A haptic grasp interface based on the force myography technique is reported. The hand movements and forces during the object manipulation are assessed by an optical fiber sensor attached to the forearm, so the virtual contact is computed, and the reaction forces are delivered to the subject by graphical and vibrotactile feedbacks. The system was successfully tested for different objects, providing a non-invasive and realistic approach for applications in virtual-reality environments.

An optical fiber 3D shape sensor for motion capture is reported. The probe is comprised of Bragg grating strain sensors embedded into a 3D -printed polymer fiber substrate, allowing for the continuous assessment of the bending magnitude and direction. Moreover, the device was tested on the measurement of the forearm movements, making it possible to correctly replicate the captured motions in an avatar, providing a simple and minimally-invasive approach for applications in virtual reality.