CN112304431A - Imaging system and imaging method - Google Patents
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Abstract
The embodiment of the application relates to the technical field of terahertz application, and by adopting the imaging system and the imaging method disclosed by the embodiment of the application, point-by-point moving scanning of an immovable object is realized by matching a mechanical linkage assembly with an optical assembly to transmit a first optical signal emitted by a light source, a second light beam with information of an object to be imaged is reflected on the basis of the optical assembly, position information of the object to be imaged is fed back on the basis of the mechanical linkage assembly, and then the second light beam and the position information of the object are received by a data acquisition and processing module to perform image restoration.
Description
Technical Field
The invention relates to the technical field of terahertz application, in particular to an imaging system and an imaging method.
Background
In 1995, b.b.hu and m.c.nuss scanned and imaged fresh leaves and integrated circuits by using terahertz time-domain spectroscopy, so that intuitive and clear transmission scanning images were obtained, and a new chapter in the field of terahertz application was opened. The terahertz wave is an electromagnetic wave with a wave band between millimeter waves and infrared light, and has the characteristics of strong perspective, high safety and low energy. Compared with the millimeter wave imaging technology, the terahertz imaging technology can obtain a scanning image with higher resolution; compared with the infrared light imaging technology, the terahertz wave in the terahertz imaging technology can penetrate through a lot of materials which cannot be penetrated by infrared light, such as paper, plastics, ceramics and semiconductors, so that scanning imaging of a hidden target object is realized; compared with the X-ray imaging technology commonly used for medical imaging and security inspection imaging, the terahertz imaging technology can make up for the defect that X-rays are easy to cause radiation damage to a human body, and can also solve the problem of low contrast when the X-rays are used for low-density substance imaging. Therefore, the terahertz imaging technology is widely applied to the fields of hidden target detection, security imaging, nondestructive testing, cancerous biological tissue identification and the like.
At present, the development of terahertz imaging technology aims to develop practical terahertz imaging detection equipment, and the terahertz imaging equipment is required to meet the requirements of real-time performance, high resolution, remote detection and portability. The optimized scanning technology, the synthetic aperture technology and the array receiving technology are mainly fused.
In the prior art, the application precondition of the imaging system is that an object to be imaged can move along with the movement of the scanning module, and for an object to be imaged which cannot move, such as a large-sized object, the object to be imaged can not be scanned in different positions and in all directions, and an imaging image with good effect can not be obtained.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide an imaging system and an imaging method, which solve the problem that the imaging system in the prior art cannot scan and image an immovable object.
In view of this, the present application provides an imaging system, including:
a light source for emitting a first light signal;
the optical scanning module comprises an optical component and a mechanical linkage component; the optical component is used for transmitting a first optical signal and a second optical signal, the first optical signal is a scanning optical signal, and the second optical signal is an optical signal of object information; the mechanical linkage assembly is used for arranging the optical assembly, driving the optical assembly to move and feeding back position information of an object;
and the data acquisition and processing module is used for converting the second optical signal into an electric signal and carrying out image restoration based on the electric signal.
Further, the mechanical linkage assembly includes:
a base assembly for mounting an optical assembly;
the translation table component is used for placing the base table component;
and the driving assembly is used for controlling the translation table assembly to move and feeding back the position information of the object.
Further, the base station assembly comprises a first base station arranged along a first direction, a second base station arranged along a second direction and a third base station arranged along a third direction, wherein the first direction, the second direction and the third direction are pairwise vertical;
the translation platform assembly comprises a first translation platform arranged on the first base platform, a second translation platform arranged on the second base platform and a third translation platform arranged on the third base platform;
the driving assembly comprises a first driver, a second driver and a third driver, the first driver is connected with the first base station and controls the first translation platform to translate on the first base station, the second driver is connected with the second base station and controls the second translation platform to translate on the second base station, and the third driver is connected with the third base station and controls the third translation platform to translate on the third base station.
