Metal cathode patterning for OLED by nanosecond pulsed laser ablation

Throughthe efforts of researchers for about two dec-ades since Tang invented organic light-emitting diode(OLED) in 1987[1],OLEDs are coming into practicalapplications as the displayfor some niche products ,suchas mobile phone,mp3 and etc .To make a matrix…     

New real-time image processing system for IRFPA

Infraredfocal plane array(IRFPA) is a kind of infra-red detector array whichis sensitive toinfraredradiationandintegrated with signal processing circuits .The IRF-PAi maging systemhas advantages of si mple configura-tion,high reliability,high sensitivity …     

Multilength two-dimensional codes for optical CDMA system

A new class of multilength, constant-weight and two-dimensional multiwavelength optical orthogonal code （2D MWOOCs） with large capacity and good correlation properties is constructed based on multilength one-dimensional （1D） OOCs. The performance of these new MWOOCs in an OCDMA network with double-services is analyzed. The result shows that media with the shorter codeword performs much better than the media with longer codeword, and OCDMA system with these new multilength MWOOCs performs well. These features allow multimedia transmission of large capacity in OCDMA system.     

Clean boxes with artificial climate for atomic force microscopy: New possibilities for diagnostics of nanodimensional objects

A clean box with an artificial climate is developed and designed to increase the accuracy of measurements by atomic force microscopy in the air and to improve the reproducibility of the results of diagnostics of the surface. The main functions of the box are the provision and maintenance of the temperature and humidity in the working zone with a high degree of accuracy and in various combinations. The main technical characteristics of the box are presented. The main advantages of operation under the conditions of an artificial climate are analyzed. It is shown that the special procedures give the possibility to eliminate the distorting effect of the static electricity on the surface under investigation and, specifically, to remove the already accumulated charge and prevent its appearance in the course of the experiment. The use of the suggested procedures allows one to correctly describe the specific features of the surface topography of dielectrics at the microscopic and nanoscopic levels.     

Pulsed digital holography for recording ultra-fast events

Thankstotherapiddevelopmentofthetechniquein ultra shortpulsedlaserandChargeCoupledDevice (CCD)duringthelatestdecades,pulseddigitalhologra phyhasshownitssuperioritiesinrecordingandrecon structingultra fastprocessing[1,2].Psaltisandhiscol leagueshavereportedsomeoftheirresultsinultra shortpulseddigitalholographyrecordingandreconstructing ultra fastprocessing,whereangularmultiplexingtech niqueisemployedtorecordasequenceofsub hologramsinasingleCCDframe,andeachofthesub holograms canbeindepende…     

Digital driver for 2-inch LTPS AM-OLED displays

Organiclightemittingdiode(OLED)displayshave beenattractingmoreattentionbecauseoftheirvariousadvantagesincludingsimplestructure,self emitting,fast responsetimeandwideviewingangle.Inthelastdec ade,thefocusofresearchisonimprovementofefficiency andreliability…     

New light-splitting system for a pure rotational Raman-lidar

Many research groups[1-3]have tried to measure theatmospheric temperature for alongti me by using eitheraninterference filter[1],an etalon[2]or a double gratingmonochromator[3]for detecting a single rotational Ra-man signal withthe low SNR.To gain a high …     

Rapid calibration for line structured light vision sensors

Withthe development of electronics ,i mage processingand computer techniques ,structured light 3D vision in-spection has gained wide acceptance.It is due tofast ac-quisition,very si mple optical arrangement ,low cost ,large field of viewandits robust natu…     

An automated stand for express-diagnostics of magnetoresistive structures

The design of an automated measuring stand for express-diagnostics of magnetoresistive structures are presented. This computer-controlled stand allows measurements of the magnetoresistances of film structures with high accuracy in a low alternating magnetic field. The stand has been tested on single- and multiple-layer magnetoresistive structures.     

Studies of the correction for phase diverse speckle

Phase diverse speckle is a novel kind of imaging technique and can be used to overcome image degradation from unknown phase aberrations, such as atmospheric turbulence. The wave-front phase expanded on the Zernike polynomials is esti- mated from a pair of images (in the focal and out of focus planes). In this paper the principle of PDS is analyzed, and genetic algorithm is used as the iterative algorithm to simulate some characteristics, such as the influence of Zernike polynomials’ mode, amplitude of turbulence on the phase estimation. Thus, a new method for recovery of images is explored.     

A novel algorithm for a rotation invariant template matching

A novel algorithm for a rotation invariant template matching is proposed when the fluctuating scope of the rotation angle is limited within the region of [-20°,20°]. The matching candidates are selected using a computationally low cost improved correlation algorithm. ＂AND＂ operation is adopted to reduce the computational cost. Therefore the algorithm improves the matching speed consumedly. The simulation results verify the efficiency of the proposed method. Moreover, when the size of reference image is fixed, the advantage of this time-saving algorithm is more obvious as the increase of the size of the real time image. The matching speed of the proposed method is over 20 times faster than the speed of the two-level pyramid decomposing accelerating method.     

