Interference apparatus and method and probe

A - Human Necessities – 61 – B

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A61B 5/00 (2006.01)

Patent

CA 2588697

An optical interference apparatus for carrying out Fourier domain optical coherence tomography including means to provide multiple beams whereby interferograms are recorded simultaneously for a plurality of different focal depths within a substance to be examined, each interferogram being provided by one of the multiple beams. Means is provided for combining images derived from said interferograms for a plurality of different focal depths, whereby a single image may be constructed with an increased depth of field. The axial spacing of the foci is calculated to take into account the Rayleigh range of the focal waist in the substance to be examined.

L'invention concerne un dispositif optique d'interférences destiné à effectuer une tomographie par cohérence optique dans le domaine de Fourier incluant un moyen destiné à fournir des faisceaux multiples, grâce à quoi des interférogrammes sont simultanément enregistrés pour une pluralité de profondeurs focales différentes à l'intérieur d'une substance à examiner, chaque interférogramme étant fourni par l'un des multiples faisceaux. Un moyen est prévu pour combiner les images dérivées desdits interférogrammes pour la pluralité de profondeurs focales différentes, grâce à quoi une seule image peut être construite, comportant une profondeur de champ accrue. L'espacement axial des foyers est calculé pour prendre en compte la plage de Rayleigh du rétrécissement focal dans la substance à examiner.

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