High speed single- and dual-stage vertical positioners

Yuen K Yong; Sachin P Wadikhaye; Andrew J Fleming

doi:10.1063/1.4960080

High speed single- and dual-stage vertical positioners

Rev Sci Instrum. 2016 Aug;87(8):085104. doi: 10.1063/1.4960080.

Authors

Yuen K Yong¹, Sachin P Wadikhaye¹, Andrew J Fleming¹

Affiliation

¹ School of Electrical Engineering and Computer Science at The University of Newcastle, Callaghan, NSW, Australia.

PMID: 27587157
DOI: 10.1063/1.4960080

Abstract

This article presents a high-speed single- and dual-stage vertical positioners for applications in optical systems. Each positioner employs a unique end-constraint method with orthogonal flexures to preload a piezoelectric stack actuator. This end-constraint method also significantly increases the first mechanical resonance frequency. The single-stage positioner has a displacement range of 7.6 μm and a first resonance frequency of 46.8 kHz. The dual-stage design consists of a long-range slow-stage and a short-range fast-stage. An inertial counterbalance technique was implemented on the fast-stage to cancel inertial forces resulting from high-speed motion. The dual-stage positioner has a combined travel range of approximately 10 μm and a first evident resonance frequency of 130 kHz.