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SUMMARY:Imaging through optical fibres - Milana Gataric (University of Cam
 bridge)
DTSTART:20190621T123000Z
DTEND:20190621T132000Z
UID:TALK126322@talks.cam.ac.uk
CONTACT:INI IT
DESCRIPTION:In this talk\, I&#39\;ll present some recent results on recons
 truction of optical vector-fields using measurements acquired by an optica
 l fibre characterised by a non-unitary integral transform with an unknown 
 spatially-variant kernel. A new imaging framework will be introduced\, whi
 ch through regularisation is able to recover an optical vector-field with 
 respect to an arbitrary representation system potentially different from t
 he one used for fibre calibration. In particular\, this enables the recove
 ry of an optical vector-field with respect to a Fourier basis\, which is s
 hown to yield indicative features of increased scattering associated with 
 tissue abnormalities. The effectiveness of this framework is demonstrated 
 using biological tissue samples in an experimental setting where measureme
 nts are acquired by a fibre endoscope\, and it is observed that indeed the
  recovered Fourier coefficients are useful in distinguishing healthy tissu
 es from lesions in early stages of cancer. If time permits\, I&#39\;ll als
 o briefly present a new method that enables recovery of non-unitary fibre 
 transmission matrices necessary for minimally invasive optical imaging in 
 inaccessible areas of the body.
LOCATION:Seminar Room 1\, Newton Institute
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