搜索结果: 1-15 共查到“知识库 几何光学”相关记录37条 . 查询时间(1.906 秒)
基于几何感知图信号处理的动态点云配准（贾晓红）
几何感知 图信号处理 动态点云配准
2023/2/22
This study presents a high-accuracy, efficient, and physically induced method for 3D point cloud registration, which is the core of many important 3D vision problems. In contrast to existing physics-b...
直接液体冷却薄片激光器中抽运光均匀性对光束波前畸变的影响
激光器 直接液体冷却 波前畸变
2022/3/28
近年来,直接液体冷却薄片激光器因其体积功率比小,热管理能力强等优势而成为研究热点.本文建立了一套直接液体冷却薄片激光器波前畸变的分析方法.应用该方法研究了直接液体冷却薄片激光器中抽运光均匀性对光束波前畸变的影响.计算分析了均匀性为92%,80%和70%,且总的抽运功率不变时,激光器高阶像差分布情况.随着均匀性逐渐减弱,激光器中高阶像差逐渐增强,低阶像差量基本保持不变.实验中,设计加入波导和未加入波...
资剑、石磊课题组：实现光束在垂直入射情况下的横向位移（图）
光子晶体 动量空间偏振场 几何相位梯度 线偏振依赖
2022/5/16
复旦大学物理学系/应用表面物理国家重点实验室光子晶体课题组近期提出了，利用光子晶体的动量空间偏振场和动量空间几何相位梯度操控光束实空间偏振依赖位移的新机制，并在实验上直接观测了垂直入射光束的线偏振依赖的横向移动。相关研究成果以“Shifting beams at normal incidence via controlling momentum-space geometric phases” 为题...
BAYESIAN-BASED DESPECKLING IN WAVELET DOMAIN USING “A TROUS” ALGORITHM
Transformation Estimation SAR, Radar Statistics Multiresolution.
2015/7/29
In this paper an improved speckle noise reduction method is presented based on wavelet transform. A 2D Gaussian function is found
to be the best model fitted to the speckle noise pattern cross-secti...
A copper negative index metamaterial in the visible / near-infrared
copper negative index visible near-infrared Optics
2011/8/11
Abstract: We propose a design for a novel plasmonic copper metamaterial with an index of refraction equal to -1 at an operating wavelength of 700 nm. Using numerical simulations, we demonstrate negati...
二次曲面前房型有晶体眼人工晶体的球差矫正特性分析
视觉光学 非球面有晶体眼人工晶体 光学传递函数 泽尼克球差 塞得球差
2011/8/11
为探究二次曲面前房型有晶体眼人工晶体的球差矫正特性,进行了球面和二次曲面有晶体眼人工晶体的设计,并利用像差理论对二者的球差矫正特性进行了研究.基于R.Navarro等人提出的模型眼得到屈光不正眼模型,利用ZEMAX光学软件分别设计了可矫正屈光不正人眼的球面与二次曲面前房型有晶体眼人工晶体.通过对光学传递函数和Zernike球差系数的比较,以及对Seidel球差分布系数的计算分析发现:在保证屈光不正...
Gamma-Z box contributions to parity violating elastic e-p scattering
Gamma-Z box contributions parity violating elastic e-p scattering
2011/1/7
Parity-violating (PV) elastic electron-proton scattering measures Q-weak for the proton, QpW
. To extract QpW from data, all radiative corrections must be well-known. Recently, disagreement on the gZ...
Observing the Big Bounce with Tensor Modes in the Cosmic Microwave Background: Phenomenology and Fundamental LQC Parameters
Quantum gravity quantum cosmology
2010/12/21
Cosmological models where the standard Big Bang is replaced by a bounce have been studied for
decades. The situation has however dramatically changed in the last years for two reasons. First,because ...
Double -- photon exclusive processes with heavy quark -- heavy antiquark pairs in high-energy Pb-Pb collisions at LHC
Double -- photon exclusive processes heavy quark -- heavy antiquark pairs high-energy Pb-Pb collisions
2011/1/6
The cross section for exclusive heavy quark and heavy antiquark pair (Q¯Q) production in periph-eral ultrarelativistic heavy ion collisions is calculated for the LHC energy √sNN = 5.5 TeV. Here w...
The formal solution of the second order Killing tensor equations for the general pp-wave spacetime is given. The Killing tensor equations are integrated fully for some specific pp-wave spacetimes.
Optical structures, algebraically special spacetimes, and the Goldberg-Sachs theorem in five dimensions
algebraically special spacetimes Goldberg-Sachs theorem
2010/12/20
Optical (or Robinson) structures are one generalisation of four-dimensional shearfree congruences of null geodesics to higher dimensions. They are Lorentzian analogues of complex and CR structures. In...
External field influence on semiflexible macromolecules: geometric coupling
External field influence semiflexible macromolecules: geometric
2010/11/17
We suggested a geometric approach to address the external field influence on the DNA molecules, described by the WLC model via geometric coupling. It consists in the introduction of the effective metr...
Regular hyperbolicity, dominant energy condition and causality for Lagrangian theory of maps
Regular hyperbolicity dominant energy condition causality for Lagrangian theory of maps
2010/12/21
The goal of the present paper is three-fold. First is to clarify the connection between the dominant energy condition and hyperbolicity properties of Lagrangian field theories.
Superfield equations for the interacting system of D=4 N=1 supermembrane and scalar multiplet
Superfield equations interacting system of D=4 N=1 supermembrane scalar multiplet
2010/12/21
We present the superfield action for the dynamical N = 1 D = 4 supermembrane in interaction with a dynamical scalar multiplet and use it to derive the superfield equations of motion.
Gromov, Cauchy and causal boundaries for Riemannian, Finslerian and Lorentzian manifolds
Gromov Cauchy causal boundaries for Riemannian Finslerian Lorentzian manifolds
2010/12/21
Recently, the old notion of causal boundary for a spacetime V has been rede ned in a consistent way. The computation of this boundary @V on any standard conformally stationary spacetime V = R M, sug...