Abstract: According to the characteristics of Lambertian source,an approximate Lambertian source function was defined,an optical model of LED lens was designed,and then a LED sectional curve equation was obtainedSome relative data and modified data were obtained through solving the equation above by Runge-kutta method and a polynomial fitting by MATLABThe expecting data and simulated effect were extracted from LED approximate Lambertian source encapsulation model by TraceproFinally,a simplified designation method for LED approximate Lambertian source encapsulation model was proposed

Abstract: Since traditional camouflage evaluation methods are restricted by a lot of conditions,objective and quantificational evaluation method that can reflect real camouflage effect is necessary.Based on the quantized color histogram,the color similarity extent between camouflage pattern and actual background is evaluated quantificationally.And the texture similarity extent between camouflage and background is evaluated by method of combining grayscale concurrence matrix and wavelet transform.The method mentioned in this thesis not only can evaluate the similarity extent of camouflage and background,but also can reflect the texture similarity extent at different observe distance.

Abstract: With the development of infrared technology,the effect of infrared optical system should not be overlookedThe structural features of modern infrared optical system(such as off-axis three-mirror system,binary optical system and adaptive optical system) were analyzed on the basis of the summarizing traditional infrared optical system(such as reflective IR optical system,refractive IR optical system and catadioptric IR optical system)The advantages and disadvantages of traditional infrared optical systems and modern infrared optical systems were compared from the technical aspect,and the development tendency of the infrared optical system was exploredThere is some theoretical guidance role and significance in further research and development of new infrared optical system

Abstract: On account of the test condition of measuring the automation motion law,the data of test included some high frequency noisy need to be eliminated.The principle of the methods of smoothing data,such as moving average smoothing,locally weighted scatter plot smoothing and locally weighted robust scatter plot smoothing were discussed.And the data was simulated using the methods with different points.At the same time,the simulated data were compared with the result of differentiation directly,contrasted to the velocity curve of the firearms'automation which calculating by the testing system with higher precision.Finally the reasonable smoothing method is concluded from the result of comparison.

Abstract: The research on characteristic of the all-sky background brightness on day is developed.The sky background brightness is measured,the measurement data is analyzed.Based on the MORTRAN software,a corrected method to consummate the all-sky background brightness is given.The consummated all-sky background brightness data is applied to analyze detecting process,the applying result inosculates to the practicality situation which indicates that the consummated method can satisfy the requirement for application.

Abstract: As the video vehicle detecting has a great importance to the intelligent transportation system,a new moving vehicle detection method based on optical flow in complicated background was presentedTo deal with the hypothesis that the smoothness of optical flow and the conservation of gray intensity don't come into existence on the condition of shadow,boundary and overlap,a new forward-backward optical flow equation is introduced and the Hessian matrix of equation is computedThen the conditional number of the matrix is combined with the associated matrix of Lucas-Kanade's optical flow method to eliminate the restriction points which are not credible within local neighborhoodExperimental results show that the proposed method helps to obtain satisfying detecting results due to its good stability and high detecting accuracyThe results can be used as the basis of advanced vehicle control and traffic management in intelligent transportation systems

Abstract: The automatic recognition of coin denomination is a key technology for vending machines and coin sorting machines.The exterior appearance of the coin was used to recognition its denomination through capturing the image signal of the coin by using camera.Firstly,the invariant moments of coins image were extracted,then the neural network was used to classify the images for realizing the recognition of coin denomination.The experimental results show that the proposed method can achieve satisfying recognition results.

Abstract: The influence factors of the thermal effect of laser crystal were analyzed.Using the heat conductive equation,the relationship between area of surface and thermal change of end face caused by the asymmetry distribution of inner temperature was deduced.The thermal distortion and thermal focus of common columniform crystal and grooved crystal were calculated,respectively.And the results indicate that the thermal effect of laser crystal can be effectually improved by using the grooved crystal.

Abstract: A sapphire fiber blackbody cavity transient high temperature sensor based on contact and contactless integration are introduced.The blank-body cavity production and weak photoelectricity signal detection were analyzed.Finally,the testing results were also given.The experimental results show that after the new photoelectric detector and film material used,the temperature range and signal to noise ratio of the sensor was increased.The temperature sensor measuring range upper limit is greater than 2 000℃ and the response time less than 100 ms.It can meet the temperature measurement required by the research and industrial production in some specific environment.

Abstract: The terahertz absorption spectrum of the insensitive explosives RDX and HMX in the spectral range from 0 to 2.5 THz with terahertz time domain spectroscopy were detected.The terahertz absorption spectrum and the characteristic absorption peak of samples were acquired.And the position of characteristic absorption peak was determined,analyzed and compared with the detected absoption spectrum from other research institutes.The results show that the terahertz time-domain spectroscopy can be used to detect and identify explosives as well as the slight component change of samples.It also offers the scientific basis of establishing the fingerprint spectrum library with the terahertz time-domain spectroscopy.

