Incoherent speckle imaging at the anisoplanatic limit
Prof. Jeremy Bos
Associate Professor, Electrical and Computer Engineering
Image or scene recovery at low signal levels and poor seeing presents a challenge for most adaptive optics systems. The problem is compounded when imaging man-made space objects in low orbits. Here, the turbulence changes quickly preventing loop-closure. When imaging over long horizontal paths in the atmosphere the problem is made worse: the isoplanatic angle can often be on the order of the diffraction limit. Incoherent speckle imaging is a post-processing technique that can often provide near diffraction-limited images in scene recovery tasks. In this talk, I will provide an overview of incoherent speckle imaging, why and where it is effective in the isoplanatic case and speculate on its effectiveness in “extreme anisoplanatism”. Part of this explanation involves the concept of “aperture partition” found to be useful in daylight imaging of space objects when the ratio of aperture size to the Fried coherence cell is large. Similarly, I reason that light-field approaches that exploit angular diversity may allow for joint estimation of the scene and volume turbulence. Potentially, this approach may allow for snapshot scene recovery and volume turbulence estimates.
Bio: Jeremy Bos is an associate professor of Electrical and Computer Engineering at Michigan Technological University. Before joining the faculty at Michigan Tech in 2015 Bos was a NRC Postdoctoral Fellow working with the Air Force Research Laboratory’s Maui Space Surveillance Complex. Bos earned his PhD in 2012 and BS in 2000 from Michigan Tech and his MS from Villanova University in 2003. He is a licensed professional in Michigan and has over 10 years of experience in the automotive and defense industries. In 2017 he was selected for the AFOSR Young Investigator Program, he has graduated five PhD students and is a contributing author on over 90 scholarly works including seven patents. Jeremy is also a senior member of IEEE, SPIE, and Optica. In addition to atmospheric optics, Bos maintains active research interests in the area of robust autonomous systems and advises Michigan Tech’s AutoDrive challenge team.
Hosted by Prof. Crepp