TY - GEN
T1 - Characterizing Material Effects on Direct ToF Signal Response in Optical Tactile Systems
AU - Aulika, Ilze
AU - Ogurcovs, Andrejs
AU - Ķemere, Meldra
AU - Bundulis, Arturs
AU - Aulika, Ilze
AU - Butikova, Jeļena
AU - Vembris, Aivars
AU - Šarakovskis, Anatolijs
AU - Bacher, E.
AU - Laurenzis, M.
AU - Schertzer, S.
AU - Stopar, J.
AU - Zore, A.
AU - Kamnik, R.
AU - Munih, M.
AU - Cartiel, S.
AU - Garcia-Pueyo, J.
AU - Muñoz, A.
N1 - Publisher Copyright:
© 2025 SPIE. All rights reserved.
PY - 2025
Y1 - 2025
N2 - Optical tactile sensing holds transformative potential for robotics, particularly in collaborative environments where touch perception enhances safety, adaptability, and cognitive interaction. However, traditional tactile technologies based on total internal reflection (TIR) and frustrated total internal reflection (FTIR) - such as those used in touchscreen systems - face significant limitations. These include reliance on multiple infrared light sources and cameras, as well as poor adaptability to the complex, curved geometries often found in robotic systems. To address these challenges, we recently introduced OptoSkin [1], an advanced optical tactile sensor based on direct Time-of-Flight (ToF) technology, enabling touch and pressure detection. In this study, we investigate how specific material properties, particularly light scattering, influence the sensitivity of contact point detection under direct ToF sensing. Four materials with distinct scattering coefficients ranging from 0.02 cm-1 to 1.1 cm-1 at 940 nm were selected to assess their impact on signal quality across different contact scenarios involving various target surfaces.
AB - Optical tactile sensing holds transformative potential for robotics, particularly in collaborative environments where touch perception enhances safety, adaptability, and cognitive interaction. However, traditional tactile technologies based on total internal reflection (TIR) and frustrated total internal reflection (FTIR) - such as those used in touchscreen systems - face significant limitations. These include reliance on multiple infrared light sources and cameras, as well as poor adaptability to the complex, curved geometries often found in robotic systems. To address these challenges, we recently introduced OptoSkin [1], an advanced optical tactile sensor based on direct Time-of-Flight (ToF) technology, enabling touch and pressure detection. In this study, we investigate how specific material properties, particularly light scattering, influence the sensitivity of contact point detection under direct ToF sensing. Four materials with distinct scattering coefficients ranging from 0.02 cm-1 to 1.1 cm-1 at 940 nm were selected to assess their impact on signal quality across different contact scenarios involving various target surfaces.
KW - frustrated total internal reflection (FTIR)
KW - light detection and ranging (LIDAR)
KW - light guide
KW - optical sensing
KW - tactile sensing
KW - time-of-flight (ToF)
KW - touch detection
UR - https://www.spiedigitallibrary.org/conference-proceedings-of-spie/13527/3056377/Characterizing-material-effects-on-direct-ToF-signal-response-in-optical/10.1117/12.3056377.short
UR - https://www.scopus.com/pages/publications/105007905683
U2 - 10.1117/12.3056377
DO - 10.1117/12.3056377
M3 - Conference paper
SN - 9781510688506
VL - 13527
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Optical Sensors 2025
A2 - Baldini, Francesco
A2 - Homola, Jiri
A2 - Lieberman, Robert A.
PB - SPIE
CY - Bellingham
ER -