薄膜弯曲振动驱动液体变焦透镜的机理

Mechanism of Focus-Variable Liquid Lens Driven by Bending Vibration of Thin Films

提出了一种薄膜弯曲振动驱动液体变焦透镜的新型结构,理论分析和实验研究了该新型透镜的机理。结果表明,在薄膜弯曲振动驱动下,此透镜的压强为中心大边缘小,此透镜为凸透镜,其焦距随输入电压的增大而减小,焦距的变化范围为10~60mm。该透镜结构简单、轻薄且变焦范围大于其他液体变焦透镜,具有较强的实际应用价值。

A novel structure for the focus-variable liquid lens driven by the bending vibration of thin films is proposed, and the mechanism of this proposed novel lens is theoretically analyzed and experimentally investigated. The results show that, under the driving of the bending vibration of the thin films, the pressure in this proposed lens is large in its center and small in its edge, which indicates that this lens is a convex lens. Meanwhile, its focal length decreases with the increase of input voltage, and the focal length range is 10-60 mm. This proposed lens has a simple and thin structure, and a larger zoom range than that of other liquid zoom lenses, and thus has the strong practical application value.