PACS:42.79.Bh, 42.79.Ag, 42.30.Kq, 42.30.Va (all) DOI:10.1070/PU1969v011n05ABEH003743 URL: https://ufn.ru/en/articles/1969/5/h/ Citation: Korolev A N "Increase of resolution of optical systems by effective use of the degrees of freedom on the object wave field" Sov. Phys. Usp.11 712–726 (1969)