公开(公告)号：US10473925B2

公开(公告)日：2019-11-12

申请号：US15415094

申请日：2017-01-25

Applicant: GM Global Technology Operations LLC

Inventor： Michael D. Alarcon ,  Norman J. Weigert ,  Dan W. Mepham ,  Hongguang Sun

IPC: G02B27/00 ,  G03B17/02

Abstract: A self-cleaning lens system disposed adjacent a camera is disposed. The system may incorporate a piezoelectric (PZT) lens system having a first PZT element secured to a first peripheral portion of the lens element, which may be responsive to an alternating current (AC) signal applied to the first PZT element. An AC signal may excite the first PZT element to cause shear displacements in opposite longitudinal directions and to create an oscillating shear motion for the first PZT element. The oscillating shear motion may cause an oscillating rotational movement of the lens element that removes the environmental element from a surface of the lens element.