| 摘要 |
PROBLEM TO BE SOLVED: To improve an S/N ratio of an interference signal, in an optical tomographic imaging system using optical tomographic measurement. SOLUTION: In the optical tomographic measurement using light wherein a wavelength is swept at a fixed period, interference light L4 between reflected light L3 and reference light L2 is branched into the first interference light L4a and the second interference light L4b by a light branching means 5. The first interference light L4a and the second interference light L4b are attenuated with each different attenuation factor in each wavelength band respectively so that each light quantity becomes approximately uniform by variable light attenuators 60A, 60B, and then balance-detected by an interference light detection means 70. COPYRIGHT: (C)2008,JPO&INPIT
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