DataRay Inc. - ISO 11146-Compliant Laser Beam Profilers

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Optimax Systems, Inc. - Optical Components & Systems 2024 MR

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Photonics Dictionary

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dimmer

An electric or electronic device that regulates the voltage going to a light source as a means of varying the intensity of the light emitted by the source.

diode

A two-electrode device with an anode and a cathode that passes current in only one direction. It may be designed as an electron tube or as a semiconductor device.

diode laser -> diode laser

A diode laser is a type of laser that uses a semiconductor diode as the active medium to generate coherent light. Semiconductor diodes are electronic devices that conduct electricity primarily in one...

diode laser

direct-view storage tube

A cathode-ray tube in which secondary emission electrons form a display of high intensity.

directed energy

Directed energy refers to a type of energy that is emitted and transferred in a controlled direction. The term is often associated with military and technological applications where energy, typically...

dissector

In optical character recognition, the mechanical or electronic transducer used to detect the level of illumination present in the various portions of an illuminated sample region.

DOES

double-heterostructure optoelectronic switch

donor

An impurity in a material that is capable of inducing electrical conduction in that material by transferring an electron to the conduction band.

doping

In the context of materials science and semiconductor physics, doping refers to the intentional introduction of impurities into a semiconductor material in order to alter its electrical properties....

double-beam CRT

A cathode-ray tube that either splits an electron beam from one source or uses beams from two sources to produce two beams, each of which can produce separate traces, but which can overlap.

dual inline package

A package for electronic components that is suited for automated assembly into printed circuit boards. The DIP is characterized by two rows of external connecting terminals or pins, which are...

dynamic theory

The theoretical explanation and analysis of the interactions between electron waves and crystals used in studying electron diffraction.

dynode

The auxiliary electrode in a photomultiplier that gives rise to secondary emission and amplification when bombarded by photoelectrons.

electron charge

e-beam

electron beam

EAF

electron-arc furnace

EALM

electronic address light modulator

EBAM

electron-beam accessed memory

EBC

electron-beam coating

EBER

electron-beam electroreflectance

EBES

electron-beam-exposure system

EBIC

electron-beam-induced current

EBIR

electron bombardment-induced response

EBR

electron-beam recording

EBT

electron-beam tomography

ECC

error correction code; electronically controlled coupling

ECM

electronic countermeasure

ECO

electron-coupled oscillator

ECR

electron cyclotron resonance

EDD

electronic data display

edge sensing, second derivative

Technique for the precision evaluation of coincidence of a laser beam's center with the edge of the object under study and exact location of that edge by means of a double electronic differentiation...

edge-emitting LED

An edge-emitting light-emitting diode is a type of LED structure where light emission occurs primarily along the edge of the semiconductor chip rather than from the surface. Edge-emitting LEDs are...

EDM

electron discharge machining

EDP

electronic data processing

EELS

electron-energy-loss spectroscopy

EFP

electronic field production

EHP

electron-hole pair

EIA

Electronic Industries Alliance

EIL

electron injection laser

electric quadrupole lens

A device that uses four electrodes set in an alternating positive-negative polarity series to focus the beams of charged particles employed in electron microscopes and particle accelerators.

electro-optic Fabry-Perot spectroscopy

The spectroscopic analysis of interference patterns using an electronic imaging tube with a Fabry-Perot interferometer to record the fringes.

electro-optic modulator

An electro-optic modulator (EOM) is a device used to modulate the amplitude, phase, or polarization of light waves using an external electrical signal. Electro-optic modulation is a fundamental...

electro-optics

1. The branch of physics that deals with the use of electrical energy to create or manipulate light waves, generally by changing the refractive index of a light-propagating material; 2....

electroluminescence

The nonthermal conversion of electrical energy into light in a liquid or solid substance. The photon emission resulting from electron-hole recombination in a PN junction is one example. This is the...

electromagnetic focusing -> electromagnetic lens

An electron lens consisting of a homogeneous axial electric field and a magnetic field used in high-quality image tubes for high modulation transfer function and small geometrical distortion...

electromagnetic lens

An electron lens consisting of a homogeneous axial electric field and a magnetic field used in high-quality image tubes for high modulation transfer function and small geometrical distortion...

electromagnon

An electromagnon is a quasiparticle excitation that combines aspects of both magnetism and electric polarization in a crystal lattice. Specifically, it refers to a collective excitation of spins and...

electrostatic analyzer

A device that permits only electrons within a narrow velocity range to pass through it, while rejecting those above and below.

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.

Photonics Dictionary

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