本文選題：二氧化碲晶體　切入點(diǎn)：壓電換能器　出處：《中北大學(xué)》2016年碩士論文　論文類型：學(xué)位論文

【摘要】：聲光作用的觀點(diǎn)是法國(guó)著名的物理學(xué)家Brillouin于一九二二年首次在世界上提出的,到1969年初次設(shè)計(jì)出共線型聲光可調(diào)諧濾波器,再到2013年12月2日我國(guó)發(fā)射的首個(gè)無人登月的月球探測(cè)衛(wèi)星“嫦娥三號(hào)”中,作為重要載荷之一的紅外成像光譜儀,使用的是優(yōu)質(zhì)的二氧化碲聲光晶體,捕捉了完整有效的近紅外可見光的圖像數(shù)據(jù)與短波紅外光譜的數(shù)據(jù)。特別是近十年來,隨著相關(guān)工藝的進(jìn)步和云計(jì)算的發(fā)展,光譜成像技術(shù)獲得了意想不到的收獲。值得關(guān)注的是,在尖端軍事領(lǐng)域和生物醫(yī)學(xué)研究方面的應(yīng)用越來越廣泛。眾所周知,成像技術(shù)和光譜技術(shù)是光電技術(shù)的兩個(gè)重要分支,各自在發(fā)展要求的側(cè)重點(diǎn)都有所不同,各自對(duì)空間分辨率和光譜分辨率提出了較高的要求。隨著領(lǐng)域研究拓展的不斷深入,得益于成像光譜技術(shù)研究的突破,使得成像技術(shù)和光譜技術(shù)兩個(gè)分支的技術(shù)融合,創(chuàng)造了良好的條件,相關(guān)的研究正趨于向好發(fā)展的快速通道上。本文針對(duì)現(xiàn)有的體積小、衍射效率高等優(yōu)點(diǎn)的聲光可調(diào)諧濾波器,在分析現(xiàn)有的諸多光譜技術(shù)的國(guó)內(nèi)外研究技術(shù)和發(fā)展的文獻(xiàn)、論文等學(xué)術(shù)文獻(xiàn)基礎(chǔ)上,由此總結(jié)得出了光譜成像技術(shù)與聲光可調(diào)諧濾波器在國(guó)內(nèi)外的發(fā)展情況和不足。闡述了聲光可調(diào)諧濾波器的各個(gè)性能,明確了聲光可調(diào)諧濾波器的工作機(jī)制和工作器件。選取了二氧化碲晶體為聲光相互作用介質(zhì),設(shè)計(jì)了利用兩片換能器的聲光可調(diào)諧濾波器,拓寬聲光可調(diào)諧濾波器的光譜范圍,完成了波長(zhǎng)從450nm~990nm的調(diào)諧范圍,聲光可調(diào)諧濾波器的衍射效率理論值在整個(gè)波長(zhǎng)范圍內(nèi)達(dá)到了70%以上。結(jié)合COMSOL Multiphysics仿真軟件,根據(jù)設(shè)計(jì)的換能器的理論值,仿真了厚度為16um的壓電換能器,以及利用電路和壓電設(shè)備進(jìn)行物理場(chǎng)耦合,分析了驅(qū)動(dòng)電源內(nèi)阻對(duì)壓電換能器的影響,為實(shí)際的聲光可調(diào)諧濾波器提供理論支持。
[Abstract]:The theory of acousto-optic action was first proposed by French physicist Brillouin in 1922, and a collinear acousto-optic tunable filter was first designed in 1969. In December 2nd 2013, in the first unmanned lunar exploration satellite Chang'e 3 launched by China, the infrared imaging spectrometer, which is one of the important payloads, uses high-quality tellurium dioxide acoustooptic crystals. Capture complete and effective near-infrared visible light image data and shortwave infrared spectrum data, especially in the past decade, with the development of related technology and cloud computing, Spectral imaging technology has made unexpected gains. It is worth noting that applications in cutting-edge military fields and biomedical research are becoming more and more extensive. As we all know, imaging technology and spectral technology are two important branches of optoelectronic technology. Each of them has different emphases in the development requirements, and they have put forward higher demands on spatial resolution and spectral resolution. With the development of the field of research, the breakthrough in imaging spectrum technology has been benefited. The fusion of the two branches of imaging technology and spectral technology creates good conditions, and the related research is tending to the fast channel of good development. In this paper, we aim at the small size of the existing technology. The acousto-optic tunable filter with high diffraction efficiency is based on the analysis of the domestic and international research and development literature of many existing spectral technologies, the papers and other academic documents. The development of spectral imaging technology and acousto-optic tunable filter at home and abroad are summarized, and the performances of acousto-optic tunable filter are described. The working mechanism and device of acousto-optic tunable filter are clarified. Tellurium oxide crystal is selected as acousto-optic interaction medium, and an acousto-optic tunable filter using two transducers is designed to widen the spectral range of acousto-optic tunable filter. The wavelength tuning range from 450 nm to 990 nm has been completed, and the diffraction efficiency of the acoustooptic tunable filter has reached more than 70% in the whole wavelength range. Combined with the COMSOL Multiphysics simulation software, the theoretical value of the designed transducer is calculated. The piezoelectric transducer with a thickness of 16um is simulated, and the physical field coupling of the circuit and the piezoelectric device is carried out. The influence of the internal resistance of the driving power supply on the piezoelectric transducer is analyzed, which provides theoretical support for the practical acousto-optic tunable filter.
【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】：2016
【分類號(hào)】：TN713

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