本文選題：太赫茲時域光譜成像系統(tǒng) + 掃描成像　； 參考：《西南科技大學(xué)》2017年碩士論文

【摘要】：太赫茲時域光譜成像的研究始于二十世紀九十年代,構(gòu)成了太赫茲波應(yīng)用的主要關(guān)鍵技術(shù),具有巨大的研究和應(yīng)用價值。常用的太赫茲成像方式有連續(xù)波成像、掃描成像、CCD實時成像和近場成像等。本研究課題以太赫茲時域光譜成像系統(tǒng)為主要研究方向,首先從性能參數(shù)上對幾種常見的成像方式進行對比,選出性能相對良好的掃描成像方式進行系統(tǒng)構(gòu)建。然后,根據(jù)太赫茲時域光譜系統(tǒng)的功能需求編寫Lab VIEW軟件程序。最后,利用掃描成像系統(tǒng)進行隱蔽物和含能材料的應(yīng)用研究。具體研究工作包括:(1)構(gòu)建太赫茲時域光譜二維掃描成像系統(tǒng),根據(jù)工作原理和元件性能,并按照光學(xué)平臺的搭建方法,進行光路的設(shè)計和搭建。太赫茲時域光譜成像系統(tǒng)主要由鈦寶石鎖模飛秒激光器、時間延遲平移臺、兩軸平移臺、太赫茲輻射產(chǎn)生裝置、太赫茲探測裝置和鎖相放大器等設(shè)備裝置構(gòu)成。對構(gòu)建完成的系統(tǒng)進行調(diào)試和分析,使其達到較高的性能。(2)根據(jù)太赫茲時域光譜掃描成像系統(tǒng)的功能需求,進行Lab VIEW軟件的模塊化程序編寫,包括參數(shù)設(shè)置、運動控制、波形和圖像顯示、數(shù)據(jù)采集、數(shù)據(jù)保存、數(shù)據(jù)處理和離線數(shù)據(jù)調(diào)用等功能模塊。了解所需虛擬儀器的性能和指令,掌握相關(guān)的理論知識,主要有相干檢測原理、快速傅里葉變換原理、時域光譜數(shù)據(jù)處理理論和相位修正算法。從時域和頻域兩大方面對數(shù)據(jù)進行處理,并分別得到這兩方面的波形和圖像的顯示。(3)利用太赫茲時域光譜掃描成像系統(tǒng)對隱蔽物進行成像,分析系統(tǒng)成像的結(jié)果,從噪聲處理、分辨率增強、邊緣檢測等方面,利用Matlab軟件對成像結(jié)果進行圖像處理,進而分析系統(tǒng)的分辨率。然后再對含能材料進行成像研究,得到含能材料在時域和頻域上的數(shù)據(jù)、波形和圖像,從而對四種含能材料進行分辨。
[Abstract]:The study of terahertz time-domain spectral imaging began in the 1990s. It constitutes the main key technology of terahertz wave application and has great research and application value. The conventional terahertz imaging methods include continuous wave imaging, scanning imaging, CCD real-time imaging and near-field imaging. In this paper, THz time-domain spectral imaging system is taken as the main research direction. Firstly, several common imaging methods are compared in terms of performance parameters, and the scanning imaging method with relatively good performance is selected to construct the system. Then, according to the functional requirements of terahertz time domain spectrum system, the Lab VIEW software program is written. Finally, a scanning imaging system is used to study the applications of concealed and energetic materials. The specific research work includes the construction of THz time-domain spectrum two-dimensional scanning imaging system. The optical path is designed and constructed according to the working principle and the performance of the components, and according to the method of building the optical platform. Terahertz time-domain spectral imaging system is mainly composed of Ti gem mode-locked femtosecond laser, time-delay translation table, two-axis translation table, terahertz radiation generator, terahertz detector and phase-locked amplifier. According to the functional requirements of THz time-domain spectral scanning imaging system, the modularization program of Lab VIEW software is compiled, including parameter setting, motion control, and so on. Waveform and image display, data acquisition, data saving, data processing and offline data transfer and other functional modules. To understand the performance and instruction of the virtual instrument and to master the relevant theoretical knowledge, there are coherence detection principle, fast Fourier transform principle, time-domain spectral data processing theory and phase correction algorithm. The data are processed from the time domain and the frequency domain, and the display of the waveforms and images in these two aspects are obtained respectively. The terahertz time-domain spectral scanning imaging system is used to image the hidden objects. The results of the system imaging are analyzed, and the noise processing is obtained. In the aspect of resolution enhancement and edge detection, the imaging results are processed by Matlab software, and then the resolution of the system is analyzed. Then the imaging of the energetic materials is carried out, and the data, waveforms and images of the energetic materials in the time domain and the frequency domain are obtained, and the four kinds of energetic materials are resolved.
【學(xué)位授予單位】：西南科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TP391.41;O441

【相似文獻】

相關(guān)期刊論文 前10條

1 曹丙花;侯迪波;顏志剛;黃平捷;張光新;周澤魁;;基于太赫茲時域光譜技術(shù)的農(nóng)藥殘留檢測方法[J];紅外與毫米波學(xué)報;2008年06期

2 尚麗平;鄧琥;劉娟;夏祖學(xué);廖小春;;基于光導(dǎo)開關(guān)脈沖偏置電壓的太赫茲時域光譜系統(tǒng)[J];光電工程;2011年03期

3 馬明旺;朱智勇;談效華;向偉;金大志;;離子徑跡電光學(xué)性質(zhì)的太赫茲時域光譜[J];信息與電子工程;2011年03期

4 張興寧,陳稷,周澤魁;太赫茲時域光譜技術(shù)[J];激光與光電子學(xué)進展;2005年07期

5 曹丙花;張光新;周澤魁;;太赫茲時域光譜技術(shù)在紡織纖維鑒別中的應(yīng)用[J];電子科技大學(xué)學(xué)報;2010年01期

6 劉文權(quán);魯遠甫;馮廣智;龔小競;楊s，

本文編號：1820578