Patent ID: 8125645

Claim:
An optical tomographic imaging system comprising: a wavelength-swept light source; a splitter configured to split light emitted from said wavelength-swept light source into measuring light and reference light; an optical probe configured to irradiate said measuring light from said splitter onto a measuring object to be measured and contain within a sheath a measuring unit that acquires reflected light from said measuring object; an optical path length adjustor configured to set a first reference position of a measurement depth direction to an inner edge of a measurement range by adjusting an optical path length of said reference light; an optical path length switching unit that has a preset optical path length that differs from said first reference position in terms of measurement depth by a predetermined amount and provides a second reference position on an outer edge of the measurement range, and is configured to change the optical path length of said reference light or the optical path length of said reflected light adjusted by said optical path length adjustor so as to switch between said first reference position and said second reference position; a control unit configured to control said optical path length adjustor and said optical path length switching unit; a multiplexer configured to multiplex a reflected light and said reference light acquired by said measuring unit and generate an interference light, disposed on a downstream side of said optical path length adjustor and said optical path length switching unit; an interference light detector configured to detect said interference light generated by said multiplexer as an interference signal; and a tomographic image acquiring and processing unit configured to obtain a tomographic image from said interference signal detected by said interference light detector.