What are the black parts on both sides of the beam splitter called
At the heart of a teleprompter lies a piece of beam splitter glass, which displays scripts from a tablet, phone, or laptop, often accompanied by a black shroud to improve visibility. Beam splitters are also essential for generating holograms and similar optical illusions. It is a crucial part of many optical experimental and measurement systems, such as interferometers, also finding widespread application in fibre optic telecommunications.
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