Image inclination in differential synthetic aperture ladar

Lei Wan; Jin Wu; Danyang Li; Debin Wang; Changjun Ke

doi:10.1117/1.OE.58.3.033101

5 March 2019 Image inclination in differential synthetic aperture ladar

Lei Wan, Jin Wu, Danyang Li, Debin Wang, Changjun Ke

Author Affiliations +

Optical Engineering, Vol. 58, Issue 3, 033101 (March 2019). https://doi.org/10.1117/1.OE.58.3.033101

Abstract

A phenomenon, referred to as differential synthetic aperture ladar (DSAL) image inclination, is reported. The phenomenon states that in a stably operating DSAL system, the high-resolution image generated by DSAL technique is possibly inclined in the range direction. The range-inclined DSAL image does not change its resolution but makes the DSAL image differ from the real target structure, resulting in a kind of geometric deformation. Theoretical analysis shows that this inclination phenomenon originates from the geometric setting of the two receiving subapertures in the DSAL hardware and is independent of the target distance. By properly setting the subapertures, this phenomenon could be minimized. Detailed DSAL experimental results verified the theoretical interpretation. Methods to correct the inclined DSAL image are suggested.

Citation Download Citation

Lei Wan, Jin Wu, Danyang Li, Debin Wang, and Changjun Ke "Image inclination in differential synthetic aperture ladar," Optical Engineering 58(3), 033101 (5 March 2019). https://doi.org/10.1117/1.OE.58.3.033101

Received: 15 November 2018; Accepted: 15 February 2019; Published: 5 March 2019

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KEYWORDS

LIDAR

Image acquisition

Optical engineering

Photography

Signal detection

Lithium

Fiber lasers

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