基于DSP FPGA的Camera Link接口相机的图像处理平台设计

以FPGA和DSP为中心,设计实现了Camera Link接口相机的数字图像数据的VGA和PAL双制显示,解决了数字图像数据由FPGA与DSP之间高速、大数据量的实时传输.DSP对数据进行实时处理后,经千兆网络向控制计算机终端传输图像数据,解决了相机数据传输距离的限制,拓展了高速网络相机的应用范围.     

红外Cameralink相机合成信号源设计

光电跟踪设备与控制舱之间图像数据和控制信息的传输对光电设备正常工作是至关重要的。为了在实验室完成对光电跟踪设备的传输系统的模拟调试,设计了图像数据和附加信息的合成信号源。本设计基于CameraLink接口的相机,以Altera公司的FPGA为核心,配合CameraLink接口电路、附加信息的串口转换电路完成硬件设计;FPGA采用两个内部DPRAM配合工作,均使用不同读写时钟,通过控制读写使能和地址变换完成图像数据和附加信息的逻辑设计。结果显示系统在外同步信号控制下,正确完成信息合成,可由图像采集卡正确采集和显示。     

智能相机的通信程序设计与实现

随着智能相机的快速发展,对图像传输速度、实时响应速度的需求越来越高.针对当前智能相机在生产作业期间对数据传输的应用需求,设计实现了一个基于UDP(User Datagram Protocol)的图像传输与控制通信程序.通信程序基于内部集成ARM+FPGA结构的Zynq-7000芯片,制定了私有通信协议,采用基于UDP/IP的传输方式,降低设备端通信处理复杂度.采用有线连接方式,降低外界干扰,使用巨型帧技术,提高智能相机传输系统的传输速度.测试验证结果表明,图像数据传输速率满足应用需求,500万像素的高清图像数据传输速率达到了17fps,且具备了较高的可靠性.     

基于虚拟信道的SpaceWire总线网络技术应用研究

针对卫星载荷数据传输特点及CCSDS AOS协议虚拟信道处理的具体应用,结合SpaceWire总线传输协议,提出了一种基于虚拟信道的SpaceWire总线网络传输策略,该策略面向载荷数据处理与传输需求,优化了数据处理过程,提高了SpaceWire总线网络传输效率;减少了系统存储、调度资源,提供了系统可靠性。     

基于虚拟信道的Space Wire总线网络技术应用研究

针对卫星载荷数据传输特点及CCSDSAOS协议虚拟信道处理的具体应用,结合SpaceWire总线传输协议,提出了一种基于虚拟信道的SpaceWire总线网络传输策略,该策略面向载荷数据处理与传输需求,优化了数据处理过程,提高了SpaceWire总线网络传输效率;减少了系统存储、调度资源,提供了系统可靠性。     

多相机系统中高速串行图像数据复接方法

由于单台推扫式相机(或成像光谱仪)视场较窄,通常采用多个相机模块进行视场拼接.针对相机的图像数据具有分辨率高、数据量大特点,提出了一种基于CCSDS的高速复接的传输方法.高速复接电路采用FPGA产生各种控制信号,选用TI的SN65LVl023和SN65LVl224串化解串芯片,把模拟的相机数据转化为一对LVDS差分信号...     

SpaceWire总线网络实时传输性能研究

SpaceWire总线是专为空间应用设计的一种高速的星载总线标准,是当前和未来的空间任务数据处理系统的基本架构。然而对与SpaceWire总线网络实时性性能的研究仍不完备,无法保证总线用于可靠传输实时性要求高的关键控制信息。故提出一种基于虫洞路由网络传输建模的SpaceWire总线网络实时性性能分析计算方法。分析和仿真结果为实时传输的SpaceWire总线网络的设计提供了理论依据。     

基于NIOS Ⅱ的光纤以太网CCD相机系统设计

光纤以太网络相机是目前最具前景的相机应用模式之一.设计了基于NIOS Ⅱ的光纤以太网相机系统,利用FPGA的N1OS Ⅱ内核对网卡芯片W315OA进行配置及驱动,实现图像采集模块与计算机通过TCP/IP协议实现网络传输数据.该相机系统能在1S之内完成一幅2MByte图像数据的网络传输,在速度上能满足系统的技术要求.文章介绍了系统的实现方案.

