Optical coherence tomography device

An optical coherence tomography device comprising:

• a light source;
• a mirror device including a movable mirror configured to perform a reciprocating operation;
• a support part configured to support an object;
• a beam splitter configured to generate interfering light by splitting light emitted from the light source into first light and second light and combining the first light reflected by the movable mirror and the second light reflected by the object;
• an optical sensor configured to detect the interfering light generated by the beam splitter;
• and
• a control unit electrically connected to at least the optical sensor, wherein
• the optical sensor includes a plurality of pixels,
• each of the plurality of pixels includes a light receiving part configured to generate electric charge due to incident light, a plurality of transfer gates configured to transfer the electric charge generated in the light receiving part, and a discharge gate configured to discharge the electric charge generated in the light receiving part, and
• the control unit applies an electric signal to the optical sensor so that the plurality of transfer gates are sequentially brought into a charge transfer state in at least three time ranges separated from each other and the discharge gate is brought into a charge discharge state in a time range other than the at least three time ranges for each period of an interferogram signal of the interfering light.