Application of Multilayer Dielectric Coatings for Suppression of Non-Working Spectrum Orders in Diffraction Grating Spectrometers
| Autor: | Z. V. Semenov, G. V. Erg, I. A. Zarubin, V. A. Labusov |
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| Rok vydání: | 2017 |
| Předmět: | |
| Zdroj: | Industrial laboratory. Diagnostics of materials. 83:117-122 |
| ISSN: | 2588-0187 1028-6861 |
| DOI: | 10.26896/1028-6861-2018-83-1-ii-117-122 |
| Popis: | The calculation of the combined optical filter configuration for suppression (reflection) of the non-working spectrum orders in diffraction grating spectrometers is presented. Combined filter consists of a substrate with deposited dichroic filters based on multilayer optical coatings. The calculation takes into account the acceptable width of spectral transitions in the filters transmission spectra and dichroic filters positioning accuracy on the substrate. A filter was designed and manufactured for suppression of the non-working diffraction spectrum orders of small-sized spectrometer “Kolibri-2” with operating spectral range of 190 - 1100 nm. The filter’s degree of intensity suppression of non-working orders is at least 2 X 10 4 times. Artifacts observed in the spectrum are attributed to the light refraction at the edges of the multilayer coatings. A method providing reduction of the aforementioned negative effect is developed. |
| Databáze: | OpenAIRE |
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