像散对随机散射光的影响：倾斜透镜系统引入的像散与散斑发散k矢量之间的竞争
Contest between diverging k-vectors and astigmatism in an aberrated randomly scattered light
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中文总结 AI 辅助
研究像散对随机散射光影响，通过旋转透镜引入不同像散量，观察散斑强度相关函数形状变化，发现其与透镜倾斜角有关，源于散斑发散k矢量和像散的竞争，为成像系统设计提供帮助。
中文摘要 AI 辅助
本文通过研究不同像散量下散斑强度相关函数（ICF）形状的变化，探讨了像散对随机散射光（如由毛玻璃（GG）板产生的散斑）的影响。通过以不同角度旋转透镜引入不同量的像散，观察到反映散斑平均形状的ICF形状随透镜倾斜角（θ）的变化从圆形变为椭圆形，且ICF两轴长度随θ的变化性质完全不同。研究表明，这些不同性质源于散斑发散k矢量与倾斜透镜系统引入的像散之间的竞争。还发现发散k矢量会抵抗像散对散斑的影响，在特定θ之后，像散影响变得显著。通过进一步实验研究证实了像散斑图案中发散k矢量与像散之间的竞争并进行了详细讨论。该研究对设计散射光起重要作用的不同成像系统有帮助。
英文摘要
The impact of astigmatism on randomly scattered light, here speckles which are generated from a ground glass (GG) plate, is investigated by studying the change in the shape of the intensity correlation function (ICF) of the speckles for different amount of astigmatism introduced to it by rotating a lens at different angles. It is observed that the shape of the ICF, which reflects the average shape of the speckles, changes from circular to elliptical with the change of the tilt angle of the lens (theta), and the variation of length of two axes of the ICF with theta is completely different in nature. It is shown that these different natures are observed due to a contest between the diverging k-vectors of the speckles and the astigmatism introduced by the tilted lens system. It is also found that the diverging k-vectors resist the effect of astigmatism on the speckles, and after a certain theta, the impact of astigmatism becomes prominent. The contest between the diverging k-vectors and astigmatism in an aberrated speckle pattern are confirmed by further experimental studies and are discussed in detail. This study will surely be helpful in designing different imaging systems, where scattered light plays an important role.
