Wavefront sensing: megapixel resolution Wavefront sensing with greatly improved spatial resolution is now possible thanks to a new approach. The scheme, invented by Yicheng Wu and coworkers at Rice University in the US uses a spatial light modulator (SLM), a CMOS image sensor and a computational phase-retrieval algorithm. The optical field to be analyzed is modulated by a series of random phase patterns generated by the SLM and a series of corresponding spatial intensity measurements are made on the CMOS sensor. The data is then processed by a phase-retrieval algorithm in order to generate the phase and amplitude information of the wavefront incident on the SLM. Importantly, the team says that the scheme can provide wavefront reconstruction with a ~10-megapixel resolution, several orders of magnitude better than commercial Shack-Hartmann sensors.

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shackhartmann sensors random phase patterns cmos image sensor spatial intensity measurements 10megapixel resolution optical field computational phaseretrieval phase and amplitude information of the wavefront spatial light modulator sensing megapixel resolution wavefront sensing wavefront reconstruction scheme slm

Yicheng Wu,Manoj Kumar Sharma,Ashok Veeraraghavan,.WISH: wavefront imaging sensor with high resolution. 8 (1),.

Yicheng Wu,Manoj Kumar Sharma,Ashok Veeraraghavan,"WISH: wavefront imaging sensor with high resolution" 8

Yicheng Wu,Manoj Kumar Sharma,Ashok Veeraraghavan,"WISH: wavefront imaging sensor with high resolution"