Ultrasound liquid crystal lens

作者：Shimizu Yuki; Koyama Daisuke^*; Fukui Marina; Emoto Akira; Nakamura Kentaro; Matsukawa Mami

来源：Applied Physics Letters, 2018, 112(16): 161104.

DOI：10.1063/1.5027131

A variable-focus lens using a combination of liquid crystals and ultrasound is discussed. The lens uses a technique based on ultrasound vibration to control the molecular orientation of the liquid crystal. The lens structure is simple, with no mechanical moving parts and no transparent electrodes, which is helpful for device downsizing; the structure consists of a liquid crystal layer sandwiched between two glass substrates with a piezoelectric ring. The tens-of-kHz ultrasonic resonance flexural vibration used to excite the lens generates an acoustic radiation force on the liquid crystal layer to induce changes in the molecular orientation of the liquid crystal. The orientations of the liquid crystal molecules and the optical characteristics of the lens were investigated under ultrasound excitation. Clear optical images were observed through the lens, and the focal point could be controlled using the input voltage to the piezoelectric ring to give the lens its variable-focus action. Published by AIP Publishing.

• 出版日期2018-4-16