Under-display camera (UDC) systems enable full-screen displays in smartphones
by embedding the camera beneath the display panel, eliminating the need for
notches or punch holes. Jedoch, the periodic pixel structures of display
panels introduce significant optical diffraction effects, leading to imaging
artifacts and degraded visual quality. Conventional approaches to mitigate
these distortions, such as deep learning-based image reconstruction, are often
computationally expensive and unsuitable for real-time applications in consumer
electronics. This work introduces an inverse-designed metasurface for wavefront
restoration, addressing diffraction-induced distortions without relying on
external software processing. The proposed metasurface effectively suppresses
higher-order diffraction modes caused by the metallic pixel structures,
restores the optical wavefront, and enhances imaging quality across multiple
wavelengths. By eliminating the need for software-based post-processing, our
approach establishes a scalable, real-time optical solution for diffraction
management in UDC systems. This advancement paves the way to achieve
software-free real-time image restoration frameworks for many industrial
applications.

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