Optics Seminar: Imaging in 3D and other fun things to do through multimode fibres

Date

2025年2月3日 (月) 16:00 17:30

Location

C209, Centre Building

Description

Title:  Imaging in 3D and other fun things to do through multimode fibres

Speaker: Dr Peter Mekhail, University of Glasgow, Scottland

Abstract:
We demonstrated live point-scanning reflection imaging through a hair-thin multimode fibre by using high-speed spatial light modulation. We have used this technique in 3D imaging with time-of-flight measurements from a Q-switched pulsed laser source. We have also explored live imaging with a hand-held version of the endoscope, using a calibration library to guide the process where the selection of the calibration positions were based on speckle correlations from fibres bent into various configurations. Additionally, we investigated the use of auto-encoding neural networks to improve image reconstruction as the fibre undergoes bending, for robust, real-time imaging in flexible settings. Finally, we extended the capabilities of multimode fibres by demonstrating sound recording through the fibre, using phase measurements obtained via high-speed light field reconstruction. This work underscores the versatility and potential of multimode fibres in advanced imaging and sensing applications.

Related papers:
Time-of-flight 3D imaging through multimode optical fibers
Single multimode fibre for in vivo light-field-encoded endoscopic imaging
Seeing through chaos in multimode fibres
Robust real-time imaging through flexible multimode fibers

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