A laser is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation. The word...

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(/ˈlaɪdɑːr/, also LIDAR, LiDAR or LADAR, an acronym of "light detection and ranging" or "laser imaging, detection, and ranging") is a method for determining...

Laser cooling includes several techniques where atoms, molecules, and small mechanical systems are cooled with laser light. The directed energy of lasers...

Low-level laser therapy (LLLT), cold laser therapy, photobiomodulation (PBM) or red light therapy is a form of medicine that applies low-level (low-power)...

A laser lighting display or laser light show involves the use of laser light to entertain an audience. A laser light show may consist only of projected...

Since even relatively small amounts of laser light can lead to permanent eye injuries, the sale and usage of lasers is typically subject to government regulations...

A laser diode (LD, also injection laser diode or ILD or semiconductor laser or diode laser) is a semiconductor device similar to a light-emitting diode...

chemicals present. In essence, a laser generates a beam of light that requires clear air or a vacuum to operate. Many types of laser have been identified as having...

A laser rangefinder, also known as a laser telemeter, is a rangefinder that uses a laser beam to determine the distance to an object. The most common form...

scatter light. A collimated beam from a laser source is most often used, in which case the technique can be referred to as multiangle laser light scattering...

a laser light, image processing and communication to improve the accuracy of guidance. The key idea is to show goal positions to the robot by laser light...

Under certain conditions, laser light or other bright lights (spotlights, searchlights) directed at aircraft can be a hazard. The most likely scenario...

of laser spectroscopy are discussed by Demtröder. Most types of laser are an inherently pure source of light; they emit near-monochromatic light with...

objects or scenes. Optical holography needs a laser light to record the light field. The reproduced light field can generate an image that has the depth...

A laser microphone is a surveillance device that uses a laser beam to detect sound vibrations in a distant object. It can be used to eavesdrop with minimal...

The CO2 laser produces a beam of infrared light with the principal wavelength bands centering on 9.6 and 10.6 micrometers (μm). The active laser medium...

includes laser-powered launches and laser light sails, eliminates the need for the spacecraft to carry its own energy source. Onboard laser propulsion...

photorejuvenation, and laser surgery. The word laser stands for "light amplification by stimulated emission of radiation". The laser was invented in 1960 by Theodore...

A laser pointer or laser pen is a (typically battery-powered) handheld device that uses a laser diode to emit a narrow low-power visible laser beam (i...

may produce such spikes. The speckle pattern which is observed when laser light falls on an optically rough surface is also a diffraction phenomenon...

of the LED light source is 50,000 to 100,000 hours, compared to about 1,000 hours for a filament source. Experimental installations of laser lights, either...

A Raman laser is a specific type of laser in which the fundamental light-amplification mechanism is stimulated Raman scattering. In contrast, most "conventional"...

gas laser is a laser in which an electric current is discharged through a gas to produce coherent light. The gas laser was the first continuous-light laser...

through gas Ion laser – Type of gas laser Laser diode – Semiconductor laser Laser excited phosphor – Devices and processes that produce lightPages displaying...

formed by reflecting light off an existing document onto the exposed drum. The laser printer was invented at Xerox PARC in the 1970s. Laser printers were introduced...

ultraviolet ("black light") spectrum (wavelengths less than 400 nm). Prior to the 1960s and until the late 1990s, gas and argon-ion lasers were common and...

Laser hair removal is the process of hair removal by means of exposure to pulses of laser light that destroy the hair follicle. It had been performed...

monochromatic light, usually from a laser in the visible, near infrared, or near ultraviolet range is used, although X-rays can also be used. The laser light interacts...

a laser can be made to produce pulses of light of extremely short duration, on the order of picoseconds (10−12 s) or femtoseconds (10−15 s). A laser operated...