Abstract: For improving the strain response sensitivity,this article proposes one fiber grating strain sensor based on titanium alloy substrate.The package uses titanium(TC4) as packaging material according to the theory of elastic modulus and uses barbell-like structure according to the transfer principle of mechanics.It obtains the strain response sensitivity and the correlation coefficient of reflection wavelength and strain.Experimental results show that the sensor which adopts this package design can obtain higher strain response sensitivity and better correlation coefficient of reflection wavelength and strain

Abstract: The continuous-wave Tm: YAP laser operating in room-temperature is studiedA 795 nm laser diode pumping Tm: YAP laser crystal using the way of thermoelectric refrigeration and air cooling was applied to realize 199 μm thulium laser output,the maximum output power is 135 W,the optical conversion efficiency is 282% and the slope efficiency is 36%Experimental analysis of the type of cavity affecting laser output and the operation temperature of crystal has been made

Abstract: Six current types of A/D converters were introduced,including working principle,circuit structure,performance characteristics and application fieldThrough analyzing the conversion rate,conversion accuracy,resolution,power consumption,price,size and other indicators,comparing the physical structure design with the actual performance,their appropriate applications were finally summed upThen,based on the technical characteristics of the existing A/D converters and performance requirements in practical application of the A/D converters,the technology trends of higher performance,lower power and simpler structure on A/D converters are predicted

Abstract: Based on four-quadrant photodetector,a double axle autotrack machinery equipment is designed with the low-power MSP430 SCM as its core.It enables the sun panel to keep being vertical to sunlight,so the utilization efficiency of solar energy was greatly improved.The equipment consists of the amplifying circuit,filter circuit,integrating circuit,A/D converter and precise stepping system.The linear tracking precision is up to 0.25 μm,and the tracking precision of coverage angle is 0.25 mrad.The research is helpful to the applications of solar energy.

Abstract: By analyzing the principles and shortcomings of traditional simulated annealing algorithm,an improved simulated annealing algorithm was proposed.To avoid missing current optimal solution,the new algorithm memorizes current best solution,and it also sets up dual-threshold to reduce the amount of calculation while maintaining optimality.After taking serious insights into spectral shape multiplexing and Simulated Annealing,an efficient energy increment calculation method was designed to speed up calculation.The results of simulation and experimental verify that the new algorithm converges faster and better than the traditional simulated annealing algorithm in solving the spectral shape multiplexing technique.

Abstract: The measure of warship wake bubble is a base for developing an underwater sound and light wake detector.The distribution characteristics of the warship wake were studied,and the difficulties in the bubble image measured by the image method were analyzed.A new method of bubble measure is put forward by use of high speed photography based line lighting lamp-house.The system of bubble controlling is established through the air pump and chinaware.The bubble image of different size is gained,and characteristic of bubble is analyzed based numeric image disposal.The result shows the measure of bubble characteristic by use of high speed photography based line lighting lamp-house is a good way.

Abstract: Research of laser interaction with polymers attracts more and more attentionApplications of interaction of laser and polymers are reviewed,including laser machining,laser beams control in liquid crystal optical elements,and micro laser plasma thrusterThe theory of laser interaction with polymers is introduced,and the ablation models are summarized,including photochemical model,photothermal model,steady-state model,plume shielding model and photothermal-photochemical modelThe experimental results of etching rate,ablation threshold and disassociation principle are summarizedThe possible research and new applications of laser interaction with polymers are put forward

Abstract: Image matching is a basis in the image processing and computer vision field,it comes from a number of practical problems.The primary task of Point feature matching is to extract the stability features,and to describe them.These features can maintain certain invariance to the image changes factors,such as rotation,zoom scale,affine transformations,and perspective changes,light changes etc.,to the object movement,occlusion,noise and other factors can also maintain good matching.A point-based scale and rotation invariant feature transform algorithm for the sub-pixel image registration is proposed.First of all the feature detection and identification are made in the scale space,the position and scale of key points are determined,and then use main direction of the neighborhood's gradient as the direction of the key point in order to achieve the independence of the operator of the scale and direction.The method is invariance to rotation,scale scaling and brightness changes,else maintaining a certain degree of stability to changes of perspective,affine transformation and noise.It is unique,informative and suitable for fast and accurate matching in the mass characteristics database.Being high-speed,the matching algorithm can achieve real-time requirements.

Abstract: The comsol software is used to simulate some integrated apparatus of the optical commuciaction such as photonic crystal fiber,waveguide,wave separater and filter.The result of simulation is very good.The advantages of photonic crystal devices can be more intuitively understood.It provides the useful information for the development of the apparatus of the optical commuciaction.

