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浏览/检索结果: 共10条，第1-10条 帮助

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Analysis of Stray Light and Enhancement of SNR in DMD-Based Spectrometers 期刊论文  OAI收割
SENSORS, 2022, 卷号: 22, 期号: 16, 页码: 11
作者:  Chen, Xiangzi;  Quan, Xiangqian
  |  收藏  |  浏览/下载：23/0  |  提交时间：2022/10/09
Research on Dispersive Detection Technology Based on Digital Micromirror Device by Atomic Fluorescence Spectrometry 期刊论文  OAI收割
Chinese Journal of Analytical Chemistry, 2018, 卷号: 46, 期号: 12, 页码: 1878-1884
作者:  Tao, C.;  Li, C. S.;  Wang, H. X.;  Zhang, Y. R.;  Zhao, C. W.
  |  收藏  |  浏览/下载：18/0  |  提交时间：2019/09/17
Freeform lens collimating spectrum-folded Hadamard transform near-infrared spectrometer 期刊论文  OAI收割
Optics Communications, 2016, 卷号: 380, 页码: 161-167
作者:  Wang XD(王晓朵);  Liu H(刘华);  Juschkin, Larissa;  Li YP(李云鹏);  Xu JL(许家林)
收藏  |  浏览/下载：65/0  |  提交时间：2016/07/22
Size-resolved source apportionment of aerosol particles with a confocal micro x-ray fluorescence spectrometer 期刊论文  iSwitch采集
Applied spectroscopy, 2011, 卷号: 65, 期号: 12, 页码: 1398-1402
作者:  Sun, Tianxi;  Liu, Zhiguo;  Li, Yude;  Ma, Yongzhong;  Wang, Guangfu
收藏  |  浏览/下载：55/0  |  提交时间：2019/04/23
Study on spectrograph for ionosphere: A broadband imaging instrument prototype for far-ultraviolet (EI CONFERENCE) 会议论文  OAI收割
International Symposium on Photoelectronic Detection and Imaging 2011: Space Exploration Technologies and Applications, May 24, 2011 - May 26, 2011, Beijing, China
作者:  Wang S.-R.;  Lin G.-Y.;  Yu L.
收藏  |  浏览/下载：43/0  |  提交时间：2013/03/25
Current research on space-based exploration for the ionosphere needs more advanced technologies. Because the spectral signals in the ionosphere distributing basically in the far-ultraviolet waveband are very weak. Usual spectrometer structures and detectors such as CCD can't receive enough information. Based on this principle of atmospheric sounding  the imaging spectrometer prototype for ionosphere detection application was designed to solve the problem. This prototype consists of the telescope and the imaging spectrometer. The simple structure and small number of mirrors can help higher transmission efficiency be achieved and weak signals detection be implemented. The telescope is an off-axis parabolic mirror and the spectrometer is a modified Czerny-Turner spectral imaging system. Modified Czerny-Turner spectrometer contains a spherical mirror  a fixed plane grating and a toroidal mirror. By adjusting the incident angle to the collimating mirror and using toroidal mirror  coma and astigmatism were corrected well. We also optimize distances between the grating to the focusing mirror and the focusing mirror to the image plane to improve disadvantages of traditional Czerny-Turner structure. Designed results demonstrate that aberrations are substantially corrected  and high image quality can be obtained in broad waveband. The photon counting Wedge-Strip-Anode detector with micro-channel planes as the receiving plane is accepted for the instrument prototype. The other photon counting 2-D detector responding well for weak light such as Cross-Delay line detector and MAMA detector can also be used for detection. The calibration and performances testing system is made of a vacuum system  a deuterium lamp  a monochrometer and the instrument prototype. Results obtained from the experiment show that the spectral resolution is 2.4 nm and the spatial resolution is 80 m. The other calibration experiments are running. The technology of the spectrometer prototype is important for the research and applications of ionosphere remote sensing. 2011 SPIE.  
Simulation and experiment of the static FTIR based on micro multi-step mirrors (EI CONFERENCE) 会议论文  OAI收割
International Symposium on Photoelectronic Detection and Imaging 2011: Sensor and Micromachined Optical Device Technologies, May 24, 2011 - May 26, 2011, Beijing, China
作者:  Liang Z.-Z.;  Zhang J.;  Zhang J.;  Zhang J.;  Zhu W.-B.
