怎样使用象差自动校正程序进行光学设计

本文结合传统的光学设计方法,介绍了阻尼最小二乘法和适应法自动校正程序的原理和特点。着重说明用这两种程序进行光学设计的正确方法;说明自动校正程序在整个设计过程中的作用,以及设计人员应做的工作;分析了目前在使用象差自动校正程序过程中存在的问题。     

Matlab可视化在大学物理实验中的应用

利用Matlab的图形处理和科学计算能力,设计了物理实验数据处理程序,并对一些光学现象进行了仿真。结果表明,数据处理程序使用简单。光学仿真实验非常生动,能够完成实际光学实验难以实现的操作。     

美国GENⅡ-PC光学设计程序

<正> GEN Ⅱ-PC 光学设计程序是一个比较完善的光学设计和像质评价综合性程序,是目前美国各光学部门应用得最多的程序之一。该程序是美国Genesee 计算中心在1970年开始编制的。在1972年该程序增加了设计变焦距系统和多结构系统的能力,称为ZOOM GEN Ⅱ程序。在1976年又增加了David Grey 光学自动设计程序包,称为COOL/GEN Ⅱ程序。     

怎样使用象差自动校正程序进行光学设计(续)

<正> 二、使用阻尼最小二乘法程序应注意的几个问题使用阻尼最小二乘法程序进行光学设计的一般过程,可用下列框图表示。     

光学设计与微型机

本文共分四个部分阐述微型机的性能与特点,光学设计和微型机的关系,在微型机上进行光学程序设计中遇到的若干问题及其解决的办法;针对目前使用较多的中低档微型机速度较慢之缺点,着重介绍一种在光学计算方面既能提高效率,又易实现的程序设计处理方法——中心控制法。并以APPLE-Ⅱ微型机光线追迹程序为实例,简单地介绍一下光学设计在微型机的应用。     

OCAD与其他光学设计程序及应用软件的链接和互动

介绍了OCAD(optical CAD)光学设计软件包与国内外其他著名光学设计软件，如美国ORA公司的CodeV，Focus Software公司的Zemax，还有OSLO、LENSVIEW、ASAP和TRACEPRO等，以及国内SOD 88等的链接及互动方法。指出OCAD光学设计软件包本身不仅具有光学设计软件最基本的功能，而且可以利用自身功能界面随时调用上述软件程序为其所用，做到各程序间有效链接，行为互动;OCAD光学设计软件包还可以和文字处理及工作报表等通用程序，如Word和Excel等程序进行链接和互动。针对我国光学设计和光学制图的国家标准，部颁标准及企业标准推出了面向国内的OCAD光学设计软件包。提出目前国内外有关光学设计软件的功能及特点已非常丰富，没必要重复研制内容相同的新软件，只有针对自身的特殊需要研制一些专用应用软件即可。     

0.618法光学自动设计程序点列图光学传递函数计算程序

<正> 北京工业学院工程光学系陈晃明副教授所编0.618法光学自动设计和点列图光学传递函数计算程序,曾荣获1981年国务院国防工业办公室重大技术改进四等奖和1985年兵器工业部软件交流交易会一等奖。该软件能够在IBM-PC/XT和PDP-11/23两种微型计算机上使用,具有光路和象差计算、焦截距计算、焦距缩放、     

基于ZEMAX软件的三组元变焦系统凸轮曲线设计程序

变焦系统凸轮曲线设计是变焦系统后期设计过程中十分重要的环节,曲线设计的好坏直接关系到系统像面的稳定程度.针对ZEMAX光学设计软件界面编写了三组元变焦系统凸轮曲线设计程序,确保像面稳定、像质优良.程序可准确给出凸轮曲线的数据和形状,借助该程序对变焦系统任意焦距位置的光学性能和像差特性进行实时评估,提高了变焦系统的设计效...     

在定域法中实现光学全局优化

把不等式法用于光学优化设计中,同时使用了“逃逸函数”技术,从而实现了光学系统设计的全局优化在使用逃逸函数时,两个因子H和W的确定是能否“逃逸”优化“陷阱”的关键用这种技术借助于C++开发的程序成功地设计了一些典型的光学系统.     

光学系统设计中全局优化方法的实现

 把变尺度法用于光学优化设计中，同时使用了“逃逸函数”技术, 从而实现了光学系统设计的全局优化。在使用逃逸函数时，两个因子H和W的确定是能否“逃逸”优化“陷井”的关键。用这种技术借助于C语言开发的程序成功地设计了一典型的光学系统。     

Femtosecond Transform-Limited Pulse Generation by Compensating for the Linear Chirp of SPM Spectra in Dispersion Shifted Fibers

A simple technique of pulse compression, based on the linear chirp compensation of self-phase modulation (SPM) spectra in dispersion shifted fibers, is demonstrated. The optimization procedure is carried out, for a short span of a single-mode fiber, using a parabolic law, which describes the behavior of the squared output pulse width versus the pump peak power in the case of Gaussian pulses. The experimental results give a minimum pulse duration of 233 fs, which is in good agreement with the model. Shorter and coherent pulses, down to 90 fs, have been obtained by inserting an interference filter at the optical output.     

