博文

目前显示的是 十月, 2021的博文

What is the development principle of the laser pointer?

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The structure of the red laser pointer is the simplest. The reason why it is simple is that the red laser pointer is basically just a diode with battery as the energy source. And there are laser diodes that generate this wavelength. The red laser pointer first appeared in the 1980s. It is a large and heavy device worth hundreds of dollars; it is very small and very cheap. The word laser should be familiar to you. Laser production We often encounter lasers in our daily lives, such as laser 20000mw pointers used in classrooms, and CD-ROMs used to read CD data. In industry, lasers are often used for cutting and micromachining, displacement measurement, etc. In the military, lasers are also used to intercept missiles. Scientists also used lasers to accurately measure the distance between the earth and the moon, and the error involved was only a few centimeters. These are some of the broad applications of lasers. In fact, it took a long time to develop a laser. The famous phy...

How much power does the 50W laser pointer have?

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 The highest power laser flashlight is 4000MW blue laser flashlight. The super-powerful high powered laser pointer can burn holes in dark clothing in seconds. Within a meter, 1,200 megawatts of blue light is enough. Blue light at 2000MW is better. Precisely because you know the power of high power lasers, you must use them correctly, depending on the power of the laser pointer. A 30MW laser pointer won't do much, no matter how focused with a magnifying glass. How does a laser pointer instantly ignite clothes in less than a meter? Most importantly, it depends on the output power of the laser. Over 50 milliwatts of capacity ignites a dark ocean fire around the tightly spaced core. Second, the waves of right and wrong are more powerful than the long waves of light! Laser Pointers fall into four broad categories based on their energy intensity. The power of the first low output laser pointer was less than 0.4MW. The laser pointer is basically harmless to the eyes. It is ...

How powerful is a 5000MW laser pointer?

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 The super electronic product of the new era: 50000mw super high power laser pointer 5000mw . Divided into red light, blue light, green light, and purple light, the colors are all super beautiful. When you turn on the button, it's really magical. On the other hand, high-power laser pointers have great requirements on batteries, so you may need to buy better batteries when buying laser pointers, so that you can better feel the 50000mw laser pointer. The effect is really worth buying. How can it be regarded as a super laser pointer? Level I: This laser pointer will not cause any known damage. If you use a 200mW laser pointer, you don't need to install another driver. IA category: This is a special grade of laser pointer, because the laser scanner used in supermarkets is "not suitable for direct observation with eyes." The maximum limit of this level of laser power is 0.4 mW. Class II: Refers to low-power lasers in the visible spectrum with a higher ...

How to treat the surface of laser hardening

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 The laser-treated surface makes the workpiece more resistant to load. Laser quenching, melting and coating improve the load-bearing capacity of the workpiece. Improve the hardness and toughness, change the surface structure and generate pressure tension or protective coating on the surface. Laser marking and laser pointer 5000mw micromachining can also change the surface of the workpiece. The principle of laser quenching: the laser beam heats the surface of the metal and quenches it to increase its hardness. The advantage of laser hardening technology is that it can process irregular 3D workpieces, with few follow-ups. Due to the extremely low heat input, the deformation of the workpiece is very small, reducing further processing or even no further processing. What is an excimer laser? A gas laser that uses a mixed gas of rare gas and halogen gas as the medium and is mainly excited by pulse discharge. Representative examples include ArF excimer laser (wavelength 19...

What is a class 1 laser pointer?

 Class 1 red laser pointer are harmless (safe for the eyes), and regardless of the emitted wavelength, no further measures are required except for proper marking on the device. Laser class 1M: The accessible laser radiation wavelength range is 302.5 nm to 4000 nm. In addition, which lasers are allowed? If the danger cannot be ruled out, the product is prohibited from being sold in Germany. This applies to all laser pointers with a power higher than 1mW (hazard levels 3R ​​to 4). Accordingly, only 1 to 2M laser markers can be traded in Germany. The first condition for producing laser light is population inversion. In semiconductors, electrons in the valence band are pumped to the conduction band. In order to obtain ion number reversal, heavily doped P-type and N-type materials are usually used to form a PN junction. In this way, under the action of an external voltage, ion number reversal occurs near the junction area. At high Fermi level EFC Electrons are stored in ...

Various discussions about laser pointers

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 There are different types of high power laser pointer on the market, so people should always have a clear observation and sufficient basic knowledge before making a decision. For laser enthusiasts, choosing a laser pointer from a reliable supplier and knowing what type of application you need is always a wonderful choice. Please be careful and use a satisfactory laser pointer according to your needs. What should I do if the laser pointer enters the eyes? Along the beam, a luminous source 30 meters away, a laser pointer fixed on the wheel of an electric vehicle, was found. Although the light is shining diagonally upwards, because the laser pointer is fixed too low, pedestrians will almost always be irradiated when they pass by the booth. The other laser pointer fixed on the electric vehicle projects a green spot of light on the ground downward. Laser pointer: Never shoot the eyes directly. The real name of the laser pointer is the "laser pointer". It is a ligh...

