CN101832912A - Terahertz wave fast imaging scanner - Google Patents
Terahertz wave fast imaging scanner Download PDFInfo
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- CN101832912A CN101832912A CN 201010150731 CN201010150731A CN101832912A CN 101832912 A CN101832912 A CN 101832912A CN 201010150731 CN201010150731 CN 201010150731 CN 201010150731 A CN201010150731 A CN 201010150731A CN 101832912 A CN101832912 A CN 101832912A
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Abstract
The invention relates to an imaging device for performing large field of view and fast scanning on terahertz waves by using a fast scanning device. The terahertz wave fast imaging scanner is used for scanning objects to be scanned, and comprises a frame scanning lens group, a row scanning lens group, a concave mirror and a terahertz wave detector. The frame scanning lens group is positioned behind the objects to be scanned and is used for longitudinally scanning the objects to be scanned; the row scanning lens group is arranged on a light path behind the frame scanning lens group and is used for transversely scanning the objects to be scanned; the concave mirror is positioned on the light path behind the row scanning lens group and is used for converging the terahertz waves; and the terahertz wave detector is positioned on the light path behind the concave mirror and is used for receiving scanning signals. Due to the adoption of the imaging mode of single point light machine scanning, the terahertz wave fast imaging scanner can realize fast imaging of the field of view, and make the whole imaging system have small volume, low cost and relatively easy manufacture and debugging. The terahertz wave fast imaging scanner can be applied to passive imaging modes, and also can be applied to active imaging modes.
Description
Technical field
The present invention relates to the scanister of THz wave imaging, specifically the present invention relates to a kind of imaging device that utilizes quick scanister that THz wave is carried out big visual field, scanned fast.
Background technology
The scan mode of existing several THz wave has: 1, mechanical scanning imaging: it is to utilize mechanical motion to obtain the target property of big ken scene, but mechanical scanning is imaged on need cost certain hour in the process of obtaining signal, is difficult to realize real time imagery.2, synthetic aperture imaging: mainly be to arrange according to certain rules with the miniature antenna in N true aperture, by handling to the received signal to obtain being equivalent to the effect of a synthetic wide aperture antenna, but this imaging system is too complicated and expensive, and the required space of interference array is very big.3, focal plane imaging: be that a plurality of receiving elements are arranged on the focal plane of focusing anteena, utilize the burnt partially different of each feed, thereby produce a plurality of different wave beams that point to and cover the kens, but present stage terahertz wave band receiving element make difficulty, and price is extremely expensive.4, utilize galvanometer to carry out the two-dimensional scan imaging, expect high-resolution image, the very big and needs that galvanometer need be done are high frequency wobbles very, and this implements very difficulty.And galvanometer is difficult in and scans the zone that the people is so big in the such distance of 1-2 rice fast.
During the nearly last ten years, the passive imaging technique of THz wave is because series of advantages that it had and be subjected to people day by day and pay close attention to.The good directionality of THz wave, antijamming capability be strong, can penetrate plasma etc. well; The THz wave imaging is compared with present other photoelectronic imaging technology, and THz wave is subjected to the weather condition effect less, and the THz wave imaging technique can distinguish complex background and metal object.Therefore, passive type THz wave Detection Techniques have more advantage than present photodetection imaging technique under inclement weather, and it has the ability of all weather operations.
The not outside radiated electromagnetic wave of passive imaging has high concealment performance and security.The wave band of THz wave between microwave and infrared between, compare with microwave, wavelength is shorter, resolution is higher, compares with infrared, wavelength is longer, penetrability is better, it has possessed infrared and common advantage microwave, has avoided microwave and some infrared defective again.So THz wave can be widely used in various fields such as military investigation, guidance, anti-stealthy, detection and civilian traffic, safety, medical science, remote sensing.The THz wave imaging technique is the hot topic of scientific circles' research in nearest more than 10 years.
But because the price of terahertz wave detector part is also very expensive at present, and the consistance of its manufacturing and stable also poor, therefore at present the sensitive detection parts of THz wave can't reach and form two dimensional image easily as CCD or infrared focal plane array, and therefore adopting less terahertz wave detector part is the technical application of the most real terahertz wave fast imaging with the form of optics mechanical scanning.
