| 摘要 |
PURPOSE:To easily change plural converging elements and to enable the optimum working in a short time without detaching an unit by fitting a freely changeable converging element selectively via a changing-over means to a laser guide. CONSTITUTION:The laser light 2 emitted from a laser oscillator 1 is changed by a refraction mirror 3 at its direction, converged by converging elements 7A, 7B, 7C of converging units 8A, 8B, 8C located just under a laser light guide 4 and projected on a work 9. The converging units 8A, 8B, 8C incorporating the converging elements 7A, 7B, 7C suitable for working are selected according to the thickness, etc. of the work 9 and simply rotate a rotary base 6 so that this converging unit 8 may be located just under the laser light guide 4. The switching of the converging element can thus be done simply. |
