| 摘要 |
PCT No. PCT/SE98/00838 Sec. 371 Date Nov. 4, 1999 Sec. 102(e) Date Nov. 4, 1999 PCT Filed May 6, 1998 PCT Pub. No. WO98/50196 PCT Pub. Date Nov. 12, 1998Device for detecting and calculating focus point position (2), shape (3) and power distribution of a laser beam after a focussing lens, and which at least incorporates a laser source (10), the focussing lens (4), a light affecting body (5, 6), a light sensor (7), and means for calculation (9). The device is characterized in that the focussing lens (4), the light affecting body (5, 6) and the light sensor (7) are arranged so that their relative distance is changeable, that the laser beam (1) and the light affecting body (5, 6) are arranged to perform a relative movement consisting of one or more tracing movements through the beam path, preferably in at least one plane and with different relative distances, that the light sensor (7) is arranged to measure at least a fraction of the laser light (1) emitted by the light affecting body (5, 6), and that the light sensor (7) is arranged to produce an output signal (8) which is arranged to be received by a calculating means (9) for calculation of focus point position (2), shape (3) and power distribution. |
