Full-field OCT system using wavelength-tunable laser and three-dimensional image correction method
AssigneesKoh Young Technology Inc., Industry-University Cooperation Foundation Hanyang University
InventorsHyun Ki Lee, Hong Ki Yoo, Chang Soo Kim, Hyeong Soo Nam
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Abstract
The present disclosure provides a full-field OCT system using a wavelength-tunable laser, which can observe peaks of a short-time A-line profile corresponding to each time point at which interference images of an object to be measured are acquired, so as to measure a depth direction movement of the object to be measured, and can correct the phases of interference signals on the basis of the measured depth direction movement, so as to generate an OCT image which is compensated for the depth direction movement.
Claims9
A full-field Optical Coherence Tomography (OCT) system comprising an image processor that determines depth-directional movement of a measurement target and compensates the depth-directional movement of the measurement target based on a plurality of interference images that are formed by interference between reference light, that is created when a laser beam having wavelengths corresponding to each wave number is reflected by a reference mirror, and reflective light that is created when the laser beam is reflected by the measurement target,
- wherein the image processor is configured to:
- obtain interference intensities corresponding to each wave number for a specific point on the measurement target, from interference images corresponding to each wave number included in each wave number domain among the plurality of interference images;
- obtain short-time A-line profiles corresponding to each wave number domain based on the obtained interference intensities;
- obtain depth values corresponding to each wave number domain from each short-time A-line profile;
- and
- determine the depth-directional movement of the measurement target based on changes of the obtained depth values.
A method of determining depth-directional movement of a measurement target and compensating for the depth-directional movement of the measurement target in a full-field OCT system, the method comprising:
- receiving, by an image processor, a plurality of interference images that are formed by interference between reference light that is created when a laser beam having wavelengths corresponding to each wave number is reflected by a reference mirror and reflective light that is created when the laser beam is reflected by the measurement target;
- obtaining, by the image processor, interference intensities corresponding to each wave number for a specific point on the measurement target from interference images corresponding to each wave number included in each wave number domain among the plurality of interference images;
- obtaining, by the image processor, short-time A-line profiles corresponding to each wave number domain based on the obtained interference intensities;
- obtaining, by the image processor, depth values corresponding to each wave number domain from the short-time A-line profiles;
- and
- determining, by the image processor, the depth-directional movement of the measurement target based on changes of the obtained depth values.
Dependencies are inferred from the claim text.