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28 February 2012 Scattered light in reflective and refractive optical systems
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A scalar theory, verified by the Rigorous Coupled Wave Analysis (RCWA), is used to compare the performance of optical surfaces with a specified roughness. It is shown that for surfaces with identical micro roughness structures, backward scattered light level for a reflecting surface is much higher than the forward scattered light produced by the surface of a refractive optical element made from typical optical glass. This implies that application of refractive components (such as transmission gratings and lenses) in optical systems where scattered light background is a limiting factor of the instrument performance may be advantageous over reflective components such as reflection gratings and mirrors.
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Romuald Pawluczyk and Arash Rohani "Scattered light in reflective and refractive optical systems", Proc. SPIE 8255, Physics and Simulation of Optoelectronic Devices XX, 82550X (28 February 2012);

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