| 摘要 |
A controlled distance indicating method and a marking method for a 3D laser marking machine, a controlled distance indicating device using the indicating method, and a 3D laser marking machine using the indicating device. The controlled distance indicating device comprises a visible light indicator (310, 410), a light splitting unit (322, 422) that is driven by a high-speed motor (321, 421) and a control unit. The light splitting unit performs high-speed reciprocating movement between a first position and a second position. A visible light beam (350, 450) is reflected by the light splitting unit at the first position to form a reference light beam (351, 451) and is reflected by the light splitting unit at the second position to form a deflected light beam (352, 452), and the reference light beam and the deflected light beam may be regarded as two beams of light when seen by naked eyes. The control unit calculates the difference between the first position and the second position, so that the intersection point of the deflected light beam and the reference light beam that is reflected by a reflection unit (340, 440) corresponds to an initial focus of the 3D laser marking machine. Accordingly, the initial focal length of the laser marking machine can be shown by controlling the intersection of visible light beams, and the controlled distance indicating device can automatically focus and can accurately and quickly complete the indication work for the initial focal length. |
