Patent ID: 7576866

Claim:
An optical tomography system comprising a light source which emits light, a light dividing means which divides the light emitted from the light source into measuring light and reference light, a multiplexing means which multiplexes the reflected light from the object when the measuring light emitted is projected onto the object and the reference light, an interference light detecting means which has a spectrometer spectrally dividing interference light of the reflected light which has been multiplexed by the multiplexing means and detects the reference light which has been spectrally divided by the spectrometer, a waveguide means which guides the interference light to the interference light detecting means and a tomographic image obtaining means which obtains a tomographic image of the object on the basis of the interference light detected by the interference light detecting means, wherein the improvement comprises that a polarization setting means which causes the interference light guided by the waveguide means to enter the spectrometer after setting the state of polarization of the interference light guided by the waveguide means to a predetermined state of polarization is provided between the waveguide means and the spectrometer.