论文部分内容阅读
LED应用于列车指示灯
【出 处】
:
激光与光电子学进展
【发表日期】
:
2006年43期
其他文献
本文描述了环面镜-掠入射光栅谱仪系统获得激光等离子体空间分辨XUV光谱的原理,系统结构参数和实验结果,并讨论了这种环面镜技术和交叉狭缝技术各自的优缺点。
Compact freeform off-axis three-mirror imaging system based on the integration of primary and tertia
In this Letter, a novel and compact freeform off-axis three-mirror imaging system and its detailed design method are proposed. The primary mirror and tertiary mirror of the system have the same surface analytical expression and they are integrated on one
本文介绍了利用放电电压和电流的测量结果,对XeGl准分子激光器的耦合功率与等离子体特性阻抗的研究。分析了特性阻抗的函数形式对放电过程的影响以及放电稳定性的分类等,对存在的问题也进行了讨论。
期刊
保偏微纳光纤在光通信、传感检测、非线性光学和量子光学等领域有着广阔的应用前景,在应用中保持其温度稳定性是一个关键问题。通过仿真分析与实验探究了保偏微纳光纤双折射的温度特性。通过偏光干涉法测得干涉谱随着温度增加发生蓝移,精确地获得温度与光纤双折射的变化关系。实验结果证明,温度对保偏微纳光纤的影响远小于对普通保偏光纤的影响,该现象与理论分析的结果相吻合。
We develop a prototype endoscope system that can perform high-dynamic-range structure imaging and hyperspectral imaging. The system is used to successfully acquire the oxyhemoglobin spectrum of blood capillaries and obtain in vivo images
Optimizing beam transport in rapidly compressing beams on the neutralized drift compression experime
The Neutralized Drift Compression Experiment-II (NDCX-II) is an induction linac that generates intense pulses of 1.2 MeV helium ions for heating matter to extreme conditions. Here, we present recent results on optimizing beam transport. The NDCX-II beamli
We report, for the first time to our knowledge, an on-chip mode-locked laser diode (OCMLLD) that employs multimode interference reflectors to eliminate the need of facet mirrors to form the cavity. The result is an OCMLLD that does not require cleaved fac
无透镜数字全息计算成像可以实现大视场高分辨率三维成像,但面临成像分辨率低和信噪比差的问题。为此,构建了基于衍射传输的无透镜压缩数字全息成像模型,开发了基于全变分正则化约束和两步迭代收缩阈值的优化算法,抑制了全息重建的二阶项噪声与孪生像噪声,并在重建模型中引入滤波层,提高了三维图像的重建信噪比。同时,提出了基于有效抗混叠区域的压缩全息分块并行重建算法,提升了压缩数字全息重建效率。建立了基于双角度照明
为了快速准确地对含有噪声及欠采样区域的包裹相位图进行展开,采用理论分析与计算机模拟及实验验证相结合的方法,对基于快速傅里叶变换(FFT)的最小二乘法(FFT-LS)、基于离散余弦变换(DCT)的最小二乘法(DCT-LS)、基于横向剪切干涉的最小二乘法(LS-LS)和预条件共轭梯度法(PCG)的四种相位解包裹算法作了对比研究。结果表明:DCT-LS算法运行速度最快,LS-LS算法次之,PCG算法速度最慢,PCG算法对于噪声的免疫力最强,LS-LS算法处理欠采样的效果最好。