International Scientific Journals
of Scientific Technical Union of Mechanical Engineering "Industry 4.0"

The article presents the results of increasing the accuracy of the operating parameters of the electron flow (power density, speed of electron-beam processing) in obtaining optical plates of small thickness as components of optical instrumentation devices. It is shown that flexible control of such parameters of tape electron flow allows to significantly (1.5-2 times) increase the accuracy and quality of surface processing of small thickness (up to millimeters) optical silicate plates (glass K8) by low-energy electron flow. The implementation of such management was carried out using an information-measuring system, the general principles and functional scheme of which are given in this article. The proposed system allows with high accuracy (relative error does not exceed 4.5%) and efficiency (the time between the moment of
determining the parameters of the electron flow to the moment of its formation with the adjusted values of these parameters does not exceed 12-17 μs).

The optimum ranges of the electron beam parameters change (density of heat exposure and speed of movement), within which there is a substantial improvement (more than 2 … 3 times) of the basic properties of the surface layers of the optical elements are found. The tests of the optical windows of laser rangefinders under intensive external heating and hemispherical optical fairings of IR devices at supersonic blowing by air flow and axisymmetric rotation that simulate real operating conditions, have shown that in the case of processed by electron beam optical windows and fairings it reduces the number of their destruction and increases the reliability of the devices during the operation, taking into account the impact of external-heat.