They function in optical systems that project an image while also diverting a portion of the light to a sensor for feedback or intensity monitoring. In digital projection systems, a series of dichroic beamsplitters separates white light into its red, green, and blue components. These plates are typically made of high-quality glass coated with a thin, anti-reflective film. In general, beam splitters play a crucial role in various optical applications, enabling tasks such as interferometry. The Laser Interferometer Gravitational-Wave Observatory (or LIGO) uses beamsplitters to detect gravitational waves, precision measurement systems depend on them, and high-end iPhones use them in FaceID. Beamsplitter selection is.
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