Lensless Fourier-Transform Ghost Imaging with Classical Incoherent Light
  The Fourier-Transform ghost imaging of both amplitude-only and pure-phase objects was experimentally observed with classical incoherent light at Fresnel distance by a new lensless scheme. The experimental results are in good agreement with the standard Fourier-transform of the corresponding objects. This scheme provides a new route towards aberration-free diffraction-limited 3D images with classically incoherent thermal light, which have no resolution and depth-of-field limitations of lens-based tomographic systems. 
Minghui Zhang, Qing Wei, Xia Shen, Yongfeng Liu, Honglin Liu, Jing   Cheng, Shensheng Han