Laser holograms will improve the quality of industrial XNUMXD printing. Free Technical Library News

NEWS OF SCIENCE AND TECHNOLOGY, NOVELTY IN ELECTRONICS
Free technical library / timeline

Laser holograms will improve the quality of industrial XNUMXD printing

15.12.2019

One of the shortcomings of modern industrial technologies of laser three-dimensional printing is a strong heating at the point of contact of the metal with the laser light beam. This heating melts the metal powder, but it also introduces areas of internal mechanical stress and deformation of the part to be manufactured. And all these things are practically unpredictable, which makes it impossible to somehow compensate for them. However, a group of researchers from the University of Cambridge found a way to solve the problem described above. With the help of special holographic images generated by a computer using complex algorithms, it is possible to control the distribution of laser light energy in three dimensions, which makes it possible to avoid unnecessary heating of the manufactured part.

"Instead of using a single beam of high-power laser light, we use several beams of laser light that are focused in a specific way at the right point in three-dimensional space," says Professor Tim Wilkinson (Tim Wilkinson), head of this project, - "This allows us to print parts "in a more three-dimensional way and avoid thermal distortion.

The hologram from which the XNUMXD object is printed is calculated and modified by the computer at a rate of about a thousand times per second to improve control over the distribution of energy. At the same time, the algorithms that produce the control hologram take into account a number of subtleties, such as the properties of the materials used, optical distortions, current temperature, etc. "This holographic approach allows us to do things that were previously impossible to do. There are certain types of structures that cannot be printed because of the thermal deformations that occur," says Professor Wilkinson.

Now scientists have already created a pilot plant with three lasers whose beams are reflected from a silicon "microdisplay", a thin layer of liquid crystals on the surface of a silicon chip, which acts as a controlled diffraction grating and changes the phase of the reflected laser light beam. And in the near future, the Cambridge researchers are planning to create a more advanced installation, which will use eight lasers with a total power of 200 W, which is enough to melt particles of aluminum powder.

In addition to testing the operation of liquid crystal microdisplays at this level of laser light power, scientists, using the new facility, will work with metal powders with the addition of plastics and resins to improve the algorithms for compiling control holograms. Plans call for a new and larger plant to start operating in 2020, and the project, which should result in a fully operational industrial plant, will be completed by 2022.

<< Back: Global warming affects the size of birds 16.12.2019

>> Forward: Self-cleaning film repels bacteria 15.12.2019

Latest news of science and technology, new electronics:

The existence of an entropy rule for quantum entanglement has been proven 09.05.2024

Quantum mechanics continues to amaze us with its mysterious phenomena and unexpected discoveries. Recently, Bartosz Regula from the RIKEN Center for Quantum Computing and Ludovico Lamy from the University of Amsterdam presented a new discovery that concerns quantum entanglement and its relation to entropy. Quantum entanglement plays an important role in modern quantum information science and technology. However, the complexity of its structure makes understanding and managing it challenging. Regulus and Lamy's discovery shows that quantum entanglement follows an entropy rule similar to that for classical systems. This discovery opens new perspectives in the field of quantum information science and technology, deepening our understanding of quantum entanglement and its connection to thermodynamics. The results of the study indicate the possibility of reversibility of entanglement transformations, which could greatly simplify their use in various quantum technologies. Opening a new rule ... >>

Mini air conditioner Sony Reon Pocket 5 09.05.2024

Summer is a time for relaxation and travel, but often the heat can turn this time into an unbearable torment. Meet a new product from Sony - the Reon Pocket 5 mini-air conditioner, which promises to make summer more comfortable for its users. Sony has introduced a unique device - the Reon Pocket 5 mini-conditioner, which provides body cooling on hot days. With it, users can enjoy coolness anytime, anywhere by simply wearing it around their neck. This mini air conditioner is equipped with automatic adjustment of operating modes, as well as temperature and humidity sensors. Thanks to innovative technologies, Reon Pocket 5 adjusts its operation depending on the user's activity and environmental conditions. Users can easily adjust the temperature using a dedicated mobile app connected via Bluetooth. Additionally, specially designed T-shirts and shorts are available for convenience, to which a mini air conditioner can be attached. The device can oh ... >>