Furthermore, the first base station is provided with a first motor, and the first motor is connected with a first driver; the second base station is provided with a second motor, and the second motor is connected with a second driver; the third base station is provided with a third motor, and the third motor is connected with a third driver.
Furthermore, the driving assembly also comprises a collector;
the collector is connected with the first motor, the second motor and the third motor respectively.
Further, the optical assembly comprises a parabolic mirror, a beam splitter and a plane mirror;
a parabolic mirror for converging the first optical signal and/or the second optical signal and for reflecting the optical signal;
a beam splitter for transmitting the first optical signal and for reflecting the second optical signal;
and the plane mirror is used for reflecting the optical signal.
Further, the paraboloid mirror comprises a first off-axis paraboloid mirror, a second off-axis paraboloid mirror and a third off-axis paraboloid mirror, and the third off-axis paraboloid mirror is arranged on the third translation stage;
the plane mirror comprises a first plane mirror arranged on the first translation platform and a second plane mirror arranged on the second translation platform;
the first off-axis paraboloidal mirror is used for reflecting a first optical signal emitted by the light source;
the first plane mirror is used for reflecting the first optical signal or the second optical signal;
the second plane mirror is used for reflecting the first optical signal or the second optical signal;
a third off-axis parabolic mirror for converging the first optical signal onto the object;
and the second off-axis paraboloidal mirror is used for converging the second optical signal reflected by the beam splitter.
Furthermore, the data acquisition processing module comprises a synchronous control unit, a data acquisition unit and an image restoration unit;
the synchronous control unit is used for synchronously controlling the optical scanning module and the data acquisition unit;
the data acquisition unit is used for acquiring a second optical signal and converting the second optical signal into an electric signal;
and the image restoration unit is used for restoring the image based on the electric signal.
Furthermore, the data acquisition unit comprises a detector and a data acquisition card connected with the detector;
a detector for converting the second optical signal into an electrical signal;
and the data acquisition card is used for acquiring the summarized electric signals.
Correspondingly, the embodiment of the application also discloses an imaging method, which comprises the following steps:
the method comprises the steps that a first optical signal emitted by a light source is converged on an object through an optical scanning module to be scanned point by point, and a second optical signal is transmitted;
and converting the second optical signal received by the data acquisition processing module into an electric signal, and carrying out image restoration based on the electric signal.
The embodiment of the application has the following beneficial effects:
according to the imaging system and the imaging method, the point-by-point moving scanning of the immovable object is achieved through the mechanical linkage assembly and the optical assembly which are matched to transmit the first optical signal emitted by the light source, the second light beam with the information of the object to be imaged is reflected on the basis of the optical assembly, the position information of the object to be imaged is fed back on the basis of the mechanical linkage assembly, and then the second light beam and the position information of the object are received through the data acquisition and processing module to perform image restoration.
Drawings
In order to more clearly illustrate the technical solutions and advantages of the embodiments of the present application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic structural diagram of an imaging system provided in an embodiment of the present application;
FIG. 2 is a schematic diagram of an alternative embodiment of the mechanical linkage assembly of FIG. 1;
FIG. 3 is a schematic block diagram of an alternative embodiment of the optical assembly of FIG. 1;
FIG. 4 is a schematic diagram illustrating an alternative embodiment in conjunction with a mechanical linkage assembly 22 and an optical assembly 21;
FIG. 5 is a schematic diagram of the data acquisition and processing module of FIG. 1;
fig. 6 is a schematic structural diagram of an alternative embodiment of the data acquisition and processing module in fig. 1.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present application clearer, the embodiments of the present application will be described in further detail with reference to the accompanying drawings. It should be apparent that the described embodiment is only one embodiment of the embodiments of the application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that "embodiment" as referred to herein refers to a particular feature, structure, or characteristic that may be included in at least one implementation of an embodiment of the present application. In the description of the embodiments of the present application, the terms "first", "second", "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to a number of technical features indicated, whereby features defined as "first", "second" and "third" may explicitly or implicitly include one or more such features. Also, the terms "first," "second," and "third" are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order, it being understood that such usage data may be interchanged where appropriate. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover non-exclusive inclusions, such that they contain a list of modules, elements, and steps, not necessarily limited to those modules, elements, and steps explicitly listed, but may include other modules, elements, and steps not explicitly listed or inherent to the systems and methods herein.
