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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 14, Iss. 13 — Jun. 26, 2006
  • pp: 5928–5936

Improvements for determining the modulation transfer function of charge-coupled devices by the speckle method

A. M. Pozo, A. Ferrero, M. Rubiño, J. Campos, and A. Pons  »View Author Affiliations


Optics Express, Vol. 14, Issue 13, pp. 5928-5936 (2006)
http://dx.doi.org/10.1364/OE.14.005928


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Abstract

We present and evaluate two corrections applicable in determining the modulation transfer function (MTF) of a charge-coupled device (CCD) by the speckle method that minimize its uncertainty: one for the low frequency region and another for the high frequency region. The correction at the low-spatial-frequency region enables attenuation of the high power-spectral-density values that arise from the field and CCD response non-uniformities. In the high-spatial-frequency region the results show that the distance between the CCD and the aperture is critical and significantly influences the MTF; a variation of 1 mm in the distance can cause a root-mean-square error in the MTF higher than 10%. We propose a simple correction that minimizes the experimental error committed in positioning the CCD and that diminishes the error to 0.43%.

© 2006 Optical Society of America

OCIS Codes
(040.1520) Detectors : CCD, charge-coupled device
(110.4100) Imaging systems : Modulation transfer function
(110.6150) Imaging systems : Speckle imaging

ToC Category:
Imaging Systems

History
Original Manuscript: April 11, 2006
Revised Manuscript: May 24, 2006
Manuscript Accepted: June 19, 2006
Published: June 26, 2006

Citation
A. M. Pozo, A. Ferrero, M. Rubiño, J. Campos, and A. Pons, "Improvements for determining the modulation transfer function of charge-coupled devices by the speckle method," Opt. Express 14, 5928-5936 (2006)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-14-13-5928


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References

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