收藏  |  浏览/下载：38/0  |  提交时间：2013/03/25
In recent years  Fourier transform spectrometer (FTS) with small size and low mass is required in many applications with growing need for real-time and small platform spectral detection. In this paper  a micro Fourier transform infrared spectrometer (FTIR) based on spatial modulation mode was designed. This spectrometer has the advantages of high stability and simplified configuration. It also promises optical path differences (OPD) with high precision  as MOEMS technology is used in manufacturing the key components. The simulation and the experiments with regard to this FTIR configuration have been done. Firstly  the diffraction effect of the micro multi-step mirrors (MMSMs) is studied. We discuss the influence to the reversed spectrum by different mirror widths and different diffraction distances. Secondly  we simulate and analyze the influence of the source solid angle to the spectral resolution. Thirdly  we set up the theoretical model of the collimation error which is mainly from the defocus of the optical system and analyze the result caused by the collimation error. Fourthly  a new discrete Fourier transform arithmetic using least-squares cosines progression (LSCP) is proposed which can reconstruct the spectrum with nonuniform sampled signals. Finally  the MMSMs are fabricated used the MOEMS technology and the structural parameters are tested. 2011 Copyright Society of Photo-Optical Instrumentation Engineers (SPIE).  
Design and demonstration of micro multi-step mirrors and light source in micro FTIR (EI CONFERENCE) 会议论文  OAI收割
6th IEEE International Conference on Nano/Micro Engineered and Molecular Systems, NEMS 2011, February 20, 2011 - February 23, 2011, Kaohsiung, Taiwan
Liang Z.; Fu J.; Feng C.; Liang J.
收藏  |  浏览/下载：53/0  |  提交时间：2013/03/25
To obtain high resolution  high signal-to-noise ratio (SNR)  high reliability and real time in wide spectral range  we study the space modulation Micro Fourier Transform Spectrometer (FTS) based on multi-step mirrors covering the spectral range of 3-5m and 8-12 m in theory and experiment. The influences of spectrum reconstruction caused by the diffraction and extended light source in Fourier Transform Infrared Spectrometer (FTIR) are analyzed. A method to reduce the noises in spectrum reconstruction and the relationship between coherent intensity and solid angle of light source are discussed. An extended light source with suitable size is chosen  considering the requirement of SNR and spectrum resolving power in the optical design. Furthermore  the fabrication of micro multi-step mirrors  which is the core part of FTS  is investigated. Three methods for fabricating multi-step micro mirrors are demonstrated. 2011 IEEE.  
Research on the Near-Infrared Spectrometer System 期刊论文  OAI收割
SPECTROSCOPY AND SPECTRAL ANALYSIS, 2009, 卷号: 29, 期号: 8, 页码: 2286-2290
作者:  Xiang Xian-yi;  Wen Zhi-yu;  Long Zai-chuan;  Hong Ming-jian;  Liang Yu-qian
收藏  |  浏览/下载：34/0  |  提交时间：2015/09/21
Micro assembled fourier transform spectrometer (EI CONFERENCE) 会议论文  OAI收割
4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, November 19, 2008 - November 21, 2008, Chengdu, China
作者:  Liang J.-Q.;  Zhang J.;  Zhang J.;  Zhang J.;  Wang B.
收藏  |  浏览/下载：37/0  |  提交时间：2013/03/25
With the trend of minimization of Fourier transform spectrometer (FTS) which is particularly pronounced in many applications  a model of a micro FTS with no moving parts is proposed and analyzed. During analyzng  the gradients which mainly introduce phase error are accounted. Based on these assumptions and the improved Mertz phase correcting method  the spectrum of signal is simulated with real extended light source. The resolution can be up to 3.43nm@800nm  with high signal-to-noise ratio (SNR) limiting resolving ability 6.8dB. In addition  the fabrication method of components are illuminated and demonstrated  which can not only make it bear some advantages over conventional micro dispersive spectrometers  but also afford some new concepts on the design of spectrometers with improved performance. 2009 SPIE.  
拉曼光谱探测相关技术研究 学位论文  OAI收割
作者:  戴艳
  |  收藏  |  浏览/下载：42/0  |  提交时间：2018/12/26