Digital crossed-beam holography for in situ imaging of atmospheric ice particles
Digital crossed-beam holography for in situ imaging of atmospheric ice particles
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DOI：
10.1088/1464-4258/8/9/014
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发表时间：
2006-07
影响因子：
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通讯作者：
S. Raupach;H. Vössing;J. Curtius;S. Borrmann
中科院分区：
文献类型：
--
作者：
S. Raupach;H. Vössing;J. Curtius;S. Borrmann
描述了一种基于地面的户外数字全息粒子成像系统，该系统使用纳秒脉冲激光器和CMOS相机在线设置来原位成像大气粒子。清晰的图像可以从衍射图像数字重建。该系统使用两个交叉的光束路径，产生的总样品体积约为9.9立方厘米，其中可以成像空间范围与光束路径正交的粒子，其空间范围在10微米到几毫米之间。该设置允许在约0.3立方厘米的大气交叉体积内的物体的两个视图，由相交的光束定义。它演示了如何可以用于准确确定的三维距离关系内的交叉体积，除了确定移动的空气中的颗粒的大小和形状。为此，在阿尔卑斯山的高海拔研究站少女峰的现场测试的结果显示为例。
A ground-based outdoor digital-holographic particle imaging system is described, which uses a nanosecond pulsed laser and CMOS cameras in an inline set-up to image atmospheric particles in situ. Sharp images can be digitally reconstructed from the diffraction images. The system uses two crossed beam paths, yielding a total sample volume of roughly 9.9 cm3 where particles with a spatial extent orthogonal to the beam path between 10 µm and several millimetres can be imaged. The set-up allows for two views of objects within an atmospheric cross volume of about 0.3 cm3, defined by the intersecting beams. It is demonstrated how this can be used for an accurate determination of three-dimensional distance relationships within the cross volume, in addition to determining sizes and shapes of moving airborne particles. To this end, results from a field test on the High Altitude Research Station Jungfraujoch in the Alps are shown as examples.