Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Time of flight 3D imaging through multimode optical fibres   Time-of-flight (ToF) 3D imaging has a wealth of applications, from industrial
inspection to movement tracking and gesture recognition. Depth information is
recovered by measuring the round-trip flight time of laser pulses, which
usually requires projection and collection optics with diameters of several
centimetres. In this work we shrink this requirement by two orders of
magnitude, and demonstrate near video-rate 3D imaging through multimode optical
fibres (MMFs) - the width of a strand of human hair. Unlike conventional
imaging systems, MMFs exhibit exceptionally complex light transport resembling
that of a highly scattering medium. To overcome this complication, we implement
high-speed aberration correction using wavefront shaping synchronised with a
pulsed laser source, enabling random-access scanning of the scene at a rate of
$\sim$23,000 points per second. Using non-ballistic light we image moving
objects several metres beyond the end of a $\sim$40 cm long MMF of 50$\mu$m
core diameter, with millimetric depth resolution, at frame-rates of $\sim$5Hz.
Our work extends far-field depth resolving capabilities to ultra-thin
micro-endoscopes, and will have a broad range of applications to clinical and
remote inspection scenarios.

26
The categories of this paper are: bayes-an
35
The categories of this paper are: mtrl-th
8
The categories of this paper are: hep-ex
5
The categories of this paper are: gr-qc
4
The categories of this paper are: cond-mat
19
The categories of this paper are: eess
11
The categories of this paper are: hep-lat
23
The categories of this paper are: solv-int
33
The categories of this paper are: plasm-ph
31
The categories of this paper are: ao-sci
16
The categories of this paper are: stat
28
The categories of this paper are: alg-geom
17
The categories of this paper are: q-fin
1
The categories of this paper are: cs
25
The categories of this paper are: patt-sol
7
The categories of this paper are: hep-th