| 摘要 |
PURPOSE:To simplify the handling operation, by setting turnably and fixably a curved surface mirror which receives laser light. CONSTITUTION:A bracket 7 is fixed to one end of a laser power source part 5 and is erected, and a curved surface mirror 9 is fixed to a channel-shaped frame rod 8 so that the curved surface of the mirror 9 faces laser light 2, and the frame rod 8 is supported pivotally in the upper part of the bracket 7 turnably and fixably. The laser light passes through a collimator incorporated in the head part of a laser tube 6 to obtain a condensed beam at the focus. The fanshaped beam reflected from the mirror 10 is moved from the horizontal direction to the zenith direction by turning of the frame rod 8. The fan-shaped beam is shown as one line having >=90 deg. opening angle, and a reference line is set easily in case of consturction of various kinds of buildings. |
