Resonant scanning design and control for fast spatial sampling

Abstract Two-dimensional, resonant scanners have been utilized in a large variety of imaging modules due to their compact form, low power consumption, large angular range, and high speed. However, resonant scanners have problems with non-optimal and inflexible scanning patterns and inherent phase un...

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Autores principales:	Zhanghao Sun, Ronald Quan, Olav Solgaard
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/3e5340af44e84da2afefe4dcc5bac872
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spelling	oai:doaj.org-article:3e5340af44e84da2afefe4dcc5bac8722021-12-02T18:09:03ZResonant scanning design and control for fast spatial sampling10.1038/s41598-021-99373-y2045-2322https://doaj.org/article/3e5340af44e84da2afefe4dcc5bac8722021-10-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-99373-yhttps://doaj.org/toc/2045-2322Abstract Two-dimensional, resonant scanners have been utilized in a large variety of imaging modules due to their compact form, low power consumption, large angular range, and high speed. However, resonant scanners have problems with non-optimal and inflexible scanning patterns and inherent phase uncertainty, which limit practical applications. Here we propose methods for optimized design and control of the scanning trajectory of two-dimensional resonant scanners under various physical constraints, including high frame-rate and limited actuation amplitude. First, we propose an analytical design rule for uniform spatial sampling. We demonstrate theoretically and experimentally that by expanding the design space, the proposed designs outperform previous designs in terms of scanning range and fill factor. Second, we show that we can create flexible scanning patterns that allow focusing on user-defined Regions-of-Interest (RoI) by modulation of the scanning parameters. The scanning parameters are found by an optimization algorithm. In simulations, we demonstrate the benefits of these designs with standard metrics and higher-level computer vision tasks (LiDAR odometry and 3D object detection). Finally, we experimentally implement and verify both unmodulated and modulated scanning modes using a two-dimensional, resonant MEMS scanner. Central to the implementations is high bandwidth monitoring of the phase of the angular scans in both dimensions. This task is carried out with a position-sensitive photodetector combined with high-bandwidth electronics, enabling fast spatial sampling at $$\sim 100$$ ∼ 100 Hz frame-rate.Zhanghao SunRonald QuanOlav SolgaardNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-10 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Zhanghao Sun Ronald Quan Olav Solgaard Resonant scanning design and control for fast spatial sampling
description	Abstract Two-dimensional, resonant scanners have been utilized in a large variety of imaging modules due to their compact form, low power consumption, large angular range, and high speed. However, resonant scanners have problems with non-optimal and inflexible scanning patterns and inherent phase uncertainty, which limit practical applications. Here we propose methods for optimized design and control of the scanning trajectory of two-dimensional resonant scanners under various physical constraints, including high frame-rate and limited actuation amplitude. First, we propose an analytical design rule for uniform spatial sampling. We demonstrate theoretically and experimentally that by expanding the design space, the proposed designs outperform previous designs in terms of scanning range and fill factor. Second, we show that we can create flexible scanning patterns that allow focusing on user-defined Regions-of-Interest (RoI) by modulation of the scanning parameters. The scanning parameters are found by an optimization algorithm. In simulations, we demonstrate the benefits of these designs with standard metrics and higher-level computer vision tasks (LiDAR odometry and 3D object detection). Finally, we experimentally implement and verify both unmodulated and modulated scanning modes using a two-dimensional, resonant MEMS scanner. Central to the implementations is high bandwidth monitoring of the phase of the angular scans in both dimensions. This task is carried out with a position-sensitive photodetector combined with high-bandwidth electronics, enabling fast spatial sampling at $$\sim 100$$ ∼ 100 Hz frame-rate.
format	article
author	Zhanghao Sun Ronald Quan Olav Solgaard
author_facet	Zhanghao Sun Ronald Quan Olav Solgaard
author_sort	Zhanghao Sun
title	Resonant scanning design and control for fast spatial sampling
title_short	Resonant scanning design and control for fast spatial sampling
title_full	Resonant scanning design and control for fast spatial sampling
title_fullStr	Resonant scanning design and control for fast spatial sampling
title_full_unstemmed	Resonant scanning design and control for fast spatial sampling
title_sort	resonant scanning design and control for fast spatial sampling
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/3e5340af44e84da2afefe4dcc5bac872
work_keys_str_mv	AT zhanghaosun resonantscanningdesignandcontrolforfastspatialsampling AT ronaldquan resonantscanningdesignandcontrolforfastspatialsampling AT olavsolgaard resonantscanningdesignandcontrolforfastspatialsampling
_version_	1718378621426466816

Resonant scanning design and control for fast spatial sampling

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