Patent ID: 7542145

Claim:
An optical tomography method in which light emitted from a light source is divided into measuring light and reference light, the measuring light is projected onto an object of measurement, the reflected light from the object and the reference light are superposed, interference light of the reflected light and reference light which have been superposed is detected, intensities of the reflected light in a plurality of positions in the direction of depth of the object of measurement are detected on the basis of the frequency and the intensity of the detected interference light, and a tomographic image of the object is obtained on the basis of the intensity of the reflected light in each position in the direction of depth, wherein the improvement comprises the steps of measuring spectral components of the measuring light, obtaining a compensating signal by removing the spectral components of the measuring light from an interference signal obtained by detection of the interference light, applying a Gaussian transform to the compensating signal; and providing the Gaussian transformed compensating signal for detection of the intensities of the reflected light.