Scintillation-induced jitter of projected light with centroid trackers
JOSA A, Vol. 26, Issue 2, pp. 313-316 (2009)
http://dx.doi.org/10.1364/JOSAA.26.000313
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Abstract
When light radiating from a distant object passes through extended turbulence, the light is scintillated. Such scintillated light may be received by an optical system and passed to a camera in the focal plane, and used to track an object. Such trackers often use centroid trackers. Then a laser or other light may be projected back toward the object, steered by the centroid measured on the tracker. The presence of scintillation on the tracker return will cause a jitter error in the pointing of projected light, if the projected light’s intensity differs from that of the incoming scintillation pattern. This error is caused by a lack of full-field conjugation of the tilt component of the received return. This error is considered, for horizontal path conditions, as a difference between centroid tilt and gradient tilt. The estimated error is typically not large, and is estimated by both simulation and analytic means, and these are found to agree for conditions of interest. The possibility of means for correction of this error is discussed briefly.
© 2009 Optical Society of America
OCIS Codes
(010.1300) Atmospheric and oceanic optics : Atmospheric propagation
(010.1330) Atmospheric and oceanic optics : Atmospheric turbulence
(010.3310) Atmospheric and oceanic optics : Laser beam transmission
ToC Category:
Atmospheric and Oceanic Optics
History
Original Manuscript: August 28, 2008
Revised Manuscript: November 4, 2008
Manuscript Accepted: December 1, 2008
Published: January 28, 2009
Citation
Richard B. Holmes, "Scintillation-induced jitter of projected light with centroid trackers," J. Opt. Soc. Am. A 26, 313-316 (2009)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-26-2-313
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