Optical Coherence Tomography Device

A method of operating an optical coherence tomography (OCT) device for an endoscopic measuring system, the OCT device comprising:

• at least one light source;
• at least one cascaded interferometer arrangement having at least a first interferometer configured to receive light emitted by the at least one light source and at least a second interferometer, the at least the second interferometer arranged behind the at least the first interferometer with respect to an optical path of the OCT device;
• at least one image sensor;
• and
• at least one image fiber arranged between the at least one cascaded interferometer arrangement and the at least one image sensor with respect to the optical path of the OCT device, wherein the at least one image fiber is configured to receive at least one interferometric image output by the at least the second interferometer and to transmit the interferometric image towards the at least one image sensor for detection of the interferometric image by means of the at least one image sensor,
• the method comprising:
• outputting, by means of a control unit and towards at least one actuator of the OCT device, a control signal for varying an optical offset between a primary beam and a first reference beam as output by the at least the first interferometer of the OCT device;
• receiving, by means of the control unit and from the at least one image sensor of the OCT device, image data of at least one interferometric image for each of various optical offsets;
• analyzing, by the control unit, the image data of the interferometric images to determine a variable light intensity caused by variable optical interference in accordance with the various optical offsets, and
• determining, by means of the control unit, at least one depth of at least one object in the measuring field of the OCT device based on the determined variable light intensity.