Summary of the invention
The invention provides a kind of terahertz wave fast imaging scanner, to solve the technical matters that exists in the above-mentioned background technology, the price that is the terahertz wave detector part is very expensive, and the consistance of its manufacturing and poor stability, hinders the development of terahertz wave fast imaging technology.
For solving the problems of the technologies described above, the invention provides a kind of terahertz wave fast imaging scanner, be used to scan scanning object, comprise that frame sweeps the mirror group, be positioned at scanning object after, in order to the longitudinal scanning scanning object; Row is swept the mirror group, is located on the light path after frame is swept the mirror group, in order to the transversal scanning scanning object; Concave mirror is positioned on the light path after row is swept the mirror group, to assemble THz wave; Terahertz wave detector is positioned on the light path behind the concave mirror, receives sweep signal.
Wherein, it is a rotatable pitching level crossing that described frame is swept the mirror group, described pitching level crossing and the angled setting of surface level, and the rotating shaft parallel of described pitching level crossing is in surface level.
Wherein, described row is swept the mirror group and is comprised rotatable first pair of commentaries on classics level crossing and second pair of commentaries on classics level crossing, described first pair of commentaries on classics level crossing is positioned at described pitching level crossing below, described first pair of commentaries on classics level crossing and second pair of commentaries on classics level crossing are oppositely arranged, and it is all angled with surface level, make the THz wave that goes out from described first pair of commentaries on classics flat mirror reflects can arrive second pair of commentaries on classics level crossing, and change flat mirror reflects to described concave mirror through described second pair;
The turning axle of described first pair of commentaries on classics level crossing and second pair of commentaries on classics level crossing is positioned at the plane at the normal place of described first pair of commentaries on classics level crossing and second pair of commentaries on classics level crossing, and the turning axle of described first pair of commentaries on classics level crossing and second pair of commentaries on classics level crossing lays respectively at the not homonymy of normal separately, with the angled θ of normal separately
1And θ
2, described first pair of commentaries on classics level crossing and second pair of commentaries on classics level crossing are opposite and rotating speed is identical around the sense of rotation of turning axle separately.
Wherein, described angle θ
1And θ
2Satisfy relational expression L
1* tg2 θ
1=L
2* tg2 θ
2, wherein said first pair of commentaries on classics level crossing is L to the distance of scanning object
1, described second pair of commentaries on classics level crossing is L to the distance of scanning object
2
Wherein, described frame is swept the mirror group and is comprised first level crossing, second level crossing and the 3rd level crossing that sets gradually along optical path direction, described first level crossing and described second level crossing and all angled setting of surface level, described second level crossing is positioned at described first level crossing below, to reflex to described the 3rd level crossing from the light of described first level crossing, described the 3rd level crossing is vertical with surface level to be provided with, the light of described second level crossing is reflexed to described row sweep the mirror group, described first level crossing is rotatable, and its rotating shaft parallel is in surface level.
Wherein, described row is swept the mirror group and is comprised first pair commentaries on classics level crossing and the second pair commentaries on classics level crossing vertical with surface level, described first pair of commentaries on classics level crossing and second pair of commentaries on classics level crossing are oppositely arranged, make the light that goes out from described first pair of commentaries on classics flat mirror reflects can arrive second pair of commentaries on classics level crossing, and changeing flat mirror reflects to described concave mirror through described second pair, described concave mirror is vertical with surface level;
The turning axle of described first pair of commentaries on classics level crossing and second pair of commentaries on classics level crossing is positioned at the plane at described first pair of commentaries on classics level crossing and the second pair of commentaries on classics level crossing and normal place, and the turning axle of described first pair of commentaries on classics level crossing and second pair of commentaries on classics level crossing lays respectively at the not homonymy of normal separately, with normal is angled separately, described first pair of commentaries on classics level crossing and second pair of commentaries on classics level crossing are opposite and rotating speed is identical around the sense of rotation of turning axle separately.
