Potentiometer is used to adjust resistance: potentiometer is a component that can adjust and change the resistance value arbitrarily, but using potentiometer to adjust resistance is inefficient, the accuracy of resistance control is not easy to control, and the labor cost is large.
Laser trimming resistance substrate by cutting short pulse 10mw laser pointer scanning, the resistor paste layer by laser heating gasification, the formation of a certain depth of the notch, thus changing the conductive cross-sectional area of the resistor body and the conductive length reached to below the target resistance to allow the body repair resistance deviation range, suitable for rapid mass production resistance. Sandblasting and resistance control: the resistance substrate is polished by spraying sand flow, so that the resistance slurry layer is worn, thus changing the conductive section area and the conductive length of the resistor body, and achieving the required resistance. Sand spray resistance is a conventional resistance adjustment scheme. The equipment price is low, but the precision of resistance adjustment is not easy to control, the speed is slow, and it is not easy to automate and batch production. The team uses a beam of laser to capture and move particles, and then controls the laser to create images. They take advantage of a near invisible light field to capture and move small particles and pass them through a space. When particles move, they are irradiated by red, green and blue 500mw laser pointer, and map the surface of the object to make it imaging. When the velocity of the particle moves fast enough, the three-dimensional stereoscopic image will be produced and the color gamut is large and the fineness is high. The speed is a little faster, and the objects in the image look like moving. This image can coexist with the entities in the same physical space and can be seen from any angle, which is not realized by the holographic technology at present. The research team has developed so far the most delicate mirror -- only one atom thick molybdenum selenide (MoSe2) thin section, the miracle of engineering will limit the physical world and a step forward. The researchers said that this thin mirror can be developed for the special sensor is very small, and the use of 50mw laser pointerinformation transmission computer chip. Scientists have explained that if electrons collide with a proton or light particle in the atom, electrons will probably move from the low level orbitals to the high level orbitals, so that an electron hole pair will form in the electric field. When exposed to light at certain wavelengths, the electrons around MoSe2 are likely to jump. The electrons are negatively charged, while the protons in the nuclei are positively charged. Therefore, these electron hole pairs will draw positive charges from the proton, making the behavior of holes behave like particles. The electronically negative electrons in the vicinity attract these "false" particles and, in some cases, pair up to form a quantum mechanical object called excitons. These excitons themselves release light, interact with the incident light and send them back in the way they are incident. In this way, these MoSe2 slices can work like a mirror. According to reports, the ultra-short ultra-short laser in the laboratory to create an unprecedented super-electromagnetic field, ultra-high energy density and ultra-fast time scale comprehensive extreme physical conditions in the desktop accelerator, ultrafast chemistry, attosecond science, materials Science, 200mw laser pointer fusion, nuclear physics and nuclear medicine, laboratory astrophysics and other fields have great application value.
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We all know that besides industrial applications, burning laser pointer technology has been widely used in many fields such as research, biomedicine and communications, which has played a great role in promoting the development of human science and technology.
Scientists have developed the world's first optoelectronic neuromorphic chip The research team from Princeton University in the United States has developed the world's first silicon photonic neuromorphic chip and has proven that it can speed up the operation nearly 2000 times, helping to promote artificial intelligence such as facial recognition, object recognition, natural language processing, machine translation Technical application development. The research team etched each node of the new chip in the form of a mini circular waveguide into a silicon base, allowing light to circulate through it. When light is input to the node, the output of the laser working at the node threshold is modulated, and the output of the high power laser is fed back to the node, creating a feedback circuit with non-linear features. With regard to the extent to which this nonlinear behavior mimics neural behavior, researchers have demonstrated that its output is mathematically equivalent to a "continuous-time recurrent neural network." Researchers used a network of 49 photon nodes to simulate the neural network and used it to solve the mathematical problems of differential equations. They found that this silicon photon neuromorphic chip can compare the arithmetic speed up 1960 times. The world's strongest X-ray laser to create a "mini black hole" The strongest X-ray laser plays an important role in exploring the internal structure and function of matter, and scientists in other countries also explore more unknown fields in this field. Researchers at Kansas State University were surprised to find that when they bombarded a single molecule with the most powerful X-ray laser in the world, a "mini-black hole" emerged. This intense laser destroyed molecules inside and out, leaving only a void, similar to a black hole in space. The researchers hope that this unexpected result may push the overall imaging technology for viruses and bacteria to develop and help scientists develop new drugs. When a molecule is irradiated with Linac Coherent Light Source (LCLS), the molecule loses more than 50 electrons at 30 femtoseconds (in the trillionths of a second), causing it to explode. LCLS is commonly used for the imaging of biological individuals, including viruses and bacteria. The researchers hope that through the experimental results of this molecular black hole, we can make better use of this star laser pointer for more valuable experiments. Lasers make electronic devices no longer dependent on semiconductor materials Scientists from the University of California, San Diego, have developed a new type of microelectronic device that could be replaced by processors made from semiconductor materials in future PCs. Engineers have developed a light-controlled microelectronic device that contains a metamaterial surface made of gold nanotubes. By laser irradiation, the super-surface energy to produce high-intensity electric field. The new microelectronic devices, which do not use semiconductor materials, may solve a difficult problem faced by modern microprocessors. The problem with processors that operate electronically depends on the fact that the electrons collide with atoms constantly, many of which may not be able to migrate to their destination - many electrons are lost during the processor's operation. This new microelectronic device attempts to solve this problem by "mimicking" the old-fashioned vacuum tube - of course on a microscale. Mushroom-shaped nanotubes in the device form Metasurfaces on silicon wafers, both separated by a layer of silicon dioxide. When a low DC voltage is applied and a low-energy infrared 2000mw laser pointer is applied, this structure produces a high-intensity electric field that allows electrons to "migrate" freely. New Laser Writing Technology Upgrades Graphene Structure As we all know, graphene can be used to manufacture a variety of electronic, optoelectronic devices, more scientists predict that graphene will "completely change the 21st century," is likely to set off a worldwide revolution in disruptive new technology and new industries. Researchers from Finland's Jyväskylä University and Taiwan, China, jointly found that laser-writing technology can change the two-dimensional structure of graphene carbon atoms into three-dimensional objects, and the graphene three-dimensional structure material has strong stability, Two-dimensional structure of different electrical and optical properties. The process application is similar to forging a metal into a three-dimensional form with a 3000mw laser pointer beam "hammer." Finally, through experiments and computer simulations, the author realizes that the graphene carbon atom two-dimensional structure to three-dimensional shape of the authenticity and its formation mechanism. In nature, the structure is determined by nature, without exception, the structural characteristics of graphene determines the graphene has a thin and hard, good transmittance, thermal conductivity, high conductivity, structural stability, electron transfer speed and other characteristics. The industry believes that graphene in electronic applications, according to the number of layers can generally be divided into single-layer graphene, double graphene, less graphene and multilayer graphene. Because the excellent properties of graphene will be significantly reduced with the increase of the number of layers, beyond the multi-layer will not have the excellent performance of graphene materials, the application of graphene in the electronics upgrade will lose the advantage. The two-dimensional to three-dimensional structure of the upgrade graphene applications opened up a new direction of application. |
作者简单介绍一下自己。不需要很花哨,概括一下就行。 存档
January 2018
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