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

[PDF] Pozo_SpeckleMethod.pdf (166.1Ko)
Identificadores
URI: http://hdl.handle.net/10481/32717
DOI: 10.1364/OE.14.005928
ISSN: 1094-4087
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Auteur
Pozo Molina, Antonio Manuel; Ferrero, A.; Rubiño López, Antonio Manuel; Campos Acosta, Joaquín; Pons, Alicia
Editorial
Optical Society of America
Materia
CCD
 
Charge-coupled device
 
Modulation transfer function
 
Speckle imaging
 
Date
2006
Referencia bibliográfica
Pozo, A.M.; et al. Improvements for determining the modulation transfer function of charge-coupled devices by the speckle method. Optics Express, 14(13): 5928-5936 (2006). [http://hdl.handle.net/10481/32717]
Patrocinador
The authors express their appreciation to the Ministerio de Ciencia y Tecnología for financing projects FIS2004-06465-C02-01 and FIS2004-06465-C02-02.
Résumé
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%.
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