At present, laser diodes are being produced. In the context of astronomy, it is convenient to use and save space (such as battery driven handle / ordinary battery or rechargeable battery). It is recommended to use green laser radiation (better retinal stability index), which is the only color that can be completely visible to humans in the dark.
Why are Green laser pointer better than red, blue and purple? How about the laser burner? In addition, nothing is more suitable for long-range aiming than a powerful laser handle, which can be seen at night. For example, this tool can accurately display these and other planets for those who are not familiar with the subject or do not listen to constellation instructions. Many astronomical clubs and organizers of astronomical night chose this learning tool. It should be noted that some types of laser radiation can cause skin tissue damage.
In addition, if light (laser) accidentally hits the eye, the power of the laser is only a few milliwatts, which may damage the retina. Both visual beams (400-700 nm) and invisible beams (other light lengths) can be detected.Of course, you can also see the real laser points and beams with your own eyes, but why are some colors more obvious than others?
In fact, in infrared and infrared spectra, the skin absorbs the energy of laser, resulting in thermal phenomenon (heating or burning tissue).For example, laser is the most common laser in daily life. It can be used for demonstration and observation of stars and laser combustion in scientific experiments.
