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1. WO2011020482 - METHOD AND APPARATUS FOR OPTICAL COHERENCE TOMOGRAPHY

Publication Number WO/2011/020482
Publication Date 24.02.2011
International Application No. PCT/EP2009/006016
International Filing Date 19.08.2009
IPC
A61B 3/12 2006.01
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
3Apparatus for testing the eyes; Instruments for examining the eyes
10Objective types, i.e. instruments for examining the eyes independent of the patients perceptions or reactions
12for looking at the eye fundus, e.g. ophthalmoscopes
G01N 21/47 2006.01
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
21Investigating or analysing materials by the use of optical means, i.e. using infra-red, visible or ultra-violet light
17Systems in which incident light is modified in accordance with the properties of the material investigated
47Scattering, i.e. diffuse reflection
CPC
A61B 3/102
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
3Apparatus for testing the eyes; Instruments for examining the eyes
10Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions
102for optical coherence tomography [OCT]
G01N 21/4795
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
21Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
17Systems in which incident light is modified in accordance with the properties of the material investigated
47Scattering, i.e. diffuse reflection
4795spatially resolved investigating of object in scattering medium
Applicants
  • OPTOPOL TECHNOLOGY S.A. [PL]/[PL] (AllExceptUS)
  • BAJRASZEWSKI, Tomasz [PL]/[PL] (UsOnly)
  • TARGOWSKI, Piotr [PL]/[PL] (UsOnly)
  • DALASINSKI, Pawel [PL]/[PL] (UsOnly)
  • SZKULMOWSKI, Maciej [PL]/[PL] (UsOnly)
  • WOJDAS, Pawel [PL]/[PL] (UsOnly)
Inventors
  • BAJRASZEWSKI, Tomasz
  • TARGOWSKI, Piotr
  • DALASINSKI, Pawel
  • SZKULMOWSKI, Maciej
  • WOJDAS, Pawel
Agents
  • GLAWE, DELFS, MOLL
Priority Data
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) METHOD AND APPARATUS FOR OPTICAL COHERENCE TOMOGRAPHY
(FR) PROCÉDÉ ET APPAREIL POUR TOMOGRAPHIE PAR COHÉRENCE OPTIQUE
Abstract
(EN)
The invention relates to optical coherence tomography (OCT), more specifically to spectral optical coherence tomography (SOCT). The invention deals with problem of artefacts occurring in certain scan positions due to sharp increases of reflection by the object under investigation. It solves this problem by using an extra intensity sensor located at an output for non-dispersed light of the dispersive element used for spectral analysis, e. g. in the zero order of a diffraction grating, and using the signal of this sensor for the modification of the interferometric data.
(FR)
L'invention se rapporte à la tomographie par cohérence optique (OCT), plus spécifiquement à la tomographie par cohérence optique spectrale (SOCT). L'invention traite du problème des artefacts apparaissant dans certaines positions de balayage en raison d'augmentations marquées de réflexion par l'objet examiné. Elle résout ce problème en utilisant un capteur supplémentaire d'intensité situé à une sortie destinée à la lumière non dispersée de l'élément dispersant utilisé pour l'analyse spectrale, par exemple dans l'ordre zéro d'un réseau de diffraction, et en utilisant le signal de ce capteur pour la modification des données interférométriques.
Also published as
PL398359
PLP.398359
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