Optical Coherence Tomography Device and Measuring Head

An optical coherence tomography device, comprising:

• a light source;
• a light splitting section that splits light source light emitted from the light source into reference light with which a reference mirror is irradiated and measuring light with which a sample to be measured is irradiated;
• an interfering section that allows the measuring light reflected from the sample to interfere with the reference light reflected from the reference mirror to generate interference light;
• a photodetectiong section that measures the interference light;
• an operating section that obtains information on the sample based on the interference light measured by the photodetectiong section;
• an optical fiber through which the measuring light passes;
• and
• a measuring head that is provided at a tip end of the optical fiber and guides the measuring light from the optical fiber to the sample,
• wherein the measuring head includes at least one optical axis changing section that changes a direction of an optical axis of the measuring light, and
• the optical axis changing section is attachable/detachable with respect to the measuring head.