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A method of designing a plastic zoom lens with a diffractive-refractive hybrid corrector, comprising one diffractive lens and one refractive lens, is described. The efficiency of this method is demonstrated by designing a compact zoom lens for a mobile phone. This zoom design, incorporating lenses made only of two commercial optical plastics (polymethylmethacrylate and polycarbonate), provides high optical performance.

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The possibility for sorption of iodine from mother liquors with activated carbons of varied brands was determined. The sorbents were tested in laboratory in industrial conditions. The optimum brand of the sorbent was chosen. The optimal conditions for the iodine sorption and desorption were recommended. For activated carbon chosen, resource tests were performed.

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