109 (10 pp.)
Liquid lenses are the simplest and cheapest optical lenses, and various studies have been conducted to develop tunable-focus liquid lenses. In this study, a simple and easily implemented method for achieving tunable-focus liquid lenses was proposed and experimentally validated. In this method, charges induced by a corona discharge in the air were injected into dielectric liquid, resulting in “electropressure” at the interface between the air and the liquid. Through a 3D-printed U-tube structure, a tunable-focus liquid lens was fabricated and tested. Depending on the voltage, the focus of the liquid lens can be adjusted in large ranges (−∞ to −9 mm and 13.11 mm to ∞). The results will inspire various new liquid-lens applications.
Original Publication Citation
Qian, S. Z., Shi, W. X., Zheng, H., & Liu, Z. H. (2020). Tunable-focus liquid lens through charge injection. Micromachines, 11(1), 109. doi:10.3390/mi11010109
Qian, Shizhi; Shi, Wenxiang; Zheng, Huai; and Liu, Zhaohui, "Tunable-Focus Liquid Lens through Charge Injection" (2020). Mechanical & Aerospace Engineering Faculty Publications. 93.