Influence of Material Optical Properties in Direct ToF LiDAR Optical Tactile Sensing: Comprehensive Evaluation.

Area of Science:

• Robotics
• Materials Science
• Optical Engineering

Background:

• Optical tactile sensing is crucial for human-interactive robotics.
• Existing systems (TIR/FTIR) have limitations with complex setups and surface adaptability.

Purpose of the Study:

• To evaluate how optical properties of waveguide materials impact time-of-flight (ToF) signal behavior and sensing fidelity.
• To demonstrate a novel optical tactile platform, OptoSkin, for robust contact and pressure detection.

Main Methods:

• Systematic evaluation of diverse waveguide materials with varying transmission, scattering, reflectance, and refractive indices.
• Utilizing direct time-of-flight (ToF) LiDAR principles for sensing.

Main Results:

• Controlled light scattering within materials significantly enhances ToF signal quality.
• Demonstrated effectiveness for both direct touch and near-proximity sensing applications.

Conclusions:

• Material selection is critical for efficient, low-cost, and geometry-independent optical tactile systems.
• OptoSkin offers a promising solution for advanced robotic tactile sensing.