Zhang Yong, Wang Ming, Jiang Ting, Wen Zhaoxin, Xiao Jiaxin, Luo Zhaoming
Key Laboratory of Hunan Province on Information Photonics and Freespace Optical Communications, School of Information Science and Engineering, Hunan Institute of Science and Technology , Yueyang 414006, China.
Biomed Opt Express. 2024 Aug 19;15(9):5349-5358. doi: 10.1364/BOE.531056. eCollection 2024 Sep 1.
Directional differential operation can extract the changes of directional information from complex signals, and plays an important role in target recognition and texture image processing. Here, we propose an optical directional differential operation based on large cross-polarization rotation, and realize the visual detection of chiral enantiomers. By using cross-polarization rotation in a specified direction, we design a corresponding directional spatial spectral transfer function whose transmission efficiency increases as the incident angle approaches the Brewster angle. The differential direction can be adjusted by changing the initial polarization state, and can be used to detect the concentration of chiral solutions. Finally, we apply the directional differential operation to achieve the visual detection of chiral enantiomers.
方向微分运算能够从复杂信号中提取方向信息的变化，在目标识别和纹理图像处理中发挥着重要作用。在此，我们提出一种基于大交叉偏振旋转的光学方向微分运算，并实现手性对映体的视觉检测。通过在特定方向上使用交叉偏振旋转，我们设计了一个相应的方向空间光谱传递函数，其传输效率随着入射角接近布儒斯特角而增加。微分方向可通过改变初始偏振态进行调整，并可用于检测手性溶液的浓度。最后，我们应用方向微分运算实现手性对映体的视觉检测。
