Chongfan Technology
News
15
2026
-
06
Fourier ptychographic imaging with long-range horizontal paths
Author:
The team of Xiangang Luo and Mingbo Pu at the Institute of Optics and Electronics, Chinese Academy of Sciences, has demonstrated a horizontal‑path macroscopic Fourier ptychographic (FP) imaging technique with an imaging range exceeding 1.4 kilometers. By scanning a 100‑mm single‑aperture system along a meter‑scale translation stage, they achieved a resolution more than 2.3 times better than the diffraction limit of an equivalent single‑aperture system. The authors conducted a rigorous analysis of undersampling effects in kilometer‑scale FP, deriving both an f‑number criterion for single apertures to prevent undersampling in reconstructed images and a comprehensive formula for the undersampling ratio. The validity of this formula has been experimentally verified and compared with previous studies. The derived operational conditions for horizontal‑path FP provide constructive guidance for synthetic aperture optics, elucidating the relationship between synthetic aperture size and the actual resolution gain in kilometer‑scale super‑resolution imaging.
The research findings were published on April 29, 2026, in Laser & Photonics Reviews under the title “Long-Range Horizontal-Path Fourier Ptychography: A 1.4-km Experimental Demonstration.”
Figure 1: Overall schematic and experimental schematic
Figure 2: Experimental Results
Figure 3: Spectral broadening and undersampling caused by synthetic aperture
Figure 4: Schematic diagram of reconstruction results under different synthetic apertures.
Figure 5: Feasibility Analysis Diagram of the Synthetic Undersampling Theory
Source: Optics World
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