Reflectometer

Some scientific instruments commonly designated reflectometer are: Vector network analyser (VNA) Optical time domain reflectometer Reflectometer (electronics): In electronics, a directional coupler containing matched calibrated detectors in both arms of the auxiliary line, or a pair of single-detector couplers oriented so as to measure the electrical power flowing in both directions in the main line Spectrophotometer: in optics, an instrument for measuring the reflectivity or reflectance of reflecting surfaces Time-domain reflectometer

== See also == Retroreflector