Devices and methods for optical imaging by means of off-axis digital holography

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United States of America Patent

PATENT NO 11099522
APP PUB NO 20200233378A1
SERIAL NO

16499770

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Abstract

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According to one aspect, the invention concerns an optical imaging device (20) for an object (OBJ) by off-axis holography comprising a light source (21) adapted for emitting an illumination wave (EI) on the object, in transmission or reflection, and an assembly formed by one or more thick Bragg gratings (22) for receiving a wave (EO) coming from the object thus illuminated and for deflecting a first component (ER) of the wave coming from the object, called the reference wave, and to allow a second component (ES) of the wave coming from the object, called the signal wave, to pass without deflection in such a way that the deflected reference wave presents predetermined deflection angles with respect to the non-deflected signal wave defined in two perpendicular planes. The imaging device according to the first aspect further comprises a two-dimensional detection device (23) for acquiring an interferogram resulting from the interference between said deflected reference wave and said signal wave and a computing unit for determining, from said interferogram, an amplitude and phase distribution of the signal wave in the plane of the object (hologram).

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Patent Owner(s)

Patent OwnerAddress
CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE (CNRS)3 RUE MICHEL ANGE PARIS 75016
ECOLE SUPERIEURE DE PHYSIQUE ET DE CHIMIE INDUSTRIELLES DE LA VILLE DE PARIS10 RUE VAUQUELIN PARIS 05 75005

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Atlan, Michael Paris, FR 4 8
Huignard, Jean-Pierre Paris, FR 87 1907

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