An instrument designed to measure radiation indirectly through the use of several phosphors and a photomultiplier tube. The absorption of radiation by any phosphors results in light flashes that may be recorded.

An image intensifier tube in which the photocathode and the output of the microchannel plate are proximity-focused on the...

Very small phosphor particles present on the screen of a picture tube.

Modulation transfer function of an optical element when used for transporting images from a lambertian source such as...

A tube containing mercury vapor and lined with a phosphor. When current is passed through the vapor the strong ultraviolet...

The property of a phosphor that determines its ability to emit light for a time after the stimulus has been extinguished....

A fluorescent screen refers to a phosphorescent or fluorescent-coated surface that emits visible light when exposed to other...

The light flash that occurs when an electrical field is applied to a phosphor already excited by ultraviolet radiation.

A phosphor that has the ability to convert into light emission a portion of energy lost by ionization when a charged...

1. A device used to trace out an object and build up an image. One of the most common of these types is video scanning. The...

An electron tube that employs electromagnetic radiation to produce a visual replica of an image produced on its cathode....

The recording of the information contained in a modulated electron beam onto photographic or silicon resin-coated materials....

A planar photocathode and a planar phosphor screen mounted in a close-spaced parallel configuration in an evacuated...

Light that is emitted from a phosphor film applied to the surface of a three-layer thin film, respectively metal, oxide and...

A type of glass that includes phosphorus pentoxide and that, unlike silica-based glass, is resistant to hydrofluoric acid.

Gallium nitride (GaN) is a compound made up of gallium (Ga) and nitrogen (N). It is a wide-bandgap semiconductor material...

Luminescence is the emission of light from a source that is delayed by more than 10-8 s following excitation.

Germanium crystal refers to a crystalline form of the element germanium (Ge), which is a metalloid and semiconductor...

Gallium nitride-based light-emitting diodes (GaN-based LEDs) are semiconductor devices that emit light when an electric...

An image intensifier, also known as an image intensification tube or image intensification device, is a specialized...

The effect, present in particular phosphors, that is defined as a transformation in the dielectric constant of a material...

A system in which a supplied signal causes the deflection of the electron beam in a cathode-ray tube, thus forming a visible...

Spectroscopy is a technique used in the study of interactions between matter and electromagnetic radiation. It involves...

In semiconductor physics and materials science, the term "III-V materials" refers to compounds composed of elements from...

1. The variation in intensity of a light beam as it travels through the atmosphere. 2. In radiation physics, a light flash...

Luminescence is the emission of light that occurs without the involved substance undergoing a significant increase in...

A type of color-generating cathode-ray tube that uses a shadow mask, a thin perforated electrode, located close to the...

The region of the cathode-ray tube phosphor screen restricted by the tube and instrument specification.

A method for remote measurement of the temperature of moving surfaces in harsh environments by using a laser to stimulate...

A source made to glow by electrons that are produced either electrically or by isotopes of various elements.

A closely spaced series of well-known chemicals having a refractive index lying between 1.33 for water and 1.95 for a...

An X-Y electrically addressable series of arrays with individual electron emitters bombarding a phosphor-coated transparent...

Gallium arsenide phosphide (GaAsP) is a semiconductor alloy composed of gallium (Ga), arsenic (As), and phosphorus (P). It...

A process used in pyrometry and photothermometry to create a photographic record of a surface's temperature gradients....

Medical diagnostic (x-ray) imaging using laser printers to produce high-resolution digital hard copy instead of film exposed...

Also known as a shadow mask, a perforated plate placed between the focusing and accelerating electrodes, and the tricolor...

In the context of optical materials, the term "impurity level" refers to the presence of foreign atoms or molecules within...

Chip-on-board (COB) lights refer to a type of LED lighting technology where multiple LED chips are directly mounted onto a...

Rare-earth elements (REEs) are a group of seventeen chemical elements found in the Earth's crust, characterized by their...

An image-forming instrument in which a strong electrostatic field causes cold emission of electrons from a sharply rounded...

Envelopes for cathode-ray tubes are made by blowing glass in the same manner as light bulbs. They have a fairly flat end...

A form of image intensifier designed to amplify a weak fluoroscopic image. The image is received at an input phosphor...

A measurement method for reflectance by gas ionization in which light passes through a vapor before and after reflection....

In the context of materials science and semiconductor physics, doping refers to the intentional introduction of impurities...

A phosphor, such as sulfide or selenide, that can be excited to luminescence by incident infrared radiation simultaneous to...

An electron-gun system is an assembly used to generate and control a focused beam of electrons. Electron guns find...

A polycrystalline material that transmits in the infrared; it is used as a phosphor in x-ray and television screens.

A type of electroluminescent display that will record and maintain an irradiated image on its phosphor screen, provided a DC...

The spectroscopic study of the radiation emitted by the lifetime of phosphorescence.

A mixture of phosphor with a trace of a radioactive element that emits faint light continually. It is used on watch dials...

An image intensifier that consists of an evacuated tube with a large input phosphor screen at one end. The phosphor screen...

A fiber optic end plate constructed by drawing a bundle of parallel fibers embedded in glass and cutting it into thin...

A chemical substance that exhibits fluorescence when excited by ultraviolet radiation, x-rays or an electron beam. The...

Observed electroluminescence of zinc sulfide phosphors when excited by an electric field. This effect is the basis for the...

A nonradiative transition refers to a process in which an electron or an atom undergoes a change in its energy state without...

A CRT screen on which two phosphors differing in color and persistence are deposited.

The triangle in a chromaticity diagram joining the chromaticities of the NTSC phosphors, and containing all chromaticities...

An image converter that produces a visible image based on the infrared emittance of the object. The infrared energy is...

A microchannel plate (MCP) is a specialized electron multiplier device used in various applications such as particle...

A noncrystalline, inorganic mixture of various metallic oxides fused by heating with glassifiers such as silica, or boric or...

A vacuum tube in which a magnetic field is superimposed onto the tube's electrical field. When the two fields are aligned,...

A modified form of an image-retaining panel that can be used in subdued daylight. This is achieved by adding a layer of zinc...

Indium phosphide (InP) is a compound semiconductor material composed of indium (In) and phosphorus (P). It belongs to the...