Measurement and imaging of birefringent axis by phase resolved polarization sensitive optical coherence tomography

被引:0
作者
Hitzenberger, CK [1 ]
Götzinger, E [1 ]
Sticker, M [1 ]
Fercher, AF [1 ]
机构
[1] Univ Vienna, Inst Med Phys, A-1010 Vienna, Austria
来源
COHERENCE DOMAIN OPTICAL METHODS IN BIOMEDICAL SCIENCE AND CLINICAL APPLICATIONS VI | 2002年 / 4619卷
关键词
optical coherence tomography; polarization sensitive OCT; polarization; phase measurement;
D O I
10.1117/12.470473
中图分类号
R318 [生物医学工程];
学科分类号
0831 ;
摘要
We present a modified method of polarization sensitive optical coherence tomography (PS-OCT) that measures backscattered intensity, birefringence, and fast optic axis orientation with only one single A-scan per transverse measurement location. The technique employs a standard two-channel PS-OCT setup in combination with a phase sensitive recording of the interferometric signals in the two orthogonally polarized detection channels. We use a Hilbert transform based algorithm to extract amplitude and phase information contained in the interferometric signals. While the birefringence information is obtained from the signal amplitudes, as usual in PS-OCT, a careful analysis of the propagating beams by the Jones calculus reveals, that the information on the fast axis orientation is encoded entirely in the phase difference of the interferometric signals. We demonstrate our method and report on accuracy and precision of birefringence and fast axis measurements in a transparent technical object. Finally, we present PS-OCT maps of birefringence and of fast axis orientation recorded in scattering tissue.
引用
收藏
页码:120 / 127
页数:8
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