Department of Mechanical Engineering, Hanyang University, Seoul 04763, Republic of Korea.
Korea Institute of Industrial Technology, Cheonan 31056, Republic of Korea.
Bioinspir Biomim. 2022 May 24;17(4). doi: 10.1088/1748-3190/ac6c65.
In this study, an artificial compound eye lens (ACEL) was fabricated using a laser cutting machine and polyvinyl alcohol (PVA) solution. A laser cutter was used to punch micro-sized holes (500 m diameter-the smallest possible diameter) into an acrylic plate; this punched plate was then placed on the aqueous PVA solution, and the water was evaporated. The plate was used as the mold to obtain a polydimethylsiloxane (PDMS) micro lens array film, which was fixed to a dome-shaped three-dimensional-printed mold for further PDMS curing, and a hemispherical compound eye lens was obtained. Using a gallium nitride (GaN) photodetector, a light detection experiment was performed with the ACEL, bare lens, and no lens by irradiating light at various angles under low temperatures. The photodetector with the ACEL generated a high photocurrent under several conditions. In particular, when the light was irradiated at 0° and below -20 °C, the photocurrent of the GaN sensor with the ACEL increased by 61% and 81% compared with the photocurrent of the GaN sensor with the bare lens and without a lens, respectively. In this study, a sensor for detecting light with ACEL was demonstrated in low-temperature environments, such as indoor refrigerated storages and external conditions in Antarctica and Arctic.
在这项研究中，使用激光切割机和聚乙烯醇 (PVA) 溶液制造了人工复眼透镜 (ACEL)。激光切割机用于在亚克力板上打孔（直径 500μm-最小可能直径）；然后将打孔板放在水性 PVA 溶液上，待水蒸发后，该板用作模具以获得聚二甲基硅氧烷 (PDMS) 微透镜阵列膜，将其固定在半球形三维打印模具上以进一步固化 PDMS，从而获得半球形复眼透镜。使用氮化镓 (GaN) 光电探测器，通过在低温下从各个角度照射光，对 ACEL、裸透镜和无透镜进行了光探测实验。在几种条件下，带有 ACEL 的光电探测器产生了高光电流。特别是当光以 0°以下和-20°C 以下的角度照射时，与裸透镜和无透镜的 GaN 传感器相比，带有 ACEL 的 GaN 传感器的光电流分别增加了 61%和 81%。在这项研究中，在低温环境（如室内冷藏库和南极洲和北极的外部条件）中展示了带有 ACEL 的光检测传感器。
