laser - definição. O que é laser. Significado, conceito
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O que (quem) é laser - definição

DEVICE WHICH EMITS LIGHT VIA OPTICAL AMPLIFICATION
Lase; LASER; Light amplification by stimulated emission of radiation; Coherent radiation; Laser beam; Light Amplification By Simulated Emission Of Radia; Light Amplification by Stimulated Emission of Radiation; Light amplification by simulated emission of radiation; Laser light; Laser beams; Green laser; Lasing; Microlaser; Laserbeams; Laser Radiation; Laser heater; Active species; Lasrs; Laser-shooting; L.A.S.E.R.; Lazers; Optical maser; Battery powered laser; Lasers; Optical oscillator; Laser pulse; Laser treatment for tattoos; Laser treatment; Light Amplification By Stimulated Emission; Light Amplification By Stimulated Emission Of Radiation; Light Amplification of Stimulated Emission of Radiation; Light Amplification; Light Amplification by Stimulated Emissions of Radiation; Continuous wave laser; Continuous-wave laser; Optical laser; Laser oscillation; Infrared laser; Medical uses of lasers
  • Aleksandr Prokhorov]]
  • [[Charles H. Townes]]
  • Close-up of a table-top dye laser based on [[Rhodamine 6G]]
  • Wavelengths of commercially available lasers. Laser types with distinct laser lines are shown above the wavelength bar, while below are shown lasers that can emit in a wavelength range. The color codifies the type of laser material (see the figure description for more details).
  • CD]] or [[DVD player]]
  • The free-electron laser ''FELIX'' at the FOM Institute for Plasma Physics Rijnhuizen, [[Nieuwegein]]
  • '''LASER notebook:''' First page of the notebook wherein [[Gordon Gould]] coined the acronym LASER, and described the elements required to construct one. Manuscript text: "Some rough calculations on the feasibility / of a LASER: Light Amplification by Stimulated / Emission of Radiation. /
Conceive a tube terminated by optically flat / [Sketch of a tube] / partially reflecting parallel mirrors..."
  • Spectrum of a helium–neon laser. The actual bandwidth is much narrower than shown; the spectrum is limited by the measuring apparatus.
  • Graph showing the history of maximum laser pulse intensity since 1960
  • Animation explaining stimulated emission and the laser principle
  • Laser beam}}
  • overexposed]] there.
  • Lasers range in size from microscopic [[diode laser]]s (''top'') with numerous applications, to football field sized [[neodymium]] glass lasers (bottom) used for [[inertial confinement fusion]], [[nuclear weapon]]s research and other high energy density physics experiments
  • point to point]] optical wireless network
  • Red (660 & 635 nm), green (532 & 520 nm), and blue-violet (445 & 405 nm) lasers
  • welding]]
  • Laser application in astronomical [[adaptive optics]] imaging
  • Mercury Laser Altimeter (MLA) of the [[MESSENGER]] spacecraft
  • Clementine]] mission
  • FASOR]], based on a Nd:YAG laser, used at the [[Starfire Optical Range]]
  • upright=2
  • Tactical High Energy weapon]] has been used to shoot down rockets and artillery shells

laser         
<hardware> (Light Amplification by Stimulated Emission of Radiation) The type of light source used in a {laser printer}. (2003-05-08)
LASER         
Light Amplification by Stimulated Emission of Radiation
laser         
(lasers)
1.
A laser is a narrow beam of concentrated light produced by a special machine. It is used for cutting very hard materials, and in many technical fields such as surgery and telecommunications.
...new laser technology...
N-COUNT
2.
A laser is a machine that produces a laser beam.
...the first-ever laser, built in 1960.
N-COUNT

Wikipédia

Laser

A laser is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation. The word laser is an anacronym that originated as an acronym for light amplification by stimulated emission of radiation. The first laser was built in 1960 by Theodore Maiman at Hughes Research Laboratories, based on theoretical work by Charles H. Townes and Arthur Leonard Schawlow.

A laser differs from other sources of light in that it emits light that is coherent. Spatial coherence allows a laser to be focused to a tight spot, enabling applications such as laser cutting and lithography. Spatial coherence also allows a laser beam to stay narrow over great distances (collimation), enabling applications such as laser pointers and lidar (light detection and ranging). Lasers can also have high temporal coherence, which allows them to emit light with a very narrow spectrum. Alternatively, temporal coherence can be used to produce ultrashort pulses of light with a broad spectrum but durations as short as a femtosecond.

Lasers are used in optical disc drives, laser printers, barcode scanners, DNA sequencing instruments, fiber-optic, and free-space optical communication, semiconducting chip manufacturing (photolithography), laser surgery and skin treatments, cutting and welding materials, military and law enforcement devices for marking targets and measuring range and speed, and in laser lighting displays for entertainment. Semiconductor lasers in the blue to near-UV have also been used in place of light-emitting diodes (LEDs) to excite fluorescence as a white light source. This permits a much smaller emitting area due to the much greater radiance of a laser and avoids the droop suffered by LEDs; such devices are already used in some car headlamps.

Exemplos do corpo de texto para laser
1. Yes, but not for much longer LASER JAMMER / DIFFUSER Target Laser Track 400 – 34'.''. WHAT IT DOES Sends out a signal to confuse laser guns, which then display an error code.
2. Syneron makes laser technology for cosmetic applications.
3. Samsung Laser Printer Samsung Electronics introduced its new ML–2851ND monochrome laser printer series that is specifically targeted for small–size businesses and SOHO users.
4. It emits laser light of two wavelengths in order to outwit laser safety goggles, which generally block out only one wavelength.
5. A laser–guided bomb is a precision–guided weapon that uses semi–active laser homing to strike a designated target with greater accuracy than a free–fall bomb.