计算光学成像系统测算提速方法综述（特邀）

为克服扫描计算成像系统测量和计算速度慢的缺点,综述一些快速计算成像技术,从测量和计算方面论述提高速度的方法。在基于光场调制的计算光学成像法中,介绍轴向扫描、横向扫描、多波长扫描、散射介质、多距离等调制方式。针对快速定量相位成像技术,介绍定量相位成像方法、基于Kramers-Kronig关系的快速定量相位成像方法、基于对角扩展采样的计算成像方法、基于对称照明的单帧计算成像方法。针对自动聚焦技术,介绍自动聚焦技术分类、核心算法、基于Tanimoto系数和多相梯度绝对值的自动聚焦方法、基于特征区域提取和细分搜索的快速自动聚焦方法。     

基于智能手机平台的计算光学显微成像技术研究综述

计算光学显微成像技术将光学编码和计算解码相结合,通过光学操作和图像算法重建来恢复微观物体的多维信息,为显微成像技术突破传统成像能力提供了强大的助力。这项技术的发展得益于现代光学系统、图像传感器以及高性能数据处理设备的优化,同时也被先进的通信技术和设备的发展所赋能。智能手机平台作为高度集成化的电子设备,具有先进的图像传感器和高性能的处理器,可以采集光学系统的图像并运行图像处理算法,为计算光学显微成像技术的实现创造了全新的方式。进一步地,作为可移动通信终端,智能手机平台开放的操作系统和多样的无线网络接入方法,赋予了显微镜灵活智能化操控能力与丰富的显示和处理分析功能,可用于实现各种复杂环境下多样化的生物学检测应用。文中从四个方面综述了基于智能手机平台的计算光学显微成像技术,首先综述了智能手机平台作为光学成像器件的新型显微成像光路设计,接下来介绍了基于智能手机平台先进传感器的计算光学高通量显微成像技术,然后介绍了智能手机平台的数据处理能力和互联能力在计算显微成像中的应用,最后讨论了这项技术现存在的一些问题及解决方向。     

航空光学成像气动光学传输效应计算研究综述（特邀）

随着更高的需求和科技发展推动航空飞行器工作速度的提高,航空光学成像的机动、灵活等特点显现更加突出,但实现高质量、高分辨率成像的技术难度也极具挑战性。飞行器与高速气流之间的复杂作用产生气动光学效应,光波或光束经过复杂流场与光学窗口时受到强干扰,为此吸引了众多科学家开展多学科交叉融合的相关研究工作,取得了大量的研究成果,为试验测试和工程实践提供了有力支撑。文中从气动光学流场与光学窗口两方面的计算研究入手,详细综述了气动光学传输效应的研究进展,归纳总结了相应的计算方法,综合当前技术发展趋势给出航空光学成像气动光学传输效应计算研究的思考和建议。     

衍射光学成像光谱仪

衍射光学元件(简称DOES)具有多种应用.用作透镜,在原理上色差非常大,若不在设计上做出补偿,则会限制其在宽波段上使用.美国光量子中心罗姆实验室的DeniseLyons在1995年4月国际光学工程学会上,提出一种新颖的结构,利用透镜的这种特性设计出用于可见或红外光谱范围的成像光谱仪而不影响其性能.由DOE元件形成像和色散,利用单色光CCD沿光轴方向对所需波段的成像范围进行扫描.每一探测器都位于相     

成像元件,光学机械

1.光学元件 (1)几何光学元件 在液晶微透镜方面,探讨对称圆形图形电板直径的最佳值,进行了从平板微透镜焦点近傍的衍射像的实侧值推算球面象差量的尝试。制作液晶投影照明系统用微透镜阵列时把离子交换用掩模图形形状从圆形变成矩形获得了高效率。 据报道,利用高折射辐射状梯度折射率透镜,设计试制成具有良好性能的接触透镜(隐形眼镜)。     

光纤传感器

本文介绍了光纤技术的一个新的应用领域——光纤传感器的研究现状。分别介绍了各种传感型及传光型光纤传感器的基本原理、目前取得的结果、尚存在的问题以及可能的应用前景。     

An overview of optical data storage technology

Optical techniques for data storage have advanced rapidly during the last decade. Optical data storage presents many unique advantages, notably the high storage density and low access time, not attainable by conventional recording techniques. The special features of optical recording, the proposed materials and techniques, the components for optical storage as well as some representative optical bit-by-bit and holographic recording systems are reviewed. It is noted that in spite of the lack of widespread commercial success of the optical recording at the present, some unique devices have been successfully demonstrated. The knowledge accumulated in the development of optical data storage should be useful for many recent Applications such as video recording. It is expected that when the conventional magnetic memory technology reaches its limit, optical storage technology should be a competitive contender for the next generation data storage.     

