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OEM Dictionary Terms

photoemissive cell
 ultraviolet photoemission spectroscopy
A technique for measuring the energy spectrum of electrons emitted during the absorption of ultraviolet radiation. This...
photoemissive detector
An electronic tube instrument in which the anode current varies with the intensity of light incident on the cathode.
photoemissive tube photometer
A photometer that uses a photoemissive tube to detect and measure light. See photoelectric photometry.
Schottky-barrier IRCCD
A form of infrared CCD that utilizes internal photoemission as a photodetection mechanism.
iconoscope
A camera tube that employs a high-velocity electron beam to scan a photoemissive mosaic and to store electrical charge...
intrinsic photoemission
The photoemission that would occur if a crystal were pure and its structure perfect.
negative-electron-affinity photocathode
A photocathode having a P-type semiconductor with a work function less than its bandgap. The photocathode can release a...
photoemissive effect
 mosaic
One surface of a nonconducting plate that is coated with many minute particles of photoemissive material that are insulated...
channel electron multiplier
A photoelectric detector consisting of a glass tube internally coated with a low conductance material. Voltage applied along...
photoemission
photoelectric multiplier
A phototube in which the primary photoemission current, before being extracted at the anode, is multiplied many times.
gas photocell
A photoemissive cell having an inert gas added to its envelope. Subsequent ionization of the gas increases the responsivity...
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...
photoemulsion
In photolithography, an opaque material used in masks that has a lower optical density and grainier composition than chrome.

(16 results found)

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