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.
|Number of pages||4|
|Journal||Proceedings of SPIE - The International Society for Optical Engineering|
|Publication status||Published - 18 May 1987|