Laser pointer for lighting
The Norwegian Radiation Protection Agency pointed out that 20 mW is the limit: "I don’t know about laser pointers with an intensity exceeding about 20 mW. 20 mW can be used for anything useful. Laser pointers used to indicate constellations, etc., should not exceed the maximum effect at night. 20 milliwatts. The reason is that the light beam will destroy the night vision of the audience, so that they can no longer perceive the faint starlight." A study titled "high power laser pointer for visual astronomy: how much power is enough?" 23 people observed The authors adjusted the power of the 532 nm green laser beam that "propagates to the sky through the atmosphere in an urban environment with severe light pollution". 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 concludes that “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 it at a reasonable safety level Enough bright beam."
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Visible light laser illumination can be divided into the following two types according to the principle: blue light excitation to achieve white light fluorescent illumination; red, green, and blue three-color laser pointer synthetic white laser, or true color light. Infrared laser lighting is mostly used for night vision and night camera monitoring lighting. The two major application areas of laser lighting are the application of automotive lighting in the automotive industry, and the second, as safety lighting, used in riding warnings. Since the development of car lights, from the beginning to now, the judgment standards have become higher and higher. Brightness, energy consumption, response to complex environments and even aesthetic design are all indispensable and important indicators of the "car's eyes". According to the time of use, there are kerosene lamps, acetylene lamps, incandescent lamps, xenon lamps, LED lamps, and laser headlights. Different lighting technologies have different advantages, and LED lights and green laser pointer lights are different from the previous "light" light series, which can cope with more traffic conditions. Nakamura Shuji believes that compared with LEDs, laser lighting has a smaller light-emitting area, higher light-emitting efficiency, more sensitive sensory focusing and longer distance. Laser lights with lower energy consumption have a theoretical luminous efficiency that is 60% higher than LED lights. For example, the new green astronomical laser light on BMW 7 series uses only three laser diodes in a single light group (the small volume light system design also provides more Possibility). It also has a faster response speed, narrower beam, super penetration and lighting distance.
2022-01-05 12:07:34
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