An example of this mirror can be seen in Fig.1D.ĭichroic mirrors are similar to metallic-coated mirrors but instead use a dichroic optical coating. The thickness of the metalĬoating allows for half the light to be transmitted, and the other half to be Thin coating of reflective metal, usually aluminum. Half-silvered mirrors are a sheet of glass or plastic with a very Light, half the light that enters the cube is reflected 90° and the other half is transmitted through the cube in the same direction as it entered, Thickness of the glue is carefully adjusted so that, for certain wavelengths of D) A mirror beam splitter splitting a green laser.Ĭommon types of beam splitter are either cube beam splitters or plate beam splitters (such as mirrors),Ĭube beam splitters are made from two triangular glass prisms glued C) A cube beam splitter with the incident light on the bottom left and the two split beams on the right. B) Some cube beam splitter cubes with ruler for scale. This may not always be exactly 50/50 as the reflective part can absorb some light. 1 is the incident (entering) light beam, 2 is 50% transmitted light, 3 is 50% reflected light.
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