Teledyne DALSA - Line Scan Leader 5/24 LB

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AdTech Ceramics - Ceramic Packages 1-24 HP

28 terms

Photonics Dictionary: D

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dark frame

A frame taken to identify electronic noise in a CCD imaging device. A dark frame is recorded without exposing the CCD to any external light by, for example, leaving the shutter of a CCD camera...

dark-field disc

A disc contained within an electronic cell counter for regulating light transmission.

display electronics

DEA

display electronics assemblies

deflection circuit

The circuit that regulates an electron beam's deflection in a cathode-ray tube.

deflection focusing

The progressive defocusing of a cathode-ray tube display image that occurs when the deflected electron beam impinges on the cathode-ray tube screen at a slant.

deflection yoke

A metal coil or coils wrapped around the outside of the neck of a cathode-ray tube. Current passing through the coils produces a magnetic field, which can be used as an alternative to deflection...

DESC

Defense Electronics Supply Center

DEU

display electronics unit

die bonding

Die bonding is a critical process in semiconductor manufacturing and microelectronics assembly, where a semiconductor die or chip is attached and electrically connected to a substrate or a package....

digital camera

A digital camera is a device that captures and records still images or video in digital format. Unlike traditional film cameras, which use photographic film to capture and store images, digital...

digital delay generator

An instrument that can preselect intervals, often in increments of 1, 10 or 100 ns, for the generation of electronic pulses by means of front-panel switches. Also called a time-delay generator.

digital filter

A linear computation or algorithm performed on a selected series in the form of an input signal that produces a new series as output. The computational device may be a specifically designed...

digital photography

A form of photography in which an electronic camera converts an image to an electronic signal that is stored in digital format on magnetic media or film.

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.

Photonics DictionaryD

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