Abstract：

Optical fiber Ethernet camera is one of the most promising application modes of cameras.With the chip W3150A,which is configured and driven by NIOSⅡ core of FPGA,the data transfer between the image acquisition module and a computer is realized through TCP/IP.2 Mbyte image data can be transferred within Is,which meets the technical requirement.The scheme based on NIOS Ⅱ is presented.     

基于Camera Link的红外图像显示研究

为红外相机设计了一套基于Camera Link的红外图像实时显示系统.红外探测器产生的模拟信号经模数转换后,由作为控制核心的FPGA进行处理,然后通过光纤实现远距离传输.接收端的FPGA将信号转换成Camera Link协议数据,再将它们传送给上位机的图像采集板卡进行采集和转换,最终通过上位机软件将其实时显示出来.     

基于FPGA+DM36X的IP摄像机平台

针对目前安防监控设备动态范围较低的问题,文中提出了基于FPGA和DM36X的高动态范围网络摄像机方案。该方案采用高动态图像传感器进行图像采集,并以FPGA和DM36X作为图像处理的核心。FPGA负责对高动态图像进行增强处理,弥补了DM36X对高动态图像处理的不足,并结合DM36X在视频图像编码及传输上的优势,最终实现1 280×720每秒30帧的高动态范围视频图像的采集、处理和传输。     

Resolution Enhancement Technology:Integrated Process Solutions using OPC

DUV lithography, using the 248 nm wavelength, is a viable manufacturing option for devices with features at 130 nm and less. Given the low kl value of the lithography, integrated process development is a necessary method for achieving acceptable process latitude. The application of assist features for rule based OPC requires the simultaneous optimization of the mask, illumination optics and the resist.Described in this paper are the details involved in optimizing each of these aspects for line and space imaging.A reference pitch is first chosen to determine how the optics will be set. The ideal sigma setting is determined by a simple geometrically derived expression. The inner and outer machine settings are determined, in turn,with the simulation of a figure of merit. The maximum value of the response surface of this FOM occurs at the optimal sigma settings. Experimental confirmation of this is shown in the paper.Assist features are used to modify the aerial image of the more isolated images on the mask. The effect that the diffraction of the scattering bars (SBs) has on the image intensity distribution is explained. Rules for determining the size and placement of SBs are also given.Resist is optimized for use with off-axis illumination and assist features. A general explanation of the material' s effect is discussed along with the affect on the through-pitch bias. The paper culminates with the showing of the lithographic results from the fully optimized system.     

Cost-effective test solutions for smart card and other integrated flash applications

From its emergence in the late 1980s as a lower cost alternative to early EEPROM technologies, flash memory has evolved to higher densities and speedsand rapidly growing acceptance in mobile applications.In the process, flash memory devices have placed increased test requirements on manufacturers. Today, as flash device test grows in importance in China, manufacturers face growing pressure for reduced cost-oftest, increased throughput and greater return on investment for test equipment. At the same time, the move to integrated flash packages for contactless smart card applications adds a significant further challenge to manufacturers seeking rapid, low-cost test.     

Theoretical analysis of the relationship between the Brillouin gain coefficient and the strain in the optical-fiber sensors

The relation between the power of the Brillouin signal and the strain is one of the bases of the distributed fiber sensors of temperature and strain. The coefficient of the Bfillouin gain can be changed by the temperature and the strain that will affect the power of the Brillouin scattering. The relation between the change of the Brillouin gain coefficient and the strain is thought to be linear by many researchers. However, it is not always linear based on the theoretical analysis and numerical simulation. Therefore, errors will be caused if the relation between the change of the Brillouin gain coefficient and the strain is regarded as to be linear approximately for measuring the temperature and the strain. For this reason, the influence of the parameters on the Brillouin gain coefficient is proposed through theoretical analysis and numerical simulation.     

An improved parallel thinning algorithm with two subiterations

The parallel thinning algorithm with two subiterations is improved in this paper. By analyzing the notions of connected components and passes, a conclusion is drawn that the number of passes and the number of eight-connected components are equal. Then the expression of the number of eight-connected components is obtained which replaces the old one in the algorithm. And a reserving condition is proposed by experiments, which alleviates the excess deletion where a diagonal line and a beeline intersect. The experimental results demonstrate that the thinned curve is almost located in the middle of the original curve connectivelv with single pixel width and the processing speed is high.     

