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导出了考虑离轴、离焦、及弱相干时延匹配情况的光学相干层析三维传递函数．以此为基础分析了分辨率的各种影响因素，对系统设计及优化起到了指导作用．结论有：光谱带宽增大时，纵向分辨率将线性提高，其代价是信号幅度呈线性下降．对于离焦扫描，大的物镜焦距和小的通光口径虽会造成分辨率在绝对数量上的下降，但对于给定的扫描范围来说，其相对的离焦响应反而得以改善，即可在扫描动态范围内得到相对均匀的像质．还给出了实测弱相干波形及图像．
The three-dimensional optical transfer coherence tomography transfer function considering off-axis, out-of-focus, and weak coherent delay matching is derived. Based on this, various influencing factors of resolution were analyzed, which played a guiding role in system design and optimization. The conclusion is: As the spectral bandwidth increases, the vertical resolution increases linearly at the expense of a linear decrease in signal amplitude. For defocus scanning, a large objective focal length and a small clear aperture cause an absolute drop in resolution, but instead the relative defocus response is improved for a given scan range, Scanning dynamic range to get a relatively uniform quality. Also given the measured weak coherent waveforms and images.