In order to measure the reflectivity of large-aperture and high-reflectivity optical elements in high energy laser transmission system, a precision measurement system for two-dimensional scanning of largeaperture optical elements was designed. The structure and working principle of the system were introduced, the factors affecting the measurement accuracy of the system were analyzed, and the influence of systematic error of the scanning system on the measurement accuracy was theoretically analyzed. The results show that the measurement error is 10-6 magnitude when the horizontal deviation is 0.29 mm perpendicular to the beam propagation direction. When the variation of cavity length is small, the rotation axis deviation can be compensated and the system can be fine adjusted by adjusting the ring-down cavity mirror. By fitting the data of light intensity and time, the corresponding first-order exponential function fitting curve was obtained, and the ring-down time as well as the reflectivity was obtained by calculation. Through contrast analysis, this kind of error analysis method can more effectively measure the reflectivity of cavity mirrors and can reduce the error brought by the experimental data itself.

In the evaluation and analysis of high-power laser system, the beam quality of laser is the decisive factor of the system beam quality and also an important index of acceptance and appraisal of laser, among which the beam divergence angle is an important parameter to identify the laser beam quality. The range of laser wavelength tested in this system is relatively wide, generally between 0.532 μm～10.6 μm, and no suitable detector can cover the whole band. Therefore, a new method was adopted to solve the measurement problem of wide-band beam divergence angle. The method of combining charge coupled device（CCD） imaging and scanning slit was used to measure the wide-band beam divergence angle. The CCD method was used to measure the laser beam divergence angle in visible and near-infrared band（0.532 μm～1.2 μm）, and the scanning slit method was used to measure the laser beam divergence angle in mid-infrared band（1.2 μm～10.6 μm）. The combination of the two methods can accurately measure the laser beam divergence angle in different wavebands.

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激光测距机的最大测程是激光测距机最主要的性能指标之一,是激光测距机有关性能参数的一种综合反映.简要介绍校准脉冲激光测距机最大测程的几种主要方法,并对各种方法的优、缺点进行详细分析.

给出光电在线检测系统对一种电子元件引线框架几何尺寸测试实例,验证光电在线检测系统进行测试的可行性,为提高该类产品的非接触实时在线测量提供一条新途径.

简要介绍国防科工委光学计量一级站在激光参数计量测试方面的技术现状,以及激光功率、激光能量、激光空域和时域参数计量测试标准的工作原理、技术指标和量传情况.

In this paper we describe an effective approach for obtaining the pulse temporal profile of ultra short laser pulses from a t raditional autocorrelation measurement.The extraction of the pulse shape does no t depend on additional spectral measurement or assumptions,which classify a form for the pulse.