Focusing Mirror with Tunable Eccentricity
Moritz St\"urmer, Matthias C. Wapler, Jens Brunne, Ulrike Wallrabe
TL;DR
This paper introduces a novel tunable varifocal mirror with independently adjustable curvatures, utilizing stacked piezo actuators, capable of dynamic focus adjustment and aberration correction.
Contribution
It presents a new mirror design with tunable eccentricity and demonstrates a prototype with characterized mechanical and optical performance.
Findings
Successful prototype demonstrating tunable focal length
Mechanical deflection characterized and validated
Potential applications in adaptive optics and aberration correction
Abstract
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-plane polarization. This mirror can be used for example as an off-axis focusing device with tunable focal length and compensation for a variable angle of incidence or for coma correction. We demonstrate the prototype of such a mirror and characterize the mechanical deflection, as well as the focusing capabilities.
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