coherent sources

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coherent sources 

If light beams from two independent sources reach the same point in space, there is no fixed relationship between the phases of the two light beams and they will not combine to form interference effects. Such light waves are called incoherent. If, on the other hand, the two light beams are superimposed after reaching the same point by different paths but are both radiated from one point of a source, interference effects will be seen because the phase difference in the two beams is constant. The two virtual sources from which these two beams are apparently coming are called coherent sources and any rays in which there is a constant phase difference are called coherent rays. Prior to the advent of the laser, the only way in which one could obtain coherent rays was by dividing the light coming from a point source into two parts. See Young's experiment; holography; clinical maxwellian view system; optical coherence tomography.
References in periodicals archive ?
In order to reduce antenna array aperture loss and to resolve more coherent sources, in this paper we adopt forward-backward spatial smoothing technique, and its covariance data block is shown in Fig.
The design of amplifiers integral to a feed-forward system is based on the phase coherent source concept.
The classical limit calculations for interatomic distance between two coherent sources depend on detached-electron energy as well as photon energy.
After determining that Wolf's theoryapplies to acoustics as well as to optics, Bocko, Douglass and Knox set up an acoustical experiment with a partially coherent source because it was easier than an optical one.
Addressing the twelve key topics of REDD+, the Journals are a coherent source of basic information, detailed case studies and practical exercises designed to build capacity for REDD+ practitioners worldwide.
The AN/SSQ-125 Coherent Source sonobuoy is an A-size, expendable, acoustic source sonobuoy.
The designand manufacturing process leading to the deliverable devices shall provide development steps towards the achievement of a low complexity high reliability coherent source for the laser cooling of Strontium in a future space implementation.
Pioneer's S-IW891, S-IW691 and S-IW691L integrate the exclusive Coherent Source Transducer (CST) driver technology that improves off-axis performance and provide a smoother, more accurate frequency response to fundamentally expand a room's "sweet spot.
Pioneer's proprietary Coherent Source Transducer (CST) technology is the truly dramatic advancement that functions to improve off-axis performance and deliver a smoother, more accurate frequency response.
Jones and team incorporated a specialized angled baffle configuration that works with Pioneer's exclusive Coherent Source Transducer (CST) technology to further envelop discerning entertainment enthusiasts into their favorite film and music content.
Plasmon lasers are promising nanoscale coherent sources of optical fields because they support ultra-small sizes and show ultra-fast dynamics.