Gradient descent approach for minimizing dissimilarity measure in log-polarimagery

The information received by the visual cortex is theresult of a log-polar conformal mapping of the retinalsti mulus[1].Indeed,the log-polar transformation hasbeen adoptedin numerous applications andisthe subjectof current research interest[2].Log-polar i …     

Spatial modulation for electronic speckle patterns and its demodulation

Several effective phase-measurement methods repor-ted[1-5]can be approxi mately classified in two groups :ti me phase-measurement and spatial phase-measure-ment .The former collects phase-shifting interferogramsin the same spatial position at different ti mes .On thecontrary,the latter records interferograms in differentspatial positions at the same ti me.When the measure-ment conditions are unstable or the dynamic problemisstudied,it is more effective to modulate fringe patternspatially.Becau…     

Channel Arrangement for optical communication subsystems with 12 parallel channels

This paper devoted to report the design and the achievement of an optical communication subsystem with 12 parallel channels in one chip. The system is capable of,transmitting 10 Gbps bidirectional date over hundreds of meters. It can provide error detection and correction by using 8B/10B encoding and Cyclical Redundancy Checking （CRC） encoding when only single-channel fails. The design scheme has already passed the simulation in FPGA. This technique is useful to enhance the capability and the reliability of the very short reach （VSR） transmission systems.     

Phosphosilicate glass film for optical waveguide by sol-gel method

In this paper, silica-on-silicon erbium-doped phosphosilicate glass film material was fabricated for optical waveguides by sol-gel method. Samples were characterized and analyzed. It is demonstrated that we have got well-distributed, good translucent, alterable thickness of film and glass state erbiumdoped phosphosilicate films material for optical waveguides by sol-gel method.     

Geometry constraints and matching algorithm for lunar rover stereo vision

China has started the lunar exploration project inclu-ding alunar satelliteto belaunchedin2007 .Inthe nextstep alunar rover will be requiredto move onthe lunarsurfacein alarge range for scientific goals . Vision sys-temis a crucial part of alunar rover sinceit isin chargeof building quantitative models of terrain geometry andmaking the spatial layout of the environment explicit .Many direct terrain-mapping techniques ,such as laserranging,have been developed for mobile robots on theearth andso…     

Wavelet method for processing white light interferogram from optical fiber interferometer

The precise determination of the ZOPDfor the whitelight interferometryis essential toits applicationsinthefield of measurements of surface profile,height ,anddepth,and quality control[1-5].The ZOPDis a positionininterferogram with the highest envelope pea…     

3-D profile measurement for complex micro-structures

Micro-structures 3-D profile measurement is an important measurement content for research on micromachining and characterization of micro-dimension. In this paper, a new method involved 2-D structure template, which guides phase unwrapping, is proposed based on phase-shifting microscopic interferometry. It is fit not only for static measurement, but also for dynamic measurement, especially for motion of MEMS devices. 3-D profile of active comb of micro-resonator is obtained by using the method. The theoretic precision in out-of-plane direction is better than 0.5 nm. The in-plane theoretic precision in micro-structures is better than 0.5 μm. But at the edge of micro-structures, it is on the level of micrometer mainly caused by imprecise edge analysis. Finally, its disadvantages and the following development are discussed.     

Non-contact inspection for inner surface of small-diameter pipes based on laser-PSD

Small diameterpipesareusedwidelyinmanyfields, suchasenergyindustry,chemicalindustry,aviation,weaponmanufacturingandsoon.Theinspectionof thesepipesisveryimportantbecauseofthebadworking conditions.Therearemanymethodstoinspectthepipeswithinnerdiameterslargerthan20mm,suchasthe wholecircleimagemethod[1],theringopticalcutting imagemethod[2],thelaser beamscanningdisplacementmeasuringtechnique[3],theCCTVcameramethod[4], Omni directionalmethod[5]etc.Butfewmethodscande tectthepipeswithaninnerdiameter…     

Combined optical fiber interferometric sensors for the detection of acoustic emission

A type of combined optical fiber interferometric acoustic emission sensor is proposed. The sensor can be independent on the laser source and make light interference by matching the lengths of two arms, so it can be used to monitor the health of large structure. Theoretical analyses indicate that the system can be equivalent to the Michelson interferometer with two optical fiber loop reflectors, and its sensitivity has been remarkably increased because of the decrease of the losses of light energy. PZT is powered by DC regulator to control the operating point of the system, so the system can accurately detect feeble vibration which is generated by ultrasonic waves propagating on the surface of solid. The amplitude and the fre- quency of feeble vibration signal are obtained by detecting the output light intensity of interferometer and using Fourier transform technique. The results indicate that the system can be used to detect the acoustic emission signals by the fre-quency characteristics.