How to avoid laser pointer accidents?

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 The laser flashlight is a semiconductor laser. The reason why it is different from the 3w laser pointer is that its volume is easier to dissipate heat. The laser module is directly connected to the aluminum flashlight shell to contact the Q-Line fiber green semiconductor laser flashlight. Generally, the flashlight module is relatively thick. Is the eye injury caused by the laser pointer appear immediately or later? High-power laser, direct sunlight with sunglasses or dangerous sunglasses can only block the glare, and the direct heat of the laser will only reduce a little. As long as the eyes are not directed, it will not It will damage the eyes. What does FDA compliance mean? Well, it must have a certain quality and be considered to meet FDA standards. This is because red laser pointer may be "temporarily dangerous" to others and must meet certain criteria to be approved. There are many laser products whose power far exceeds 5mW. Some of them are advertised as ...

What color laser pointer can best repel crows? High-power laser pointer?

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 The crow high power laser pointer is a new weapon that birds have never seen before. It was difficult to get rid of it in the past, but the effect was fair. I can't even use a gun. At night, I can't do anything. So which one should I choose, green laser crow insect repellent, blue laser crow insect repellent, or red laser crow insect repellent? The green laser pointer is brighter than the red laser pointer. The green laser pointer is a scientific research, used in laboratories, astronomy, sports, hunting, etc. The human eye has the highest sensitivity to green. Destroy harmful birds, drive away crows, and look up at the stars. A stunning colorful laser green waterproof ultra-cheap laser pointer 200mw can be used at 25 meters, but not because of water pressure You need to turn it off. Small and exquisite, no problem to carry. A qualified laser pointer drives away crows? Qualified laser pointers are long-lived, high-performance, and stable when they are matched...

How to understand all the precautions of the laser pointer?

 The NOHD of any laser with a class higher than Class 1 will be greater than 100 mm, but the laser standard stipulates that NOHD is usually calculated based on an exposure time of 100 seconds, and for the exposure time of a visible laser pointer, this exposure time will be deliberately required effort. The exposure time may be short, and the eyeballs will move instead of staying still. To show the possibility of accidental injury, we calculated the MPE for 0.1 second exposure, and then used this limit to calculate "0.1 second NOHD". In other words, exposure to the direct beam of the laser for a distance of only 0.1 s may cause retinal eye damage. The 0.1 s NOHD exposure shows that the risk of accidental exposure by the Class 2 laser through the NOHD showing 0 m is quite low. If there is danger for other reasons, there are other ways to buy a high power laser pointer . In the case of pilot or driver contact, there is a risk of "dazzling" due to temporar...

Will using a laser pointer cause lightning strikes?

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 Small portable high power laser pointer are used to guide lightning strikes and prevent forest fires caused by lightning strikes-a study that could lead to such measures was recently announced. Does the laser pointer emit radiation? Basically electrical components have radiation. I have a friend who makes this product. The radiation of the Green laser pointer is very small, and there is no harm to the human body. But don't irradiate the eyes to affect vision. Improper use of laser can cause temporary or even permanent visual damage. Looking directly at a laser with a power of 5mW and above will cause temporary visual damage to the eyesight, and a higher power will cause permanent visual damage or even blindness. High-power lasers may ignite flammable materials and cause fires. Can portable laser products be sold? Battery-powered portable laser systems can be sold in the United States, provided they are fully compliant with standards, certified and reported, and a...

Some things about buying a powerful laser pointer

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 Australia introduced some restrictions on high power laser pointer in 2008. Since July 2008, the import of lasers> 1 mW is prohibited. In parts of the country, such lasers and laser pointers fall under the jurisdiction of the Weapons Law. In the United Kingdom, the sale of laser pointers with a power exceeding 1 mW is prohibited. The public safety guidelines prohibit the use of lasers above Class 2 in public places, because lasers may endanger personal safety. In the United States, only laser pointer beam sources are allowed to be sold under the name of lasers below 5 mW (class 3R). Especially in some states, it is a criminal offence to dazzle the police. The power of imitation guns is great, and the lethality of the "powerful laser cannon" cannot be underestimated. This powerful laser cannon is an enhanced version of the laser pointer and is also known as the "Gatling laser cannon" on the Internet. The high-power blue laser pointer that are gene...

The development road of the strongest artificial laser pointer

 We living in modern society are often exposed to lasers. For example, in schools, teachers use high power laser pointer in class; in medicine, lasers can be used to correct vision defects; in industry, we can use lasers to cut steel and other materials; in supermarkets, when salespeople check out The electronic scanning gun used also uses a laser. What kind of light is laser? First of all, ordinary light, that is, common light in our daily life, is mostly irrelevant light sources, such as the light of a flashlight, the light of the sun, and the light emitted from an electric bulb. The so-called incoherence means that the light emitted from these light sources has two common characteristics. They are all composed of different colors of light, and they all look white, and these different colors of light, even the same color of light, The direction of polarization is different. The Green laser pointer is like a lot of people walking in a phalanx. Everyone has the s...