Beam splitter
OPTICAL DEVICE THAT SPLITS A BEAM OF LIGHT IN TWO, CRUCIAL PART OF MOST INTERFEROMETERS
Beamsplitter; Half-silvered mirror; Beamsplitters; Half silvered mirror; Half-silvered plane mirror; Optical splitter; Image splitter; Partially silvered mirror; Partial reflector; Beam splitting; Beam-splitter
A beam splitter or beamsplitter is an optical device that splits a beam of light into a transmitted and a reflected beam. It is a crucial part of many optical experimental and measurement systems, such as interferometers, also finding widespread application in fibre optic telecommunications.