Optical Arrangement for Spectral Decomposition of Light
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United States of America Patent
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Jul 7, 2017
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Jul 7, 2016
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Abstract
An optical arrangement for spectral decomposition of light is disclosed. In an embodiment the optical arrangement includes a reflection diffraction grating, a first medium with a refractive index nin arranged on a light incidence side of the reflection diffraction grating; and a second medium with a refractive index nG arranged on a side of the reflection diffraction grating that faces away from the light incidence side, with nin>nG, wherein the optical arrangement is configured in such a way that light impinges on the reflection diffraction grating from the first medium at an angle of incidence α, wherein a condition sin(α)>nG/nin is satisfied, wherein the reflection diffraction grating comprises a layer system with at least one unstructured layer and at least one structured layer, wherein the at least one structured layer has a periodic structure with a period p in lateral direction, and wherein the period p meets the following conditions: p<λ/[nin*sin(α)+nG] and p>λ/[nin*sin(α)+nin].
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