共查询到18条相似文献,搜索用时 884 毫秒
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微型MOEMS阿达玛变换近红外光谱仪 总被引:5,自引:0,他引:5
提出一种运用微光机电系统(micro-opto-electro-mechanical systems,MOEMS)闪耀光栅,动态产生阿达玛变换模版的微型近红外光谱仪.它具有体积小、价格低、扫描速度快等突出优点.分析了这种新型近红外光谱仪的结构和工作原理,通过对MOEMS闪耀光栅编程,动态生成了 63阶阿达玛模版.实验得... 相似文献
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微光机电系统(MOEMS)微镜在激光显示、光束扫描、自适应光学等领域都有重要应用。现有的MOEMS微镜驱动器一般为静电吸引型,难以克服其吸合效应造成的各种问题,同时,方形的驱动器难以与圆形的镜面形成良好匹配,填充比较低。提出了一种环形静电排斥驱动器的MOEMS微镜,该静电排斥驱动器以环形排列,并围绕在镜面的周围,达到了与圆形镜面的良好匹配。所设计的微镜口径为204μm,并利用PolyMUMPS表面工艺进行加工。模拟仿真及实验测试结果显示,该微镜具有0.62°的最大旋转角,494μs的响应时间和1.191kHz的工作带宽,适用于一般光束扫描等的应用需求。 相似文献
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《中国光学与应用光学文摘》2004,(5)
TH703 2004053968 反射式微光机电系统(MOEMS)的研究现状与展望=Review and prospect on reflection mode micro-opto-electromechanical system[刊,中]/尤政(清华大学精密仪器及机械学系,北京(100084)),王子旸…∥光学技术,—2004, 相似文献
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设计并制作了一种用于波长信道选择系统的新型柔性悬臂梁电磁驱动光开关,该光开关采用微光机电系统技术制作,由带有平面螺旋形线圈的聚酰亚胺悬臂梁、圆柱形永磁体、基座以及双面反射棱镜组成.通过改变线圈中激励电流的方向来控制开关动作.运用有限元的方法,模拟分析了线圈与永磁体之间电磁力的分布以及悬臂梁回复力、电磁力与挠度的关系.对该光开关的驱动性能进行了测试,实验结果表明:加载较小的工作电流(0.15A),悬臂梁便可以产生较大的挠度(0.925mm),满足波长信道选择系统光路偏转的要求.
关键词:
微光机电系统
光开关
柔性悬臂梁
电磁驱动 相似文献
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分析了基于法布里-珀罗腔的微光机电系统可调谐滤波器中,空气腔厚度与峰值波长间的关系。微光机电系统中,空气腔的厚度一般在一个波长附近,因此腔的干涉级数较小,两边反射镜的反射相位对峰值波长的影响比较大。从反射相位出发,推导出了基于这种结构的可调谐滤波器中空气腔厚度和谐振波长之间的线性关系,并通过数值计算进行了验证。分析了影响滤波器调谐灵敏度的因素,构成介质反射镜的薄膜材料的高低折射值以及薄膜堆的层数都能改变线性系数的值。最后估算了一定波长范围内这种线性关系的误差。 相似文献
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在研制基于微型光机电系统技术的光电器件过程中,需要精确测定器件在给定驱动条件下的运动情况。在对制作完成的光开关进行性能测试时,由于微型光机电系统光开关的几何尺寸的限制,如果要准确测定光开关微反射镜的运动位移。将会有一定的困难。提出了一种采用线阵CCD技术的光学测量方法,实现了对光开关悬臂梁在驱动电压作用下的旋转角度的精确测量。通过理论推导得到了悬臂梁扭转角度与可测量物理量的关系.通过求解方程得到了各个物理量的数值选择对于测量结果的影响,并且给定了测量时各个物理量的参考值。通过实验测量,误差小于10%,表明这是一种具有实际意义的测量方案。 相似文献
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A compact, low cost, high speed, non-destructive testing NIR (near infrared) spectrometer optical system based on MOEMS grating device is developed. The MOEMS grating works as the prismatic element and wavelength scanning element in our optical system. The MOEMS grating enables the design of compact grating spectrometers capable of acquiring full spectra using a single detector element. This MOEMS grating is driven by electromagnetic force and integrated with angle sensor which used to monitored deflection angle while the grating working. Comparing with the traditional spectral system, there is a new structure with a single detector and worked at high frequency. With the characteristics of MOEMS grating, the structure of the spectrometer system is proposed. After calculating the parameters of the optical path, ZEMAX optical software is used to simulate the system. According the ZEMAX output file of the 3D model, the prototype is designed by SolidWorks rapidly, fabricated. Designed for a wavelength range between 800 nm and 1500 nm, the spectrometer optical system features a spectral resolution of 16 nm with the volume of 97 mm × 81.7 mm × 81 mm. For the purpose of reduce modulated effect of sinusoidal rotation, spectral intensity of the different wavelength should be compensated by software method in the further. The system satisfies the demand of NIR micro-spectrometer with a single detector. 相似文献
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To balance conflicts for high-resolution, large-field-of-view and real-time imaging, a retina-like imaging method based on time-of flight (TOF) is proposed. Mathematical models of 3D imaging based on MOEMS are developed. Based on this method, we perform simulations of retina-like scanning properties, including compression of redundant information and rotation and scaling invariance. To validate the theory, we develop a prototype and conduct relevant experiments. The preliminary results agree well with the simulations. 相似文献
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混合集成微型光纤光谱仪的实验测定 总被引:1,自引:1,他引:0
文中简述了所研制微型光谱仪的基本原理和基本结构,并对该微型光谱仪进行了实验测试和标定。在实验中采用汞灯作为测试所用的光源,分别使用不同芯径和数值孔径的光纤作为光输入元件,实验结果表明该光谱仪具有很好的线性度,在采用50μm的多模光纤时,光谱分辨率可达13.8nm,在采用9μm的单模光纤时分辨率可以达到5.5nm。 相似文献
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MOEMS(micro optical electronic mechanical system)微镜面阵光谱仪主要利用微镜面阵分时选通实现单个探测器光谱测量,具有无需斩波器实现脉冲信号输出,无需机械模板实现哈达吗调制,象元分辨率高,体积小,成本低等优点.针对MOEMS微镜面阵光谱仪设计中,狭缝尺寸与光通最之间的矛盾,... 相似文献
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In order to enhance the accuracy of three-component seismic acceleration detection, a novel three-component micro-optoelectronic mechanical systems (MOEMS) accelerometer based on photoelastic effect has been designed. The mechanical properties of sensitive unit under three-component acceleration are analyzed theoretically and a Finite Element Analysis (FEM) simulation is performed simultaneously. Meanwhile, a Mach-Zehnder (M-Z) interferometer which is based on photoelastic effect had been designed and a Beam Propagation Method (BPM) simulation has been processed as well, experimental results indicated that the sensor had a high sensitivity, wide frequency response range and a good linearity in the range of seismic band. 相似文献