2026-04-17T07:47:20Zhttps://recercat.cat/oai/requestoai:recercat.cat:2117/4485442026-01-30T09:02:04Zcom_2072_1033col_2072_452950
On-skin, micro-objective enabled camera module for speckle contrast optical spectroscopy/tomography
Quiroga, Andres
Cortese, Lorenzo
Verma, Manish
Dannberg, Peter
Tachtsidis, Ilias
Danz, Norbert
Durduran, Turgut
Àrees temàtiques de la UPC::Física
Spectrum analysis
Spectroscopy
Anàlisi espectral
In this paper, we introduce a speckle contrast optical spectroscopy/tomography (SCOS/SCOT) configuration based on an integrated imaging approach exploiting 113 microobjectives mounted on a commercial CMOS camera that operates without fiber coupling, suitable for direct skin contact measurements and simultaneous multiple source-detector separation acquisitions. This compact system was validated ex vivo on phantoms and in vivo by monitoring the blood flow on the forearm muscle of a healthy human subject. The measurements, performed at multiple source-detector separations and camera exposure times, demonstrate excellent agreement with the theory based on the correlation-diffusion model. In vivo data demonstrate the capability of tracking pulsatile blood flow with a high signal-to-noise ratio (>4 harmonics of the cardiac pulse frequency detected) and sensitivity to small changes in muscle blood flow. This micro-objective array-based design overcomes a key challenge towards wearable SCOS/SCOT devices.
Peer Reviewed
2025-10-01
Quiroga, A. [et al.]. On-skin, micro-objective enabled camera module for speckle contrast optical spectroscopy/tomography. Optica, 2025. DOI 10.1364/BOE.571276 .
https://hdl.handle.net/2117/448544
10.1364/BOE.571276
eng
https://opg.optica.org/boe/fulltext.cfm?uri=boe-16-10-4091
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info:eu-repo/grantAgreement/EC/HE/101099291/EU/Fast gated superconducting nanowire camera for multi-functional optical tomograph/fastMOT
info:eu-repo/grantAgreement/EC/HE/101099093/EU/Preterm Brain-Oxygenation and Metabolic EU-Sensing: Feed the Brain/Prometeus
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info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023/PID2023-151973OB-I00/ES/PLATAFORMA FOTONICA PORTATIL PARA LA DETECCION PRECOZ DEL SHOCK EN EL AMBITO PREHOSPITALARIO Y HOSPITALARIO/
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SCOSWear
PHOTOSHOCK,
LUX4MED/MEDLUX
info:eu-repo/grantAgreement/EC/H2020/786350/EU/Photometabolic Self-Replication/PSR
2019-FIB-00968
2022-SGR-01457
RIS3CAT-001-P-001682
R21EB031261
Open Access
13 p.
application/pdf
Optica