Improved multiple circular array configuration for sparse aperture optical imaging systems

Liu, Aimin; Gao, Limin; Xiao, Maosen

doi:10.1117/1.oe.56.7.073109

“…proposed a new type of multi-circular array (MCA array) [5]. In 2021, Rai et al developed a method based on the superposition of optical transfer functions of an incoherent imaging system to realize synthetic aperture imaging [6].…”

Section: Introductionmentioning

confidence: 99%

Study on space/frequency domain response mechanism of optical synthetic aperture imaging system

Liu

¹

,

Zhao

²

,

Wang

³

et al. 2022

Thirteenth International Conference on Information Optics and Photonics (CIOP 2022)

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Optical synthetic aperture (OSA) imaging system is an effective method for astronomical telescopes to realize superresolution imaging, which has important applications in astronomical observation and space remote sensing. The timedivision multiplexing sub-aperture array is a potentially powerful way to construct the larger array configuration by changing the basic array configuration several times with less apertures. In this paper, according to the theory of incoherent optical imaging, the physical mechanism of space/frequency domain response of OSA system is discussed. From the basic pinhole-aperture array to the circular-aperture array, the evolution of the point spread function (PSF) and the modulation transfer function (MTF) is analyzed. The inherent laws and imaging differences between the time-division multiplexing sub-aperture array and the traditional synthetic aperture array are revealed. Also, it is shown that under the specific array condition, the reconstructed image obtained by the time-division multiplexing synthetic aperture system can approach the imaging quality and resolution given by the traditional synthetic aperture array. It provides a new perspective for the array configuration design of OSA imaging system.

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“…In 2011, Li Liu proposed a multi-circular MCA array to increase the cutoff frequency and equivalent aperture [7]. In 2017, Aimin Liu proposed a high-cutoff frequency IMCA array based on the study conducted by Liu [8]. In 2019, Weijian Hao proposed a fractal-structure sparse aperture array and analyzed its imaging performance [9].…”

mentioning

confidence: 99%

Distributed Optical Synthetic Aperture Position-Transformed Method with High-Frequency Domain Coverage

zhang,

bao,

Fang

et al. 2023

Preprint

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Realizing an ultrahigh-equivalent aperture for space-based direct optical detection using a distributed optical synthetic aperture (DOSA) system with a very low filling ratio is challenging. This study proposes a distributed optical synthetic-aperture position-transformed array with high-frequency domain coverage called HFCASA, based on the Archimedean spiral. The study shows that Golay3 HFCASA with a filling ratio of 0.0675% can greatly improve frequency domain coverage and fulfill the resolution requirements of a 200 m aperture telescope. HFCASA provides the theoretical basis for the future deep-space exploration of DOSA.

show abstract

“…In 2011, Li Liu proposed a multi-circular MCA array to increase the cutoff frequency and equivalent aperture [7]. In 2017, Aimin Liu proposed a high-cutoff frequency IMCA array based on the study conducted by Liu [8]. In 2019, Weijian Hao proposed a fractal-structure sparse aperture array and analyzed its imaging performance [9].…”

mentioning

confidence: 99%

Distributed Optical Synthetic Aperture Position-Transformed Method with High-Frequency Domain Coverage

zhang,

bao,

Fang

et al. 2023

Preprint

0

View full text Add to dashboard Cite

Realizing an ultrahigh-equivalent aperture for space-based direct optical detection using a distributed optical synthetic aperture (DOSA) system with a very low filling ratio is challenging. This study proposes a distributed optical synthetic-aperture position-transformed array with high-frequency domain coverage called HFCASA, based on the Archimedean spiral. The study shows that Golay3 HFCASA with a filling ratio of 0.0675% can greatly improve frequency domain coverage and fulfill the resolution requirements of a 200 m aperture telescope. HFCASA provides the theoretical basis for the future deep-space exploration of DOSA.

show abstract

Improved multiple circular array configuration for sparse aperture optical imaging systems

Cited by 10 publications

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Study on space/frequency domain response mechanism of optical synthetic aperture imaging system

Study on space/frequency domain response mechanism of optical synthetic aperture imaging system

Distributed Optical Synthetic Aperture Position-Transformed Method with High-Frequency Domain Coverage

Distributed Optical Synthetic Aperture Position-Transformed Method with High-Frequency Domain Coverage

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