Patent ID: 7940398

Claim:
An optical coherence tomography apparatus comprising: a broadband light generating device for outputting light in all wave numbers within a predetermined range; an optical divider for dividing output light of said broadband light generating device into measurement light and reference light; a light-irradiating and light-trapping unit for irradiating a measurement object with said measurement light and trapping signal light comprising said measurement light reflected or backscattered by said measurement object; an optical coupler for combining said signal light and said reference light; a first optical demultiplexer for dividing output light of said coupler into a plurality of predetermined wave number sections and outputting divided output light; a second optical demultiplexer having a substantially identical structure to said first optical demultiplexer, for dividing another output light of said coupler into said plurality of predetermined wave number sections and outputting divided output light, and a group of photo-detecting devices provided in each of said predetermined wave number sections for measuring a difference between a first optical intensity of output light of said first optical demultiplexer and a second optical intensity of output light of said second optical demultiplexer.