Referring to fig. 1, fig. 1 is a schematic structural diagram of an imaging system according to an embodiment of the present disclosure, where the structural diagram includes:
a light source 1 for emitting a first light signal;
the optical scanning module 2 comprises an optical assembly 21 and a mechanical linkage assembly 22; an optical component 21, configured to transmit a first optical signal and a second optical signal, where the first optical signal is a scanning optical signal, and the second optical signal is an optical signal of object information; the mechanical linkage assembly 22 is used for arranging the optical assembly 21, driving the optical assembly 21 to move and feeding back position information of an object;
and the data acquisition and processing module 3 is used for converting the second optical signal into an electrical signal and carrying out image restoration based on the electrical signal.
In the embodiment of the present application, the light source 1 shown in fig. 1 may be a terahertz quantum cascade laser, a terahertz photoconductive antenna, or a free electron laser or a gas laser.
In an alternative embodiment, the light source 1 is a terahertz quantum cascade laser, and the first optical signal is terahertz light.
In the embodiment of the application, the object is an object to be imaged.
By adopting the imaging system provided by the embodiment of the application, the point-by-point moving scanning of the immovable object is realized by transmitting the first optical signal emitted by the light source through the cooperation of the mechanical linkage assembly and the optical assembly, the second light beam with the information of the object to be imaged is reflected on the basis of the optical assembly, the position information of the object to be imaged is fed back on the basis of the mechanical linkage assembly, and then the second light beam and the position information of the object are received through the data acquisition and processing module to perform image restoration.
In the embodiment of the present application, the mechanical linkage assembly 22 shown in fig. 1 includes:
a base assembly 221 for mounting the optical assembly 21;
a translation stage assembly 222 for positioning the base assembly 221;
and a driving assembly 223 for controlling the movement of the translation stage assembly 222 and for feeding back the position information of the object.
In the present embodiment, the base assembly 221 may comprise one or more bases, the translation stage assembly 222 may comprise one or more translation stages, and the drive assembly 223 may comprise one or more drives.
An alternative embodiment is described below based on the above-described base assembly 221, translation stage assembly 222, and drive assembly 223, as shown in fig. 2:
the base assembly 221 includes a first base 2211 arranged along a first direction, a second base 2212 arranged along a second direction, and a third base 2213 arranged along a third direction, wherein the first direction, the second direction, and the third direction are perpendicular to each other;
the translation stage assembly 222 includes a first translation stage 2221 disposed on the first base 2211, a second translation stage 2222 disposed on the second base 2212, and a third translation stage 2223 disposed on the third base 2213;
the drive assembly 223 includes a first drive 2231, a second drive 2232, and a third drive 2233, the first drive 2231 coupled to the first base 2211 and configured to translate the first translation stage 2221 on the first base 2221, the second drive 2232 coupled to the second base 2212 and configured to translate the second translation stage 2222 on the second base 2212, and the third drive 2233 coupled to the third base 2213 and configured to translate the third translation stage 2223 on the third base 2213.
In the embodiment of the present application, the base assembly 221 may further include a motor 224, and based on the above embodiments, the motor may include a first motor 2241, a second motor 2242, and a third motor 2243, where the first motor 2241 is connected to the first driver 2231; the second motor 22442 is connected to a second driver 2232; the third motor 2243 is connected to the third driver 2233.
Further, the driving assembly 223 further includes a collector (not shown) for collecting position information of the object.
In an optional implementation manner, the number of the collectors is one, and the collectors are respectively connected with the first motor 2241, the second motor 2242 and the third motor 2243, and are used for collecting the position information of the object and feeding back the position information to the data collecting and processing module.
Alternatively, the position information may be expressed by longitude, latitude, and altitude, or may be expressed by coordinate axes.
