【作者】 陈剑科；

【导师】 陆起涌；

【作者基本信息】 复旦大学 ， 电子与通信工程（专业学位）， 2014， 硕士

【摘要】 在光电子信息领域,充分利用光子作为信息载体的特征,通过光与物质的相互作用,高精度和高分辨率地获取丰富的光学和光电子信息,不仅能够深刻认识和揭示物质的微观结构和带电粒子的运动规律,而且其成果在材料、信息、生物医学、环境、太阳能、航空遥感、和国防等广泛领域获得重要的应用。这是以光电信号精密测量和成像技术的研究和应用为基础,需要在很宽的光谱区,研究可分辨率原子和分子的发射或吸收光谱的分析技术,用于各种物质元素的“指纹”特征及其微量／痕量化学组成的精确测定,包括在各种实验条件下,对各种不同物质的动态发光谱特性进行极高分辨率的精确测量和分析。为了实现宽光谱、高分辨率和快速的光谱测量和分析,在本论文工作中,突破传统单光栅和棱镜等色散元件有限色散角和光谱效率的限制,采用二维CCD阵列光电探测技术,设计和制备了不同焦距的光谱仪,将具有不同闪耀角和色散特性的10光栅进行集成组合,在200-1000nm光谱区,获得10重折叠光谱,成像在CCD阵列探测器的焦平面上,从而将光谱的有效探测区长度扩展了10倍,最高达到276mm。在论文工作中,可靠解决了从二维光谱分析原理、光学设计、工艺到软件分析的一系列工艺和工程制备问题。新型光谱仪具有全谱响应均匀和无缝波长连接、结构紧凑、稳简定标、宽光谱区、高分辨率、全谱高速测量和高可靠性等显著优点。经系统定标后,测量结果显示,无需任何机械位移部件,新的光谱分析系统最高可达到0.045nm/pixel的分辨率,能够在0.001一los时间内完成200-1000nm全光谱数据的快速获取和分析,将能够在科学研究和高科技领域获得重要应用,体现了高性能光谱分析技术研究和发展的趋势。更多还原

【Abstract】 In the opto-electronics field, in terms of the rich spectrum information obtained by the advanced spectrometers through the process in which photons interact with the matters in nature, optical properties of many kinds of solid materials, including macro and micro structures, can be extracted and studied, resulting in high resolution spectra to be applied in the fields of material science and engineering, information technology, bio-medical technology, environment, solar energy, remote sensing, defense and so on.Based on the opto-electron measurement and image technology, it will be required to measure and study the emission and absorption spectra of atoms and molecules in broad wavelength region with ultra-high resolution precision. In terms the spectral data obtained and analyzed in various experiment conditions, the composition and atom element in the materials, like the "finger print", can be uniquely traced and identified without any mistake.In order to achieve the spectral measurement and data analysis with high speed and high resolution in the broad spectral region, in this work, by breaking through the limitation in traditional grating and prism spectrometer design and construction, we used the advanced and two-dimensional Si-based CCD (charge-coupled device) detectors to measure the spectral distribution in its focal plane.10 sub-gratings were integrated. Then the entire spectrum in the 200-1000nm wavelength region was 10-folded and imaged on the focal plane of the CCD array detector. By solving those problems of the optical system design, soft and hardware construction, spectral calibration, and so on, the new spectrometer with a compact size was made to realize the high spectral resolution of about 0.045nm/pixel in the working spectral range. The width of the effective spectral images of about 276mm in extension in the dispersion plane was densely folded 10 times by using 10 sub-gratings that are fixed at different incidence angles. Therefore, the full spectra in the 200-1000nm wavelength region can be measured in a speed of 0.001-10s without any mechanical moving element. The advanced spectrometer studied and made in this work will have the advantage to be used for rapid spectral extraction and analysis, presenting a trend of research and development of the high performance spectrometer in the future.更多还原