Figure 1 | Concept of the wide-FOV, high spatiotemporal resolution LiDAR based on an astigmatic metalens (AML). (IMAGE)

Light Publishing Center, Changchun Institute of Optics, Fine Mechanics And Physics, CAS

Figure 1 | Concept of the wide-FOV, high spatiotemporal resolution LiDAR based on an astigmatic metalens (AML).

Caption

Figure 1 | Concept of the wide-FOV, high spatiotemporal resolution LiDAR based on an astigmatic metalens (AML).  a, Proposed LiDAR architecture integrating a metalens for wide-FOV capture of subtle environmental dynamics. b, Implementation of high temporal resolution. Inter-axis rate matching via spectral-acousto-optic (spectral-AO) scanning enables high-speed 2D beam scanning. When the slow-axis switching is fully synchronized with the fast-axis scanning cycle (rate mismatch factor β=1), the effective frame-wise point acquisition rate (FPAR) can be equal to the pixel-wise point acquisition rate (PPAR), realizing all-solid-state non-redundant scanning. c, Achievement of high spatial resolution. The wide-FOV AML simultaneously addresses the challenges of narrow FOV and beam astigmatism that degrade spatial resolution — issues that cannot be mitigated by a normal metalens (NML) without astigmatic compensation. d, Top: Imaging of a high-resolution target, demonstrating the system’s superior spatial resolution (~6.5 mrad). Bottom: Time-sliced evolution of a rapidly rotating fan, highlighting the system’s high temporal resolution (FPAR ~36.6 MHz).

Credit

Xiangang Luo et al.

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