论文标题
空间多路复用介电张量断层扫描
Spatially multiplexed dielectric tensor tomography
论文作者
论文摘要
介电张量断层扫描（DTT）实现了三维（3D）介电张量的重建，这提供了3D光学各向异性的物理量度。在此，我们提出了一种使用多重方法进行DTT测量的成本效益且可靠的方法。通过在离轴干涉仪中利用具有不同角度的两个正交极化的参考光束，使用单个摄像机重叠并记录两个极化敏感的干涉图。然后，将两个多路复用的干涉图在傅立叶域中分离，从而使对极化敏感场的重建。最后，通过测量各种照明角度的极化敏感场，重建了3D介电张量断层图。通过重建具有径向和双极定向构型的各种液晶颗粒的3D介电张量来实验证明所提出的方法。
Dielectric tensor tomography (DTT) enables the reconstruction of three-dimensional (3D) dielectric tensors, which provides a physical measure of 3D optical anisotropy. Herein, we present a cost-effective and robust method for DTT measurement using a multiplexing approach. By exploiting two orthogonally polarized reference beams with different angles in an off-axis interferometer, two polarization-sensitive interferograms were overlapped and recorded using a single camera. Then, the two multiplexed interferograms were separated in the Fourier domain, enabling the reconstruction of polarization-sensitive fields. Finally, by measuring the polarization-sensitive fields for various illumination angles, 3D dielectric tensor tomograms were reconstructed. The proposed method was experimentally demonstrated by reconstructing the 3D dielectric tensors of various liquid crystal particles with radial and bipolar orientational configurations.
