The invention relates to a composite wave
interferometry ranging distance
system with two
femtosecond laser frequency combs. The composite wave
interferometry ranging distance
system is characterized in that a first
femtosecond laser frequency comb emits an optical pulse to a first spectroscope, the optical pulse reflected by the first spectroscope is transmitted to a first
corner reflector, and the optical pulse reflected by the first
corner reflector is transmitted to a second spectroscope through the first spectroscope. The optical pulse transmitted by the first spectroscope is transmitted to a second
corner reflector, and the optical pulse reflected by the second corner reflector is reflected to the second spectroscope through the first spectroscope. A second
femtosecond laser frequency comb emits an optical pulse to the second spectroscope, the optical pulse transmitted by the second spectroscope and an optical pulse emitted by a Michelson interference
system are mixed and transmitted to a third spectroscope, the optical pulse transmitted by the third spectroscope is received by a first photoelectric
detector in a detection mode through a first narrow-band band-pass filter, and the optical pulse reflected by the third spectroscope is received by a second photoelectric
detector in a detection mode through a second narrow-band band-pass filter. The first photoelectric
detector and the second photoelectric detector are connected with an A / D converter connected with a
signal processing unit through a corresponding
data interface to process the received
signal to obtain the required distance measuring value.