US 12,213,763 B2
Optical coherence tomography (OCT) apparatus and method for controlling an optical coherence tomography apparatus
Shigeru Nakamura, Tokyo (JP)
Assigned to NEC CORPORATION, Tokyo (JP)
Appl. No. 17/908,994
Filed by NEC Corporation, Tokyo (JP)
PCT Filed Mar. 25, 2020, PCT No. PCT/JP2020/013452
§ 371(c)(1), (2) Date Sep. 2, 2022,
PCT Pub. No. WO2021/192117, PCT Pub. Date Sep. 30, 2021.
Prior Publication US 2023/0102868 A1, Mar. 30, 2023
Int. Cl. G01B 9/02 (2022.01); A61B 3/10 (2006.01); A61B 5/00 (2006.01)
CPC A61B 5/0066 (2013.01) [A61B 3/102 (2013.01); G01B 9/02 (2013.01)] 12 Claims
OG exemplary drawing
 
1. An optical coherence tomography (OCT) apparatus, comprising:
a wavelength-swept laser light source;
an optical branching device configured to branch light emitted from the wavelength-swept laser light source into object light and reference light; and
an irradiation optical system configured to irradiate different positions on a surface of a measurement object with the object light output from the optical branching device to scan a predetermined range,
wherein the optical coherence tomography (OCT) apparatus is configured to perform:
generating information on a change in an intensity ratio between interference light beams generated from the object light emitted to the measurement object and then scattered from the measurement object and the reference light;
acquiring structure data in a depth direction of the measurement object, based on the information on the change in the intensity ratio between the interference light beams, and
determining whether the measurement object is irradiated with the object light based on the generated information and setting an irradiation position of the object light controlled by the irradiation optical system.