Piezo-Actuated Higher Order Wavefront Correction Lens

We present an adaptive lens for higher order aspherical aberration correction based on a segmented piezo-glass-piezo active membrane. With a suitable application of voltages to the segmented electrodes, we can correct all aberrations of 2 ^nd and 3 ^rd order (defocus, astigmatism, coma and trefoil) and the spherical aberration by up to 5 μm (defocus of up to 45 μm, or 6 dpt). The lens comes with a large aperture of 12 mm at an outer diameter of 18 mm and a thickness of 2 mm.