<；P>；PROBLEM TO BE SOLVED: To generate a tomographic image having a high S/N ratio and appropriate resolution from a shallow position to a deep position. <；P>；SOLUTION: In the processing part 22 of an OCT (Optical Coherence Tomography) processor 400, a focal position specifying part 230 specifies a plurality of different focal positions of measurement light L1 to an optical structure information detecting part 220. The part 220 detects optical structure information from an interference signal detected by an interference light detecting part at the focal position predetermined by the part 230. A tomographic structure information generating part 225 generates tomographic structure information for each of the plurality of different focal positions of the measurement light L1 based on the optical structure information detected by the part 220. A plurality of focal point images synthesizing part 221 generates synthetic tomographic image based on the tomographic structure information of each of the plurality of different focal positions stored in a memory 231. <；P>；COPYRIGHT: (C)2011,JPO&INPIT
