Beamsplitter
Plate beamsplitters consist of a thin, flat glass plate that has been coated on the first surface of the substrate.
Most plate beamsplitters feature an anti-reflection coating on the second surface to remove unwanted Fresnel reflections.
Plate beamsplitters are often designed for a 45° AOI. For substrates with a 1.5 index of refraction and a 45° AOI, beam shift distance (d) can be approximated using the equation in Figure.
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