Engineering
Our roads might one day be safer thanks to a completely new type of system that overcomes some of lidar's limitations. Lidar, which uses pulsed lasers to map objects and scenes, helps autonomous robots, vehicles and drones ...
Feb 9, 2023
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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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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
Every time you flush a toilet, it releases plumes of tiny water droplets into the air around you. These droplets, called aerosol plumes, can spread pathogens from human waste and expose people in public restrooms to contagious ...
Dec 11, 2022
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6
Engineering
Devising the best treatment for a patient with cancer requires doctors to know something about the traits of the cancer from which the patient is suffering. But one of the greatest difficulties in treating cancer is that ...
Apr 2, 2019
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74
Engineering
NASA's first two-way laser relay system completed its first year of experiments on June 28—a milestone for a game-changing technology that could be the future for sending and receiving data from space.
Jun 29, 2023
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1
Hi Tech & Innovation
How do you decide whether a pedestrian needs to wait or it's safe to cross the road in front of a car? In today's world, drivers and pedestrians simply exchange a brief eye contact or small hand gestures to express their ...
Jun 1, 2023
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22
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 ...
Hi Tech & Innovation
Sony and Yamaha have collaborated to bring out an autonomous vehicle that goes big on carrying the fruits of Sony's imaging technologies. This vehicle was officially announced as a joint development with Yamaha Motor Co. ...
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
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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