【摘要】：光譜成像儀是把具備了光譜分辨能力的光譜技術(shù)和具備了空間分辨能力的成像技術(shù)集合在一起的一種光學(xué)儀器。在軍事偵察、科學(xué)研究、宇宙探索、環(huán)境監(jiān)測(cè)、航天、精細(xì)農(nóng)業(yè)、安全生產(chǎn)、節(jié)能減排等方面有廣泛的應(yīng)用。 光譜成像儀的核心部件是分光元件。新型的分光元件——聲光可調(diào)諧濾波器（Acousto-Optic Tunable Filter, AOTF)是根據(jù)各向異性聲光晶體介質(zhì)中反常布拉格（Bragg）衍射原理研究制作而成的。與其它的分光元件相比較，AOTF具有：體積小、通光孔徑大、入射孔徑大、分光速度快、衍射效率高、全固無可移動(dòng)部件、光路簡單等優(yōu)點(diǎn)。因此對(duì)AOTF的研究具有重要的意義。 本文首先介紹光譜成像技術(shù)和聲光可調(diào)諧濾波器的國內(nèi)外研究現(xiàn)狀，在此基礎(chǔ)上明確本文的研究內(nèi)容和意義；第二，介紹聲光可調(diào)諧濾波器的工作原理。聲光可調(diào)濾波器的聲光晶體是二氧化碲晶體（TeO2),利用的是反常聲光布拉格衍射的原理研制成的一種新型分光元件。從參量相互作用的基本方程出發(fā)，對(duì)聲光可調(diào)諧濾波器的相關(guān)原理進(jìn)行了詳細(xì)的闡述，說明了非共線型聲光可調(diào)濾波器（AOTF)的結(jié)構(gòu)以及工作原理，，介紹了準(zhǔn)確的切線平行動(dòng)量匹配關(guān)系和聲光可調(diào)諧濾波器（AOTF）的主要性能參數(shù)。第三，介紹壓電超聲換能器的工作原理。壓電超聲換能器是利用壓電晶體的逆壓電效應(yīng)將信號(hào)發(fā)生源發(fā)出的電信號(hào)轉(zhuǎn)換為同頻率的超聲波。通過對(duì)相關(guān)理論的介紹，對(duì)壓電超聲換能器的材料、材料的切型和壓電方程進(jìn)行選擇。并且介紹聲光器件的基本結(jié)構(gòu)和原理。最后，利用多物理場(chǎng)耦合仿真分析軟件（COMSOL Multiphysics）對(duì)壓電超聲換能器鈮酸鋰晶片的振動(dòng)模式和質(zhì)點(diǎn)的振動(dòng)方向進(jìn)行分析，確定質(zhì)點(diǎn)的振動(dòng)方向。同時(shí)對(duì)聲光相互作用介質(zhì)進(jìn)行模擬仿真，研究超聲波進(jìn)入聲光晶體后，聲光晶體的變化，將對(duì)實(shí)際AOTF的研究制作具有重要的指導(dǎo)意義。
[Abstract]:Spectral imager is an optical instrument which combines spectral technology with spectral resolution and imaging technology with spatial resolution. It is widely used in military reconnaissance, scientific research, space exploration, environmental monitoring, aerospace, fine agriculture, safety production, energy saving and emission reduction. The key component of the spectrograph is the spectrometer. A new type of optical splitter, acousto-optic tunable filter (Acousto-Optic Tunable Filter, AOTF), is fabricated on the basis of anomalous Bragg (Bragg) diffraction principle in anisotropic acousto-optic crystal media. Compared with other optical components, AOTF has the following advantages: small volume, large aperture, large incident aperture, high speed of light separation, high diffraction efficiency, no moving parts, simple optical path and so on. Therefore, the study of AOTF is of great significance. This paper first introduces the research status of spectral imaging technology and acousto-optic tunable filter at home and abroad, and then clarifies the research content and significance of this paper. Secondly, the working principle of acousto-optic tunable filter is introduced. The acoustooptic crystal of the acousto-optic tunable filter is tellurium oxide (TeO2). A new type of optical splitter has been developed by using the principle of anomalous acousto-optic Bragg diffraction. Based on the basic equation of parametric interaction, the principle of acousto-optic tunable filter is described in detail, and the structure and working principle of non-collinear acousto-optic tunable filter (AOTF) are explained. The accurate tangent parallel momentum matching relation and the main performance parameters of acoustooptic tunable filter (AOTF) are introduced. Thirdly, the principle of piezoelectric ultrasonic transducer is introduced. Piezoelectric ultrasonic transducer uses the inverse piezoelectric effect of piezoelectric crystal to convert the electric signal from the signal source to the same frequency ultrasonic wave. The materials of piezoelectric ultrasonic transducer, the tangent type of material and the piezoelectric equation are selected by introducing the relevant theories. The basic structure and principle of acoustooptic device are also introduced. Finally, the vibration mode and particle vibration direction of lithium niobate wafer of piezoelectric ultrasonic transducer are analyzed by using multi-physical field coupling simulation software (COMSOL Multiphysics), and the vibration direction of particle is determined. At the same time, the simulation of acousto-optic interaction medium is carried out to study the change of acousto-optic crystal after ultrasonic wave entering into acousto-optic crystal, which will be of great significance to the research and manufacture of practical AOTF.
【學(xué)位授予單位】：中北大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TN713

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 俞寬新,徐介平;泥酸掟單模換能片切割方向的計(jì)算[J];北京工業(yè)大學(xué)學(xué)報(bào);1983年01期

2 俞寬新,史先軍,趙寶森,何士雅;利用相切條件研究TeO_2晶體反常聲光衍射幾何關(guān)系[J];北京工業(yè)大學(xué)學(xué)報(bào);2002年02期

3 何挺,王靜,程燁,林宗堅(jiān);OMIS圖像幾何校正研究[J];地理與地理信息科學(xué);2005年01期

4 余姍;;PbMoO_4聲光器件換能器五層鍍層厚度和帶寬的確定[J];贛南師范學(xué)院學(xué)報(bào);2009年06期

5 班龍;劉維;孫雨南;崔芳;崔建民;;關(guān)于非同向二氧化碲聲光可調(diào)諧濾波器的實(shí)驗(yàn)研究[J];光學(xué)技術(shù);2006年S1期

6 余本國;王建中;;基于非掃描式干涉儀的光譜探測(cè)研究[J];光學(xué)學(xué)報(bào);2010年07期

7 常凌穎;趙葆常;邱躍洪;汶德勝;馬小龍;;聲光可調(diào)諧濾波器成像光譜儀光學(xué)系統(tǒng)設(shè)計(jì)[J];光學(xué)學(xué)報(bào);2010年10期

8 丁蘭英，安西書，任詮，魏愛儉;二氧化碲非同向聲光可調(diào)諧濾波器的設(shè)計(jì)分析[J];光學(xué)學(xué)報(bào);1995年06期

9 董瑛,相里斌,趙葆常;大孔徑靜態(tài)干涉成象光譜儀中的橫向剪切干涉儀[J];光子學(xué)報(bào);1999年11期

10 王麗霞,王慧,高軍;星載超光譜成像技術(shù)應(yīng)用及現(xiàn)狀分析[J];航天返回與遙感;2000年01期

相關(guān)博士學(xué)位論文 前2條

1 李敏毅;鈮酸鋰高頻超聲換能器的研制與輸出功率測(cè)量[D];華南理工大學(xué);2011年

2 張春光;基于超光譜成像系統(tǒng)的聲光可調(diào)濾波技術(shù)研究[D];哈爾濱工業(yè)大學(xué);2008年

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