Laser Radar
Gary W. Kamerman · SPIE eBooks · 1993
The term radar originated during World War II as an acronym for radio detection and ranging. At that time, it referred to the technique of monitoring reflected, radio frequency, electromagnetic radiation to locate remote objects. Since that time, the basic radar technique has been applied to progressively shorter (and in some cases, longer) wavelengths so that the term radar no longer applies only to systems that operate at radio frequencies. Laser radar is simply radar that operates at optical frequencies and uses a laser as its source of electromagnetic radiation.