Sub-aperture field of view mismatch in differential synthetic aperture ladar

Guo Zhang; Yebin Zhang; Kai Wang; Shoubao Han; Zhonghao Zhou; Chao Li; Lei Wang

doi:10.1117/12.2602024

31 August 2021 Sub-aperture field of view mismatch in differential synthetic aperture ladar

Guo Zhang, Yebin Zhang, Kai Wang, Shoubao Han, Zhonghao Zhou, Chao Li, Lei Wang

Proceedings Volume 11907, Sixteenth National Conference on Laser Technology and Optoelectronics; 119070U (2021) https://doi.org/10.1117/12.2602024
Event: Sixteenth National Conference on Laser Technology and Optoelectronics, 2021, Shanghai, China

Abstract

DSAL (Differential synthetic aperture ladar) eliminates the phase disturbance caused by atmospheric turbulence and mechanical trembling based on hardware structures. With proper hardware settings, DSAL can effectively reconstruct the phase history data without phase error, making them promising applications in far-distance ladar imaging. However, the final image quality is reduced when the field of view between the right sub-aperture and left sub-aperture at adjacent azimuth sampling position mismatches. In this paper, we derive an analytical modal for the DSAL imaging process with sub-aperture field of view mismatching and simulate the process with three targets. We introduce a factor 􀝇 to characterize the field of view mismatching and simulate the reconstructed image quality under different 􀝇 values. The results show that in practical applications, we should avoid the sub-aperture field of view mismatching, e.g., by controlling the azimuth sampling interval setting and improving stability of the ladar platform, making full use of DSAL’s advantages in far-distance ladar imaging.

Citation Download Citation

Guo Zhang, Yebin Zhang, Kai Wang, Shoubao Han, Zhonghao Zhou, Chao Li, and Lei Wang "Sub-aperture field of view mismatch in differential synthetic aperture ladar", Proc. SPIE 11907, Sixteenth National Conference on Laser Technology and Optoelectronics, 119070U (31 August 2021); https://doi.org/10.1117/12.2602024

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