Howland Gregory A, Lum Daniel J, Howell John C
Opt Express. 2014 Aug 11;22(16):18870-80. doi: 10.1364/OE.22.018870.
We demonstrate a wavefront sensor that unites weak measurement and the compressive-sensing, single-pixel camera. Using a high-resolution spatial light modulator (SLM) as a variable waveplate, we weakly couple an optical field's transverse-position and polarization degrees of freedom. By placing random, binary patterns on the SLM, polarization serves as a meter for directly measuring random projections of the wavefront's real and imaginary components. Compressive-sensing optimization techniques can then recover the wavefront. We acquire high quality, 256 × 256 pixel images of the wavefront from only 10,000 projections. Photon-counting detectors give sub-picowatt sensitivity.
我们展示了一种将弱测量与压缩感知单像素相机相结合的波前传感器。通过使用高分辨率空间光调制器（SLM）作为可变波片，我们将光场的横向位置和偏振自由度进行弱耦合。通过在SLM上放置随机二进制图案，偏振可作为直接测量波前实部和虚部随机投影的测量工具。然后，压缩感知优化技术可以恢复波前。我们仅通过10000次投影就获得了高质量的256×256像素波前图像。光子计数探测器具有亚皮瓦灵敏度。