Sorting of bending magnets for the SSRF booster

The Shanghai Synchrotron Radiation Facility(SSRF)booster ring,a full energy injector for the storage ring,is deigned to accelerate the electron beam energy from 150MeV to 3.5GeV that demands high extraction efficiency at the extraction energy with low beam loss rate when electrons are ramping.Closed orbit distortion(COD)caused by bending magnet field uniformity errors which affects the machine performance harmfully could be effectively reduced by bending magnet location sorting.Considering the affections of random errors in measurement,both ideal sorting and realistic sorting are studied based on measured bending magnet field uniformity errors and one reasonable combination of bending magnets which can reduce the horizontal COD by a factor of 5is given as the final installation sequence of the booster bending magnets in this paper.     

Soliton squeezing generated in an all-fiber contiguration

We experimentally demonstrate amplitude squeezed soliton utilizing intensity-dependent self-phase modulation in an asymmetric Sagnac interferometer.The system.whose components are connected via ferrule connector/physical connection(FC/PC)fiber connectors,constitutes all-fiber configuration to generate squeezed soliton.Soliton amplitude reduction measured by homodyne detection is near 4.0 dB below the shot-noise level.Optimal squeezing fields in both simple and compact all-fiber configuration are obtained.     

Propagation of light in(2+1)-dimensional nonlinear optical media with spatially inhomogeneous nonlinearities

The(2 1)-dimensional nonlinear Schr(o)dinger(NLS)equation with spatially inhomogeneous nonlinearities is investigated,which describes propagation of light in(2 1)-dimensional nonlinear optical media with inhomogeneous nonlinearities.New types of optical modes and nonlinear effects in optical media are presented numerically.The results reveal that the regular split of beam can be obtained in (2 1)-dimensional nonlinear optical media with inhomogeneous nonlinearities,by adjusting the guiding parameter.Furthermore,the stability of beam regular split is discussed numerically,and the results reveal that the beam regular split is stable to the finite initial perturbations.     

A novel pose and illumination robust face recognition with a single training image per person algorithm

In the real-world application of face recognition system, owing to the difficulties of collecting samples or storage space of systems, only one sample image per person is stored in the system, which is so-called one sample per person problem. Moreover, pose and illumination have impact on recognition performance. We propose a novel pose and illumination robust algorithm for face recognition with a single training image per person to solve the above limitations. Experimental results show that the proposed algorithm is an efficient and practical approach for face recognition.     

Testifying experiment of the multi-pulse phenomena of capillary discharge soft-X-ray laser

In a capillary discharge experiment for the neon-like argon lasing, we have proposed an experimental scheme to verify that the multi-spike of X-ray diode (XRD) signal is a multi-pulse laser or is a reflection of the laser pulse in the XRD.The ceramic capillary has an inner diameter of 3mm and a length of 200mm.At the gas pressure of 28Pa and discharge current of 27kA, stable lasing has been realized.The experimental results prove that the multi-spike of XRD signal is a reflection of the electromagnetic signal produced by the laser pulse in the XRD.The improved electrocircuit scheme of the XRD to minimize the reflection phenomena is also found.     

Optical system and lens design for Blu-ray disc optical pick-up

During the design process of Blu-ray disc optical pick-up (BD OPU), the optical system and the collimator lens design is especially important. This paper designs an optical system and some lenses for the BD OPU, including collimator lens, beam shaping lens for laser beam shaping, and cylinder lens for signal detecting. In this OPU, we use a triplet lens to collimate the laser beam. At the same time, we build a series of assembly jigs to make sure that each lens can be put into the OPU basement properly. At last, we get the reading spot image and S-curve photo of OPU, which can be used to read Blu-ray disc (BD).     

Stable anticipation synchronization in mutually coupled vertical-cavity surface-emitting lasers system

Two vertical-cavity surface-emitting lasers(VCSELs) are mutually coupled through a partially transparent mirror (PTM) placed in the pathway. The PTM plays the role of external mirror,which controls the feedback strength and coupling strength.We numerically simulate this system by establishing a visible SIMULINK model.The results demonstrate that the anticipation synchronization is achieved and it can tolerate some extent frequency detuning.Moreover,the system shows similar chaos-pass filtering effect on unidirectionally coupled system even both VCSELs are modulated.This system allows simultaneously bidirectional secure message transmission on public channels.     

Terahertz optical asymmetric demultiplexer based tree-net architecture for all-optical conversion scheme from binary to its other 2n radix based form

To exploit the parallelism of optics in data processing,a suitable number system and an efficient encoding/decoding scheme for handling the data are very essential.In the field of optical computing and parallel information processing,several number systems like binary,quaternary,octal,hexadecimal,etc.have been used for different arithmetic and algebraic operations.Here,we have proposed an all-optical conversion scheme from its binary to its other 2n radix based form with the help of terahertz optical asymmetric demultiplexer (TOAD) based tree-net architecture.