active medium
71circular dichroism — noun Date: circa 1961 1. the property (as of an optically active medium) of unequal absorption of right and left plane polarized light so that the emergent light is elliptically polarized 2. a spectroscopic technique that makes use of …
72Irish terrier — noun Date: 1857 any of a breed of active medium sized terriers characterized by a dense close usually reddish wiry coat …
73Quantum noise — is uncertainty of some physical quantity due to its quantum origin.In the case of number of particles (photons or electrons), the quantum noise is also called shot noise. Most optical communications use amplitude modulation. In this case, the… …
74Laser TV — is a new video display technology using laser optoelectronics.HistoryProposed as long ago as 1966 [cite web url=http://www.insightmedia.info/reportinfo.php?2006laser title=2006 Laser Projection Systems Report publisher=… …
75Adjustable focus — eyeglasses compensate for the effects of presbyopia, lack of focusing, by providing on demand clarity at any desired distance.Two approaches can be found in the literature: electro optical (often utilizing liquid crystals as the active medium)… …
76laser diode — noun A laser whose active medium is a form of light emitting diode …
77Excimer laser — A laser that emits very concentrated light in the ultraviolet (UV) region of the spectrum. Excimer lasers are used in medicine. For examples, In ophthalmology to vaporize part of the surface layer of the cornea and thus reshape the cornea to… …
78circular dichroism — n 1) the property (as of an optically active medium) of unequal absorption of right and left plane polarized light so that the emergent light is elliptically polarized 2) a spectroscopic technique that makes use of circular dichroism …
79dye laser — n a laser in which light is emitted by a fluorescent organic dye and which can be tuned to radiate at any of a wide range of frequencies * * * a laser with organic dye dissolved in a solvent as the active medium whose beam is in the visible light …
80argon laser — a type of laser that produces a beam of intense light, used especially in eye surgery to treat disease of the retina (e.g. diabetic retinopathy) or glaucoma (as in argon laser trabeculoplasty). See also photocoagulation. * * * a laser with… …
