News tagged with laser

Related topics: light · laser beam · atoms · wavelength · nature photonics

Laser alone or with peel effective for mixed melasma

(HealthDay)—Low-fluence Q-switched Nd-YAG laser alone or with modified Jessner's peel are equally effective regimens for mixed melasma hyperpigmentation, according to a study published online Oct. 22 in the Journal of Cosmetic ...

Nov 01, 2017
popularity0 comments 0

New focus on correcting refractive vision

While doctors take delight in solving the common issue of refractive vision error by prescribing eye glasses, Flinders University researchers have found that many patients are upset with this solution and claim it affects ...

Oct 25, 2017
popularity100 comments 0

Laser

A laser is a device that emits light (electromagnetic radiation) through a process called stimulated emission. The term laser is an acronym for light amplification by stimulated emission of radiation. Laser light is usually spatially coherent, which means that the light either is emitted in a narrow, low-divergence beam, or can be converted into one with the help of optical components such as lenses. Typically, lasers are thought of as emitting light with a narrow wavelength spectrum ("monochromatic" light). This is not true of all lasers, however: some emit light with a broad spectrum, while others emit light at multiple distinct wavelengths simultaneously. The coherence of typical laser emission is distinctive. Most other light sources emit incoherent light, which has a phase that varies randomly with time and position.

This text uses material from Wikipedia, licensed under CC BY-SA

Subscribe to rss feed