helium-neon laser


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helium-neon laser

[′hē·lē·əm ¦nē‚än ′lā·zər]
(optics)
An atomic gas laser in which a combination of helium and neon gases is used.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
By adjusting the CCD camera position, we can locate the position of the focal point of the helium-neon laser beam and we can measure the focal length of the thermal lens.
Abrahamse, "Irradiation with a 632.8 nm helium-neon laser with 5 J/[cm.sup.2] stimulates proliferation and expression of interleukin-6 in diabetic wounded fibroblast cells," Diabetes Technology and Therapeutics, vol.
At INP, the study of lasers with direct nuclear pumping began in 1980 after the appearance of several publications regarding the creation of low-threshold lasers: these publications concerned an Ar-Xe mixture with a lasing threshold of 8 x [10.sup.12] n/[cm.sup.2]s [6] and continuous helium-neon lasers at neutron fluxes of 2 x [10.sup.11] n/[cm.sup.2] s [7].
Effect of low-level helium-neon laser therapy on histological and ultrastructural features of immobilized rabbit articular cartilage.
Instead of a dynamic Michelson interferometer with moving mirrors, it has a static, fiber-based Mach-Zehnder interferometer, and in place of a Helium-Neon laser, it uses a NIST-traceable gas-absorption cell.
The inspection technique being developed by Argonne uses a low-power helium-neon laser, similar to those found in grocery checkout counters.
TABLE SUMMARY OF COMPLEMENTARY/ALTERNATIVE THERAPIES FOR FIBROMYALGIA Level of Therapy Evidence(*) Benefit([dagger]) Acupuncture 1b (++) Biofeedback 1b (+) S-adenosyl methionine (SAMe) 1b (+) Balneotherapy (spa treatment) 4 (+) Hypnotherapy 4 (+) Massage 4 (+) Meditation 4 (+) Bright light treatment 1b 0 Low-output helium-neon laser 1b 0 Malic acid 200 mg and magnesium 50 mg orally 3 times daily 1b 0 Rheumajecta and Vasolastine injections 1b 0 Selenium 100 (g orally daily in tow soil selenium area 1b 0 60 to 300 hz musical vibrations 2b 0 Chiropractic management 4 0 (*) Centre for Evidence-Based Medicine (cebm.jr2.ox.ac.uk/docs/levels.htm) where 1a is best and 5 is worst.
Of the recommended radiations, that of the iodine-stabilized helium-neon laser is the most widely used for practical realization of the meter.
The computer-to-plate imager comes with either a helium-neon laser for red-sensitive silver-halide metal plates or frequency-doubled YAG laser for green-sensitive sliver-halide or photopolymer plates.
Common exciting wavelengths are 488.0 and 514.5 nm from an argon ion laser, 614.7 nm from a krypton laser and 632.8 nm from a helium-neon laser. The laser exciting line occurs in the spectrum as Rayleigh scattering.
In this system, the beam from a helium-neon laser in the vibrometer's sensor head probes the test object's surface, reflecting back to the sensor head, where it is analyzed in a Michelson interferometer.