Abstract:
A process for manufacturing an optical element comprising a first step of spinning a circular sheet of a first metallic material for it to adhere to a rotating matrix and form a shell; a second step of assembling the shell on a temporary support; and at least a third step of diamond turning the shell by means of a diamond tool to obtain an optical surface.
Abstract:
A method for monitoring precipitation of magnetospheric particles includes detecting charged magnetospheric particles by a particles detector, processing the detection data to associate a respective estimate or measurement of kinetic energy with the detected magnetospheric particles, obtaining a first count value NH associated with a relatively higher estimate or measurement of kinetic energy, obtaining a second count value NL associated with a relatively lower estimate or measurement of kinetic energy, detecting a relative variation of the second count value NL with respect to the first count value NH, determining that an impulsive event of precipitation of charged magnetospheric particles (MPP event) in the magnetosphere occurred, assigning to the MPP event geomagnetic longitude and time, defining one or more groups of MPP events occurred in a time range at a same geomagnetic longitude, and identifying a group of MPP events indicative of an activity of terrestrial origin.
Abstract:
A method for applying a carbon-based reflective overcoating on a grazing incidence optical unit comprising a substrate and a coating of a high-density material chosen from the group comprising gold, platinum, iridium, palladium, rhodium, ruthenium, chrome and nickel or a low-density material such as carbon or B4C; the method comprises the step of treating the optical unit with a solution or gaseous phase containing at least one polymer precursor material to create the overcoating through absorption of the polymer material on the coating.
Abstract:
A process for manufacturing an optical element by hot-forming a glass sheet (2), comprising the steps of: positioning a mold (4) in a cavity (9) of a base element (7) of a muffle (6); positioning the sheet (2) on the mold (4) with a peripheral edge superimposed on a closure area (14, 15) of the base element (7) surrounding the cavity (9); closing a cover (8) of the muffle (6) onto the base element (7), so as to maintain the peripheral edge of the glass sheet (2) in contact with the closure area (14, 15) of the base element (7); and performing a controlled heating and cooling thermal cycle, by applying a pressure difference between the base element (7) and the cover (8) so as to press the glass sheet (2) onto the mold (4) after reaching the maximum temperature.