Lin Ling, Zhang Tae-Sok, Zheng Yu, Li Gang, Ren Zhao
State Key Laboratory of Precision Measurement Technology and Instruments, Tianjin University, Tianjin 300072, China.
Guang Pu Xue Yu Guang Pu Fen Xi. 2008 Sep;28(9):1962-7.
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.
为了提高光谱域光学相干断层扫描（SDOCT）的纵向分辨率和信噪比（SNR），开发了一种使用白光源的SDOCT。通过分析电荷耦合器件（CCD）水平方向上轴向像素总数、白光源光谱与纵向分辨率之间的关系，开发并介绍了一种基于部分光谱分析的白光源SDOCT（WSSDOCT）。在选择所需的合适白光源和检测带宽的情况下，在保证最大检测深度和高纵向分辨率的同时提高了信噪比。实验结果验证了光源相干长度、系统及图像纵向分辨率的测量方法，也证明了WSSDOCT的可行性。
