基于子谱分析的白光频域OCT

为了提高频域OCT系统轴向分辨率和信噪比，提出了一种采用白光光源的频域OCT系统，研究了所用的CCD相机的横向像素数、白光光源的光谱与系统轴向分辨率之间的关系，建立了一种基于子谱分析的白光频域OCT系统。通过选择所需的白光光源及其接收频段，既能保证最大探测深度和高轴向分辨率，又能提高信噪比。实验结果验证了所提出的光源的相干长度和系统及图像轴向分辨率测量方法，证明了白光频域OCT的可行性。

White-Light Source Spectral Domain OCT Based on Partial Spectrum Analysis

In order to enhance the longitudinal resolution and the signal to noise ratio (SNR) of spectral domain OCT(SDOCT), a SDOCT using white light source was developed. By analyzing the relationship among axial total number of pixels in the horizontal direction of CCD, the spectrum of white-light source and longitudinal resolution, a white-light source SDOCT(WSSDOCT) based on partial spectrum analysis was developed and introduced. With proper white light source required and band width for detection selected, the SNR was improved with maximum detecting depth and high longitudinal resolution guaranteed. Experimental results validate the measurement method for the coherence length of the light source, and system & image longitudinal resolution, and also testify the feasibility of WSSDOCT.