Patent ID: 7557928
Filing Date: 2009-07-07
Classification: A61B,G01J

Abstract:
1. An apparatus for obtaining information on an object in a depth direction using optical coherence tomography based on spectral interference, the apparatus comprising: an interference optical system for irradiating measurement light being low coherent light onto the object and synthesizing the measurement light reflected from the object and reference light being low coherent light to interfere; a spectral optical system for dispersing interference light by the interference optical system for every frequency; a photodetector which photo-receives the interference light dispersed by the spectral optical system; light guiding means which guides calibration light for adjusting alignment between the spectral optical system and the photodetector to the spectral optical system; storage means which stores reference spectral information; and adjustment means which adjusts the alignment between the spectral optical system and the photodetector, based on a comparison between spectral information on the calibration light guided to the spectral optical system and photo-received on the photodetector, and the reference spectral information stored in the storage means.