Engineering
In May 2022, the TeraByte InfraRed Delivery (TBIRD) payload onboard a small CubeSat satellite was launched into orbit 300 miles above Earth's surface. Since then, TBIRD has delivered terabytes of data at record-breaking rates ...
Dec 1, 2022
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144
Robotics
Scientists from the Department of Mechanical Engineering at Osaka University introduced a method for manufacturing complex microrobots driven by chemical energy using in situ integration. By 3D-printing and assembling the ...
Nov 17, 2022
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45
Security
Self-driving cars, like the human drivers that preceded them, need to see what's around them to avoid obstacles and drive safely.
Oct 31, 2022
4
266
Engineering
Whether in photosynthesis or in a photovoltaic system: If you want to use light efficiently, you have to absorb it as completely as possible. However, this is difficult if the absorption is to take place in a thin layer of ...
Aug 29, 2022
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12
Engineering
Russia is building a new ground-based laser facility for interfering with satellites orbiting overhead, according to a recent report in The Space Review. The basic idea would be to dazzle the optical sensors of other nations' ...
Jul 27, 2022
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6
Software
Three-dimensional (3D) mapping is a very useful tool, such as for monitoring construction sites, tracking the effects of climate change on ecosystems and verifying the safety of roads and bridges. However, the technology ...
May 19, 2022
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72
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
Engineering
Researchers at Harvard University and China University of Petroleum recently developed dynamic speckle holography (DSH), a new technique to measure three-dimensional (3D) maps of displacements that combines imaging and scattering ...
Electronics & Semiconductors
The photovoltaic effect of ferroelectric crystals can be increased by a factor of 1,000 if three different materials are arranged periodically in a lattice. This has been revealed in a study by researchers at Martin Luther ...
Jul 20, 2021
3
2140
Robotics
A team of researchers from the University of Toronto and Lunenfeld-Tanenbaum Research Institute, has developed a technique for controlling the movements of a live nematode using laser light. In their paper published in the ...
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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