title: Note: Simple and compact piezoelectric mirror actuator with 100 kHz bandwidth, using standard components.
abstract: We propose a mounting scheme to control the displacement of a mirror (or other small object) by a cylindrical piezoelectric actuator, giving uniform response and no phase lag up to high frequencies. This requires a simple ring holder, and unmodified off-the-shelf components. In our implementation, the piezo-mirror assembly has its first mechanical resonance around 120 kHz, close to the resonance for the bare piezo. The idea is to decouple the fundamental elongation mode of the piezo-mirror assembly from the holder by side-clamping the assembly at its zero-displacement plane for this mode. The main drawback is a reduced mirror displacement, by a factor 2 in our case (mirror displacement is ~2.5 μm). Also, the mirror needs to be light with respect to the piezo: still, we use a standard half-inch mirror. The resulting system is very compact as it fits inside a 1-in. commercial steering mirror post.
authors.affiliation: Department of Physics, Umeå University, SE-901 87 Umeå, Sweden.
authors.forename: A
authors.initials: A
authors.lastname: Chadi
authors.forename: G
authors.initials: G
authors.lastname: Méjean
authors.forename: R
authors.initials: R
authors.lastname: Grilli
authors.forename: D
authors.initials: D
authors.lastname: Romanini