УДК: 681.785.552

Setup for recording a variable-line-spacing diffraction grating for the far-UV region

Muslimov, E.R., Belokopytov, A.A., Sattarov, F.A., Korennoy, K.S.

Publication in Journal of Optical Technology

For Russian citation (Opticheskii Zhurnal):

Муслимов Э.Р., Белокопытов А.А., Саттаров Ф.А., Коренной К.С. Схема записи дифракционной решетки с переменным шагом штрихов для дальнего ультрафиолетового диапазона спектра // Оптический журнал. 2017. Т. 84. № 3. С. 41–46.

Muslimov E.R., Belokopytov A.A., Sattarov F.A., Korennoy K.S. Setup for recording a variable-line-spacing diffraction grating for the far-UV region [in Russian] // Opticheskii Zhurnal. 2017. V. 84. № 3. P. 41–46.

For citation (Journal of Optical Technology):

É. R. Muslimov, A. A. Belokopytov, F. A. Sattarov, and K. S. Korennoĭ, "Setup for recording a variable-line-spacing diffraction grating for the far-UV region," Journal of Optical Technology. 84(3), 190-194 (2017). https://doi.org/10.1364/JOT.84.000190

Abstract:

This paper discusses the optical setup of a grazing-incidence spectrograph for the 10–30-nm far-UV region. The aberrations in this setup are corrected by using a variable-line-spacing diffraction grating. The variation of the spacing over the grating area is significant in such a setup and cannot be maintained if the grating is mechanically cut on a ruling engine. It is proposed to use a holographic analog grating with the calculated parameters. To record such a grating, it is necessary to include an auxiliary objective in the setup, mounted obliquely in one of the arms of the recording setup. The parameters of the latter are determined analytically for the meridional cross section and then fine-tuned by numerical optimization. The results of modeling a spectrograph setup with a holographic grating show that its spectral resolution corresponds to that of a setup with an ideal grating and reaches 0.01 nm.

Keywords:

diffraction grating, holographic recording, meridional coma, far-UV region

Acknowledgements:

The authors are grateful to E. N. Ragozin (P. N. Lebedev Physics Institute, Moscow) for help in formulating the research problem and for valuable consultation in the area of FUV spectroscopy.

OCIS codes: 090.2890,230.1950,040.7480

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