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Fiber laser is a laser cutting machine is the core component, in general, it has played a significant effect on the cutting laser cutting machine. When choosing laser cutting machine, fiber laser customers are very focused brand, even the life of the module integrated manner. Well, today on the high-energy 30000mw laser pointer to tell you about the fiber laser modules.

Fiber laser modules are divided into single-mode and multimode, in cutting applications, a focused spot has a great influence on the cut quality, relatively small core single-mode lasers, beam quality is better than multi-mode, energy distribution Gaussian distribution, the highest energy density in the middle, three-dimensional figure is a sharp mountain-like circle.

Multimode lasers compared to thicker core, single-mode beam quality to be worse compared to the distribution of energy as compared to the average number of single-mode light spot, a three-dimensional image inverted cup from the edge steepness of view, than multimode many steep single-mode.

1mm sheet cutting speed multi-mode single-mode than 20% higher, the visual effect is almost, but 2mm start, the speed advantage of the gradual decline from the beginning of 3mm, both speed and effect, the advantages of high-power multimode green laser pointer speed and effectiveness is very obvious It reflected. So the advantages of single-mode in the sheet, multimode advantages planks, single mode and multimode not mutually comparable value, is a fiber laser configuration, like a car, cars for the road, suitable for cross-country mountain but cars also run mountain, cross country and road run, so choose multimode fiber laser in the end depends on the actual end-user or single-mode processing needs.

So single-mode and multi-mode, how do we choose?

High Energy Laser suggestions: differentiate from the power level, the lasers 1000W or less because of the energy itself is not high, mainly in favor of the sheet processing of material thickness, and therefore within the single-mode 1000mw green laser 1KW configuration is in line with the actual market situation, more than 1KW of power to take into account the laser Bohou. From the entire industry in terms of processing, improve processing quality is a rigid demand, is not compromise, so a lot of high-power single-mode laser selection will not be considered to be the quality assurance process for the first!

At the same time, the single-mode core is generally smaller, which means the same power of the laser light energy transfer in which single-mode core carry more, the material is a challenge, but when cutting highly reflective material, high intensity reflection laser light emitted overlay, if the fiber material is less than the tolerance will be very easy to "burn core", while the core material life is also a challenge! So many laser manufacturers in the high-power fiber 500mw green laserconfigurations still use multimode Configuring!

Daily life, a lot of news such as rising oil prices, energy crisis, global climate change will cause us to panic for the future. The current consensus is that we need to reduce dependence on oil in favor of clean energy, avoiding harm to our planet. This view is the people and governments around the world wide support, even in the United States. Scientists in various countries around the world are looking for alternative sources of energy, such as renewable energy sources like wind, biofuels and solar energy.

In mid-century, Bell Labs invented the "Bell of solar cells," but its high cost limited the development of solar cell industry, even after 55 years since then, solar photovoltaic power generation in the global grid accounted for only about 0.04% . However, the situation has changed in recent years, from flat panel display and semiconductor industries burning laser processing technology derived from the solar industry, there has been explosive growth.

Currently there are three common commercial application of solar cell technologies: multi-junction cells, crystalline silicon cells and thin film batteries. Multi-junction cells prepared by application on a single crystal substrate by chemical vapor deposition techniques, has the highest electron conversion efficiency (typically 28-29%, and even up to 40%). As production costs are very expensive, they are typically used regardless of the cost or effective area smaller applications, such as satellite or solar concentrator. Crystalline silicon cells most widely used efficiency monocrystalline or polycrystalline silicon is roughly 13% to 22% range. Thin film battery is a new technology, (8-18%) and low production costs are relatively low efficiency.

