Tomioka Satoshi, Nishiyama Shusuke, Miyamoto Naoki, Kando Daichi, Heshmat Samia
Appl Opt. 2017 Aug 20;56(24):6755-6764. doi: 10.1364/AO.56.006755.
Interferometric tomography can reconstruct 3D refractive-index distributions through phase-shift measurements for different beam angles. To reconstruct a complex refractive-index distribution, many projections along different directions are required. For the purpose of increasing the number of the projections, we earlier proposed a beam-angle-controllable interferometer with mechanical stages; however, the quality of reconstructed distribution by conventional algorithms was poor because the background fringes cannot be precisely controlled. To improve the quality, we propose a weighted reconstruction algorithm that can consider projection errors. We demonstrate the validity of the weighted reconstruction through simulations and a reconstruction from experimental data for three candle flames.
干涉断层扫描可以通过对不同光束角度进行相移测量来重建三维折射率分布。为了重建复杂的折射率分布，需要沿不同方向进行许多投影。为了增加投影数量，我们之前提出了一种带有机械平台的光束角度可控干涉仪；然而，由于背景条纹无法精确控制，传统算法重建的分布质量较差。为了提高质量，我们提出了一种可以考虑投影误差的加权重建算法。我们通过模拟以及对三个蜡烛火焰的实验数据进行重建，证明了加权重建的有效性。
