Biaxial 360-degree scanning LIDAR using a liquid crystal control

Abstract Sophisticated non-mechanical technology for LIDARs is needed to realize safe autonomous cars. We have confirmed the operating principle of a non-mechanical LIDAR by combining concentric circular-grating couplers (CGCs) with a coaxially aligned rod lens. Laser light incident vertically on th...

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Autor principal:	Seiji Nishiwaki
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/d80d9c4bb83d45b9ad5bb66e0feee40d
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spelling	oai:doaj.org-article:d80d9c4bb83d45b9ad5bb66e0feee40d2021-12-02T16:26:38ZBiaxial 360-degree scanning LIDAR using a liquid crystal control10.1038/s41598-021-94208-22045-2322https://doaj.org/article/d80d9c4bb83d45b9ad5bb66e0feee40d2021-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-94208-2https://doaj.org/toc/2045-2322Abstract Sophisticated non-mechanical technology for LIDARs is needed to realize safe autonomous cars. We have confirmed the operating principle of a non-mechanical LIDAR by combining concentric circular-grating couplers (CGCs) with a coaxially aligned rod lens. Laser light incident vertically on the center of the inner CGC along the center axis of the lens is radiated from the outer CGC and passes through the side surface of the lens. It is converted to a parallel beam that scans in two axes by applying voltages to two area-segmented electrode layers sandwiching the CGCs and a liquid crystal layer formed on the CGCs. We have demonstrated scanning whose motion ranges were 360 degrees horizontally and 10° vertically. A beam with a spread angle of 0.3° × 0.8° at a minimum swept vertically up to a frequency of 100 Hz and ten equally spaced beams scanned rotationally with a 6-degree cycle variation of spread of between 0.8° and 3.5°.Seiji NishiwakiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-13 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Seiji Nishiwaki Biaxial 360-degree scanning LIDAR using a liquid crystal control
description	Abstract Sophisticated non-mechanical technology for LIDARs is needed to realize safe autonomous cars. We have confirmed the operating principle of a non-mechanical LIDAR by combining concentric circular-grating couplers (CGCs) with a coaxially aligned rod lens. Laser light incident vertically on the center of the inner CGC along the center axis of the lens is radiated from the outer CGC and passes through the side surface of the lens. It is converted to a parallel beam that scans in two axes by applying voltages to two area-segmented electrode layers sandwiching the CGCs and a liquid crystal layer formed on the CGCs. We have demonstrated scanning whose motion ranges were 360 degrees horizontally and 10° vertically. A beam with a spread angle of 0.3° × 0.8° at a minimum swept vertically up to a frequency of 100 Hz and ten equally spaced beams scanned rotationally with a 6-degree cycle variation of spread of between 0.8° and 3.5°.
format	article
author	Seiji Nishiwaki
author_facet	Seiji Nishiwaki
author_sort	Seiji Nishiwaki
title	Biaxial 360-degree scanning LIDAR using a liquid crystal control
title_short	Biaxial 360-degree scanning LIDAR using a liquid crystal control
title_full	Biaxial 360-degree scanning LIDAR using a liquid crystal control
title_fullStr	Biaxial 360-degree scanning LIDAR using a liquid crystal control
title_full_unstemmed	Biaxial 360-degree scanning LIDAR using a liquid crystal control
title_sort	biaxial 360-degree scanning lidar using a liquid crystal control
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/d80d9c4bb83d45b9ad5bb66e0feee40d
work_keys_str_mv	AT seijinishiwaki biaxial360degreescanninglidarusingaliquidcrystalcontrol
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Biaxial 360-degree scanning LIDAR using a liquid crystal control

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