Wherein, described frame is swept the mirror group and is fixed on the rotating base that can rotate, so that described scanning object separated into two parts is scanned respectively.
Wherein, described terahertz wave detector connects computing machine, carries out image reconstruction and demonstration in described computing machine.
Wherein, described scanister also comprises the external light source of launching THz wave, and described external light source is arranged at the top that described frame is swept the mirror group.
Wherein, described terahertz wave detector is for launching and receive the THz wave transmitting-receiving detector of THz wave.
The useful technique effect that the present invention reaches is:
(1) imaging mode of employing single-point optical mechaical scanning not only can be realized the fast imaging to the visual field, but also make that the volume of whole imaging system is little, and cost is low, and it is relatively easy to make debugging.
(2) use a pair of level crossing to carry out transversal scanning, so both reduced the volume of total system, increased the utilization ratio of mirror in rotation process again commentaries on classics.
(3) each element among the present invention all works in reflective-mode, and the optical property of element can not change with the variation of THz wave frequency, makes scanister of the present invention can work in each frequency range like this.
(4) the present invention not only can be applied to the imaging and passive imaging pattern, can also be applied to the Active Imaging pattern, and mode of operation is comparatively flexibly arranged.
(5) whole visual field is divided into two parts scanning, can strengthens the width of scanning field of view like this.
(6) be used for transversal scanning to changeing the level crossing rotation process, be used for the swinging plane mirror continuous motion of longitudinal scanning, form " it " word scan pattern at object space like this, stability and continuity that like this can the safeguards system operation.
(7) big visual field, high resolution scanning in not only can be implemented in closely, and can accomplish very fast sweep velocity.Sweep velocity on the magnitude that can be implemented in second.
Description of drawings
Fig. 1 is the front view of terahertz wave fast imaging scanner first embodiment;
Fig. 2 is the vertical view of terahertz wave fast imaging scanner second embodiment;
Fig. 3 is that the second embodiment frame is swept the A-A of mirror group to cut-open view;
Fig. 4 is a terahertz wave fast imaging scanner scan pattern synoptic diagram.
Description of reference numerals
1-pitching level crossing; 11-first level crossing; 12-second level crossing; 13-the 3rd level crossing; First pair of commentaries on classics level crossing of 2-; Second pair of commentaries on classics level crossing of 3-; The 4-concave mirror; The 5-terahertz wave detector; The 6-scanning object.
Embodiment
For shape of the present invention, structure and characteristics can be understood better, below will enumerate preferred embodiment and also be elaborated in conjunction with the accompanying drawings.
A kind of terahertz wave fast imaging scanner of the present invention is used to scan scanning object, comprises that frame sweeps the mirror group, be positioned at scanning object after, in order to the longitudinal scanning scanning object; Row is swept the mirror group, is located on the light path after frame is swept the mirror group, in order to the transversal scanning scanning object; Concave mirror is positioned on the light path after row is swept the mirror group, to assemble THz wave; Terahertz wave detector is positioned on the light path behind the concave mirror, receives sweep signal.
Fig. 1 is the front view of first embodiment of the invention, light path with the THz wave of glancing incidence is the example explanation, as shown in the figure, to sweep the mirror group be a pitching level crossing 1 to frame in the present embodiment, this pitching level crossing 1 and the angled setting of surface level, scanning object 6 places the place ahead of this pitching level crossing 1.
On the capable light path of sweeping after mirror is mounted on pitching level crossing 1, row is swept the mirror group and is comprised first pair of commentaries on classics level crossing 2 and second pair of commentaries on classics level crossing 3, first pair of commentaries on classics level crossing 2 is positioned at described pitching level crossing 1 below, first pair of commentaries on classics level crossing 2 and second pair of commentaries on classics level crossing 3 are oppositely arranged, and it is all angled with surface level, make the THz wave that reflects from first pair of commentaries on classics level crossing 2 can arrive second pair of commentaries on classics level crossing 3, and reflex on the concave mirror 4 through second pair of commentaries on classics level crossing 3.Concave mirror 4 is used for THz wave is converged to terahertz wave detector 5.
