Exploring Wavefront Detection in Imaging Systems with Rectangular Apertures Using Phase Diversity

• Published in: Sensors (Basel, Switzerland) Vol. 24; no. 4; p. 1191
• Main Authors: Li, Yibo, Guo, Jiang, Liu, Rengcong
• Format: Journal Article
• Language: English
• Published: Switzerland MDPI AG 11.02.2024; MDPI
• Subjects: Algorithms; Discovery and exploration; Equipment and supplies; Fourier transforms; Image processing; Imaging systems; Legendre polynomial; Mirrors; Outer space; phase diversity method; Polynomials; rectangular aperture imaging system; Sensors; space telescope; Space telescopes; Telescope; wavefront detection; space telescope; phase diversity method; wavefront detection; Legendre polynomial; rectangular aperture imaging system
• ISSN: 1424-8220; 1424-8220
• DOI: 10.3390/s24041191

The attainment of a substantial aperture in the rotating synthetic aperture imaging system involves the rotation of a slender rectangular primary mirror. This constitutes a pivotal avenue of exploration in space telescope research. Due to the considerable aspect ratio of the primary mirror, environmental disturbances can significantly impact its surface shape. Active optical technology can rectify surface shape irregularities through the detection of wavefront information. The Phase Diversity (PD) method utilizes images captured by the imaging system to compute wavefront information. In this study, the PD method is applied to rotating synthetic and other rectangular aperture imaging systems, employing Legendre polynomials to model the wavefront. The study delved into the ramifications stemming from the aperture aspect ratio and aberration size.