The blue Laser pointer can also directly generate indium gallium nitride semiconductor to generate blue light without frequency doubling. There are (447±5 nm) blue laser diodes on the market. The device is bright, the same as a violet laser diode with a power less than 405 nm, because the longer wavelength is closer to the peak sensitivity of the human eye. The mass production of laser engraver projectors for commercial equipment (such as laser diodes) has brought down prices. The popular high-power (1W) 447 nm indicator also has an improved optical version with better collimation and lower divergence, which is comparable to the use of these portable devices, and reduces related problems. The intention and cost of human injury. Competitiveness of laser wavelength.
Blue-violet light It can be equipped with a gallium nitride semiconductor laser to emit 405 nm purple light. This is near-ultraviolet light, which is very close to human sight and causes bright blue fluorescence. In ordinary non-fluorescent materials, and in the case of anti-fog or dust, the color seems to be a dark purple shade, which cannot be reproduced by display and printing. The gallium nitride laser emits directly at 405 nm without frequency doubling, thereby eliminating dangerous infrared incidents.
A blue laser pointer is a tool that uses a laser as a pointer. The length that can be indicated is relatively far, which can replace indicators and other pointing tools, and can also be used as an indication when playing slides, ppt, etc. Most current laser pointers are blue and expensive.