LIGHT ABSORPTION DEVICE FOR HIGH INTENSITY LASER BEAM

摘要

PROBLEM TO BE SOLVED: To provide a light absorption device in which the light is effectively absorbed even when the light is such a high intensity laser beam as a high output ultrashort pulse laser beam thus damage or the generation of debris is negligible. SOLUTION: The device is furnished with an incident port 3 for the laser beam, opposite reflection surfaces 4 and 5 which are provided at the back of the incident port 3 and receive the laser beam and an optical absorption body 14 provided at the end of a leak opening 12 located at the other end of the opposite reflection faces. The laser beam 2 which is made incident from the incident port 3 is made incident at a large incident angleθwith respect to the opposite reflection faces and reflected, further made incident upon the other reflection face 5 of the opposite reflection faces and advances while repeating a plurality of reflections, a part of light energy of the laser beam 2 is absorbed at every reflection on the opposite reflection faces 4 and 5, finally the laser beam is made incident on the optical absorption body 14 from the leak opening 12 and substantially all the energy is absorbed and made extinctive.