|Autors: Nenchev, M.N., Deneva, M. A., Marinova, M. P.|
Title: "Competitive light beam splitters based on complex interference wedged structures that use low-reflectivity components (Fresnel’s reflection)"
Keywords: beam splitter, interference wedged structure, low-reflectivity component, Fresnel’s reflection,
Abstract: We demonstrate that suitably composed Interference Wedge Structures by wedged pure glass elements using only Fresnel’s reflection, can be effectively used for realization of competitive light beam splitters and filters. Theoretical analysis, simulation and experimental testing show that by appropriately chosen parameters and for suitably composed interference complex, the structures can reach controlled variable transmission in wide range (99% to ~ 30%) and reflection from ~2% to ~70%. The proposed splitters are very compact, sheet-like elements. The splitting is by sliding in their plane. The splitting variation assures conserving of the propagation directions of the formed beams. The incident beam on the splitter can be high power, the influence of the air humidity is strongly reduced, and the cleaning of the filter surfaces is problem less. A single splitter can work in a wide interval of wavelengths (IR, visible) and without polarization dependences for incident angles up to ~20o.
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