Usually 488nm blue laser diode module applies laser diode as the core component, which is responsible for generating laser with a wavelength of 488nm. It is generally made of specific semiconductor materials. By injecting electric current to achieve particle number inversion, stimulated radiation is generated to form laser. Usually a finished laser device includes collimating lens, focusing lens, which are used to collimate and focus the divergent beam emitted by the laser diode, so that the laser beam becomes a blue reference dot with a specific brightness and low laser beam divergence angle, and ensures the emission of a clear and stable laser light source for all industrial and high tech fields.