Crystalline silicon cells occupy approximately 93% of the PV market. In 2006, solar applications beyond the semiconductor industry, silicon has become the most important application direction (55%), which makes a significant increase in demand for silicon, silicon and caused prices to rise rapidly. So people began to look for alternatives, such as thin-film batteries. Cells are typically made of different multilayer thin film materials deposited on a glass or metal substrate, a common structure as shown in FIG. Most of absorbent material used is amorphous silicon, cadmium telluride (CdTe), copper indium gallium diselenide (CIGS). An outer electrode of the cell is typically made of indium tin oxide (ITO), zinc oxide (ZnO) conductive glass (the TCO), aluminum and molybdenum and other metals. Diode-pumped 30000mw laser pointer commonly used for connecting and insulating portions crossed at different levels.

The first step in the manufacture of thin film battery is on a glass substrate coated with electrodes, this coating is typically ITO (Indium Tin Oxide, light transmissive material). Then P1 scribing process electronic circuits, commonly used Q-switched laser wavelength of 1064 nm and 12-15 W average power. To improve the yield, the laser must be 100 KHz above the high repetition rate for rapid scanning, pulse width should be very narrow (15-40 ns) so that the peak power is higher than the ablation threshold of the material.

To achieve this ideal laser machining process include Spectra-Physics (Spectra-Physics) the Navigator, Hippo or Talon series, currently the world have installed hundreds of sets of such a laser scribing photovoltaic device. Quality spot and pulse stability is also very important to make sure that they are crossed quality, repeatability and reliability of the key. Once the ITO layer is completed, the panel returned to a chemical vapor deposition apparatus, the semiconductor film (amorphous silicon layer).

After the P2 laser process using 532 nm laser scribe from the back of the glass. Similarly, high repetition rate and short pulse width (15-30 ns) is the best, and the process power requirements are not high (typically less than 1W). So you can use a low-power green laser, or a laser beam into a plurality of 4-6 W of simultaneous multiple processing. When the P2 process is complete, the battery back-plate electrode coating (usually aluminum), and finally P3 laser scribing process, which is from the back through the glass substrate, and using the same green laser pointer process and P2. Good quality spot and pulse stability is particularly important to avoid harm to other material layers. P2 and P3 applied to the process of Spectra-Physics Lasers have the Navigator, Hippo and Talon Series green (532 nm).

The biggest advantage over conventional silicon thin film battery cell is full automatic production line, flat panel display equipment coating equipment manufacturer Applied Materials, Oerlikon, Ulvac and Leybold has recognized this opportunity, we began the development of automated production lines. It's the same as the flat panel display market principles to reduce costs by increasing the processing area.

The laser system is an important part of this online automated production lines. As used in the semiconductor and flat panel display, like a laser shine also make solar cell market.

http://www.everyonetobuy.com/best-10000mw-green-handheld-burning-laser-pointer-pen-flashlight.html

Laser technology is one of the four great inventions of the twentieth century and atomic energy, semiconductor and computer par. Thirty years to the laser-based laser technology in China has been rapid development, is now widely used in various fields of industrial production, communications, information processing, medical, military, culture, education and scientific research, and achieved good economic and social benefits to the national economy and social development will play an increasingly important role. Development of short green laser pointer, high-tech, professional, development of the industry segment is the main line, and more to a certain industry or a certain power to segment the market. As the market needs of small and medium power laser cutting industry has been dominated by the laser market dominance. Although the Chinese small and medium power laser cutting equipment industry is still in the early stages of growth, the domestic laser equipment manufacturing enterprises generally smaller scale, much more than one hundred million yuan of annual sales revenue of laser equipment manufacturing enterprises, but laser equipment manufacturing enterprises have a very large space for development.

Laser cutting technology Introduction: Laser cutting is one of the thermal cutting method using a focused high power density laser irradiation parts, so that the irradiated material rapidly melting, vaporization, ablation or achieve ignition, and by means of high-speed air stream coaxial with the beam blowing molten material, in order to achieve the cut workpiece. Small and medium-power laser processing technology is advanced manufacturing technology. Compared to the traditional processing technology, small and medium-power 30000mw laser pointer processing methods for the non-contact processing, no "tool" wear machining, processing speed, no noise, no pollution, is the green manufacturing technology; in addition, the laser processing can be personalized, diversification process, because no mold, shorten the processing cycle, saving processing costs, improve processing efficiency.

