Patent ID: 9433466
Filing Date: 2016-09-06
CPC Classification: A61B,G02B

Claim Text:
1. An optical fiber for use in an underwater shockwave generating device that generates an underwater shockwave by irradiating a laser beam underwater, said optical fiber comprising; a linear main body part and a laser beam convergence part disposed on a front end thereof, wherein the laser beam convergence part has a central longitudinal axis and a radius extending from the central longitudinal axis to an outer circumference of the laser beam convergence part gradually decreases toward a front end of the laser beam convergence part, wherein the laser beam convergence part has an approximate solid truncated cone shape where a leading end has a planar surface perpendicular to the axis, wherein an interior angle with respect to a radial direction of a lateral face of an axial cross-section of the laser beam convergence part continuously or non-continuously and gradually decreases toward the front, and wherein an outer surface of the laser beam convergence part is configured to be a mirror surface by mirror finishing.