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

Abstract

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.