Engineering
Powder-based laser beam melting (LPPF) is probably the best-known AM process and has great potential for industrial applications. But how can the limited range of materials for this process be circumvented and the market ...
Jul 25, 2022
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31
Engineering
NIMS and Osaka University Graduate School of Engineering have succeeded in fabricating a nickel single crystal with only a very few crystalline defects by irradiating nickel powder with a large-radius, flat-top laser beam ...
Jul 12, 2022
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30
Software
Vibrations during 3D printing either slow down the process or warp the parts, but new software could enable manufacturers to keep up the speed without sacrificing accuracy.
May 17, 2022
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35
Energy & Green Tech
Until now, wastewater treatment plants have not been able to sufficiently filter out tiny microplastics in wastewater, but this could soon change: The first laser-drilled microplastic filter is being tested in a wastewater ...
Apr 01, 2022
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27
Engineering
Even though robots don't have eyes with retinas, the key to helping them see and interact with the world more naturally and safely may rest in optical coherence tomography (OCT) machines commonly found in the offices of ophthalmologists.
Mar 29, 2022
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117
Internet
A team of researchers at Alphabet's research and development company, X, working on what has been named Project Taara, has successfully set up a laser-based system for beaming the internet across the Congo River at speeds ...
Sep 17, 2021 report
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122
Engineering
Additive manufacturing has the potential to allow one to create parts or products on demand in manufacturing, automotive engineering, and even in outer space. However, it's a challenge to know in advance how a 3D printed ...
Jul 01, 2021
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18
Engineering
Free-space optical (FSO) communications has the potential for wide use in the license-free, interference-free transmission of data in unenclosed areas. By using laser beams to propagate through an open-air medium, FSO transmission ...
May 07, 2021
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5
Consumer & Gadgets
House key, wallet, health insurance card, hotel key card—a smart finger ring could replace all these in the future. Produced by a 3D printing process, the ring has an integrated RFID chip, tamper-proof, sealed and invisible. ...
May 03, 2021
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9
Robotics
Minimally invasive surgeries in which surgeons gain access to internal tissues through natural orifices or small external excisions are common practice in medicine. They are performed for problems as diverse as delivering ...
Jan 13, 2021
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25
A laser is a device that emits light (electromagnetic radiation) through a process called stimulated emission. The term laser is an acronym for light amplification by stimulated emission of radiation. Laser light is usually spatially coherent, which means that the light either is emitted in a narrow, low-divergence beam, or can be converted into one with the help of optical components such as lenses. Typically, lasers are thought of as emitting light with a narrow wavelength spectrum ("monochromatic" light). This is not true of all lasers, however: some emit light with a broad spectrum, while others emit light at multiple distinct wavelengths simultaneously. The coherence of typical laser emission is distinctive. Most other light sources emit incoherent light, which has a phase that varies randomly with time and position.
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