photocathode उदाहरण वाक्य

The more recent development of solid state optical devices such as photodiodes has reduced the use of photocathodes to cases where they still remain superior to semiconductor devices.
The pump laser will inject to the sample to induce the transitions, after finite time, another UV laser will hit the photocathode to produce electron pulses.
It is suggested that caesium suboxides play a role in the Ag-O-Cs ( S1 ) and multialkali Na-K-Sb-Cs photocathodes.
Using an S-20 photocathode, their image intensifiers produce a light amplification of around 1, 000? but are quite bulky and require moonlight to function properly.
Factors that affect the MTF include transition through any fiber plate or glass, at the screen and the photocathode and also through the tube and the microchannel plate itself.

Optical feedback has also been experimented with as an electron source, since a photocathode-phosphor cell will'latch'when triggered, providing a steady stream of electrons.
In the late 1990s, innovations in photocathode technology significantly increased the signal-to-noise ratio, with newly developed tubes starting to surpass the performance of Gen 3 tubes.
The resultant output signal at the anode is in the form of a measurable pulse for each group of photons that arrived at the photocathode, and is passed to the processing electronics.
In 1930 the introduction of the Ag-O-Cs photomultiplier provided the first practical solution to the detection of IR, combining it with a layer of galena as the photocathode.
The photoelectrons are accelerated towards the MCP by an electrical control voltage, applied between photocathode and MCP . The electrons are multiplied inside of the MCP and thereafter accelerated towards the phosphor screen.