Use laser to find alien civilization
But in fact, they are not the only ones who may be looking for alien life as a medium. Just like lasers, it can also transmit information between stars. It is understood that lasers can be converged into very tight beams and then tuned into a single beam. Frequency, and then penetrate the dust and gas in space. In order to see the laser "spot" on the wall or surface indoors or under dim light, a 5mw high power laser pointer is enough. The most demanding general-purpose pointing applications are pointing objects in bright sunlight, such as a tour of a city building during the day, and pointing stars at night when you need to see a beam of light in mid-air. For these purposes, 5-25 mW should be no problem, and for harsh conditions (high ambient light brightness, showing stars to a large group of people) the maximum is 50 mW. In the past 60 years, people have generally used radio signals to look for signs of alien civilization. Usually lasers can only emit light of fixed colors of red, blue, and green, so it must be converted into a relatively high brightness, which is close to natural light. Lighting requirements. When the color temperature is 5500K in the daytime and sunny days, if the blue laser pointer is in front of a layer of phosphor, its beam color will become white. Excite
Tags
Light Source
According to SETI itself, they have been experimenting with this project for two years, and now they are entering a new phase. Obviously, the plan needs sufficient funds to start. To this end, the agency launched a $100,000 fundraising campaign on Indiegogo. It is reported that the raised funds will be used to purchase the assembly and initial installation costs of two custom cameras and special optical equipment, and the additional funds will be used for two complete observatories. Laser illumination Visible laser illumination, infrared green laser pointer illumination. Visible laser illumination is divided into the following two types according to the principle: blue light excites phosphors to achieve white light; red, green, and blue lasers synthesize white laser or true color light. Infrared laser lighting is mostly used for night vision and night camera monitoring lighting. The range of the headlights is twice that of the 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.
2022-01-05 12:06:55
Your Answer: