Table 2 Metalens-based telescope systems compared with scientific machines
From: Review for optical metalens based on metasurfaces: fabrication and applications
Year | References | Type | Diameter | Focal length | Band | Material | Resolution |
|---|---|---|---|---|---|---|---|
1990 | Hubble Space Telescope267 | Ritchey–Chrétien type | 2.4 m (PM) | 57.6 m | 0.1–2.5 μm | Ultra-low expansion glass with layers of Al and MgF2 | 0.13 arcseconds at IR |
2020 | Cassegrain-type metalenses | 1 mm (PM) | 0.3 mm | 0.78 μm | Au nanostructures on SiO2 substrate with layers of Au and SiO2 | ~150 μm | |
2021 | James Webb Space Telescope (https://science.nasa.gov/mission/webb) | Korsch type | 6.5 m (PM) | 131.4 m | 0.6–28.5 μm | Be with layers of Au and SiO2 | ~0.1 arcseconds at IR |
2022 | Metalens | 80 mm | 260 mm | 1.45 μm | a-Si nanostructures on SiO2 wafer | 15 lp/mrad | |
2024 | Metalens | 100 mm | 150 mm | 0.633 μm | SiO2 nanostructures and substrate | 20 lp/mrad | |
2025 | Metalens with stop | 46.8 mm | 91.5 mm | 0.633 μm | Si3N4 nanostructures on SiO2 wafer | 7.3 lp/mrad | |
2025 | Metalens | 100 mm | 200 mm | 0.4–0.8 μm | PR nanostructures on SiO2 wafer | 181 lp/mm |
