【摘 要】
:
从理论上推导了双透镜像散光学系统全息像匹配的普遍公式,并讨论了在全息白光显示术中的一步彩虹、像散一步彩虹和像面全息中的应用.
论文部分内容阅读
从理论上推导了双透镜像散光学系统全息像匹配的普遍公式,并讨论了在全息白光显示术中的一步彩虹、像散一步彩虹和像面全息中的应用.
其他文献
Traditional speckle fringe patterns by electronic speckle pattern interferometry (ESPI) are inherently noisy and of limited visibility, so denoising is the key problem in ESPI. We present the variational denoising method for ESPI. This method transforms t
A single-mode polymer optical fiber (POF) with highly photosensitive core doped with benzil dimethyl ketal (BDK) is fabricated and used for writing Bragg grating through the two-beam interference method. The Bragg wavelength of the grating is about 1570 n
本文提出一种基于氧化石墨烯(Graphene Oxide,GO)微腔的光纤多频法布里-珀罗(Fabry-Perot,FP)声振动传感器。该传感器使用单模光纤端面和GO薄膜构成微米级尺度的FP干涉微腔结构,采用液相法制备GO薄膜并将其作为声振动信号的敏感材料,实现对外界声振动信号的探测。通过控制和优化FP微腔长度可以获得消光比最大的干涉光谱,并对该传感器施加不同频率的单频、双频和三频声振动信号以测试其对多频信号的响应能力。实验结果表明,该传感器具有较高的信噪比(Signal to Noise Ratio,S
针对GaAs基和InP基材料的波长可调谐垂直腔面发射激光器(VCSEL)中微机电系统(MEMS)应力集中引起结构损坏的问题开展研究。设计了蝴蝶结状MEMS悬臂结构, 在保证最大位移不变的情况下, 降低了悬臂固定端所受的米塞斯应力, 提高了器件的可靠性。采用COMSOL软件对蝴蝶结状悬臂结构的各项参数对力学特性的影响进行了优化与分析。结果表明: 优化后的蝴蝶结状MEMS悬臂结构固定端的最大米塞斯应力相比于等截面状悬臂结构最大降低了64%, 对于GaAs基材料的蝴蝶结状MEMS波长可调谐VCSEL自由光谱范围
为确定边缘扩散函数(ESF)最优提取方法,对基于三次样条插值与SG滤波的四种提取方法进行分析比较,包括Spline、Spline SG、MSG及SASG方法。分别通过仿真图像实验与实际遥感图像实验,分析了图像仅存在加性噪声以及图像中同时存在加性噪声与白噪声时,四种方法的有效性。实验结果表明,Spline与Spline SG方法的效果几乎完全一致,仿真实验中,二者线扩散函数(LSF)和调制传递函数(
The current mainstream methods of loop closure detection in visual simultaneous localization and mapping (SLAM) are based on bag-of-words (BoW). However, traditional BoW-based approaches are strongly affected by changes in the appearance of the scene, whi
Tunable diode laser based gas detectors are now being used in a wide variety of applications for safety and environmental interest. A fiber-distributed multi-channel open-path H2S sensor based on tunable diode laser absorption spectroscopy (TDLAS) is deve
A fundamental theoretical investigation of laser ignition is reported. Ignition is happened in an explosion bomb which equipped with visualization windows and all aspects of the phenomenon such as plasmas, shock waves, ignition kernels, and propagating fl
已利用脉沖传输激光器中氘和氟的放热链式反应从二氧化碳中获得激光发射。用系统中的横向放电来触发D2—F2—CO2—He的稳定混合物具有良妤的化学和电效率。在总压力高达250乇时已观客到D2—F2—CO2—He混合物的10.6徵米的激光脉冲,其能量可达0.5焦耳。