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CMOS pixels crosstalk mapping and its influence on measurements accuracy for space applications

Estribeau, Magali and Magnan, Pierre CMOS pixels crosstalk mapping and its influence on measurements accuracy for space applications. (2005) In: SPIE Remote Sensing 2005, 19 Sept 2005, Brugge, Belgium .

(Document in English)

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Due to different local intra-pixel sensitivity and crosstalk between neighboring pixels, the Pixel Response Function of detectors (PRF - signal of the pixel as a function of a point source position) is generally non-uniform. This may causes problems in space application such as aperture photometry and astrometry (centroiding). For imaging applications, an important crosstalk yields to a loss of resolution, i.e. a poor image quality, commonly quantified by the Modulation Transfer Function (MTF). So, crosstalk study is of primary importance for our applications. A dedicated test chip (using a technology optimized for imaging applications) has been developed in order to get both MTF data and influence of the various areas of the pixel to its own response and the one of its neighbors. The results obtained with pixel kernels and direct MTF measurements, performed on the same chip at different wavelengths, are analyzed and compared in order to correlate them. So it is possible to draw conclusions -that can be applied at the design level - allowing to get a better MTF and to minimize errors on aperture photometry and centroiding computation.

Item Type:Conference or Workshop Item (Paper)
Additional Information:Proceedings of SPIE -- Volume 5978 Sensors, Systems, and Next-Generation Satellites IX doi:10.1117/12.628955
Audience (conference):International conference proceedings
Uncontrolled Keywords:
Institution:Université de Toulouse > Institut Supérieur de l'Aéronautique et de l'Espace - ISAE-SUPAERO (FRANCE)
Laboratory name:
Département d'Electronique, Optronique et Signal - DEOS (Toulouse, France) - Conception d’Imageurs Matriciels Intégrés - CIMI
Deposited On:14 May 2008 10:50

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