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A beamsplitter is an optical window coated with a semi-transparent mirror-like film that splits one beam into two or more beams: part of the incident energy is reflected, a relatively small part is absorbed and the remainder is transmitted, with distinctly neutral color characteristics. Made by vacuum deposition of multi-layer dielectric films, it has no metal-film absorption — transmission plus reflection totals nearly 100%. At 45° incidence, surface 1 transmits 420–680 nm at T>95% and surface 2 splits 420–680 nm. Sizes are customized on request. Applications: optical instruments, laser pointers, stage laser platforms, fiber end-face inspection, fiber amplifier inspection, digital microscopy, fingerprint recognition, electron microscopes and broadcast image processing.