Investigation of a CCD camera for measurements of optical atmospheric turbulence

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Author
Rall, William Jeffrey
Date
1992-03Advisor
Walters, Donald L.
Second Reader
Davis, D. Scott
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Show full item recordAbstract
Atmospheric turbulence introduces random phase distortions in optical
imaging systems. The development of new laser and imaging systems requires
information on the spatial and temporal distribution of this atmospheric
turbulence. Measurements of the image spread and the jitter induced by the
atmosphere on an optical system provide two techniques to quantify these
phenomena. This thesis evaluates a Spectra Sources Lynxx PC Plus charge
coupled device (CCD) array as an atmospheric turbulence sensor. Data
acquisition and processing programs were written to measure the image spread
of a point source and centroid jitter of a point source imaged through the
atmosphere. Since atmospheric jitter measurements require high image frame
rates on the order of 200 images per second, a large portion of this thesis
involved measurements of the times for the CCD detector, interface board and IBM compatible computer to perform their tasks. Recommendations for higher
performance are presented.
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