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PhD Thesis Defense

Wednesday, September 2, 2020
4:00pm to 5:00pm
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Online Event
Optical light manipulation and imaging through scattering media
Jian Xu, Graduate Student, Electrical Engineering, California Institute of Technology,

Over the years, optical systems are designed for free space or clean media. As optical systems get widely applied in different areas, there exist many conditions where the free space or clean media conditions do not hold, due to the presence of scattering media. For instance, when we aim to do deep tissue imaging for biomedical research, the surface tissue is a type of scattering medium that scrambles the optical wavefront. In this talk, I will discuss two types of methods that are recently deployed to address of the scattering problem in optics. One method is active control, where active optical components, such as spatial light modulators (SLM), are introduced into the optical systems to compensate the scattering. The other method is passive computation, where physical and mathematical models are built to describe the scattering media, and the scattering problem is solved by computational approaches. By using the two sets of methods, we can realize coherent and incoherent light field manipulation through scattering media, biomedical sensing and imaging, and other applications that are difficult to achieve by conventional optical systems.

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For more information, please contact Tanya Owen by email at [email protected].