1 April 1993 Speckle imaging detector optimization and comparison
Author Affiliations +
Optical Engineering, 32(4), (1993). doi:10.1117/12.61195
Abstract
Speckle imaging is a statistical technique for achieving near-diffraction-limited imagery of astronomical objects with ground-based telescopes. The performance of this statistical postdetection processing technique is critically dependent on the signal-to-noise ratio (SNR) of the estimators used for various average spectra, which can be a strong function of detector characteristics. We discuss techniques for maximizing SNR under low-light conditions where so-called "read noise" becomes a factor in CCD detectors, and we derive an optimal exposure time for CCD detection when total viewing time limits the SNR. We also show that a properly optimized CCD can outperform a shot-noise-limited detector, in terms of the SNR, at much lower light levels than without optimization.
David W. Tyler, Charles L. Matson, "Speckle imaging detector optimization and comparison," Optical Engineering 32(4), (1 April 1993). https://doi.org/10.1117/12.61195
JOURNAL ARTICLE
6 PAGES


SHARE
Back to Top