| 摘要 |
PURPOSE:To measure a two-dimensional shape on a the surface of body directly and accurately by irradiating a moving laser spot on the surface of the body through a variable angle mirror, and forming an image of its moving reflected light on a position sensor. CONSTITUTION:Laser light 2 from a laser emitting device 1 is passed through the mirror 4 which is varied in the angle theta to the laser emitting device 1 optionally by a pulse motor 3 and irradiated as a spot 6 on a surface of a cast billet 5 breadthwise. The laser spot 6 on the cast billet 5 is detected by a position sensor 9 through a filter 7 and a lens 8. Its detection output is supplied to a computing element 10, which calculates the surface shape of the cast billet 5 from the angle theta of the mirror 4 and the output current value of the position sensor 9. The calculated surface shape of the cast billet 5 is displayed on an XY plotter 11. |