In another optional implementation, the number of the collectors is multiple. For example, the number of the collectors is 3, and the collector includes a first collector, a second collector and a third collector, wherein the first collector is connected to the first motor 2241, the second collector is connected to the second motor 2242, and the third collector is connected to the third motor 2243. The first collector, the second collector and the third collector respectively collect the position information of the object to be imaged in the first direction, the position information of the object to be imaged in the second direction and the position information of the object to be imaged in the third direction, and feed the position information back to the data acquisition and processing module 3.
By adopting the mechanical linkage assembly provided by the embodiment of the application, the motor arranged on the base station assembly is controlled by the driver to drive the translation platform assembly to translate relative to the base station, and meanwhile, the position information of the scanning focus is fed back to the data acquisition and processing module through the acquisition device, so that the one-to-one correspondence between the image information and the position information is ensured.
In the embodiment of the present application, the optical assembly 21 shown in fig. 1 includes:
a parabolic mirror 211 for converging the first optical signal and/or the second optical signal and for reflecting the optical signal;
a beam splitter 212 for transmitting the first optical signal and for reflecting the second optical signal;
and a flat mirror 213 for reflecting the optical signal.
In an alternative embodiment, as shown in fig. 3, parabolic mirror 211 comprises a first off-axis parabolic mirror 2111, a second off-axis parabolic mirror 2112 and a third off-axis parabolic mirror 2113;
the plane mirror 213 includes a first plane mirror 2131 and a second plane mirror 2132;
a first off-axis parabolic mirror 2111 for reflecting a first optical signal emitted by the light source 1;
a first plane mirror 2131 for reflecting the first optical signal or the second optical signal;
a second flat mirror 2132 for reflecting the first optical signal or the second optical signal;
a third off-axis parabolic mirror 2113 for focusing the first optical signal onto the object;
and a second off-axis parabolic mirror 2112 for converging the second optical signal reflected by the beam splitter 212.
By adopting the optical assembly provided by the embodiment of the application, the first optical signal and the second optical signal are effectively transmitted through common optical assemblies such as the first off-axis parabolic mirror, the first plane mirror, the second plane mirror, the beam splitter, the third off-axis parabolic mirror and the second off-axis parabolic mirror.
An alternative embodiment is described below in conjunction with a mechanical linkage assembly 22 and an optical assembly 21, as shown in fig. 4, with a third off-axis parabolic mirror 2113 disposed on a third translation stage 2223, a first planar mirror 2131 disposed on a first translation stage 2221, and a second planar mirror 2132 disposed on a second translation stage 2222. The first direction is an X-axis, the second direction is a Y-axis, and the third direction is a Z-axis.
The first off-axis parabolic mirror 2111 is within the emission coverage of the light source 1, and the first off-axis parabolic mirror 2111 receives the first light signal emitted by the light source 1 and reflects it into a parallel light signal. The parallel optical signal penetrates through the beam splitter 212 to irradiate to the first plane mirror 2131, the first plane mirror 2131 reflects the parallel optical signal penetrating through the beam splitter 212, the transmission direction of the parallel optical signal is changed, the parallel optical signal is irradiated to the second plane mirror 2132, the second plane mirror 2132 reflects the parallel optical signal reflected by the first plane mirror 2131, the transmission direction of the parallel optical signal is changed again, the parallel optical signal is irradiated to the third off-axis parabolic mirror 2113, the third off-axis parabolic mirror 2113 receives the parallel optical signal reflected by the second plane mirror 2132, and converges the parallel optical signals on the object to be imaged, scans the object to be imaged, and reflects the second optical signal with the information of the object to be imaged to the third off-axis parabolic mirror 2113, the reflected second optical signal passes through the second flat mirror 2132, the first flat mirror 2131 and the beam splitter 212 in sequence, and then reflected by the beam splitter 212 to a second off-axis parabolic mirror 2112 for light signal convergence.
