High Angular Resolution Astronomical Techniques: Speckle Interferometry And Related Methods

Simon P. Worden

doi:10.1117/12.959287

3 December 1980 High Angular Resolution Astronomical Techniques: Speckle Interferometry And Related Methods

Simon P. Worden

Proceedings Volume 0243, Applications of Speckle Phenomena; (1980) https://doi.org/10.1117/12.959287
Event: 24th Annual Technical Symposium, 1980, San Diego, United States

Abstract

The last decade has seen impressive progress towards the goal of removing degrading effects of the earth's atmosphere on astronomical data. Much of this work requires data obtained on tine scales shorter than change times in the atmospheric transfer function, typically 10 msec. Speckle interferometry, relying on post processing of short exposure images, provides two orders of magnitude increase in angular resolution for studying object sizes and binary star orbits. Instruments for detecting and recording individual photon arrivals extend speckle interferometry to at least stellar magnitude +15. Recent work shows that actual images are extractable from speckle data. Alternatively, deformable optics systems detect and correct wavefront errors to produce nearly diffraction-limited images in real time. Amplitude, Michelson, and intensity interferometry show good promise for getting very high resolution results from systems with optical path differences tens of meters in scale. Speckle and other forms of interferometry are now being extended to the infrared spectral region.

Citation Download Citation

Simon P. Worden "High Angular Resolution Astronomical Techniques: Speckle Interferometry And Related Methods", Proc. SPIE 0243, Applications of Speckle Phenomena, (3 December 1980); https://doi.org/10.1117/12.959287

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