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8,236 terms
Photonics Dictionary
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electronoluminescence
->
cathodoluminescence
Light produced when a metal is bombarded with high-velocity electrons causing small amounts of the metal to vaporize and emit radiation. Also known as electronoluminescence.
electrophoresis
The movement of particles or ions in a solution toward the electrode having the opposite sign because of the application of an electrical field.
electrophoretic display
An electrophoretic display, often referred to as an electronic paper display or e-paper display, is a type of electronic visual display technology used in electronic devices for the purpose of...
electrophotograph
The image formed in electrophotography.
electrophotography
The photographic recording of an image formed by the alteration in electrical properties of the sensitive materials and induced by the action of light.
electroreflectance spectroscopy
A type of electromodulation that measures changes in spectral reflectance.
electrosensitive recording
A technique that uses the passage of an electrical current through a recording medium to produce a permanent image on that medium.
electrostatic analyzer
A device that permits only electrons within a narrow velocity range to pass through it, while rejecting those above and below.
electrostatic charge
The effect produced by electrical charges or fields alone, without interaction with magnetic influence.
electrostatic deflection
The deflection of an electron beam by the action of an electrostatic field that has a component perpendicular to the direction of the beam.
electrostatic focus
The use of an applied electrical field to focus a cathode-ray tube's electron beam.
electrostatic image dissector
A nonmagnetic instrument utilizing an electrofocus and deflection tube with a photocathode for imaging purposes. The optical image is converted into a photoelectric output at the photocathode and is...
electrostatic lens
The electrical distribution that serves to influence an electron beam in the same way that an optical lens affects a light beam.
electrostatic printer
An instrument used to print an optical image on a specially treated paper. Light and dark portions of the original image are illustrated by electrostatically charged and uncharged portions of the...
electrostatic process
A process used in document copying and printing that involves the visible rendering of an invisible electrostatic image on a photoconductive material by its treatment with oppositely charged pigment...
electrostatic storage
Information storage on a dielectric medium that represents the data as those spots on the medium having electrostatic charges, forming an observable record of the data.
electrostatic tape camera
A camera that records its images electrostatically on plastic tape; used in situations where radiation would have an adverse effect on regular photographic film.
electrostatically focused image tube
An image intensifier that uses electrostatics to amplify and focus the electronic image.
electrostatography
The recording of patterns by the production and use of latent electrostatic charge patterns. See electrostatic process.
electrostriction
Elastic deformation of a dielectric caused by volume force when the dielectric is placed in an inhomogeneous electric field.
electrostrictive
A common form of high-precision, ceramic-based actuator capable of moving and measuring at the nanometer level.
electrowetting display
An electrowetting display (EWD) is a type of electronic display technology that utilizes the principles of electrowetting to control the behavior of colored oil droplets on a hydrophobic surface....
elevation angle
->
angle of elevation
The angle between an instrument's line of sight and a reference horizontal plane.
ELF
extremely low frequency
ELINT
electronic intelligence
ELIP
electrostatic latent image photography
ELISA
enzyme-linked immunosorbent assay
ellipsometer
A spectrometer equipped with polarizing prisms and retardation plates that is used in the analysis of elliptically polarized light, mostly in the study of thin, evaporated films.
ellipsometry
Ellipsometry is an optical technique used to characterize the properties of thin films and surfaces. It is based on the measurement of changes in the polarization state of light reflected or...
elliptical polarization
->
polarization
Polarization refers to the orientation of oscillations in a transverse wave, such as light waves, radio waves, or other electromagnetic waves. In simpler terms, it describes the direction in which...
elliptically polarized light
A light beam whose electric vectors are broken into two elements of unlike amplitudes that are perpendicular to each other and that differ in phase by values other than 1, 3/4, 1/2, 1/4, etc.,...
ellipticity
The quality of asymmetrical intensity distribution in a laser beam, as opposed to a circular distribution.
EM
electron microscope; electromagnetic; electromodulation
EMA
extramural absorption
EMAT
electromagnetic acoustic transducers
embedded laser
The term "embedded laser" typically refers to a laser device that is integrated or embedded into a larger system or structure. In this context, "embedded" implies that the laser is an integral part...
embedded vision
Embedded vision refers to the integration of computer vision technologies into various embedded systems, devices, or machines. Computer vision involves teaching machines to interpret and understand...
embossed hologram
A hologram imprinted on plastic or another medium; e.g., those commonly found on credit cards.
EMC
electromagnetic compatibility
EMCCD
electron multiplying CCD
EMD
equilibrium mode distribution
EME
electromagnetic energy; electromagnetic environment
emergent ray
In optics, the light ray leaving a medium in contrast to the entering or incident ray.
emery
A natural abrasive, produced from corundum in grades ranging from rough to fine, used in the grinding and lapping of glass.
EMF
electromotive force
EMI
electromagnetic interference
emission line
The line or lines emitted by an element when its radiation particles travel from one energy level to another.
emission microscope
A type of electron microscope in which the specimen also serves as the cathode source.
emission of sky
Thermal emission caused by the unity in absorption bands that must be discriminated when calculating radiation intensity of any celestial object.
emission spectroscopy
Emission spectroscopy is a technique used to study the emission of electromagnetic radiation (light) by atoms, molecules, or ions when they undergo transitions from excited states to lower energy...
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Photonics Dictionary
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