self-focusing

Analysis of transform from self-defocusing to self-focusing of LN crystal based on coupling theory;

LN晶体自散焦到自聚焦转换的耦合理论分析

Influences of Compton scattering on the small-scale self-focusing in the gain medium;

增益介质中Compton散射对小尺度自聚焦的影响

Experimental and Theoretical Study of Self-focusing and Spot-splitting of the Double-circle Spot Laser Beam in Kerr-medium;

双环斑激光束在克尔介质中的自聚焦和光斑分裂效应(英文)

Improved phase gradient autofocus algorithm based on adaptive isolated scatter selection;

一种改进的相位梯度自聚焦算法

Novel autofocus algorithm based on DCT for SAR images;

一种基于DCT的SAR图像自聚焦算法

Performance Analysis of the Typical Autofocus Algorithms for Synthetic Aperture Radar;

合成孔径雷达典型自聚焦算法性能分析

On the base of analyzing and mathematical derivation of self focusing in graded index fiber, this paper deduce the loca equation and transition time of meridional rays.

对渐变光纤的自聚焦性进行了详细的分析和数学推导,尤其针对抛物线型折射率分布和双曲正割型折射率分布的渐变光纤从子午射线的轨迹方程,以及子午射线的渡越时间两个方面进行了全面论证,从而证实了双曲正割型折射率分布对子午光线而言是一种最佳的折射率分布,避免了模色散。

We observe that the incoherent irradiation can increase the refractive index change, fasten greatly the process of self defocuisng, self focusing and the conversion from the former to the latter in LiNbO 3:Fe crystal, whether it propagates along the direction of the incident light or the opposite direction.

研究了非相干辐照对LiNbO3:Fe晶体中从自散焦到自聚焦的动态转换过程的影响和控制作用 。

We have further studied experimentally and theoretically the process of conversion from self-defocusing to self focusing in LiNbO 3:Fe crystals, which was reported in Acta Phys.

对文献 [1]中所报道的LiNbO3:Fe晶体从自散焦到自聚焦动态转换的过程 ,在实验和理论上作了进一步研究 。

The ray equation and the self-focusing character of light sign al in the optical fibre;

光纤中信号的射线方程及其自聚焦性质

The behavior of self-focusing of the ultra-intensity rotation symmetric super-Gaussian beam (RSSGB) during propagation in the plasmas is studied,with the aid of the numerical solution to the nonlinear paraxial wave equation.

通过数值求解非线性近轴波方程 ,研究了在等离子体中传输的超高斯强激光的自聚焦行为 。

The expressions for the spot size and the beam radius of curvature of Gaussian beam propagating in graded-index media with Kerr nonlinearity are obtained using the aberrationless model of self-focusing.

利用无象差自聚焦模型将梯度折射率非线性 Kerr介质等效为梯度折射率线性介质 ,得到了高斯光束在梯度折射率 Kerr介质中传输时光斑半径和波面曲率半径的表达式 ,进而讨论了高斯光束的自聚焦特性。

In the ISAR imaging of maneuvering targets, the time varying Doppler spectrum must be taken into account to produce a focused image,and above all,motion induced errors,such as envelope alignment errors and auto focusing phase errors,must be compensated to get a high quality image.

机动目标ISAR超分辨成像须考虑三维转动造成多普勒频率的时变性质 ,同时 ,成像质量也受到信号模型误差的影响 ,如包络对齐误差和自聚焦误差 。

Based on the analysis of airborne SAR imaging process and result of ships on ocean surface, contrast optimum auto focus algorithm is applied to estimate ship’s Doppler chip rate.

本文详细分析舰船运动对SAR成像的影响,对运动引起的二次相位误差应用分块对比度最优自聚焦算法进行补偿;对运动引起的一次相位误差利用估计多普勒中心频率的方法进行估计;文中提出的多普勒中心频率估计方法在图像域进行,给出该方法严格的公式证明和算法流程。

Design and implementation of optical auto-focus microscopy;

一种光学显微自动聚焦系统设计与实现

The implementation of step-motor drive and auto-focus based on FPGA;

基于FPGA的步进电机驱动及自动聚焦的实现

Study on the Auto-focusing Technology of Digital Image and Realization for an Auto-focusing System;

数字图像自动聚焦技术研究及系统实现

optical transmission and self-focusing fiber

光传输和自聚焦光纤

Characters and Image Features of Micro Self-focusing Ultrasound Transducer Used to Treat Cervical Lesions

用于治疗宫颈疾病的微型自聚焦超声换能器聚焦特性与图像特征

Study on Autofocus Technique and Speckle Reduction in SAR Image Formation;

SAR自聚焦技术及相干斑抑制算法研究

Research on Manufacture and Optimized Methods of GRIN-rod Lenses;

自聚焦透镜制造技术与性能优化研究

Non-paraxial Vector Theory for Self-focusing of Intens e Laser Beams;

强光束传输的非旁轴矢量自聚焦理论

Research on Phase Gradient Autofocus Algorithm for FMCW SAR

FMCW SAR相位梯度自聚焦算法研究

Coupler Loss of Self-Focusing Lens Used in Optical Communication

光通信用自聚焦透镜耦合损耗的研究

A Novel Auto-Focusing Coherent Wideband DOA Algorithm

一种新的自聚焦相干宽带DOA算法

SAS Autofocus Combined with Minimum Entropy

结合最小熵的SAS图像自聚焦研究

Small-Scale Self-Focusing of Divergent Beams in Gain Medium

增益介质中发散光束的小尺度自聚焦

Improved RDM for SAR Autofocusing

基于改进RDM的SAR自聚焦算法

The dynamic conversion from self-defocusing to self-focusing and the phase conjugate bright spatial soliton

从自散焦到自聚焦的动态转换和相位共轭亮空间孤子

autofocus zoom lens

自动聚焦变焦距镜头

Multi-focus Image Fusion Based on Automatic Focus Algorithm

基于自动聚焦算法的多聚焦图像融合

autofocus 35mm camera

自动聚焦35毫米相机

Numerical Research on Induced Focusing of Optical Beams in Self-defocusing Media;

自散焦介质中光束诱导聚焦的数值研究

Research on Auto-zooming & Focusing Visual Sensor and Calibration;

自动变焦聚焦视觉传感器及其标定问题研究

Study on Digital Image Auto-focusing and Restoration Technology of the Defocused Image

数字图像自动聚焦与离焦模糊复原技术研究