Real-time wide-field spectral-scanning FMCW coherent 3D imaging and velocimetry

Jingkai Zhang; Ruobing Qian; Kevin C. Zhou; Christian Viehland; Mark Draelos; Al-Hafeez Dhalla; Joseph A. Izatt; Joseph A. Izatt

doi:10.1364/OL.463965

Optics Letters
Vol. 47,
Issue 16,
pp. 4064-4067
(2022)
•https://doi.org/10.1364/OL.463965

Real-time wide-field spectral-scanning FMCW coherent 3D imaging and velocimetry

Jingkai Zhang, Ruobing Qian, Kevin C. Zhou, Christian Viehland, Mark Draelos, Al-Hafeez Dhalla, and Joseph A. Izatt

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Jingkai Zhang, Ruobing Qian, Kevin C. Zhou, Christian Viehland, Mark Draelos, Al-Hafeez Dhalla, and Joseph A. Izatt, "Real-time wide-field spectral-scanning FMCW coherent 3D imaging and velocimetry," Opt. Lett. 47, 4064-4067 (2022)

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Table of Contents Category
- Imaging Systems
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About this Article
History
- Original Manuscript: May 25, 2022
- Revised Manuscript: July 16, 2022
- Manuscript Accepted: July 20, 2022
- Published: August 5, 2022

Abstract

We present a real-time spectral-scanning frequency-modulated continuous wave (FMCW) 3D imaging and velocimetry system that can produce 3D depth maps at 33 Hz, with 48° × 68° field of view (FOV) and 32.8-cm depth range. Each depth map consists of 507 × 500 pixels, with 0.095° × 0.14° angular resolution and 2.82-mm depth resolution. The system employs a grating for beam steering and a telescope for angular FOV magnification. Quantitative depth, reflectivity, and axial velocity measurements of a static 3D printed depth variation target and a moving robotic arm are demonstrated.

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Supplementary Material (3)

Name	Description
Visualization 1	A 33-fps depth map video of the robot arm making a complex movement.
Visualization 2	A 33-fps reflectivity map video of the robot arm making a complex movement.
Visualization 3	A 33-fps axial velocity map video of the robot arm end effector constrained to move axially towards the FMCW system at a speed of 20 mm/s.

Data availability

Data underlying the results presented in this paper are available from the authors upon reasonable request.

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