A yellow laser pointer with a wavelength of 593.5nm is on the market. Based on DPSS technology, two laser beams with wavelength of 1064 nm and 1342 nm were added through nonlinear crystal. The complexity of this process makes the yellow laser pointer unstable and inefficient, with the output power varying between 1MW and 10MW with temperature. If it is too hot or too cold, a mode jump will occur. This is because the size of the laser pointer does not provide the required temperature stabilization and cooling components.
According to the degree of damage that the laser system can cause to the human body, the risk ranges from the first laser (no harm) to the fourth laser, such as 2000W CO2 laser (can cut thick steel plate). According to the relevant provisions of the EU EN-60825 standard and the "2005 General Product Safety Regulation", ordinary civilian laser products can only be grade one or two, grade one laser products are not biohazard, and grade two laser products output power is less than 1 mw. Unqualified laser Pointers are identified as class IIIA laser products with power less than 5MW. The laser products can cause eye damage such as blindness in some cases, according to the classification of hazards. Obviously, laser products at this power level are not suitable for making ordinary civilian laser Pointers.
According to the investigation of the inspection and quarantine department, the Laser pointer on the market in Our country generally has the problem of high power. The power of most products is between 1-5MW, and some even exceed 5MW, posing a huge hidden danger to the public's visual safety. The main reason is that manufacturers, distributors and consumers generally lack of safety awareness of the use of laser, one-sided pursuit of the brightness of laser products, while ignoring the harm that laser may cause. To this end, the inspection and quarantine departments remind laser pen and other ordinary civilian laser products manufacturers, do not ignore the danger of using products in order to product performance, and control the power of laser products within the safety range.