光學希爾伯特偵測法應用於頻域光學同調斷層攝影術 以消除直流項,鏡像和自相關項

Eliminating DC terms, mirror terms and autocorrelation terms on spectral domain optical coherence tomography by optical Hilbert detection method

劉子豪

指導教授 ： 郭文娟 教授

國立臺灣師範大學/理學院/光電科技研究所/碩士(2011年)

摘要

光學同調斷層掃瞄技術(Optical Coherence Tomography；OCT)是近年來發展相當蓬勃的光學量測技術。它以非接觸、非破壞式的檢測方法，提供了快速且高解析度，物體內部結構的檢測。頻域光學同調斷層掃瞄技術(Spectral Domain Optical Coherence Tomography；SD-OCT)是一種新穎的OCT技術，減少了光學系統偵測端的架設，以及利用干涉光譜的分析，使量測的敏感度以及量測的速度大幅度的提升，可以在生物活體上做即時的影像量測，獲得物體內部結構的資訊。此篇論文中，我們提出一種新的頻域光學同調斷層掃瞄技術建構於單一光譜儀。兩道正交極化光同時垂直入射相機的接收端且兩道不同高度的入射光可以被分開，這樣的系統可以避免並消除直流項、自相關項和鏡像。最後討論因為光譜扭曲需要做額外的後處理，以及蓋玻片樣品和雙折射樣品量測。

關鍵字

頻域光學同調斷層掃瞄技術

並列摘要

Optical coherent tomography (OCT) is a vigorous development technology in recent
optical measurement methods. It is a non-contact, non-destructive testing method
which provides a fast and high-resolution detection of internal structure of objects. Spectral Domain Optical Coherence Tomography (SD-OCT) is a new OCT technology which can reduce the detection side optical system set up. It uses interference spectroscopy analysis to increase the measurement sensitivity and the speed, thus in vivo biological imaging measurements can be done in real time.
In this thesis, we propose a novel SD-OCT setup based on a single camera spectrometer. Two orthogonally polarized beams could be separately taken by two lines of the camera as a result of vertically different incident height. The system could provide the imaging capabilities of elimination the inherent DC term, autocorrelation noise, and the mirror image in SD-OCT. We discuss the additional post-processing required to accommodate for spectral distortions, show calibration measurements in a test sample, and finally demonstrate the system for measuring birefringence phantom

並列關鍵字

Spectral Domain Optical Coherence Tomography

參考文獻

[1] M. Wojtkowski and A. Kowalczyk, R. Leitgeb and A. F. Fercher, Full range complex spectral optical coherence tomography technique in eye imaging,August 15, 2002,Vol. 27, No. 16,OPTICS LETTERS

[2] Erich Götzinger, Michael Pircher, Rainer A. Leitgeb,and Christoph K. Hitzenberger, High speed full range complex spectral domain optical coherence tomography, 24 January 2005,Vol. 13, No. 2, OPTICS EXPRESS

[3] Kye-Sung Lee, Panomsak Meemon, William Dallas, Kevin Hsu, and Jannick P. Rolland, Dual detection full range frequency domain optical coherence tomography, OPTICS LETTERS,Vol. 35, No. 7,April 1, 2010

[4] Hsu-Chih Cheng a, Jen-Fa Huang b,c,d, Yi-Hua Hsieh b,c,d, Numerical analysis of one-shot full-range FD-OCT system based on orthogonally polarized light, Optics Communications 282 (2009) 3040–3045

[5] Bernhard Baumann, Erich Götzinger, Michael Pircher, and Christoph K. Hitzenberger, Single camera based spectral domain polarization sensitive optical coherence tomography, 5 February 2007,Vol. 15, No. 3,OPTICS EXPRESS