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Apparent violation of the radiant exposure reciprocity law in interline CCDs

AuthorsFerrero, Alejandro ; Campos Acosta, Joaquín ; Pons Aglio, Alicia
Issue Date2006
PublisherOptical Society of America
CitationApplied optics 45: 3991- 3997 (2006)
AbstractWe analyze in detail the apparent violation of the reciprocity law that occurs for an interline CCD array owing to its responsivity that varies with exposure time, and we investigate other parameters having an influence on this variation, such ai the numerical aperture of the system or the illumination wavelength. The variation can be explained from a qualitative point of view by the charge leakage that occurs from the tense region to the register region during readout time. This change of the responsivity can be avoided either by using a synchronized external shutter or by limiting the numerical aperture while keeping relatively high exposure times. A detailed characterization for each particular CCD model must be carried out if it is to be employed in low-uncertainty radiometric measurements. © 2006 Optical Society of America.
Identifiersdoi: 10.1364/AO.45.003991
issn: 0003-6935
Appears in Collections:(IFA) Artículos
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