The third translation stage 2223 is controlled by the third driver 2233 to translate on the third base 2213, so as to drive the third off-axis parabolic mirror 2113 to move along the Z-axis direction; the first translation stage 2221 is controlled by the first driver 2231 to translate on the first base 2211, so as to drive the first plane mirror 2131 to move along the X-axis direction; the second translation stage 2222 is controlled by the second driver 2232 to translate on the second base 2212, so as to drive the second flat mirror 2132 to move along the Y-axis direction.
The first translation stage 2221 is fixed at a fixed position, the second translation stage 2222 drives the second flat mirror 2132 to translate in the Y-axis direction, the third translation stage 2223 drives the third off-axis parabolic mirror 2113 to translate in the Z-axis direction, and the first optical signal can perform two-dimensional scanning on a section of the object to be imaged. The first translation stage 2221 is fixed at another position, the second translation stage 2222 drives the second flat mirror 231 to translate in the Y-axis direction, the third translation stage 2223 drives the third off-axis parabolic mirror 2113 to translate in the Z-axis direction, and the first optical signal can perform two-dimensional scanning on a section of the object to be imaged. And finally, reconstructing the two-dimensional scanning images at different fixed positions of the first translation stage 2221 to realize three-dimensional imaging of the object. Similarly, the above three-dimensional imaging can be achieved by fixing the second translation stage 2222 or the third translation stage 2223 at different positions.
By adopting the embodiment of the application, the point-by-point moving scanning of the immovable object is realized by matching the mechanical linkage assembly with the optical assembly to transmit the first optical signal emitted by the light source, the second light beam with the information of the object to be imaged is reflected on the basis of the optical assembly, the position information of the object to be imaged is fed back on the basis of the mechanical linkage assembly, and then the second light beam and the position information of the object are received by the data acquisition and processing module to perform image restoration, so that not only can a two-dimensional image of the object be obtained, but also a three-dimensional image of the object can be obtained.
In the embodiment of the present application, the data acquisition and processing module 3 shown in fig. 1 includes the units shown in fig. 5:
a synchronization control unit 31 for synchronously controlling the optical scanning module 2 and the data acquisition unit 32;
the data acquisition unit 32 is used for acquiring a second optical signal and converting the second optical signal into an electrical signal;
and an image restoration unit 33 for restoring an image based on the electric signal.
In the embodiment of the present application, an optional implementation is introduced based on the data acquisition and processing module 3, as shown in fig. 6:
the data acquisition unit 32 comprises a detector 321 and a data acquisition card 322 connected with the detector;
a detector 321 for converting the second optical signal into an electrical signal;
and the data acquisition card 322 is used for acquiring the summarized electric signals.
The synchronization control unit 31 and the image restoration unit 32 are both implemented by a computer programming language. The computer realizes synchronous control and image restoration through labview (graphical visual instrumentation Workbench, graphical programming language development environment) and matrib (Matrix Laboratory). The computer realizes the synchronous control of the driving component 223 (not shown) and the data acquisition card 322 in the optical scanning module 2 through labview programming, that is, the electric signals acquired by the data acquisition card 322 correspond to the position information fed back by the driving component 223 one by one. The computer processes the collected electric signals acquired and collected by the data acquisition card 322 and the position information fed back by the driving component 223 through matlb programming, and restores and displays the object to be imaged.
In this embodiment, the detector 321 may be a terahertz quantum well detector, a Ge: Ga low-temperature detector, a golay box, or a bolometer, and this embodiment is not particularly limited.
By adopting the data acquisition and processing module provided by the embodiment of the application, the optical scanning module and the data acquisition unit are controlled by the synchronous control unit, so that the detector converts the electric signals to be in one-to-one correspondence with the position information received by the data processing unit, and the reduction of an object to be imaged is realized.
An imaging method provided by an embodiment of the present application includes:
the optical scanning module 2 converges a first optical signal emitted by the light source 1 on an object for point-by-point scanning, and converges a second optical signal with object information through a second off-axis parabolic mirror after sequentially passing through a second off-axis parabolic mirror, a second plane, a first plane mirror and a beam splitter, and simultaneously feeds back the position information of the object, wherein the object is an object to be imaged.
