METHOD OF MEASURING NOISE FACTOR MICROCHANNEL PLATE Russian patent published in 2019 - IPC H01J43/04 

FIELD: agriculture; machine building.

SUBSTANCE: invention relates to a measuring technique and can be used to measure the signal-to-noise ratio with the subsequent calculation of the noise factor of a microchannel plate (MCP) in the production of an MCP, in particular for use in night-vision devices. Method includes the removal of the current signal from the fluorescent screen using a photomultiplier tube and the subsequent processing of the digitized signal. Current signal obtained from the photomultiplier is converted into voltage by means of a load, the instantaneous values of which are recorded by a measuring system by the voltage drop. Resulting analog signal is converted to digital, and the processing of the digitized signal in a given frequency band is carried out in the range from 0 to 25 kHz by a personal computer with the specified software. In the process of measuring the noise factor the average value of the signal is determined and when it changes to ±10 % of the average value of the current signal is automatically repeated measurements. On the load, a voltage drop is created that is directly proportional to the luminous flux of the fluorescent screen, for 40–50 s.

EFFECT: ability to control the noise parameters in the manufacture of MCP on any frequency band, reducing measurement error and reducing the duration of its process.

4 cl, 2 dwg