Method of and apparatus for measuring laser beam

摘要

PCT No. PCT/JP81/00089 Sec. 371 Date Sep. 9, 1981 Sec. 102(e) Date Sep. 9, 1981 PCT Filed Apr. 15, 1981 PCT Pub. No. WO81/03068 PCT Pub. Date Oct. 29, 1981.According to the invention, a thin wire 13 is arranged across the laser beam 2, and the change of resistance in the thin wire 13 is measured by a resistance meter 21 while moving the thin wire 13 by a driving mechanism 23, thereby to measure the power of the laser beam or the position of the laser beam. The apparatus can be used for monitoring the power of laser beam or position of the same used in the high-power laser device for processing or the like purpose. According to the invention, it is possible to monitor the power and position of the laser without interrupting the laser beam and without incurring substantial increase of the loss of power of the laser beam.