Year: 2026
Type: article
Abstract: Piezo-driven tunable lenses offer high-aperture, compact size, and fast response, but hysteresis and creep in their piezoelectric actuators limit precision and complicate real-time control. We demonstrate a real-time feedback controller that leverages the direct piezoelectric effect to linearize the system response, enabling efficient linear control algorithms. Running on an FPGA, it delivers a 0.88 ms settling time and <0.5% RMS tracking error, demonstrating high fidelity, bandwidth, and linearity. Finite element simulations guide the integrated sensor design, validated through full opto-electro-mechanical characterization of the lens and controller.
Source: Applied Optics
DOI: 10.1364/ao.584047
Authors: Shahab Haidarian, Ulrike Wallrabe
Language: English
Subfield: Control and Systems Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Funder: Deutsche Forschungsgemeinschaft
Award: G322770399
OpenAlex ID: W7124870325