Higher order wavefront correction and axial scanning in a single fast and compact piezo-driven adaptive lens

Abstract

We present a compact adaptive glass membrane lens for higher order wavefront correction and axial scanning, driven by integrated segmented piezoelectric actuators. The membrane can be deformed in a combination of rotational symmetry providing focus control of up to ± 6 m−1 and spherical aberration correction of up to 5 wavelengths and different discrete symmetries to correct higher order aberrations such as astigmatism, coma and trefoil by up to 10 wavelengths. Our design provides a large clear aperture of 12 mm at an outer diameter of the actuator of 18 mm, a thickness of 2 mm and a response time of less than 2 ms.

Comparative Analysis of the Effect of Cutting Piezoelectric Ceramics on Optically Oriented Compensation Capability

“…The piezoelectric effect refers to the fact that when an external force is applied to the surface of a piezoelectric material, the material separates the positive and negative charges, resulting in an imbalance in the internal distribution of charges, which leads to the formation of potential differences and voltages [24]. The schematic diagram is shown in Figure 1a.…”

Design and Simulation of a 19-Electrode MEMS Piezoelectric Thin-Film Micro-Deformable Mirror for Ophthalmology

“…In this process, electric potential is transformed into strain along the direction of material polarization, leading to displacement. Typically, a thin layer of piezoceramic material with segmented electrodes is either directly deposited or glued beneath the reflective surface to achieve unimorph bending deformation [13]. Alternatively, an array of stack actuators with thickness actuation mode may be employed for reflective surface deformation [14][15][16][17][18][19][20][21][22][23][24].…”