In recent years, distance measurement technology has advanced with the development of electronic devices, contributing to various industries. LIDAR, which stands for Light Detection and Ranging, uses laser light to detect reflections from objects and measure their distance. Typically, these distance measurement devices can accurately measure objects that are only a few centimeters away, while some products can measure distances as long as several meters. However, if either the displacement sensor or the object itself remains stationary, it is not possible to detect the surface shape of the object, including its tilt or unevenness. This research focuses on developing a measurement device that can accurately measure the distance to an object, even when the object has low surface contrast. The device is capable of measuring both the inclination and distance of an object at distances of several meters.
In the attention focused biomimetic technologies, the snail shell, whose surface is antifouling, is a mimic subject. In this paper, a metamaterial technology to obtain oil repellence and antifouling, not realized on the as fabricated material surfaces, is introduced. Silicon nano-pillars imitating the real snail were evaluated in oil repellence in water. For applying this structure to complex curved surfaces, the soft resin sheet with nano-structure was developed. The fabricated sheet was applied to a tube, and evaluated in oil water mixture flowing. Antifouling and no dirt growing are obtained in the tube inner surface. As an assumed application, the bile duct catheter was fabricated and indwelled in a pig body. After 7 days placement, the catheter inner surface is antifouling, and then the metamaterial catherter indicates the practical capabilities. The demonstrated nano-structures are attractive for a new metamaterial realization.
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