US 12,137,976 B2
Optical coherence tomography instrument and alignment method
Praveen Ashok, Dunfermline (GB); and David Evans, Dunfermline (GB)
Assigned to OPTOS PLC, Dunfermline (GB)
Filed by OPTOS PLC, Dunfermline (GB)
Filed on Mar. 13, 2021, as Appl. No. 17/200,800.
Prior Publication US 2022/0287559 A1, Sep. 15, 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 3/0008 (2013.01); A61B 3/0025 (2013.01); A61B 3/0041 (2013.01); G01B 9/02091 (2013.01)] 58 Claims
OG exemplary drawing
 
1. An ophthalmic optical coherence tomography instrument comprising:
a light source arranged to generate measurement light;
a coupler arranged to split the measurement light into reference light and sample light;
a sample arm, comprising a front-end optical system, and arranged to direct the sample light towards a subject position and to receive reflected sample light from the subject position;
a reference arm, comprising a return optical system, and arranged to receive the reference light and return the reference light to interfere with the reflected sample light; and
a detector arranged to detect an interferogram of the reflected sample light and the returned reference light,
wherein the front-end optical system comprises a scanner defining an apparent point source for scanning the sample light across the subject position and an objective having a posterior imaging configuration to project the apparent point source onto a pivot point on a pivot plane between the objective and the subject position, and
wherein the objective is settable between the posterior imaging configuration for scanning the sample light across a retina of an eye at the subject position and an anterior imaging configuration for scanning the sample light across the pivot plane.