Patent ID: 8441648

Claim:
A calibration jig for calibrating an optical tomographic imaging apparatus, the apparatus including an optical probe and an attachment section for optically coupling the optical probe to the apparatus in a removable manner, the apparatus acquiring a tomographic image of a subject to be measured by: emitting light; dividing the emitted light into reference light and measurement light; emitting the measurement light from an emitting section of the attachment section; guiding the measurement light through the optical probe and applying the measurement light to the subject to be measured; combining the reference light with reflected light, the reflected light being reflected from the subject to be measured and guided through the optical probe; detecting interference light of the combined reference light and reflected light as an interference signal; and acquiring the tomographic image using the interference signal, the calibration jig comprising: a holding member removably attachable to the attachment section; and a reflective surface held by the holding member, the reflective surface reflecting the measurement light emitted from the emitting section and directing the reflected light back to the emitting section, wherein the attachment section is for optically coupling the optical probe to the apparatus, and wherein the optical probe of the optical tomographic imaging apparatus is covered with a sheath, the sheath transmits the measurement light to be applied to the subject to be measured and transmits the reflected light to be guided through the optical probe, the calibration jig comprises a light transmitting member disposed between the emitting section and the reflective surface, the light transmitting member transmits the measurement light and the reflected light reflected from the reflective surface, and the light transmitting member generates same dispersion as dispersion generated when the measurement light and the reflected light reflected from the subject to be measured transmit through the sheath.