| 摘要 |
PURPOSE:To make the optical axis of laser light variable while keeping a focal position invariable with a simple mechanical mechanism, by guiding the laser light from a one or higher dimensionally movable irradiation mechanism to a condenser lens by specifically providing two curved arms. CONSTITUTION:The laser light LB from an oscillator 12 on a horizontal support member 9 which is one or higher dimensionally movable advances downward along the central axial line M1 perpendicular to the member 9 in a hollow curved arm 13 supported rotatably around the line M1. The light LB is reflected by a mirror and advances in the direction of the horizontal central axial line M2 and the central axial line M3 inclined by 45 deg. inward and downward with respect to the horizon. The light advances further along the line M3 and the central axial line M4 inclined downward on the outer side thereof in the 2nd curved arm 16 supported freely rotatably around the line M3 to the forward end in the inclined part of the arm 13. The light LB advances in the direction of an oscillating central line M5 extending to the inner side at 45 deg. with respect to the line M3 and passing always the intersected point P of the lines M1 and M3, passes a condenser lens 23 and is converged at the point P. |
