131 citations · 417 across the 18 of their papers we have counts for
7 papers · 1 filter
Diffraction-limited axial scanning in thick biological tissue employing an aberration correcting adaptive lens
Katrin Philipp, Florian Lemke, Stefan Scholz +4
Diffraction-limited focusing deep into biological tissue is challenging due to spherical aberrations that lead to a broadening of the focal spot particularly in axial direction. Wh…
Depth-controlled Bessel beams
Angelina Müller, Matthias C. Wapler, Ulrike Wallrabe
We present a ring aperture with independently switchable segments for the three-dimensional control of quasi propagation invariant beams. We demonstrate that our liquid crystal des…
Topological in-plane polarized piezo actuation for compact adaptive lenses with aspherical correction
Florian Lemke, Moritz Stürmer, Ulrike Wallrabe +1
In this contribution, we investigate the effects of using in-plane polarized piezo actuators with topological buckling displacement to drive glass-piezo composite membranes for ada…
Single-Sided Contacting of Out-of-Plane Polarized Piezo Films for Fluid Membrane Lenses
Moritz Stürmer, Matthias C. Wapler, Ulrike Wallrabe
We present an adaptive lens which tunes its focal length with a glass membrane that is deformed by an integrated piezo bending actuator. A particular challenge in the fabrication o…
A compact, large-aperture tunable lens with adaptive spherical correction
Matthias C. Wapler, Moritz Stürmer, Ulrike Wallrabe
In this paper, we present the proof of concept of a very fast adaptive glass membrane lens with a large aperture/diameter ratio, spherical aberration correction and integrated actu…
Focusing Mirror with Tunable Eccentricity
Moritz Stürmer, Matthias C. Wapler, Jens Brunne +1
We present a new kind of varifocal mirror with independently adjustable curvatures in the major directions. For actuation we use two stacked piezo bending actuators with crossed in…