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1. WO2020068824 - OCT SYSTEM CALIBRATION METHOD FOR IMPROVED IMAGE RESOLUTION AND REDUCED IMAGE ARTIFACTS

Publication Number WO/2020/068824
Publication Date 02.04.2020
International Application No. PCT/US2019/052690
International Filing Date 24.09.2019
IPC
G01B 9/02 2006.01
GPHYSICS
01MEASURING; TESTING
BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
9Instruments as specified in the subgroups and characterised by the use of optical measuring means
02Interferometers
G06T 7/50 2017.01
GPHYSICS
06COMPUTING; CALCULATING OR COUNTING
TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
7Image analysis
50Depth or shape recovery
CPC
G01B 9/02004
GPHYSICS
01MEASURING; TESTING
BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
9Instruments as specified in the subgroups and characterised by the use of optical measuring means
02Interferometers ; for determining dimensional properties of, or relations between, measurement objects
02001characterised by manipulating or generating specific radiation properties
02002Frequency variation
02004by using a continuous frequency sweep or scan
G01B 9/02069
GPHYSICS
01MEASURING; TESTING
BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
9Instruments as specified in the subgroups and characterised by the use of optical measuring means
02Interferometers ; for determining dimensional properties of, or relations between, measurement objects
02055characterised by error reduction techniques
02062Active error reduction, i.e. varying with time
02067by electronic control systems, i.e. using feedback acting on optics or light
02069Synchronization of light source or manipulator and detector
G01B 9/02072
GPHYSICS
01MEASURING; TESTING
BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
9Instruments as specified in the subgroups and characterised by the use of optical measuring means
02Interferometers ; for determining dimensional properties of, or relations between, measurement objects
02055characterised by error reduction techniques
0207Error reduction by correction of the measurement signal based on independently determined error sources, e.g. using a reference interferometer
02072by calibration or testing of interferometer
G01B 9/02083
GPHYSICS
01MEASURING; TESTING
BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
9Instruments as specified in the subgroups and characterised by the use of optical measuring means
02Interferometers ; for determining dimensional properties of, or relations between, measurement objects
02083characterised by particular signal processing and presentation
G01B 9/02091
GPHYSICS
01MEASURING; TESTING
BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
9Instruments as specified in the subgroups and characterised by the use of optical measuring means
02Interferometers ; for determining dimensional properties of, or relations between, measurement objects
02091Tomographic low coherence interferometers, e.g. optical coherence tomography
G06T 7/50
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
7Image analysis
50Depth or shape recovery
Applicants
  • AXSUN TECHNOLOGIES, INC. [US]/[US]
Inventors
  • JOHNSON, Bartley C.
  • FORD, Timothy N.
  • WOO, Seungbum
  • ATIA, Walid A.
Agents
  • HOUSTON, J. Grant
Priority Data
62/735,52724.09.2018US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) OCT SYSTEM CALIBRATION METHOD FOR IMPROVED IMAGE RESOLUTION AND REDUCED IMAGE ARTIFACTS
(FR) PROCÉDÉ D'ÉTALONNAGE DE SYSTÈME OCT POUR UNE RÉSOLUTION D'IMAGE AMÉLIORÉE ET DES ARTÉFACTS D'IMAGE RÉDUITS
Abstract
(EN)
Methods and systems for increasing resolution and mitigating sidelobe artifacts on point spread functions in optical coherence tomography systems by addressing (1) the swept source's power variation across the scan band, (2) errors in sampling instances, and (3) window function selection.
(FR)
Des procédés et des systèmes pour augmenter la résolution et atténuer les artéfacts de lobes secondaires sur des fonctions d'étalement de point dans des systèmes de tomographie par cohérence optique par adressage (1) de la variation de puissance de la source balayée à travers la bande de balayage, (2) des erreurs dans des instances d'échantillonnage et (3) de la sélection de fonction de fenêtre.
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