Examples of 'photocathode' in a sentence
Meaning of "photocathode"
photocathode: a cathode in a vacuum tube that emits electrons when illuminated with light
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- A cathode that emits electrons when exposed to light.
How to use "photocathode" in a sentence
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photocathode
The photocathode may be formed by an alkaline antimonide.
Theoptical filter is adapted to the photocathode characteristics.
The photocathode is deposited on this transparent layer.
The photodetector may be a photocathode or a photodiode.
Each photocathode section corresponds to a dedicated multiplier.
Manufacturing process of a photocathode for an image intensifier tube.
The photocathode thus excited generates a flow of electrons.
The light photons are then converted to electrons by a photocathode.
This tube consisted of a photocathode in proximity to a fluorescent screen.
The image detector has been described with a gallium arsenide photocathode.
The photocathode is deposited onto this transparent layer.
The support must give the photocathode a good mechanical rigidity.
The photocathode thus excited generates an electron flux.
The substrate which bears the photocathode is usually made of glass.
The photocathode is then protected against the impact of positive ions.
See also
It may advantageously comprise a circuit to determine the current in the photocathode.
Such a tube includes a photocathode converting photons into electrons.
These current measurements give an estimation of the transparency of the photocathode.
In this method a photocathode is placed into the optical path.
This chemical reaction occurs during the photocathode depositing phase.
This type of photocathode has the disadvantage of high dark emission.
Claims are directed to a process which does not show earlier difficulties in photocathode patterning.
A photocathode usually consists of alkali metals with very low work functions.
The electrode which faces the photocathode may also be a meshed grid.
A photocathode projection system and its use in formation of submicron images is described.
The visible photons excite a photocathode which generates a flux of electrons in response.
The resulting photons are converted into electrons on the photocathode photoelectric effect.
This makes the photocathode very efficient at creating photoelectrons from photons.
The wavelength range may be limited by the photocathode itself or by the optical filter.
The preferable threshold is one half or less of the maximum responsiveness of the photocathode.
The evaporation of the photocathode will be controlled according to the known method.
These detectors work by amplifying the electrons generated by a photocathode exposed to a photon flux.
The thickness of the photocathode is such that the photoelectric yield is maximum.
An alternative alignment mechanism depends on electron emission from alignment paths on the photocathode.
This relationship between photocathode sensitivity and wavelength is called the spectral response characteristic.
Therefore the pixels on the phosphor screen are aligned with the pixels of the photocathode.
Incident photons strike the photocathode and electrons are produced as a consequence of the photoelectric effect.
This barrier is intended to reduce the hole current which flows through the photocathode.
The semitransparent photocathode is placed inside the vacuum envelope constituting the image detector.
The protection layer then makes it possible to avoid the positive ions impacting the photocathode.
The GaAs photocathode enabled detection of objects at greater distances under much darker conditions.
This chemical barrier prevents the sodium present in the scintillator from migrating towards the photocathode.
This invention relates to a photocathode for pickup tubes and for image intensifier tubes.
Photocathode sensitivity measured with a different color spectrum light source will yield different readings.
For this reason they were based on a photocathode deposited onto a thin glass sheet for support.
The MCP amplifies the electrons and is directly behind the photocathode.
Standard night vision goggles use a photocathode to convert invisible infrared light photons into electrons.
Just behind this window there is a proximity photocathode marked PPC.
The photocathode PC converts light photons into electrons.
A lens was used to focus the fluorescent signal onto the PMT photocathode.