An overview of optical device research in China

An overview of research activities in China on the following optical communications devices is presented: quantum-well semiconductor lasers; distributed feedback laser diodes; wideband, tunable, narrow-linewidth, external-cavity laser diodes, semiconductor and doped-fiber amplifiers; laser-diode-pumped solid state and single-crystal fiber lasers; doped fiber ring lasers, optical modulators; switches; bistable devices; experimental wavelength-division-multiplexed (WDM) systems; and time-division photonic switching systems. The most important of these technologies are highlighted with respect to demonstrated achievements in China. The potential uses of these technologies in future telecommunications systems are discussed     

Mobile radio: An overview

Following a brief prologue and historical overview, such technical issues as the repertoire of systems and services, management of the airwaves, the operating environment, service quality, network issues and cell size, channel coding and modulation, speech coding, diversity, multiplex, and multiple access (FDMA, TDMA, CDMA) are discussed. Also addressed are the potential economic and sociological impacts of mobile radio communications in the wake of the redistribution of airwaves at the World Administrative Radio Conference WARC '92. Performance dependence on multipath delay (related to the cell size and terrain configuration), Doppler frequency (related to the carrier frequency, data rate. and the speed of vehicles), and message length (may dictate the choice of multiple access) is briefly discussed     

海面舰船SAR成像全动态模拟研究综述

开展海面舰船合成孔径雷达(Synthetic Aperture Radar,SAR)成像模拟具有重要的军事应用价值。为解决模拟的逼真性问题,从模拟方法、场景构建、动态考虑等方面介绍了海面舰船SAR成像模拟的国内外研究概况,总结了全动态场景构建与实时性解决方法这两大实现全动态模拟的关键技术,指出目前国内外对于海面舰船SAR成像全动态模拟的研究基本处于空白,关键在于全动态场景构建与实时性实现,相关工作基础较好。最后对下一步研究工作进行了展望。     

Microwave biological effects: An overview

Although most investigators accept the fact that "high power density" of microwaves can result in pathophysiological manifestations of a thermal nature, some reports have suggested that "low power density" microwave (MW) energy can affect neural and immunologic function in animals and man. Most of these reports have emanated from the USSR and other Eastern European countries. Since most reported "low-level" effects relate to behavioral and central nervous system changes, studies are needed to determine the nature and mechanism(s) of the nervous system's reactions, if any, to electromagnetic fields and to investigate the degree to which the individual's performance capabilities may be affected. Because of their important integrative and regulatory functions, the neuroendocrine and central nervous system should receive attention as possible sensitive areas. Neurochemical assays and immunologic reactivity could indicate basic mechanisms of interaction. A critical review of studies into the biological effects of MW's indicates that many of the investigations suffer from inadequacies of either technical facilities and energy measurement skills or insufficient control of the biological specimens and the criteria for biological change. There is a great need for systematic and quantitative comparative investigations, using well-controlled experiments. This should be done by using sound biomedical and biophysical approaches at the various organizational levels from the whole animal to the subcellular level on an integrated basis, with full recognition of the multiple associated and interdependent variables. Above all there is a need for scientific competence and integrity. It is important to maintain a proper perspective and assess realistically the biomedical effects of microwave exposure, so that the worker or general public will not be unduly exposed nor will research, development and benficial utilization of this energy be hampered or unecessarily restricted.     

Switched digital capability: An overview

SDC (Switched Digital Capability) allows end-to-end circuit-switched 56 kb/s data over much of the existing Bell System Network. Since SDC is based largely on the stored program-controlled space and time-division switches, 2-wire local loops, and T-carrier facilities that are already deployed in the network, it can be realized with minimum modification to the existing network. SDC is expected to play a major role in the evolution of the present network to the ISDN (Integrated Services Digital Network) of the future.     

Indonesian telecommunications development: An overview

Indonesian Telecommunications Development is a part of the “National Development,” which carried out, through a series of “Five Year Development Plans” (FYDP), its efforts towards raising the standard of living and well-being of the people. In its development perspective, Indonesia has been pursuing the “Trilogy of Development” which reflects the notion of even development, a sufficiently high rate of economic growth and the dynamic as well as healthy national stability.