Aberration correction for phased-array telescopes using phase diversity

Richard G. Paxman; Susan L. Crippen

doi:10.1117/12.23685

1 November 1990 Aberration correction for phased-array telescopes using phase diversity

Richard G. Paxman, Susan L. Crippen

Proceedings Volume 1351, Digital Image Synthesis and Inverse Optics; (1990) https://doi.org/10.1117/12.23685
Event: 34th Annual International Technical Symposium on Optical and Optoelectronic Applied Science and Engineering, 1990, San Diego, CA, United States

Abstract

In order for a phased-array telescope to achieve its resolution potential, the individual telescopes and beamcombining optics must be precisely aligned. Misalignments could be measured directly with laser interferometers. We present an alternative, based on Gonsalves’ phase-diversity concept, in which misalignments are inferred from the collected imagery. Once the misalignments have been estimated they can be used to actively correct the system or to construct a Wiener-Helstrom filter to deblur the collected imagery. The total process is referred to as multiple-plane measurement for aberration correction (MMAC). In this paper we present simulations that demonstrate the use of MMAC in estimating both piston and tilt misalignments in the presence of noise. Measurements of the sensitivity of MMAC to certain systematic errors are presented and a subframing technique is demonstrated.

Citation Download Citation

Richard G. Paxman and Susan L. Crippen "Aberration correction for phased-array telescopes using phase diversity", Proc. SPIE 1351, Digital Image Synthesis and Inverse Optics, (1 November 1990); https://doi.org/10.1117/12.23685

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