Image evaluation for optical synthetic aperture imaging system

Wang, Zhile; Zhang, Wei; Deng, Jian; Chen, Qihai

doi:10.1117/12.569907

Cited by 3 publications

(3 citation statements)

References 4 publications

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“…The synthetic aperture imaging technology folds and assembles small aperture sub-lenses on the ground. Subsequently, it unfolds sub-lenses controlled by the precision controller and the wavefront detector to synthesize the large aperture primary lens in orbit imaging [1]. Under the circumstances of the primary lens size limited by the carrier condition, this technology expands the imaging system equivalent aperture and improves the remote sensing imaging resolution by folding/unfolding approach.…”

Section: Synthetic Aperture Imaging Technologymentioning

confidence: 99%

Development of new ultra-large aperture optical remote sensing imaging technology

Niu

Zhi

Jiang

et al. 2023

Second International Conference on Optoelectronic Information and Computer Engineering (OICE 2023)

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With the rapid development of earth observation by optical remote sensing satellites, there is an urgent requirement of remote sensing data with high-resolution in environmental monitoring, urban planning and other applications. The resolution of remote sensing images (RSIs) significantly depends on the aperture size of space imaging system. However, limited by manufacturing level and carrying capacity, the traditional optical materials and reflection/refraction imaging principle have encountered a bottleneck in the manufacturing of space imaging system with ultra-large aperture and lightweight. Consequently, it is necessary to develop brand new space optical imaging systems. In this paper, we summarize the imaging mechanism and development history of three ultra-large aperture imaging technologies, including synthetic aperture imaging technology, diffractive membrane imaging technology and rotating synthetic aperture imaging technology, and analyze the challenges existing in their application.

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Section: Synthetic Aperture Imaging Technologymentioning

confidence: 99%

Development of new ultra-large aperture optical remote sensing imaging technology

Niu

Zhi

Jiang

et al. 2023

Second International Conference on Optoelectronic Information and Computer Engineering (OICE 2023)

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“…For the optical system with primary mirror segmented, the pupil function which contains the phase information can be expressed by means of generalized pupil function [14] : ) , ( y x P n is the transmission function and is 1within the telescope's aperture and zero, otherwise.…”

Section: Mathematical Model Of Optical Systemmentioning

confidence: 99%

Misalignment wavefront detection of large segmented aperture optical system on-orbit

Zhang

2010

5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes

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The optical systems with large collecting aperture and high resolution are the future development directions of optical systems on orbit. The primary mirror of optical system is segmented for its advantages in reducing the difficulty of manufacturing to achieve high imaging resolution. Once on orbit, it needs to correct the misalignment errors in optical system introduced by the effect of various factors. The phase retrieval based on quasi-Newton method nonlinear optimization is proposed to sense the wavefront aberration induced by segmented mirrors in the optical system. And the BFGS method is utilized to seek the optimum value of wavefront aberrations. Then the different defocus impacted on detection accuracy is analyzed. The result of the simulation experiment indicated that once select the suitable defocus, the phase retrieval method can control the wavefront detection error less than 6%.

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“…The synthetic aperture mentioned in this paper is obtained via the target's movement to form a synthesized array, which is not the real synthetic aperture described in ref. [2]. SAL research work can date back to last century in many external nations.…”

Section: Introductionmentioning

confidence: 99%

Research on indoor experimentation of range SAL imaging system

Guo

Xing

Zhang

et al. 2009

Sci. China Ser. E-Technol. Sci.

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By means of advantages of both SAR and lidar, the combination of the techniques of (inverse) synthetic aperture and lidar makes it possible to obtain high resolution 2-D image. In this paper, an indoor experimental system of inverse synthetic aperture lidar imaging is given and a processing approach is presented. The given system is in the mode of lidar system with separated receiver and transmitter, which can effectively eliminate the jamming from the lens or/and the intersection between two optic fibers. Based on the reference channel techniques, a method for the compensation of nonlinear frequency in the time domain is presented, which can solve the problem of nonlinear frequency efficiently. Then, with the mature inverse synthetic aperture algorithm, an image of inverse synthetic aperture lidar can be obtained, which is the first attempt in China. Finally, experimental results confirm the validity of the presented method and the feasibility of the experimental system. idar, synthetic aperture, range profile, phase error, imaging of rotating objects

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Image evaluation for optical synthetic aperture imaging system

Cited by 3 publications

References 4 publications

Development of new ultra-large aperture optical remote sensing imaging technology

Development of new ultra-large aperture optical remote sensing imaging technology

Misalignment wavefront detection of large segmented aperture optical system on-orbit

Research on indoor experimentation of range SAL imaging system

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