High resolution interferometric imaging using a large optical telescope

R. H. Frater, J. G. Robertson, J. D. O’Sullivan, R. P. Norris

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


Large optical telescopes (diameter ∼4m) used for astronomy have a theoretical diffraction-limited angular resolution of ∼0.03 arcsec. However, when used for conventional long-exposure imaging, the resolution is degraded to ∼1 arcsec by phase perturbations due to the Earth’s atmosphere. We discuss methods to overcome this so-called “seeing” limit, with particular reference to a method based on the use of a mask in the aperture plane of the telescope. We discuss results from preliminary tests of this method.

Original languageEnglish
Pages (from-to)255-258
Number of pages4
JournalProceedings of SPIE - The International Society for Optical Engineering
Publication statusPublished - 18 May 1987
Externally publishedYes


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