Visual effects of RGB laser pointer
In fact, there is not much difference between LD laser and LED light from the excitation light source. YAG laser is not only a kind of laser radiation. After the fluorescent conversion of LED excitation light is added to the semiconductor, the main difference is that the laser monochromatic color is very good, and the LED spectrum will be Wider, suitable for display, lighting, etc. In addition, the brightness of the two can not be compared, because the laser is a straight line of light, the direction is strong, if it is not processed, the brightness will be much larger than that of the LED. Laser is still immature for RGB visual effects, and only stays in the laboratory state. Laser projection and laser TV are only a concept now. Usually the laser can only emit light of several fixed colors, red, blue, and green, so it must be converted into a relatively high brightness, which is close to the lighting requirements of natural light. When the color temperature is 5500K in the daytime and sunny days, if the high power laser pointer is in front of a layer of phosphor, its beam color will become white. The range of laser headlights is twice that of LED high beams, which complements the LED lighting system. 5500K is relatively close to the color of the sun, and the naked eye will be white and not white. The headlights in the distance of the 1000mw laser pointer can be used normally. The main advantages of laser are smaller size and longer distance. Compared with LED high beam, the distance ranges from 250 meters to 500 meters. As for the penetration problem, weather such as rain, snow, and fog will affect the penetration of any lamp, and laser headlights are no exception.
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The working principle of the accelerator is to project a high-energy, high-brightness green laser pointer beam onto a thin metal foil target with an area of only a few square microns. "The energy of the laser pulse is very large, and the energy of the electromagnetic field produced is even an order of magnitude larger than the Coulomb force inside the atom," Hidding explained. "Therefore, the metal foil target will be converted into plasma immediately." Plasma particles are strongly excited by laser and other plasma fields. The degree of acceleration depends on the initial position of the particles. This process can generate huge amounts of energy. The power of the 532 nm green laser beam propagating to the sky through the atmosphere. It can be clearly seen that the minimum power of the beam is between 1.4 and 5.6 milliwatts. The average of all powers selected is 2.4 milliwatts. The author's conclusion Yes "A green laser pointer with an output power of less than 5 mW (American National Standards Institute 3a or International Electrotechnical Commission 3R laser class) seems to be sufficient for educational nighttime outdoor activities, providing a sufficiently bright beam at a reasonable safety level. "
2022-01-05 12:06:43
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