通过真对数放大改善扫频源光学相干断层扫描的动态范围限制
Improvement in dynamic range limitation of swept source optical coherence tomography by true logarithmic amplification.
作者信息
Liu Bin, Azimi Ehsan, Brezinski Mark E
机构信息
Center for Optical Coherence Tomography and Optical Physics, Department of Orthopedic Surgery, Brigham and Women's Hospital, 75 Francis Street, Boston, Massachusetts 02115, USA.
出版信息
J Opt Soc Am A Opt Image Sci Vis. 2010 Mar 1;27(3):404-14. doi: 10.1364/JOSAA.27.000404.
Abstract
We previously demonstrated, with both theoretical and experimental studies, the dynamic range limitation with spectral domain optical coherence tomography (OCT) relative to time domain OCT. A significant portion of this limitation was due to the difference of analog/digital conversion. In this paper, a new method of true logarithmic amplification is discussed theoretically and tested experimentally to increase the dynamic range of a swept source OCT. With the current experimental setup, an increase of the dynamic range by about 6 dB was obtained.
摘要
我们之前通过理论和实验研究均证明，与时域光学相干断层扫描（OCT）相比，光谱域光学相干断层扫描存在动态范围限制。这种限制的很大一部分归因于模拟/数字转换的差异。本文从理论上讨论了一种新的真对数放大方法，并进行了实验测试，以提高扫频源光学相干断层扫描的动态范围。利用当前的实验装置，动态范围提高了约6分贝。
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