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Coherent synthetic aperture imaging for visible remote sensing via reflective Fourier ptychography

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Document pages: 5 pages

Abstract: Synthetic aperture radar (SAR) can measure the phase with antenna andmicrowave, which cannot be directly extended to visible light imaging due tophase lost. In this letter, we reported an active remote sensing with visiblelight via reflective Fourier ptychography (FP), termed coherent syntheticaperture imaging (CSAI), achieving high resolution, wide field-of-view (FOV)and phase recovery. A proof-of-concept experiment was reported with laserscanning and a collimator for the infinite object. Both smooth and roughobjects are tested, and the spatial resolution increased from 15.6 um to 3.48um with a factor of 4.5. The speckle noise can be suppressed by FPunexpectedly. Meanwhile, the CSAI method may replace the adaptive optics totackle the aberration induced from atmospheric turbulence and optical system byone-step deconvolution.

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