Novel fiber-optical interferometer with miniaturized probe for in-hole measurements

Today, micro-system technology and the development of new MEMS （Micro-Electro-Mechanical Systems） are emerging rapidly. In order for this development to become a success in the long run, measurement systems have to ensure product quality. Most often, MEMS have to be tested by means of functionality or destructive tests. One reason for this is that there are no suitable systems or sensing probes available which can be used for the measurement of quasi inaccessible features like small holes or cavities. We present a measurement system that could be used for these kinds of measurements. The system combines a fiber optical, miniaturized sensing probe with low-coherence interferometry, so that absolute distance measurements with nanometer accuracy are possible.     

Development of the readout system for waveguide multilayer optical card

Waveguide multilayer optical card （WMOC） is a novel storage device of three-dimensional optical information. An advanced readout system fitting for the WMOC is introduced in this paper. The hardware mainly consists of the light source for reading, WMOC, motorized stages addressing unit, microscope imaging unit, CCD detecting unit and PC controlling ＆ processing unit. The movement of the precision motorized stage is controlled by the computer through Visual Basic （VB） language in software. A control panel is also designed to get the layer address and the page address through which the position of the motorized stages can be changed. The WMOC readout system is easy to manage and the readout result is directly displayed on computer monitor.     

Study of waveguide coupling efficiency in hybrid silicon lasers

This paper presents a new method to increase the waveguide coupling efficiency in hybrid silicon lasers. We find that the propagation constant of the InGaAsP emitting layer can be equal to that of the Si resonant layer through improving the design size of the InP waveguide. The coupling power achieves 42% of the total power in the hybrid lasers when the thickness of the bonding layer is 100 nm. Our result is very close to 50% of the total power reported by Intel when the thickness of the thin bonding layer is less than 5 nm. Therefore, our invariable coupling power technique is simpler than Intel＇s.     

Collinear phase-matching study of terahertz-wave generation via difference frequency mixed in GaAs and Inp

The collinearly phase-matching condition of terahertz-wave generation via difference frequency mixed in GaAs and InP is theoretically studied. In collinear phase-matching, the optimum phase-matching wave hands of these two crystals are calculated. The optimum phase-matching wave bands in GaAs and lnP are 0.95-1.38μm and 0.7-0.96μm respectively. The influence of the wavelength choice of the pump wave on the coherent length in THz-wave tuning is also discussed. The influence of the temperature alteration on the phase-matching and the temperature tuning properties in GaAs crystal are calculated and analyzed. It can serve for the following experiments as a theoretical evidence and a reference as well.     

Effects of the alloy compositions on the phonon-polaritons in ternary mixed crystals

Composition dependence of bulk and surface phonon-polaritons in ternary mixed crystals are studied in the framework of the modified random-element-isodisplacement model and the Bom-Huang approximation. The numerical results for Several Ⅱ - Ⅵ and Ⅲ- Ⅴ compound systems are performed, and the polariton frequencies as functions of the compositions for ternary mixed crystals AlxGa1-xAs, GaPxAS1-x, ZnSxSe1-x, GaAsxSb1-x, GaxIn1-xP, and ZnxCd1-xS as examples are given and discussed. The results show that the dependence of the energies of two branches of bulk phonon-polaritons which have phonon-like characteristics, and surface phonon-polaritons on the compositions of ternary mixed crystals are nonlinear and different from those of the corresponding binary systems.     

New insert layer structure OLEDs

An insert layer structure organic electroluminescent device（OLED） based on a new luminescent material （Zn（salen）） is fabricated. The configuration of the device is ITO/CuPc/NPD/Zn（salen）/Liq/LiF/A1/CuPc/NPD/Zn（salen）/Liq/LiF/A1. Effective insert electrode layers comprising LiF（1nm）/Al（5 nm） are used as a single semitransparent mirror, and bilayer cathode LiF（1 nm）/A1（100 nm） is used as a reflecting mirror. The two mirrors form a Fabry-Perot microcavity and two emissive units. The maximum brightness and luminous efficiency reach 674 cd/m^2 and 2.652 cd/A, respectively, which are 2.1 and 3.7 times higher than the conventional device, respectively. The superior brightness and luminous efficiency over conventional single-unit devices are attributed to microcavity effect.