And converting the second optical signal received by the data acquisition processing module into an electric signal, and carrying out image restoration based on the electric signal.
Specific embodiments may refer to the imaging system described above.
In the embodiments of the present application, unless explicitly stated or limited otherwise, the term "connected" should be understood broadly, and may be, for example, directly connected or connected through an intermediate medium, or connected inside two modules or in an interaction relationship between the two modules, and may be a wired connection or a wireless connection. The specific meanings of the above terms summarized in the examples of the present application can be understood by those of ordinary skill in the art as specific cases.
It should be noted that: the foregoing descriptions of the embodiments of the present application are provided for illustration only and not for the purpose of limiting the invention as defined by the appended claims. In some cases, the actions or steps recited in the claims can be performed in a different order than in the embodiments and achieve desirable results. In addition, the processes depicted in the accompanying figures do not necessarily require the particular order shown, or sequential order, to achieve desirable results. In some embodiments, multitasking and parallel processing may also be implemented.
All the embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments may be referred to each other, and each embodiment is described with emphasis on differences from other embodiments. In particular, as for the embodiment of the apparatus, since it is substantially similar to the method embodiment, the description is relatively simple, and for the relevant points, reference may be made to the partial description of the method embodiment.
Those skilled in the art will appreciate that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program instructing associated hardware, and the program may be stored in a computer readable medium.
The foregoing is a preferred embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and decorations can be made without departing from the principle of the embodiment of the present application, and these modifications and decorations are also considered to be the protection scope of the embodiment of the present application.
Claims (10)
1. An imaging system, comprising:
a light source for emitting a first light signal;
the optical scanning module comprises an optical component and a mechanical linkage component; the optical component is used for transmitting the first optical signal and transmitting a second optical signal, wherein the first optical signal is a scanning optical signal, and the second optical signal is an optical signal of object information; the mechanical linkage assembly is used for arranging the optical assembly, driving the optical assembly to move and feeding back position information of an object;
and the data acquisition and processing module is used for converting the second optical signal into an electric signal and carrying out image restoration based on the electric signal.
2. An imaging system according to claim 1, wherein the mechanical linkage assembly comprises:
a base assembly for mounting the optical assembly;
a translation stage assembly for positioning the abutment assembly;
and the driving assembly is used for controlling the translation table assembly to move and feeding back the position information of the object.
3. An imaging system according to claim 2,
the base station assembly comprises a first base station arranged along a first direction, a second base station arranged along a second direction and a third base station arranged along a third direction, wherein the first direction, the second direction and the third direction are pairwise vertical;
the translation stage assembly comprises a first translation stage arranged on the first base station, a second translation stage arranged on the second base station and a third translation stage arranged on the third base station;
the driving assembly comprises a first driver, a second driver and a third driver, the first driver is connected with the first base station and controls the first translation platform to translate on the first base station, the second driver is connected with the second base station and controls the second translation platform to translate on the second base station, and the third driver is connected with the third base station and controls the third translation platform to translate on the third base station.
4. An imaging system according to claim 3, wherein said first base station is provided with a first motor, said first motor being connected to said first driver; the second base station is provided with a second motor, and the second motor is connected with the second driver; and the third base station is provided with a third motor, and the third motor is connected with the third driver.
5. An imaging system according to claim 3, wherein said drive assembly further comprises a collector;
the collector is respectively connected with the first motor, the second motor and the third motor.
6. An imaging system according to claim 3, wherein the optical assembly comprises a parabolic mirror, a beam splitter and a plane mirror;
the paraboloid mirror is used for converging the first optical signal and/or the second optical signal and reflecting the optical signal;
the beam splitter is used for transmitting the first optical signal and reflecting the second optical signal;
the plane mirror is used for reflecting the optical signal.
