laser

[la´zer]

a device that transfers light of various frequencies into an extremely intense, small, and nearly nondivergent beam of monochromatic radiation in the visible or invisible spectrum, with all the waves in phase; capable of mobilizing immense heat and power when focused at close range, lasers act on tissues by photocoagulation and photodisruption and are used in surgery, in diagnosis, and in physiological studies.

argon laser a laser with ionized argon as the active medium and with a beam in the blue and green visible light spectrum; used for photocoagulation.

carbon-dioxide laser a laser with carbon dioxide gas as the active medium and that produces infrared radiation at 10,600 nm; used to excise and incise tissue and to vaporize.

excimer laser (excited dimer) a laser with rare gas halides as the active medium, used in ophthalmological procedures and angioplasty. The beam is in the ultraviolet spectrum and penetrates tissues only a small distance; it breaks chemical bonds instead of generating heat to destroy tissue.

holmium:YAG laser a laser whose active medium is a crystal of yttrium, aluminum, and garnet doped with holmium ions, and whose beam is in the near infrared spectrum at 2100 nm; used for photocoagulation and photoablation.

neodymium:yttrium-aluminum-garnet (Nd:YAG) laser a laser whose active medium is a crystal of yttrium, aluminum, and garnet doped with neodymium ions, and whose beam is in the near infrared spectrum at approximately 1060 nm; used for photocoagulation and photoablation.

argon laser

laser used for ophthalmic procedures, including retinal photocoagulation and trabeculoplasty, consisting of photons in the blue (488 nm) or green (514 nm) spectrum.

Farlex Partner Medical Dictionary © Farlex 2012

ar·gon la·ser

(ahr'gon lā'zĕr)

Laser used for ophthalmic procedures, including retinal photocoagulation and trabeculoplasty, consisting of photons in the blue (488 nm) or green (514 nm) spectrum.

Medical Dictionary for the Health Professions and Nursing © Farlex 2012

argon laser

A low-powered LASER widely used in ophthalmology.

Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005

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References in periodicals archive

The three different light sources used were a halogen lamp (Optilux 501/ Demetron-Kerr/ serial number: 5815687), a LED (Lec MMOptics/ prototype) and an argon ion laser (INNOVA-100/Coherent/ serial number: 3240).

The effect of different photoactivation sources on a nanocomposite resin: LED, halogen and argon laser application/O efeito de diferentes fontes de fotoativacao em uma resina de nanoparticulas: aplicacao de LED, halogeneo e laser de argonio

In order to provide an experimental test of this assertion, we have measured the average pitch of a Cr sample by observing the diffraction of 351.1 nm laser light from an argon ion laser. These measurements show good agreement between the expected and actual pitch within the stated uncertainty, adding confidence to our belief that laser-focused atomic deposition can produce robust nanoscale pitch standards.

Accuracy of nanoscale pitch standards fabricated by laser-focused atomic deposition

According to MiraiBio, it is the first scanner to only use solid-state lasers, providing a stable, faster and more reliable scan compared to gas ion lasers. The FMBIO III uses a 50 mW solid-state 532 nm YAG laser and a 10 mW solid state 635 nm laser and the FMBIO Plus adds a solid state 20 mW 488 nm laser.

Lasers stimulate new analytical approaches

The most common gas lasers are the helium neon laser, the argon ion laser and the [CO.sub.2] laser.

Of masers, lasers and optical fiber

Dr Marianna Goldrick, who will be representing Bioo Scientific at Gyeonggi-UT Innovation Program Signing Ceremony, stated that “Bioo Scientific is enthusiastic about building a product line of kits designed to leverage the abilities of the ION Laser Microdissection Device developed by Jungwoo F&B.

Bioo Scientific and Jungwoo F&B to Collaborate to Improve Cancer Diagnosis and Treatment

The photolysis light source was a Coherent Innova 90 Argon Ion laser. Fluorescence was measured using an ISS Phase Modulated Spectrofluorometer.

Section II: Chemistry

Since the measurements were carried out with low power from an Ar ion laser ([less than or equal to] 0.5 mW) and a flow cell to minimize photodegradation effects, any other light source including room light would contribute to the spectral background which might not be subtracted fully due to the heterogeneity of leukocyte suspensions.

Quantitating fluorescence intensity from fluorophores: practical use of MESF values

A medium power argon ion laser, operating in the blue-green portion of the EM spectrum, was selected for angular tracking of the targets.

A laser radar experiment

The Centre has its own origination equipment but also shares resources with the KUST Laser Institute, which has a 4-Joule pulse ruby laser, a 5W Argon ion laser, a YAG laser, several HeNe lasers from 10-100mW and two holography tables.

Kunming Holographic Art Centre

Intense ultraviolet light from an argon ion laser, directed through the pipette, illuminates the anthracene crystal, generating exitons that diffuse through the material.

Putting a far finer point on visible light

Holograms are designed, mastered, electroformed, embossed and finished inhouse, with a Krypton ion laser for mastering.

Holotopia Expansion Follows First Profitable Year

Mounted in one of the shuttle's windows was a "retro-reflector,' designed to reflect a low-powered (4-watt) argon ion laser beam, aimed by a computer, directly back to its point of origin on Maui, Hawaii.

Shuttle: 4 for 4 and SDI too