The turbid nature of refractive index distribution within living tissues introduces severe aberrations to light propagation thereby severely compromising image reconstruction using currently available non-invasive techniques. Numerous approaches of endoscopy, based mainly on fibre bundles or GRIN-lenses, allow imaging within extended depths of turbid tissues, however their footprint causes profound mechanical damage to all overlying regions and their imaging performance is limited.
Progress in the domain of complex photonics enabled a new generation of minimally invasive, high-resolution endoscopes by substitution of the Fourier-based image relays with a holographic control of light propagating through apparently randomizing multimode optical waveguides. This form of endo-microscopy became recently a very attractive way to provide minimally invasive insight into hard-to-access locations within living objects.
Professor Čižmár will review our fundamental and technological progression in this domain and introduce several applications of this concept in bio-medically relevant environments.
AP 483 & AMO Seminar Series
4:15 pm, every Monday (Refreshments begin at 4 pm)
Spilker Building Room 232
Tomáš Čižmár is the head of the Fibre Research & Technology department of the Leibniz institute of Photonic Technology in Jena and leads the group of Complex Photonics at the Institute of Scientific Instruments in Brno. Although his scientific background is Physics, throughout his scientific career he took part in a variety of inter-disciplinary projects in Bio-Medical Photonics, mostly related to optical manipulation, digital holography, microscopy and cell biology. His recent research activities are focused on Photonics in random environments and highly turbid media such as biological tissues or multimode waveguides.