Measurement of r sub 0 with speckle interferometry

Details Measurement of r sub 0 with speckle interferometry Measurement of r sub 0 with speckle interferometry

Mar 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978josa...68..348s&link_type=abstract

Optical Society of America, Journal, vol. 68, Mar. 1978, p. 348-351.

Physics

Optics

5

Atmospheric Optics, Interferometry, Light Transmission, Speckle Patterns, Stellar Spectrophotometry, Atmospheric Turbulence, Modulation Transfer Function

Scientific paper

Stellar speckle interferometry of unresolved objects yields the short-exposure lens-atmosphere MTF. Using Korff's (1973) calculations, a value of the wave correlation scale (r sub 0) can be obtained from the MTF. This is demonstrated, and it is also shown how the power spectra can be corrected so that r sub 0 values can be extracted from resolvable object data. Assuming the validity of Korff's calculations for speckle interferometry, unresolved and resolved object data can then be used to test calculations for short- and long-exposure imaging. Tests with field data show only a weak distinction in speckle interferometry between short- and long-exposure imaging. A Gaussian image shape does not agree with the data.

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