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Journal of the Optical Society of America A

Journal of the Optical Society of America A

| OPTICS, IMAGE SCIENCE, AND VISION

  • Vol. 19, Iss. 4 — Apr. 1, 2002
  • pp: 745–752

Tip/tilt estimation from defocused images

Marcos A. van Dam and Richard G. Lane  »View Author Affiliations


JOSA A, Vol. 19, Issue 4, pp. 745-752 (2002)
http://dx.doi.org/10.1364/JOSAA.19.000745


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Abstract

In astronomical imaging, the errors in the wave-front slope are a significant cause of aberrations in the detected image. We investigate how the slope can be estimated optimally using an intensity measurement of the propagated wave front. We show that the optimal location for detection of wave-front tilt is the focal plane, and we quantify the error in using defocused images, such as would be obtained from a curvature sensor, for estimating the wave-front tilt. The effect of using broadband light is also quantified.

© 2002 Optical Society of America

OCIS Codes
(010.1080) Atmospheric and oceanic optics : Active or adaptive optics
(010.1330) Atmospheric and oceanic optics : Atmospheric turbulence
(010.7350) Atmospheric and oceanic optics : Wave-front sensing

Citation
Marcos A. van Dam and Richard G. Lane, "Tip/tilt estimation from defocused images," J. Opt. Soc. Am. A 19, 745-752 (2002)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-19-4-745

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