Laser means that the material produced by stimulated emission light, laser light having a good monochromatic, coherent and directional, the characteristics indicated by the frequency or wavelength (λ). Laser processing is the use of a burning laser pointer beam interaction with the material properties of the material (including metallic and non-metallic) surface treatment, cutting, welding, drilling and micro-processing of a processing technique that involves light, mechanical, electrical, materials and testing and many other subjects

Bicycle with LIDAR

Summer, for bicycle lovers, nothing beats the winding road Sahuan children laps, more people feel comfortable a pleasant. But the road from time to time to jump out of the vehicle it is very hard to detect, no matter how frequently you observe the rearview mirror, even subconsciously always back squint, but it will still be "swishing" exceed scared is not a laser 3000mw car.

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IN THE LAST 20 years, green lasers have shrunk from table-size lab equipment to pocket-portable presentation tools (not to mention cat toys). But making laser pointer 30mw a household item may have come at a cost. A new study from the National Institute of Standards and Technology reports that some cheap laser pointers can emit more than 10 times as much invisible infrared light as bright green light, making them more likely to blind kids and pets.

“It’s a serious problem,” said NIST physicist Charles Clark, a coauthor of the study. “If green goes into your eye, you’ll probably blink because you can see the green. But with infrared, you won’t blink. The first indication that you have that infrared is coming in is that you’d start to lose your vision.”

Luckily, there’s a science fair-worthy way to test your laser pointer for safety. All you need is a digital camera, a webcam, a CD and a few paper cups.

When green laser pointers first hit the market in the 1990s, they would set you back about $400. These days, they go for as low as $7.75 on Amazon. The average pointer makes its bright beam of light in three steps, each of which was a highlight in laser development when it first came out. “It’s like a little lesson on quantum physics all in itself,” Clark said.

The trick is to convert two photons of long-wavelength, low-energy infrared light into one photon of short-wavelength, high-energy green light in a process called frequency doubling. First, two AAA batteries fuel a diode laser — similar to a standard laser pointer 20mw — which emits infrared light at a wavelength of 808 nanometers. That light gets funneled into a crystal of a material called neodymium-doped yttrium orthovanadate, which is common to lab lasers. The crystal’s electrons respond by getting excited and emitting infrared light at 1064 nanometers, which goes through a second crystal made of potassium titanyl phosphate. That crystal combines two infrared photons into one photon with half the wavelength and double the energy, the familiar 532-nanometer green light.

The standard green laser pointer also includes a shield to keep any of the infrared light from escaping. But in the pointer that Clark and his colleagues examined, the shield was entirely missing. There wasn’t even a holder where a shield should be.

“That was a design choice,” said NIST physicist Edward Hagley, a coauthor of the study. “What we think happened is, if one of the suppliers decides to get rid of the filter and save 50 cents, they can reduce the price a little bit and drive everybody out of business. Then everybody else has to do the same thing.”

Hagley noticed the problem when he bought three $15 laser pointer 10mw last December as Christmas presents for his in-laws. Each pointer claimed to emit 10 milliwatts of power, but one of them glowed with a much dimmer green beam. Not only was the dim pointer missing its infrared shield, it also turned out to emit 20 milliwatts of invisible infrared light during normal use. The extra infrared is probably due to a misalignment between the diode laser and the crystals, making the conversion from infrared to green light less efficient.

The total power isn’t that much, about a thousandth of the output of a typical flashlight, Hagley noted. The danger is that laser light is a focused beam of a single wavelength of light, meaning 20 milliwats is enough to burn a hole in your retina before you blink.

“It is a very big safety hazard,” Hagley said. “People who have these laser pointers shouldn’t think they’re safe just because they’re not outputting much green. I know my kids would stick them right in their eyes. And that would be bad.”