Use of a moiré deflectometer on a telescope for atmospheric turbulence measurements
Optics Letters, Vol. 35, Issue 9, pp. 1470-1472 (2010)
http://dx.doi.org/10.1364/OL.35.001470
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Abstract
An instrument has been built for the study of the atmospheric turbulence by measuring the fluctuation of the angle of arrival across a telescope aperture using moiré deflectometry. A slightly divergent laser beam passes through a turbulent ground level atmosphere and enters the telescope aperture. The laser beam is recollimated behind the telescope’s focal point by means of a collimator. The collimated beam passes through a moiré deflectometer. The fluctuating self-image of the first grating is formed on the second grating of the moiré deflectometer and fluctuating moiré fringes are formed. Using moiré fringe fluctuations we have calculated the fluctuations of the angle of arrival, the Fried’s parameter
© 2010 Optical Society of America
OCIS Codes
(010.1330) Atmospheric and oceanic optics : Atmospheric turbulence
(100.2650) Image processing : Fringe analysis
(110.6760) Imaging systems : Talbot and self-imaging effects
(110.6770) Imaging systems : Telescopes
(120.4120) Instrumentation, measurement, and metrology : Moire' techniques
ToC Category:
Imaging Systems
History
Original Manuscript: January 19, 2010
Revised Manuscript: March 7, 2010
Manuscript Accepted: March 16, 2010
Published: April 30, 2010
Citation
Saifollah Rasouli, "Use of a moiré deflectometer on a telescope for atmospheric turbulence measurements," Opt. Lett. 35, 1470-1472 (2010)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-35-9-1470
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