131 citations · 349 across the 17 of their papers we have counts for
17 papers
Integrated Sensor System to Control the Temperature Effects and the Hysteresis on Adaptive Fluid-Membrane Piezoelectric Lenses
Hitesh Gowda Bettaswamy Gowda, Ulrike Wallrabe
We present in this paper an integrated sensor system for closed-loop control of the temperature effects and the hysteresis on the refractive power of an adaptive fluid-membrane pie…
Micro Fresnel Mirror Array with Individual Mirror Control
Binal Poyyathuruthy Bruno, Robert Schütze, Ruediger Grunwald +1
We present the design and fabrication of a miniaturized array of piezoelectrically actuated high speed Fresnel mirrors with individual mirror control. These Fresnel mirrors can be…
Multiphysics simulation of the aspherical deformation of piezo-glass membrane lenses including hysteresis, fabrication and non-linear effects
Florian Lemke, Yasmina Frey, Binal P Bruno +5
In this paper we present and verify the non-linear simulation of an aspherical adaptive lens based on a piezo-glass sandwich membrane with combined bending and buckling actuation.…
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…
Properties of piezoceramic materials in high electric field actuator applications
Binal P Bruno, Ahmed Raouf Fahmy, Moritz Stürmer +2
In this paper, we compare the performance of 8 PZT ceramics and one PMN-PT material for typical bending actuator applications. This includes the measurement of non-linear transvers…
Inverse design method for metalens with optical vortices towards light focusing through localized phase retardation
Yongbo Deng, Ulrike Wallrabe, Yihui Wu +1
Metalenses can achieve diffraction-limited focusing through localized phase manipulation of the incoming light beam. Because these structures are ultrathin, less than a wavelength,…