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Device for obtaining the image and/or spectra of electron energy loss



Statut des brevets

French patent application FR0408633 filed on April 8th, 2004 entitled: “Device for obtaining the image and/or spectra of electron energy loss”


Marcel TENCE

Statut commercial

Research agreement, non exclusive licenses


Centre d’Elaboration de Matériaux et d’Etudes Structurales (CEMES), (UPR8011), Toulouse, France,



The inventive device for obtaining the electron energy loss image and/or spectra comprises an image sensor, a control for at least two deflectors for alternately exposing at least two photosensitive parts of the image sensor, sensor reading means for generating the representative signal of an image captured by each photosensitive part of the image sensor, means for synchronising the deflector and said reading means for successively controlling the exposition of said photosensitive part and the reading of the other photosensitive part for each photosensitive part and means for combining the two image parts in such a way that a spectrum is formed.


The controller permits to obtain the images in multimode, i.e. high speed mode and high resolution mode, and to rapidly obtain the spectra of electron energy loss in a dynamic manner, thus improving energy resolution of the obtained spectra, while reducing the noise of the device.


For obtaining images and/or spectra of electron energy loss for an electron microscope used as an investigation tool in laboratories for evolution of themes related to the study of materials in nanometric scale.

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