| 摘要 |
PROBLEM TO BE SOLVED: To control an irradiation range of measurement light without providing an optical system of a complicated structure at an end part of a catheter device and an endoscope in the catheter device and the endoscope for photoacoustic imaging. SOLUTION: The catheter type photoacoustic probe 1 includes: a catheter 4; a multi-core optical fiber 5 having a plurality of cores 50 and 51 of different core diameters which are inserted in the catheter 4, first optical systems 41, 42, 43 provided on an incident end surface 5a of the multi-core optical fiber 5; and a beam diameter control means 45 for controlling the structure of the first optical system and/or a position of the incident end surface 5a so that laser beam L guided by the first optical system may be made incident on the incident end surface 5a of one of the cores in the state where a beam diameter of the laser beam L when the laser beam is incident on the incident end surface 5a nearly coincides with the core diameter of one desired core of a plurality of cores. COPYRIGHT: (C)2013,JPO&INPIT |
