Super resolution ghost imaging based on Fourier spectrum acquisition

Abstract

In this paper, we propose a novel super-resolution ghost imaging based on Fourier spectrum acquisition. In the scheme, we use a set of sinusoidal speckle patterns with specific phase shift to illuminate the object, and then the corresponding total intensity of reflective light is measured by a bucket detector. By performing the inverse Fourier transformation on the bucket detection results, a set of low-resolution images with subpixel shift could be reconstructed. Subsequently, a super-resolution image could be obtained by combining all the reconstructed subpixel shifted images. The experimental results demonstrate that our proposed scheme can capture a super-resolution image with both direct and indirect line of sight to the object. The proposed scheme has the advantage of achieving super-resolution ghost imaging beyond the limitation of the pixel resolution of the illuminated speckle patterns and without the use of any high-precision motorized translation stages for shifting the speckle patterns.