共查询到20条相似文献,搜索用时 125 毫秒
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Z—扫描技术及其应用 总被引:3,自引:0,他引:3
文章介绍了Z-扫描技术的原理、特点及其应用,分析了单色Z-扫描法测量非线性折射系数和非线性吸收系数,以及双色Z-扫描法研究非简并非线性光学效应. 相似文献
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热辐射谱的多道式采集及高精度双色高温测量 总被引:2,自引:0,他引:2
在综述光学高温测量方法的基础上,提出热辐射谱的多道式采集及高精度双色高温测量原理与测量装置设计。实验结果及误差分析表明,该方法测温精度达到ΔT/T≤10^-3水平。 相似文献
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利用BST非致冷焦平面探测器在2~14μm的光谱响应的特性,可实现双色热成像系统。介绍双色热图的电子学处理及图像融合的部分电路构成及工作原理,电路由信号采焦(0视频信号A/D化)、图像帧存储、主处理计算机及由可编程逻辑器件的控制与处理电路构成。 相似文献
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双色激光场对运动原子的辐射压力 总被引:3,自引:2,他引:1
本文研究了双色行波场对运动原子的辐射压力,通过数值计算,分别得到了在不同光强,不同频率,不同传播方向条件下,原子在双色场中的受激跃迁速率和辐射压力随速度变化的关系。结果表明:双色场对原子的辐射压力和行波场及驻波场相比,有着许多不同特点,这些特点可以在激光冷却中性原子,原子速度选择,原子动量扩散的研究中加以利用。 相似文献
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系统地研究了任意偏振双色相干场高次谐波,结果表明单个圆偏振光不能产生高次谐波,在适当的条件下,某些谐波可以部分或完全消失,而某些谐波可以得到加强,产生更高次谐波高转换效率的条件是双色线偏振场的结合。 相似文献
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一种新型光子晶体双色谐振腔 总被引:2,自引:0,他引:2
提出一种新型的光子晶体双色谐振腔,以光学传输矩阵法为基础给出了设计的关键参量及其优化方法,并分析了其物理原理.根据常用的650nm/780nm,532nm/671nm,1079nm/1320nm和1 064 nm/1 319 nm等双色激光谱线,设计了4个光子晶体双色谐振腔结构.这种一维光子晶体谐振腔只需要一个谐振腔,缺陷层两侧周期数为5层时,该腔体总厚度小于5 μm,可获品质因子为103~104,相对带宽为10-4~10-5的双色谱线,且模式纯净,基于基模谐振. 相似文献
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铀原子双色三步激光光电离光谱 总被引:1,自引:1,他引:0
对铀原子单色及双色多光子共振电离光谱开发了深入的研究,报道了用双色三步光电离技术测量位于34260-35800cm^-1范围内的奇宇称高位能级的位置和J值。 相似文献
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由亚稳态铀原子用双色三光子电离光谱测量铀原子奇宇称高激发… 总被引:2,自引:2,他引:0
对铀原子单色和双色多光子共振电离光谱,进行了深入的研究。把亚稳态3800cm^-1做为起始,用双色三光子共振电离技术,在37900~83654cm^-1范围内获得了60个铀原子奇宇称高激发态能级的能位值和J值。 相似文献
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Along with the development of the optoelectronic interference technology, invisible technology and anti-radiation missile technology, missile guidance with single band or single mode cannot adapt for modern warfare. So the technology of combined guidance is proposed. In the field of combined guidance, MMW/IR combined guidance is more significant. The critical component of the MMW/IR semi-physical simulation will be discussed in this paper, and the selection principle of the substrate and coating materials used for dichroic beam combiner (DBC) is analyzed: MMW/IR beam combiner. By researching the method of the beam combiner of 8-18 GHz MW and 3-5 μm IR, the theory and simulation are discussed in detail in this paper. And the result is given. At the same time, the distortion effect on the MMW signal is analyzed theoretically and the method is presented. Substrate material is selected. The main problems and study factors include: MMW transmission, insertion phase delay, size of substrate material, and coating. At last, the substrate material is determined, and the thickness of the substrate material is optimized. 相似文献
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根据红外光学系统的会聚特性,用光学增益方法分析了红外系统中各元件对应的光强分布,确定了位于焦面附近光学元件是激光破坏的易损部件,并提出了强激光对红外系统元件损伤,造成其探测、制导功能失效的硬破坏机理;由红外滤光片、探测器和信号处理电路与入射激光波长的光谱响应分析,提出了弱激光对红外系统干扰,导致其探测、制导功能在激光辐照一段时间内失效的软破坏机理;开展了激光辐照红外系统的失效验证实验,较好地解释了其失效的机理和效应。 相似文献
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Thirty four distinct composition series arising out of the 32 crystallographic double point groups are employed to re-derive
in a simple and elegant fashion all the 169 distinct colour symmetry groups generated by the 32 double point groups, exploiting
the idea of colour generators. The advantage of the method employed and some possible applications of these colour groups
are discussed. The resulting colour groups are tabulated. 相似文献
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主要介绍了双"单电桥"法测量低电阻的基本原理与双"单电桥"法测量低电阻的几种实用技巧. 相似文献
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Aiming at the problem that traditional infrared scene real-time radiometric rendering method leads to greater calculation error for securing real-time purpose, this article studies the IR rendering comprehensive optimization method, which secures real-time performance as well as calculation accuracy. Firstly, based on the effective average value principle, the spectrum coupling thermal emission and reflected radiations in the spectral radiometric equation are decomposed into physical quantities, and the spectral radiometric equation is improved to become a simpler calculation between “primer” radiance terms and effective average factors. Secondly, the parameter processing method is proposed to cope with the situation when index parameters of effective average factors exceed the maximum dimensionalities of graphics processing unit (GPU) look-up-table (LUT); and pre-calculation method is applied to promote the real-time evaluation efficiency of the physical quantities in the radiometric equation. Finally, concurrent computation of radiometric equation is achieved with GPU IR scene generation software and the precise and real-time rendering of three-dimensional IR scene is realized. 相似文献
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Infrared (IR) image fusion is designed to fuse several IR images into a comprehensive image to boost imaging quality and reduce redundancy information, and image matching is an indispensable step. However, Conventional matching techniques are susceptible to the noise and fuzzy edges in IR images and it is therefore very desirable to have a matching algorithm that is tolerant to them. This paper presents a method for infrared image matching based on the SUSAN corner detection. To solve the problems of the traditional SUSAN algorithm including the fixed threshold of gray value difference and the failed detection of symmetry corners, an adaptive threshold extraction method is raised in this study. Furthermore, an attached double ring mask is used to improve the complex corner detection capability. A constraint condition and a principle of gravity are adopted to filtrate the candidate corners. The proposed method is qualitatively and quantitatively evaluated on IR images in the experiments. In comparison with other methods, better performance has been achieved. 相似文献