Effective Fresnel number and the focal shifts of focused partially coherent beams [0.03%]
有效弗伦克尔数及聚焦部分相干光束的焦移现象
Meimei Dong,Jixiong Pu
Meimei Dong
We define the effective Fresnel number of the cylindrical lens illuminated by a plane wave or Schell-model beams. On the basis of the concept of the effective Fresnel number, the focusing properties of the cylindrical lens illuminated by th...
Simultaneous dual free spectral range microwave photonic filter using a high-birefringence chirped grating in a Sagnac loop [0.03%]
基于萨格纳克环的高双折射渐变光栅的同时双自由光谱范围微波光电滤波器
Guoxiang Ning,Ping Shum,Sheel Aditya et al.
Guoxiang Ning et al.
We propose a continuously tunable, dual free spectral range (FSR) photonic microwave notch filter configuration using a high-birefringence linearly chirped fiber Bragg grating (Hi-Bi LCFBG) that is connected in a Sagnac loop using a Hi-Bi c...
Realization of an optical communication tunable filter using a diffraction-based optical system [0.03%]
基于衍射的光学系统实现可调滤波器光学通信中的应用研究
Gal Shohet,Zeev Zalevsky,Emanuel Marom
Gal Shohet
Optical bandpass tunable filters are key elements for dense WDM optical communication systems. Recently, a realization of optical linear transformation using a spatial diffraction optical system was presented and theoretically analyzed [J. ...
Validation of radiographic simulation codes including x-ray phase effects for millimeter-size objects with micrometer structures [0.03%]
包括X射线相位效应的射线模拟代码的验证：毫米级样品微米结构的影响
Harry E Martz Jr,Bernard J Kozioziemski,Sean K Lehman et al.
Harry E Martz Jr et al.
The mix between x-ray phase and attenuation information needs to be understood for accurate object recovery from radiography and tomography data. We are researching and experimentally validating algorithms that simulate x-ray phase contrast...
Theoretical analysis of three-dimensional imaging and recognition of micro-organisms with a single-exposure on-line holographic microscope [0.03%]
单次曝光全息显微镜三维成像及微米量级生物粒子识别的理论分析
Adrian Stern,Bahram Javidi
Adrian Stern
Single-exposure on-line (SEOL) digital holography is a recently proposed technique for monitoring, visualization, and recognition of three-dimensional (3D) objects. In contrast to traditional multi-exposure on-line digital holography, it us...
Halil T Eyyuboğlu,Yahya Baykal
Halil T Eyyuboğlu
Based on the generalized beam formulation, we derive the scintillation index and selectively evaluate it for cos-Gaussian and annular beams propagating in weak atmospheric turbulence. Dependence of the scintillation index on propagation len...
Guang-Ming Dai,Virendra N Mahajan
Guang-Ming Dai
Imaging through atmospheric turbulence by systems with annular pupils is discussed using the Zernike annular polynomials. Fourier transforms of these polynomials are derived analytically to facilitate the calculation of variance and covaria...
Polarization of 'water-skies' above arctic open waters: how polynyas in the ice-cover can be visually detected from a distance [0.03%]
北极开阔海域“水天相接”的偏振特性：浮冰区波光的遥感探测原理研究
Ramón Hegedüs,Susanne Akesson,Gábor Horváth
Ramón Hegedüs
The foggy sky above a white ice-cover and a dark water surface (permanent polynya or temporary lead) is white and dark gray, phenomena called the 'ice-sky' and the 'water-sky,' respectively. Captains of icebreaker ships used to search for n...
Generalized Lorenz-Mie theory for an arbitrarily oriented, located, and shaped beam scattered by a homogeneous spheroid [0.03%]
任意方位、位置和形状的光束散射到均匀椭球体的广义洛伦兹-米氏理论
Feng Xu,Kuanfang Ren,Gérard Gouesbet et al.
Feng Xu et al.
The theory of an arbitrarily oriented, shaped, and located beam scattered by a homogeneous spheroid is developed within the framework of the generalized Lorenz-Mie theory (GLMT). The incident beam is expanded in terms of the spheroidal vect...
Expansion of an arbitrarily oriented, located, and shaped beam in spheroidal coordinates [0.03%]
任意定向、定位和形状的光束在椭球坐标系中的伸展变换式
Feng Xu,Kuanfang Ren,Xiaoshu Cai
Feng Xu
Within the framework of the generalized Lorenz-Mie theory (GLMT), the incident shaped beam of an arbitrary orientation and location is expanded in terms of the spheroidal vector wave functions in given spheroidal coordinates. The beam shape...