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A directed-energy weapon (DEW) emits highly focused energy, transferring that energy to a target to damage it. Potential applications of this technology include anti-personnel weapon systems, potential missile defense system, and the disabling of lightly armored vehicles such as cars, drones, jet skis, and electronic devices such as mobile phones.〔("Daily Telegraph, 12th September 2013" ), ''Golden Eye-style energy beam is developed by Nato scientists'', Oct. 08, 2013〕〔("Milsat Magazine, Satnews Daily, June 24th 2009" ), ''U.S. Navy Laser Versus UAVs... Laser Wins...'', Oct. 08, 2013〕 The energy can come in various forms: * Electromagnetic radiation, including radio frequency, microwave, lasers and masers * Particles with mass, in particle-beam weapons (technically a form of micro-projectile weapon) * Sound, in sonic weapons ==Operational advantages== Laser weapons could have several main advantages over conventional weaponry: * DEWs can be used discreetly as radiation above and below the visible spectrum is invisible.〔("Defence IQ talks to Dr Palíšek about Directed Energy Weapon systems" ), ''Defence iQ', Nov. 20, 2012〕〔(Spectrum Tutorial ), University of Wisconsin Electromagnetic Spectrum Tutorial, accessed 22/06/2013〕 * Laser beams travel at the speed of light, so evading an accurately aimed laser after it has been fired is impossible. Consequently, there is no need to compensate for target movement (except over ''extremely'' long distances). * Light is only very slightly affected by gravity, so that long-range projection requires virtually no compensation. Other aspects such as wind speed can be neglected at most times, unless shooting through an absorptive matter. * Lasers can change focusing configuration to provide an active area that can be much smaller or larger than projectile weaponry and fire at multiple targets simultaneously. * Given a sufficient power source, laser weapons could essentially have limitless ammunition. * Because light has a practically zero ratio of momentum to energy (exactly ), lasers produce negligible recoil. * Lasers and particle beams can be fired off axis without physically moving the beam emitter. * Laser beams do not generate sound, so the weapon would not betray its user's position when fired. * Lasers and particle beams can not be deflected or intercepted with point defense hard-kill countermeasures. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Directed-energy weapon」の詳細全文を読む スポンサード リンク
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