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Journal of the Optical Society of America

Journal of the Optical Society of America

  • Vol. 66, Iss. 11 — Nov. 1, 1976
  • pp: 1252–1256

Speckle interferometry lens-atmosphere MTF measurements

Douglas P. Karo and Arthur M. Schneiderman  »View Author Affiliations

JOSA, Vol. 66, Issue 11, pp. 1252-1256 (1976)

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Measurements are presented of lens-atmosphere modulation transfer functions for short-exposure speckle imaging at the AMOS observatory in Maui, Hawaii. Star images were recorded with a video sensor system and processed digitally. Near-diffraction-limited modulation transfer functions were recorded and analyzed for a 122 cm aperture instrument during fair to poor seeing conditions. Mean values for r0, the aperture wavefront correlation scale, ranged between 4.1 and 6.4 cm. Total projected rms image wander ranged from 0.2 to 1.1 arcsec. The results are in substantial agreement with theoretical predictions and laboratory simulation results.

© 1976 Optical Society of America

Douglas P. Karo and Arthur M. Schneiderman, "Speckle interferometry lens-atmosphere MTF measurements," J. Opt. Soc. Am. 66, 1252-1256 (1976)

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  1. A. Labeyrie, "Attainment of Diffraction Limited Resolution in Large Telescopes by Fourier Analyzing Speckle Patterns in Star Images," Astron. Astrophys. 6, 85–87 (1970).
  2. D. Korff, "Analysis of a method for obtaining near-diffractionlimited information in the presence of atmospheric turbulence," J. Opt. Soc. Am. 63, 971–980 (1973).
  3. C. Aime, "Measurement of averaged squared modulus of atmospheric-lens modulation transfer function," J. Opt. Soc. Am. 64, 1129–1132 (1974).
  4. D. P. Karo and A. M. Schneiderman, "Laboratory Simulation of Speckle Interferometry," (unpublished).
  5. A. Labeyrie, "Observations Interférométriques au Mont Palomar," Nouv. Rev. Opt. 5, 141–151 (1974).
  6. The SIT tube system used was model 1205D of the SSR Instruments Co.
  7. The MTF calculation of D. Korff (Ref. 2) involves a number of approximations which may make the high-frequency level uncertain by up to, perhaps, a factor of 2 [D. Korff (private communication) ].
  8. D. Korff, G. Dryden, and M. G. Miller, "Information Retrieval from Atmospheric Induced Speckle Patterns," Opt. Commun. 5, 187–192 (1972).
  9. If all the image wander were due to atmospheric phase effects, a wave front phase deviation up to nine waves would be implied [M. G. Miller (private communication)].

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