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本文介绍了在生物医学中有广泛应用前景的共焦扫描光学显微镜、扫描近场光学显微术和光学相干微术三种新型成像技术的基本原理和应用。 相似文献
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为解决激光三维成像地形匹配雷达中以往采用的进口光学扫描器体积过大无法满足弹上应用的问题,论述了一种基于美国TI公司TMS320F2812数字控制处理器的小型光学扫描控制系统的设计和实现,该系统采用直流力矩电机直接驱动光学镜片的方式,其结构设计避免了使用减速器带来的误差,同时体积大幅减小;运用优化的PID控制策略实现高速高精度光学扫描控制系统。详细介绍了光学扫描控制系统的硬件结构及闭环软件控制算法,实验结果表明,扫描系统的精度满足使用要求,环境适应性好,适用于各种扫描成像类的光电产品。 相似文献
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新型大尺寸电磁驱动MEMS光学扫描镜的研制 总被引:1,自引:0,他引:1
设计并制作了一种结构新颖的镜面尺寸为6mm×4mm的电磁驱动MEMS光学扫描镜.这种背面为微型铜驱动线圈的MEMS硅基扭转镜面沉浸在由包含永磁体的磁回路产生的磁场中,当电流信号通过驱动线圈时,MEMS光学扫描镜绕着扭转梁发生了大角度的扫描运动.采用MEMS体硅加工工艺和电镀技术制作的器件显示出了优良的性能,实验获得的扫描镜静态转角斜率为0.03°/mA,当器件进行动态扫描时,在381Hz的谐振频率下获得了最大±10.2°的光学扭转角度,空气中的Q因子为221,相应的功耗为13μW,与此同时MEMS光学扫描镜具备了出色的镜面粗糙度、光学反射率和镜面平整度.实验证明该器件完全适合于微型光谱仪和可调光滤波器的应用. 相似文献
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设计并制作了一种结构新颖的镜面尺寸为6mm×4mm的电磁驱动MEMS光学扫描镜.这种背面为微型铜驱动线圈的MEMS硅基扭转镜面沉浸在由包含永磁体的磁回路产生的磁场中,当电流信号通过驱动线圈时,MEMS光学扫描镜绕着扭转梁发生了大角度的扫描运动.采用MEMS体硅加工工艺和电镀技术制作的器件显示出了优良的性能,实验获得的扫描镜静态转角斜率为0.03°/mA,当器件进行动态扫描时,在381Hz的谐振频率下获得了最大±10.2°的光学扭转角度,空气中的Q因子为221,相应的功耗为13μW,与此同时MEMS光学扫描镜具备了出色的镜面粗糙度、光学反射率和镜面平整度.实验证明该器件完全适合于微型光谱仪和可调光滤波器的应用. 相似文献
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介绍了光学相控阵技术的发展背景和工作原理,研究了国内外基于不同电光材料(钽酸锂、PLZT、AlGaAs和液晶)光学相控阵技术的进展,探讨了光束扫描(指向)控制存在的扫描机械问题及光学相控阵具有的功能优势,针对光学相控阵器件的现状,提出了光学相控阵材料技术的研究方向及光学相控阵技术的应用前景。 相似文献
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基于GaAs/AlGaAs光波导扫描技术的研究 总被引:1,自引:1,他引:1
分析了光学相控阵的工作原理,提出了可编程的馈电方案,给出了10层P-I-N型GaAs/AlGaAs相控阵列的实验结果,通过实验证实光学相控阵是一种新颖的、高分辨率的、快速宽角度的扫描技术。 相似文献
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扫描近场光学显微镜是八十年代以来迅速发展起来的一种光学扫描探针显微技术,本文对SNOM的发展历史,基本原理,技术方法,理论问题及应用前景进行了系统的介绍。 相似文献
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Ma Tiehan Jiao Peinan 《Antennas and Propagation Magazine, IEEE》1996,38(6):64-67
The studies and research which have been carried out for ionospheric sounding at the CRIRP (China Research Institute of Radiowave Propagation) are briefly described. Also described are major results, including the setup and programs of the observation network. Finally, the future, developing plans of the CRIRP are described 相似文献
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The discovery of diffraction by Francesco Maria Grimaldi is described. He described the experiments that led to its discovery in the book De Lumine, first published in 1665, two years after Grimaldi's death. Grimaldi's life and his experimental observations are described. Newton's disregard of Grimaldi's work and substitution of the word inflexion for diffraction are discussed 相似文献
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Improved forms of implementation for threshold-logic functions are described. These are based on a recently described cellular array, but require significantly fewer cells than previously described arrays. They could provide the basis of an economical way of producing threshold-logic elements. 相似文献
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Two SiO_2/Si interface structures,which are described by the double bonded model(DBM) and the bridge oxygen model(BOM),have been theoretically studied via first-principle calculations.First-principle simulations demonstrate that the width of the transition region for the interface structure described by DBM is larger than that for the interface structure described by BOM.Such a difference will result in a difference in the gate leakage current. Tunneling current calculation demonstrates that the SiO_2/Si... 相似文献
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A method of interfacing field problems described by TLM to lumped parameter circuits is presented. The technique permits the study of the interaction of complex circuits with components described by a full field model. The procedure is illustrated by results obtained for a capacitive circuit where the capacitor is described by a two-dimensional TLM model 相似文献
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The evolution of microwave filters and multiplexers for space application is described. The many advances are described within the context of the design of the overall communication subsystem. Emphasis is placed on the multipaction and passive intermodulation (PIM) considerations in designing high-power multiplexers. The impact of microwave filter technology in the channel characterization of satellite systems is described. The future directions of research and development are briefly discussed 相似文献
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基于激光加5-技术,首先对激光打标的定义进行了阐述,介绍了激光器的种类、控制系统的演变及激光打标的优势,详细说明了激光打标机的工作原理,结合原理对激光打标机的系统组成、激光电源、激光的产生、Q开关的原理、结构及功能等作了说明,根据维修经验对激光光路的调整进行了详细总结,最后对于常见的故障现象及解决方法进行举例说明. 相似文献