Energy from space for Starship 08.05.2024

Producing solar energy in space is becoming more feasible with the advent of new technologies and the development of space programs. The head of the startup Virtus Solis shared his vision of using SpaceX's Starship to create orbital power plants capable of powering the Earth. Startup Virtus Solis has unveiled an ambitious project to create orbital power plants using SpaceX's Starship. This idea could significantly change the field of solar energy production, making it more accessible and cheaper. The core of the startup's plan is to reduce the cost of launching satellites into space using Starship. This technological breakthrough is expected to make solar energy production in space more competitive with traditional energy sources. Virtual Solis plans to build large photovoltaic panels in orbit, using Starship to deliver the necessary equipment. However, one of the key challenges ... >>

New method for creating powerful batteries 08.05.2024

With the development of technology and the expanding use of electronics, the issue of creating efficient and safe energy sources is becoming increasingly urgent. Researchers at the University of Queensland have unveiled a new approach to creating high-power zinc-based batteries that could change the landscape of the energy industry. One of the main problems with traditional water-based rechargeable batteries was their low voltage, which limited their use in modern devices. But thanks to a new method developed by scientists, this drawback has been successfully overcome. As part of their research, scientists turned to a special organic compound - catechol. It turned out to be an important component that can improve battery stability and increase its efficiency. This approach has led to a significant increase in the voltage of zinc-ion batteries, making them more competitive. According to scientists, such batteries have several advantages. They have b ... >>

Alcohol content of warm beer 07.05.2024

Beer, as one of the most common alcoholic drinks, has its own unique taste, which can change depending on the temperature of consumption. A new study by an international team of scientists has found that beer temperature has a significant impact on the perception of alcoholic taste. The study, led by materials scientist Lei Jiang, found that at different temperatures, ethanol and water molecules form different types of clusters, which affects the perception of alcoholic taste. At low temperatures, more pyramid-like clusters form, which reduces the pungency of the "ethanol" taste and makes the drink taste less alcoholic. On the contrary, as the temperature increases, the clusters become more chain-like, resulting in a more pronounced alcoholic taste. This explains why the taste of some alcoholic drinks, such as baijiu, can change depending on temperature. The data obtained opens up new prospects for beverage manufacturers, ... >>

Random news from the Archive

Caterpillar saliva against plastic 17.10.2022

Today, the world is literally suffocating under mountains of plastic: river banks are littered with perennial rubbish, and entire garbage "islands" float in the oceans. Existing waste recycling methods cannot cope with the amount of plastic produced, so scientists are constantly looking for new ways to dispose of it, including in the saliva of moth caterpillars.

People produce about 400 tons of plastic a year, and despite all efforts to reduce its use and recycle, a huge amount of undecomposed garbage ends up in landfills. About a third of it is polyethylene, a tough plastic that takes five to 15 years to completely decompose without human intervention.

Previously, experts conducted studies on the effect on polyethylene of various microorganisms that can accelerate its decomposition. However, in all cases it was about months of processing. But now scientists have discovered an animal that can literally digest a plastic bag in just a few hours.

The "devourer" of polyethylene turned out to be a creature that, under normal conditions, is accustomed to eating wax and honey - a caterpillar of a large wax moth (Galleria mellonella). This feature of caterpillar saliva was discovered by accident when one of the researchers, a fierce beekeeper, collected the pests that had bred in the hive in a plastic bag, but after a few hours she found only a lot of holes in the empty bag. Having studied the bag in the laboratory, the scientists realized that the caterpillars did not gnaw through the polyethylene, but dissolved it: the edges of the holes were oxidized, as if someone had treated them with acid.

See full Archive of science and technology news, new electronics

All languages of this page

Home page | Library | Articles | Website map | Site Reviews