A robot green laser pointer device has an instrument center, a first rotation axis, a second rotation axis, and a pointing axis, where the first rotation axis, the second rotation axis, and the pointing axis have a known relationship with the instrument center. A laser source provides a pointing-laser beam along the pointing axis. The pointing drive system is designed to respond to the pointing direction control of the laser, and emit a beam by rotating the pointing axis around the center of the instrument. A focusing optical device with a focusing optical drive is used to focus the pointing-laser beam in response to focusing optical control. The processor responding to the target position information generates pointing direction control and focus optical control. Some embodiments include an electronic distance measuring system with a measuring beam. The size of the laser power is an important indicator of the laser process parameters. Only the appropriate laser power can ensure the long-term stable operation of the laser and the optical system, and it is also the decisive factor for achieving the best processing quality. As shown in Figure 1, the conventional laser power monitoring device includes a thermal sensor and a control unit (not shown in the figure). The laser's resonant cavity emits laser light, and a 0.5% or lower power laser beam is transmitted through the tail mirror, which illuminates the thermal sensor, causing the temperature of the thermal sensor to change, and converts it into an electrical signal; the control unit receives the electrical signal, and Perform calibration; finally, externally display the actual output power of the monitored laser.
The diffuse reflector 2 is evenly provided with five second light through holes 21 and one wiring hole 23. Correspondingly, there are five photosensitive sensors 3, corresponding to the second light-passing holes 21, and the five photosensitive sensors 3 are arranged in parallel. In this way, the light received by the individual photosensitive sensor 3 can be effectively prevented from being too weak and there is a large error or cannot be detected, and the reliability and accuracy of the laser power monitoring device can be ensured.