Myopic deblurring of space-variant blur by using phase-diverse speckle

Space-variant blur occurs when imaging through volume turbulence over sufficiently large fields of view. This condition arises in a variety of imaging geometries, including astronomical imaging, horizontal-path imaging, and slant-path (e.g., air-to-ground) imaging. Space-variant effects are particularly severe when much of the optical path is immersed in turbulent media. Phase-diverse speckle (PDS), an imaging modality that blends the strengths of phase diversity and speckle imaging, can be used to sense the space-variant blur from image data and recover fine-resolution images. Technically, PDS does not perform blind deblurring because it utilizes auxiliary data provided by the diversity channel. The function performed by PDS is more appropriately referred to as myopic deblurring. We present results demonstrating the recovery of fine-resolution features from both simulated and real data exhibiting space-variant blur.