We present a novel phase imaging system based on a non-interferometric approach to obtain the complex amplitude of a wavefront. We sample the wavefront with a high-speed spatial light modulator. Then, a single lens forms a time-dependent light distribution on its focal plane, where a position detector is placed. This simple setup, with the aid of computational techniques, provides high spatial resolution, power efficiency, high dynamic range, and allows to work in spectral regions outside the VIS range. The validity of the technique is demonstrated by measuring both optical aberrations and phase distributions of transparent samples.
We present a phase imaging system using a novel non-interferometric approach. We overcome the limitations in spatial resolution, optical efficiency, and dynamic range that are found in Shack-Hartmann sensors. To do so, we sample the wavefront using a digital micromirror device. A single lens forms a time-dependent light distribution on its focal plane, where a position detector is placed. Our approach is lenslet-free and does not use any kind of iterative or unwrap algorithm to recover the phase information. The validity of our approach is demonstrated by performing both aberration sensing and phase imaging of transparent samples.
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