【摘 要】
：
Controlling photographic illumination in a structured fashion is a common practice in computational photography and image-based rendering. Here we introduce an incoherent photographic imaging approach
【机 构】
：
BiomedicalEngineering,UniversityofConnecticut,Storrs,Connecticut06269,USAElectricalandComputerEngine
【出 处】
：
Photonics Research
论文部分内容阅读
Controlling photographic illumination in a structured fashion is a common practice in computational photography and image-based rendering. Here we introduce an incoherent photographic imaging approach, termed Fourier ptychographic photography, that use
其他文献
针对菱形晶格多孔光纤，应用全矢量有限差分光束传播法分析了纤芯附近一对特殊气孔、本底气孔以及对角线上的气孔间距对偏振拍长波长敏感性的影响，初步得出包层结构的优化参数，再通过横向伸缩形变引入两种新的非对称结构，进一步抑制多孔光纤原有双折射随波长的非线性变化，在降低偏振拍长波长敏感性的同时包层结构的几何参数也获得了较大的误差容限，结果表明，偏振拍长的中值为132.5 mm，在波长1.2～1.7 μm范围内，相对变化率小于±4%，同时优化后包层结构的几何参数误差容限大于0.1 μm，为制作多孔光纤宽带消色差波片提
维也纳技术物理有限公司的激光交易所从事适合各种实际应用的旧激光器、以激光器为主体的系统、器件和配件的介绍和买卖业务。该所的作用很简单，主要是沟通供求双方的信息，为买主决策，以求达到使各方都满意的结果。买卖双方都可从该所得到好处，尤其是中小型企业和研究所，能以便宜的价格和短的交货期，购得尚能发挥作用的旧激光系统。另外，各类激光器都有零售部件，更换一下，旧的又象新的一样。
Total loss test of the high-reflective (HR) film coated on super-smooth silica substrate by dual ion beam sputtering (DIBS) is based on the well-established cavity ring-down technique. Scattering and transmittance are tested by integral scattering and tra
Hybrid perovskite materials are widely researched due to their high absorptivity, inexpensive synthesis, and promise in photovoltaic devices. These materials are also of interest as highly sensitive photodetectors. In this study, their potential for use i
We investigate the diffraction of the guided modes of a dielectric slab waveguide on a simple integrated structure consisting of a single dielectric ridge on the surface of the waveguide. Numerical simulations based on aperiodic rigorous coupled-wave anal
Aerogel materials manufactured from metal oxides have been used as components in numerous high-energy density physics targets. These aerogels have been identified to be used as a future target material in the AWE fielded campaigns at the US National Ignit
A new method is proposed for the object surveillance system based on the enhanced fish-eye lens and the high speed digital signal processor (DSP). The improved fish-eye lens images an ellipse picture on the charge-coupled device (CCD) surface, which incre
We present an experimental demonstration of notch filters with arbitrary center wavelengths capable of tunable analog output power values varying between full extinction of 15 and 0 dB. Each filter is composed of highly modular apodized four-port Bragg ad
提出了一种基于直接序列扩频的可见光通信系统，扩频通信的方法以香农信息论作为理论基础，对可见光通信系统中扩频通信理论进行了分析，理论分析结果表明扩频通信方法可以缓解可见光通信系统的多径损耗，并且提高可见光通信系统安全性。对基于直接序列扩频的可见光通信系统进行了仿真，仿真结果表明系统性能相比直接检测系统有一定提高，扩频通信技术对提高可见光通信系统可靠性具有实际的意义。
The pulse time of arrival (TOA) is a determining parameter for accurate timing and positioning in X-ray pulsar navigation. The pulse TOA can be calculated by comparing the measured arrival time with the predicted arrival time of the X-ray pulse for pulsar