biostudies-literatureMukashev DMinistry of Education and Science of the Republic of KazakhstanNazarbayev University6807https://www.ebi.ac.uk/biostudies/studies/S-EPMC9503177biostudies-literatureUnknown22(18)The sense of touch is fundamental for a one-to-one mapping between the environment and a robot that physically interacts with the environment. Herein, we describe a tactile fingertip design that can robustly detect interaction forces given data collected from a camera. This design is based on the photoelastic effect observed in silicone matter. Under the force applied to the silicone rubber, owing to the stress-induced birefringence, the light propagating within the silicone rubber is subjected to the angular phase shift, where the latter is proportional to the increase in the image brightness in the camera frames. We present the calibration and test results of the photoelastic sensor design on a bench using a robot arm and with a certified industrial force torque sensor. We also discuss tSensors (Basel, Switzerland)PhotoElasticFinger: Robot Tactile Fingertip Based on Photoelastic Effect.PMC9503177AP0905805011022021FD290111022021FD2923Zhuzbay NMukashev DKappassov ZOrazbayev BKoshkinbayeva AfalsePhotoElasticFinger: Robot Tactile Fingertip Based on Photoelastic Effect.The sense of touch is fundamental for a one-to-one mapping between the environment and a robot that physically interacts with the environment. Herein, we describe a tactile fingertip design that can robustly detect interaction forces given data collected from a camera. This design is based on the photoelastic effect observed in silicone matter. Under the force applied to the silicone rubber, owing to the stress-induced birefringence, the light propagating within the silicone rubber is subjected to the angular phase shift, where the latter is proportional to the increase in the image brightness in the camera frames. We present the calibration and test results of the photoelastic sensor design on a bench using a robot arm and with a certified industrial force torque sensor. We also discuss t2022-01-01T00:00:00Z2022 Sep2025-04-05T10:08:48.827Z2025-02-19T00:42:17.202ZS-EPMC95031773614616410.3390/s22186807