During scanning, first pair of commentaries on classics level crossing 2 and second pair of commentaries on classics level crossing 3 rotate along its turning axle respectively, the turning axle of first pair of commentaries on classics level crossing 2 and second pair of commentaries on classics level crossing 3 is positioned at the plane at first pair of commentaries on classics level crossing 2 and second pair of commentaries on classics level crossing 3 normal place, and the turning axle of first pair of commentaries on classics level crossing 2 and second pair of commentaries on classics level crossing 3 lays respectively at the not homonymy of normal separately, is respectively θ with normal angulation separately
1, θ
2If the first pair of commentaries on classics level crossing 2 is L to the distance of scanning object 6
1, the second pair of commentaries on classics level crossing 3 is L to the distance of scanning object 6
2, θ then
1And θ
2Satisfy relational expression L
1* tg2 θ
1=L
2* tg2 θ
2The one the second commentaries on classics level crossing is opposite and rotating speed is identical around the sense of rotation of turning axle.
Be expert at thus and clear off a principal section direction, THz wave deflects after two Plane of rotation mirror reflections, but because the direction of two plane mirror rotations compensates mutually, final picture point remains unchanged the position in the vertical, and in the horizontal, because the vergence direction of two level crossings is opposite, THz wave produces stack owing to yawing moment is identical, produces skew to the object point position of corresponding image point position.THz wave yawing moment and size change along with the continuous rotation of rotating mirror group, though the positional offset amount of object point also constantly changes thereupon, its track while scan will be a straight line, and the length of straight line depends on the rotating mirror tiltangle
1And θ
2Size and pairing rotating mirror to the distance of scanning object.
When the horizontal field of view scope of needs scanning is big, pitching level crossing 1 can be fixed on the rotating base that can rotate, thereby the sweep limit separated into two parts is scanned respectively.As when being divided into the scanning of left and right sides two parts, promptly pitching level crossing 1 is placed right limit by the rotation rotating base, the motor of control pitching level crossing 1 and first pair of commentaries on classics level crossing 2 of control and second pair of commentaries on classics level crossing 3 reaches coupling, and beginning scans the right half range image of scanning object 6 from the top down.After scanning was finished, rotating base began to anticlockwise, make pitching level crossing 1 arrive the left limit position after, the motor of control pitching level crossing 1 and first pair of commentaries on classics level crossing 2 of control and second pair of commentaries on classics level crossing 3 reaches coupling, beginning scans left half range image from bottom to top.The sequencing of left and right sides half range image scanning is not limit, and determines according to actual needs.
The terahertz signal that scans is sent to the computing machine that links to each other with terahertz wave detector 5 by terahertz wave detector 5, splices reconstruct and demonstration by computing machine, finishes the 6 two-dimensional scan imagings of complete scanning object.
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, terahertz wave fast imaging scanner of the present invention directly receives the THz wave of scanning object 6 self radiation, carries out scanning imagery.
When the Active Imaging pattern, need be by external light source to scanning object 6 emission THz wave, scanister receives the THz wave of scanning object 6 reflections.In the first embodiment of the present invention, this external light source can be arranged at the top of this pitching level crossing 1, and the illumination of scanning object 6 is provided with the light source of broad.Perhaps, terahertz wave detector 5 is selected the THz wave transmitting-receiving detector that can launch and receive THz wave for use, because light path is reversible, the THz wave that THz wave transmitting-receiving detector sends arrives scanning object 6 via terahertz wave fast imaging scanner, and the exterior lighting of scanning object 6 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.
Pitching level crossing 1 among first embodiment, the first pair of commentaries on classics level crossing 2, second pair of commentaries on classics level crossing 3 and concave mirror 4 and all angled setting of surface level.Because present embodiment builds in solid space, therefore fixing and relatively bother when adjusting among first embodiment each element.But the element in the present embodiment is less, and structure is simple relatively.
