8,236 terms
Photonics Dictionary
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dye laserA laser using a dye solution as its active medium. Its output is a short pulse of broad spectral content and its achievable gain is high. Dye lasers function at room temperature. Synchronous pumping...
dye transfer methodThe subtractive imbibing process of transferring color prints on paper whereby the dyes from three separately prepared images are transferred to one sheet of paper to form the color print.
dye-polymer optical discA type of erasable data storage device that uses a medium deposited on the disc in two layers, each dyed to absorb a different wavelength of laser light. To record data, the lower layer is heated by...
dynamic beam correctionThe superimposition of a pilot object on each hologram. The fixed relative position of the scanning and pilot beam during the recording process ensures that sensing and fixing the pilot beam position...
dynamic fatigueStress applied to an optical fiber at a constant rate.
dynamic light scattering spectroscopy -> photon correlation spectroscopySpectroscopy used to study the concentration, diffusion and Brownian motion of small particles suspended in a fluid by measuring dynamic fluctuations of light that is scattered or fluoresced by the...
dynamic magneto-optical correlatorAn optical correlator incorporating a binary phase-only spatial light modulator made from an iron garnet magneto-optic solid crystal and used in target recognition systems.
dynamic spectroscopyA spectroscopic technique used to display the intensity of an optical pulse as functions of time and frequency simultaneously.
dynamic stare sensorA type of mosaic detector array that combines features of scanning and staring sensors by using a small rapid scanning motion (see saccadic motion) over a few pixels at a time.
dynamic theoryThe theoretical explanation and analysis of the interactions between electron waves and crystals used in studying electron diffraction.
dynamic variationIn electrical equipment, power variations that are temporary (as opposed to the permanent, cumulative effects of drift).
DYNAMOdynamic magneto-optical correlator
dynodeThe auxiliary electrode in a photomultiplier that gives rise to secondary emission and amplification when bombarded by photoelectrons.
eelectron charge
e-beamelectron beam
E-bendIn a waveguide, a change in direction of the axis without deviating from the plane of polarization.
E-Oelectro-optic
EAFelectron-arc furnace
EALMelectronic address light modulator
EAMelectro-absorption modulator
EAPelectro-absorption avalanche photodiode
EBAMelectron-beam accessed memory
EBCelectron-beam coating
EBCMextended boundary condition method
EBERelectron-beam electroreflectance
Eberhard effectObserved phenomenon of a small developed image with higher density than a larger image because of variation in photographic plate densities with variations in size of opening.
EBESelectron-beam-exposure system
EBICelectron-beam-induced current
EBIRelectron bombardment-induced response
EBRelectron-beam recording
EBTelectron-beam tomography
ECelectrically conducting; European Commission
ECCerror correction code; electronically controlled coupling
eccentric mountingA lens mounting with eccentric rings that may be rotated to shift the axis of the lens to a prescribed position.
eccentricityIn the tolerancing of optical elements, the displacement of the optical axis from the mechanical axis.
ECDCelectrochemical diffused collector
echelette gratingA diffraction grating with lines and grooves formed so as to concentrate the radiation of a particular wavelength into one specified order. This device is efficient when used in the infrared region...
echelleA grating that serves to provide higher resolution and dispersion than the average grating, and still has a greater free spectral range than either the Fabry-Perot etalon or the reflection echelon.
echelle gratingA specialized form of diffraction grating consisting of assembled glass plates of equal thickness that resemble a flight of stairs. The light enters through the largest plate at the end and emerges...
ECLemitter-coupled logic; external cavity laser
ECMelectronic countermeasure
ECMAEuropean Computer Manufacturers' Association
ECOelectron-coupled oscillator
ECPRelectrically calibrated pyroelectric radiometer
ECRelectron cyclotron resonance
EDextralow dispersion
EDCerror detection code
EDDelectronic data display
EDFAerbium-doped fiber amplifier
edgeThe flat or angled surface, usually fine-ground, that limits the aperture of a lens or prism surface.
Photonics Dictionary