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为了解决在精确测量面源烟幕对小视场成像的干扰效能时,单束激光视场小、使用扫描方式时无法解决与烟幕扩散同步的问题,设计提出采用多个低功率的相同激光器,经过光束均匀化扩束整形排列形成激光器阵列,实现对烟幕透过率的空间探测,利用成像传感器测量烟幕的空间透过率的相对变化率。利用这种方法使用3×3均匀扩束激光光束阵列可以在113.4 m距离上实现面积为2.8 m×2.8 m的面源烟幕测量,成像CCD视场为10°×10°,灰度值小于230时的相对变化率误差不大于0.5%。
In order to solve the problem that the single-beam laser field is small and the synchronization with the smoke screen can not be solved when using the scanning mode to accurately measure the interference performance of the surface source smoke screen for the small field of view imaging, a plurality of low-power identical lasers are proposed, Homogenization expansion beam shaping array to form a laser array to achieve the detection of the smoke screen space, the use of imaging sensors to measure the relative rate of change of the smoke screen space transmittance. Using this method, a 3 × 3 uniform beam expander laser beam array can measure a surface smoke smoke measuring 2.8 m × 2.8 m at a distance of 113.4 m with an imaging CCD field of view of 10 ° × 10 ° and a grayscale value of less than 230 When the relative rate of change of error is not more than 0.5%.