14 March 1995 First-order image correction using a charge injection device (CID) array
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Abstract
Turbulence is known to be the factor limiting resolution in long exposure images taken through the earth's atmosphere. The degradation is such that the images obtained can be described by the classical Seidel aberrations. Adaptive optics can be used to remove these aberrations to the maximum extent possible with corrective optics and a reference object. Full compensation systems are preferred, but are costly and complex. Significant improvement in image quality can be obtained by removing only the lowest order aberration, that is random tilts. These 'partial adaptive systems' have been used to produce high quality images in the visible and infrared. For most systems, determining the orientation of the incoming wavefront has required two separate imagers; one for determining wavefront variations and another for integration of photons in the field of interest. This has resulted in a need to split the incoming light with beamsplitters or choppers. In this paper, a new method of tracking tilts with only one focal plane array has been devised. Experiments with a Charge Injection Device (CID) used in conjunction with tip-tilt mirrors has been shown to be capable of first order motion correction. Limitations of this overall system as well as results and analysis from experiments will be presented.
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Brian S. Backer, Zoran Ninkov, William Robert Cirillo, "First-order image correction using a charge injection device (CID) array", Proc. SPIE 2416, Cameras and Systems for Electronic Photography and Scientific Imaging, (14 March 1995); doi: 10.1117/12.204821; https://doi.org/10.1117/12.204821
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