671nm solid-state red laser pointer
Nowadays, laser pointers are indispensable in many fields, especially in presentations. This is because in this case, it is very useful for teachers who can use a laser pointer to view every point in the presentation easily and quickly. .. But children also like laser pointers because they can use different accessories to project the projection onto the wall in the dark room. They also like to use high powered laser pointers to "shoot" the eyes of friends and parents. More mature people may even use such a 532nm laser pointer, for example to show off pilots.
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Wavelength
Due to the different wavelengths of red laser laser diodes, their structure is the simplest. Basically, each diode has only one battery. The red laser pointer first appeared in the 1980s. It was a huge and heavy device, worth hundreds of dollars, but now it is very small and very cheap. In recent years, a solid-state laser (Dpss) red laser pointer with a wavelength of 671 nm has appeared. The wavelength can be achieved with inexpensive diodes, but DPSS technology can further reduce the frequency band of the laser.
2021-11-30 11:53:53
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