7. An imaging system according to claim 6,
the paraboloid mirror comprises a first off-axis paraboloid mirror, a second off-axis paraboloid mirror and a third off-axis paraboloid mirror, and the third off-axis paraboloid mirror is arranged on the third translation stage;
the plane mirror comprises a first plane mirror arranged on the first translation stage and a second plane mirror arranged on the second translation stage;
the first off-axis paraboloidal mirror is used for reflecting the first optical signal emitted by the light source;
the first plane mirror is used for reflecting the first optical signal or the second optical signal;
the second plane mirror is used for reflecting the first optical signal or the second optical signal;
the third off-axis paraboloidal mirror is used for converging the first optical signal to an object;
the second off-axis paraboloid mirror is used for converging the second optical signal reflected by the beam splitter.
8. The imaging system of claim 1, wherein the data acquisition and processing module comprises a synchronous control unit, a data acquisition unit and an image restoration unit;
the synchronous control unit is used for synchronously controlling the optical scanning module and the data acquisition unit;
the data acquisition unit is used for acquiring the second optical signal and converting the second optical signal into an electric signal;
and the image restoration unit is used for restoring images based on the electric signals.
9. An imaging system according to claim 8, wherein the data acquisition unit comprises a detector and a data acquisition card connected to the detector;
the detector is used for converting the second optical signal into an electrical signal;
and the data acquisition card is used for acquiring and summarizing the electric signals.
10. An imaging method, characterized in that the terahertz imaging method comprises:
the method comprises the steps that a first optical signal emitted by a light source is converged on an object through an optical scanning module to be scanned point by point, and a second optical signal is transmitted;
and converting the second optical signal received by the data acquisition processing module into an electric signal, and carrying out image restoration based on the electric signal.
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Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5004929A (en) * | 1988-06-04 | 1991-04-02 | Fujitsu Limited | Optical system for detecting three-dimensional shape |
| JPH08189817A (en) * | 1993-08-12 | 1996-07-23 | Daipoole:Kk | Three-dimensional image measuring apparatus |
| JP2003287711A (en) * | 2002-03-27 | 2003-10-10 | National Institute Of Advanced Industrial & Technology | Method and apparatus for displaying three-dimensional image |
| JP2004361086A (en) * | 2003-05-30 | 2004-12-24 | Olympus Corp | Biomolecule analyzer |
| JP2005265618A (en) * | 2004-03-18 | 2005-09-29 | Toshiba It & Control Systems Corp | Computerized tomographic apparatus |
| WO2008023196A1 (en) * | 2006-08-23 | 2008-02-28 | Shiv Kumar Sharma | Three-dimensional image recording and display apparatus |
| CN102636435A (en) * | 2012-02-26 | 2012-08-15 | 曾吕明 | Visible photo-acoustic imaging system based on three-dimensional dynamic focusing laser galvanometer scanning |
| CN202869964U (en) * | 2012-10-19 | 2013-04-10 | 深圳先进技术研究院 | Scanning and imaging device of fourier transform spectrometer |
| CN205003079U (en) * | 2015-10-13 | 2016-01-27 | 成都曙光光纤网络有限责任公司 | Terahertz wave passs through imaging system |
| CN105424189A (en) * | 2015-12-04 | 2016-03-23 | 江南大学 | Scanning type multifunctional microscopic-spectral imaging method |
