title: Retardance of bilayer anisotropic samples consisting of well-aligned cylindrical scatterers and birefringent media.
abstract: Both cylindrical scatterers and birefringent media may contribute to the anisotropy of tissue, where anisotropy can be characterized using polarization techniques. Our previous studies have shown that a layer of well-aligned cylindrical scatterers displays anisotropic properties similar to those of a piece of birefringent media, whose equivalent extraordinary axis is along the axial direction of the cylinders. We focused on a sample consisting of two layers of anisotropic media, with each layer having a different orientation; the characteristics of this sample were representative of the properties of multilayer fibrous tissues. Using a Mueller matrix decomposition method, we examined in detail how the total retardance and the equivalent extraordinary axis of the bilayered sample varied with changes in the retardance of the two layers and the direction of the extraordinary axis. The results of this study showed that, in such bilayer samples, a layer of well-aligned cylindrical scatterers generated a retardance that behaved exactly like the retardance generated by a piece of birefringent media. The simulated results were also confirmed by the results of experiments using aligned glass fibers.
authors.affiliation: Tsinghua University, Institute of Optical Imaging and Sensing, Graduate School at Shenzhen, Shenzhen Key Laboratory for Minimal Invasive Medical Technologies, 2279 Lishui Street, Shenzhen 518055, ChinabTsinghua University, Department of Physics, 1 Tsinghu.
authors.forename: Yihong
authors.initials: Y
authors.lastname: Guo
authors.affiliation: Tsinghua University, Institute of Optical Imaging and Sensing, Graduate School at Shenzhen, Shenzhen Key Laboratory for Minimal Invasive Medical Technologies, 2279 Lishui Street, Shenzhen 518055, China.
authors.forename: Nan
authors.initials: N
authors.lastname: Zeng
authors.affiliation: Tsinghua University, Institute of Optical Imaging and Sensing, Graduate School at Shenzhen, Shenzhen Key Laboratory for Minimal Invasive Medical Technologies, 2279 Lishui Street, Shenzhen 518055, China.
authors.forename: Honghui
authors.initials: H
authors.lastname: He
authors.affiliation: Tsinghua University, Institute of Optical Imaging and Sensing, Graduate School at Shenzhen, Shenzhen Key Laboratory for Minimal Invasive Medical Technologies, 2279 Lishui Street, Shenzhen 518055, ChinabTsinghua University, Department of Physics, 1 Tsinghu.
authors.forename: Celong
authors.initials: C
authors.lastname: Liu
authors.affiliation: Tsinghua University, Institute of Optical Imaging and Sensing, Graduate School at Shenzhen, Shenzhen Key Laboratory for Minimal Invasive Medical Technologies, 2279 Lishui Street, Shenzhen 518055, ChinabTsinghua University, Department of Physics, 1 Tsinghu.
authors.forename: E
authors.initials: E
authors.lastname: Du
authors.affiliation: Tsinghua University, Institute of Optical Imaging and Sensing, Graduate School at Shenzhen, Shenzhen Key Laboratory for Minimal Invasive Medical Technologies, 2279 Lishui Street, Shenzhen 518055, China.
authors.forename: Yonghong
authors.initials: Y
authors.lastname: He
authors.affiliation: Tsinghua University, Institute of Optical Imaging and Sensing, Graduate School at Shenzhen, Shenzhen Key Laboratory for Minimal Invasive Medical Technologies, 2279 Lishui Street, Shenzhen 518055, ChinabTsinghua University, Department of Physics, 1 Tsinghu.
authors.forename: Hui
authors.initials: H
authors.lastname: Ma
mesh_terms: D016880:Anisotropy; D001718:Birefringence; D003198:Computer Simulation; D005898:Glass / Q000737:chemistry; D009010:Monte Carlo Method
chemical_list: C009753:fiberglass