US 12,329,454 B2
Binocular optical coherence tomography imaging system
Lijo Varughese Chacko, Dunfermline (GB); and Margaret Catherine Normand, Dunfermline (GB)
Assigned to OPTOS PLC, Dunfermline (GB)
Filed by OPTOS PLC, Dunfermline (GB)
Filed on Jun. 5, 2021, as Appl. No. 17/339,980.
Claims priority of application No. 20186520 (EP), filed on Jul. 17, 2020.
Prior Publication US 2022/0015624 A1, Jan. 20, 2022
Int. Cl. A61B 3/10 (2006.01); A61B 3/00 (2006.01); G01B 9/02091 (2022.01)
CPC A61B 3/102 (2013.01) [A61B 3/0058 (2013.01); A61B 3/1025 (2013.01); G01B 9/02091 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A binocular optical coherence tomography, OCT, imaging system for simultaneously imaging a region of a first eye of a subject and a region of a second eye of the subject, the binocular OCT imaging system comprising:
a swept light source arranged to generate light of a wavelength which varies over time;
an interferometer comprising:
a reference arm;
a first sample arm comprising a first scanning module arranged to scan a first beam of the light across the region of the first eye and receive first reflected light that has been reflected by the region of the first eye as a result of the first beam being scanned across the region of the first eye by the first scanning module;
a second sample arm comprising a second scanning module arranged to scan a second beam of the light across the region of the second eye simultaneously with the scanning of the first beam across the region of the first eye by the first scanning module, the second scanning module being further arranged to receive second reflected light that has been reflected by the region of the second eye as a result of the second beam being scanned across the region of the second eye by the second scanning module;
a photodetector arranged to receive the first reflected light, the second reflected light, and reference light being light from the swept light source that is propagating along the reference arm, and generate an electrical signal(S) having frequency components that comprise first frequency components arising from an interference between the first reflected light and the reference light, and second frequency components arising from an interference between the second reflected light and the reference light, the first frequency components spanning a first frequency band and the second frequency components spanning a second frequency band, wherein a difference between an optical path length of the first sample arm and an optical path length of the second sample arm is such that at least a portion of the first frequency band does not overlap with the second frequency band, and at least a portion of the second frequency band does not overlap with the first frequency band;
a filter module arranged to filter the electrical signal(S) by passing at least some of the first frequency components in the portion of the first frequency band that does not overlap with the second frequency band and passing at least some of the second frequency components in the portion of the second frequency band that does not overlap with the first frequency band;
an OCT image data generating module arranged to generate, based on the at least some of the first frequency components passed by the filter module, first OCT image data representing the image of the region of the first eye, and to generate, based on the at least some of the second frequency components passed by the filter module, second OCT image data representing the image of the region of the second eye.