is characterized in that, also comprises:
Window, be positioned at said target to be scanned after, be used to block parasitic light and dust and get into said transmission-type THz wave real time imagery scanister.
3. transmission-type THz wave real time imagery scanister according to claim 1 is characterized in that said polyhedron rotary drum is a hollow honeycomb shape structure, and the material of said polyhedron rotary drum is an aluminium alloy.
4. transmission-type THz wave real time imagery scanister according to claim 2 is characterized in that said THz wave lens are aspheric surface simple lens or Fresnel simple lens.
5. transmission-type THz wave real time imagery scanister according to claim 2 is characterized in that the material of said THz wave lens is the polymkeric substance TPX of teflon or 4-methylpentene.
6. transmission-type THz wave real time imagery scanister according to claim 2 is characterized in that, replaces said terahertz wave detector with the THz wave transceiver, is used for emission and receives THz wave.
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| CN2010102999125A CN102004087B (en) | 2010-09-29 | 2010-09-29 | Transmission type Terahertz wave real-time image scanning device |
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| CN109444978B (en) * | 2018-12-29 | 2024-02-02 | 清华大学 | Millimeter wave/terahertz wave imaging device and method for detecting human body or article |
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