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Optics in the Life Sciences
We describe a coherent imaging technique that utilizes a diffraction grating placed near the object to alias high spatial frequency information through the imaging system pupil. The resulting optical field in the image plane is detected by means of digital holography. Multiple measurements are taken with the grating shifted by a fraction of its period between exposures. Linear signal processing is then used to separate the aliased spectral components, and Fourier techniques are applied todoi:10.1364/ntm.2011.nma3 fatcat:5g2vfdyy2na4djjsjfnz22vpxu