| 摘要 |
The apparatus includes a target 32 having a reflective portion 48 and a mask 56 surrounding the reflective portion. The mask includes a material that changes appearance when excited by a laser (for example, the mask may include a fluorescent material that turns from orange to yellow in colour when excited by a laser). To calibrate a laser projection device a plurality of positioning stages (212, figure 4) are placed on a calibration wall surface (208). A target (214) may be mounted in each of the positioning stages and position coordinates for each of the targets are entered into the laser projection device. When a target is excited by the laser it is determined whether the beam is in alignment with the target (214). |
