Development of 20 kHz swept source optical coherence tomography system

被引：3
|
作者：
Wu, Tong [1 ]
Ding, Zhihua [1 ]
机构：
[1] State Key Laboratory of Modern Optical Instrumentation, Zhejiang University
来源：
Zhongguo Jiguang/Chinese Journal of Lasers | 2009年 / 36卷 / 02期
关键词：
Medical optics and biotechnology; Optical coherence tomography; Resolution; Swept source; Wave number caliberation;
D O I：
10.3788/CJL20093602.0503
中图分类号：
学科分类号：
摘要：
The self-developed swept source optical coherence tomography (SS-OCT) system is reported. Based on a high speed scanning laser source, the system realizes high speed A-scan rate of 20 kHz from 500 Hz A-scan rate of time-domain OCT. To realize linear calibration of wave number space, a pre-calibration method based on the SS-OCT system is used. Because of the non-Gaussian spectrum output of the swept source, a method based on window function is used for spectrum reshaping in the spectrum domain. To eliminate the direct current(DC) and auto-correlation term in the interference spectrum, the common-rejection of balanced detection, and a software method of subtract the mean value were used. The axial and lateral resolution of the SS-OCT system achieves 14 μm and 12 μm, respectively. The ranging depth of the SS-OCT achieves 3.9 mm. High speed optical coherence tomography images of finger-pad organism using the SS-OCT system were obtained.
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页码：503 / 508
页数：5
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