Patent ID: 7589842
Filing Date: 2009-09-15
Classification: G01B

Abstract:
1. An optical tomograph, comprising: a light source unit for emitting a light beam; a light dividing section, for dividing the light beam emitted from the light source unit into a measuring light beam and a reference light beam; an irradiating section, for scanning and irradiating a measurement target with the measuring light beam, which has been divided by the light dividing section; a combining section, for combining a reflected light beam, which is the measuring light beam reflected by the measurement target, and the reference light beam; a first interference light detecting section, for detecting an interference light beam, which is formed by the reflected light beam and the reference light beam being combined by the combining section; a tomographic data obtaining section, for obtaining tomographic data of the measurement target at each scanning position, by administering frequency analysis on the interference light beam detected by the first interference light detecting section; a second interference light detecting section, for detecting the interference light beam; and an optical path length adjusting section, adjusting the optical path length of one of the measuring light beam, the reflected light beam, and the reference light beam, based on the detection results obtained by the second interference light detecting section.