RamaCam: Autonomous in-situ monitoring system of marine particles by combining holography and Raman spectroscopy
RamaCam: Autonomous in-situ monitoring system of marine particles by combining holography and Raman spectroscopy
Suspended particles in the ocean play an important role in global nutrient cycles. In this paper, a novel technique for the non-contact fast identification of marine particles is reported. An integrated method of digital holography and Raman spectroscopy aiming at in-situ continuous monitoring of marine particles, particularly in the deep sea where the density of particles is extremely low, is proposed. A particle located in a 20 cm water channel was illuminated using a collimated continuous wave laser beam which is used to take both a hologram and Raman spectrum to identify the shape, size and composition of the suspended material. Using a compact system, we have demonstrated the morphological and chemical analysis of plastic particles in a large volume of water. Furthermore, we have developed the in-situ device and tested it in the deep sea at a water depth of 900 m for the first time. The technique will contribute to the understanding of global-scale marine particle distributions.
Holography, In-situ optical sensing, Marine particles, Raman spectroscopy
Takahashi, Tomoko
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Liu, Zonghua
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Thevar, Thangavel
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Burns, Nicholas
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Sangekar, Mehul
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Lindsay, Dhugal
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Watson, John
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Thornton, Blair
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6 March 2023
Takahashi, Tomoko
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Liu, Zonghua
76b789cb-cddf-49c2-89dd-ca8a56997486
Thevar, Thangavel
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Burns, Nicholas
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Sangekar, Mehul
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Lindsay, Dhugal
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Watson, John
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Thornton, Blair
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Takahashi, Tomoko, Liu, Zonghua, Thevar, Thangavel, Burns, Nicholas, Sangekar, Mehul, Lindsay, Dhugal, Watson, John and Thornton, Blair
(2023)
RamaCam: Autonomous in-situ monitoring system of marine particles by combining holography and Raman spectroscopy.
In 2023 IEEE International Symposium on Underwater Technology, UT 2023.
IEEE..
(doi:10.1109/UT49729.2023.10103388).
Record type:
Conference or Workshop Item
(Paper)
Abstract
Suspended particles in the ocean play an important role in global nutrient cycles. In this paper, a novel technique for the non-contact fast identification of marine particles is reported. An integrated method of digital holography and Raman spectroscopy aiming at in-situ continuous monitoring of marine particles, particularly in the deep sea where the density of particles is extremely low, is proposed. A particle located in a 20 cm water channel was illuminated using a collimated continuous wave laser beam which is used to take both a hologram and Raman spectrum to identify the shape, size and composition of the suspended material. Using a compact system, we have demonstrated the morphological and chemical analysis of plastic particles in a large volume of water. Furthermore, we have developed the in-situ device and tested it in the deep sea at a water depth of 900 m for the first time. The technique will contribute to the understanding of global-scale marine particle distributions.
Text
Takahashi_2023_UT
- Author's Original
More information
Published date: 6 March 2023
Additional Information:
Funding Information:
The authors would like to thank the KM-ROV operation team and R/V Kaimei crew for their assistance during the KM21-08 cruise. The project is funded by the Japan Science and Technology Agency and Natural Environment Research Council under the SICORP program (grant number: JPMJSC1705, NE/R01227X/1). Kajima Foundation under the program of “Overseas Research Grant”, and the Japan Society for the Promotion of Science (grant number: 18H03810, 18K13934).
Publisher Copyright:
© 2023 IEEE.
Venue - Dates:
2023 IEEE International Symposium on Underwater Technology, UT 2023, , Tokyo, Japan, 2023-03-06 - 2023-03-09
Keywords:
Holography, In-situ optical sensing, Marine particles, Raman spectroscopy
Identifiers
Local EPrints ID: 473747
URI: http://eprints.soton.ac.uk/id/eprint/473747
PURE UUID: 87c288d9-9bbe-4dd4-920d-1b43cbd40a9c
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Date deposited: 30 Jan 2023 20:06
Last modified: 18 Mar 2024 05:30
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Contributors
Author:
Tomoko Takahashi
Author:
Zonghua Liu
Author:
Thangavel Thevar
Author:
Nicholas Burns
Author:
Mehul Sangekar
Author:
Dhugal Lindsay
Author:
John Watson
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