Park B Hyle, Pierce Mark C, Cense Barry, de Boer Johannes F
Wellman Center for Photomedicine, Massachusetts General Hospital, Harvard Medical School, 50 Blossom Street, BAR 7, Boston, Massachusetts 02114, USA.
Opt Lett. 2005 Oct 1;30(19):2587-9. doi: 10.1364/ol.30.002587.
We present a generalized analysis of fiber-based polarization-sensitive optical coherence tomography with an emphasis on determination of sample optic axis orientation. The polarization properties of a fiber-based system can cause an overall rotation in a Poincaré sphere representation such that the plane of possible measured sample optic axes for linear birefringence and diattenuation no longer lies in the QU-plane. The optic axis orientation can be recovered as an angle on this rotated plane, subject to an offset and overall indeterminacy in sign such that only the magnitude, but not the direction, of a change in orientation can be determined. We discuss the accuracy of optic axis determination due to a fundamental limit on the accuracy with which a polarization state can be determined as a function of signal-to-noise ratio.
我们对基于光纤的偏振敏感光学相干断层扫描进行了广义分析，重点在于确定样品光轴方向。基于光纤的系统的偏振特性会导致庞加莱球表示中的整体旋转，使得线性双折射和二向色性的可能测量样品光轴平面不再位于QU平面。光轴方向可以作为该旋转平面上的一个角度恢复，但存在偏移和符号上的整体不确定性，因此只能确定方向变化的大小，而不能确定方向。我们讨论了由于偏振态作为信噪比函数的确定精度存在基本限制而导致的光轴确定精度问题。
