Multi-rotation coherent imaging by a phase mask

作者：Geng, Yong; Wen, Xiu; Zhou, Xuyang; Li, Yutong; Tan, Jiubin; Ding, Weiqiang; Liu, Shutian; Liu, Zhengjun^*

来源：Optics and Lasers in Engineering, 2021, 139: 106511.

DOI：10.1016/j.optlaseng.2020.106511

• Coherent imaging
• Phase mask
• Rotation modulation

A high-efficiency coherent imaging system is designed by using phase modulation. After rotating a known phase mask, three images from rotation modulation are recorded and utilized to accurately reconstruct the complex-value sample. Specially, the system is free from rotation angle calculation, and requires fewer intensity measurements. This method has a superiority in convergence speed and calculation time. Furthermore, the optimal sample-to-sensor distance is searched by auto-focusing criteria. The proposed method is promising for compact biomedicine imaging and 3D measurement.

• 单位
  harbin inst technol