| CN205981445U (en) * | 2016-04-12 | 2017-02-22 | 北京世纪桑尼科技有限公司 | Multiple spot scanning that can be used to spectral analysis is total to focusing imaging system |
| CN106501207A (en) * | 2016-12-28 | 2017-03-15 | 中国科学院上海微系统与信息技术研究所 | Terahertz two-dimensional imaging system and imaging method |
| US20170102231A1 (en) * | 2015-10-13 | 2017-04-13 | Korea Research Institute Of Standards And Science | HIGH-SPEED 3D IMAGING SYSTEM USING CONTINUOUS-WAVE THz BEAM SCAN |
| CN107402197A (en) * | 2017-02-23 | 2017-11-28 | 武汉能斯特科技有限公司 | The scanning detection method and equipment of a kind of delayed luminescence |
| CN109297932A (en) * | 2018-08-29 | 2019-02-01 | 北京遥感设备研究所 | A kind of quasi-optical servo scarnning mirror continuous wave reflection imaging system of Terahertz |
| JP2019117107A (en) * | 2017-12-27 | 2019-07-18 | 日本信号株式会社 | Line scanner |
-
2019
- 2019-07-26 CN CN201910686320.XA patent/CN112304431B/en active Active
Patent Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5004929A (en) * | 1988-06-04 | 1991-04-02 | Fujitsu Limited | Optical system for detecting three-dimensional shape |
| JPH08189817A (en) * | 1993-08-12 | 1996-07-23 | Daipoole:Kk | Three-dimensional image measuring apparatus |
| JP2003287711A (en) * | 2002-03-27 | 2003-10-10 | National Institute Of Advanced Industrial & Technology | Method and apparatus for displaying three-dimensional image |
| JP2004361086A (en) * | 2003-05-30 | 2004-12-24 | Olympus Corp | Biomolecule analyzer |
| JP2005265618A (en) * | 2004-03-18 | 2005-09-29 | Toshiba It & Control Systems Corp | Computerized tomographic apparatus |
| WO2008023196A1 (en) * | 2006-08-23 | 2008-02-28 | Shiv Kumar Sharma | Three-dimensional image recording and display apparatus |
| CN102636435A (en) * | 2012-02-26 | 2012-08-15 | 曾吕明 | Visible photo-acoustic imaging system based on three-dimensional dynamic focusing laser galvanometer scanning |
| CN202869964U (en) * | 2012-10-19 | 2013-04-10 | 深圳先进技术研究院 | Scanning and imaging device of fourier transform spectrometer |
| CN205003079U (en) * | 2015-10-13 | 2016-01-27 | 成都曙光光纤网络有限责任公司 | Terahertz wave passs through imaging system |
| US20170102231A1 (en) * | 2015-10-13 | 2017-04-13 | Korea Research Institute Of Standards And Science | HIGH-SPEED 3D IMAGING SYSTEM USING CONTINUOUS-WAVE THz BEAM SCAN |
| CN105424189A (en) * | 2015-12-04 | 2016-03-23 | 江南大学 | Scanning type multifunctional microscopic-spectral imaging method |
| CN205981445U (en) * | 2016-04-12 | 2017-02-22 | 北京世纪桑尼科技有限公司 | Multiple spot scanning that can be used to spectral analysis is total to focusing imaging system |
| CN106501207A (en) * | 2016-12-28 | 2017-03-15 | 中国科学院上海微系统与信息技术研究所 | Terahertz two-dimensional imaging system and imaging method |
| CN107402197A (en) * | 2017-02-23 | 2017-11-28 | 武汉能斯特科技有限公司 | The scanning detection method and equipment of a kind of delayed luminescence |
| JP2019117107A (en) * | 2017-12-27 | 2019-07-18 | 日本信号株式会社 | Line scanner |
| CN109297932A (en) * | 2018-08-29 | 2019-02-01 | 北京遥感设备研究所 | A kind of quasi-optical servo scarnning mirror continuous wave reflection imaging system of Terahertz |
Non-Patent Citations (3)
| Title |
|---|
| FU CHENG QIU等: "Terahertz optical scanning imaging of motionless polyurethane insulation materials", 《ELECTRONICS LETTERS》, vol. 55, no. 19, pages 1053, XP006082308, DOI: 10.1049/el.2019.2282 * |
| JIN, KH等: "High-speed terahertz reflection three-dimensional imaging for nondestructive evaluation", 《OPTICS EXPRESS》, vol. 20, no. 23, 31 December 2012 (2012-12-31), pages 25432 - 25440 * |
| 刘秀莲等: "移动相机的宽基线图像快速准确三维重建", 《控制工程》, vol. 25, no. 02, 31 December 2018 (2018-12-31), pages 212 - 217 * |
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