All articles starting with L

Laser interstitial thermal therapy

Laser interstitial thermal therapy (LITT) is a minimally invasive neurosurgical procedure in which a laser fiber, inserted through a small skull opening, destroys brain tumors, radiation necrosis, or epileptic foci under real-time MRI temperature monitoring.

Laser linewidth

Laser linewidth is the width of a laser's optical spectrum, reported as full width at half maximum and serving as a measure of the laser's phase noise.

Laser linewidth measurement

Laser linewidth measurement is the experimental determination of the spectral width of a laser's optical emission, set mainly by phase jitter, using interferometric and phase-noise techniques.

Laser lithography

Laser lithography is a maskless microfabrication technique that uses a focused laser beam to pattern photoresists and substrates directly, from nanometer features to centimeter-scale 3D structures.

Laser lithotripsy

Laser lithotripsy is an endourological procedure that fragments kidney, ureteral, or bladder stones by delivering pulsed laser energy through an optical fiber inside a ureteroscope or nephroscope.

Laser machining

Laser machining is a subtractive manufacturing process that cuts, drills, mills, and scribes material with a focused laser beam without touching the workpiece, so there is no tool wear.

Laser mass spectrometry

Laser mass spectrometry is an umbrella term for mass spectrometry methods using lasers to desorb, ablate, or ionize samples, including MALDI, LIMS, and laser ablation ICP-MS.

Laser medicine

Laser medicine, also called laser therapy, is the use of lasers to diagnose and treat disease, most often by cutting, destroying, or coagulating tissue or activating light-sensitive drugs.

Laser Mégajoule

Laser Mégajoule (LMJ) is France's large inertial confinement fusion laser facility at CEA Cesta near Bordeaux, inaugurated in 2014 to help certify the nuclear deterrent without underground testing.

Laser melting deposition

Laser melting deposition is a metal additive manufacturing process in which a laser melts powder or wire onto a substrate to build dense layers for coatings, repair, and fabrication.

Laser metal deposition

Laser metal deposition (LMD) is an additive manufacturing process that uses a laser to melt metal powder or wire onto parts, building or repairing them layer by layer.

Laser micromachining

Laser micromachining is a manufacturing method that uses focused laser beams to remove material and fabricate microscale features such as holes, channels, and surface textures in metals, polymers, and ceramics.

Laser Mission

Laser Mission (1989), also released as Soldier of Fortune and Battle Dragon, is a West German-South African-US direct-to-video action film directed by BJ Davis, starring Brandon Lee as a CIA agent rescuing laser expert Ernest Borgnine from the KGB; it contains no lasers.

Laser peening

Laser peening is a surface treatment that uses laser-generated shock waves to leave deep compressive stress in metal, improving fatigue life and corrosion resistance in jet engine blades and landing gear.

Laser photocoagulation

Laser photocoagulation is an outpatient eye procedure in which a focused laser seals retinal leaks or destroys abnormal tissue, mainly treating diabetic retinopathy and retinal tears.

Laser pointer

A laser pointer, also called a laser pen, is a hand-held laser used to point during lectures, astronomy, and construction; US regulation limits visible output to 5 milliwatts.

Oct 22, 2026

Laser polishing of additively manufactured surfaces

Laser polishing of additively manufactured surfaces is a non-contact method in which a laser remelts a thin layer of a 3D-printed metal part, letting surface tension smooth roughness.

Oct 22, 2026

Laser powder bed fusion of bulk metallic glasses

Laser powder bed fusion of bulk metallic glasses is an additive manufacturing method that builds amorphous metal parts by laser-melting alloy powder layer by layer.

Laser printing

Laser printing is an electrophotographic process in which a laser writes an image onto a charged drum, which dry toner develops and heat fuses to paper.

Laser pyrolysis

Laser pyrolysis is a materials synthesis method that uses a CO2 laser to decompose gaseous or liquid precursors into high-purity nanoparticles, typically 5 to 30 nm.

Laser Radial

The Laser Radial, designated ILCA 6 since the class was renamed ILCA in 2019, is a smaller-sailed rig for the Laser dinghy, the Olympic women's single-handed dinghy since 2008.

Laser rangefinder

A laser rangefinder, also called a laser distance meter, measures distance by timing a laser pulse's round trip to a target, from handheld meters to satellite altimeters.

Laser ranging

Laser ranging measures distances by firing short laser pulses at retroreflector-equipped satellites, the Moon, or spacecraft and timing the reflected light, underpinning Earth's reference frame and tests of general relativity.

Laser resurfacing

Laser resurfacing is a dermatologic procedure using CO2 and Er:YAG lasers to remove or heat skin layers, treating wrinkles, acne scars, and photoaging, with fractional ablative CO2 considered the gold standard.

Laser safety

Laser safety, also called laser radiation safety, is the practice of preventing eye and skin injury from laser radiation through classification, controls, and protective eyewear.

Laser scanning cytometry

Laser scanning cytometry (LSC) is a slide-based technique in which lasers scan cells on a microscope slide, producing per-cell fluorescence data comparable to flow cytometry.

Laser seam tracking

Laser seam tracking is a robotic welding technique in which a laser vision sensor measures the joint between workpieces and guides the torch along the actual seam.

Laser speckle flowgraphy

Laser speckle flowgraphy (LSFG) is a noninvasive optical imaging method that maps blood flow in the ocular fundus by measuring how moving red blood cells blur a laser speckle pattern.

Laser surface texturing

Laser surface texturing (LST) is a laser process that creates precise micro-scale dimples and grooves on surfaces to reduce friction and wear in mechanical seals, bearings, and piston rings.