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Applied Optics

Applied Optics


  • Vol. 28, Iss. 6 — Mar. 15, 1989
  • pp: 1178–1192

Centroid position measurements and subpixel sensitivity variations with the MAMA detector

Jeffrey S. Morgan, D. C. Slater, John G. Timothy, and E. B. Jenkins  »View Author Affiliations

Applied Optics, Vol. 28, Issue 6, pp. 1178-1192 (1989)

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Initial measurements of the position sensitivity of a visible-light multi-anode microchannel array (MAMA) detector show that centroid calculations for image spots are accurate to better than 0.04 pixels even with sources that are essentially delta functions at the photocathode. Subpixel sensitivity variations of 10–15% are typically found for pixels in the array. Variations as large as 30% are possible in the worst conditions. These variations limit the photometric accuracy of the detector when very small scale features are observed. The photometric accuracy and the position sensitivity of the detector appear to be limited by cross-coupling effects within the anode array. Initial measurements with more recent designs of the detector show that most or all of this cross-coupling has been eliminated. We will report on the position sensitivity of the newer detectors when they become available for testing.

© 1989 Optical Society of America

Original Manuscript: June 17, 1988
Published: March 15, 1989

Jeffrey S. Morgan, D. C. Slater, John G. Timothy, and E. B. Jenkins, "Centroid position measurements and subpixel sensitivity variations with the MAMA detector," Appl. Opt. 28, 1178-1192 (1989)

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  1. N. Bobroff, “Position Measurement with a Resolution and Noise-Limited Instrument,” Rev. Sci. Instrum. 57, 1152 (1986). [CrossRef]
  2. S. E. Bulau, “Simulations of Various Centroding Algorithms,” Proc. Soc. Photo-Opt. Instrum. Eng. 627, 680 (1986).
  3. G. Gatewood, L. Breakiron, R. Goebel, S. Kipp, J. Russel, J. Stein, “On the Astrometric Detection of Neighboring Planetary Systems, II,” NASAConf.Publ.2124 (1980), pp. 77–118.
  4. G. Gatewood, J. Stein, C. Difatta, K. DeJonge, L. Breakiron, “A Preliminary Look at Astrometric Accuracy as a Function of Photon Counts,” Astron. J. 90, 2397 (1985). [CrossRef]
  5. C. KenKnight, “Limit Posed for Astrometry by Earth’s Atmosphere,” NASAConf.Publ.2124 (1980), pp. 55–60.
  6. J. G. Timothy, R. L. Bybee, “Photon-Counting Array Detectors for Space and Ground-Based Studies at Ultraviolet and Vacuum Ultraviolet (VUV) Wavelengths,” Proc. Soc. Photo-Opt. Instrum. Eng. 279, 129 (1981).
  7. W. E. Spicer, “The Production of Pairs in Semiconductors by Low Energy Electrons,” J. Phys. Chem. Solids 22, 365 (1961). [CrossRef]
  8. J. M. Grant, “Note on the Proximity Focusing of Electron Images,” Proc. IEEE 54, 801 (1966). [CrossRef]
  9. E. H. Eberhardt, “Image Transfer Properties of Proximity Focused Image Tubes,” Appl. Opt. 16, 2127 (1977). [CrossRef] [PubMed]
  10. J. G. Timothy, “Imaging at Soft X-Ray Wavelengths with High-Gain Microchannel Plate Detector Systems,” Proc. Soc. Photo-Opt. Instrum. Eng. 691, 35 (1986).
  11. X. X. Bevington, Data Reduction and Error Analysis for the Physical Sciences (McGraw-Hill, New York, 1969).
  12. S. Brandt, Statistical and Computational Methods in Data Analysis (North-Holland, Amsterdam, 1983).
  13. J. G. Timothy, “Curved-Channel Microchannel Array Plates,” Rev. Sci. Instrum. 52, 1131 (1981). [CrossRef]

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