Imaging in Complex Media: Seeing Through the “fog” Without AI
Event Details
- Type
- Center for Studies in Physics and Biology Seminars
- Speaker(s)
-
Ori Katz, Ph.D., Professor, Hebrew University of Jerusalem
- Speaker bio(s)
-
Light scattering in complex media, such as biological tissue or fog, renders samples turbid or opaque, posing a fundamental challenge for conventional optical imaging. This limitation impacts diverse fields, ranging from deep-tissue microscopy to automotive sensing and astronomy [1,2]. However, because scattering is a deterministic process, these distortions are theoretically reversible, and it is in principle possible to find a correction and to recover a clear image. The primary challenge lies in determining and applying the specific complex correction in a practical, non-invasive manner. Recent works demonstrated that this is indeed practically achievable, enabling imaging through visually-opaque samples, flexible fibers, and even around corners. This is accomplished either by physically correcting the wavefronts using spatial light modulators (SLMs) [3], or through computational reconstruction [4-6]. I will review the principles and limitations of the state-of-the-art approaches for reversing random scattering. These methods leverage the inherent correlations of scattered “speckle” patterns, without relying on implanted guide-stars or training data. Specifically, I will detail how computational analysis of the scattering matrix yields the required correction wavefronts. If time permits I will also discuss strategies for tackling dynamic scattering [6].
- Open to
- Public
- Reception
- Refreshments, 3:30 p.m. - 4:00 p.m., Lower Level Greenberg Building (CRC)
- Phone
- (212) 327-8636
- Sponsor
-
Melanie Lee
(212) 327-8636
leem@rockefeller.edu