Optical systems with diffractive elements: ways of the chromatism correction
G.I. Greiysukh, E.G. Ezhov, S.V. Kazin, S.A. Stepanov

Penza State University of Architecture and Construction

Full text of article: Russian language.

Abstract:
We present the method which allows the receiving of the spatial frequency distribution function of the diffractive optical elements which provides achromatization of the focusing objective consisting of two diffractive elements. The given method differs from the known one that it allows the setting of minimal period of spatial frequency of the elements. Besides this method allows the researching the effect of minimal period on objective’s key parameters. By reason of technological limits of the minimal period these possibilities are especially important in the case of vacuum ultra-violet and X-ray radiation. Interdependences of the basic parameters of focusing diffractive achromatized doublet were investigated in the range of soft X-ray radiation. The basic performances of such doublet were compared with the same ones of the single diffractive lens.

Key words:
diffractive optical element, diffractive doublet, achromatization, axicon, soft X-rays.

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