Catching an Optical Photograph via a Focus-Tunable Real-Time Imaging System

• • The ultrathin perovskite curved image sensor achieves a thickness of 5.4 μm, enabling conformal deformation to a hemispherical geometry with a curvature radius of 17.8 mm, while maintaining a maximum substrate strain of 5.72% localized at interconnections and edges, critical for flexible imaging applications. • • The sensor array achieves a low detection limit of 10 nW cm−2, approaching human photoreceptor sensitivity, which is essential for low-light imaging and biomedical applications. • • The hierarchical mesh design with serpentine interconnections effectively releases twisting and stretching stress, ensuring mechanical robustness under dynamic curvature, as validated by finite element analysis. • • The integration of a shape-tunable lens with the curved sensor enables real-time focus adjustment, mimicking human visual accommodation, which is pivotal for advanced imaging systems requiring variable depth of field.