Fig. 2 is the vertical view of terahertz wave fast imaging scanner second embodiment, and the A-A that Fig. 3 sweeps the mirror group for frame in the present embodiment is to cut-open view, and the light path with the glancing incidence THz wave is the example explanation equally.As shown in the figure, the present invention includes a frame and sweep the mirror group, scanning object 6 places this frame to sweep mirror group the place ahead.This frame is swept the mirror group and is comprised first level crossing 11, second level crossing 12 and the 3rd level crossing 13 that sets gradually along optical path direction in the present embodiment.The one the second level crossings 11 and 12 and all angled setting of surface level, second level crossing 12 is positioned at first level crossing, 11 belows, and the THz wave of first level crossing 11 is reflexed to the 3rd level crossing 13.The 3rd level crossing 13 is vertical with surface level to be provided with, and the THz wave of second level crossing 12 is reflexed to row sweep on the mirror group.
Row is swept mirror and is mounted on the light path after frame is swept the mirror group, and row is swept the mirror group and comprised first pair commentaries on classics level crossing 2 and the second pair commentaries on classics level crossing 3 vertical with surface level.First pair of commentaries on classics level crossing 2 and second pair of commentaries on classics level crossing 3 are oppositely arranged, and make the THz wave that reflects from first pair of commentaries on classics level crossing 2 can arrive second pair of commentaries on classics level crossing 3, and reflex on the concave mirror 4 through second pair of commentaries on classics level crossing 3.Concave mirror 4 is vertical with surface level, is used for THz wave is converged to terahertz wave detector 5.
During scanning, first pair of commentaries on classics level crossing 2 and second pair of commentaries on classics level crossing 3 rotate along its turning axle respectively, the turning axle of first pair of commentaries on classics level crossing 2 and second pair of commentaries on classics level crossing 3 is positioned at the plane at first pair of commentaries on classics level crossing 2 and second pair of commentaries on classics level crossing 3 normal place, promptly in the surface level.And the turning axle of first pair of commentaries on classics level crossing 2 and second pair of commentaries on classics level crossing 3 lays respectively at the not homonymy of normal separately, is respectively θ with normal angulation separately
1And θ
2If the first pair of commentaries on classics level crossing 2 is L to the distance of scanning object 6
1, the second pair of commentaries on classics level crossing 3 is L to the distance of scanning object 6
2, θ then
1And θ
2Satisfy relational expression L
1* tg2 θ
1=L
2* tg2 θ
2First, second is opposite and rotating speed is identical around the sense of rotation of turning axle to changeing level crossing.
Be expert at thus and clear off a principal section direction, THz wave deflects after two Plane of rotation mirror reflections, but because the direction of two plane mirror rotations compensates mutually, final picture point remains unchanged the position in the vertical, and in the horizontal, because the vergence direction of two level crossings is opposite, THz wave produces stack owing to yawing moment is identical, produces to the object point position of corresponding image point position and just moves.THz wave yawing moment and size change along with the continuous rotation of rotating mirror group, though the positional offset amount of object point also constantly changes thereupon, its track while scan will be a straight line, and the length of straight line depends on the tiltangle of rotating mirror
1And θ
2Size and pairing rotating mirror to the distance of scanning object.
When the horizontal field of view scope of needs scanning is big, pitching level crossing 1 can be fixed on the rotating base that can rotate, thereby the sweep limit separated into two parts is scanned respectively.As when being divided into the scanning of left and right sides two parts, promptly pitching level crossing 1 is placed right limit by the rotation rotating base, the motor of control pitching level crossing 1 and first pair of commentaries on classics level crossing 2 of control and second pair of commentaries on classics level crossing 3 reaches coupling, and beginning scans the right half range image of scanning object 6 from the top down.After scanning was finished, rotating base began to anticlockwise, make pitching level crossing 1 arrive the left limit position after, the motor of control pitching level crossing 1 and first pair of commentaries on classics level crossing 2 of control and second pair of commentaries on classics level crossing 3 reaches coupling, beginning scans left half range image from bottom to top.The sequencing of left and right sides half range image scanning is not limit, and determines according to actual needs.
The terahertz wave signal that scans is sent to the computing machine that links to each other with terahertz wave detector 5 by terahertz wave detector 5, by computing machine splice, reconstruct and demonstration, finish the 6 two-dimensional scan imagings of complete scanning object.
