Abstract:;为寻求光学多波段干扰的有效途径,研究了泡沫这种新型环保长效的宽波段干扰介质.采用Mie氏理论,计算分析了在不同泡沫溶液复折射率情况下,在军事上两种常用激光波长(1.06μm、10.60μm)处和红外波段(3μm～5μm、8μm～14μm)以及可见光波段(0.38μm～0.76μm)内单个泡沫球的体积消光性能与泡沫球尺寸和壁厚的关系.计算分析结果表明,在不同的波长处或波段内,具有不同泡沫溶液复折射率的最优泡沫球体积消光系数所对应的泡沫球尺寸及壁厚是不同的.

Abstract:In accordance to the accurate Voigt profile expression obtained by using the Fourier trans- form method,the relationship among the half widths of the Voigt profile,the Gaussian profile and the Lorentzian profile is calculated with the Taylor series.The relation curves among them are drawn and their results are discussed.Through the further discussion,it is found that the relationship between the ratio of the half width of the Voigt profile to that of the Gauseian profile and the ratio of the half width of the Lorentzian profile to that of the Gaussian profile is one-fourth in the first quadrant.This method is very convenient for practical applications and is rather accurate.

Abstract:In this paper,the particular application of TLC2543,a 12bit A/D converter chip in a measurement system of optical attenuation in waveguide is presented.A data acquisition and real time display system is constructed of a 89C51 single chip microcomputer,a TLC2543 A/D converter chip and a RS232 interface.This system has the advantages of easy realization,easy programming and high precision.Therefore,it is very promising.

Abstract:According to the theory of infrared radiation and the measurement principle of an infrared thermal imager,the temperature calculation formula and measurement procedure of an infrared thermal imager were obtained,the effect of the temperature of an uncooled microbolometer on temperature measurement was analyzed and the corresponding correction formula and methods were deduced.The two correction methods obtained were simple and easy to implement.They provided certain methods and considerations for the design,manufacture and practical use of an uncooled microbolometer array thermal imager.

Abstract:As the front processing unit in an infrared imaging system,target detection is one of the important parts in precision-guidance and is also a critical technique or difficult problem.Only if the target in the scene is detected in time,a series of subsequent processing such as target tracking,target recognition and so on can be implemented smoothly.To find the target as soon as possible so as to let the system have enough time to react against it,the target must be detected at a very long distance. Therefore,the detection of the target in a complicated infrared scene becomes a very urgent problem to be solved.The discovery and study of new theory and algorithms for small target detection and how to use the current detection theory in small target detection is still a most important subject and is of great significance.

Abstract:The black neutral pen ink is mainly composed of solvent,pigment,thickening agent,stabilizer and other chemical additives.The chemical composition of the black neutral pen ink produced by different manufacturers is different and the chemical composition of the different black neutral pen ink produced by one manufacturer is also different.This provides the basis for the kind discrimination of neutral pen ink. In this paper,the Fourier Transform Infrared Spectroscopy(FT-IR)is used to determine the composition of 32 kinds of black neutral pen ink on the market.According to the peak position,peak number,peak form and peak strenth in infrared spectra,the black neutral pen ink produced by different manufacturers or the different black neutral pen ink produced by one manufacturer can be discriminated.This method has the features of quickness,accuracy and high sensitivity and is nondistructive to samples.

Abstract:In accordance with the abstractness of optical theory,the diffraction experiment of a sine grating is simulated by using the Matlab and a conclusion that the difference between a sine grating and a black and white grating in diffraction is the transmittance of the aperture and the distance of one step and zero step bright lines of the sine grating is proportional to the grating frequency,transfer distance and the wavelength of the incident light and is independent of the grating parameters is derived.This provides the theoretical basis for the further widening of the application of the sine gratings.

Abstract:By using a piece of GaAs crystal grown at low temperature as a passively saturated absorber as well as a output coupler,a passively Q-switched mode-locking Nd;GdYVO_4 laser is demonstrated. The fundamental frequency and Q-switched output properties of the Nd:GdYVO_4 laser are studied. The experimental results show that when a planar mirror is used as the output mirror and the incident pumping power is 10W,the output power of 3.5W and the optical-optical conversion efficiency of 35% can be obtained;when GaAs is used as the output mirror,the threshold power for Q-switching mode-locked is 1.2W;and when the incident pumping power is 10W,the output power of 1.88W and the mode-locked pulse train with a repetition rate of 114MHz can be obtained.At the incident pumping power of 7W,the modulation depth of the Q-switchlng mode-locking pulse is up to 100%;at the incident pumping power of 8W,the output power of 1.58W,the Q-switched envelope pulse train with a repetition rate of 91kHz and the full width at half maximum(FWHM)of 43.2nm can be obtained.

Abstract:In this paper,the theory of an optical wave-guide amplifier is presented,the aggregation effect caused by the small absorption cross-section and exorbitant concentration of Er ions are analyzed and the cooperative upconversion and excited absorption caused by the aggregation effect are considered to be able to limit the gain of a Yb-Er doped phosphate wave-guide amplifier.The incorporation of Yb ions as the sensitizer into the optical wave-guide amplifier can not only reduce the aggregation effect due to the high concentration of Er ions,but also solve the gain problem for the optical wave-guide effectively. On the basis of the cooperative upconversion effect considered,a Longku algorithm is used to study the Yb-Er co-doped optical wave-guide amplifier.Two main factors i.e.Yb ion concentration and wave-guide length are discussed and the optimum wave-guide length and Yb ion doping concentration are calculated.

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Abstract:分析了红外接收芯片的原理,对主要模块提出了较新颖的实现电路.采用上华0.5μm CMOS工艺对整个电路进行了仿真,电源电流仅为0.8mA,实现了低功耗,最小脉冲宽度为6个脉冲,最小脉冲间隔为10个脉冲,指标均高于市场同类产品.

Abstract:第二部分 十一、非致冷焦平面列阵及应用 66.以色列半导体器件公司的微测辐射热计技术的新特点和发展方向(U.Mizr出等) 67.BAE系统公司的非致冷VOz热成像系统(Richard BlackWell等) 68.美国雷神视觉系统公司的战术用非致冷传感器的发展(S.Black等)