Geometric distortion correction for streak camera imaging

Geometric distortion correction for streak camera imaging
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条纹相机成像的几何畸变校正

DOI:
10.1117/1.jei.28.3.033023
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发表时间:
2019-06
影响因子:
1.1
通讯作者:
Guo Baoping
Guo Baoping
中科院分区:
计算机科学4区
文献类型:
--
作者:
Liu Ailin;Zhang Jinjin;Guo Baoping

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抽象的。由于条纹管成像是同心球面静电聚焦系统,径向放大倍数的相对变化会导致几何畸变。这降低了成像的空间分辨率。分析了改变电子光学成像系统径向放大倍率的物理原理,以校正成像系统的几何畸变,提高空间分辨率。使用球面光学系统的校准模型来校正畸变。比较校正前后掩模版强度图像的对比度,并计算最终分辨率。校正后对比度提高~4  %  ,最终分辨率提高~2  lp  /  mm。
Abstract. As streak tube imaging is a concentric spherical electrostatic focusing system, geometric distortion is caused by the relative change in radial magnification. This reduces the spatial resolution of imaging. The physical principle of changing the radial magnification of an electronic optical imaging system is analyzed to correct the geometric distortion of the imaging system and to improve spatial resolution. Distortion is corrected using the calibration model of a spherical optical system. The contrast of a reticle intensity image is compared before and after correction, and the ultimate resolution is calculated. Contrast is increased by ∼4  %  , and the ultimate resolution is increased by ∼2  lp  /  mm after correction.
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