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, terahertz wave fast imaging scanner of the present invention directly receives the THz wave of scanning object 6 self radiation, carries out scanning imagery.
When the Active Imaging pattern, need be by external light source to scanning object 6 emission THz wave, scanister receives the THz wave of scanning object 6 reflections.In the second embodiment of the present invention, this external light source can be arranged at the top that this frame is swept the mirror group, and the illumination of scanning object 6 is provided with the light source of broad.Perhaps, this terahertz wave detector 5 selects for use the THz wave transmitting-receiving detector that can launch and receive THz wave to replace, because light path is reversible, the THz wave that THz wave transmitting-receiving detector sends arrives scanning object 6 via terahertz wave fast imaging scanner, and the exterior lighting of scanning object 6 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.
Increased the two sides level crossing among relative first embodiment of second embodiment more, make in a second embodiment except first level crossing 11 and second level crossing 12 with surface level angled, all the other elements are all vertical with surface level to be provided with, therefore most of element can directly be built on surface level, makes the fixing of each element with to adjust relative first embodiment more convenient.
The useful technique effect that the present invention reaches is:
(1) imaging mode of employing single-point optical mechaical scanning not only can be realized the fast imaging to the visual field, but also make that the volume of whole imaging system is little, and cost is low, and it is relatively easy to make debugging.
(2) use a pair of level crossing to carry out transversal scanning, so both reduced the volume of total system, increased the utilization ratio of mirror in rotation process again commentaries on classics.
(3) each element among the present invention all works in reflective-mode, and the optical property of element can not change with the variation of THz wave frequency, makes scanister of the present invention can work in each frequency range like this.
(4) the present invention not only can be applied to the imaging and passive imaging pattern, can also be applied to the Active Imaging pattern, and mode of operation is comparatively flexibly arranged.
(5) whole visual field is divided into two parts scanning, can strengthens the width of scanning field of view like this.
(6) be used for transversal scanning to changeing the level crossing rotation process, be used for the swinging plane mirror continuous motion of longitudinal scanning, form " it " word scan pattern at object space like this, stability and continuity that like this can the safeguards system operation.
(7) big visual field, high resolution scanning in not only can be implemented in closely, and can accomplish very fast sweep velocity.Sweep velocity on the magnitude that can be implemented in second.
The above description of this invention is illustrative, and nonrestrictive, and those skilled in the art is understood, and can carry out many modifications, variation or equivalence to it within spirit that claim limits and scope, but they will fall within the scope of protection of the present invention all.
Claims (10)
1. a terahertz wave fast imaging scanner is used to scan scanning object, it is characterized in that, comprises
Frame is swept the mirror group, be positioned at scanning object after, in order to the longitudinal scanning scanning object;
Row is swept the mirror group, is located on the light path after frame is swept the mirror group, in order to the transversal scanning scanning object;
Concave mirror is positioned on the light path after row is swept the mirror group, to assemble THz wave;
Terahertz wave detector is positioned on the light path behind the concave mirror, receives sweep signal.
2. terahertz wave fast imaging scanner as claimed in claim 1, it is characterized in that, it is a rotatable pitching level crossing that described frame is swept the mirror group, described pitching level crossing and the angled setting of surface level, and the rotating shaft parallel of described pitching level crossing is in surface level.
3. terahertz wave fast imaging scanner as claimed in claim 2, it is characterized in that, described row is swept the mirror group and is comprised rotatable first pair of commentaries on classics level crossing and second pair of commentaries on classics level crossing, described first pair of commentaries on classics level crossing is positioned at described pitching level crossing below, described first pair of commentaries on classics level crossing and second pair of commentaries on classics level crossing are oppositely arranged, and it is all angled with surface level, make the THz wave that goes out from described first pair of commentaries on classics flat mirror reflects can arrive second pair of commentaries on classics level crossing, and change flat mirror reflects to described concave mirror through described second pair;
The turning axle of described first pair of commentaries on classics level crossing and second pair of commentaries on classics level crossing is positioned at the plane at the normal place of described first pair of commentaries on classics level crossing and second pair of commentaries on classics level crossing, and the turning axle of described first pair of commentaries on classics level crossing and second pair of commentaries on classics level crossing lays respectively at the not homonymy of normal separately, with the angled θ of normal separately
1And θ
2, described first pair of commentaries on classics level crossing and second pair of commentaries on classics level crossing are opposite and rotating speed is identical around the sense of rotation of turning axle separately.
