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红外技术2015年第37卷第3期 目录
【出 处】
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红外技术
【发表日期】
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2015年37期
其他文献
本文研究了用被动锁模铍酸镧激光器的二次谐波同步泵浦LiNbO3、CsH2AsO4和Ba2NaNb5O15晶体时产生的光参量振荡。泵浦脉冲宽度为10 ps。早先用脉宽大于30 ps或3~5 ps的光脉冲泵浦研究了腔式皮秒光参量振荡器的辐射参数。
期刊
Origin and suppression of back conversion in a phase-matched nonlinear frequency down-conversion pro
Back conversion is an intrinsic phenomenon in nonlinear frequency down-conversion processes. However, the physical reason for its occurrence is not well understood. Here, we theoretically reveal that back conversion is the result of a
Matrix formalism for radiating polarization sheets in multilayer structures of arbitrary composition
In optical studies on layered structures, quantitative analysis of radiating interfaces is often challenging due to multiple interferences. We present here a general and analytical method for computing the radiation from two-dimensional polarization sheet
Analysis of glass homogeneity using the attaching interferometric data model neglects body distribution. To improve analysis accuracy, we establish the three-dimensional gradient index (GRIN) model of glass index by analyzing fused silica homogeneity dist
应用脉冲载波电子散斑干涉(pulsedcarried-ESPI)与计算机层析技术(CT),实现了由高压电极放电激励所产生的瞬态传输声场在经过不同孔径模板衍射后波前与压力场的三维重建,给出了数值结果,并对噪声条件下的计算机层析重建进行了讨论。
研究了亚克力导光板的CO2激光精密高速钻孔工艺。具体采用激光脉冲划线的方式在亚克力基材上高速蚀刻出盲孔作为导光点，旨在提高亚克力基材对光线的漫反射，并优化激光单点能量、脉宽、重复频率、离焦量、切割速度、加速度等工艺条件使导光点满足工业用户对盲孔直径、蚀刻深度和孔间距等参数的需求。实验在光学级亚克力基材上高速钻出微孔，并利用光学检测设备对产品的导光效果进行了测试。实验结果表明：采用实际输出功率为100 W的CO2激光器，波长为10.6 μm，重复频率为8 kHz，激光脉宽为10 μs，切割速度为2500 m
A·C mismatches are studied by Raman spectral characterization of PolyA, PolyC, and their equimolar complex in solution of 0.14 mol/L Na , pH7.0. Experimental results show that A·C mismatches occur to be A/B (mainly A) conformers, and unlike Watson-Crick b
核相关滤波(KCF)跟踪算法应用于尺度发生变化的视频跟踪时,因为无法跟上目标的尺度变化,极易受局部特征或者背景信息干扰,导致跟踪失败和目标丢失。提出了一种基于一维相关滤波的多尺度改进。该改进通过最小化损失函数求解相关滤波器用于尺度跟踪,并在跟踪过程中在线学习和更新滤波器。改进后的算法能够实时更新尺度信息,实现多尺度跟踪。多组实验结果和数据表明,改进后的算法在目标尺度发生剧烈变化时,相比KCF算法的
Interest in the nonlinear properties of multi-mode optical waveguides has seen a recent resurgence on account of the large dimensionality afforded by the platform. The large volume of modes in these waveguides provides a new spatial degree of freedom for
期刊
介绍一种基于数学形态谱和二维矢量分类网络的模式识别体系。数学形态谱相对于图像平移和旋转不变。建立了光学二维矢量分类网络,利用光学逻辑操作和最大值网络的循环操作,得到与输入图像最佳匹配的模式。