Three-dimensional confocal scanning microscope using an MEMS mirror for lateral scan and an MEMS lens scanner for depth scan

Abstract

We present a three-dimensional confocal scanning microscope using MEMS scanners for both the lateral and the axial scan. The lateral scan is performed by an electrothermal two-axis MEMS mirror that is capable of scanning large angles up to ± 20° at low driving voltages less than 4.5 V. The depth scan is accomplished by an electrothermal lens scanner with a large tunable range of 475 μm at 3 V. 2D and 3D confocal images have been obtained by this system.