本文提出一种新的计算机彩虹全息图,即无透镜夫琅和费型计算机彩虹全息图,介绍了它的基本原理及物体光波的数学描述,并以彩虹全息图的信息量出发,讨论了一般计算机彩虹全息图信息量的冗余度及减少冗余信息量的方法.最后给出了无透镜夫琅和费型计算机彩虹全息图的实验结果.
Multilayer dielectric thin films have polarization effects at non-normal incidence. In this letter, specifications include s- and p-polarization transmittance (Ts,(p) ≥ 95% at 790—808 nm), s- and p-polarization reflectance (Rs,(p) ≥ 95% at 814—860 nm), an
Strong coupling (SC) between two resonant plasmon modes can result in the formation of new hybrid modes exhibiting Rabi splitting with strong energy exchange at the nanoscale. However, normal Rabi splitting is often limited to
It is found that application of Retinex color constancy algorithm in machine vision can weaken light interference on printing chromatic aberration. We propose a new method of fusion of Weighted Least Squares and Multi-Scale Retinex in the L*a*b* color spa
本文在Z标度类氢模型下,计算了SiXII的电子碰撞激发速率系数。
中医正骨治疗骨折具有“痛苦轻、愈合快、恢复好”等特点,为骨伤患者治疗首选。然而,正骨手法难教、难学,阻碍了中医正骨的传承和发展。开发的中医正骨仿真训练系统采集的数据因传感器和信道传输等因素不可避免地带有噪声,严重制约了正骨手法的量化、分析和评价。为此,针对中医正骨手法变化繁复的特点,提出了在卡尔曼滤波(KF)中增加速度、加速度向量,设计了0阶、1阶和2阶卡尔曼滤波算法,并通过实验方法确定了超参数的设置原则。将本文方法应用于澳大利亚手语标志数据集和中医正骨仿真训练系统中,能够滤除噪声,并较好地保留了正骨手法
针对现有的红外与可见光图像融合算法存在融合图像的对比度与清晰度降低和细节纹理信息丢失等问题,提出将鲁棒主成分分析(RPCA)、压缩感知(CS)和非下采样轮廓波变换(NSCT)相结合的融合算法。首先对两幅源图像分别进行预增强处理,应用RPCA分解得到相应的稀疏分量和低秩分量;然后对稀疏矩阵利用结构随机矩阵压缩采样,利用高斯梯度-信息反差对比度(GG-DCI)压缩融合,经正交匹配追踪法(OMP)重构;
在高数值孔径(NA)投影光刻物镜中, 随着数值孔径的增加, 非球面的偏离度越来越大。对这种大偏离度非球面进行亚纳米量级的检测, 一直是光学检测的一大难题。本文首先对一偏离度超过500 μm的偶次高次非球面进行了计算全息图(Computer-Generated Hologram,CGH)设计, 设计出了满足高精度面形检测和刻蚀加工要求的CGH。然后, 针对此设计方案, 定量分析了CGH的成像畸变及畸变对像差分析的影响。分析结果表明, 不同径向位置的成像倍率偏差(畸变)最大达到了2.7∶1, 并且由于畸变的存
Smith–Purcell radiation (SPR) is the electromagnetic wave generated by free electrons passing above a diffraction grating, and it has played an important role in free-electron light sources and particle accelerators. Orbital angular momentum (OAM) is a ne
In this paper we describe the scanning electron microscopy techniques of electron backscatter diffraction, electron channeling contrast imaging, wavelength dispersive X-ray spectroscopy, and cathodoluminescence hyperspectral imaging. We present our recent