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The transparency range of optical cements used to assemble cube beamsplitters limits their spectral application, roughly to between 200 nm and at the best up to 3000 nm. Plate beamsplitters do not require assembly and their applications are only limited by the transparency of the selected substrate
Beamsplitters are made either in plate or cube form. Cube beamsplitter is usually made of two right angle prisms, where hypo of one prism is coated with splitting coating.
Hot and cold mirrorsare special cases of short and long wave pass filters, respectively. Typical hot mirror reflects wavelengths longer than 700 nm up to 1100 nm and transmits spectrum below 600 nm. In this case 650 nm is usually selected as a half-maximum T point, cut-on point is 600 nm, and 700 nm is cut-off point.
Band-pass filtersare usually divided in two groups: 1. Broadband pass filters, and 2. Narrowband pass filters.