| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical probe which can reduce noise in OCT measurement.SOLUTION: An optical probe 10 includes: an optical fiber 11 which transmits light between a proximal end and a distal end; and a converging deflecting optical system 13 which is connected with the optical fiber 11 at the distal end and converges and also deflects the light emitted from the distal end of the optical fiber 11. The converging deflecting optical system 13 has a central axis 13c extending between a first end 13a and a second end 13b. The first end is connected optically with the optical fiber 11 and the central axis is parallel to emission light from a ground mode of the optical fiber 11. The system has a refractive index distribution where a refractive index becomes smaller as a distance from the central axis becomes longer, and condenses the light according to the refractive index distribution. It has a reflecting surface forming an angle of 30 to less than 45 degrees at the second end, and reflects and deflects the light by the reflecting surface. |
