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The paper considers the manufacturing process of a diffractive optical element by precision diamond micro-turning using a diffractive lens as an example. The process consists of a preparatory stage and the stage of manufacturing a given diffractive element on specialized equipment with computer program control. The preparatory stage includes selection of a special diamond cutter with a response offset of the cutter angle relative to the calculated microstructure of the diffractive element, the preparation and manufacture of the necessary equipment, including fasteners, with the help of which the optical part is installed and adjusted, on the surface of which a diffractive lens is formed. After that, the specified values of the parameters of the lens zones, the values of the parameters of the diamond cutter are entered into the computer software, and the process of manufacturing a diffractive lens is started.

The experimental determination of the reflection coefficients in the visible region of the spectrum of chromium oxide films unexposed and exposed to laser radiation was performed. The reflection coefficients were measured using a Linza - 150 spectrophotometer (operating spectrum range from 380 to 1700 nm). The obtained characteristic values of the reflection coefficients of samples of chromium oxide films at different wavelengths are presented in the table and in the form of graphs. It was found that the reflectance of the chromium oxide film before exposure to laser radiation monotonically decreases with increasing wavelength from 380 to 450 nm, with a further increase in wavelength to 630 nm, the reflectance increases monotonically. This work is part of the development of a technique for recording masks by focused laser radiation on multilayer absorbing coatings.

The design of six-layer antireflection coating that meets modern operational requirements for the 8-12 μm range based on the analysis of antireflection coatings available in OST 3-1901-95 is presented.