Commissariat a L'energie Atomique Et Aux Energies Alternatives

Sebastien Becker

Cedric Allier

Mathieu Dupoy

Jean-Guillaume Coutard

Salim Boutami

Anthony Lefebvre

Antoine Hamelin

A device for observing a biological sample is provided, including: a light source to emit a light beam at a wavelength between 1 &#x3bc;m and 20 &#x3bc;m; an image sensor including pixels defining a detection plane; a holder to hold the sample between the source and the sensor at a distance from the plane smaller than 1 mm, such that the source is configured to illuminate an area of the sample larger than 1 mm, no image-forming optics are placed between the sample and the sensor, and the sensor is configured to acquire an image corresponding to an area of the sample larger than 1 mmand representative of an absorption of the beam by the sample at the wavelength; and a processor to determine a map of an amount of analyte in the sample, based on the image acquired by the sensor, the analyte absorbing light at the wavelength.

Device for observing a biological sample in the infrared range

A method is provided for observing a biological sample between a light source and a pixelated image sensor, the light emitting an incident light beam, which propagates to the sample along a propagation axis and at an emission wavelength, the method including: illuminating the sample with the source; and acquiring an image of the sample with the sensor, no image-forming optic being placed between the sample and the sensor, the sample absorbing some of the beam, such that the acquired image is representative of an absorption of the beam by the sample at the emission wavelength, the source illuminates an area of the sample larger than 1 mm, the image acquired of the sample by the sensor corresponds to an area of sample larger than 1 mm, and pixels of the sensor define a detection plane, the sample being placed at a distance from the plane smaller than 1 mm.

Method for observing a sample in the infrared range

The invention concerns a detection device for detecting electromagnetic radiation, comprising a substrate, an array of thermal detectors, each thermal detector comprising a suspended absorbent membrane and a reflective layer. The detection device comprises at least one opaque vertical wall, arranged on the substrate and extending longitudinally between two adjacent thermal detectors, and produced from a material that is opaque to the electromagnetic radiation to be detected.

Device for detecting electromagnetic radiation with reduced crosstalk

A method for optimizing values of n detection wavelengths of an optical gas sensor configured to detect n different gases is provided, including: a) calculating a value of a determinant of an absorptivity matrix &#x3b5; whose coefficients represent spectral absorptivity of each of the n different gases at the n detection wavelengths, the calculating being repeated several times, each time modifying at least one of said n detection wavelengths so the values of said n detection wavelengths are comprised within a range of values for which the spectral absorptivity of at least one of the n different gases is non-zero; and b) determining the values of said n detection wavelengths for which the calculated value of the determinant of the absorptivity matrix &#x3b5; corresponds to a maximum calculated value amongst a set of values calculated in step a).

Method for optimisation of detection wavelengths for multi-gas detection

Infrared detection device comprising at least one first bolometer able to detect at least a part of infrared radiation intended to be received by the infrared detection device, and a reading and compensation circuit of a first electrical signal intended to be outputted by the first bolometer, with the reading and compensation circuit comprising at least:

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Voiron, France

Sebastien Becker