Laser pointer is widely used in presentation. Users can be completely liberated from the computer. They are cheap, ready for equivalence, low power consumption and easier to handle PWM technology. Users don't have to put it next to the computer. The laser pen operates with only about 100 microsafety currents. Recently, researchers reduced the photon line to a fifth of a micron. At this scale, the number of photons in this structure is less than 10, which is close to the conditions required for operation, but the number of photons will not be reduced to such a limit. Laser photography has completely changed the office automation of the printing and publishing industry. The bar code with red laser identification light source has been widely used in the management of commodities, e-mail, books and archives, which greatly improves the work efficiency.
Ordinary laser writing is still very attractive.The Laser pointer saves the heart of the page instead of the page, which truly reflects the wireless click and gets infinite wonderful! Simple and practical, it is a good helper in life. The lowest red laser pen is ideal. When the climate is good, the visual distance can exceed 100 kilometers. Laser pen is widely used in our daily life, such as visiting museums, doing exhibitions of various display skills, visiting website construction, teaching, travel guides and so on.Even if the collimated beam is only a few millimeters in diameter, it can be observed with the naked eye at a long distance.