基于离焦型夏克-哈特曼传感器的定量相位成像技术

Quantitative Phase Imaging Based on Defocused Shack-Hartmann Sensor

提出了一种基于离焦型夏克-哈特曼传感器的定量相位成像技术。该技术利用离焦型夏克-哈特曼波前传感器记录两种不同波长的光的照射下的强度分布图,采用双波长相位恢复算法进行相位恢复,获得了透过相位物体的数字光场,实现了纯相位物体成像。数值模拟结果表明该定量相位成像技术方法简单、精度高、收敛速度快,是一种非常具有潜力的定量相位成像技术。

In this paper,an approach using a defocused Shack-Hartmann sensor for quantitative phase imaging(QPI)is proposed.In this technology,the defocused Shack-Hartmann wavefront sensor is used to record the intensity distribution under the illumination of light with two different wavelengths,and the dual wavelength phase retrieval algorithm is used for phase retrieval.The digital light field through the phase object is obtained,and the imaging of pure phase objects is realized.Numerical simulation results show that the QPI method is simple and with high accuracy and fast convergence,which is a very promising QPI technology.