US 12,265,026 B2
Optical coherence tomography device, optical coherence tomography method, and non-transitory computer readable medium storingin structions therefore
Yoshiaki Yasuno, Tsukuba (JP); Daisuke Oida, Tsukuba (JP); and Kensuke Oikawa, Tsukuba (JP)
Assigned to University of Tsukuba, Tsukuba (JP)
Appl. No. 17/776,178
Filed by University of Tsukuba, Tsukuba (JP)
PCT Filed Nov. 13, 2020, PCT No. PCT/JP2020/042459
§ 371(c)(1), (2) Date May 11, 2022,
PCT Pub. No. WO2021/095852, PCT Pub. Date May 20, 2021.
Claims priority of application No. 2019-206506 (JP), filed on Nov. 14, 2019.
Prior Publication US 2022/0390368 A1, Dec. 8, 2022
Int. Cl. G01N 21/45 (2006.01); G01B 9/02091 (2022.01)
CPC G01N 21/455 (2013.01) [G01B 9/02091 (2013.01)] 10 Claims
OG exemplary drawing
 
1. An optical coherence tomography (OCT) device comprising:
a detection signal acquisition circuitry configured to acquire an OCT signal;
a phase gradient calculation circuitry configured to calculate a phase gradient on a plane intersecting an irradiation direction of light corresponding to the OCT signal indicating a state of a sample for each of sample points arranged on the plane;
a bulk phase error calculation circuitry configured to integrate, for each of plurality of paths from an origin that is a sample point where a bulk phase error is determined to a destination that is a sample point where the bulk phase error is not determined, the phase gradient for each of the sample points along each of the plurality of corresponding paths to calculate a path specific phase error at the destination, and
combine the path specific phase errors among the plurality of corresponding paths to determine the bulk phase error at the destination;
a bulk error correction circuitry configured to correct a phase of the OCT signal based on the bulk phase error to obtain a corrected OCT signal;
an image processing circuitry configured to generate image data based on the corrected OCT signal, and
output the image data to a display unit.