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Wrong Laser Aimed at Crowd

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ORLANDO, Fla., July 24, 2008 -- A powerful pulsed laser intended for overhead use only was pointed into a crowd attending a music festival outside Moscow earlier this month, allegedly causing retina damage in dozens of people. A pulsed laser can be up to 100 times more powerful than those recommended for aiming into an audience and never should have been allowed, according to the head of the International Laser Display Association (ILDA). ILDA Executive Director Patrick Murphy said the dotted-line beam pattern in a video taken at the Aquamarine techno music festival and posted by Russian news agency NTV on its Web...Read full article

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    Published: July 2008
    Glossary
    continuous wave
    Continuous wave (CW) refers to a type of signal or transmission where the signal is constant and does not vary with time. In various contexts, the term is used to describe continuous, uninterrupted oscillations or waves. Here are a few applications of the term in different fields: Electromagnetic waves: In radio communication and radar systems, a continuous wave signal is a steady oscillation of radio frequency (RF) energy. It does not involve modulation, which means the amplitude,...
    light
    Electromagnetic radiation detectable by the eye, ranging in wavelength from about 400 to 750 nm. In photonic applications light can be considered to cover the nonvisible portion of the spectrum which includes the ultraviolet and the infrared.
    photonics
    The technology of generating and harnessing light and other forms of radiant energy whose quantum unit is the photon. The science includes light emission, transmission, deflection, amplification and detection by optical components and instruments, lasers and other light sources, fiber optics, electro-optical instrumentation, related hardware and electronics, and sophisticated systems. The range of applications of photonics extends from energy generation to detection to communications and...
    retina
    1. The photosensitive membrane on the inside of the human eye. 2. A scanning mechanism in optical character generation.
    AquamarineBiophotonicsConsumercontinuous wavedamagefestivalILDAindustrialInternational Laser Display AssociationKommersantlaser showlightmedicalMoscowNd:YAGNews & FeaturesNTVPatrick Murphyphotonicspulsed lasersretinaRussiasafetyTechno

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