マイクロレンズアレイを用いた薄型視覚型触覚センサ
A Thin Format Vision-Based Tactile Sensor with A Micro Lens Array (MLA)
マイクロレンズアレイを採用し、厚さ5mmの薄型でありながら高空間分解能な3D触覚情報（変位分布や力分布）を取得できる視覚型触覚センサを開発した。
著者: Xia Chen, Guanlan Zhang, Michael Yu Wang, Hongyu Yu
分類: cs.RO, cs.CV, eess.IV
原文アブストラクト
Vision-based tactile sensors have been widely studied in the robotics field for high spatial resolution and compatibility with machine learning algorithms. However, the currently employed sensor's imaging system is bulky limiting its further application. Here we present a micro lens array (MLA) based vison system to achieve a low thickness format of the sensor package with high tactile sensing performance. Multiple micromachined micro lens units cover the whole elastic touching layer and provide a stitched clear tactile image, enabling high spatial resolution with a thin thickness of 5 mm. The thermal reflow and soft lithography method ensure the uniform spherical profile and smooth surface of micro lens. Both optical and mechanical characterization demonstrated the sensor's stable imaging and excellent tactile sensing, enabling precise 3D tactile information, such as displacement mapping and force distribution with an ultra compact-thin structure.
