The impact output of green laser pointer consumed on average by astronomers and the general public is preferably less than 5mW; in the US, these are called Type 3a lasers. Reduced wattage lasers, similar to those found in avid CD players and laser printers, of type 1 or 2, preferably better powered units, corresponding to type 3b or 4 in medical or industrial equipment . The higher the rating, the more it exceeds the warning label required by the US FDA Food and Drug Administration.
Prohibition of misuse of laser pointers
Improper use of the laser pointer without following safety precautions may result in eye injury and is unacceptable practice. Improper use can create conditions that endanger the health or safety of others, including disrupting classrooms with fun beam sweeps, even if no harm is done. Those who misuse the laser pointer may be subject to disciplinary action in accordance with the Student Code of Conduct or appropriate personnel policies, and may be subject to possible legal action if harm occurs.
Compared to soft lights that consume tens to many watts instead of milliwatts, 5mW feels little or nothing. However, simple laser pointers are highly focused in narrow beams. Furthermore, the beam is highly collimated, which means that even at kilometer distances, the diameter of the shaft does not exceed one meter. For stargazing applications, a 5mW eco-friendly laser is sufficient.
Differences between 520nm and 532nm green lasers:
Due to state-of-the-art diode high power laser pointer technology, professionals have recently worked to complete green diode lasers. Compared with the previous diode-pumped 532nm green laser, this newly developed powerful 520nm green diode laser pointer is more stable and reliable in long-term operation. In general, diode lasers are more widely available than diode-pumped lasers. Therefore, this powerful green diode can achieve stable performance in various work situations.
