A Century of LiDAR Evolution and Its Automotive Journey

The technological origins of LiDAR (Light Detection and Ranging) trace back to 1930, when physicist E.H. Synge proposed the idea of using high-powered searchlights to probe the atmosphere—laying the theoretical groundwork for this technology. In 1961, Hughes Aircraft Company introduced the first LiDAR-like system, "Colidar" (Coherent Light Detection and Ranging), initially developed for satellite tracking. By 1963, "Colidar Mark II" emerged as a ground-based application—a large-scale laser rangefinder capable of effective ranging up to 11 kilometers with an accuracy of 4.5 meters, primarily used for military targeting. During the Apollo 15 lunar mission in 1971, astronauts employed a laser altimeter to map the Moon’s terrain, marking the technology’s first appearance in public view. Since then, LiDAR gradually expanded from aerospace and military applications into civilian domains. On the industrial development front, Hughes Aircraft Company was founded by Howard Hughes in 1948 and operated across multiple sectors, including aerospace. In 1953, engineers Simon Ramo and Dean Wooldridge left Hughes due to management disagreements and established Ramo-Wooldridge Corporation. With support from Thompson Products, Inc., the company rapidly grew and contributed to U.S. strategic missile programs and NASA’s Pioneer 1 lunar probe. Thompson Products itself originated as the Cleveland Cap Screw Company, founded in 1904, which initially specialized in manufacturing automotive engine valves before evolving into a major automotive components supplier. In 1985, Hughes Aircraft was acquired by General Motors and later passed through ownership by Boeing and Raytheon. Meanwhile, TRW—descended from Thompson Products—was acquired by ZF Friedrichshafen (ZF) in 2015. These two corporate lineages, representing LiDAR’s aerospace heritage and automotive chassis expertise respectively, converged over half a century later in the field of intelligent driving. Although often attributed to the 2004 DARPA Grand Challenge, LiDAR’s real momentum in the automotive sector began in 2005, when Stanford University’s “Stanley” race car triumphed in the competition by relying on high-density point cloud data from LiDAR for environmental perception. Subsequent technological evolution has focused on structural optimization: early mechanical spinning LiDAR units were bulky, expensive, and unreliable; later MEMS (Micro-Electro-Mechanical Systems) solutions used miniature oscillating mirrors to scan, reducing size and cost but still facing limited mechanical lifespan; more advanced OPA (Optical Phased Array) technology aims to eliminate moving parts entirely by integrating optical antennas on chips to steer light beams, though fabrication remains extremely challenging. Today, LiDAR is widely deployed in intelligent electric vehicles. Despite challenges such as conspicuous styling and degraded performance in adverse weather conditions, the technology is undergoing a transition—from externally mounted rotating units toward miniaturization and chip-scale integration.