Abstract: The speed and posture of moving targets are an important matter in range measurement,using mirror to solve the problem of short trajectory tracked by the fixed high-speed camera.According to the moving discipline of projectile and relationship of imaging,the moving discipline of the mirror can be got,and so the eccentricity moment of the camera is zero any time.In addition there is another concern of motor and system request to be considered.Finally this system can get a whole procedure of the flying projectile,the length of image is in the rang of 1/5 to 3/5 of the CCD length,the angle of tracking area can reach to 90°.

Abstract: Starting from the principles and characteristics of fiber Bragg grating(FBG),the possibility to monitor the ice on power transmission line by using FBG sensors was experimentally and theoretically analyzed.The one-side and two-side simple supported beams were established,the relation between reflected wavelength of FBG and the loading on beams was studied.Then the experimental data was fitted by using least squares and thus the mathematical relation between wavelength offset and the loading on beams were obtained.The result shows that it is practical to monitor the weight of ice on power transmission line by FBG sensors.

Abstract: A composite median filtering algorithm and an adaptive median filtering algorithm are emphatically presented.For these two improved median filtering algorithms,the images with the noises such as Gaussian noise,salt and pepper noise,composite noise and high density noise were put through the remove noise process.Noise removal results of the algorithms on different types of images were compared.

Abstract: In the process of Mask Projection Stereolithography(MPS),the value of illumination on the view surface of MPS has serious influence on building accuracy.In order to improve the building accuracy of MPS,it is necessary to measure the illumination accurately.An illumination measuring system with Silicon Photocell is designed and developed.The system uses photocell to convert light signal into weak current signal,which is then sent to micro control unit in the form of voltage signal to carry out A/D conversion after I/V switching and amplification,and then the system calculates the actual illumination value according to the digital value and the linear sensitivity of Silicon Photocell.For adjusting gain of the amplification circuit automatically,the system adopts digital potentiometer as feedback element.The illumination value on the view surface of MPS is measured by the system,measured data is fit with MATLAB,and the relationship between illumination and gray is established in order to adjust illumination distributing on the view surface of MPS by changing gray.

Abstract: By studying and analyzing the preamplifier and main amplification circuits design in photoelectric conversion circuitry,the optimum handling way for circuit amplifying,filtering,noise reduction processing was given,the purpose of the useful signal separating and outputting from the noise was achievedThe various factors affecting the stability of performance parameters from the principle of photoelectric conversion circuit design to the final plate process were discussedThe criteria and the basis were put forward for the circuit device selections,arrangement,wiring,and noise reduction methods and so on

Abstract: Considering the problem that the nonlinear tracking-differentiators(NTD) cannot track all the input signals without error,the steady-state performance of the nonlinear tracking-differentiators in three different forms was discussed.The applicable scope of NTD was determined through analysis the characteristics of restrain function and steady-state error in typical input,and the deductive results were verified in simulation.The results show that the nonlinear tracking-differentiators are first-order indiscrimination systems which only can track the step signal without error.

Abstract: In order to study the damage effect of CCD detectors,the principle and method of mixture frequency laser by using double beams combination device was proposedThe double beams combination device by using the ZEMAX was emulated,and the far field light spot was collected in the meantimeThe thermal mechanical physical model of CCD light shading Al film irradiated by mixture frequency laser is set up based on heat conduction and thermal elastic mechanics theories,the heat conduction differential equation and stress-balance equation are solved by the semi-analytical method,the temperature field and thermal stress field of light shading Al film are obtainedThrough the numerical simulation,the damage effects of CCD by the laser source in different working modes were compared

Abstract: At present,anti-sniper EO detection includes two methods mainly,IR detection and laser detection.Taking U.S.A.,France,Israel and Russia for examples,the developments of anti-sniper IR and laser detection technology and equipment are introduced.From the advancement of EO detection materials,integration of detections and countermeasures,expansion of installation platform,fusion of multifunction,realization of network capability,the trends of anti-sniper EO detection technology and equipment are discussed lastly.

Abstract: To improve the measurement accuracy of open-loop fiber gyroscopes,the effects of nonideal optical component on the measurement accuracy are investigated in detailAccording to the structural feature,the Jones matrix models of different components in the fiber gyroscope are proposed and the intensity output of the fiber gyroscope is deduced with the methods of coherence matrix of partly polarized broadband source and transferring matrix theoreticallyThe polarization errors originating from the fluctuation of optical source power and polarization degree,the fluctuation of coupling ratio and alignment errors of the fiber fuse splice are also analyzedNumerical results demonstrate that the fluctuation of optical source would bring the most distinguish effect on the measurement accuracy of open-loop fiber gyroscopesThe polarization errors originating from the fluctuation of alignment errors of the fiber fuse splice lay the weakest effect on the measurement accuracy

Abstract: A design program of video capturing system based on PC104 is presented and a specific realization method of video capture card with PC104 interface based on FPGA is given.Two SRAM are used to do ping-pang operation for video caching,which reduces design cost.Communication is realized between video capture card with PC104 interface and host with Vxworks system,and the capture,display and save of the video are realized.