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8,236 terms
Photonics Dictionary
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ceramics
In optics and photonics, ceramics refer to advanced ceramic materials that possess unique optical properties, making them suitable for various applications involving the manipulation and control of...
Cerenkov counter
An instrument that detects high-energy charged particles by analysis of the Cerenkov radiation that they emit.
Cerenkov radiation
The radiation produced when a charged particle traverses a medium that has a refractive index considerably greater than unity. The moving particle has a velocity that exceeds the velocity of light in...
cerium oxide
A polishing material that has a quicker polishing action than rouge (ferric oxide) and that is cleaner to handle.
CERN
European Organization for Nuclear Research
cesium 134
An isotope of cesium that emits negative beta particles and has a half-life of 2.19 years; its applications include photoelectric cells and developmental ion propulsion systems.
cesium chloride
Colorless crystals used in photoelectric cells and for photosensitive material in cathodes.
cesium oxide cell
A photoemissive detector sensitive to wavelengths up to 1 µm. It has one sharp maximum of sensitivity at 350 nm and a broad maximum at 800 nm.
cesium phototube
A phototube having a cesium-coated cathode that has its greatest sensitivity in the infrared region.
cesium vapor lamp
A lamp that emits light as the result of the passage of an electrical current through ionized cesium vapor.
cesium-antimonide photocathode
A photocathode that exhibits maximum sensitivity in the blue and ultraviolet regions of the spectrum. The sensitivity is obtained by the exposure of a thin layer of antimony to cesium vapor at an...
CEV
controlled environment vault
CFA
complex field amplitude
CFF
critical fusion frequency
CFM
cubic foot per minute
CFR
code of federal regulation
cg
centigram; center of gravity
CGA
color graphics adapter; Compressed Gas Association
CGC
color graphics converter
CGH
computer-generated hologram
CGHOE
computer-generated holographic optical element
CGHS
computer-generated holographic scanner
CGI
Computer Graphics Interface
CGM
computer graphics metafile
cgs
centimeter-gram-second
CGVH
computer-generated volume hologram
chain scission
The breakdown of the bonds in polymer chains caused by illumination.
chalcogenide
Chalcogenide refers to a class of compounds containing elements from group 16 of the periodic table, which includes sulfur (S), selenium (Se), and tellurium (Te). These elements are known as...
chalnicon
Proprietary name for a low-light-level TV pickup tube.
chamfer
The removal of sharp edges by grinding.
channel density
The number of channels per unit bandwidth handled by a single optical fiber.
channel electron multiplier
A photoelectric detector consisting of a glass tube internally coated with a low conductance material. Voltage applied along the tube causes photoemission from the photocathode at the end of the tube...
channel impedance
The parallel resistance and capacitance appearing between the active guard ring junctions in a silicon photodiode.
channel substrate planar growth
The creation of a diode laser structure by liquid-phase epitaxy over a grooved substrate.
character generation cathode-ray tube
A cathode-ray tube that generates symbols for use in other displays. The tube operates by scanning specific characters on the target and generating them as video signals to other cathode-ray systems.
character generator
Computer hardware or firmware that accesses character patterns stored in read-only memory and displays them at specific coordinates on a screen.
character read-out system
A photoelectrically controlled, alphanumeric reading device that converts characters to audible or sorting signals which can be fed to a computer, electric typewriter, tapepunch or other machine.
characteristic angle
The angle at which a given mode propagates down an optical fiber.
characteristic curve
A graph used in photography to portray the increase of a film's density as its time of exposure increases.
charge packet
->
packet
The finite amount of electrical charge generated in response to incident radiation and transferred from one storage element to the next in a charge-coupled device. Each packet corresponds to a pixel...
charge trapping
In a charge-coupled device, the disappearance of some of the accumulated charge into the silicon during readout.
charge-coupled device
A charge-coupled device (CCD) is a type of electronic image sensor used in various imaging devices, including digital cameras, camcorders, and scientific instruments. It consists of an integrated...
charge-injection device
A charge-injection device (CID) refers to a class of devices that manipulate and detect electrical charge within a semiconductor material. Charge-coupled devices are a specific implementation of this...
charge-transfer device
See charge-coupled device; charge-injection device.
charge-transfer efficiency
In a charge-coupled device, the percentage of each charge packet that is carried over to the next stage of the transport shift register.
charge-transfer gate
->
transfer gate
A single long gate electrode that transfers the line of charge packets to the transport shift register in a charge-coupled device.
chelate laser
A laser having a rare-earth chelate within a plastic host as the lasing material. The chelate laser is easily pumped and has a high quantum efficiency and narrow emission lines.
chelating agent
Any of several compounds capable of binding heavy-metal ions, thereby preventing interaction between the bound ions and the rest of the medium.
chemical actinometer
A light-sensitive detector having a chemical compound that reacts when exposed to light. It is used in photochemistry and relies on the chemical reaction to determine the amount of incident radiation.
chemical laser
A laser that relies on chemical activity instead of electrical energy to produce the pumping action necessary to form pulses of light.
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Photonics Dictionary
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