Synthetic aperture ladar imaging with one-way far-field diffraction
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Institute of Electronics, CAS,University of CAS,University of CAS,University of CAS,Institute of Electronics,CAS,Institute of Electronics,CAS,University of CAS,University of CAS
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Abstract:
A laboratory SAL setup that can produce well-focused SAL images using laser illumination with one-way far-field diffraction is introduced. Using 1 550 nm fiber laser, the SAL can focus images from target distance of about 2.4 m with azimuth resolution of about 560 μm and range resolution of about 170 μm. High-resolution SAL images are generated by straightforwardly following standard SAL image formation theory, not by the aid of phase gradient autofocus (PGA) technique. Detailed results, showing both a typical two-step SAL focusing process and high resolution image, are illustrated.A laboratory SAL setup produced well-focused SAL images using laser illumination with one-way far-field diffraction. Using 1550 nm fiber laser, the SAL can focus images from target distance of about 2.4 m with azimuth resolution of about 560 μm and range resolution of about 170 μm. High-resolution SAL images are generated by straightforwardly following standard SAL image formation theory, without the aid of phase gradient autofocus (PGA) technique. Detailed results show a typical two-step SAL focusing process and a high resolution image.
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WU Jin, YANG Zhao-Sheng, ZHAO Zhi-Long, LI Fei-Fei, WANG Dong-Lei, TANG Yong-Xin, SU Yuan-Yuan, LIANG Na. Synthetic aperture ladar imaging with one-way far-field diffraction[J]. Journal of Infrared and Millimeter Waves,2013,32(6):514~518