Commissariat &#xc0; L'&#xc9;nergie Atomique Et Aux &#xc9;nergies Alternatives

Lynred

Ulis

Alexia Gorecki

Jean Rinkel

Nicolas Boudou

Andrea Brambilla

Alexandra Potop

Andréa Brambilla

A method is provided for characterizing a sample, by estimating a plurality of characteristic thicknesses, each being associated with a calibration material. The method includes acquiring an energy spectrum transmitted through the sample, located in an X and/or gamma spectral band; for each spectrum of a plurality of calibration spectra, calculating a likelihood from said calibration spectrum, and from the spectrum transmitted through the sample, each calibration spectrum corresponding to the energy spectrum transmitted through a stack of gauge blocks, each formed of a known thickness of a calibration material; and estimating the characteristic thicknesses associated with the sample according to the criterion of maximum likelihood.

Characterizing a sample by material basis decomposition

An image sensor includes on a support a plurality of first pixels and a plurality of second pixels intended to detect an infrared radiation emitted by an element of a scene. Each of the pixels includes a bolometric membrane suspended above a reflector covering the support, wherein the reflector of each of the first pixels is covered with a first dielectric layer, and the reflector of each of the second pixels is covered with a second dielectric layer differing from the first dielectric layer by its optical properties.

Infrared image sensor

A method for characterizing a sample, by estimating a plurality of characteristic thicknesses, each being associated with a calibration material, including acquiring an energy spectrum (S) transmitted through this sample, located in an X and/or gamma spectral band; for each spectrum of a plurality of calibration spectra (s(L; L)) calculating a likelihood from said calibration spectrum (S(L; L)), and from the spectrum transmitted through the sample (S), each calibration spectrum (S(L; L)) corresponding to the energy spectrum transmitted through a stack of gauge blocks, each formed of a known thickness of a calibration material; estimating the characteristic thicknesses (L, L) associated with the sample according to the criterion of maximum likelihood.

Growing community of inventors

Grenoble, France

Alexia Gorecki