4. terahertz wave fast imaging scanner as claimed in claim 3 is characterized in that, described angle θ
1And θ
2Satisfy relational expression L
1* tg2 θ
1=L
2* tg2 θ
2, L wherein
1Be the distance of described first pair of commentaries on classics level crossing to scanning object, L
2Be the distance of described second pair of commentaries on classics level crossing to scanning object.
5. terahertz wave fast imaging scanner as claimed in claim 1, it is characterized in that, described frame is swept the mirror group and is comprised first level crossing that sets gradually along optical path direction, second level crossing and the 3rd level crossing, described first level crossing and described second level crossing and all angled setting of surface level, described second level crossing is positioned at described first level crossing below, to reflex to described the 3rd level crossing from the light of described first level crossing, described the 3rd level crossing is vertical with surface level to be provided with, the light of described second level crossing is reflexed to described row sweep the mirror group, described first level crossing is rotatable, and its rotating shaft parallel is in surface level.
6. terahertz wave fast imaging scanner as claimed in claim 5, it is characterized in that, described row is swept the mirror group and is comprised first pair commentaries on classics level crossing and the second pair commentaries on classics level crossing vertical with surface level, described first pair of commentaries on classics level crossing and second pair of commentaries on classics level crossing are oppositely arranged, make the light that goes out from described first pair of commentaries on classics flat mirror reflects can arrive second pair of commentaries on classics level crossing, and changeing flat mirror reflects to described concave mirror through described second pair, described concave mirror is vertical with surface level;
The turning axle of described first pair of commentaries on classics level crossing and second pair of commentaries on classics level crossing is positioned at the plane at described first pair of commentaries on classics level crossing and the second pair of commentaries on classics level crossing and normal place, and the turning axle of described first pair of commentaries on classics level crossing and second pair of commentaries on classics level crossing lays respectively at the not homonymy of normal separately, with normal is angled separately, described first pair of commentaries on classics level crossing and second pair of commentaries on classics level crossing are opposite and rotating speed is identical around the sense of rotation of turning axle separately.
7. as claim 3 or 6 described terahertz wave fast imaging scanners, it is characterized in that described frame is swept the mirror group and is fixed on the rotating base that can rotate, so that described scanning object separated into two parts is scanned respectively.
8. terahertz wave fast imaging scanner as claimed in claim 7 is characterized in that, described terahertz wave detector connects computing machine, carries out image reconstruction and demonstration in described computing machine.
9. terahertz wave fast imaging scanner as claimed in claim 8 is characterized in that described scanister also comprises the external light source of launching THz wave, and described external light source is arranged at the top that described frame is swept the mirror group.
10. terahertz wave fast imaging scanner as claimed in claim 9 is characterized in that, described terahertz wave detector is for launching and receive the THz wave transmitting-receiving detector of THz wave.
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| CN102004311A (en) * | 2010-09-29 | 2011-04-06 | 首都师范大学 | Tera-hertz wave scanning method and system |
| CN102590095A (en) * | 2012-01-20 | 2012-07-18 | 中国科学院上海技术物理研究所 | Two-dimensional oscillating mirror scanned terahertz passive imaging system |
| CN102681023A (en) * | 2012-04-19 | 2012-09-19 | 首都师范大学 | Terahertz wave imaging system |
| CN102681022A (en) * | 2012-04-19 | 2012-09-19 | 首都师范大学 | Terahertz (THz) wave imaging device |
| CN103575660A (en) * | 2013-11-05 | 2014-02-12 | 湖北久之洋红外系统股份有限公司 | Terahertz-wave scanning imaging system and method for article detection on assembly line |
| CN104914477A (en) * | 2015-07-01 | 2015-09-16 | 博康智能网络科技股份有限公司 | Terahertz human body security check method |
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