Device and method for detecting particles and method for manufacturing same

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 11592384
APP PUB NO 20210181083A1
SERIAL NO

17247352

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A device for detecting (D) at least one predetermined particle (P) includes an interferometric element (EI) arranged so as to be illuminated by an incident radiation (Lin) and comprising at least one so-called thin layer (CM) disposed on top of a so-called substrate layer (Sub), the particle being attached to a surface (Sm) of the thin layer, the interferometric element (EI) forming a Fabry-Pérot cavity with or without attached particle P; a matrix sensor (Det) adapted to detect an image comprising a first portion (P1) deriving from the detection of the incident radiation transmitted (LTBG) by the interferometric element alone and a second portion (P2) deriving from the detection of the incident radiation transmitted (LTP) by the interferometric element and any particle (O, P) attached to a surface (Sm) of the thin layer; a processor (UT) linked to the sensor and configured: to calculate, as a function of wavelengths of the incident radiation λi i∈[1,m], the variation of intensity of at least one first pixel of the first portion, called first variation (FBG) and of at least one second pixel of the second portion, called second variation (FP), to determine a trend, as a function of the wavelengths of the incident radiation λi i∈[1,m], of a phase shift ϕi between the first variation and the second variation; to detect the attached particle when the phase shift ϕi is not constant as a function of the wavelengths of the incident radiation λi i∈[1,m].

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Patent Owner(s)

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COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVESPARIS

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Dupoy, Mathieu Grenoble, FR 18 46
Frey, Laurent Grenoble, FR 38 290
Gidon, Serge Grenoble, FR 40 205

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