DMD as a pseudo-pixel array for long-range high-speed LIDAR

Paul Hawthorne; Mark W. McDonald; Ian S. Park; Duncan P. Hand

doi:10.1117/12.3013439

5 June 2024 DMD as a pseudo-pixel array for long-range high-speed LIDAR

Paul Hawthorne, Mark W. McDonald, Ian S. Park, Duncan P. Hand

Proceedings Volume 13049, Laser Radar Technology and Applications XXIX; 130490L (2024) https://doi.org/10.1117/12.3013439
Event: SPIE Defense + Commercial Sensing, 2024, National Harbor, Maryland, United States

Abstract

Long-range, high-speed, free-space LIDAR systems face challenges from ambient background noise. Maximizing the signal-to-noise ratio (SNR) is vital for extending the range and increasing the scanning speed. One effective strategy in steered LIDAR systems is using field-of-view (FOV) filtering to retain signals and suppress noise. Pixel-based approaches with sensitive detector arrays are costly, especially at near-infrared wavelengths. This work employs a digital micromirror device (DMD) as a pseudo-pixel array. It redirects signal light to a single-pixel detector while routing noise light to a beam dump. This work explores a simple experimental setup to explore the DMD’s range improvement potential. Ambient noise rejections ratios greater than 20 were exhibited using a 6×6 pseudo-pixel array on the DMD, resulting in a 2.88 fold range improvement in a theoretical LIDAR system. This approach thus offers a means of enhancing long-range, high-speed, free-space LIDAR systems.

Conference Presentation

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Paul Hawthorne, Mark W. McDonald, Ian S. Park, and Duncan P. Hand "DMD as a pseudo-pixel array for long-range high-speed LIDAR", Proc. SPIE 13049, Laser Radar Technology and Applications XXIX, 130490L (5 June 2024); https://doi.org/10.1117/12.3013439

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