| 摘要 |
PROBLEM TO BE SOLVED: To provide a line light projecting device capable of projecting a vivid line light to any object to be irradiated even if laser beams are cast in aslant and provide a cutting machine equipped with such a line light projecting device. SOLUTION: The line light projecting device 10 is set in the condition that the axis 26 of a semiconductor laser 12 and the optical axis 24 of a focusing lens unit 14 are shifted appropriately. When the laser beam 32a passing the main point 31 of the lens unit 14 is focused at the point A, the laser beams 32b and 32c outside of the laser beam 32a are focused at point B located farther than A and point C located nearer than A, respectively. As a result, a vivid line light with all irradiating positions well focused can be obtained in the case the laser beams 32 are cast on the work to be cut from above aslant. Accordingly the line light projecting device 10 can be mounted to the cutting machine fitted with sawteeth 52 in a position which does not move together with the sawteeth 52 and where the laser beams are cast onto the work aslant. COPYRIGHT: (C)2004,JPO
|
